SUN LIFE ASSURANCE CO OF CANADA US
POS AM, 1997-05-01
LIFE INSURANCE
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<PAGE>
   
                                                       REGISTRATION NO. 33-41858
    
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
 
                              -------------------

   
                         POST-EFFECTIVE AMENDMENT NO. 6
                                       TO
    

                                    FORM S-2
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                                 --------------
                  SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
             DELAWARE                           04-2461439
 (STATE OR OTHER JURISDICTION OF             (I.R.S. EMPLOYER
  INCORPORATION OR ORGANIZATION)           IDENTIFICATION NO.)
 
       ONE SUN LIFE EXECUTIVE PARK, WELLESLEY HILLS, MASSACHUSETTS 02181
                                 (617) 237-6030
         (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING
            AREA CODE, OF REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
 
   
                                                         COPIES TO:
BONNIE S. ANGUS, ASSISTANT VICE PRESIDENT            DAVID N. BROWN, ESQ.
     SUN LIFE ASSURANCE COMPANY OF                   COVINGTON & BURLING
             CANADA (U.S.)                      1201 PENNSYLVANIA AVENUE N.W.
      ONE SUN LIFE EXECUTIVE PARK                       P.O. BOX 7566
 WELLESLEY HILLS, MASSACHUSETTS 02181              WASHINGTON, D.C. 20044
            (617) 237-6030                             (202) 662-5238
    
 
 (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
        INCLUDING AREA CODE, OF AGENT FOR SERVICE)

                                 --------------


<PAGE>
               SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)

   
                   Post Effective Amendment No. 6 to
    

                   Registration Statement on Form S-2
                    Cross Reference Sheet Pursuant To
                       Regulation S-K, Item 501(b)

       Form S-2 Item Number
             and Caption                   Location in Prospectus; Caption
- --------------------------------------  --------------------------------------
 1.  Forepart of the Registration         Cover Pages
     Statement and Outside Front Cover
     Page of Prospectus

 2.  Inside Front and Outside Back        Cover Pages; Table of Contents
     Cover Pages of Prospectus

 3.  Summary Information, Risk Factors    Cover Pages (Summary); Expense Summary
     and Ratio of Earnings to Fixed
     Charges

 4.  Use of Proceeds                      A Word About the Company, the Fixed
                                          Account,the Variable Account and the
                                          Series Fund

 5.  Determination of Offering Price      Not Applicable

 6.  Dilution                             Not Applicable

 7.  Selling Security Holders             Not Applicable

 8.  Plan of Distribution                 Distribution of the Contracts

 9.  Description of Securities to be      Cover Pages; A Word About the Company,
     Registered                           the Fixed Account, the Variable
                                          Account and the Series Fund; Purchase
                                          Payments and Contract Values During
                                          Accumulation Period; Cash Withdrawals,
                                          Withdrawal Charges and Market Value 
                                          Adjustment; Other Contractual 
                                          Provisions

10.  Interests of Named Experts and       Not Applicable
     Counsel

11.  Information with Respect to         A Word About the Company, the Fixed 
     Registrant                          Account, the Variable Account and the
                                         Series Fund; Other Contractual
                                         Provisions; Additional Information
                                         About the Company; The Company's 
                                         Directors and Executive Officers; 
                                         Legal Proceedings; Legal Matters; 
                                         Financial Statements
   
    
<PAGE>

       Form S-2 Item Number
             and Caption                   Location in Prospectus; Caption
- --------------------------------------  --------------------------------------

12.  Incorporation of Certain            Cover Pages
     Information by Reference

13.  Disclosure of Commission Position   Not Applicable
     on Indemnification for Securities
     Act Liabilities


<PAGE>
                                    PART I
                      INFORMATION REQUIRED IN PROSPECTUS


   
Attached hereto and made a part hereof is the Prospectus dated May 1, 1997.
    



<PAGE>
   
                                                                      PROSPECTUS
                                                                     MAY 1, 1997
    
 
                                  MFS REGATTA
 
               --------------------------------------------------
 
    The  master group deferred  annuity contracts (the  "Contracts") and related
certificates offered by this Prospectus are designed for use in connection  with
retirement  and  deferred  compensation  plans, some  of  which  may  qualify as
retirement programs under  Sections 401,  403, or  408 of  the Internal  Revenue
Code.  The Contracts are issued  by Sun Life Assurance  Company of Canada (U.S.)
(the "Company"),  a wholly-owned  subsidiary of  Sun Life  Assurance Company  of
Canada,  having its Principal Executive Offices  at One Sun Life Executive Park,
Wellesley Hills, Massachusetts  02181, telephone (617)  237-6030. The  Contracts
provide  that  annuity  payments  will  begin on  a  selected  future  date. The
Contracts provide for the accumulation of  values on either a variable basis,  a
fixed  basis, or a fixed  and variable basis and  provide for fixed and variable
annuity payments as elected.
 
    Each Participant under a Contract will receive a Certificate evidencing such
Participant's coverage under  the Contract.  Only one Purchase  Payment will  be
accepted  by the  Company for  each Certificate. A  Purchase Payment  must be at
least $5,000 and the prior  approval of the Company  is required before it  will
accept a Purchase Payment in excess of $1,000,000.
 
    The Participant may elect to have values under the Certificate accumulate on
a  fixed  basis in  the Fixed  Account,  which pays  interest at  the applicable
Guaranteed Interest  Rate(s)  for  the  duration  of  the  particular  Guarantee
Period(s)  selected by the  Participant, or on  a variable basis  in Sun Life of
Canada (U.S.) Variable Account F (the "Variable Account"), a separate account of
the Company, or divided between the Fixed Account and the Variable Account.  The
assets  of the Variable Account are  divided into Sub-Accounts. Each Sub-Account
uses its assets  to purchase, at  their net  asset value, shares  of a  specific
series  of  MFS/Sun  Life Series  Trust    (the "Series  Fund"),  a  mutual fund
registered  under  the  Investment   Company  Act  of   1940,  and  advised   by
Massachusetts  Financial Services  Company, a  subsidiary of  the Company. Seven
series are  available  for investment  under  the Contracts:  (1)  Money  Market
Series;  (2) High Yield Series; (3)  Capital Appreciation Series; (4) Government
Securities Series; (5) World  Governments Series; (6)  Total Return Series;  and
(7)  Managed Sectors Series. The Series Fund pays its investment adviser certain
fees charged  against the  assets of  each  Series. The  value of  the  variable
portion,  if any, of a Participant's Account  and the amount of variable annuity
payments will vary to  reflect the investment performance  of the series of  the
Series  Fund  selected by  the  Participant and  the  deduction of  the contract
charges described under "How the Contract Charges Are Assessed" on page 22.  For
more information about the Series Fund, see "The Series Fund" on page 14 and the
accompanying Series Fund prospectus.
 
                                                        (CONTINUED ON NEXT PAGE)
 
THE  CONTRACTS ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED BY,
ANY BANK,  AND  ARE NOT  FEDERALLY  INSURED  BY THE  FEDERAL  DEPOSIT  INSURANCE
CORPORATION, THE FEDERAL RESERVE BOARD, OR ANY OTHER AGENCY.
 
THESE  SECURITIES HAVE  NOT BEEN APPROVED  OR DISAPPROVED BY  THE SECURITIES AND
EXCHANGE COMMISSION NOR HAS THE COMMISSION PASSED UPON THE ACCURACY OR  ADEQUACY
OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
THIS  PROSPECTUS IS  VALID ONLY  WHEN ACCOMPANIED  BY THE  CURRENT PROSPECTUS OF
MFS/SUN LIFE  SERIES  TRUST.  YOU  SHOULD  RETAIN  THIS  PROSPECTUS  FOR  FUTURE
REFERENCE.
 
*ANY REFERENCE IN THIS PROSPECTUS TO RECEIPT BY THE COMPANY MEANS RECEIPT AT ITS
ANNUITY  SERVICE MAILING ADDRESS, C/O SUN  LIFE ANNUITY SERVICE CENTER, P.O. BOX
1024, BOSTON, MASSACHUSETTS 02103.
<PAGE>
    If the Participant elects to have  values accumulated on a fixed basis,  the
Purchase  Payment is  allocated to  one or  more Guarantee  Periods available in
connection with the Fixed Account  with durations of from  one to ten years,  as
selected  by the Participant.  The Fixed Account  is the general  account of the
Company (See "The Fixed Account" on  page 12). The Company will credit  interest
at  a rate of not less than four  percent (4%) per year, compounded annually, to
amounts allocated to the Fixed Account  and guarantees these amounts at  various
interest  rates  (the  "Guaranteed  Interest Rates")  for  the  duration  of the
Guarantee Period elected by  the Participant, subject to  the imposition of  any
applicable withdrawal charge, Market Value Adjustment, or account administration
fee.  The Company may not change a  Guaranteed Interest Rate for the duration of
the  Guarantee  Period;  however,   Guaranteed  Interest  Rates  applicable   to
subsequent  Guarantee Periods cannot be predicted  and will be determined at the
sole discretion of the Company (subject to the minimum guarantee of four percent
(4%)). That part  of the Contract  relating to the  Fixed Account is  registered
under  the Securities Act of  1933, but the Fixed Account  is not subject to the
restrictions of the Investment Company Act of 1940.
 
    The Company does not  deduct a sales charge  from the Purchase Payment  made
for a Certificate. However, if any part of a Participant's Account is withdrawn,
a  withdrawal charge (contingent  deferred sales charge) may  be assessed by the
Company. This charge is intended to reimburse the Company for expenses  relating
to  the distribution of  the Contracts and Certificates.  During the first seven
Account Years  up to  ten  percent (10%)  of the  Net  Purchase Payment  may  be
withdrawn  in each Account Year on a non-cumulative basis without the imposition
of the withdrawal  charge by the  Company. Amounts withdrawn  in excess of  such
amount  (adjusted by an  applicable Market Value Adjustment  with respect to the
Fixed Account) will be subject to a withdrawal charge ranging from 6% to 0%. The
withdrawal charge is not imposed after the end of the seventh Account Year  (See
"Withdrawal Charges" on page 19). In addition, for the first seven Account Years
the  Company deducts a distribution expense charge  at the end of each Valuation
Period equal to an annual rate of 0.15% of the daily net assets of the  Variable
Account (the staff of the Securities and Exchange Commission deems this charge a
deferred  sales  charge). There  is no  deduction  for the  distribution expense
charge after the seventh Account Anniversary. In no event will the  distribution
expense  charges  and the  withdrawal charges  assessed against  a Participant's
Account exceed 9%  of the Purchase  Payment (See "Charges  Against the  Variable
Account  for Mortality  and Expense Risks  and Distribution  Expense Charges" on
page 23).
 
    In addition, any cash withdrawal of amounts allocated to the Fixed  Account,
other  than a withdrawal effective within 30  days of the Expiration Date of the
applicable Guarantee Period, will be subject  to a Market Value Adjustment.  The
Market  Value Adjustment will reflect the  relationship between the Current Rate
(which is the  Guaranteed Interest Rate  currently declared by  the Company  for
Guarantee Periods equal to the balance of the Guarantee Period applicable to the
amount  being  withdrawn) and  the Guaranteed  Interest  Rate applicable  to the
amount being withdrawn. If the applicable Guaranteed Interest Rate is more  than
 .50%  higher  than  the  Current  Rate,  the  application  of  the  Market Value
Adjustment will  result in  a  higher payment  upon withdrawal.  Otherwise,  the
application  of the Market Value Adjustment will  result in a lower payment upon
withdrawal (See "Market Value Adjustment" on page 21).
 
    The Company reserves  the right to  defer the payment  of amounts  withdrawn
from  the Fixed  Account for  a period not  to exceed  six months  from the date
written request for such withdrawal is received by the Company.
 
    Special restrictions  on withdrawals  apply to  Certificates used  with  Tax
Sheltered  Annuities  established pursuant  to  Section 403(b)  of  the Internal
Revenue Code (See "Section 403(b) Annuities" on page 20).
 
    In addition,  under  certain circumstances  withdrawals  may result  in  tax
penalties  (See "Federal  Tax Status").  For a  discussion of  cash withdrawals,
withdrawal charges  and  the  Market Value  Adjustment  see  "Cash  Withdrawals,
Withdrawal Charges and Market Value Adjustment" on page 18.
 
    On each Account Anniversary and on surrender of a Certificate for full value
the  Company will deduct an annual account administration fee ("Account Fee") of
$30 from  the Participant's  Account. After  the Annuity  Commencement Date  the
Account  Fee will be deducted  pro rata from each  variable annuity payment made
during the year.  This charge  is to  reimburse the  Company for  administrative
expenses   related  to  the  issuance  and  maintenance  of  the  Contracts  and
Certificates (See "Account Fee" on page 22).
 
                                       2
<PAGE>
    The Company also deducts a mortality and  expense risk charge at the end  of
each  Valuation Period equal to an annual rate  of 1.25% of the daily net assets
of the Variable Account for mortality  and expense risks assumed by the  Company
(See  "Charges Against the Variable Account  for Mortality and Expense Risks and
Distribution Expense Charges" on page 23).
 
    Under certain circumstances  the Company  may substitute  shares of  another
registered  open-end investment company or unit investment trust both for Series
Fund shares already purchased by the Variable Account and as the security to  be
purchased  in the  future. Also,  upon notice to  the Owner,  Participant or the
Payee during the  annuity period, the  Company may modify  the contract if  such
modification:  (i) is  necessary to  make the  Contract or  the Variable Account
comply with any law or regulation issued  by a governmental agency to which  the
Company  or the  Variable Account  is subject;  or (ii)  is necessary  to assure
continued qualification of the Contract under the Internal Revenue Code or other
federal or state laws relating to retirement annuities or annuity contracts;  or
(iii)  is necessary to reflect a change in the operation of the Variable Account
or the Sub-Accounts; or (iv)  provides additional Variable Account and/or  fixed
accumulation  options (See "Substituted Securities"  and "Change in Operation of
Variable Account" on page 29 and "Modification" on page 30).
 
    In  addition,  the  Contracts  provide  that  the  Company  may  change  the
withdrawal   charges,  Account   Fee,  mortality   and  expense   risk  charges,
distribution expense charges, the tables used  in determining the amount of  the
first  monthly  variable  annuity payment  and  fixed annuity  payments  and the
formula used  to  calculate the  Market  Value Adjustment,  provided  that  such
modification shall apply only with respect to Participant's Accounts established
after the effective date of such modification (See "Modification" on page 30).
 
    In the event of the death of the Annuitant prior to the Annuity Commencement
Date,  the Company will pay a death benefit  to the Beneficiary. If the death of
the Annuitant occurs on or after the Annuity Commencement Date, no death benefit
will be payable except as may be provided under the Annuity Option elected  (See
"Death Benefit" on page 21).
 
    Annuity   Payments  will  begin  on   the  Annuity  Commencement  Date.  The
Participant selects the Annuity Commencement Date, frequency of payments and the
Annuity Option (See "Annuity Provisions" on page 24).
 
    Premium taxes payable to any governmental  entity will be deducted from  the
Participant's Account (See "Premium Taxes" on page 23).
 
    Subject  to  certain conditions,  and  during the  Accumulation  Period, the
Participant may,  without charge,  transfer amounts  among the  Sub-Accounts  or
Guarantee  Periods available  under the Contract.  Transfers from  or within the
Fixed Account will be subject to the Market Value Adjustment unless the transfer
is effective within  30 days of  the Expiration Date  of the amount  transferred
(See "Transfer Privilege" on page 18).
 
    After  the  Annuity Commencement  Date, the  Payee  may, subject  to certain
restrictions, exchange the  value of  a designated  number of  Annuity Units  of
particular  Sub-Accounts then credited with respect  to the particular Payee for
other Annuity Units, the value of which would be such that the dollar amount  of
an  annuity payment made on the date of  the exchange would be unaffected by the
fact of the exchange (See "Exchange of Variable Annuity Units" on page 27).
 
    The Company  will  vote Series  Fund  shares  held by  the  Sub-Accounts  at
meetings of shareholders of the Series Fund, but will follow voting instructions
received from persons having the right to give voting instructions. The Owner or
Participant  is the person having the right to give voting instructions prior to
the Annuity Commencement  Date. On or  after the Annuity  Commencement Date  the
Payee  is the person having  such voting rights. Any  shares attributable to the
Company and  Series Fund  shares for  which no  timely voting  instructions  are
received  will be voted by the Company in  the same proportion as the shares for
which instructions are received from persons  having such right (See "Voting  of
Series Fund Shares" on page 28).
 
                                       3
<PAGE>
    The  Company will furnish Participants and  such other persons having voting
rights with certain reports and statements described under "Periodic Reports" on
page 29. Such reports, other than  prospectuses, will not include the  Company's
financial statements.
 
    If a Participant is not satisfied with the Certificate it may be returned to
the  Company at its Annuity Service Mailing Address within ten days after it was
delivered to the Participant. When the Company receives the returned Certificate
it will be  cancelled and  the Participant's  Account Value  at the  end of  the
Valuation  Period during which the Certificate  was received by the Company will
be refunded. However, if  applicable state law so  requires, the full amount  of
any  Purchase Payment received by the Company  will be refunded, the "free look"
period may be  greater than ten  days and alternative  methods of returning  the
Certificate may be acceptable.
 
                             AVAILABLE INFORMATION
 
    The  Company is subject to the  informational requirements of the Securities
Exchange Act of 1934 (the "1934  Act"), as amended, and in accordance  therewith
files  reports and other information with the Securities and Exchange Commission
(the "Commission").  Such reports  and other  information can  be inspected  and
copied  at the public reference  facilities of the Commission  at Room 1024, 450
Fifth Street, N.W., Washington,  D.C. and at  the Commission's Regional  Offices
located at 75 Park Place, New York, New York and Northwestern Atrium Center, 500
West  Madison Street, Suite  1400, Chicago, Illinois  60661-2511. Copies of such
materials also  can  be  obtained  from the  Public  Reference  Section  of  the
Commission  at 450  Fifth Street,  N.W., Washington,  D.C. 20549,  at prescribed
rates.
 
    The  Company   has   filed  registration   statements   (the   "Registration
Statements")  with the Commission  under the Securities Act  of 1933 relating to
the Contracts offered by  this Prospectus. This Prospectus  has been filed as  a
part  of the Registration Statements and does not contain all of the information
set forth in the Registration Statements and exhibits thereto, and reference  is
hereby made to such Registration Statements and exhibits for further information
relating  to the Company and the  Contracts. The Registration Statements and the
exhibits thereto may  be inspected  and copied, and  copies can  be obtained  at
prescribed rates, in the manner set forth in the preceding paragraph.
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
   
    The  Annual  Report  on Form  10-K  for  the year  ended  December  31, 1996
heretofore filed  by the  Company with  the  Commission under  the 1934  Act  is
incorporated by reference in this Prospectus.
    
 
    Any statement contained in a document incorporated by reference herein shall
be deemed modified or superseded hereby to the extent that a statement contained
in  a later-filed document  or herein shall modify  or supersede such statement.
Any statement  so modified  or superseded  shall  not be  deemed, except  as  so
modified or superseded, to constitute a part of this Prospectus.
 
   
    The  Company will furnish, without charge, to  each person to whom a copy of
this Prospectus is delivered, upon the written or oral request of such person, a
copy of the document referred to above which has been incorporated by  reference
in  this Prospectus, other than exhibits  to such document (unless such exhibits
are specifically incorporated by reference in the Prospectus). Requests for such
document should be directed  to Bonnie S. Angus,  Assistant Vice President,  Sun
Life  Assurance Company of Canada (U.S.),  50 Milk Street, Boston, Massachusetts
02109, telephone (617) 348-9600.
    
 
                                       4
<PAGE>
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                            PAGE
- --------------------------------------------------------------------------------
<S>                                                                         <C>
Definitions                                                                   7
- --------------------------------------------------------------------------------
Expense Summary                                                               9
- --------------------------------------------------------------------------------
Condensed Financial Information--Accumulation Unit Values                    10
- --------------------------------------------------------------------------------
Performance Data                                                             11
- --------------------------------------------------------------------------------
This Prospectus is a Catalog of Facts                                        11
- --------------------------------------------------------------------------------
Uses of the Contract                                                         11
- --------------------------------------------------------------------------------
A Word About the Company, the Fixed Account, the Variable Account and the
  Series Fund                                                                12
    The Company                                                              12
    The Fixed Account                                                        12
    The Variable Account                                                     13
    The Series Fund                                                          14
- --------------------------------------------------------------------------------
Purchase Payments and Contract Values During Accumulation Period             16
    Purchase Payments                                                        16
    Participant's Account                                                    16
    Variable Accumulation Value                                              16
    Fixed Accumulation Value                                                 17
    Guarantee Periods                                                        17
    Guaranteed Interest Rates                                                18
    Transfer Privilege                                                       18
- --------------------------------------------------------------------------------
Cash Withdrawals, Withdrawal Charges and Market Value Adjustment             18
    Cash Withdrawals                                                         18
    Withdrawal Charges                                                       19
    Section 403(b) Annuities                                                 20
    Market Value Adjustment                                                  21
- --------------------------------------------------------------------------------
Death Benefit                                                                21
    Death Benefit Provided by the Contract                                   21
    Election and Effective Date of Election                                  21
    Payment of Death Benefit                                                 22
    Amount of Death Benefit                                                  22
- --------------------------------------------------------------------------------
How the Contract Charges Are Assessed                                        22
    Account Fee                                                              22
    Premium Taxes                                                            23
    Charges Against the Variable Account for Mortality and Expense Risks
     and Distribution Expense Charges                                        23
    Withdrawal Charges                                                       24
- --------------------------------------------------------------------------------
Annuity Provisions                                                           24
    Annuity Commencement Date                                                24
    Election--Change of Annuity Option                                       24
    Annuity Options                                                          25
    Determination of Annuity Payments                                        26
    Fixed Annuity Payments                                                   26
    Variable Annuity Payments                                                26
    Variable Annuity Unit Value                                              26
    Exchange of Variable Annuity Units                                       27
    Annuity Payment Rates                                                    27
- --------------------------------------------------------------------------------
</TABLE>
 
                                       5
<PAGE>
                         TABLE OF CONTENTS--(CONTINUED)
   
<TABLE>
<CAPTION>
                                                                            PAGE
- --------------------------------------------------------------------------------
<S>                                                                         <C>
Other Contractual Provisions                                                 27
    Payment Limits                                                           27
    Designation and Change of Beneficiary                                    27
    Exercise of Contract Rights                                              27
    Change of Ownership                                                      28
    Death of Participant                                                     28
    Voting of Series Fund Shares                                             28
    Periodic Reports                                                         29
    Substituted Securities                                                   29
    Change in Operation of Variable Account                                  29
    Splitting Units                                                          30
    Modification                                                             30
    Discontinuance of New Participants                                       30
    Custodian                                                                30
    Right to Return                                                          30
- --------------------------------------------------------------------------------
Federal Tax Status                                                           31
    Introduction                                                             31
    Tax Treatment of the Company and the Variable Account                    31
    Taxation of Annuities in General                                         31
    Qualified Retirement Plans                                               33
    Pension and Profit-Sharing Plans                                         33
    Tax-Sheltered Annuities                                                  34
    Individual Retirement Accounts                                           34
- --------------------------------------------------------------------------------
Administration of the Contracts                                              34
- --------------------------------------------------------------------------------
Distribution of the Contracts                                                34
- --------------------------------------------------------------------------------
Additional Information About the Company                                     35
    Selected Financial Data                                                  35
    Management's Discussion and Analysis of Financial Condition and
     Results of Operations                                                   35
    Liquidity                                                                38
    Reinsurance                                                              38
    Reserves                                                                 38
    Investments                                                              39
    Competition                                                              39
    Employees                                                                39
    Properties                                                               39
- --------------------------------------------------------------------------------
The Company's Directors and Executive Officers                               39
- --------------------------------------------------------------------------------
State Regulation                                                             42
- --------------------------------------------------------------------------------
Legal Proceedings                                                            43
- --------------------------------------------------------------------------------
Legal Matters                                                                43
- --------------------------------------------------------------------------------
Accountants                                                                  43
- --------------------------------------------------------------------------------
Registration Statements                                                      43
- --------------------------------------------------------------------------------
Financial Statements                                                         43
- --------------------------------------------------------------------------------
Appendix A--Variable Accumulation Unit Value, Variable Annuity Unit Value
  and Variable Annuity Payment Calculations                                  81
Appendix B--State Premium Taxes                                              81
Appendix C--Withdrawals, Withdrawal Charges and the Market Value
  Adjustment                                                                 82
Appendix D--Calculation of Performance Data; Advertising and Sales
  Literature                                                                 84
</TABLE>
    
 
                                       6
<PAGE>
                                  DEFINITIONS
 
    The following terms as used in this Prospectus have the indicated meanings:
 
    ACCOUNT  YEARS AND ACCOUNT  ANNIVERSARIES:  The first  Account Year shall be
the period of 12  months plus a  part of a  month as measured  from the Date  of
Coverage  for each  Participant to  the first  day of  the calendar  month which
follows the  calendar month  of coverage.  All Account  Years and  Anniversaries
thereafter  shall be 12 month periods based  upon such first day of the calendar
month which follows the calendar month of coverage. If, for example, the Date of
Coverage is in March, the first Account Year will be determined from the Date of
Coverage but will end on the last day of March in the following year; all  other
Account Years and all Account Anniversaries will be measured from April 1.
 
    ACCUMULATION  PERIOD:  The  period before the  Annuity Commencement Date and
during the lifetime of the Annuitant.
 
    *ANNUlTANT:  The  person or persons  named in the  Application and on  whose
life  the first annuity payment is to be made. The Participant may not designate
a "Co-Annuitant" unless the Participant and Annuitant are different persons.  If
more than one person is so named, all provisions of the Contract which are based
on  the death of the "Annuitant" will be based  on the date of death of the last
survivor of the persons so named. By example, the death benefit will become  due
only  upon  the death,  prior  to the  Annuity  Commencement Date,  of  the last
survivor of the persons so named. Collectively, these persons are referred to in
this Contract  as "Annuitants."  The  Participant is  not  permitted to  name  a
"Co-Annuitant" under a Qualified Contract.
 
    *ANNUITY  COMMENCEMENT DATE:   The date  on which the  first annuity payment
under each Certificate is to be made.
 
    *ANNUITY OPTION:  The method for making annuity payments.
 
    ANNUITY UNIT:  A unit  of measure used in the  calculation of the amount  of
the  second  and  each subsequent  variable  annuity payment  from  the Variable
Account.
 
    APPLICATION:  The document signed by each Participant that serves as his  or
her application for participation under this Contract.
 
    *BENEFICIARY:   The person or  entity having the right  to receive the death
benefit set forth in each Certificate  and, for Non-Qualified Contracts, who  is
the  "designated  beneficiary" for  purposes of  Section  72(s) of  the Internal
Revenue Code in the event of the Participant's death.
 
    CERTIFICATE:  The document for each Participant which evidences the coverage
of the Participant under the Contract.
 
    COMPANY:  Sun Life Assurance Company of Canada (U.S.).
 
    CONTRACT APPLICATION:  The document signed  by the Owner that evidences  the
Owner's application for this Contract.
 
    DATE  OF  COVERAGE:   The  date  on  which a  Participant's  Account becomes
effective.
 
    DUE PROOF  OF  DEATH:   An  original certified  copy  of an  official  death
certificate,  an original  certified copy  of a decree  of a  court of competent
jurisdiction as to the finding of death, or any other proof satisfactory to  the
Company.
 
    FIXED  ACCOUNT:   The Fixed  Account consists of  all assets  of the Company
other than those allocated to a separate account of the Company.
 
    FIXED ANNUITY:   An annuity with  payments which  do not vary  as to  dollar
amount.
 
    GUARANTEE AMOUNT:  Any portion of a Participant's Account Value allocated to
a  particular  Guarantee Period  with  a particular  Expiration  Date (including
interest earned thereon).
 
    GUARANTEE PERIOD:   The  period  for which  a  Guaranteed Interest  Rate  is
credited. This period may be one to ten years, as elected by the Participant.
 
- ------------------------
*As specified in the Application, unless changed.
 
                                       7
<PAGE>
    GUARANTEED INTEREST RATE:  The rate of interest credited by the Company on a
compound annual basis during any Guarantee Period.
 
    ISSUE DATE:  The date on which the Contract becomes effective.
 
    NON-QUALIFIED  CONTRACT:   A Contract used  in connection  with a retirement
plan which  does  not  receive  favorable federal  income  tax  treatment  under
Sections  401,  403, or  408  of the  Internal  Revenue Code.  The Participant's
interest in  the Contract  must be  owned by  a natural  person or  agent for  a
natural  person for the Contract to receive favorable income tax treatment as an
annuity.
 
    *OWNER:  The  person, persons  or entity  entitled to  the ownership  rights
stated  in the Contract and  in whose name or names  the Contract is issued. The
Owner may designate a trustee or custodian of a retirement plan which meets  the
requirements  of Section 401,  Section 408(c) or Section  408(k) of the Internal
Revenue Code to serve  as legal owner  of assets of a  retirement plan, but  the
term  "Owner", as used herein, shall refer to the organization entering into the
Contract.
 
    PARTICIPANT:   The  person named  in  the  Certificate who  is  entitled  to
exercise all rights and privileges of ownership under the Certificate, except as
reserved by the Owner.
 
    PARTICIPANT'S ACCOUNT:  An account established for each Participant to which
the Net Purchase Payment is credited.
 
    PARTICIPANT'S  ACCOUNT VALUE:  The Variable Accumulation Value, if any, plus
the Fixed  Accumulation  Value, if  any,  of  a Participant's  Account  for  any
Valuation Period.
 
    PAYEE:   A recipient  of payments under  the Contract. The  term includes an
Annuitant or a Beneficiary  who becomes entitled to  benefits upon the death  of
the Annuitant.
 
    PURCHASE  PAYMENT (PAYMENT):  An amount paid to the Company as consideration
for the benefits provided by the Contract.
 
    QUALIFIED CONTRACT:  A  Contract used in connection  with a retirement  plan
which  receives favorable federal income tax  treatment under Sections 401, 403,
or 408 of the Internal Revenue Code of 1986, as amended.
 
    RECEIPT:  Receipt  by the  Company at  its Annuity  Service Mailing  Address
shown on the cover of this Prospectus.
 
    SERIES FUND:  MFS/Sun Life Series Trust.
 
    SEVEN YEAR ANNIVERSARY:  The seventh Account Anniversary and each succeeding
Account  Anniversary  occurring  at  any  seven  year  interval  thereafter, for
example, the 14th, 21st and 28th Account Anniversaries.
 
    SUB-ACCOUNT:  That portion of the  Variable Account which invests in  shares
of a specific series or sub-series of the Series Fund.
 
    VALUATION  PERIOD:   The period of  time from one  determination of Variable
Accumulation Unit and Annuity Unit  values to the next subsequent  determination
of  these values. Such  determination shall be made  as of the  close of the New
York Stock Exchange on  each day the  Exchange is open for  trading and on  such
other  days on which  there is a  sufficient degree of  trading in the portfolio
securities of the Variable Account so that the values of the Variable  Account's
Accumulation Units and Annuity Units might be materially affected.
 
    VARIABLE  ACCOUNT:  A  separate account of the  Company consisting of assets
set aside by the Company, the  investment performance of which is kept  separate
from that of the general assets of the Company.
 
    VARIABLE  ACCUMULATION UNIT:  A  unit of measure used  in the calculation of
the value of the variable portion of a Participant's Account.
 
    VARIABLE ANNUITY:  An annuity with  payments which vary as to dollar  amount
in  relation  to the  investment performance  of  specified Sub-Accounts  of the
Variable Account.
 
- ------------------------
*As specified in the Application, unless changed.
 
                                       8
<PAGE>
                                EXPENSE SUMMARY
 
    The purpose of the following table  and Example is to help Participants  and
prospective  purchasers to  understand the  costs and  expenses that  are borne,
directly and  indirectly, by  Participants WHEN  PAYMENTS ARE  ALLOCATED TO  THE
VARIABLE ACCOUNT. The table reflects expenses of the Variable Account as well as
of the Series Fund. The information set forth should be considered together with
the narrative provided under the heading "How the Contract Charges Are Assessed"
in  this Prospectus, and with  the Series Fund's prospectus.  In addition to the
expenses listed below, premium taxes may be applicable.
   
<TABLE>
<CAPTION>
                                                                CAPITAL
                                       MONEY                    APPRE-     GOVERNMENT     WORLD        TOTAL       MANAGED
PARTICIPANT                            MARKET     HIGH YIELD    CIATION    SECURITIES   GOVERNMENTS    RETURN      SECTORS
TRANSACTION EXPENSES                   SERIES       SERIES      SERIES       SERIES       SERIES       SERIES       SERIES
- -----------------------------------  ----------   ----------   ---------   ----------   ----------   ----------   ----------
<S>                                  <C>          <C>          <C>         <C>          <C>          <C>          <C>
Sales Load Imposed on Purchases....         0           0            0         0              0          0             0
Deferred Sales Load (as a
  percentage of Participant's
  Account Value withdrawn) (1)
  Account Year
    1..............................         6%          6%           6%        6%             6%         6%            6%
    2..............................         6%          6%           6%        6%             6%         6%            6%
    3..............................         5%          5%           5%        5%             5%         5%            5%
    4..............................         5%          5%           5%        5%             5%         5%            5%
    5..............................         4%          4%           4%        4%             4%         4%            4%
    6..............................         4%          4%           4%        4%             4%         4%            4%
    7..............................         3%          3%           3%        3%             3%         3%            3%
    thereafter.....................         0%          0%           0%        0%             0%         0%            0%
Exchange fee (2)...................         0           0            0         0              0          0             0
 
<CAPTION>
ANNUAL ACCOUNT FEE                                                $30 Per Participant's Account
- -----------------------------------
SEPARATE ACCOUNT ANNUAL EXPENSES
- -----------------------------------
<S>                                  <C>          <C>          <C>         <C>          <C>          <C>          <C>
(as a percentage of average
separate account assets)
Mortality and Expense Risk Fees....      1.25%       1.25%        1.25%     1.25%          1.25%      1.25%         1.25%
Distribution Expense Charge (3)....      0.15%       0.15%        0.15%     0.15%          0.15%      0.15%         0.15%
Other Fees and Expenses of the
  Separate Account.................      0.00%       0.00%        0.00%     0.00%          0.00%      0.00%         0.00%
Total Separate Account Annual
  Expenses.........................      1.40%       1.40%        1.40%     1.40%          1.40%      1.40%         1.40%
<CAPTION>
SERIES FUND ANNUAL EXPENSES
- -----------------------------------
<S>                                  <C>          <C>          <C>         <C>          <C>          <C>          <C>
(as a percentage of Series Fund
average net assets)
Management Fees....................      0.50%       0.75%        0.75%     0.55%          0.75%      0.68%         0.75%
Other Expenses.....................      0.06%       0.09%        0.05%     0.08%          0.15%      0.04%         0.07%
Total Series Fund Annual
  Expenses.........................      0.56%       0.84%        0.80%     0.63%          0.90%      0.72%         0.82%
</TABLE>
    
 
- ------------------------
(1) A portion of  the Participant's Account may  be withdrawn each year  without
    imposition  of any withdrawal charge, and  after a Purchase Payment has been
    held by the Company for seven  years the entire Participant's Account  Value
    may be withdrawn free of the withdrawal charge.
 
(2)  A Market  Value Adjustment  may be imposed  on amounts  transferred from or
    within the Fixed Account.
 
(3) The  Distribution Expense  Charge is  imposed only  during the  first  seven
    Account Years. This charge may be deemed a deferred sales charge.
 
                                       9
<PAGE>
                                    EXAMPLE
 
    If  you surrender your Certificate at the end of the applicable time period,
you would  pay the  following expenses  on a  $1,000 investment,  assuming a  5%
annual return on assets:
 
   
<TABLE>
<CAPTION>
                                                           1 YEAR       3 YEARS      5 YEARS     10 YEARS
                                                         -----------  -----------  -----------  -----------
<S>                                                      <C>          <C>          <C>          <C>
Money Market Series                                       $      74    $     107    $     142    $     229
High Yield Series                                                77          115          156          257
Capital Appreciation Series                                      76          114          154          253
Government Securities Series                                     75          109          145          236
World Governments Series                                         77          117          159          264
Total Return Series                                              76          111          150          245
Managed Sectors Series                                           77          114          155          255
</TABLE>
    
 
    If  you do not surrender your Certificate, or if you annuitize at the end of
the applicable time  period, you would  pay the following  expenses on a  $1,000
investment, assuming a 5% annual return on assets:
 
   
<TABLE>
<CAPTION>
                                                          1 YEAR       3 YEARS      5 YEARS     10 YEARS
                                                        -----------  -----------  -----------  -----------
<S>                                                     <C>          <C>          <C>          <C>
Money Market Series                                      $      20    $      62    $     106    $     229
High Yield Series                                               23           70          120          257
Capital Appreciation Series                                     22           69          118          253
Government Securities Series                                    21           64          109          236
World Governments Series                                        23           72          123          264
Total Return Series                                             22           66          114          245
Managed Sectors Series                                          23           69          119          255
</TABLE>
    
 
    THE  EXAMPLE SHOULD  NOT BE  CONSIDERED A  REPRESENTATION OF  PAST OR FUTURE
EXPENSES, AND ACTUAL EXPENSES MAY BE GREATER OR LOWER THAN THOSE SHOWN.
 
           CONDENSED FINANCIAL INFORMATION--ACCUMULATION UNIT VALUES
 
    The following information should  be read in  conjunction with the  Variable
Account's  financial statements included  elsewehere in this  Prospectus, all of
which has been audited  by Deloitte & Touche  LLP, independent certified  public
accountants.
   
<TABLE>
<CAPTION>
                                     PERIOD ENDED                           YEAR ENDED DECEMBER 31,
                                     DECEMBER 31,    ----------------------------------------------------------------------
                                         1989*          1990        1991        1992        1993        1994        1995
                                     -------------   ----------  ----------  ----------  ----------  ----------  ----------
<S>                                  <C>             <C>         <C>         <C>         <C>         <C>         <C>
CAPITAL APPRECIATION SERIES
  Unit Value:
    Beginning of period              $    10.0000    $  10.1193  $   9.0168  $  12.5296  $  14.0559  $  16.3574  $  15.5512
    End of period                    $    10.1193    $   9.0168  $  12.5296  $  14.0559  $  16.3574  $  15.5512  $  20.6225
  Units outstanding end of period         264,632     3,677,247   7,517,358   8,168,037   7,272,302   6,184,731   6,615,207
GOVERNMENT SECURITIES SERIES
  Unit Value:
    Beginning of period              $    10.0000    $  10.0333  $  10.7567  $  12.2849  $  12.9408  $  13.8738  $  13.3872
    End of period                    $    10.0333    $  10.7567  $  12.2849  $  12.9408  $  13.8738  $  13.3872  $  15.5323
  Units outstanding end of period         179,505     2,723,676   5,194,019   4,761,049   4,708,841   4,235,203   3,535,152
HIGH YIELD SERIES
  Unit Value:
    Beginning of period              $    10.0000    $   9.8487  $   8.3800  $  12.1924  $  13.8294  $  16.0549  $  15.4801
    End of period                    $     9.8487    $   8.3800  $  12.1924  $  13.8294  $  16.0549  $  15.4801  $  17.8678
  Units outstanding end of period          24,369       247,285     795,298   1,031,001   1,087,265     839,825   1,068,412
MANAGED SECTORS SERIES
  Unit Value:
    Beginning of period              $    10.0000    $   9.8911  $   8.7393  $  13.9725  $  14.6738  $  15.0587  $  14.5653
    End of period                    $     9.8911    $   8.7393  $  13.9725  $  14.6738  $  15.0587  $  14.5653  $  18.9987
  Units outstanding end of period         126,499     1,410,497   2,409,951   2,768,568   2,431,072   2,066,642   2,150,361
MONEY MARKET SERIES
  Unit Value:
    Beginning of period              $    10.0000    $  10.0971  $  10.7366  $  11.2031  $  11.4176  $  11.5560  $  11.8185
    End of period                    $    10.0971    $  10.7366  $  11.2031  $  11.4176  $  11.5560  $  11.8185  $  12.2910
  Units outstanding end of period         221,039     5,562,419   6,380,774   4,115,845   3,081,737   3,873,044   3,453,907
TOTAL RETURN SERIES
  Unit Value:
    Beginning of period              $    10.0000    $  10.1677  $  10.2969  $  12.3469  $  13.2211  $  14.7834  $  14.2495
    End of period                    $    10.1677    $  10.2969  $  12.3469  $  13.2211  $  14.7834  $  14.2495  $  17.8165
  Units outstanding end of period         391,244     8,211,655  15,599,909  16,375,301  15,806,723  14,225,539  13,106,997
WORLD GOVERNMENTS SERIES
  Unit Value:
    Beginning of period              $    10.0000    $  10.2725  $  11.4930  $  13.0187  $  12.8985  $  15.1215  $  14.2437
    End of period                    $    10.2725    $  11.4930  $  13.0187  $  12.8985  $  15.1215  $  14.2437  $  16.2514
  Units outstanding end of period          20,710       748,280   2,220,300   2,205,650   2,300,611   1,967,375   1,730,002
 
<CAPTION>
 
                                        1996
                                     ----------
<S>                                  <C>
CAPITAL APPRECIATION SERIES
  Unit Value:
    Beginning of period              $  20.6225
    End of period                    $  24.7064
  Units outstanding end of period     6,316,305
GOVERNMENT SECURITIES SERIES
  Unit Value:
    Beginning of period              $  15.5323
    End of period                    $  15.5644
  Units outstanding end of period     3,362,650
HIGH YIELD SERIES
  Unit Value:
    Beginning of period              $  17.8678
    End of period                    $  19.7545
  Units outstanding end of period     1,204,380
MANAGED SECTORS SERIES
  Unit Value:
    Beginning of period              $  18.9987
    End of period                    $  22.0312
  Units outstanding end of period     2,202,213
MONEY MARKET SERIES
  Unit Value:
    Beginning of period              $  12.2910
    End of period                    $  12.7175
  Units outstanding end of period     3,859,738
TOTAL RETURN SERIES
  Unit Value:
    Beginning of period              $  17.8165
    End of period                    $  20.0405
  Units outstanding end of period    12,461,003
WORLD GOVERNMENTS SERIES
  Unit Value:
    Beginning of period              $  16.2514
    End of period                    $  16.7734
  Units outstanding end of period     1,460,289
</TABLE>
    
 
- ------------------------
* From July 13, 1989 (date of commencement of operations) to December 31, 1989.
 
                                       10
<PAGE>
                                PERFORMANCE DATA
 
    From  time to time the Variable Account may publish reports to shareholders,
sales literature and advertisements containing performance data relating to  the
Sub-Accounts.  Performance data  will consist  of total  return quotations which
will always include quotations for the  period subsequent to the date each  Sub-
Account  became available for investment under the Contracts, and for recent one
year and, when applicable, five and  ten year periods. Such quotations for  such
periods  will be  the average  annual rates  of return  required for  an initial
Purchase Payment  of $1,000  to  equal the  actual variable  accumulation  value
attributable  to such  Purchase Payment  on the  last day  of the  period, after
reflection of all applicable withdrawal  and contract charges. In addition,  the
Variable  Account may  calculate non-standardized  rates of  return that  do not
reflect withdrawal and contract  charges. Results calculated without  withdrawal
and/or contract charges will be higher. Performance figures used by the Variable
Account  are based on the  actual historical performance of  the Series Fund for
specified  periods,  and  the  figures  are  not  intended  to  indicate  future
performance.  The  Variable  Account may  also  from  time to  time  compare its
investment performance to various unmanaged indices or other variable  annuities
and  may  refer  to certain  rating  and  other organizations  in  its marketing
materials. More  detailed  information  on  the computations  is  set  forth  in
Appendix D.
 
                     THIS PROSPECTUS IS A CATALOG OF FACTS
 
    This Prospectus contains information about the master group deferred annuity
contract  (the "Contract") which provides fixed benefits, variable benefits or a
combination of both.  It describes  its uses  and objectives,  its benefits  and
costs,  and  the rights  and privileges  of  the Owner  and the  Participant, as
applicable. It  also  contains  information  about  the  Company,  the  Variable
Account,  the Fixed Account and the Series  Fund. It has been carefully prepared
in non-technical language to help you decide whether the purchase of a  Contract
will fit the needs of your retirement plan. We urge you to read it carefully and
retain it for future reference. The Contract has appropriate provisions relating
to  variable  and  fixed  accumulation values  and  variable  and  fixed annuity
payments. A Variable Annuity and a Fixed Annuity have certain similarities. Both
provide that the Purchase Payment, less certain deductions, will be  accumulated
prior  to the  Annuity Commencement Date.  After the  Annuity Commencement Date,
annuity payments  will  be  made  to the  Annuitant.  The  Company  assumes  the
mortality  and expense risks  under the Contract, for  which it receives certain
amounts. The  significant difference  between  a Variable  Annuity and  a  Fixed
Annuity  is that under a Variable Annuity, all investment risk is assumed by the
Participant or  Payee and  the amounts  of the  annuity payments  vary with  the
investment  performance  of the  Variable Account;  under  a Fixed  Annuity, the
investment risk  is  assumed  by  the  Company (except  in  the  case  of  early
withdrawals  (See  "Cash Withdrawals"  and "Market  Value Adjustment"))  and the
amounts of the annuity payments do not vary. However, the Participant bears  the
risk  that the Guaranteed Interest  Rate to be credited  on amounts allocated to
the Fixed Account  may not  exceed the  minimum guaranteed  rate of  4% for  any
Guarantee Period.
 
                              USES OF THE CONTRACT
 
    The  Contract is designed for use  in connection with retirement plans which
meet the requirements of  Section 401 (including  Section 401(k)), Section  403,
Section  408(b), Section 408(c) or Section  408(k) of the Internal Revenue Code,
however, the Company may discontinue  offering new Contracts in connection  with
certain  types of qualified plans. Certain  federal tax advantages are currently
available to retirement  plans which qualify  as (1) self-employed  individuals'
retirement  plans  under Section  401; (2)  corporate or  association retirement
plans under Section  401; (3) annuity  purchase plans sponsored  by certain  tax
exempt  organizations  or public  school systems  under  Section 403(b);  or (4)
individual retirement accounts, including  employer or association of  employees
individual  retirement accounts under Section  408(c) and SEP-IRAs under Section
408(k) (See "Federal Tax Status").
 
    The Contract is  also designed so  that it  may be used  in connection  with
certain  non-tax-qualified retirement plans,  such as payroll  savings plans and
such other groups (trusteed or nontrusteed) as may be eligible under  applicable
law.
 
    A   Contract  is  issued  to  the  Owner  covering  all  Participants.  Each
Participant receives  a Certificate  which evidences  his or  her  participation
under the Contract. For the purposes of determining benefits under the Contract,
a Participant's Account is established for each Participant.
 
                                       11
<PAGE>
                           A WORD ABOUT THE COMPANY,
          THE FIXED ACCOUNT, THE VARIABLE ACCOUNT AND THE SERIES FUND
 
THE COMPANY
    The Company is a stock life insurance company incorporated under the laws of
Delaware  on January 12, 1970.  Its Executive Office mailing  address is One Sun
Life Executive  Park,  Wellesley  Hills, Massachusetts  02181,  telephone  (617)
237-6030.  It has obtained  authorization to do  business in forty-eight states,
the District of Columbia and Puerto Rico, and it is anticipated that the Company
will be authorized to  do business in  all states except  New York. The  Company
issues  life insurance policies and individual  and group annuities. The Company
has formed a wholly-owned subsidiary, Sun Life Insurance and Annuity Company  of
New  York, which issues individual  fixed and combination fixed/variable annuity
contracts and group  life and  long-term disability  insurance in  New York  and
offers in New York contracts similar to the Contract offered by this Prospectus.
The  Company's other  subsidiaries are Massachusetts  Financial Services Company
and Sun Capital Advisers, Inc.,  registered investment advisers, Sun  Investment
Services Company, a registered broker-dealer and investment adviser, Sun Benefit
Services  Company,  Inc.,  which  offers  claims,  administrative  and actuarial
services, New London Trust, F.S.B., a federally chartered savings bank, Sun Life
Financial Services Limited,  which provides  off-shore administrative  services,
and Massachusetts Casualty Insurance Company, which issues individual disability
income policies.
 
   
    The  Company is a  wholly-owned subsidiary of Sun  Life Assurance Company of
Canada ("Sun Life (Canada)"),  150 King Street  West, Toronto, Ontario,  Canada.
Sun  Life (Canada) is  a mutual life insurance  company incorporated pursuant to
Act of Parliament of Canada in 1865  and currently transacts business in all  of
the Canadian provinces and territories, all states except New York, the District
of Columbia, Puerto Rico, the Virgin Islands, Great Britain, Ireland, Hong Kong,
Bermuda  and the Philippines. It is expected that  as of May 1, 1997, all of the
outstanding common  stock  of  the  Company  will  be  held  by  a  wholly-owned
subsidiary of Sun Life (Canada), Sun Life of Canada (U.S.) Holdings, Inc., which
has been formed to serve as the holding company for the U.S. subsidiaries of Sun
Life (Canada) and for general corporate financing purposes.
    
 
THE FIXED ACCOUNT
    The  Fixed Account is  made up of all  of the general  assets of the Company
other than those allocated to any  separate account. A Purchase Payment will  be
allocated to Guarantee Periods available in connection with the Fixed Account to
the  extent elected  by the Participant  at the  time of the  establishment of a
Participant's Account. In  addition, all  or part of  the Participant's  Account
Value  may be transferred  to Guarantee Periods available  under the Contract as
described under  "Transfer Privilege".  Assets supporting  amounts allocated  to
Guarantee  Periods become part  of the Company's general  account assets and are
available to  fund  the claims  of  all classes  of  customers of  the  Company,
including claims for benefits under Certificates.
 
    The  Company will  invest the  assets of the  Fixed Account  in those assets
chosen by the Company and allowed by applicable state laws regarding the  nature
and  quality of investments that may be made by life insurance companies and the
percentage of  their assets  that may  be committed  to any  particular type  of
investment.  In general, these laws  permit investments, within specified limits
and  subject  to  certain  qualifications,  in  federal,  state  and   municipal
obligations,   corporate  bonds,  preferred  and   common  stocks,  real  estate
mortgages, real estate and certain other investments.
 
    The Company intends to invest the  assets of the Fixed Account primarily  in
debt  instruments  as  follows:  (1)  Securities  issued  by  the  United States
Government or its agencies or instrumentalities, which issues may or may not  be
guaranteed  by the United  States Government; (2) Debt  securities which have an
investment grade,  at the  time  of purchase,  within  the four  highest  grades
assigned  by Moody's Investors  Services, Inc. (Aaa,  Aa, A or  Baa), Standard &
Poor's Corporation (AAA, AA, A or BBB) or any other nationally recognized rating
service; (3) Other debt instruments, including, but not limited to, issues of or
guaranteed by  banks or  bank holding  companies and  other corporations,  which
obligations,  although not rated by Moody's or  Standard & Poor's, are deemed by
the Company's management to have an investment quality comparable to  securities
which  may be purchased as stated above; and (4) Other evidences of indebtedness
secured by mortgages  or deeds  of trust  representing liens  upon real  estate.
Notwithstanding  the foregoing,  the Company  may also  invest a  portion of the
Fixed Account in below investment grade debt instruments. Instruments rated  Baa
and/or  BBB or  lower normally  involve a  higher risk  of default  and are less
liquid than higher rated instruments. If the rating of an investment grade  debt
security held by the Company is
 
                                       12
<PAGE>
subsequently  downgraded to  below investment grade,  the decision  to retain or
dispose of the security will be made based upon an individual evaluation of  the
circumstances  surrounding  the  downgrading  and  the  prospects  for continued
deterioration, stabilization and/or improvement.
 
    The Company  is not  obligated  to invest  amounts  allocated to  the  Fixed
Account  according  to any  particular strategy,  except as  may be  required by
applicable state  insurance  laws. Investment  income  from such  Fixed  Account
assets  will be allocated between the Company and all contracts participating in
the Fixed  Account,  including the  Contracts  offered by  this  Prospectus,  in
accordance with the terms of such contract.
 
    Fixed  annuity payments made  to Annuitants under the  Contracts will not be
affected by  the mortality  experience (death  rate) of  persons receiving  such
payments or of the general population. The Company assumes this "mortality risk"
by  virtue of annuity rates incorporated in the Contract which cannot be changed
(except as described under "Modification" with respect to Participant's Accounts
established after the  effective date  of such modification).  In addition,  the
Company  guarantees that  it will  not increase  charges for  maintenance of the
Contracts,  regardless  of  its  actual  expenses  (except  as  described  under
"Modification"  with  respect to  Participant's  Accounts established  after the
effective date of such modification).
 
    Investment income from the Fixed  Account allocated to the Company  includes
compensation  for  mortality and  expense risks  and distribution  expense risks
borne by the  Company in connection  with contracts participating  in the  Fixed
Account.  The Company  expects to  derive a  profit from  this compensation. The
amount of investment income allocated to the Contracts will vary from  Guarantee
Period  to Guarantee Period in the sole  discretion of the Company. However, the
Company guarantees that it will  credit interest at a rate  of not less than  4%
per  year, compounded annually, to amounts  allocated to the Fixed Account under
the Contract. The  Company may credit  interest at a  rate in excess  of 4%  per
year;  however, the Company is not obligated to credit any interest in excess of
4% per  year. There  is no  specific  formula for  the determination  of  excess
interest  credits. Such credits, if any, will be determined by the Company based
on information as to  expected investment yields. Some  of the factors that  the
Company  may  consider  in determining  whether  to credit  interest  to amounts
allocated to the  Fixed Account and  the amount thereof,  are: general  economic
trends;  rates of  return currently available  and anticipated  on the Company's
investments; regulatory  and  tax  requirements; and  competitive  factors.  The
Company's general investment strategy will be to invest amounts allocated to the
Fixed   Account  in   investment-grade  debt  securities   and  mortgages  using
immunization strategies with respect to  the applicable Guarantee Periods.  This
includes,  with respect to  investments and average  terms of investments, using
dedication (cash  flow  matching) and/  or  duration matching  to  minimize  the
Company's  risk  of not  achieving  the rates  it  is crediting  under Guarantee
Periods in volatile interest rate environments. ANY INTEREST CREDITED TO AMOUNTS
ALLOCATED TO THE FIXED ACCOUNT  IN EXCESS OF 4% PER  YEAR WILL BE DETERMINED  IN
THE  SOLE  DISCRETION OF  THE  COMPANY. THE  PARTICIPANT  ASSUMES THE  RISK THAT
INTEREST CREDITED ON AMOUNTS ALLOCATED TO  THE FIXED ACCOUNT MAY NOT EXCEED  THE
MINIMUM GUARANTEE OF 4% FOR ANY GIVEN YEAR.
 
    The  Company is aware of  no statutory limitations on  the maximum amount of
interest it  may credit,  and the  Board of  Directors has  set no  limitations.
However,  inherent in the Company's exercise of discretion in this regard is the
equitable allocation of  distributable earnings  and surplus  among its  various
policyholders and contract owners and to its sole stockholder.
 
THE VARIABLE ACCOUNT
 
    The  basic objective of  a variable annuity contract  is to provide variable
annuity payments  which will  be to  some degree  responsive to  changes in  the
economic  environment,  including inflationary  forces and  changes in  rates of
return available from various types of investments. The Contract is designed  to
seek  to accomplish this  objective by providing  that variable annuity payments
(1) will reflect the investment performance of the Variable Account with respect
to amounts allocated  to the  Variable Account before  the Annuity  Commencement
Date  and (2)  will reflect the  investment performance of  the Variable Account
after that date. Since the Variable  Account is always fully invested in  Series
Fund  shares, its investment performance  reflects the investment performance of
the  Series  Fund.  Values   of  Series  Fund  shares   held  by  the   Variable
 
                                       13
<PAGE>
Account  fluctuate and are subject to  the risks of changing economic conditions
as well as the risk inherent in  the ability of the Series Fund's management  to
make  necessary  changes in  its portfolios  to  anticipate changes  in economic
conditions. Therefore, the Participant bears the entire investment risk that the
basic objectives  of the  Contract may  not be  realized, and  that the  adverse
effects  of inflation may not be lessened and there can be no assurance that the
aggregate amount of variable annuity payments will equal or exceed the  Purchase
Payment  made with respect to a particular Participant's Account for the reasons
described above or because of the premature death of a Payee.
 
    Another important feature of the Contract related to its basic objective  is
the  Company's promise that the dollar  amount of variable annuity payments made
during the lifetime of the Payee(s) will not be adversely affected by the actual
mortality experience of the  Company or by the  actual expenses incurred by  the
Company in excess of expense deductions provided for in the Contract.
 
    Sun  Life of Canada  (U.S.) Variable Account F  (the "Variable Account") was
established by the Company as a separate  account on July 13,1989 pursuant to  a
resolution  of  its Board  of Directors.  Under Delaware  insurance law  and the
Contract, the income, gains or losses of the Variable Account are credited to or
charged against the assets of the  Variable Account without regard to the  other
income,  gains, or losses of  the Company. These assets  are held in relation to
the Contracts  described in  this  Prospectus and  such other  variable  annuity
contracts  as may  be issued by  the Company  and designated by  it as providing
benefits which  vary  in  accordance  with the  investment  performance  of  the
Variable  Account. Although the  assets maintained in  the Variable Account will
not be charged with any liabilities arising out of any other business  conducted
by  the  Company, all  obligations arising  under  the Contracts,  including the
promise to  make annuity  payments,  are general  corporate obligations  of  the
Company.
 
    The  Variable Account meets  the definition of a  separate account under the
federal securities laws and is registered  as a unit investment trust under  the
Investment  Company Act of  1940. Registration with  the Securities and Exchange
Commission  does  not  involve  supervision  of  the  management  or  investment
practices  or  policies  of  the  Variable Account  or  of  the  Company  by the
Commission.
 
    The assets  of the  Variable  Account are  divided into  Sub-Accounts.  Each
Sub-Account  invests exclusively  in shares of  a specific series  of the Series
Fund. All amounts  allocated to the  Variable Account will  be used to  purchase
Series  Fund shares as designated  by the Participant at  their net asset value.
Any and all distributions  made by the  Series Fund with  respect to the  shares
held by the Variable Account will be reinvested to purchase additional shares at
their   net  asset  value.  Deductions  from   the  Variable  Account  for  cash
withdrawals, annuity payments,  death benefits, Account  Fees, contract  charges
against  the assets of the Variable Account  for the assumption of mortality and
expense risks, distribution  expense risks,  and any applicable  taxes will,  in
effect, be made by redeeming the number of Series Fund shares at their net asset
value  equal in total value  to the amount to  be deducted. The Variable Account
will be fully invested in Series Fund shares at all times.
 
THE SERIES FUND
 
   
    MFS/Sun Life  Series Trust  (the "Series  Fund") is  an open-end  investment
management  company  registered  under  the  Investment  Company  Act  of  1940.
Currently shares of  the Series Fund  are also sold  to other separate  accounts
established  by the Company  and Sun Life  Insurance and Annuity  Company of New
York in  connection with  individual and  group variable  annuity contracts  and
variable  life insurance contracts. In the future, shares of the Series Fund may
be sold to other separate accounts established by the Company or its  affiliates
to fund other variable annuity or variable life insurance contracts. The Company
and  its affiliates will be responsible for reporting to the Series Fund's Board
of Trustees  any  potential  or  existing conflicts  between  the  interests  of
variable  annuity contract  owners/participants and  the interests  of owners of
variable life insurance contracts that provide  for investment in shares of  the
Series  Fund. The  Board of  Trustees, a  majority of  whom are  not "interested
persons" of the Series Fund, as that  term is defined in the Investment  Company
Act  of 1940, also intends to monitor  the Series Fund to identify the existence
of any such irreconcilable material conflicts  and to determine what action,  if
any,  should be taken by  the Series Fund and/or  the Company and its affiliates
(see "Management of the Series Fund" in the Series Fund prospectus).
    
 
                                       14
<PAGE>
   
    The Series Fund is composed of twenty independent portfolios of  securities,
each  of which  has separate investment  objectives and policies.  Shares of the
Series Fund  are issued  in twenty  series,  each corresponding  to one  of  the
portfolios;  however, the Contracts provide for investment only in shares of the
seven series of the  Series Fund described below.  Additional portfolios may  be
added to the Series Fund which may or may not be available for investment by the
Variable Account.
    
 
    (1)  MONEY MARKET  SERIES ("MMS")  will seek  maximum current  income to the
extent consistent with stability of principal by investing exclusively in  money
market  instruments maturing in  less than 13  months, including U.S. government
securities  and  repurchase  agreements   collateralized  by  such   securities,
obligations of the larger banks and prime commercial paper.
 
    (2)  HIGH YIELD  SERIES ("HYS")  will seek  high current  income and capital
appreciation by  investing primarily  in  fixed income  securities of  U.S.  and
foreign  issuers which may be in the lower rated categories or unrated (commonly
known as "junk bonds") and which  may include equity features. These  securities
generally  involve greater volatility of price  and risk to principal and income
and less liquidity than  securities in the higher  rated categories. Any  person
contemplating  allocating  Purchase  Payments to  the  Sub-Account  investing in
shares of the High Yield Series should review the risk disclosure in the  Series
Fund prospectus carefully and consider the investment risks involved.
 
    (3)  CAPITAL APPRECIATION SERIES  ("CAS") will seek  capital appreciation by
investing in securities of all types, with a major emphasis on common stocks.
 
    (4) GOVERNMENT  SECURITIES  SERIES  ("GSS") will  seek  current  income  and
preservation  of capital by investing  in U.S. Government and Government-related
Securities.
 
    (5) WORLD GOVERNMENTS SERIES ("WGS")  will seek moderate current income  and
preservation  and growth  of capital  by investing  in a  portfolio of  U.S. and
Foreign Government Securities.
 
    (6) TOTAL RETURN SERIES ("TRS") will seek primarily to obtain  above-average
income  (compared  to  a  portfolio  entirely  invested  in  equity  securities)
consistent with prudent  employment of  capital; its secondary  objective is  to
take advantage of opportunities for growth of capital and income. Assets will be
allocated  and reallocated from time to  time between money market, fixed income
and equity securities. Under normal market conditions, at least 25% of the Total
Return Series' assets will be invested  in fixed income securities and at  least
40% and no more than 75% of its assets will be invested in equity securities.
 
    (7) MANAGED SECTORS SERIES ("MSS") will seek capital appreciation by varying
the  weighting of its portfolio of common stocks among certain industry sectors.
Dividend income, if any, is incidental to its objective of capital appreciation.
 
   
    The investment adviser of the Series Fund, Massachusetts Financial  Services
Company  ("MFS"), is paid fees  by the Series Fund  for its services pursuant to
investment advisory agreements. MFS, a Delaware corporation, is a subsidiary  of
the  Company. MFS also serves as investment adviser  to each of the funds in the
MFS Family of Funds,  and to certain other  investment companies established  or
distributed  by MFS  and/ or  the Company.  MFS Institutional  Advisors, Inc., a
subsidiary of MFS,  provides investment advice  to substantial private  clients.
MFS  and its predecessor organizations have a history of money management dating
from 1924. MFS  operates as  an autonomous  organization and  the obligation  of
performance  with respect to the investment advisory and underwriting agreements
is solely that of MFS. The Company undertakes no obligation in this respect.
    
 
    A more  detailed  description  of  the  Series  Fund,  its  management,  its
investment  objectives, policies and restrictions and  its expenses may be found
in the accompanying  current prospectus  of the Series  Fund and  in the  Series
Fund's Statement of Additional Information.
 
                                       15
<PAGE>
        PURCHASE PAYMENTS AND CONTRACT VALUES DURING ACCUMULATION PERIOD
 
PURCHASE PAYMENTS
 
(1) PLACE, AMOUNT AND FREQUENCY
 
    All  Purchase Payments are to be paid  to the Company at its Annuity Service
Mailing Address. The Company will not accept a Purchase Payment to be  allocated
to  a Participant's Account  which is less  than $5,000. In  addition, the prior
approval of the Company is required before it will accept a Purchase Payment  in
excess of $1,000,000. Only one Purchase Payment may be made per Certificate.
 
    A  completed  Application  and the  Purchase  Payment are  forwarded  to the
Company for acceptance.  Upon acceptance,  the Contract  and Certificate(s),  as
applicable, are issued to the Owner and/or Participant(s), respectively, and the
Purchase  Payment  is then  credited to  the  Participant's Account.  A Purchase
Payment must be applied within two business days of receipt by the Company of  a
completed  Application. The  Company may retain  the Purchase Payment  for up to
five business days while  attempting to complete  an incomplete Application.  If
the  Application  cannot  be  made  complete  within  five  business  days,  the
prospective participant will be  informed of the reasons  for the delay and  the
Purchase Payment will be returned immediately unless the prospective participant
specifically  consents to the Company's retaining the Purchase Payment until the
Application is made complete. Thereafter,  the Purchase Payment must be  applied
within two business days.
 
(2) ACCOUNT CONTINUATION
 
    A  Participant's  Account shall  be  continued automatically  in  full force
during the lifetime  of the  Annuitant until  the Annuity  Commencement Date  or
until the Participant's Account is surrendered.
 
(3) ALLOCATION OF NET PURCHASE PAYMENT
 
    The  Net  Purchase Payment  is that  portion of  the Purchase  Payment which
remains after  deduction of  any  applicable premium  or  similar tax.  The  Net
Purchase  Payment will  be allocated  either to  Guarantee Periods  available in
connection with the Fixed Account or to Sub-Accounts of the Variable Account  or
to  both Sub-Accounts  and the Fixed  Account in accordance  with the allocation
factors specified in the particular Participant's Application.
 
PARTICIPANT'S ACCOUNT
 
    The Company  will establish  a Participant's  Account for  each  Participant
under  a  Contract  and  will  maintain  the  Participant's  Account  during the
Accumulation Period. The Participant's Account Value for any Valuation Period is
equal to the  sum of the  variable accumulation  value, if any,  plus the  fixed
accumulation  value, if  any, of  the Participant's  Account for  that Valuation
Period.
 
VARIABLE ACCUMULATION VALUE
 
    The variable accumulation value of a Participant's Account, if any, for  any
Valuation  Period is equal to the sum  of the value of all Variable Accumulation
Units credited to the Participant's Account for such Valuation Period.
 
(1) CREDITING VARIABLE ACCUMULATION UNITS
 
    Upon receipt of a Purchase Payment by  the Company, all or that portion,  if
any,  of  the  Net Purchase  Payment  to  be allocated  to  any  Sub-Accounts in
accordance with the  allocation factors  will be credited  to the  Participant's
Account  in the  form of Variable  Accumulation Units. The  number of particular
Variable Accumulation Units to be credited is determined by dividing the  dollar
amount allocated to the particular Sub-Account by the Variable Accumulation Unit
value  for the particular Sub-Account for  the Valuation Period during which the
Purchase Payment is applied by the Company to the Participant's Account.
 
(2) VARIABLE ACCUMULATION UNIT VALUE
 
    The Variable Accumulation Unit value for each Sub-Account was established at
$10.00 for  the  first  Valuation  Period of  the  particular  Sub-Account.  The
Variable  Accumulation  Unit  value  for  the  particular  Sub-Account  for  any
subsequent  Valuation  Period  is  determined   by  methodology  which  is   the
mathematical  equivalent of multiplying the Variable Accumulation Unit value for
the particular Sub-Account for the immediately preceding Valuation Period by the
Net   Investment   Factor    for   the   particular    Sub-Account   for    such
 
                                       16
<PAGE>
subsequent  Valuation  Period. The  Variable  Accumulation Unit  value  for each
Sub-Account for any Valuation Period  is the value determined  as of the end  of
the  particular Valuation Period  and may increase, decrease  or remain the same
from Valuation Period to Valuation Period in accordance with the Net  Investment
Factor  described below.  For a hypothetical  example of the  calculation of the
value of a Variable Accumulation Unit, see Appendix A.
 
(3) NET INVESTMENT FACTOR
 
    The Net Investment  Factor is  an index  applied to  measure the  investment
performance  of a  Sub-Account from  one Valuation Period  to the  next. The Net
Investment Factor may be  greater or less  than or equal  to one; therefore  the
value of a Variable Accumulation Unit may increase, decrease or remain the same.
 
    The  Net Investment Factor  for any Sub-Account for  any Valuation Period is
determined by  dividing (a)  by (b)  and then  subtracting (c)  from the  result
where:
 
        (a) is the net result of:
 
           (1)  the  net  asset  value  of  a  Series  Fund  share  held  in the
       Sub-Account determined as of the end of the Valuation Period, plus
 
           (2) the  per  share amount  of  any dividend  or  other  distribution
       declared  by the Series Fund on the shares held in the Sub-Account if the
       "ex-dividend" date occurs during the Valuation Period, plus or minus
 
           (3) a per share credit  or charge with respect  to any taxes paid  or
       reserved  for  by  the  Company during  the  Valuation  Period  which are
       determined by the  Company to  be attributable  to the  operation of  the
       Sub-Account (no federal income taxes are applicable under present law);
 
        (b)  is  the  net  asset  value  of a  Series  Fund  share  held  in the
    Sub-Account determined as of the end of the preceding Valuation Period; and
 
        (c) is  the  asset charge  factor  determined  by the  Company  for  the
    Valuation  Period  to reflect  the charges  for  assuming the  mortality and
    expense risks and distribution expense risk.
 
FIXED ACCUMULATION VALUE
 
    The fixed accumulation  value of a  Participant's Account, if  any, for  any
Valuation  Period is  equal to the  sum of  the values of  all Guarantee Amounts
credited to the Participant's Account for such Valuation Period.
 
GUARANTEE PERIODS
 
    The Participant may elect one or more Guarantee Period(s) with durations  of
from  one  to ten  years. The  period(s) elected  will determine  the Guaranteed
Interest Rate(s). The Purchase  Payment, or the portion  thereof (or the  amount
transferred in accordance with the Transfer Privilege) allocated to a particular
Guarantee  Period, less any applicable premium  or similar taxes and any amounts
subsequently withdrawn,  will  earn interest  at  the Guaranteed  Interest  Rate
during  the Guarantee  Period. Initial  Guarantee Periods  begin on  the Date of
Coverage or, in the case of a  transfer, on the effective date of the  transfer,
and  end the number of  calendar years in the  Guarantee Period elected from the
end of the calendar  month in which  the amount was  allocated to the  Guarantee
Period  (the "Expiration Date"). Subsequent Guarantee Periods begin on the first
day following the Expiration Date.
 
    Any portion  of a  Participant's  Account Value  allocated to  a  particular
Guarantee  Period with a  particular Expiration Date  (including interest earned
thereon) will be referred  to herein as a  "Guarantee Amount". Interest will  be
credited  daily at a rate equivalent to the compound annual rate. As a result of
renewals and transfers of portions of the Participant's Account Value  described
under  "Transfer  Privilege"  below,  which will  begin  new  Guarantee Periods,
Guarantee Amounts allocated to Guarantee Periods  of the same duration may  have
different   Expiration  Dates.  Thus  each  Guarantee  Amount  will  be  treated
separately for purposes of determining any Market Value Adjustment (see  "Market
Value Adjustment").
 
    The  Company will notify the Participant in  writing at least 45 and no more
than 75  days prior  to the  Expiration Date  for any  Guarantee Amount.  A  new
Guarantee Period of the same duration as the previous
 
                                       17
<PAGE>
Guarantee  Period  will  commence  automatically  at  the  end  of  the previous
Guarantee Period unless the Company receives, prior to the end of such Guarantee
Period, a written election  by the Participant of  a different Guarantee  Period
from  among those being offered by the  Company at such time, or instructions to
transfer all or a portion of the Guarantee Amount to one or more Sub-Accounts in
accordance with the Transfer Privilege Provision.
 
GUARANTEED INTEREST RATES
 
    The Company periodically  will establish an  applicable Guaranteed  Interest
Rate  for each of  the ten Guarantee Periods.  Current Guaranteed Interest Rates
may be changed by the Company  frequently or infrequently depending on  interest
rates  available to the Company  and other factors as  described below, but once
established rates  will  be  guaranteed  for  the  duration  of  the  respective
Guarantee Periods. However, Participant's Account Value withdrawn from the Fixed
Account  will be subject to any applicable withdrawal charge and Account Fee and
may be subject  to a  Market Value Adjustment  on withdrawal  or surrender  (See
"Market Value Adjustment").
 
    The  Guaranteed Interest Rate will  not be less than  4% per year compounded
annually. The  Company has  no  specific formula  for  determining the  rate  of
interest that it will declare as a Guaranteed Interest Rate, as these rates will
be  reflective of interest rates  available on the types  of debt instruments in
which the Company intends to invest amounts allocated to the Fixed Account  (See
"The  Fixed Account"). In addition, the  Company's management may consider other
factors in  determining  Guaranteed Interest  Rates  for a  particular  duration
including: regulatory and tax requirements; sales commissions and administrative
and  distribution expenses  borne by the  Company; general  economic trends; and
competitive factors. The Participant bears the risk that the Guaranteed Interest
Rate to be credited on amounts allocated to the Fixed Account may not exceed the
minimum guaranteed rate of 4% for any Guarantee Period.
 
TRANSFER PRIVILEGE
 
    During the Accumulation  Period the  Participant may,  upon written  request
received by the Company, transfer all or part of the Participant's Account Value
to  one or more Sub-Accounts or  Guarantee Periods available under the Contract,
subject to the following conditions: (1) not more than 12 transfers may be  made
in  any Account  Year; (2)  the amount  being transferred  may not  be less than
$1,000,  unless  the  total  Participant's  Account  Value  attributable  to   a
Sub-Account  or Guarantee Amount is being transferred; and (3) any Participant's
Account Value remaining  in a Sub-Account  or Guarantee Amount  may not be  less
than $100. In addition, transfers of all or a portion of a Guarantee Amount will
be subject to the Market Value Adjustment described below unless the transfer is
effective  within  30  days  prior  to the  Expiration  Date  applicable  to the
Guarantee Amount; and transfers involving  Variable Accumulation Units shall  be
subject  to such terms  and conditions as may  be imposed by  the Series Fund. A
transfer generally will  be effective on  the date the  request for transfer  is
received  by the Company. Under current law, there will not be any tax liability
to the Participant if a Participant makes a transfer.
 
        CASH WITHDRAWALS, WITHDRAWAL CHARGES AND MARKET VALUE ADJUSTMENT
 
CASH WITHDRAWALS
 
    At any time before the Annuity Commencement Date and during the lifetime  of
the  Annuitant, the Participant  may elect to receive  a cash withdrawal payment
from the Company. Any such election  shall specify the amount of the  withdrawal
and  will be effective on  the date that it is  received by the Company. Amounts
withdrawn may not be redeposited.
 
    The Participant may request a full  surrender or partial withdrawal. A  full
surrender  will result in  a cash withdrawal  payment equal to  the value of the
Participant's Account  at the  end  of the  Valuation  Period during  which  the
election  becomes effective less  the Account Fee, plus  or minus any applicable
Market Value Adjustment, and  less any applicable  withdrawal charge. A  request
for  a partial withdrawal  will result in  the cancellation of  a portion of the
Participant's Account Value equal  to the dollar amount  of the cash  withdrawal
payment,  plus  or minus  any applicable  Market Value  Adjustment and  plus any
applicable withdrawal charge. If a  partial withdrawal is requested which  would
leave a Participant's Account Value of less than the
 
                                       18
<PAGE>
Account  Fee, then such partial withdrawal will  be treated as a full surrender.
The Account Fee and any applicable Market Value Adjustment will be deducted from
the Participant's Account before the application of any withdrawal charge.
 
    In the  case of  a  partial withdrawal,  the  Participant may  instruct  the
Company as to the amounts to be withdrawn from each Sub-Account and/or Guarantee
Amount.  If not so instructed, the  Company will effect such withdrawal pro-rata
from each Sub-Account and  Guarantee Amount in  which the Participant's  Account
Value is invested at the end of the Valuation Period during which the withdrawal
becomes  effective. ALL CASH  WITHDRAWALS OF ANY  GUARANTEE AMOUNT, EXCEPT THOSE
EFFECTIVE WITHIN 30 DAYS PRIOR TO THE EXPIRATION DATE OF SUCH GUARANTEE  AMOUNT,
WILL BE SUBJECT TO THE MARKET VALUE ADJUSTMENT.
 
    Cash  withdrawals  from a  Sub-Account will  result  in the  cancellation of
Variable Accumulation Units  attributable to the  Participant's Account with  an
aggregate  value on  the effective  date of  the withdrawal  equal to  the total
amount by which the Sub-Account is reduced. The cancellation of such units  will
be  based on the Variable Accumulation Unit values of the Sub-Account at the end
of the Valuation Period during which the cash withdrawal is effective.
 
    The Company, upon request, will advise  the Participant of the amounts  that
would be payable in the event of a full surrender or partial withdrawal.
 
    Any cash withdrawal payment will be paid within seven days from the date the
election becomes effective, except as the Company may be permitted to defer such
payment  in accordance  with the Investment  Company Act of  1940 and applicable
state insurance law. Deferral of amounts withdrawn from the Variable Account  is
currently  permissible only  (1) for  any period (a)  during which  the New York
Stock Exchange is closed other than  customary week-end and holiday closings  or
(b)  during  which trading  on  the New  York  Stock Exchange  is  restricted as
determined by the Securities and Exchange Commission, (2) for any period  during
which  an emergency exists as a result  of which (a) disposal of securities held
by the Series Fund  is not reasonably  practicable or (b)  it is not  reasonably
practicable  to determine the value of the net  assets of the Series Fund or (3)
for such other periods  as the Securities and  Exchange Commission may by  order
permit for the protection of security holders. The Company reserves the right to
defer  the payment of amounts withdrawn from  the Fixed Account for a period not
to exceed  six months  from the  date  written request  for such  withdrawal  is
received  by the Company. The Company is not required to pay interest on amounts
so deferred.
 
    Since the Qualified Contracts offered by  this Prospectus will be issued  in
connection  with retirement plans  which meet the  requirements of Sections 401,
403, and 408 of the Internal Revenue Code, reference should be made to the terms
of the particular retirement  plan for any limitations  or restrictions on  cash
withdrawals.  For special restrictions applicable  to withdrawals from Contracts
used with Tax-Sheltered Annuities established pursuant to Section 403(b) of  the
Internal Revenue Code, see "Section 403(b) Annuities" below.
 
    A cash withdrawal under either a Qualified or Non-Qualified Contract offered
by  this Prospectus also may result in a  tax penalty. The tax consequences of a
cash withdrawal payment under both Qualified and Non-Qualified Contracts  should
be carefully considered (See "Federal Tax Status").
 
WITHDRAWAL CHARGES
 
    If a cash withdrawal is made, a withdrawal charge (contingent deferred sales
charge) may be assessed by the Company. During the first seven Account Years, up
to  10% of the Net Purchase  Payment may be withdrawn in  each Account Year on a
non-cumulative basis without  the imposition of  the withdrawal charge.  Amounts
withdrawn from a Participant's Account in excess of such amount (adjusted by any
applicable  Market Value  Adjustment) will be  subject to  the withdrawal charge
assessed against such excess amount as follows:
 
                                       19
<PAGE>
 
<TABLE>
<CAPTION>
ACCOUNT YEAR       WITHDRAWAL CHARGE
- -------------  -------------------------
<S>            <C>
      1                       6%
      2                       6%
      3                       5%
      4                       5%
      5                       4%
      6                       4%
      7                       3%
 thereafter                   0%
</TABLE>
 
    The withdrawal charge is  not imposed after the  end of the seventh  Account
Year,  nor is the withdrawal charge imposed upon payment of the death benefit or
upon amounts applied to purchase an annuity.
 
    The withdrawal  charge  is not  assessed  with respect  to  a  Participant's
Account established for the personal account of an employee of the Company or of
any  of its affiliates, or of a licensed insurance agent engaged in distributing
the Contracts.
 
    In no  event  shall the  aggregate  withdrawal charges  (together  with  the
distribution  expense  charge  described  under "How  the  Contract  Charges Are
Assessed") assessed against a  Participant's Account exceed  9% of the  Purchase
Payment.  The  Company may,  upon  notice to  the  Owner, modify  the withdrawal
charges provided  that  such  modification shall  apply  only  to  Participant's
Accounts  established  after  the  effective  date  of  such  modification  (See
"Modification").
 
    For illustrative examples of withdrawals, surrenders, withdrawal charges and
the Market Value Adjustment, see Appendix C.
 
SECTION 403(b) ANNUITIES
 
    The Internal  Revenue Code  imposes restrictions  on cash  withdrawals  from
Contracts  used with Section  403(b) Annuities. In order  for these Contracts to
receive tax deferred treatment, the Contract must provide that cash  withdrawals
of   amounts  attributable   to  salary  reduction   contributions  (other  than
withdrawals of accumulation  account value  as of December  31, 1988  ("Pre-1989
Account  Value")) may  be made  only when  the Participant  attains age  59 1/2,
separates from service with the employer,  dies or becomes disabled (within  the
meaning of Section 72(m)(7) of the Code). These restrictions apply to any growth
or  interest  on or  after January  1,  1989 on  Pre-1989 Account  Value, salary
reduction contributions made  on or  after January 1,  1989, and  any growth  or
interest on such contributions ("Restricted Account Value").
 
    Withdrawals  of  Restricted Account  Value are  also  permitted in  cases of
financial hardship,  but  only  to  the extent  of  contributions;  earnings  on
contributions  cannot be  withdrawn for  hardship reasons.  While specific rules
defining hardship have not  been issued by the  Internal Revenue Service, it  is
expected  that to qualify for a hardship distribution, the Participant must have
an immediate  and  heavy bona  fide  financial  need and  lack  other  resources
reasonably  available  to satisfy  the need.  Hardship  withdrawals (as  well as
certain other premature withdrawals)  will be subject to  a 10% tax penalty,  in
addition  to any withdrawal  charge applicable under  the Contract (See "Federal
Tax Status").
 
    Under the terms of a particular Section 403(b) plan, the Participant may  be
entitled  to transfer all or a portion of the Participant's Account Value to one
or more alternative funding options.  Participants should consult the  documents
governing  their plan and the person who administers the plan for information as
to such investment alternatives.
 
    With respect to these restrictions on withdrawals from the Variable Account,
the Company is relying upon a no-action letter dated November 28, 1988 from  the
staff  of the Securities and Exchange Commission to the American Council of Life
Insurance, the requirements for which have been complied with by the Company.
 
    For information on the  federal income tax withholding  rules that apply  to
distributions  from Qualified Contracts (including Section 403(b) Annuities) see
"Federal Tax Status".
 
                                       20
<PAGE>
MARKET VALUE ADJUSTMENT
 
    Any cash withdrawal of a Guarantee Amount, other than a withdrawal effective
within 30 days prior  to the Expiration  Date of the  Guarantee Amount, will  be
subject  to  a Market  Value Adjustment  ("MVA")  (for this  purpose, transfers,
distributions on the death of a  Participant and amounts applied to purchase  an
annuity  are treated as cash withdrawals). The MVA will be applied to the amount
being withdrawn  after  deduction  of  any applicable  Account  Fee  and  before
deduction of any applicable withdrawal charge.
 
    The  MVA will reflect the relationship  between the Current Rate (as defined
below) for the Guarantee Amount being withdrawn and the Guaranteed Interest Rate
applicable to the amount being withdrawn. It also reflects the time remaining in
the applicable Guarantee Period. If  the applicable Guaranteed Interest Rate  is
more  than .50% higher  than the Current  Rate, the application  of the MVA will
result in a higher  payment upon withdrawal. Otherwise,  the application of  the
MVA will result in a lower payment upon withdrawal.
 
    The  Market  Value  Adjustment  is  determined  by  the  application  of the
following formula:
 
     1 + I        N/12
 ( -----------)
  1 + J + .005               - 1
 
where,
 
    I is the  Guaranteed Interest Rate  being credited to  the Guarantee  Amount
subject to the Market Value Adjustment,
 
    J  is  the Guaranteed  Interest  Rate declared  by  the Company,  as  of the
effective date of the  application of the Market  Value Adjustment, for  current
allocations to Guarantee Periods equal to the balance of the Guarantee Period of
the Guarantee Amount subject to the Market Value Adjustment, rounded to the next
higher number of complete years (the "Current Rate"), and
 
    N  is the number of complete months remaining in the Guarantee Period of the
Guarantee Amount subject to the Market Value Adjustment.
 
    See Appendix  C  for  examples  of  the  application  of  the  Market  Value
Adjustment.
 
                                 DEATH BENEFIT
 
DEATH BENEFIT PROVIDED BY THE CONTRACT
 
    In the event of the death of the Annuitant prior to the Annuity Commencement
Date,  the Company will pay  a death benefit to the  Beneficiary. If there is no
designated Beneficiary living on the date of death of the Annuitant, the Company
will, upon  receipt  of  Due Proof  of  Death  of both  the  Annuitant  and  the
designated  Beneficiary, pay the death benefit in one sum to the Participant or,
if   the   Annuitant   was   the    Participant,   to   the   estate   of    the
Participant/Annuitant.  If the  death of  the Annuitant  occurs on  or after the
Annuity Commencement Date, no death benefit  will be payable under the  Contract
except as may be provided under the Annuity Option elected.
 
ELECTION AND EFFECTIVE DATE OF ELECTION
 
    During  the lifetime of the Annuitant  and prior to the Annuity Commencement
Date, the Participant may elect to have  the death benefit applied under one  or
more  Annuity  Options to  effect a  Variable Annuity  or a  Fixed Annuity  or a
combination of  both  for  the Beneficiary  as  Payee  after the  death  of  the
Annuitant.  If no election of a method of settlement of the death benefit by the
Participant is in effect on the date of death of the Annuitant, the  Beneficiary
may elect (a) to receive the death benefit in the form of a single cash payment;
or  (b) to  have the  death benefit  applied under  one or  more of  the Annuity
Options (on  the Annuity  Commencement Date  described under  "Payment of  Death
Benefit")  to effect a Variable  Annuity or a Fixed  Annuity or a combination of
both for the Beneficiary as Payee.  Either election described above may be  made
by  filing with the Company  a written election in such  form as the Company may
require. Any election  of a method  of settlement  of the death  benefit by  the
Participant will become effective on the date it is received by the Company. For
the  purposes  of the  Payment  of Death  Benefit  and Amount  of  Death Benefit
sections below, any election of the method of settlement of the death benefit by
the Participant which is in effect on
 
                                       21
<PAGE>
the date of  death of the  Annuitant will be  deemed effective on  the date  Due
Proof  of Death of the  Annuitant is received by the  Company. Any election of a
method of  settlement  of the  death  benefit  by the  Beneficiary  will  become
effective on the later of: (a) the date the election is received by the Company;
or  (b) the  date due proof  of the  death of the  Annuitant is  received by the
Company. If an election by the Beneficiary is not received by the Company within
60 days following the date due proof  of the death of the Annuitant is  received
by the Company, the Beneficiary will be deemed to have elected a cash payment as
of the last day of the 60 day period.
 
    In  all cases, no  Participant or Beneficiary shall  be entitled to exercise
any rights  that would  adversely affect  the treatment  of the  Contract as  an
annuity  contract  under  the  Internal  Revenue  Code  (see  "Other Contractual
Provisions -- Death of Participant").
 
PAYMENT OF DEATH BENEFIT
 
    If the death benefit is to be paid in cash to the Beneficiary, payment  will
be  made within  seven days  of the  date the  election becomes  effective or is
deemed to become effective, except as the Company may be permitted to defer  any
such payment of amounts derived from the Variable Account in accordance with the
Investment Company Act of 1940. If the death benefit is to be paid in one sum to
the  Participant or, if the Annuitant was  the Participant, to the estate of the
deceased Participant/Annuitant, payment will  be made within  seven days of  the
date  due  proof of  the  death of  the  Annuitant, the  Participant  and/or the
designated Beneficiary, as applicable, is received by the Company. If settlement
under one or  more of the  Annuity Options is  elected the Annuity  Commencement
Date  will be the first day of the second calendar month following the effective
date or the deemed effective date of the election, and the Participant's Account
will be maintained in effect until the Annuity Commencement Date.
 
AMOUNT OF DEATH BENEFIT
 
    The death benefit is determined as of the effective date or deemed effective
date of the  death benefit  election and  is equal to  the greatest  of (1)  the
Participant's  Account Value  for the  Valuation Period  during which  the death
benefit election is effective or is deemed to become effective; (2) the Purchase
Payment made with  respect to the  Participant's Account, minus  the sum of  all
partial withdrawals; (3) the amount that would have been payable in the event of
a  full surrender  of the  Participant's Account on  the date  the death benefit
election is effective or is deemed  to become effective; and (unless  prohibited
by  applicable state law) (4) the Participant's  Account Value on the Seven Year
Anniversary immediately  preceding  the  date  the  death  benefit  election  is
effective  or is deemed to become effective, adjusted for any subsequent partial
withdrawals.
 
                     HOW THE CONTRACT CHARGES ARE ASSESSED
 
    As more fully described  below, charges under the  Contract offered by  this
Prospectus  are assessed  in three  ways: (1)  as deductions  for administrative
expenses and,  if applicable,  for premium  taxes; (2)  as charges  against  the
assets of the Variable Account for the assumption of mortality and expense risks
and  distribution  expense charges;  and (3)  as withdrawal  charges (contingent
deferred sales  charges). In  addition,  certain deductions  are made  from  the
assets  of the  Series Fund for  investment management fees  and expenses. These
fees and expenses are described in the Series Fund's Prospectus and Statement of
Additional Information.
 
ACCOUNT FEE
 
    Each year  on  the  Account  Anniversary,  the  Company  deducts  from  each
Participant's Account an annual account administration fee ("Account Fee") equal
to  the lesser of $30 and 2% of  the Participant's Account Value to reimburse it
for administrative  expenses  relating  to  the issue  and  maintenance  of  the
Contract,  the Certificate and  the Participant's Account.  If the Participant's
Account is surrendered for its full value on other than the Account Anniversary,
the Account Fee  will be deducted  in full at  the time of  such surrender.  The
Account  Fee will be deducted on a pro rata basis from amounts allocated to each
Guarantee Period  and each  Sub-Account in  which the  Participant's Account  is
invested  at the time of  such deduction. On the  Annuity Commencement Date, the
value of the Participant's Account will be reduced by a proportionate amount  of
the Account Fee to reflect the time elapsed between the last Account Anniversary
and the day
 
                                       22
<PAGE>
before  the  Annuity  Commencement  Date. After  the  Annuity  Commencement, the
Account Fee will be deducted in equal amounts from each variable annuity payment
made during the year. No deduction will be made from fixed annuity payments.
 
    The Contract provides that the Company  may modify the Account Fee  provided
that  such modification shall apply only  with respect to Participant's Accounts
established after the effective date of such modification (See  "Modification").
The Company does not expect to make a profit from the Account Fee.
 
PREMIUM TAXES
 
   
    A  deduction, when applicable, is made for premium or similar state or local
taxes (See Appendix B). It is currently the policy of the Company to deduct  the
tax  from the amount applied to provide  an annuity at the time annuity payments
commence; however, the  Company reserves the  right to deduct  such taxes on  or
after the date they are incurred.
    
 
CHARGES AGAINST THE VARIABLE ACCOUNT FOR MORTALITY AND EXPENSE RISKS AND
DISTRIBUTION EXPENSE CHARGES
 
    The  mortality  risk  assumed by  the  Company arises  from  the contractual
obligation to continue to make annuity payments to each Annuitant regardless  of
how  long the  Annuitant lives and  regardless of  how long all  annuitants as a
group live. This  assures each annuitant  that neither the  longevity of  fellow
annuitants  nor an  improvement in  the life  expectancy generally  will have an
adverse effect on the amount of any annuity payment received under the Contract.
The Company assumes this mortality risk by virtue of annuity rates  incorporated
into  the Contract which cannot be  changed except with respect to Participant's
Accounts established after the effective date of such change, as provided in the
section of this Prospectus entitled "Modification". The expense risk assumed  by
the  Company  is the  risk that  the administrative  charges assessed  under the
Contract may be insufficient to  cover the actual total administrative  expenses
incurred by the Company.
 
    For  assuming these risks,  the Company makes a  deduction from the Variable
Account at the end of each Valuation Period during both the Accumulation  Period
and  after annuity payments begin  at an effective annual  rate of 1.25%. If the
deduction is insufficient to cover the actual cost of the mortality and  expense
risk  undertaking, the Company will bear  the loss. Conversely, if the deduction
proves more than sufficient, the excess will be profit to the Company and  would
be  available for  any proper corporate  purpose including,  among other things,
payment of distribution  expenses. The  Company will recoup  its expected  costs
associated  with registering and distributing the Contracts by the assessment of
the withdrawal charges (contingent deferred sales charges) and the  distribution
expense charge described below. However, the withdrawal charges and distribution
expense  charges  may  prove to  be  insufficient to  cover  actual distribution
expenses. If this is  the case, the  deficiency will be  met from the  Company's
general corporate funds which may include amounts derived from the mortality and
expense risk charges.
 
    The  Company assumes  the risk  that withdrawal  charges assessed  under the
Contracts may  be  insufficient to  compensate  the  Company for  the  costs  of
distributing the Contracts. For assuming such risk the Company makes a deduction
from  the Variable  Account at the  end of  each Valuation Period  for the first
seven Account Years  (during both  the accumulation period  and, if  applicable,
after annuity payments begin) at an effective annual rate of 0.15% (the staff of
the  Securities  and  Exchange Commission  deems  this charge  a  deferred sales
charge). No deduction  is made  after the  seventh Account  Anniversary. If  the
distribution  expense charge is  insufficient to cover  the actual risk assumed,
the Company will bear the loss; however, if the charge is more than  sufficient,
any  excess will be profit to the Company  and would be available for any proper
corporate purpose. In  no event will  the distribution expense  charges and  the
withdrawal  charges assessed  against a Participant's  Account exceed  9% of the
Purchase Payment.
 
                                       23
<PAGE>
   
    The  Contract provides that the Company may modify the mortality and expense
risk and distribution  expense charges; however,  such modification shall  apply
only with respect to Participant's Accounts established after the effective date
of such modification (See "Modification"). For the year ended December 31, 1996,
mortality  and  expense  risk and  distribution  expense charges  were  the only
expenses of the Variable Account.
    
 
WITHDRAWAL CHARGES
 
    No deduction for sales charges is  made from a Purchase Payment. However,  a
withdrawal  charge (contingent  deferred sales  charge) of  up to  6% of certain
amounts withdrawn,  when applicable,  will  be used  to cover  certain  expenses
relating  to the  sale of  the Contract  and Certificates  thereunder, including
commissions  paid  to  sales  personnel,  the  costs  of  preparation  of  sales
literature   and  other  promotional  costs   and  acquisition  expenses.  Gross
commissions paid on the sale of these  Contracts are not more than 6.86% of  the
Purchase Payment (See "Cash Withdrawals" and "Withdrawal Charges").
 
                               ANNUITY PROVISIONS
 
ANNUITY COMMENCEMENT DATE
 
    Annuity  payments  will  begin on  the  Annuity Commencement  Date  which is
selected by the Participant, as specified in the Application. The date  selected
by  the Participant may not be sooner than  the first day of the second calendar
month following  the  Date  of  Coverage.  This  date  may  be  changed  by  the
Participant  from time to time  by written notice to  the Company, provided that
notice of each change is received by the  Company at least 30 days prior to  the
then  current Annuity Commencement Date and the new Annuity Commencement Date is
a date which is:  (1) at least 30  days after the date  notice of the change  is
received  by the Company; (2) the  first day of a month;  and (3) not later than
the first day of the first month following the Annuitant's 85th birthday, unless
otherwise restricted, in  the case of  a Qualified Contract,  by the  particular
retirement  plan or by applicable law.  In most situations, current law requires
that the Annuity Commencement Date under  a Qualified Contract be no later  than
April  1 following the year  the Annuitant reaches age 70  1/2, and the terms of
the particular retirement  plan may impose  additional limitations. The  Annuity
Commencement  Date may also  be changed by  an election of  an Annuity Option as
described in the Death Benefit section of this Prospectus.
 
    On the Annuity Commencement Date the Participant's Account will be cancelled
and its adjusted value will be applied  to provide an annuity under one or  more
of  the  options described  below.  No withdrawal  charge  will be  imposed upon
amounts applied to purchase an annuity. However, the Market Value Adjustment may
apply, as noted under  "Determination of Amount." NO  PAYMENTS MAY BE  REQUESTED
UNDER  THE  CONTRACT'S  CASH  WITHDRAWAL  PROVISIONS  ON  OR  AFTER  THE ANNUITY
COMMENCEMENT DATE, AND  NO CASH WITHDRAWAL  WILL BE PERMITTED  EXCEPT AS MAY  BE
AVAILABLE UNDER THE ANNUITY OPTION ELECTED.
 
    Since  the Contracts offered by this  Prospectus may be issued in connection
with retirement plans which meet the requirements of Section 401, 403 or 408  of
the  Internal Revenue  Code, as well  as certain  non-qualified plans, reference
should be  made to  the terms  of the  particular plan  for any  limitations  or
restrictions on the Annuity Commencement Date.
 
ELECTION--CHANGE OF ANNUITY OPTION
 
    During  the lifetime of the Annuitant  and prior to the Annuity Commencement
Date, the Participant  may elect one  or more of  the Annuity Options  described
below,  or such other settlement option as may  be agreed to by the Company, for
the Annuitant  as Payee.  The  Participant may  also  change any  election,  but
written  notice of any  election or change  of election must  be received by the
Company at least 30 days prior to the Annuity Commencement Date. If no  election
is  in effect on  the 30th day  prior to the  Annuity Commencement Date, Annuity
Option B, for a Life Annuity with  120 monthly payments certain, will be  deemed
to  have been elected. If there is no  election of a sole Annuitant in effect on
the 30th day prior  to the Annuity Commencement  Date, the person designated  as
"Co-Annuitant" will be the Payee under the applicable Annuity Option.
 
    Any  election  may  specify the  proportion  of  the adjusted  value  of the
Participant's Account to be  applied to provide a  Fixed Annuity and a  Variable
Annuity.   In  the  event   the  election  does   not  so  specify,   or  if  no
 
                                       24
<PAGE>
election is in effect on  the 30th day prior  to the Annuity Commencement  Date,
then  the  portion of  the adjusted  value  of the  Participant's Account  to be
applied to provide a Fixed Annuity and a Variable Annuity will be determined  on
a  pro  rata basis  from the  composition  of the  Participant's Account  on the
Annuity Commencement Date.
 
    Annuity Options may also be elected by the Participant or the Beneficiary as
provided in the Death Benefit section of this Prospectus.
 
    Reference should be made  to the terms of  a particular retirement plan  and
any  applicable legislation for  any limitations or  restrictions on the options
which may be elected.
 
    NO CHANGE  OF ANNUITY  OPTION IS  PERMITTED AFTER  THE ANNUITY  COMMENCEMENT
DATE.
 
ANNUITY OPTIONS
 
    No  lump  sum  settlement  option  is  available  under  the  Contract.  The
Participant may surrender a Certificate prior to the Annuity Commencement  Date;
however,  any  applicable  surrender  charge  will  be  deducted  from  the cash
withdrawal payment  and  a  Market  Value Adjustment,  if  applicable,  will  be
applied.
 
    Annuity  Options  A, B,  C and  D are  available to  provide either  a Fixed
Annuity or a Variable Annuity. Annuity Option  E is available only to provide  a
Fixed Annuity.
 
    Annuity  Option A.  Life  Annuity:  Monthly payments  during the lifetime of
the Payee. This option  offers a higher level  of monthly payments than  Annuity
Options  B or C because  no further payments are payable  after the death of the
Payee and there is no provision for a death benefit payable to a Beneficiary.
 
    Annuity Option B.  Life  Annuity with 60, 120,  180 or 240 Monthly  Payments
Certain:  Monthly payments during the lifetime of the Payee and in any event for
60,  120, 180 or 240 months certain as  elected. The election of a longer period
certain results in smaller monthly payments than would be the case if a  shorter
period  certain were elected. In the event of  the death of the Payee under this
option, the  Contract  provides  that  if there  is  no  designated  beneficiary
entitled  to the  remaining payments  then living,  the discounted  value of the
remaining payments,  if any,  will be  calculated and  paid in  one sum  to  the
deceased  Payee's estate. In  addition, any beneficiary  who becomes entitled to
any remaining payments under  this option may elect  to receive the amounts  due
under this option in one sum. The discounted value for variable annuity payments
will  be based on interest  compounded annually at the  assumed interest rate of
4%. The discounted value for payments being made on a fixed basis will be  based
on  the interest rate initially  used by the Company  to determine the amount of
each payment.
 
    Annuity Option C.   Joint and  Survivor Annuity:   Monthly payments  payable
during the joint lifetime of the Payee and a designated second person and during
the  lifetime of  the survivor.  During the  lifetime of  the survivor, variable
monthly payments, if any, will be determined using the percentage chosen at  the
time  of election  of this  option of the  number of  each type  of Annuity Unit
credited to the Contract with respect  to the Payee and fixed monthly  payments,
if  any,  will be  equal to  the same  percentage of  the fixed  monthly payment
payable during the joint lifetime of the Payee and the designated second person.
 
    *  Annuity   Option  D.      Monthly  Payments   for  a   Specified   Period
Certain:   Monthly payments for  a specified period of  time, as elected. In the
event of the death of the Payee  under this option, the Contract provides  that,
as  described  under  Annuity  Option  B  above,  in  certain  circumstances the
discounted value of the remaining payments, if any, will be calculated and  paid
in one sum.
 
    *  Annuity Option E.   Fixed Payments:  The  amount applied to provide fixed
payments in accordance with this option will be held by the Company at interest.
Fixed payments will be made in such amounts  and at such times as may be  agreed
upon  with the Company  and will continue  until the amount  held by the Company
with interest is exhausted. The final payment will be for the balance  remaining
and  may be  less than the  amount of  each preceding payment.  Interest will be
credited yearly  on  the  amount remaining  unpaid  at  a rate  which  shall  be
determined  by  the  Company from  time  to time  but  which shall  not  be less
 
- ------------------------
* The election of this annuity option may result in the imposition of a penalty
tax.
 
                                       25
<PAGE>
than 4% per year, compounded annually. The rate so determined may be changed  at
any  time and as often  as may be determined  by the Company, provided, however,
that the rate may not be reduced more frequently than once during each  calendar
year.
 
DETERMINATION OF ANNUITY PAYMENTS
 
    On the Annuity Commencement Date the Participant's Account will be cancelled
and  its adjusted value will be applied to provide a Variable Annuity or a Fixed
Annuity or  a combination  of both.  The adjusted  value will  be equal  to  the
Participant's  Account  Value at  the  end of  the  Valuation Period  which ends
immediately preceding the Annuity Commencement Date, reduced by a  proportionate
amount  of the Account Fee to reflect  the time elapsed between the last Account
Anniversary and the day before the Annuity Commencement Date, plus or minus  any
applicable  Market Value Adjustment and minus  any applicable premium or similar
taxes.
 
    If the amount to be applied under any annuity option is less than $2,000, or
if the first annuity payment payable in accordance with such option is less than
$20, the Company will pay  the amount to be applied  in a single payment to  the
Payee.
 
FIXED ANNUITY PAYMENTS
 
    The  dollar  amount of  each  fixed annuity  payment  will be  determined in
accordance with the Annuity Payment Rates found in the Contract which are  based
on  a minimum guaranteed interest rate of 4%  per year, or, if more favorable to
the Payee(s), in  accordance with  the Annuity  Payment Rates  published by  the
Company and in use on the Annuity Commencement Date.
 
VARIABLE ANNUITY PAYMENTS
 
    The  dollar amount of the first  variable annuity payment will be determined
in accordance with  the Annuity Payment  Rates found in  the Contract which  are
based on an assumed interest rate of 4% per year, unless these rates are changed
(See  "Modification"). All  variable annuity payments  other than  the first are
determined by means of  Annuity Units credited to  the Contract with respect  to
the particular Payee. The number of Annuity Units to be credited in respect of a
particular  Sub-Account  is determined  by dividing  that  portion of  the first
variable annuity payment attributable  to that Sub-Account  by the Annuity  Unit
value  of  that  Sub-Account at  the  end  of the  Valuation  Period  which ends
immediately preceding the Annuity Commencement Date. The number of Annuity Units
of each particular  Sub-Account credited  with respect to  the particular  Payee
then  remains fixed  unless an  exchange of Annuity  Units is  made as described
below. The dollar amount  of each variable annuity  payment after the first  may
increase,  decrease or remain constant,  and is equal to  the sum of the amounts
determined  by  multiplying  the  number  of  Annuity  Units  of  a   particular
Sub-Account  credited with respect  to the particular Payee  by the Annuity Unit
value for  the  particular  Sub-Account  for the  Valuation  Period  which  ends
immediately  preceding  the due  date  of each  subsequent  payment. If  the net
investment return on  the assets  of the  Variable Account  is the  same as  the
assumed  interest rate  of 4%  per year,  variable annuity  payments will remain
level. If the net investment return  exceeds the assumed interest rate  variable
annuity  payments will increase and, conversely, if  it is less than the assumed
interest rate the payments will decrease.
 
    For a hypothetical example of the calculation of a Variable Annuity Payment,
see Appendix A.
 
VARIABLE ANNUITY UNIT VALUE
 
    The Annuity Unit value  for each Sub-Account was  established at $10.00  for
the first Valuation Period of the particular Sub-Account. The Annuity Unit Value
for the particular Sub-Account for any subsequent Valuation Period is determined
by  multiplying the  Annuity Unit value  for the particular  Sub-Account for the
immediately preceding  Valuation  Period  by  the  Net  Investment  Factor  (See
"Variable  Accumulation  Value,  Net  Investment  Factor")  for  the  particular
Sub-Account for the current Valuation  Period and then multiplying that  product
by  a factor  to neutralize  the assumed interest  rate of  4% per  year used to
establish the  Annuity  Payment Rates  found  in  the Contract.  The  factor  is
0.99989255 for a one day Valuation Period.
 
    For  a hypothetical example  of the calculation  of the value  of a Variable
Annuity Unit, see Appendix A.
 
                                       26
<PAGE>
EXCHANGE OF VARIABLE ANNUITY UNITS
 
    After the  Annuity Commencement  Date the  Payee may,  by filing  a  written
request  with the Company, exchange the value  of a designated number of Annuity
Units of particular Sub-Accounts  then credited with  respect to the  particular
Payee into other Annuity Units, the value of which would be such that the dollar
amount  of  an  annuity  payment made  on  the  date of  the  exchange  would be
unaffected by the fact of the exchange.  No more than twelve (12) exchanges  may
be made within each Account Year.
 
    Exchanges  may be  made only  between Sub-Accounts.  Exchanges will  be made
using the Annuity Unit values for the Valuation Period during which any  request
for exchange is received by the Company.
 
ANNUITY PAYMENT RATES
 
    The  Contract  contains  Annuity  Payment  Rates  for  each  Annuity  Option
described in  this Prospectus.  The rates  show, for  each $1,000  applied,  the
dollar  amount of: (a) the  first monthly variable annuity  payment based on the
assumed interest rate  of 4%; and  (b) the monthly  fixed annuity payment,  when
this  payment is based on  the minimum guaranteed interest  rate of 4% per year.
These rates may be changed by the Company with respect to Participant's Accounts
established after the effective date of such change (See "Modification").
 
    The annuity payment rates may vary  according to the Annuity Option  elected
and  the adjusted age  of the Payee.  The Contract also  describes the method of
determining the  adjusted  age  of  the  Payee.  The  mortality  table  used  in
determining  the  annuity payment  rates  for Options  A, B  and  C is  the 1983
Individual Annuitant Mortality Table.
 
                          OTHER CONTRACTUAL PROVISIONS
 
PAYMENT LIMITS
 
    Only one Purchase Payment may be  made per Certificate. The single  Purchase
Payment  credited  to each  Participant's Account  must be  at least  $5,000. In
addition, the prior approval of the Company is required before it will accept  a
Purchase Payment in excess of $1,000,000.
 
DESIGNATION AND CHANGE OF BENEFICIARY
 
    The  beneficiary  designation contained  in the  Application will  remain in
effect until  changed.  The  interest  of any  Beneficiary  is  subject  to  the
particular  Beneficiary  surviving the  Annuitant  and, in  the  case of  a Non-
Qualified Contract, the Participant as well.
 
    Subject  to  the  rights  of  an  irrevocably  designated  Beneficiary,  the
Participant  may change or revoke  the designation of a  Beneficiary at any time
while the Annuitant is living by  filing with the Company a written  beneficiary
designation or revocation in such form as the Company may require. The change or
revocation  will not  be binding upon  the Company  until it is  received by the
Company. When it is so received the change or revocation will be effective as of
the date on which the beneficiary designation or revocation was signed, but  the
change  or revocation will be without prejudice to the Company on account of any
payment made or any action taken by the Company prior to receiving the change or
revocation.
 
    Reference should be made  to the terms of  a particular retirement plan  and
any applicable legislation for any restrictions on the beneficiary designation.
 
EXERCISE OF CONTRACT RIGHTS
 
    The  Contract shall belong to the  Owner. All Contract rights and privileges
may be expressly reserved by the Owner, failing which, each Participant shall be
entitled to  exercise  such  rights  and  privileges  in  connection  with  such
Participant's  Certificate.  In  any case,  such  rights and  privileges  can be
exercised without  the consent  of the  Beneficiary (other  than an  irrevocably
designated  Beneficiary) or any other person.  Such rights and privileges may be
exercised only during  the lifetime of  the Annuitant and  prior to the  Annuity
Commencement Date, except as otherwise provided in the Contract.
 
    The  Annuitant becomes the Payee on and after the Annuity Commencement Date.
The Beneficiary becomes the Payee on the death of the Annuitant. Such Payees may
thereafter exercise  such rights  and  privileges, if  any, of  ownership  which
continue.
 
                                       27
<PAGE>
CHANGE OF OWNERSHIP
 
    Ownership  of a Qualified Contract may not be transferred except to: (1) the
Annuitant; (2) a  trustee or successor  trustee of a  pension or profit  sharing
trust which is qualified under Section 401 of the Internal Revenue Code; (3) the
employer of the Annuitant provided that the Qualified Contract after transfer is
maintained  under the terms of a  retirement plan qualified under Section 403(a)
of the Internal Revenue Code for the  benefit of the Annuitant; (4) the  trustee
of  an individual  retirement account  plan qualified  under Section  408 of the
Internal Revenue  Code  for  the benefit  of  the  Owner; or  (5)  as  otherwise
permitted  from time to time by laws and regulations governing the retirement or
deferred compensation  plans  for which  a  Qualified Contract  may  be  issued.
Subject  to  the foregoing,  a  Qualified Contract  may  not be  sold, assigned,
transferred, discounted or pledged as collateral  for a loan or as security  for
the  performance of an obligation  or for any other  purpose to any person other
than the Company.
 
    The Owner  of a  Non-Qualified  Contract may  change  the ownership  of  the
Contract  during the  lifetime of  any Annuitant and  prior to  the last Annuity
Commencement Date;  and  each  Participant,  in  like  manner,  may  change  the
ownership  interest in a Contract evidenced by that Participant's Certificate. A
change of  ownership  will  not  be  binding  upon  the  Company  until  written
notification  is received by the Company. When such notification is so received,
the change will be effective as of the date on which the request for change  was
signed  by the  Owner or  Participant, as  appropriate, but  the change  will be
without prejudice to the Company  on account of any  payment made or any  action
taken by the Company prior to receiving the change.
 
DEATH OF PARTICIPANT
 
    If  a Participant under a Non-Qualified Contract dies prior to the Annuitant
and before the Annuity Commencement Date, the Participant's Account Value,  plus
or  minus any  applicable Market  Value Adjustment,  must be  distributed to the
Beneficiary, if then alive, either (1) within five years after the date of death
of the  Participant, or  (2)  over some  period not  greater  than the  life  or
expected  life of  the Beneficiary, with  annuity payments  beginning within one
year after  the date  of  death of  the Participant.  The  person named  as  the
Participant's Beneficiary shall be considered the designated beneficiary for the
purposes  of Section 72(s)  of the Internal  Revenue Code and  if no person then
living has  been  so  named,  then the  Annuitant  shall  automatically  be  the
designated beneficiary for this purpose.
 
    These mandatory distribution requirements will not apply when the designated
beneficiary  is the spouse of the Participant,  if the spouse elects to continue
the Certificate in the spouse's own  name, as Participant. When the  Participant
was also the Annuitant, the surviving spouse (if the designated beneficiary) may
elect   to  be  named  as  both  Participant  and  Annuitant  and  continue  the
Certificate, but if that  election is not made,  the Death Benefit provision  of
the Contract shall then be controlling. In all other cases where the Participant
and  the Annuitant are the  same individual, the Death  Benefit provision of the
Contract controls.
 
    If the Payee dies on or after  the Annuity Commencement Date and before  the
entire  accumulation under such Participant's  Account has been distributed, the
remaining portion of such Participant's Account, if any, must be distributed  at
least as rapidly as the method of distribution then in effect.
 
    In  all cases, no  Participant or Beneficiary shall  be entitled to exercise
any rights  that would  adversely affect  the treatment  of the  Contract as  an
annuity contract under the Internal Revenue Code.
 
    Any distributions upon the death of a Participant under a Qualified Contract
will  be subject to the laws and regulations governing the particular retirement
or deferred compensation plan  in connection with  which the Qualified  Contract
was issued.
 
VOTING OF SERIES FUND SHARES
 
    The  Company  will  vote Series  Fund  shares  held by  the  Sub-Accounts at
meetings of shareholders of the Series Fund, but will follow voting instructions
received from persons having the right to give voting instructions. The Owner or
Participant is the person having the right to give voting instructions prior  to
the  Annuity Commencement  Date. On or  after the Annuity  Commencement Date the
Payee is the person  having such voting rights.  Any shares attributable to  the
Company  and  Series Fund  shares for  which no  timely voting  instructions are
received will be voted by the Company  in the same proportion as the shares  for
which instructions are received from Owners, Participants and Payees.
 
                                       28
<PAGE>
    Owners  of Qualified Contracts may be  subject to other voting provisions of
the particular plan  and of the  Investment Company Act  of 1940. Employees  who
contribute  to  plans which  are  funded by  the  Contracts may  be  entitled to
instruct the Owners as to  how to instruct the Company  to vote the Series  Fund
shares  attributable to  their contributions.  Such plans  may also  provide the
additional extent, if any, to which the Owners shall follow voting  instructions
of  persons with rights under the plans.  If no voting instructions are received
from any such  person with respect  to a particular  Participant's Account,  the
Owner  may instruct  the Company  as to how  to vote  the number  of Series Fund
shares for which instructions may be given.
 
    Neither the Variable Account  nor the Company is  under any duty to  provide
information  concerning the  voting instruction rights  of persons  who may have
such rights under plans,  other than rights afforded  by the Investment  Company
Act  of 1940,  nor any duty  to inquire as  to the instructions  received or the
authority of Owners  or others  to instruct the  voting of  Series Fund  shares.
Except  as  the Variable  Account or  the  Company has  actual knowledge  to the
contrary, the instructions  given by  Owners and Payees  will be  valid as  they
affect   the  Variable  Account,  the  Company  and  any  others  having  voting
instruction rights with respect to the Variable Account.
 
    All Fund proxy  material, together with  an appropriate form  to be used  to
give  voting instructions, will be  provided to each person  having the right to
give voting  instructions  at  least ten  days  prior  to each  meeting  of  the
shareholders  of the Series Fund.  The number of Series  Fund shares as to which
each such person  is entitled  to give instructions  will be  determined by  the
Company on a date not more than 90 days prior to each such meeting. Prior to the
Annuity  Commencement Date, the number of Series  Fund shares as to which voting
instructions may be given to the Company is determined by dividing the value  of
all of the Variable Accumulation Units of the particular Sub-Account credited to
the  Participant's Account by the net asset value of one Series Fund share as of
the same date. On or after the  Annuity Commencement Date, the number of  Series
Fund  shares as to which such instructions may be given by a Payee is determined
by dividing the reserve held by the  Company in the Sub-Account with respect  to
the  particular Payee by  the net asset value  of a Series Fund  share as of the
same date. After the Annuity Commencement Date, the number of Series Fund shares
as to  which a  Payee is  entitled to  give voting  instructions will  generally
decrease due to the decrease in the reserve.
 
PERIODIC REPORTS
 
    During  the Accumulation  Period the Company  will send  the Participant, or
such other person having voting rights, at least once during each Account  Year,
a statement showing the number, type and value of Accumulation Units credited to
the  Participant's Account  and the  Fixed Accumulation  Value of  such account,
which statement shall be accurate as of a date not more than two months previous
to the date  of mailing.  In addition, every  person having  voting rights  will
receive  such reports  or prospectuses concerning  the Variable  Account and the
Series Fund as may  be required by  the Investment Company Act  of 1940 and  the
Securities  Act of 1933.  The Company will also  send such statements reflecting
transactions in the Participant's Account as may be required by applicable laws,
rules and regulations.
 
    Upon request,  the Company  will provide  the Participant  with  information
regarding fixed and variable accumulation values.
 
SUBSTITUTED SECURITIES
 
    Shares  of any or all Series of the  Series Fund may not always be available
for purchase by  the Sub-Accounts  of the Variable  Account or  the Company  may
decide  that further investment in  any such shares is  no longer appropriate in
view of the purposes of the Variable Account. In either event, shares of another
registered  open-end  investment  company  or  unit  investment  trust  may   be
substituted  both  for  Series Fund  shares  already purchased  by  the Variable
Account and/or as the security to be purchased in the future provided that these
substitutions have been approved by  the Securities and Exchange Commission.  In
the  event of any substitution pursuant to  this provision, the Company may make
appropriate endorsement to the Contract to reflect the substitution.
 
CHANGE IN OPERATION OF VARIABLE ACCOUNT
 
    At the  Company's election  and subject  to any  necessary vote  by  persons
having  the right to give instructions with respect to the voting of Series Fund
shares held by the Sub-Accounts, the Variable Account
 
                                       29
<PAGE>
may be operated as a management company under the Investment Company Act of 1940
or it may be deregistered under the Investment Company Act of 1940 in the  event
registration  is  no longer  required.  Deregistration of  the  Variable Account
requires an order by the Securities and Exchange Commission. In the event of any
change in the operation of the Variable Account pursuant to this provision,  the
Company  may make appropriate endorsement to  the Contract to reflect the change
and take such other  action as may  be necessary and  appropriate to effect  the
change.
 
SPLITTING UNITS
 
    The  Company reserves the  right to split  or combine the  value of Variable
Accumulation Units, Annuity Units or any  of them. In effecting any such  change
of  unit  values, strict  equity will  be preserved  and no  change will  have a
material effect on the benefits or other provisions of the Contract.
 
MODIFICATION
 
    Upon notice to  the Owner  and Participant(s)  (or the  Payee(s) during  the
annuity   period),  the  Contract  may  be  modified  by  the  Company  if  such
modification: (i) is  necessary to  make the  Contract or  the Variable  Account
comply  with any law or regulation issued  by a governmental agency to which the
Company or  the Variable  Account is  subject; or  (ii) is  necessary to  assure
continued qualification of the Contract under the Internal Revenue Code or other
federal  or state laws relating to retirement annuities or annuity contracts; or
(iii) is necessary to reflect a change in the operation of the Variable  Account
or  the Sub-Account(s) (See "Change in  Operation of Variable Account"); or (iv)
provides additional Variable Account and/or  fixed accumulation options. In  the
event  of any such modification, the Company may make appropriate endorsement in
the Contract to reflect such modification.
 
    In addition, upon notice to  the Owner the Contract  may be modified by  the
Company  to change the  withdrawal charges, Account  Fees, mortality and expense
risk charges, distribution expense charges,  the tables used in determining  the
amount  of the first monthly variable annuity and fixed annuity payments and the
formula used  to  calculate the  Market  Value Adjustment,  provided  that  such
modification  shall apply only  to Participant's Accounts  established after the
effective date  of such  modification.  In order  to exercise  its  modification
rights  in these particular instances, the Company must notify the Owner of such
modification in writing.  The notice shall  specify the effective  date of  such
modification which must be at least 60 days following the date of mailing of the
notice of modification by the Company. All of the charges and the annuity tables
which are provided in the Contract prior to any such modification will remain in
effect   permanently,  unless   improved  by   the  Company,   with  respect  to
Participant's  Accounts  established  prior  to  the  effective  date  of   such
modification.
 
DISCONTINUANCE OF NEW PARTICIPANTS
 
    The Company, by giving 30 days' prior written notice to the Owner, may limit
or  discontinue  the acceptance  of  new Applications  and  the issuance  of new
Certificates under a Contract. Such  limitation or discontinuance shall have  no
effect  on  rights  or  benefits  with  respect  to  any  Participant's Accounts
established prior to the effective date of such limitation or discontinuance.
 
CUSTODIAN
 
    The Company is  the Custodian  of the assets  of the  Variable Account.  The
Company  will purchase Series Fund shares at  net asset value in connection with
amounts allocated to the Sub-Accounts in accordance with the instructions of the
Participant and redeemed Series Fund shares  at net asset value for the  purpose
of  meeting the contractual obligations of  the Variable Account, paying charges
relative to the Variable Account or making adjustments for annuity reserves held
in the Variable Account.
 
RIGHT TO RETURN
 
    If the Participant is not satisfied with the Certificate it may be  returned
by mailing it to the Company at the Annuity Service Mailing Address on the cover
of  this Prospectus within ten  days after it was  delivered to the Participant.
When the Company receives the returned Certificate it will be cancelled and  the
Participant's  Account Value at the end of the Valuation Period during which the
Certificate was received  by the Company  will be refunded  to the  Participant.
However,  if applicable state law  so requires, the full  amount of any Purchase
Payment received by the Company will be refunded, the "free look" period may  be
greater  than ten days and alternative  methods of returning the Certificate may
be acceptable.
 
                                       30
<PAGE>
    With  respect  to  Individual   Retirement  Accounts,  under  the   Employee
Retirement  Income Security Act of 1974  ("ERlSA") a Participant establishing an
Individual Retirement  Account must  be furnished  with a  disclosure  statement
containing   certain  information  about  the   Contract  and  applicable  legal
requirements. This  statement  must be  furnished  on  or before  the  date  the
Individual  Retirement Account is  established. If the  Participant is furnished
with such disclosure  statement before the  seventh day preceding  the date  the
Individual  Retirement Account is established, the Participant will not have any
right of revocation. If the disclosure statement is furnished after the  seventh
day  preceding the establishment of the  Individual Retirement Account, then the
Participant may give a notice  of revocation to the  Company at any time  within
seven  days after the Date  of Coverage. Upon such  revocation, the Company will
refund the Purchase  Payment made  by the  Participant. The  foregoing right  of
revocation  with respect to  an Individual Retirement Account  is in addition to
the return privilege  set forth  in the  preceding paragraph.  The Company  will
allow  a participant  establishing an Individual  Retirement Account  a "ten day
free-look," notwithstanding the provisions of ERISA.
 
                               FEDERAL TAX STATUS
 
INTRODUCTION
 
    The Contracts  and related  Certificates described  in this  Prospectus  are
designed for use by employer, association and other group retirement plans under
the  provisions of Sections 401 (including  Section 401(k)), 403, 408(b), 408(c)
and 408(k) of the Internal  Revenue Code (the "Code"),  as well as certain  non-
qualified  retirement plans, such as payroll  savings plans. The ultimate effect
of federal income taxes may  depend upon the type  of retirement plan for  which
the Contract or Certificate is purchased and a number of different factors. This
discussion  is general in  nature, is based upon  the Company's understanding of
current federal income tax laws, and is not intended as tax advice. Congress has
the power to enact legislation affecting the tax treatment of annuity contracts,
and such  legislation  could be  applied  retroactively to  Contracts  purchased
before  the  date of  enactment.  Also, because  the  Internal Revenue  Code, as
amended, is not in force in the Commonwealth of Puerto Rico, some references  in
this  discussion will  not apply to  Contracts or Certificates  issued in Puerto
Rico. Any person contemplating the purchase of a Contract or Certificate  should
consult  a  qualified  tax adviser.  THE  COMPANY  DOES NOT  MAKE  ANY GUARANTEE
REGARDING  THE  TAX  STATUS,  FEDERAL,  STATE  OR  LOCAL,  OF  ANY  CONTRACT  OR
CERTIFICATE OR ANY TRANSACTION INVOLVING THE CONTRACTS OR CERTIFICATES.
 
TAX TREATMENT OF THE COMPANY AND THE VARIABLE ACCOUNT
 
    The  Company  is taxed  as  a life  insurance  company under  the  Code. The
operations of  the Variable  Account  are accounted  for separately  from  other
operations  of  the Company  for purposes  of federal  income taxation,  but the
Variable Account is not taxable as  a regulated investment company or  otherwise
as  an entity  separate from  the Company.  The income  of the  Variable Account
(consisting primarily  of interest,  dividends  and net  capital gains)  is  not
taxable  to the Company  to the extent  that it is  applied to increase reserves
under contracts participating in the Variable Account.
 
TAXATION OF ANNUITIES IN GENERAL
 
    Purchase Payments made under Non-Qualified Contracts are not deductible from
the Participant's income  for federal  income tax  purposes. Participants  under
Qualified  Contracts should consult a tax adviser regarding the tax treatment of
Purchase Payments.
 
    Generally, no taxes are imposed on the  increase in the value of a  Contract
or Certificate until a distribution occurs, either as an annuity payment or as a
cash  withdrawal or  lump-sum payment  prior to  the Annuity  Commencement Date.
However, corporate Owners  and Participants  and other  Owners and  Participants
that  are not  natural persons  are subject  to current  taxation on  the annual
increase in the value of a Non-Qualified Contract, unless the non-natural person
holds the Contract as agent for a natural person (such as where a bank or  other
entity  holds  a Contract  as  trustee under  a  trust agreement).  This current
taxation of annuities  held by non-natural  persons does not  apply to  earnings
accumulated  under  an immediate  annuity, which  the Code  defines as  a single
premium contract with an annuity commencement  date within one year of the  date
of purchase.
 
                                       31
<PAGE>
    The Code is unclear in its application to a group annuity contract where the
Owner  is distinct from  the individuals who receive  the Contract benefits (the
Participants). The following discussion is  the Company's best understanding  of
the operation of the Code in the context of group contracts. However, Owners and
Participants should consult a qualified tax adviser.
 
    A  partial cash withdrawal  (that is, a  withdrawal of less  than the entire
Participant's Account Value)  from a  Certificate issued  under a  Non-Qualified
Contract (a "Non-Qualified Certificate") before the Annuity Commencement Date is
treated  first as  a withdrawal from  the increase in  the Participant's Account
Value, rather  than  as  a  return  of Purchase  Payments.  The  amount  of  the
withdrawal  allocable to this  increase will be  includible in the Participant's
income and  subject to  tax  at ordinary  income  rates. If  part  or all  of  a
Participant's Account Value is assigned or pledged as collateral for a loan, the
amount  assigned or  pledged must be  treated as  if it were  withdrawn from the
Certificate.
 
    In the case of annuity payments under a Non-Qualified Certificate after  the
Annuity  Commencement Date, a portion of each payment is treated as a nontaxable
return of Purchase Payments. The nontaxable portion is determined by applying to
each annuity payment an "exclusion ratio," which, in general, is the ratio  that
the  total amount the Participant paid for  the Certificate bears to the Payee's
expected return under the Certificate. The  remainder of the payment is  taxable
at ordinary income rates.
 
    The total amount that a Payee may exclude from income through application of
the  "exclusion ratio"  is limited  to the amount  the Participant  paid for the
Certificate. If the Annuitant survives for his full life expectancy, so that the
Payee recovers  the  entire amount  paid  for the  Certificate,  any  subsequent
annuity  payments will be fully taxable  as income. Conversely, if the Annuitant
dies before the Payee recovers the entire amount paid, the Payee will be allowed
a deduction for the amount of unrecovered Purchase Payments.
 
    Taxable  cash   withdrawals  and   lump-sum  payments   from   Non-Qualified
Certificates  may be subject to a penalty tax equal to 10% of the amount treated
as taxable income. This 10% penalty also may apply to certain annuity  payments.
This  penalty  will  not  apply  in certain  circumstances  (such  as  where the
distribution is made upon the death of the Participant). The withdrawal  penalty
also  does not  apply to  distributions under  an immediate  annuity (as defined
above).
 
    In the case of a Certificate issued under a Qualified Contract (a "Qualified
Certificate"), distributions generally are taxable and distributions made  prior
to  age 59 1/2 are subject to a  10% penalty tax, although this penalty tax will
not apply in  certain circumstances. Certain  distributions, known as  "eligible
rollover  distributions," if rolled  over to certain  other qualified retirement
plans (either directly or after being distributed to the Participant or  Payee),
are  not taxable until distributed from the  plan to which they are rolled over.
In general, an eligible rollover distribution is any taxable distribution  other
than  a distribution that is part of a series of payments made for life or for a
specified period of 10 years  or more. Owners, Participants, Annuitants,  Payees
and  Beneficiaries should  seek qualified advice  about the  tax consequences of
distributions, withdrawals, rollovers and payments under the retirement plans in
connection with which the Certificates are purchased.
 
    If the Participant under a Non-Qualified Certificate dies, the value of  the
Certificate  generally must be distributed within a specified period (See "Other
Contractual Provisions  --  Death  of  Participant").  For  contracts  owned  by
non-natural  persons, a change in  the Annuitant is treated  as the death of the
Participant.
 
    A purchaser of  a Qualified  Certificate should refer  to the  terms of  the
applicable  retirement  plan and  consult a  tax adviser  regarding distribution
requirements upon the death of the Participant.
 
    A transfer  of  a Non-Qualified  Certificate  by  gift (other  than  to  the
Participant's  spouse) is treated as the receipt by the Participant of income in
an amount equal to the Participant's  Account Value minus the total amount  paid
for the Certificate.
 
    The  Company will withhold  and remit to  the U.S. government  a part of the
taxable portion of each distribution  made under a Non-Qualified Certificate  or
under a Qualified Certificate issued for use with an
 
                                       32
<PAGE>
individual  retirement account unless  the Participant or  Payee provides his or
her taxpayer identification number to the  Company and notifies the Company  (in
the  manner  prescribed) before  the time  of  the distribution  that he  or she
chooses not to have any amounts withheld.
 
    In the  case  of distributions  from  a Qualified  Certificate  (other  than
distributions  from a Certificate  issued for use  with an individual retirement
account), the Company or the plan  administrator must withhold and remit to  the
U.S.   government  20%  of  each  distribution  that  is  an  eligible  rollover
distribution (as defined above) unless the Participant or Payee elects to make a
direct rollover of the distribution to another qualified retirement plan that is
eligible to receive the rollover. If a distribution from a Qualified Certificate
is not an  eligible rollover  distribution, then  the Participant  or Payee  can
choose  not  to  have  amounts withheld  as  described  above  for Non-Qualified
Certificates and individual retirement accounts.
 
    Amounts  withheld  from  any  distribution  may  be  credited  against   the
Participant's  or  Payee's federal  income  tax liability  for  the year  of the
distribution.
 
    The  Internal  Revenue  Service   has  issued  regulations  that   prescribe
investment  diversification  requirements  for  mutual  fund  series  underlying
nonqualified variable  contracts.  Contracts  that  do  not  comply  with  these
regulations  do not  qualify as annuities  for federal income  tax purposes, and
therefore the  annual increase  in the  value of  such contracts  is subject  to
current  taxation.  The Company  believes that  each series  of the  Series Fund
complies with the regulations.
 
    The preamble to the regulations states that the Internal Revenue Service may
promulgate guidelines under which a variable contract will not be treated as  an
annuity for tax purposes if the owner has excessive control over the investments
underlying  the contract. It  is not known  whether such guidelines,  if in fact
promulgated, would have retroactive effect.  If guidelines are promulgated,  the
Company  will  take  any action  (including  modification of  the  Contract, the
Certificate  and/or  the  Variable  Account)   necessary  to  comply  with   the
guidelines.
 
    THE  FOLLOWING  INFORMATION  SHOULD  BE CONSIDERED  ONLY  WHEN  AN IMMEDIATE
ANNUITY CONTRACT AND  A DEFERRED  ANNUITY CONTRACT ARE  PURCHASED TOGETHER:  The
Company   understands  that  the  Treasury  Department  is  in  the  process  of
reconsidering the tax treatment of  annuity payments under an immediate  annuity
contract (as defined above) purchased together with a deferred annuity contract.
The  Company believes that any  adverse change in the  existing tax treatment of
such immediate annuity contracts is likely to be prospective, that is, it  would
not  apply to contracts issued before such a change is announced. However, there
can be no  assurance that  any such  change, if  adopted, would  not be  applied
retroactively.
 
QUALIFIED RETIREMENT PLANS
 
    The  Qualified Contracts described  in this Prospectus  are designed for use
with several types of  qualified retirement plans. The  tax rules applicable  to
participants  in such qualified  retirement plans vary according  to the type of
plan and  its terms  and conditions.  Therefore, no  attempt is  made herein  to
provide  more than general information about  the use of the Qualified Contracts
with the various types  of qualified retirement  plans. Participants under  such
plans as well as Owners, Annuitants, Payees and Beneficiaries are cautioned that
the rights of any person to any benefits under these plans may be subject to the
terms  and  conditions of  the  plans themselves,  regardless  of the  terms and
conditions of the Qualified Contracts issued in connection therewith.  Following
are  brief descriptions of  various types of qualified  retirement plans and the
use of the Qualified Contracts in connection therewith.
 
PENSION AND PROFIT-SHARING PLANS
 
    Sections 401(a), 401(k) and 403(a) of the Code permit business employers and
certain  associations  to  establish  various  types  of  retirement  plans  for
employees.  The Tax Equity and Fiscal Responsibility Act of 1982 eliminated most
differences between  qualified retirement  plans of  corporations and  those  of
self-employed individuals. The Contract may be purchased by those who would have
been  covered under the rules governing old H.R.  10 (Keogh) Plans as well as by
corporate plans. Such retirement plans may permit the purchase of the  Qualified
Contracts  to provide benefits  under the plans. Employers  intending to use the
Qualified Contracts in connection with  such plans should seek qualified  advice
in connection therewith.
 
                                       33
<PAGE>
TAX-SHELTERED ANNUITIES
 
    Section  403(b) of the Code permits public school employees and employees of
certain types of charitable, educational and scientific organizations  specified
in  Section 501(c) (3) of the Code to purchase annuity contracts and, subject to
certain limitations, exclude the amount  of purchase payments from gross  income
for   tax  purposes.  These  annuity  contracts  are  commonly  referred  to  as
"Tax-Sheltered Annuities."  Purchasers  of  the  Qualified  Contracts  for  such
purposes  should  seek  qualified  advice  as  to  eligibility,  limitations  on
permissible amounts of Purchase Payments and tax consequences of  distributions.
Only  one Purchase Payment per Certificate will be accepted (See "Section 403(b)
Annuities").
 
INDIVIDUAL RETIREMENT ACCOUNTS
 
    Sections 219 and 408 of the  Code permit eligible individuals to  contribute
to an individual retirement program, including Simplified Employee Pension Plans
and  Employer/Association of Employees Established Individual Retirement Account
Trusts, known  as an  Individual  Retirement Account  ("IRA"). These  IRA's  are
subject  to limitations on the  amount that may be  contributed, the persons who
may be eligible, and on the  time when distributions may commence. In  addition,
certain distributions from some other types of retirement plans may be placed on
a  tax-deferred basis in an IRA. Sale of the Contracts for use with IRA's may be
subject to  special  requirements  imposed  by  the  Internal  Revenue  Service.
Purchasers  of  the  Contracts for  such  purposes  will be  provided  with such
supplementary information as may be required by the Internal Revenue Service  or
other  appropriate agency, and will have the  right to revoke the Contract under
certain circumstances as described  in the section  of this Prospectus  entitled
"Right to Return Contract."
 
                        ADMINISTRATION OF THE CONTRACTS
 
    The  Company  performs  certain  administrative  functions  relating  to the
Contracts, the Participant's Accounts, and the Variable Account. These functions
include, among other things, maintaining the  books and records of the  Variable
Account  and the  Sub-Accounts, and  maintaining records  of the  name, address,
taxpayer identification number,  Contract number,  Participant's Account  number
and  type,  the  status  of  each  Participant's  Account  and  other  pertinent
information necessary to the administration and operation of the Contracts.
 
                         DISTRIBUTION OF THE CONTRACTS
 
   
    The offering of the Contracts is  continuous. The Contracts will be sold  by
licensed  insurance agents in  those states where the  Contracts may be lawfully
sold.  Such  agents  will   be  registered  representatives  of   broker-dealers
registered  under the  Securities Exchange  Act of 1934  who are  members of the
National Association  of Securities  Dealers,  Inc. and  who have  entered  into
distribution  agreements with the Company and the General Distributor, Clarendon
Insurance Agency, Inc. ("Clarendon"), 500 Boylston Street, Boston, Massachusetts
02116, a wholly-owned  subsidiary of Massachusetts  Financial Services  Company,
which  in  turn  is  a  wholly-owned subsidiary  of  the  Company.  Clarendon is
registered with  the Securities  and Exchange  Commission under  the  Securities
Exchange  Act  of  1934  as  broker-dealer  and  is  a  member  of  the National
Association of  Securities Dealers,  Inc.  Clarendon also  acts as  the  general
distributor  of certain  other annuity contracts  issued by the  Company and its
wholly-owned subsidiary, Sun Life Insurance and Annuity Company of New York, and
variable life insurance contracts issued  by the Company. Commissions and  other
distribution  compensation will be paid by the Company and will not be more than
6.86% of Purchase Payments.  In addition to commissions,  the Company may,  from
time  to time, pay or allow additional promotion incentives, in the form of cash
or other compensation. In some instances,  such other incentives may be  offered
only  to  certain  broker-dealers that  sell  or  are expected  to  sell, during
specified time periods, certain minimum amounts of the Contracts or Certificates
or other Contracts  offered by the  Company. Commissions will  not be paid  with
respect  to  Participant's  Accounts  established for  the  personal  account of
employees of the Company or any of its affiliates, or of persons engaged in  the
distribution  of the Contracts. During 1994,  1995 and 1996, approximately $424,
$85, and $0, respectively, was paid  to and retained by Clarendon in  connection
with the distribution of the Contracts.
    
 
                                       34
<PAGE>
                    ADDITIONAL INFORMATION ABOUT THE COMPANY
 
SELECTED FINANCIAL DATA
 
   
    The following selected financial data for the Company should be read in
conjunction with the financial statements and notes thereto included in this
Prospectus beginning on page 61.
    
 
<TABLE>
<CAPTION>
                                                          FOR THE YEARS ENDED DECEMBER 31
                                   ------------------------------------------------------------------------------
                                        1996            1995            1994            1993            1992
                                   --------------  --------------  --------------  --------------  --------------
<S>                                <C>             <C>             <C>             <C>             <C>
                                                                     (IN 000'S)
Revenues
  Premiums, annuity deposits and
   other revenue.................  $    2,131,939  $    1,883,901  $    1,997,525  $    2,443,310  $    1,339,282
  Net investment income and
   realized gains (losses).......         312,870         315,966         312,583         311,322         292,746
                                   --------------  --------------  --------------  --------------  --------------
                                        2,444,809       2,199,867       2,310,108       2,754,632       1,632,028
                                   --------------  --------------  --------------  --------------  --------------
Benefits and expenses
  Policyholder benefits                 2,149,145       1,995,208       2,102,290       2,515,320       1,426,756
  Other expenses                          175,342         150,937         186,892         232,365         229,004
                                   --------------  --------------  --------------  --------------  --------------
                                        2,324,487       2,146,145       2,289,182       2,747,685       1,655,760
                                   --------------  --------------  --------------  --------------  --------------
Operating gain (loss)                     120,322          53,722          20,926           6,947         (23,732)
Federal income tax expense
  (benefit)                                (2,702)         17,807          19,469           3,691         (15,360)
                                   --------------  --------------  --------------  --------------  --------------
Net income (loss)                  $      123,024  $       35,915  $        1,457  $        3,256  $       (8,372)
                                   --------------  --------------  --------------  --------------  --------------
                                   --------------  --------------  --------------  --------------  --------------
Assets                             $   13,759,005  $   12,359,683  $   10,117,822  $    9,179,090  $    7,474,407
                                   --------------  --------------  --------------  --------------  --------------
                                   --------------  --------------  --------------  --------------  --------------
Surplus notes                      $      315,000  $      650,000  $      335,000  $      335,000  $      265,000
                                   --------------  --------------  --------------  --------------  --------------
                                   --------------  --------------  --------------  --------------  --------------
</TABLE>
 
See Note 1 to financial statements for the effect of the reinsurance agreements
on net income.
See Note 1 to financial statements for changes in accounting principles and
reporting.
 
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
OPERATIONS.
 
FINANCIAL CONDITION
 
ASSETS
 
    For management purposes it is the Company's practice to segment its general
account to facilitate the matching of assets and liabilities; however, all
general account assets stand behind all general account liabilities. A majority
of the Company's assets are income producing investments. Particular attention
is paid to the quality of these assets.
 
    The Company's bond holdings consist of a diversified portfolio of both
public and private issues. It is the Company's policy to acquire only investment
grade securities. Private placements are rated internally with reference to the
National Association of Insurance Commissioners ("NAIC") designation issued by
the NAIC Securities Valuation Office. The overall quality of the Company's bond
portfolio remains high. At December 31, 1996, 5.0% of the Company's holdings of
bonds were rated below investment grade (i.e. below NAIC rating "1" or "2"). Net
unrealized gains on below investment grade bonds were $837,435 at December 31,
1996.
 
    The Company holds real estate primarily because such investments
historically have offered better yields over the long-term than fixed income
investments. Real estate investments are used to enhance the yield of products
with long-term liability durations. Properties for which market value is lower
than cost
 
                                       35
<PAGE>
adjusted for depreciation (book value) are reported at market value. During
1996, the change in the difference between the market value and book value for
properties reported at market value was $4,624,000.
 
    Significant attention has been given to insurance companies' exposure to
mortgage loans secured by real estate. The Company had a mortgage portfolio of
$938,932,000 at December 31, 1996, representing 26.9% of cash and invested
assets. At December 31, 1995, mortgage loans represented 26.5% of cash and
invested assets. The Company underwrites commercial mortgages with a maximum
loan to value ratio of 75%. The Company as a rule invests only in properties
that are almost fully leased. The portfolio is diversified by region and by
property type. The level of arrears in the portfolio is substantially below the
industry average. At December 31, 1996, 0.45% of the Company's portfolio was 60
days or more in arrears, compared to the most recent industry delinquency ratio
published by the American Council of Life Insurance of 2.51%. The expense in the
year for the provision for losses and for losses on foreclosures was $2,767,000.
 
    During 1996, the Company purchased three limited partnership investments for
an aggregate total of $12,285,000 that were formed to own and operate apartment
complexes which qualify for low income tax credits. The credits are taken
annually over a ten year period, but are fully vested at the end of a fifteen
year compliance period. The Company also committed to an additional limited
partnership interest for $10,180,000 in 1995. These investments are classified
as other invested assets in the balance sheet.
 
    In the normal course of business, the Company makes commitments to purchase
investments at a future date. As of December 31, 1996 the Company had
outstanding mortgage commitments of $9,800,000 which will be funded during 1997.
 
LIABILITIES
 
    The majority of the Company's liabilities consist of reserves for life
insurance and annuity contracts and deposit funds.
 
CAPITAL AND SURPLUS
 
    Total capital stock and surplus of the Company was $567,143,000 at December
31, 1996. The Company issued surplus notes during 1995 totalling $315,000,000 to
an affiliate, Sun Canada Financial Co. The Company repaid $335,000,000 of
surplus notes to its parent in 1996. During 1994, the Company reduced its
carrying value of Massachusetts Casualty Insurance Company, a wholly owned
subsidiary, by $18,397,000, the unamortized amount of goodwill. The reduction
was accounted for as a direct charge to surplus. The Company's management
considers its surplus position to be adequate.
 
RESULTS OF OPERATIONS
 
1996 COMPARED TO 1995
 
    Net income from operations after dividends and before federal income taxes
increased by $61.1 million for the year ending December 31, 1996 as compared to
December 31, 1995. Net income associated with the reinsurance agreements with
the parent increased by $23.9 million in 1996. The net income improvement in the
reinsured business results from improved mortality experience, improved
investment performance and fewer significant death claims in 1996 as compared to
1995. Prior to reinsurance, earnings from the life line of business remained
relatively flat. The remaining $37.2 million increase is attributable to the
Company's retirement products and services line of business, which markets
combination fixed/variable annuities and group pension guaranteed investment
contracts. The decline in interest rates during 1995 resulted in the split of
these combination fixed/variable annuity sales to change from 45% fixed and 55%
variable in 1995 to 25% fixed and 75% variable in 1996. In addition, total gross
sales increased by $235.9 million in 1996 as compared to 1995. The declining
interest rate environment and strong market performance in 1995 resulted in
unrealized gains on assets held in the separate accounts, which generated a
substantial increase in fees calculated as a percentage of the separate account
net assets, which are then transferred to the general account. The declining
interest rates also resulted in increases in reserves due to the increase in the
market value adjustment provision of certain fixed annuities. The resultant
reserve increases were in excess of the unrealized gains causing strain on the
1995 earnings. In 1996, interest rates increased, resulting in a reduction in
the unrealized gains on assets held in the separate accounts and a
 
                                       36
<PAGE>
corresponding reduction in reserves and a release of some of the reserve strain
incurred in 1995. The earnings on these market value adjusted products fluctuate
as the change in the market value of the assets do not move in tandem with the
change in the market value of the liabilities.
 
    Total income increased by $239.4 million for the year ended December 31,
1996 as compared to December 31, 1995. Sales of combination fixed/variable
annuities (net of annuitizations) increased by $282.7 million primarily due to
an increase in variable sales held in the separate accounts. This increase in
variable sales was driven by strong performance in the stock market. Reinsurance
had the effect of increasing income by approximately $9.4 million. Premiums and
annuity considerations increased by $8.2 million reflecting increased
annuitizations. Considerations from supplementary contracts increased by $1.2
million. Sales of group pension guaranteed investment contracts decreased by $53
million as this market remains highly competitive and sensitive to small changes
in guaranteed interest rates. Net investment income decreased by $9.1 million,
reflecting a decrease in the general account invested assets.
 
    Benefits and expenses increased by $178.3 million for the year ended
December 31, 1996 as compared to December 31, 1995. Reinsurance had the effect
of decreasing benefits and expenses by $14.5 million. Deaths, annuity payments
and surrender benefits and other funds withdrawals increased by $438.9 million
as a result of increased surrenders of fixed annuities for which interest rate
guarantee periods have expired as well as withdrawals from the separate
accounts. Policy reserves increased by $9.4 million, reflecting increased
annuitizations and increased reserves for minimum death benefit guarantees. The
decrease in liability for premium and other deposit funds of $405.9 million
reflects lower interest rates and higher surrenders of contracts described
above. Commissions increased by $21.8 million, reflecting the increase in total
sales of combination fixed/variable annuities. General expenses increased by
$2.6 million reflecting an increase in salaries due to staff increases and
retainer fees. Transfers to separate accounts increased by $126.8 million,
reflecting increased exchange activity out of the general account into the
separate accounts.
 
1995 COMPARED TO 1994
 
    Net income from operations after dividends and before federal income taxes
increased by $23.7 million for the year ending December 31, 1995 as compared to
December 31, 1994. Reinsurance agreements with the parent had the effect of
increasing net income by $40.9 million from a loss of $9.6 million in 1994 to a
gain of $31.3 million in 1995. The increase in net income associated with the
reinsurance agreements is due to the lack of surplus strain associated with the
assumption of new contracts issued. No new contracts were assumed by the Company
beginning in 1994. The remaining decrease in net income from operations of $17.2
million is attributable to the Company's retirement products and services line
of business, which markets combination fixed/variable annuities and group
pension guaranteed investment contracts. The declining interest rate environment
in 1995 resulted in unrealized gains on assets held in the separate accounts,
which generated a substantial increase in fees calculated as a percentage of the
separate account net assets, which are then transferred to the general account.
The declining interest rates also resulted in increases in reserves due to the
increase in the market value adjustment provision. The resultant reserve
increases were in excess of the unrealized gains causing strain on the 1995
earnings. The earnings on these market value adjusted products fluctuate as the
change in the market value of the assets do not move in tandem with the change
in the market value of the liabilities.
 
    Total income decreased by $119.2 million for the year ended December 31,
1995 as compared to December 31, 1994. Reinsurance had the effect of decreasing
income by approximately $4.3 million. Premiums and annuity considerations
decreased by $5.5 million, reflecting decreased group pension lottery sales of
$22.1 million partially offset by increased annuitizations. Considerations from
supplementary contracts decreased by $1.8 million. Sales of combination
fixed/variable (net of annuitizations) decreased by $151.3 million, reflecting
the decline in the interest rate environment during 1995. Sales of group pension
guaranteed investment contracts increased by $49.2 million reflecting the
transfer of the parents' agent's pension fund from the parent to the Company.
Net investment income and amortization of the interest maintenance reserve
decreased by $5.6 million, primarily due to capital losses incurred late in
1994, which were then amortized through the interest maintenance reserve during
1995.
 
                                       37
<PAGE>
    Benefits and expenses decreased by $143 million for the year ended December
31, 1994. Reinsurance had the effect of decreasing benefits and expenses by
$45.2 million. Deaths, annuity payments and surrender benefits and other fund
withdrawals increased by $106.5 million as a result of increased surrenders of
fixed annuities for which interest rate guarantee periods have expired, as well
as withdrawals from the separate accounts. Policy reserves decreased by $16.7
million primarily resulting from increased reserves for minimum death benefit
guarantees. The increase in liability for premium and other deposit funds of
$83.1 million reflects fewer maturities of contracts for which the guarantee
periods have expired, and increased sales of group pension guaranteed investment
contracts described above. Commissions decreased by $5.5 million, reflecting the
decrease in total sales of combination fixed/variable annuities. General
expenses increased by $3.3 million, reflecting increased expenses allocated from
the parent and increased salaries due to staffing. Transfers to separate
accounts decreased by $268.8 million, reflecting less exchange activity out of
the separate accounts into the general account and fewer variable annuity sales
transferred to the separate accounts.
 
LIQUIDITY
 
    The Company's cash inflow consists primarily of premiums on insurance and
annuity products, income from investments, repayments of investment principal
and sales of investments. The Company's cash outflow is primarily to meet death
and other maturing insurance and annuity contract obligations, to pay out on
contract terminations, to fund investment commitments and to pay normal
operating expenses and taxes. Cash outflows are met from the normal net cash
inflows.
 
    The Company segments its business internally and matches projected cash
inflows and outflows within each segment. Targets for money market holdings are
established for each segment, which in the aggregate meet the day to day cash
needs of the Company. If greater liquidity is required, government issued bonds,
which are highly liquid, are sold to provide the necessary funds. Government and
publicly traded corporate bonds comprise 65.9% of the Company's long-term bond
holdings.
 
    Management believes that the Company's sources of liquidity are more than
adequate to meet its anticipated needs.
 
REINSURANCE
 
    The Company has agreements with its parent company which provide that the
parent company will reinsure the mortality risks of the individual life
insurance contracts previously sold by the Company. Under these agreements basic
death benefits and supplementary benefits are reinsured on a yearly renewable
term basis and coinsurance basis, respectively. Reinsurance transactions under
these agreements in 1996 had the effect of decreasing net income from operations
by $1,603,000.
 
    Effective January 1, 1991 the Company entered into an agreement with the
parent company under which certain individual life insurance contracts issued by
the parent were reinsured by the Company on a 90% coinsurance basis. Also
effective January 1, 1991 the Company entered into an agreement with the parent
which provides that the parent will reinsure the mortality risks in excess of
$500,000 per policy for the individual life insurance contracts assumed by the
Company in the reinsurance agreement described above. Death benefits are
reinsured on a yearly renewable term basis. These agreements had the effect of
increasing income from operations by approximately $35,161,000 for the year
ended December 31, 1996.
 
    The life reinsurance assumed agreement requires the reinsurer to withhold
funds in an amount equal to the reserves assumed.
 
    The Company also has executed a reinsurance agreement with an unaffiliated
company which provides reinsurance of certain individual life insurance
contracts on a modified coinsurance basis and under which all deficiency
reserves are ceded.
 
RESERVES
 
    In accordance with the life insurance laws and regulations under which the
Company operates it is obligated to carry on its books, as liabilities,
actuarially determined reserves to meet its obligations on its outstanding
contracts. Reserves are based on mortality tables in general use in the United
States and are computed to equal amounts that, with additions from premiums to
be received, and with interest on such
 
                                       38
<PAGE>
reserves compounded annually at certain assumed rates, will be sufficient to
meet the Company's policy obligations at their maturities or in the event of an
insured's death. In the accompanying Financial Statements these reserves are
determined in accordance with statutory regulations.
 
INVESTMENTS
 
    Of the Company's total assets of $13.8 billion at December 31, 1996, 65.6%
consisted of unitized and non-unitized separate account assets, 16.4% were
invested in bonds and similar securities, 6.8% in mortgages, 1.0% in
subsidiaries, 0.7% in real estate, and the remaining 9.5% in cash and other
assets.
 
COMPETITION
 
    The Company is engaged in a business that is highly competitive because of
the large number of stock and mutual life insurance companies and other entities
marketing insurance products. According to the most recent Best's Review,
Life-Health Edition, as of December 31, 1995 the Company ranked 39th among all
life insurance companies in the United States based upon total assets. Its
parent company, Sun Life Assurance Company of Canada, ranked 18th. Best's
Insurance Reports, Life-Health Edition, 1996, assigned the Company and the
parent company its highest classification, A++, as of December 31, 1995.
Standard & Poor's and Duff & Phelps have assigned the Company and the parent
company their highest ratings for claims paying ability, AAA. These ratings
should not be considered as bearing on the investment performance of the Series
Fund shares held in the Sub-Accounts of the Variable Account. However, the
ratings are relevant to the Company's ability to meet its general corporate
obligations under the Contracts.
 
EMPLOYEES
 
    The Company and Sun Life Assurance Company of Canada have entered into a
Service Agreement which provides that the latter will furnish the Company, as
required, with personnel as well as certain services and facilities on a cost
reimbursement basis. As of December 31, 1996 the Company had 269 direct
employees who are employed at its Principal Executive Office in Wellesley Hills,
Massachusetts and its Retirement Products & Services Division in Boston,
Massachusetts.
 
PROPERTIES
 
    The Company occupies office space owned by it and leased to its parent, Sun
Life Assurance Company of Canada, and certain unrelated parties for lease terms
not exceeding five years.
 
                 THE COMPANY'S DIRECTORS AND EXECUTIVE OFFICERS
 
    The directors and principal officers of the Company are listed below,
together with information as to their ages, dates of election and principal
business occupations during the last five years (if other than their present
business occupations). Except as otherwise indicated, the directors and officers
of the Company who are associated with Sun Life Assurance Company of Canada
and/or its subsidiaries have been associated with Sun Life Assurance Company of
Canada for more than five years either in the position shown or in other
positions.
 
JOHN D. MCNEIL, 63, Chairman and Director (1982*)
150 King Street West
Toronto, Ontario, Canada M5H 1J9
 
    He is Chairman and a Director of Sun Life Assurance Company of Canada and
Sun Life Insurance and Annuity Company of New York; a Director of Massachusetts
Financial Services Company; Chairman and a Trustee of MFS/Sun Life Series Trust;
Chairman and a Member of the Boards of Managers of Money Market Variable
Account, High Yield Variable Account, Capital Appreciation Variable Account,
Government Securities Variable Account, World Governments Variable Account,
Total Return Variable Account and Managed Sectors Variable Account; and a
Director of Shell (Canada) Limited and Canadian Pacific, Ltd.
 
- ------------------------
* Year Elected Director
 
                                       39
<PAGE>
DONALD A. STEWART, 50, President and Director (1996*)
150 King Street West
Toronto, Ontario, Canada M5H 1J9
 
    He is President and a Director of Sun Life Assurance Company of Canada and
Sun Life Insurance and Annuity Company of New York; and a Director of
Massachusetts Financial Services Company, Massachusetts Casualty Insurance
Company and Sun Life Financial Services Limited.
 
DAVID D. HORN, 55, Senior Vice President and General Manager and Director (1970,
1985*)
One Sun Life Executive Park
Wellesley Hills, Massachusetts 02181
 
    He is Senior Vice President and General Manager for the United States of Sun
Life Assurance Company of Canada; Chairman and President and a Director of Sun
Investment Services Company; Senior Vice President and a Director of Sun Life
Insurance and Annuity Company of New York; President and a Director of Sun
Benefit Services Company, Inc., Sun Canada Financial Co., and Sun Life Financial
Services Limited; a Director of Sun Capital Advisers, Inc. and Massachusetts
Casualty Insurance Company; a Trustee of MFS/ Sun Life Series Trust; and a
Member of the Boards of Managers of Money Market Variable Account, High Yield
Variable Account, Capital Appreciation Variable Account, Government Securities
Variable Account, World Governments Variable Account, Total Return Variable
Account and Managed Sectors Variable Account.
 
ANGUS A. MACNAUGHTON, 65, Director (1985*)
Metro Tower, Suite 1170,
950 Tower Lane
Foster City, California 94404
 
    He is President of Genstar Investment Corporation and a Director of Sun Life
Assurance Company of Canada, Sun Life Insurance and Annuity Company of New York,
Canadian Pacific, Ltd., Stelco, Inc. and Varian Associates, Inc.
 
JOHN S. LANE, 62, Director (1991*)
150 King Street West
Toronto, Ontario, Canada M5H 1J9
 
    He is Senior Vice President, Investments of Sun Life Assurance Company of
Canada; and a Director of Sun Investment Services Company, Sun Capital Advisers,
Inc. and Sun Life Insurance and Annuity Company of New York.
 
RICHARD B. BAILEY, 70, Director (1983*)
500 Boylston Street
Boston, Massachusetts 02116
 
    He is a Director of Sun Life Insurance and Annuity Company of New York and a
Director/Trustee of certain Funds in the MFS Family of Funds. Prior to October
1, 1991, he was Chairman and a Director of Massachusetts Financial Services
Company.
 
A. KEITH BRODKIN, 61, Director (1990*)
500 Boylston Street
Boston, Massachusetts 02116
 
    He is Chairman and a Director of Massachusetts Financial Services Company; a
Director of Sun Life Insurance and Annuity Company of New York; and a
Director/Trustee and/or Officer of the Funds in the MFS Family of Funds.
 
- ------------------------
* Year Elected Director
 
                                       40
<PAGE>
M. COLYER CRUM, 64, Director (1986*)
104 West Cliff Street
Weston, MA 02193
 
    He is Professor Emeritus of the Harvard Business School; and a Director of
Sun Life Assurance Company of Canada, Sun Life Insurance and Annuity Company of
New York, Merrill Lynch Ready Assets Trust, Merrill Lynch Basic Value Fund,
Inc., Merrill Lynch Special Value Fund, Inc., Merrill Lynch Capital Fund, Inc.,
Merrill Lynch U.S.A. Government Reserves, Merrill Lynch Natural Resources Trust,
Merrill Lynch U.S. Treasury Money Fund, MuniVest California Insured Fund, Inc.,
MuniVest Florida Fund, Inc., MuniVest Michigan Insured Fund, Inc., MuniVest New
Jersey Fund, Inc., MuniVest New York Insured Fund, Inc., MuniYield Florida
Insured Fund, MuniYield Insured Fund II, Inc., MuniYield Michigan Insured Fund,
Inc., MuniYield New Jersey Insured Fund, Inc., MuniYield New York Insured Fund
III, Inc. and MuniYield Pennsylvania Fund. Prior to July, 1996, he was a
Professor at the Harvard Business School.
 
S. CAESAR RABOY, 60, Senior Vice President and Deputy General Manager and
Director (1996*)
One Sun Life Executive Park
Wellesley Hills, Massachusetts 02181
 
    He is Senior Vice President and Deputy General Manager for the United States
of Sun Life Assurance Company of Canada; Senior Vice President of Sun Life
Insurance and Annuity Company of New York; and Vice President and a Director of
Sun Life Financial Services Limited.
 
ROBERT A. BONNER, 52, Vice President, Pensions (1986)
One Sun Life Executive Park
Wellesley Hills, Massachusetts 02181
 
    He is Vice President, Individual Insurance for the United States of Sun Life
Assurance Company of Canada.
 
C. JAMES PRIEUR, 46, Vice President, Investments (1993)
One Sun Life Executive Park
Wellesley Hills, Massachusetts 02181
 
    He is Vice President, Investments for the United States of Sun Life
Assurance Company of Canada; Vice President, Investments of Sun Investment
Services Company, Massachusetts Casualty Insurance Company and Sun Life
Insurance and Annuity Company of New York; and a Director of Sun Capital
Advisers, Inc., New London Trust, F.S.B. and Sun Canada Financial Co.
 
L. BROCK THOMSON, 55, Vice President and Treasurer (1974)
One Sun Life Executive Park
Wellesley Hills, Massachusetts 02181
 
    He is Vice President, Portfolio Management for the United States of Sun Life
Assurance Company of Canada; Vice President and Treasurer of Sun Investment
Services Company, Sun Capital Advisers, Inc., Sun Benefit Services Company, Inc.
and Sun Life Insurance and Annuity Company of New York; and Assistant Treasurer
of Massachusetts Casualty Insurance Company.
 
ROBERT P. VROLYK, 44, Vice President and Actuary (1986)
One Sun Life Executive Park
Wellesley Hills, Massachusetts 02181
 
    He is Vice President, Finance for the United States of Sun Life Assurance
Company of Canada; Vice President, Controller and Actuary of Sun Life Insurance
and Annuity Company of New York; a Director of Massachusetts Casualty Insurance
Company; and Vice President and a Director of Sun Canada Financial Co.
 
- ------------------------
* Year Elected Director
 
                                       41
<PAGE>
MARGARET SEARS MEAD, 47, Assistant Vice President and Secretary (1996)
One Sun Life Executive Park
Wellesley Hills, Massachusetts 02181
 
    She is Assistant Vice President and Counsel for the United States of Sun
Life Assurance Company of Canada; and Assistant Vice President and Secretary of
Sun Life Insurance and Annuity Company of New York.
 
    The directors, officers and employees of the Company are covered under a
commercial blanket bond and a liability policy. The directors, officers and
employees of Massachusetts Financial Services Company and Clarendon Insurance
Agency, Inc. are covered under a fidelity bond and errors and omissions policy.
 
EXECUTIVE COMPENSATION
 
    All of the executive officers of the Company also serve as officers of Sun
Life Assurance Company of Canada and receive no compensation directly from the
Company. Allocations have been made as to such officers' time devoted to duties
as executive officers of the Company and its subsidiaries. The allocated cash
compensation of all executive officers of the Company as a group for services
rendered in all capacities to the Company and its subsidiaries during 1996
totalled $936,945.
 
    Directors of the Company who are also officers of Sun Life Assurance Company
of Canada or its affiliates receive no compensation in addition to their
compensation as officers of Sun Life Assurance Company of Canada or its
affiliates. Messrs. Bailey, Crum and MacNaughton receive compensation in the
amount of $5,000 per year, plus $800 for each meeting attended, plus expenses.
 
    No shares of the Company are owned by any executive officer or director. The
Company is a wholly-owned subsidiary of Sun Life Assurance Company of Canada,
150 King Street West, Toronto, Ontario, Canada M5H 1J9.
 
                                STATE REGULATION
 
    The Company is subject to the laws of the State of Delaware governing life
insurance companies and to regulation by the Commissioner of Insurance of
Delaware. An annual statement is filed with the Commissioner of Insurance on or
before March 1st in each year relating to the operations of the Company for the
preceding year and its financial condition on December 31st of such year. Its
books and records are subject to review or examination by the Commissioner or
his agents at any time and a full examination of its operations is conducted at
periodic intervals.
 
    The Company is also subject to the insurance laws and regulations of the
other states and jurisdictions in which it is licensed to operate. The laws of
the various jurisdictions establish supervisory agencies with broad
administrative powers with respect to licensing to transact business, overseeing
trade practices, licensing agents, approving policy forms, establishing reserve
requirements, fixing maximum interest rates on life insurance policy loans and
minimum rates for accumulation of surrender values, prescribing the form and
content of required financial statements and regulating the type and amounts of
investments permitted. Each insurance company is required to file detailed
annual reports with supervisory agencies in each of the jurisdictions in which
it does business and its operations and accounts are subject to examination by
such agencies at regular intervals.
 
    In addition, many states regulate affiliated groups of insurers, such as the
Company, its parent and its affiliates, under insurance holding company
legislation. Under such laws, inter-company transfers of assets and dividend
payments from insurance subsidiaries may be subject to prior notice or approval,
depending on the size of such transfers and payments in relation to the
financial positions of the companies involved.
 
    Under insurance guaranty fund laws in most states, insurers doing business
therein can be assessed (up to prescribed limits) for policyholder losses
incurred by insolvent companies. The amount of any future assessments of the
Company under these laws cannot be reasonably estimated. However, most of these
laws do provide that an assessment may be excused or deferred if it would
threaten an insurer's own financial strength and many permit the deduction of
all or a portion of any such assessment from any future premium or similar taxes
payable.
 
                                       42
<PAGE>
    Although the federal government generally does not directly regulate the
business of insurance, federal initiatives often have an impact on the business
in a variety of ways. Current and proposed federal measures which may
significantly affect the insurance business include employee benefit regulation,
removal of barriers preventing banks from engaging in the insurance business,
tax law changes affecting the taxation of insurance companies, the tax treatment
of insurance products and its impact on the relative desirability of various
personal investment vehicles.
 
                               LEGAL PROCEEDINGS
 
    There are no pending legal proceedings affecting the Variable Account. The
Company and its subsidiaries are engaged in various kinds of routine litigation
which, in management's judgment, is not of material importance to their
respective total assets or material with respect to the Variable Account.
 
                                 LEGAL MATTERS
 
    The organization of the Company, its authority to issue the Contracts and
the validity of the form of the Contracts have been passed upon by David D.
Horn, Esq., Senior Vice President and General Manager of the Company. Covington
& Burling, Washington, D.C., has advised the Company on certain legal matters
concerning federal securities laws applicable to the issue and sale of the
Contracts and federal income tax laws applicable to the Contracts.
 
                                  ACCOUNTANTS
 
    The financial statements of the Variable Account for the year ended December
31, 1996 and the financial statements of the Company for the years ended
December 31, 1996, 1995 and 1994 included in this Prospectus have been audited
by Deloitte & Touche LLP, independent auditors, as stated in their reports
appearing herein, and are included in reliance upon the reports of such firm
given upon their authority as experts in accounting and auditing.
 
                            REGISTRATION STATEMENTS
 
    Registration statements have been filed with the Securities and Exchange
Commission, Washington, D.C., under the Securities Act of 1933 as amended, with
respect to the Contracts offered by this Prospectus. This Prospectus does not
contain all the information set forth in the registration statements and the
exhibits filed as part of the registration statements, to all of which reference
is hereby made for further information concerning the Variable Account, the
Fixed Account, the Company, the Series Fund, the Contract and the Certificates.
Statements found in this Prospectus as to the terms of the Contracts, the
Certificates and other legal instruments are summaries, and reference is made to
such instruments as filed.
 
                              FINANCIAL STATEMENTS
 
    The financial statements of the Company which are included in this
Prospectus should be considered only as bearing on the ability of the Company to
meet its obligations with respect to amounts allocated to the Fixed Account and
with respect to the death benefit and the Company's assumption of the mortality
and expense risks. They should not be considered as bearing on the investment
performance of the Series Fund shares held in the Sub-Accounts of the Variable
Account. The Variable Account value of the interests of Owners, Participants,
Annuitants, Payees and Beneficiaries under the Contracts is affected primarily
by the investment results of the Series Fund. The financial statements of the
Variable Account reflect units outstanding and expenses incurred under the
Contracts and other contracts participating in the Variable Account which impose
certain contract charges that are different from those imposed under the
Contracts.
 
                              -------------------
 
                                       43
<PAGE>
SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT F
 
STATEMENT OF CONDITION -- December 31, 1996
 
<TABLE>
<CAPTION>
 Assets:
   Investments in MFS/Sun Life Series Trust:                                              Shares          Cost           Value
                                                                                        -----------  --------------  --------------
 <S>                                                                                    <C>          <C>             <C>
     Capital Appreciation Series ("CAS")..............................................   25,132,284  $  766,909,799  $  900,536,472
     Conservative Growth Series ("CGS")...............................................   19,770,779     401,011,161     523,882,326
     Emerging Growth Series ("EGS")...................................................   16,666,213     230,812,345     247,167,495
     MFS/Foreign & Colonial Emerging Markets Equity Series ("FCE")....................      327,100       3,224,047       3,271,436
     MFS/Foreign & Colonial International Growth Series ("FCI").......................      562,577       5,592,414       5,528,287
     MFS/Foreign & Colonial International Growth and Income Series ("FCG")............    3,306,816      34,327,842      35,129,529
     Government Securities Series ("GSS").............................................   24,278,758     306,999,943     312,399,099
     High Yield Series ("HYS")........................................................   17,514,023     154,164,774     161,352,366
     Managed Sectors Series ("MSS")...................................................    9,317,147     215,659,135     244,571,670
     Money Market Series ("MMS")......................................................  361,990,229     361,990,229     361,990,229
     Research Series ("RES")..........................................................   19,366,153     278,182,415     320,982,471
     Total Return Series ("TRS")......................................................   64,136,813   1,023,618,937   1,246,814,708
     Utilities Series ("UTS").........................................................    4,863,242      54,423,213      68,022,646
     Value Series ("VAL").............................................................    1,517,402      15,964,246      16,708,887
     World Asset Allocation Series ("WAA")............................................    5,558,878      69,593,015      76,595,693
     World Governments Series ("WGS").................................................   11,343,137     133,129,911     127,697,954
     World Growth Series ("WGR")......................................................   14,821,543     177,938,986     193,180,439
     World Total Return Series ("WTR")................................................    2,817,773      33,508,607      37,379,327
                                                                                                     --------------  --------------
                                                                                                     $4,267,051,019  $4,883,211,034
                                                                                                     --------------
                                                                                                     --------------
 Liability:
   Payable to sponsor..............................................................................................         193,982
                                                                                                                     --------------
         Net assets................................................................................................  $4,883,017,052
                                                                                                                     --------------
                                                                                                                     --------------
</TABLE>
 
<TABLE>
<CAPTION>
                                                      Applicable to Owners of           Reserve
                                                Deferred Variable Annuity Contracts       for
                                              ---------------------------------------   Variable
 NET ASSETS APPLICABLE TO CONTRACT OWNERS:      Units     Unit Value       Value       Annuities       Total
                                              ----------  ----------   --------------  ----------  --------------
 <S>                                          <C>         <C>          <C>             <C>         <C>
   MFS Regatta Contracts:
     CAS -- Level 1.........................   6,316,305   $24.7064    $  156,017,899  $  312,018  $  156,329,917
     CAS -- Level 2.........................      58,968     9.9433           586,262      --             586,262
     GSS -- Level 1.........................   3,362,650    15.5644        52,333,731     105,552      52,439,283
     GSS -- Level 2.........................      55,891     9.9641           557,001      --             557,001
     HYS -- Level 1.........................   1,204,380    19.7545        23,789,006       6,482      23,795,488
     MSS -- Level 1.........................   2,202,213    22.0312        48,508,121     154,423      48,662,544
     MSS -- Level 2.........................      14,270     9.8974           141,231      --             141,231
     MMS -- Level 1.........................   3,859,738    12.7175        49,130,387      70,057      49,200,444
     MMS -- Level 2.........................      59,562    10.0240           597,029      --             597,029
     TRS -- Level 1.........................  12,461,003    20.0405       249,689,122   1,231,911     250,921,033
     TRS -- Level 2.........................      32,548    10.0182           325,990      --             325,990
     WGS -- Level 1.........................   1,460,289    16.7734        24,491,432      70,682      24,562,114
     WGS -- Level 2.........................       3,325    10.0242            33,342      --              33,342
                                                                       --------------  ----------  --------------
                                                                       $  606,200,553  $1,951,125  $  608,151,678
                                                                       --------------  ----------  --------------
                                                   (continued)
</TABLE>
 
                       See notes to financial statements
 
                                       44
<PAGE>
SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT F
 
STATEMENT OF CONDITION -- continued
 
<TABLE>
<CAPTION>
                                                      Applicable to Owners of           Reserve
 NET ASSETS APPLICABLE TO CONTRACT OWNERS       Deferred Variable Annuity Contracts       for
  (CONTINUED):                                ---------------------------------------   Variable
   MFS Regatta Gold Contracts:                  Units     Unit Value       Value       Annuities       Total
                                              ----------  ----------   --------------  ----------  --------------
 <S>                                          <C>         <C>          <C>             <C>         <C>
     CAS....................................  32,796,793   $22.5700    $  740,124,719  $3,625,224  $  743,749,943
     CGS....................................  26,199,975    19.9527       522,718,845   1,066,236     523,785,081
     EGS....................................  16,998,044    14.5136       246,685,538     353,268     247,038,806
     FCE....................................     329,630     9,9199         3,269,984      --           3,269,984
     FCI....................................     564,742     9.7480         5,505,724      --           5,505,724
     FCG....................................   3,360,596    10.4404        35,086,469      44,540      35,131,009
     GSS....................................  19,714,114    13.1252       258,776,682     585,330     259,362,012
     HYS....................................   8,424,289    16.2674       137,014,091     379,983     137,394,074
     MSS....................................  10,541,726    18.5452       195,501,650     249,088     195,750,738
     MMS....................................  27,275,583    11.3932       310,768,495   1,123,193     311,891,688
     RES....................................  19,577,745    16.3209       319,523,687   1,325,790     320,849,477
     TRS....................................  59,508,016    16.6932       993,286,276   1,708,347     994,994,623
     UTS....................................   4,671,192    14.5260        67,842,478      94,818      67,937,296
     VAL....................................   1,520,787    10.9234        16,612,132      --          16,612,132
     WAA....................................   5,539,010    13.7702        76,273,571     279,123      76,552,694
     WGS....................................   7,510,766    13.6780       102,745,888     402,541     103,148,429
     WGR....................................  13,989,946    13.7523       192,388,258     837,846     193,226,104
     WTR....................................   2,836,079    13.1290        37,233,242     151,430      37,384,672
                                                                       --------------  ----------  --------------
                                                                       $4,261,357,729  $12,226,757 $4,273,584,486
                                                                       --------------  ----------  --------------
   MFS Regatta Classic Contracts:
     CAS....................................       1,892   $ 9.8765    $       18,695  $   --      $       18,695
     CGS....................................       3,545     9.8549            34,931      --              34,931
     EGS....................................       9,744     9.5644            93,182      --              93,182
     FCE....................................         140    10.4127             1,452      --               1,452
     FCI....................................       2,249    10.0270            22,563      --              22,563
     GSS....................................       6,514     9.9631            64,981      --              64,981
     HYS....................................       8,219    10.0910            82,946      --              82,946
     MMS....................................      13,813    10.0239           138,477       3,211         141,688
     RES....................................      25,665     9.8296           253,132      --             253,132
     TRS....................................      40,575     9.9034           401,899       3,152         405,051
     VAL....................................       9,578    10.1034            96,755      --              96,755
     WAA....................................       6,448    10.0430            64,803      --              64,803
     WGR....................................          71    10.0000               709      --                 709
                                                                       --------------  ----------  --------------
                                                                       $    1,274,525  $    6,363  $    1,280,888
                                                                       --------------  ----------  --------------
         Net assets.................................................   $4,868,832,807  $14,184,245 $4,883,017,052
                                                                       --------------  ----------  --------------
                                                                       --------------  ----------  --------------
</TABLE>
 
                       See notes to financial statements
 
                                       45
<PAGE>
SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT F
 
STATEMENTS OF OPERATIONS -- Year Ended December 31, 1996
<TABLE>
<CAPTION>
                                           CAS             CGS            EGS            FCE           FCI
                                       Sub-Account     Sub-Account    Sub-Account    Sub-Account*  Sub-Account*
                                      -------------   -------------   ------------   -----------   -----------
 <S>                                  <C>             <C>             <C>            <C>           <C>
 INCOME AND EXPENSES:
   Dividend income and capital gain
    distributions received..........  $  63,903,295   $  14,154,274   $    223,676    $ --         $   --
   Mortality and expense risk
    charges.........................      9,787,529       4,790,582      1,957,296      11,630         19,294
   Distribution expense charges.....        220,157        --              --           --             --
   Administrative expense charges...        954,346         574,870        234,876       1,396          2,315
                                      -------------   -------------   ------------   -----------   -----------
       Net investment income
        (expense)...................  $  52,941,263   $   8,788,822   $ (1,968,496)   $(13,026)    $  (21,609)
                                      -------------   -------------   ------------   -----------   -----------
                                      -------------   -------------   ------------   -----------   -----------
 REALIZED AND UNREALIZED GAINS
  (LOSSES):
   Realized gains (losses) on
    investment transactions:
     Proceeds from sales............  $ 267,285,199   $  12,067,114   $ 29,861,505    $513,892     $1,726,076
     Cost of investments sold.......    205,115,450       7,554,344     25,584,337     519,604      1,727,754
                                      -------------   -------------   ------------   -----------   -----------
       Net realized gains
        (losses)....................  $  62,169,749   $   4,512,770   $  4,277,168    $ (5,712)    $   (1,678)
                                      -------------   -------------   ------------   -----------   -----------
   Net unrealized appreciation
    (depreciation) on investments:
     End of year....................  $ 133,626,673   $ 122,871,165   $ 16,355,150    $ 47,389     $  (64,127)
     Beginning of year..............    106,570,446      52,910,544      3,552,956      --             --
                                      -------------   -------------   ------------   -----------   -----------
       Change in unrealized
        appreciation
        (depreciation)..............  $  27,056,227   $  69,960,621   $ 12,802,194    $ 47,389     $  (64,127)
                                      -------------   -------------   ------------   -----------   -----------
     Realized and unrealized gains
      (losses)......................  $  89,225,976   $  74,473,391   $ 17,079,362    $ 41,677     $  (65,805)
                                      -------------   -------------   ------------   -----------   -----------
   INCREASE (DECREASE) IN NET ASSETS
    FROM OPERATIONS.................  $ 142,167,239   $  83,262,213   $ 15,110,866    $ 28,651     $  (87,414)
                                      -------------   -------------   ------------   -----------   -----------
                                      -------------   -------------   ------------   -----------   -----------
 
<CAPTION>
                                          FCG            GSS            HYS
                                      Sub-Account    Sub-Account    Sub-Account
                                      -----------   -------------   ------------
 <S>                                  <C>           <C>             <C>
 INCOME AND EXPENSES:
   Dividend income and capital gain
    distributions received..........  $   --        $  18,191,771   $  9,492,026
   Mortality and expense risk
    charges.........................     293,242        3,900,496      1,670,108
   Distribution expense charges.....      --               81,209         29,566
   Administrative expense charges...      35,189          386,851        170,847
                                      -----------   -------------   ------------
       Net investment income
        (expense)...................  $ (328,431)   $  13,823,215   $  7,621,505
                                      -----------   -------------   ------------
                                      -----------   -------------   ------------
 REALIZED AND UNREALIZED GAINS
  (LOSSES):
   Realized gains (losses) on
    investment transactions:
     Proceeds from sales............  $6,264,957    $  80,691,084   $ 89,548,001
     Cost of investments sold.......   6,013,559       83,195,407     83,844,433
                                      -----------   -------------   ------------
       Net realized gains
        (losses)....................  $  251,398    $  (2,504,323)  $  5,703,568
                                      -----------   -------------   ------------
   Net unrealized appreciation
    (depreciation) on investments:
     End of year....................  $  801,687    $   5,399,156   $  7,187,592
     Beginning of year..............     111,437       15,950,791      6,347,251
                                      -----------   -------------   ------------
       Change in unrealized
        appreciation
        (depreciation)..............  $  690,250    $ (10,551,635)  $    840,341
                                      -----------   -------------   ------------
     Realized and unrealized gains
      (losses)......................  $  941,648    $ (13,055,958)  $  6,543,909
                                      -----------   -------------   ------------
   INCREASE (DECREASE) IN NET ASSETS
    FROM OPERATIONS.................  $  613,217    $     767,257   $ 14,165,414
                                      -----------   -------------   ------------
                                      -----------   -------------   ------------
</TABLE>
 
*For the period July 1, 1996 (commencement of operations) to December 31, 1996.
 
                       See notes to financial statements
 
                                       46
<PAGE>
SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT F
 
STATEMENTS OF OPERATIONS -- continued
<TABLE>
<CAPTION>
                                               MSS             MMS            RES             TRS            UTS
                                           Sub-Account     Sub-Account    Sub-Account     Sub-Account    Sub-Account
                                           ------------   -------------   ------------   -------------   ------------
 <S>                                       <C>            <C>             <C>            <C>             <C>
 INCOME AND EXPENSES:
   Dividend income and capital gain
    distributions received...............  $ 27,063,786   $  13,803,397   $  2,171,374   $  80,430,595   $  2,685,506
   Mortality and expense risk charges....     2,649,730       3,584,245      2,320,870      14,086,166        677,251
   Distribution expense charges..........        66,547          68,418        --              359,085        --
   Administrative expense charges........       251,421         361,691        278,504       1,331,255         81,270
                                           ------------   -------------   ------------   -------------   ------------
       Net investment income (expense)...  $ 24,096,088   $   9,789,043   $   (428,000)  $  64,654,089   $  1,926,985
                                           ------------   -------------   ------------   -------------   ------------
                                           ------------   -------------   ------------   -------------   ------------
 REALIZED AND UNREALIZED GAINS (LOSSES):
   Realized gains (losses) on investment
    transactions:
     Proceeds from sales.................  $ 31,986,225   $ 601,132,062   $  5,303,758   $  76,812,211   $  6,901,492
     Cost of investments sold............    29,087,317     601,132,062      3,452,995      56,301,150      5,283,786
                                           ------------   -------------   ------------   -------------   ------------
       Net realized gains (losses).......  $  2,898,908   $    --         $  1,850,763   $  20,511,061   $  1,617,706
                                           ------------   -------------   ------------   -------------   ------------
   Net unrealized appreciation
    (depreciation) on investments:
     End of year.........................  $ 28,912,535   $    --         $ 42,800,056   $ 223,195,771   $ 13,599,433
     Beginning of year...................    24,275,006        --            8,623,371     172,733,800      7,026,868
                                           ------------   -------------   ------------   -------------   ------------
       Change in unrealized appreciation
        (depreciation)...................  $  4,637,529   $    --         $ 34,176,685   $  50,461,971   $  6,572,565
                                           ------------   -------------   ------------   -------------   ------------
     Realized and unrealized gains
      (losses)...........................  $  7,536,437   $    --         $ 36,027,448   $  70,973,032   $  8,190,271
                                           ------------   -------------   ------------   -------------   ------------
   INCREASE IN NET ASSETS FROM
    OPERATIONS...........................  $ 31,632,525   $   9,789,043   $ 35,599,448   $ 135,627,121   $ 10,117,256
                                           ------------   -------------   ------------   -------------   ------------
                                           ------------   -------------   ------------   -------------   ------------
 
<CAPTION>
                                              VAL           WAA            WGS
                                           Sub-Account* Sub-Account    Sub-Account
                                           ----------   -----------   -------------
 <S>                                       <C>          <C>           <C>
 INCOME AND EXPENSES:
   Dividend income and capital gain
    distributions received...............   $ --        $1,323,112    $  18,375,771
   Mortality and expense risk charges....     47,876       649,587        1,642,776
   Distribution expense charges..........     --            --               38,491
   Administrative expense charges........      5,745        77,950          158,642
                                           ----------   -----------   -------------
       Net investment income (expense)...   $(53,621)   $  595,575    $  16,535,862
                                           ----------   -----------   -------------
                                           ----------   -----------   -------------
 REALIZED AND UNREALIZED GAINS (LOSSES):
   Realized gains (losses) on investment
    transactions:
     Proceeds from sales.................   $458,854    $7,401,713    $  27,818,987
     Cost of investments sold............    435,556     5,772,117       30,531,078
                                           ----------   -----------   -------------
       Net realized gains (losses).......   $ 23,298    $1,629,596    $  (2,712,091)
                                           ----------   -----------   -------------
   Net unrealized appreciation
    (depreciation) on investments:
     End of year.........................   $744,641    $7,002,678    $  (5,431,957)
     Beginning of year...................     --         2,577,570        4,376,710
                                           ----------   -----------   -------------
       Change in unrealized appreciation
        (depreciation)...................   $744,641    $4,425,108    $  (9,808,667)
                                           ----------   -----------   -------------
     Realized and unrealized gains
      (losses)...........................   $767,939    $6,054,704    $ (12,520,758)
                                           ----------   -----------   -------------
   INCREASE IN NET ASSETS FROM
    OPERATIONS...........................   $714,318    $6,650,279    $   4,015,104
                                           ----------   -----------   -------------
                                           ----------   -----------   -------------
</TABLE>
 
*For the period June 3, 1996 (commencement of operations) to December 31, 1996.
 
                       See notes to financial statements
 
                                       47
<PAGE>
SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT F
 
STATEMENTS OF OPERATIONS -- continued
 
<TABLE>
<CAPTION>
                                               WGR            WTR
                                           Sub-Account    Sub-Account        Total
                                           ------------   -----------   ---------------
 <S>                                       <C>            <C>           <C>
 INCOME AND EXPENSES:
   Dividend income and capital gain
    distributions received...............  $ 12,008,681   $  432,723    $   264,259,987
   Mortality and expense risk charges....     2,171,808      322,479         50,582,965
   Distribution expense charges..........       --            --                863,473
   Administrative expense charges........       260,617       38,697          5,206,482
                                           ------------   -----------   ---------------
       Net investment income.............  $  9,576,256   $   71,547    $   207,607,067
                                           ------------   -----------   ---------------
                                           ------------   -----------   ---------------
 REALIZED AND UNREALIZED GAINS:
   Realized gains on investment
    transactions:
     Proceeds from sales.................  $ 43,985,963   $3,013,874    $ 1,292,772,967
     Cost of investments sold............    37,967,798    2,468,484      1,185,987,231
                                           ------------   -----------   ---------------
       Net realized gains................  $  6,018,165   $  545,390    $   106,785,736
                                           ------------   -----------   ---------------
   Net unrealized appreciation on
    investments:
     End of year.........................  $ 15,241,453   $3,870,720    $   616,160,015
     Beginning of year...................    13,826,397    1,024,871        419,908,018
                                           ------------   -----------   ---------------
       Change in unrealized
       appreciation......................  $  1,415,056   $2,845,849    $   196,251,997
                                           ------------   -----------   ---------------
     Realized and unrealized gains.......  $  7,433,221   $3,391,239    $   303,037,733
                                           ------------   -----------   ---------------
   INCREASE IN NET ASSETS FROM
    OPERATIONS...........................  $ 17,009,477   $3,462,786    $   510,644,800
                                           ------------   -----------   ---------------
                                           ------------   -----------   ---------------
</TABLE>
 
                       See notes to financial statements
 
                                       48
<PAGE>
SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT F
 
STATEMENTS OF CHANGES IN NET ASSETS
 
<TABLE>
<CAPTION>
                                              CAS                             CGS                             EGS
                                          Sub-Account                     Sub-Account                     Sub-Account
                                 -----------------------------   -----------------------------   -----------------------------
                                          Year Ended                      Year Ended                      Year Ended
                                         December 31,                    December 31,                    December 31,
                                 -----------------------------   -----------------------------   -----------------------------
                                     1996            1995            1996            1995            1996            1995*
                                 -------------   -------------   -------------   -------------   -------------   -------------
 <S>                             <C>             <C>             <C>             <C>             <C>             <C>
 OPERATIONS:
   Net investment income
    (expense)..................  $  52,941,263   $   4,868,051   $   8,788,822   $   1,641,149   $  (1,968,496)  $    (274,556)
   Net realized gains..........     62,169,749       8,669,752       4,512,770       1,559,779       4,277,168       2,216,787
   Net unrealized gains........     27,056,227     131,023,503      69,960,621      52,785,863      12,802,194       3,552,956
                                 -------------   -------------   -------------   -------------   -------------   -------------
     Increase in net assets
      from operations..........  $ 142,167,239   $ 144,561,306   $  83,262,213   $  55,986,791   $  15,110,866   $   5,495,187
                                 -------------   -------------   -------------   -------------   -------------   -------------
 PARTICIPANT TRANSACTIONS:
   Accumulation Activity:
     Purchase payments
      received.................  $ 148,876,483   $ 120,979,478   $ 153,852,554   $  74,122,408   $ 122,215,402   $  34,471,454
     Net transfers between
      Sub-Accounts and Fixed
      Account..................     (5,608,366)     51,189,081      36,048,717      19,980,665      50,369,380      27,751,346
     Withdrawals, surrenders,
      annuitizations and
      contract charges.........    (47,835,347)    (35,672,499)    (19,835,752)    (11,060,939)     (8,085,001)       (532,429)
                                 -------------   -------------   -------------   -------------   -------------   -------------
       Net accumulation
        activity...............  $  95,432,770   $ 136,496,060   $ 170,065,519   $  83,042,134   $ 164,499,781   $  61,690,371
                                 -------------   -------------   -------------   -------------   -------------   -------------
   Annuitization Activity:
     Annuitizations............  $   1,193,495   $   1,153,294   $     437,102   $     201,542   $     286,409   $      50,528
     Annuity payments and
      contract charges.........       (347,090)       (216,005)       (129,806)        (58,715)        (13,624)           (593)
     Net transfers between
      Sub-Accounts.............        119,425         531,083         116,806           2,298          44,347           4,223
     Adjustments to annuity
      reserves.................        (50,462)        131,042         (87,515)         30,462          21,044         (56,551)
                                 -------------   -------------   -------------   -------------   -------------   -------------
       Net annuitization
        activity...............  $     915,368   $   1,599,414   $     336,587   $     175,587   $     338,176   $      (2,393)
                                 -------------   -------------   -------------   -------------   -------------   -------------
   Increase in net assets from
    participant transactions...  $  96,348,138   $ 138,095,474   $ 170,402,106   $  83,217,721   $ 164,837,957   $  61,687,978
                                 -------------   -------------   -------------   -------------   -------------   -------------
     Increase in net assets....  $ 238,515,377   $ 282,656,780   $ 253,664,319   $ 139,204,512   $ 179,948,823   $  67,183,165
 NET ASSETS:
   Beginning of year...........    662,169,440     379,512,660     270,155,693     130,951,181      67,183,165        --
                                 -------------   -------------   -------------   -------------   -------------   -------------
   End of year.................  $ 900,684,817   $ 662,169,440   $ 523,820,012   $ 270,155,693   $ 247,131,988   $  67,183,165
                                 -------------   -------------   -------------   -------------   -------------   -------------
                                 -------------   -------------   -------------   -------------   -------------   -------------
</TABLE>
 
* For the period May 1, 1995 (commencement of operations) to December 31, 1995.
 
                       See notes to financial statements
 
                                       49
<PAGE>
SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT F
 
STATEMENTS OF CHANGES IN NET ASSETS -- continued
 
<TABLE>
<CAPTION>
                                       FCE           FCI                  FCG                            GSS
                                   Sub-Account   Sub-Account          Sub-Account                    Sub-Account
                                   -----------   -----------   --------------------------   -----------------------------
                                   Year Ended    Year Ended
                                    December      December             Year Ended                    Year Ended
                                       31,           31,              December 31,                  December 31,
                                                               --------------------------   -----------------------------
                                      1996*         1996*          1996         1995**          1996            1995
                                   -----------   -----------   ------------   -----------   -------------   -------------
 <S>                               <C>           <C>           <C>            <C>           <C>             <C>
 OPERATIONS:
   Net investment income
    (expense)....................  $  (13,026)   $  (21,609)   $   (328,431)  $   (10,744)  $  13,823,215   $  11,426,494
   Net realized gains (losses)...      (5,712)       (1,678)        251,398          (243)     (2,504,323)     (1,546,621)
   Net unrealized gains
    (losses).....................      47,389       (64,127)        690,250       111,437     (10,551,635)     29,605,147
                                   -----------   -----------   ------------   -----------   -------------   -------------
       Increase (decrease) in net
        assets from operations...  $   28,651    $  (87,414)   $    613,217   $   100,450   $     767,257   $  39,485,020
                                   -----------   -----------   ------------   -----------   -------------   -------------
 PARTICIPANT TRANSACTIONS:
   Accumulation Activity:
     Purchase payments
      received...................  $1,048,658    $2,460,672    $ 19,437,825   $ 4,120,619   $  54,669,405   $  47,266,837
     Net transfers between
      Sub-Accounts and Fixed
      Account....................   2,213,104     3,215,694       8,809,224     3,003,996     (14,448,899)    (42,381,252)
     Withdrawals, surrenders,
      annuitizations and contract
      charges....................     (18,977)      (60,665)       (951,163)      (46,320)    (21,010,408)    (21,245,942)
                                   -----------   -----------   ------------   -----------   -------------   -------------
       Net accumulation
        activity.................  $3,242,785    $5,615,701    $ 27,295,886   $ 7,078,295   $  19,210,098   $ (16,360,357)
                                   -----------   -----------   ------------   -----------   -------------   -------------
   Annuitization Activity:
     Annuitizations..............  $   --        $   --        $     43,066   $   --        $     268,329   $     354,393
     Annuity payments and
      contract charges...........      --            --              (1,385)      --             (240,819)       (168,285)
     Net transfers between
      Sub-Accounts...............      --            --             --            --             (309,558)        (53,070)
     Adjustments to annuity
      reserves...................      --            --               1,480       --              (40,665)         33,716
                                   -----------   -----------   ------------   -----------   -------------   -------------
       Net annuitization
        activity.................  $   --        $   --        $     43,161   $   --        $    (322,713)  $     166,754
                                   -----------   -----------   ------------   -----------   -------------   -------------
   Increase (decrease) in net
    assets from participant
    transactions.................  $3,242,785    $5,615,701    $ 27,339,047   $ 7,078,295   $  18,887,385   $ (16,193,603)
                                   -----------   -----------   ------------   -----------   -------------   -------------
     Increase in net assets......  $3,271,436    $5,528,287    $ 27,952,264   $ 7,178,745   $  19,654,642   $  23,291,417
 NET ASSETS:
   Beginning of year.............      --            --           7,178,745       --          292,768,635     269,477,218
                                   -----------   -----------   ------------   -----------   -------------   -------------
   End of year...................  $3,271,436    $5,528,287    $ 35,131,009   $ 7,178,745   $ 312,423,277   $ 292,768,635
                                   -----------   -----------   ------------   -----------   -------------   -------------
                                   -----------   -----------   ------------   -----------   -------------   -------------
</TABLE>
 
 * For the period July 1, 1996 (commencement of operations) to December 31,
1996.
 
** For the period October 4, 1995 (commencement of operations) to December 31,
1995.
 
                       See notes to financial statements
 
                                       50
<PAGE>
SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT F
 
STATEMENTS OF CHANGES IN NET ASSETS -- continued
<TABLE>
<CAPTION>
                                                        HYS                             MSS
                                                    Sub-Account                     Sub-Account
                                           -----------------------------   -----------------------------
                                                    Year Ended                      Year Ended
                                                   December 31,                    December 31,
                                           -----------------------------   -----------------------------
                                               1996            1995            1996            1995
                                           -------------   -------------   -------------   -------------
 <S>                                       <C>             <C>             <C>             <C>
 OPERATIONS:
   Net investment income.................  $   7,621,505   $   5,123,994   $  24,096,088   $   2,070,924
   Net realized gains....................      5,703,568       1,889,832       2,898,908       2,778,352
   Net unrealized gains..................        840,341       6,838,912       4,637,529      30,322,483
                                           -------------   -------------   -------------   -------------
       Increase in net assets from
        operations.......................  $  14,165,414   $  13,852,738   $  31,632,525   $  35,171,759
                                           -------------   -------------   -------------   -------------
 PARTICIPANT TRANSACTIONS:
   Accumulation Activity:
     Purchase payments received..........  $  33,898,269   $  20,152,853   $  40,598,625   $  34,586,296
     Net transfers between Sub-Accounts
      and Fixed Account..................      4,326,619      22,611,563       7,831,933       9,193,092
     Withdrawals, surrenders,
      annuitizations and contract
      charges............................    (11,758,613)     (7,980,818)    (13,315,281)     (9,392,233)
                                           -------------   -------------   -------------   -------------
       Net accumulation activity.........  $  26,466,275   $  34,783,598   $  35,115,277   $  34,387,155
                                           -------------   -------------   -------------   -------------
   Annuitization Activity:
     Annuitizations......................  $     137,217   $      16,894   $      82,609   $      92,920
     Annuity payments and contract
      charges............................        (79,990)        (68,402)        (76,110)        (56,337)
     Net transfers between
      Sub-Accounts.......................         14,805           8,428          41,877          94,161
     Adjustments to annuity reserves.....        (42,595)        (25,024)        (12,576)         (2,133)
                                           -------------   -------------   -------------   -------------
       Net annuitization activity........  $      29,437   $     (68,104)  $      35,800   $     128,611
                                           -------------   -------------   -------------   -------------
   Increase in net assets from
    participant transactions.............  $  26,495,712   $  34,715,494   $  35,151,077   $  34,515,766
                                           -------------   -------------   -------------   -------------
     Increase in net assets..............  $  40,661,126   $  48,568,232   $  66,783,602   $  69,687,525
 NET ASSETS:
   Beginning of year.....................    120,611,382      72,043,150     177,770,911     108,083,386
                                           -------------   -------------   -------------   -------------
   End of year...........................  $ 161,272,508   $ 120,611,382   $ 244,554,513   $ 177,770,911
                                           -------------   -------------   -------------   -------------
                                           -------------   -------------   -------------   -------------
 
<CAPTION>
                                                        MMS
                                                    Sub-Account
                                           -----------------------------
                                                    Year Ended
                                                   December 31,
                                           -----------------------------
                                               1996            1995
                                           -------------   -------------
 <S>                                       <C>             <C>
 OPERATIONS:
   Net investment income.................  $   9,789,043   $   7,468,244
   Net realized gains....................       --              --
   Net unrealized gains..................       --              --
                                           -------------   -------------
       Increase in net assets from
        operations.......................  $   9,789,043   $   7,468,244
                                           -------------   -------------
 PARTICIPANT TRANSACTIONS:
   Accumulation Activity:
     Purchase payments received..........  $ 208,990,259   $ 172,273,093
     Net transfers between Sub-Accounts
      and Fixed Account..................    (43,233,439)   (115,663,895)
     Withdrawals, surrenders,
      annuitizations and contract
      charges............................    (46,733,186)    (34,523,223)
                                           -------------   -------------
       Net accumulation activity.........  $ 119,023,634   $  22,085,975
                                           -------------   -------------
   Annuitization Activity:
     Annuitizations......................  $   1,121,927   $     583,368
     Annuity payments and contract
      charges............................       (206,726)       (185,934)
     Net transfers between
      Sub-Accounts.......................       (190,340)       (656,607)
     Adjustments to annuity reserves.....        (23,831)        (33,157)
                                           -------------   -------------
       Net annuitization activity........  $     701,030   $    (292,330)
                                           -------------   -------------
   Increase in net assets from
    participant transactions.............  $ 119,724,664   $  21,793,645
                                           -------------   -------------
     Increase in net assets..............  $ 129,513,707   $  29,261,889
 NET ASSETS:
   Beginning of year.....................    232,317,142     203,055,253
                                           -------------   -------------
   End of year...........................  $ 361,830,849   $ 232,317,142
                                           -------------   -------------
                                           -------------   -------------
</TABLE>
 
                       See notes to financial statements
 
                                       51
<PAGE>
SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT F
 
STATEMENTS OF CHANGES IN NET ASSETS -- continued
<TABLE>
<CAPTION>
                                                       RES                               TRS
                                                   Sub-Account                       Sub-Account
                                           ----------------------------   ---------------------------------
                                                    Year Ended                       Year Ended
                                                   December 31,                     December 31,
                                           ----------------------------   ---------------------------------
                                               1996            1995            1996              1995
                                           -------------   ------------   ---------------   ---------------
 <S>                                       <C>             <C>            <C>               <C>
 OPERATIONS:
   Net investment income (expense).......  $    (428,000)  $   (383,608)  $    64,654,089   $    20,227,983
   Net realized gains....................      1,850,763        380,832        20,511,061        16,423,720
   Net unrealized gains..................     34,176,685      8,612,162        50,461,971       159,794,143
                                           -------------   ------------   ---------------   ---------------
     Increase in net assets from
      operations.........................  $  35,599,448   $  8,609,386   $   135,627,121   $   196,445,846
                                           -------------   ------------   ---------------   ---------------
 PARTICIPANT TRANSACTIONS:
   Accumulation Activity:
     Purchase payments received..........  $ 156,881,700   $ 44,406,655   $   158,550,497   $   114,688,434
     Net transfers between Sub-Accounts
      and Fixed Account..................     64,021,188     15,859,913         7,794,293        (1,317,333)
     Withdrawals, surrenders,
      annuitizations and contract
      charges............................     (7,956,041)    (1,251,158)      (79,238,642)      (63,409,172)
                                           -------------   ------------   ---------------   ---------------
       Net accumulation activity.........  $ 212,946,847   $ 59,015,410   $    87,106,148   $    49,961,929
                                           -------------   ------------   ---------------   ---------------
   Annuitization Activity:
     Annuitizations......................  $     557,791   $    404,830   $       505,447   $       238,231
     Annuity payments and contract
      charges............................        (62,358)       (20,548)         (762,883)         (656,053)
     Net transfers between
      Sub-Accounts.......................        118,346        (57,959)           56,990            17,486
     Adjustments to annuity reserves.....         38,061         82,075           (87,530)          (16,966)
                                           -------------   ------------   ---------------   ---------------
       Net annuitization activity........  $     651,840   $    408,398   $      (287,976)  $      (417,302)
                                           -------------   ------------   ---------------   ---------------
   Increase in net assets from
    participant transactions.............  $ 213,598,687   $ 59,423,808   $    86,818,172   $    49,544,627
                                           -------------   ------------   ---------------   ---------------
     Increase in net assets..............  $ 249,198,135   $ 68,033,194   $   222,445,293   $   245,990,473
 NET ASSETS:
   Beginning of year.....................     71,904,474      3,871,280     1,024,201,404       778,210,931
                                           -------------   ------------   ---------------   ---------------
   End of year...........................  $ 321,102,609   $ 71,904,474   $ 1,246,646,697   $ 1,024,201,404
                                           -------------   ------------   ---------------   ---------------
                                           -------------   ------------   ---------------   ---------------
 
<CAPTION>
                                                       UTS                   VAL
                                                   Sub-Account           Sub-Account
                                           ---------------------------   ------------
                                                   Year Ended             Year Ended
                                                  December 31,           December 31,
                                           ---------------------------
                                               1996           1995          1996*
                                           ------------   ------------   ------------
 <S>                                       <C>            <C>            <C>
 OPERATIONS:
   Net investment income (expense).......  $  1,926,985   $    270,357   $    (53,621)
   Net realized gains....................     1,617,706        265,908         23,298
   Net unrealized gains..................     6,572,565      7,447,367        744,641
                                           ------------   ------------   ------------
     Increase in net assets from
      operations.........................  $ 10,117,256   $  7,983,632        714,318
                                           ------------   ------------   ------------
 PARTICIPANT TRANSACTIONS:
   Accumulation Activity:
     Purchase payments received..........  $ 18,235,404   $ 12,426,034   $ 10,936,155
     Net transfers between Sub-Accounts
      and Fixed Account..................       835,305      2,364,291      5,122,274
     Withdrawals, surrenders,
      annuitizations and contract
      charges............................    (3,059,763)    (2,335,754)       (63,860)
                                           ------------   ------------   ------------
       Net accumulation activity.........  $ 16,010,946   $ 12,454,571   $ 15,994,569
                                           ------------   ------------   ------------
   Annuitization Activity:
     Annuitizations......................  $    116,582   $     16,672   $    --
     Annuity payments and contract
      charges............................       (18,434)        (7,291)       --
     Net transfers between
      Sub-Accounts.......................       --               9,915        --
     Adjustments to annuity reserves.....       (82,561)        (2,791)       --
                                           ------------   ------------   ------------
       Net annuitization activity........  $     15,587   $     16,505        --
                                           ------------   ------------   ------------
   Increase in net assets from
    participant transactions.............  $ 16,026,533   $ 12,471,076   $ 15,994,569
                                           ------------   ------------   ------------
     Increase in net assets..............  $ 26,143,789   $ 20,454,708   $ 16,708,887
 NET ASSETS:
   Beginning of year.....................    41,793,507     21,338,799        --
                                           ------------   ------------   ------------
   End of year...........................  $ 67,937,296   $ 41,793,507   $ 16,708,887
                                           ------------   ------------   ------------
                                           ------------   ------------   ------------
</TABLE>
 
*For the period June 3, 1996 (commencement of operations) to December 31, 1996.
 
                       See notes to financial statements
 
                                       52
<PAGE>
SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT F
 
STATEMENTS OF CHANGES IN NET ASSETS -- continued
 
<TABLE>
<CAPTION>
                                                  WAA                            WGS                             WGR
                                              Sub-Account                    Sub-Account                     Sub-Account
                                      ---------------------------   -----------------------------   -----------------------------
                                              Year Ended                     Year Ended                      Year Ended
                                             December 31,                   December 31,                    December 31,
                                      ---------------------------   -----------------------------   -----------------------------
                                          1996           1995           1996            1995            1996            1995
                                      ------------   ------------   -------------   -------------   -------------   -------------
 <S>                                  <C>            <C>            <C>             <C>             <C>             <C>
 OPERATIONS:
   Net investment income
    (expense).......................  $    595,575   $   (175,907)  $  16,535,862   $   5,279,650   $   9,576,256   $   1,467,987
   Net realized gains (losses)......     1,629,596        120,590      (2,712,091)         21,142       6,018,165         871,201
   Net unrealized gains (losses)....     4,425,108      2,559,790      (9,808,667)     12,299,610       1,415,056      14,693,578
                                      ------------   ------------   -------------   -------------   -------------   -------------
     Increase in net assets from
      operations....................  $  6,650,279   $  2,504,473   $   4,015,104   $  17,600,402   $  17,009,477   $  17,032,766
                                      ------------   ------------   -------------   -------------   -------------   -------------
 PARTICIPANT TRANSACTIONS:
   Accumulation Activity:
     Purchase payments received.....  $ 33,549,719   $ 14,182,774   $  10,730,732   $  12,226,329   $  40,398,624   $  27,109,744
     Net transfers between
      Sub-Accounts and Fixed
      Account.......................    13,363,954      6,506,983     (13,803,477)     (8,347,691)      3,588,236       5,024,725
     Withdrawals, surrenders,
      annuitizations and contract
      charges.......................    (2,987,226)      (403,056)    (11,401,973)     (8,464,694)     (9,375,496)     (7,221,767)
                                      ------------   ------------   -------------   -------------   -------------   -------------
       Net accumulation activity....  $ 43,926,447   $ 20,286,701   $ (14,474,718)  $  (4,586,056)  $  34,611,364   $  24,912,702
                                      ------------   ------------   -------------   -------------   -------------   -------------
   Annuitization Activity:
     Annuitizations.................  $    174,043   $    --        $      55,515   $       9,873   $     157,641   $     398,205
     Annuity payments and contract
      charges.......................       (17,132)       (10,989)       (171,649)       (159,462)        (71,968)        (48,306)
     Net transfers between
      Sub-Accounts..................       --              78,757         (25,947)       --                13,731           6,845
     Adjustments to annuity
      reserves......................        16,443          5,357          (4,679)         49,038           8,938          42,104
                                      ------------   ------------   -------------   -------------   -------------   -------------
       Net annuitization activity...  $    173,354   $     73,125   $    (146,760)  $    (100,551)  $     108,342   $     398,848
                                      ------------   ------------   -------------   -------------   -------------   -------------
   Increase (decrease) in net assets
    from participant transactions...  $ 44,099,801   $ 20,359,826   $ (14,621,478)  $  (4,686,607)  $  34,719,706   $  25,311,550
                                      ------------   ------------   -------------   -------------   -------------   -------------
     Increase (decrease) in net
      assets........................  $ 50,750,080   $ 22,864,299   $ (10,606,374)  $  12,913,795   $  51,729,183   $  42,344,316
 NET ASSETS:
   Beginning of year................    25,867,417      3,003,118     138,350,259     125,436,464     141,497,630      99,153,314
                                      ------------   ------------   -------------   -------------   -------------   -------------
   End of year......................  $ 76,617,497   $ 25,867,417   $ 127,743,885   $ 138,350,259   $ 193,226,813   $ 141,497,630
                                      ------------   ------------   -------------   -------------   -------------   -------------
                                      ------------   ------------   -------------   -------------   -------------   -------------
</TABLE>
 
                       See notes to financial statements
 
                                       53
<PAGE>
SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT F
 
STATEMENTS OF CHANGES IN NET ASSETS -- continued
 
<TABLE>
<CAPTION>
                                                  WTR
                                              Sub-Account                         Total
                                      ---------------------------   ---------------------------------
                                              Year Ended                       Year Ended
                                             December 31,                     December 31,
                                      ---------------------------   ---------------------------------
                                          1996           1995            1996              1995
                                      ------------   ------------   ---------------   ---------------
 <S>                                  <C>            <C>            <C>               <C>
 OPERATIONS:
   Net investment income
    (expense).......................  $     71,547   $    (87,058)  $   207,607,067   $    58,912,960
   Net realized gains...............       545,390         62,601       106,785,736        33,713,632
   Net unrealized gains.............     2,845,849      1,020,693       196,251,997       460,667,644
                                      ------------   ------------   ---------------   ---------------
     Increase in net assets from
      operations....................  $  3,462,786   $    996,236   $   510,644,800   $   553,294,236
                                      ------------   ------------   ---------------   ---------------
 PARTICIPANT TRANSACTIONS:
   Accumulation Activity:
     Purchase payments received.....  $ 16,294,987   $ 10,064,130   $ 1,231,625,970   $   743,077,138
     Net transfers between
      Sub-Accounts and Fixed
      Account.......................     5,434,372      1,710,064       135,880,112        (2,514,452)
     Withdrawals, surrenders,
      annuitizations and contract
      charges.......................    (1,579,132)      (505,397)     (285,266,526)     (204,045,401)
                                      ------------   ------------   ---------------   ---------------
       Net accumulation activity....  $ 20,150,227   $ 11,268,797   $ 1,082,239,556   $   536,517,285
                                      ------------   ------------   ---------------   ---------------
   Annuitization Activity:
     Annuitizations.................  $    --        $    141,543   $     5,137,173   $     3,662,293
     Annuity payments and contract
      charges.......................       (17,146)        (6,755)       (2,217,120)       (1,663,675)
     Net transfers between
      Sub-Accounts..................       --                (394)              482           (14,834)
     Adjustments to annuity
      reserves......................       (10,126)        15,473          (356,574)          252,645
                                      ------------   ------------   ---------------   ---------------
       Net annuitization activity...  $    (27,272)  $    149,867   $     2,563,961   $     2,236,429
                                      ------------   ------------   ---------------   ---------------
   Increase in net assets from
    participant transactions........  $ 20,122,955   $ 11,418,664   $ 1,084,803,517   $   538,753,714
                                      ------------   ------------   ---------------   ---------------
     Increase in net assets.........  $ 23,585,741   $ 12,414,900   $ 1,595,448,317   $ 1,092,047,950
 NET ASSETS:
   Beginning of year................    13,798,931      1,384,031     3,287,568,735     2,195,520,785
                                      ------------   ------------   ---------------   ---------------
   End of year......................  $ 37,384,672   $ 13,798,931   $ 4,883,017,052   $ 3,287,568,735
                                      ------------   ------------   ---------------   ---------------
                                      ------------   ------------   ---------------   ---------------
</TABLE>
 
                       See notes to financial statements
 
                                       54
<PAGE>
SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT F
 
NOTES TO FINANCIAL STATEMENTS
 
(1) ORGANIZATION
Sun Life of Canada (U.S.) Variable Account F (the "Variable Account"), a
separate account of Sun Life Assurance Company of Canada (U.S.), the Sponsor,
was established on July 13, 1989 as a funding vehicle for the variable portion
of certain group combination fixed/variable annuity contracts. The Variable
Account is registered with the Securities and Exchange Commission under the
Investment Company Act of 1940 as a unit investment trust.
 
The assets of the Variable Account are divided into Sub-Accounts. Each
Sub-Account is invested in shares of a specific series of MFS/Sun Life Series
Trust (the "Series Trust"), an open-end management investment company registered
under the Investment Company Act of 1940. Massachusetts Financial Services
Company, a subsidiary of the Sponsor, is investment adviser to the Series Trust.
 
(2) SIGNIFICANT ACCOUNTING POLICIES
GENERAL
The preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions that
affect the reported amounts of assets and liabilities and disclosure of
contingent assets and liabilities at the date of the financial statements and
the reported amounts of revenue and expenses during the reporting period. Actual
results could differ from those estimates.
 
INVESTMENT VALUATIONS
Investments in shares of the Series Trust are recorded at their net asset value.
Realized gains and losses on sales of shares of the Series Trust are determined
on the identified cost basis. Dividend income and capital gain distributions
received by the Sub-Accounts are reinvested in additional Series Trust shares
and are recognized on the ex-dividend date.
 
Exchanges between Sub-Accounts requested by participants are recorded in the new
Sub-Account upon receipt of the redemption proceeds.
 
FEDERAL INCOME TAX STATUS
The operations of the Variable Account are part of the operations of the Sponsor
and are not taxed separately; the Variable Account is not taxed as a regulated
investment company. The Sponsor qualifies for the federal income tax treatment
granted to life insurance companies under Subchapter L of the Internal Revenue
Code. Under existing federal income tax law, investment income and capital gains
earned by the Variable Account on contract owner reserves are not subject to
tax.
 
(3) CONTRACT CHARGES
A mortality and expense risk charge based on the value of the Variable Account
is deducted from the Variable Account at the end of each valuation period for
the mortality and expense risks assumed by the Sponsor. The deductions are
transferred periodically to the Sponsor. Currently, the deduction is at an
effective annual rate of 1.25% for Regatta and Regatta Gold contracts and 1.00%
for Regatta Classic contracts.
 
                                       55
<PAGE>
SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT F
 
NOTES TO FINANCIAL STATEMENTS -- continued
Each year on the account anniversary, an account administration fee ("Account
Fee") equal to the lesser of $30 or 2% of the participant's account value in the
case of Regatta and Regatta Gold and $50 for Regatta Classic is deducted from
the participant's account to reimburse the Sponsor for certain administrative
expenses. After the annuity commencement date the Account Fee will be deducted
pro rata from each variable annuity payment made during the year.
 
The Sponsor does not deduct a sales charge from purchase payments. However, in
the case of Regatta and Regatta Gold, a withdrawal charge (contingent deferred
sales charge) of up to 6% of certain amounts withdrawn, when applicable, may be
deducted to cover certain expenses relating to the sale of the contracts and
certificates. In the case of Regatta Classic, a withdrawal charge of 1% is
applied to purchase payments withdrawn which have been credited to a
participant's account for less than one year.
 
For assuming the risk that withdrawal charges may be insufficient to compensate
it for the costs of distributing the Regatta contracts, the Sponsor makes a
deduction from the Variable Account at the end of each valuation period for the
first seven account years at an effective annual rate of 0.15% of the net assets
attributable to such contracts. Accounts are transferred from MFS Regatta --
Level 1 to MFS Regatta -- Level 2 in the month following the seventh account
anniversary. No deduction for the distribution expense charge is made after the
seventh account anniversary.
 
As reimbursement for administrative expenses attributable to Regatta Gold and
Regatta Classic contracts which exceed the revenues received from the Account
Fees described above derived from such contracts, the Sponsor makes a deduction
from the Variable Account at the end of each valuation period at an effective
annual rate of 0.15% of the net assets attributable to such contracts.
 
(4) ANNUITY RESERVES
Annuity reserves are calculated using the 1983 Individual Annuitant Mortality
Table and an assumed interest rate of 4% or 3%, as stated in each participant's
certificate. Required adjustments to the reserves are accomplished by transfers
to or from the Sponsor.
 
                                       56
<PAGE>
SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT F
 
NOTES TO FINANCIAL STATEMENTS -- continued
(5) UNIT ACTIVITY FROM PARTICIPANT TRANSACTIONS
<TABLE>
<CAPTION>
                                                                                      Units Transferred
                                                                                  Between Sub-Accounts and
                                   Units Outstanding
                                   Beginning of Year        Units Purchased             Fixed Account
                                 ----------------------  ----------------------  ---------------------------
                                       Year Ended              Year Ended                Year Ended
                                      December 31,            December 31,              December 31,
                                 ----------------------  ----------------------  ---------------------------
                                    1996        1995        1996        1995         1996           1995
                                 ----------  ----------  ----------  ----------  ------------   ------------
 <S>                             <C>         <C>         <C>         <C>         <C>            <C>
 MFS REGATTA CONTRACTS
 ------------------------------
 CAS Sub-Account -- Level 1....   6,615,207   6,184,731       3,487       8,683       267,320      1,002,774
 CAS Sub-Account -- Level 2*...      --          --          62,873      --               142        --
 GSS Sub-Account -- Level 1....   3,535,152   4,235,203       1,574          48       206,595       (289,212)
 GSS Sub-Account -- Level 2*...      --          --          59,729      --             3,442        --
 HYS Sub-Account -- Level 1....   1,068,412     839,825      --          --           271,328        332,946
 MSS Sub-Account -- Level 1....   2,150,361   2,066,642      --          12,503       253,891        206,072
 MSS Sub-Account -- Level 2*...      --          --          18,662      --           --             --
 MMS Sub-Account -- Level 1....   3,453,907   3,873,044       7,940       6,171     1,420,458        315,466
 MMS Sub-Account -- Level 2*...      --          --          74,316      --            (3,576)       --
 TRS Sub-Account -- Level 1....  13,106,997  14,225,539       2,594       4,093       580,878        117,384
 TRS Sub-Account -- Level 2*...      --          --          61,666      --           --             --
 WGS Sub-Account -- Level 1....   1,730,002   1,967,375      --          --            (4,348)       (87,581)
 WGS Sub-Account -- Level 2*...      --          --           4,988      --           --             --
 
<CAPTION>
 
                                     Units Withdrawn,
                                      Surrendered and          Units Outstanding
                                        Annuitized                End of Year
                                 -------------------------   ----------------------
                                        Year Ended                 Year Ended
                                       December 31,               December 31,
                                 -------------------------   ----------------------
                                    1996          1995          1996        1995
                                 -----------   -----------   ----------  ----------
 <S>                             <C>           <C>           <C>         <C>
 MFS REGATTA CONTRACTS
 ------------------------------
 CAS Sub-Account -- Level 1....     (569,709)     (580,981)   6,316,305   6,615,207
 CAS Sub-Account -- Level 2*...       (4,047)      --            58,968      --
 GSS Sub-Account -- Level 1....     (380,671)     (410,887)   3,362,650   3,535,152
 GSS Sub-Account -- Level 2*...       (7,280)      --            55,891      --
 HYS Sub-Account -- Level 1....     (135,360)     (104,359)   1,204,380   1,068,412
 MSS Sub-Account -- Level 1....     (202,039)     (134,856)   2,202,213   2,150,361
 MSS Sub-Account -- Level 2*...       (4,392)      --            14,270      --
 MMS Sub-Account -- Level 1....   (1,022,567)     (740,774)   3,859,738   3,453,907
 MMS Sub-Account -- Level 2*...      (11,178)      --            59,562      --
 TRS Sub-Account -- Level 1....   (1,229,466)   (1,240,019)  12,461,003  13,106,997
 TRS Sub-Account -- Level 2*...      (29,118)      --            32,548      --
 WGS Sub-Account -- Level 1....     (265,365)     (149,792)   1,460,289   1,730,002
 WGS Sub-Account -- Level 2*...       (1,663)      --             3,325      --
</TABLE>
 
*For the period December 9, 1996 (commencement of operations) to December 31,
1996.
 
                                       57
<PAGE>
SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT F
 
NOTES TO FINANCIAL STATEMENTS -- continued
 
(5) UNIT ACTIVITY FROM PARTICIPANT TRANSACTIONS -- continued
<TABLE>
<CAPTION>
                                                                                      Units Transferred
                                                                                  Between Sub-Accounts and
                                   Units Outstanding
                                   Beginning of Year        Units Purchased             Fixed Account
                                 ----------------------  ----------------------  ---------------------------
                                       Year Ended              Year Ended                Year Ended
                                      December 31,            December 31,              December 31,
                                 ----------------------  ----------------------  ---------------------------
                                    1996        1995        1996        1995         1996           1995
                                 ----------  ----------  ----------  ----------  ------------   ------------
 <S>                             <C>         <C>         <C>         <C>         <C>            <C>
 
 MFS REGATTA GOLD CONTRACTS
 ------------------------------
 CAS Sub-Account...............  27,782,739  19,909,649   7,263,696   7,106,728      (496,244)     2,287,026
 CGS Sub-Account...............  16,712,586  10,979,711   8,644,701   5,181,021     2,000,284      1,359,507
 EGS Sub-Account*..............   5,346,104      --       8,728,028   2,978,021     3,530,938      2,420,603
 FCG Sub-Account**.............     711,179      --       1,891,793     414,060       856,286        301,717
 FCI Sub-Account***............      --          --         250,279      --           323,501        --
 FCE Sub-Account***............      --          --         107,088      --           224,483        --
 GSS Sub-Account...............  18,082,586  18,784,262   4,278,441   3,836,496    (1,392,606)    (3,241,260)
 HYS Sub-Account...............   6,880,080   4,605,818   2,241,058   1,439,990       (53,191)     1,286,018
 MSS Sub-Account...............   8,542,869   6,351,641   2,422,482   2,269,426       147,148        411,655
 MMS Sub-Account...............  17,186,041  14,774,386  18,886,918  16,108,059    (5,479,056)   (11,138,037)
 RES Sub-Account...............   5,341,160     392,528  10,525,524   3,726,811     4,302,978      1,346,160
 TRS Sub-Account...............  53,091,748  48,270,556  10,291,268   8,512,923      (170,571)      (391,980)
 UTS Sub-Account...............   3,410,047   2,273,439   1,448,517   1,164,148        68,243        204,917
 VAL Sub-Account****...........      --          --       1,039,259      --           492,924        --
 WAA Sub-Account...............   2,141,041     299,210   2,590,553   1,294,348     1,048,013        590,509
 WGS Sub-Account...............   8,272,858   8,334,019     818,386     981,591    (1,036,800)      (532,375)
 WGR Sub-Account...............  11,421,691   9,182,555   3,069,026   2,422,350       227,986        475,925
 WTR Sub-Account...............   1,170,586     138,126   1,353,637     922,160       448,221        159,909
 
<CAPTION>
 
                                     Units Withdrawn,
                                      Surrendered and          Units Outstanding
                                        Annuitized                End of Year
                                 -------------------------   ----------------------
                                        Year Ended                 Year Ended
                                       December 31,               December 31,
                                 -------------------------   ----------------------
                                    1996          1995          1996        1995
                                 -----------   -----------   ----------  ----------
 <S>                             <C>           <C>           <C>         <C>
 MFS REGATTA GOLD CONTRACTS
 ------------------------------
 CAS Sub-Account...............   (1,753,398)   (1,520,664)  32,796,793  27,782,739
 CGS Sub-Account...............   (1,157,596)     (807,653)  26,199,975  16,712,586
 EGS Sub-Account*..............     (607,026)      (52,520)  16,998,044   5,346,104
 FCG Sub-Account**.............      (98,662)       (4,598)   3,360,596     711,179
 FCI Sub-Account***............       (9,038)      --           564,742      --
 FCE Sub-Account***............       (1,941)      --           329,630      --
 GSS Sub-Account...............   (1,254,307)   (1,296,912)  19,714,114  18,082,586
 HYS Sub-Account...............     (643,658)     (451,746)   8,424,289   6,880,080
 MSS Sub-Account...............     (570,773)     (489,853)  10,541,726   8,542,869
 MMS Sub-Account...............   (3,318,320)   (2,558,367)  27,275,583  17,186,041
 RES Sub-Account...............     (591,917)     (124,339)  19,577,745   5,341,160
 TRS Sub-Account...............   (3,704,429)   (3,299,751)  59,508,016  53,091,748
 UTS Sub-Account...............     (255,615)     (232,457)   4,671,192   3,410,047
 VAL Sub-Account****...........      (11,396)      --         1,520,787      --
 WAA Sub-Account...............     (240,597)      (43,026)   5,539,010   2,141,041
 WGS Sub-Account...............     (543,678)     (510,377)   7,510,766   8,272,858
 WGR Sub-Account...............     (728,757)     (659,139)  13,989,946  11,421,691
 WTR Sub-Account...............     (136,365)      (49,609)   2,836,079   1,170,586
</TABLE>
 
   *1995 activity is for the period May 1, 1995 (commencement of operations) to
December 31, 1995.
  **1995 activity is for the period October 4, 1995 (commencement of operations)
to December 31, 1995.
 ***For the period July 1, 1996 (commencement of operations) to December 31,
1996.
****For the period June 3, 1996 (commencement of operations) to December 31,
1996.
 
                                       58
<PAGE>
SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT F
 
NOTES TO FINANCIAL STATEMENTS -- continued
 
(5) UNIT ACTIVITY FROM PARTICIPANT TRANSACTIONS -- continued
 
<TABLE>
<CAPTION>
                                                            Units
                                                         Transferred       Units
                                   Units                 Between Sub-   Withdrawn,      Units
                                 Outstanding             Accounts and   Surrendered   Outstanding
                                 Beginning     Units        Fixed           and         End of
                                 of Period   Purchased     Account      Annuitized      Period
                                 ----------  ----------  ------------   -----------   ----------
 
 MFS REGATTA CLASSIC CONTRACTS
 ------------------------------
 <S>                             <C>         <C>         <C>            <C>           <C>
 CAS Sub-Account*..............    --          1,892         --             --          1,892
 CGS Sub-Account*..............    --          8,005          (4,460)       --          3,545
 EGS Sub-Account*..............    --         11,935          (2,191)       --          9,744
 FCI Sub-Account**.............    --          2,249         --             --          2,249
 FCE Sub-Account**.............    --            352            (212)       --            140
 GSS Sub-Account**.............    --          6,514         --             --          6,514
 HYS Sub-Account*..............    --          7,097           1,122        --          8,219
 MMS Sub-Account**.............    --         13,813         --             --         13,813
 RES Sub-Account***............    --         25,659               6        --         25,665
 TRS Sub-Account***............    --         33,797           6,778        --         40,575
 VAL Sub-Account*..............    --          8,416           1,162        --          9,578
 WAA Sub-Account*..............    --          7,086            (638)       --          6,448
 WGR Sub-Account****...........    --          --                 71        --             71
</TABLE>
 
   *For the period December 2, 1996 (commencement of operations) to December 31,
1996.
  **For the period December 9, 1996 (commencement of operations) to December 31,
1996.
 ***For the period November 27, 1996 (commencement of operations) to December
31, 1996.
****Operations commenced on December 31, 1996.
 
                                       59
<PAGE>
INDEPENDENT AUDITORS' REPORT
 
To the Participants in Sun Life of Canada (U.S.) Variable Account F
 and the Board of Directors of Sun Life Assurance Company of Canada (U.S.):
 
We have audited the accompanying statement of condition of Sun Life of Canada
(U.S.) Variable Account F (the "Variable Account") as of December 31, 1996, the
related statement of operations for the year then ended and the statements of
changes in net assets for the years ended December 31, 1996 and 1995. These
financial statements are the responsibility of management. Our responsibility is
to express an opinion on these financial statements based on our audits.
 
We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. Our procedures included
confirmation of securities held at December 31, 1996 by correspondence with the
custodian. An audit also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for our opinion.
 
In our opinion, such financial statements present fairly, in all material
respects, the financial position of the Variable Account as of December 31,
1996, the results of its operations and the changes in its net assets for the
respective stated periods in conformity with generally accepted accounting
principles.
 
DELOITTE & TOUCHE LLP
 
Boston, Massachusetts
February 7, 1997
 
                                       60
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life Assurance Company of Canada)
 
STATUTORY STATEMENTS OF ADMITTED ASSETS, LIABILITIES AND
CAPITAL STOCK AND SURPLUS
 
<TABLE>
<CAPTION>
                                                                                       DECEMBER 31,
                                                                              ------------------------------
                                                                                   1996            1995
                                                                              --------------  --------------
                                                                                        (IN 000'S)
<S>                                                                           <C>             <C>
ADMITTED ASSETS
    Bonds                                                                     $    2,258,858  $    2,706,067
    Preferred stock                                                                        0           1,149
    Mortgage loans                                                                   938,932       1,066,911
    Investments in subsidiaries                                                      144,043         138,282
    Real estate                                                                      100,385          95,574
    Other invested assets                                                             51,378          38,387
    Policy loans                                                                      40,554          38,355
    Cash                                                                               1,305         (20,280)
    Investment income due and accrued                                                 68,190          62,719
    Funds withheld on reinsurance assumed                                            878,798         741,091
    Due from separate accounts                                                       220,999         148,675
    Other assets                                                                      27,509          26,349
                                                                              --------------  --------------
    General account assets                                                         4,730,951       5,043,279
    Unitized separate account assets                                               6,919,219       5,275,808
    Non-unitized separate account assets                                           2,108,835       2,040,596
                                                                              --------------  --------------
    Total Assets                                                              $   13,759,005  $   12,359,683
                                                                              --------------  --------------
                                                                              --------------  --------------
LIABILITIES
    Policy reserves                                                           $    2,099,980  $    1,937,302
    Annuity and other deposits                                                     1,898,309       2,290,656
    Policy benefits in process of payment                                              2,677           5,884
    Accrued expenses and taxes                                                        57,719          44,114
    Other liabilities                                                                 63,987          36,080
    Due to (from) parent and affiliates--net                                         (41,326)       (130,502)
    Interest maintenance reserve                                                      28,676          25,218
    Asset valuation reserve                                                           53,911          42,099
                                                                              --------------  --------------
    General account liabilities                                                    4,163,933       4,250,851
    Unitized separate account liabilities                                          6,919,094       5,275,784
    Non-unitized separate account liabilities                                      2,108,835       2,040,596
                                                                              --------------  --------------
                                                                                  13,191,862      11,567,231
                                                                              --------------  --------------
CAPITAL STOCK AND SURPLUS
    Capital Stock Par value $1,000:
       Authorized, 10,000 shares;
        issued and outstanding, 5,900 shares                                           5,900           5,900
    Surplus                                                                          561,243         786,552
                                                                              --------------  --------------
    Total capital stock and surplus                                                  567,143         792,452
                                                                              --------------  --------------
    Total Liabilities, Capital Stock and Surplus                              $   13,759,005  $   12,359,683
                                                                              --------------  --------------
                                                                              --------------  --------------
</TABLE>
 
                  SEE NOTES TO STATUTORY FINANCIAL STATEMENTS.
 
                                       61
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
 
(Wholly-owned subsidiary of Sun Life Assurance Company of Canada)
 
STATUTORY STATEMENTS OF OPERATIONS
 
<TABLE>
<CAPTION>
                                                YEARS ENDED DECEMBER 31,
                                           ----------------------------------
                                              1996        1995        1994
                                           ----------  ----------  ----------
 <S>                                       <C>         <C>         <C>
                                                       (IN 000'S)
 Premiums and annuity considerations       $  282,466  $  279,407  $  316,008
 Deposit-type funds                         1,775,230   1,545,542   1,647,623
 Considerations for supplementary
  contracts without life contingencies
  and dividend accumulations                    2,340       1,088       2,906
 Net investment income                        303,753     312,872     315,433
 Amortization of interest maintenance
  reserve                                       1,557       1,025       4,128
 Miscellaneous income                          71,903      57,864      30,988
                                           ----------  ----------  ----------
 Total                                      2,437,249   2,197,798   2,317,086
                                           ----------  ----------  ----------
 Death benefits                                12,394      15,317       4,836
 Annuity benefits                             146,654     140,497     135,256
 Surrender benefits and other fund
  withdrawals                               1,507,263   1,074,396     965,186
 Interest on policy or contract funds           2,205         739         572
 Payments on supplementary contracts
  without life contingencies and of
  dividend accumulations                        2,120       1,888       2,334
 Increase in aggregate reserves for life
  and accident and health policies and
  contracts                                   162,678     171,975     219,334
 Increase in liability for premium and
  other deposit funds                        (392,348)     13,553     (69,541)
 Increase in reserve for supplementary
  contracts without life contingencies
  and for dividend and coupon
  accumulations                                   327        (663)        714
                                           ----------  ----------  ----------
 Total                                      1,441,293   1,417,702   1,258,691
 Commissions on premiums and annuity
  considerations (direct business only)       109,894      88,037      93,576
 Commissions and expense allowances on
  reinsurance assumed                          18,910      22,012      59,085
 General insurance expenses                    37,206      34,580      31,243
 Insurance taxes, licenses and fees,
  excluding federal income taxes                8,431       7,685       5,638
 Increase in loading on and cost of
  collection in excess of loading on
  deferred and uncollected premiums               901      (1,377)     (2,650)
 Net transfers to Separate Account            678,663     551,784     820,671
                                           ----------  ----------  ----------
 Total                                      2,295,298   2,120,423   2,266,254
                                           ----------  ----------  ----------
 Net gain from operations before
  dividends to policyholders and federal
  income tax                                  141,951      77,375      50,832
 Dividends to policyholders                    29,189      25,722      22,928
                                           ----------  ----------  ----------
 Net gain from operations after dividends
  to policyholders and before federal
  income tax                                  112,762      51,653      27,904
 Federal income taxes incurred (excluding
  tax on capital gains)                        (2,702)     17,807      19,469
                                           ----------  ----------  ----------
 Net gain from operations after dividends
  to policyholders and federal income tax
  and before realized capital gains or
  (losses)                                    115,464      33,846       8,435
 Net realized capital gains or (losses)
  less capital gains tax and transferred
  to the interest maintenance reserve           7,560       2,069      (6,978)
                                           ----------  ----------  ----------
 NET INCOME                                $  123,024  $   35,915  $    1,457
                                           ----------  ----------  ----------
                                           ----------  ----------  ----------
</TABLE>
 
                  SEE NOTES TO STATUTORY FINANCIAL STATEMENTS.
 
                                       62
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
 
(Wholly-owned subsidiary of Sun Life Assurance Company of Canada)
 
STATUTORY STATEMENTS OF CHANGES IN CAPITAL STOCK AND SURPLUS
 
<TABLE>
<CAPTION>
                                                                 YEARS ENDED DECEMBER 31,
                                                            ----------------------------------
                                                               1996        1995        1994
                                                            ----------  ----------  ----------
<S>                                                         <C>         <C>         <C>
                                                                        (IN 000'S)
CAPITAL AND SURPLUS, BEGINNING OF YEAR                      $  792,452  $  455,489  $  483,188
                                                            ----------  ----------  ----------
Net income                                                     123,024      35,915       1,457
Change in net unrealized capital gains or (losses)              (1,715)      2,009        (671)
Change in non-admitted assets and related items                     67      (2,270)     (1,485)
Change in asset valuation reserve                              (11,812)    (13,690)     (8,376)
Other changes in surplus in Separate Accounts Statement            100      (4,038)       (227)
Increase (decrease) in surplus notes                          (335,000)    315,000           0
Miscellaneous gains and losses in surplus                           27       4,037     (18,397)
                                                            ----------  ----------  ----------
Net change in capital and surplus for the year                (225,309)    336,963     (27,699)
                                                            ----------  ----------  ----------
Capital and surplus, end of year                            $  567,143  $  792,452  $  455,489
                                                            ----------  ----------  ----------
                                                            ----------  ----------  ----------
</TABLE>
 
                  SEE NOTES TO STATUTORY FINANCIAL STATEMENTS.
 
                                       63
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life Assurance Company of Canada)
STATUTORY STATEMENTS OF CASH FLOW
 
<TABLE>
<CAPTION>
                                                  YEARS ENDED DECEMBER 31,
                                            -------------------------------------
                                               1996         1995         1994
                                            -----------  -----------  -----------
 <S>                                        <C>          <C>          <C>
                                                         (IN 000'S)
 Cash Provided
   Premiums, annuity considerations and
     deposit funds received                 $ 2,059,577  $ 1,826,456  $ 2,287,695
   Considerations for supplementary
     contracts and dividend accumulations
     received                                     2,340        1,088        2,906
   Net investment income received               324,914      374,398      351,058
   Other income received                         88,295       25,348       30,989
                                            -----------  -----------  -----------
 Total receipts                               2,475,126    2,227,290    2,672,648
                                            -----------  -----------  -----------
   Benefits paid (other than dividends)       1,671,483    1,231,936    1,326,223
   Insurance expenses and taxes paid
     (other than federal income and
     capital gains taxes)                       172,015      150,463      187,699
   Net cash transfers to Separate Accounts      755,605      568,188      963,127
   Dividends paid to policyholders               22,689       17,722       13,303
   Federal income tax (recoveries)
     payments (excluding tax on capital
     gains)                                     (15,363)     (20,655)       2,976
   Other--net                                     2,205          739          572
                                            -----------  -----------  -----------
 Total payments                               2,608,634    1,948,393    2,493,900
                                            -----------  -----------  -----------
 Net cash from operations                      (133,508)     278,897      178,748
                                            -----------  -----------  -----------
   Proceeds from long-term investments
     sold, matured or repaid (after
     deducting taxes on capital gains of
     $1,554,873 for 1996, $8,610,951 for
     1995 and $19,271,876 for 1994)           1,768,147    1,658,655    1,508,156
   Issuance (repayment) of surplus notes       (335,000)     315,000
   Other cash provided                          147,956      419,446       26,512
                                            -----------  -----------  -----------
 Total cash provided                          1,581,103    2,393,101    1,534,668
                                            -----------  -----------  -----------
 Cash Applied
   Cost of long-term investments acquired     1,318,880    1,749,714    1,442,155
   Other cash applied                           235,982      796,207      264,233
                                            -----------  -----------  -----------
 Total cash applied                           1,554,862    2,545,921    1,706,388
                                            -----------  -----------  -----------
 Net change in cash and short-term
   investments                                 (107,267)     126,077        7,028
 Cash and short-term investments:
 Beginning of year                              197,326       71,249       64,221
                                            -----------  -----------  -----------
 End of year                                $    90,059  $   197,326  $    71,249
                                            -----------  -----------  -----------
                                            -----------  -----------  -----------
</TABLE>
 
                  SEE NOTES TO STATUTORY FINANCIAL STATEMENTS.
 
                                       64
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life Assurance Company of Canada)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS
YEARS ENDED DECEMBER 31, 1996, 1995 AND 1994
 
1.  DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:
 
GENERAL
 
Sun Life Assurance Company of Canada (U.S.) (the "Company") is incorporated as a
life insurance company and is currently engaged in the sale of individual fixed
and variable annuities, group fixed and variable annuities and group pension
contracts. The Company also underwrites a block of individual life insurance
business through a reinsurance contract with its parent. Sun Life Assurance
Company of Canada (the "parent company") is a mutual life insurance company.
 
The Company, which is domiciled in the State of Delaware, prepares its financial
statements in accordance with statutory accounting practices prescribed or
permitted by the State of Delaware Insurance Department. Prescribed accounting
practices include practices described in a variety of publications of the
National Association of Insurance Commissioners (NAIC), as well as state laws,
regulations and general administrative rules. Permitted accounting practices
encompass all accounting practices not so prescribed. The permitted accounting
practices adopted by the Company are not material to the financial statements.
Prior to 1996, statutory accounting practices were recognized by the insurance
industry and the accounting profession as generally accepted accounting
principles for mutual life insurance companies and stock life insurance
companies wholly owned by mutual life insurance companies. In April 1993, the
Financial Accounting Standards Board ("FASB") issued an interpretation (the
"Interpretation"), that became effective in 1996, that has changed the previous
practice of mutual life insurance companies (and stock life insurance companies
that are wholly-owned subsidiaries of mutual life insurance companies) with
respect to utilizing statutory basis financial statements for general purposes,
in that it will no longer allow such financial statements to be described as
having been prepared in conformity with generally accepted accounting principles
("GAAP"). Consequently, these financial statements prepared in conformity with
statutory accounting practices as described above, vary from and are not
intended to present the Company's financial position and results of operations
and capital in conformity with generally accepted accounting principles. (See
Note 19 for further discussion relative to the Company's basis of financial
statement presentation.) The effects on the financial statements of the
variances between the statutory basis of accounting and GAAP, although not
reasonably determinable, are presumed to be material.
 
INVESTED ASSETS AND RELATED RESERVES
 
Bonds are carried at cost adjusted for amortization of premium or accrual of
discount. Investments in non-insurance subsidiaries are carried on the equity
basis. Investments in insurance subsidiaries are carried at their statutory
surplus values. Mortgage loans acquired at a premium or discount are carried at
amortized values and other mortgage loans at the amounts of the unpaid balances.
Real estate investments are carried at the lower of cost adjusted for
accumulated depreciation or appraised value, less encumbrances. Short-term
investments are carried at amortized cost, which approximates fair value.
Depreciation of buildings and improvements is calculated using the straight-line
method over the estimated useful life of the property, generally 40 to 50 years.
 
POLICY AND CONTRACT RESERVES
 
The reserves for life insurance and annuity contracts, developed by accepted
actuarial methods, have been established and maintained on the basis of
published mortality tables using assumed interest rates and valuation methods
that will provide reserves at least as great as those required by law and
contract provisions.
 
                                       65
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life Assurance Company of Canada)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1996, 1995 AND 1994
 
1.  DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING
POLICIES (CONTINUED):
INCOME AND EXPENSES
 
For life and annuity contracts, premiums are recognized as revenues over the
premium paying period, whereas commissions and other costs applicable to the
acquisition of new business are charged to operations as incurred.
 
SEPARATE ACCOUNTS
 
The Company has established unitized separate accounts applicable to various
classes of contracts providing for variable benefits. Contracts for which funds
are invested in separate accounts include variable life insurance and individual
and group qualified and non-qualified variable annuity contracts.
 
Assets and liabilities of the separate accounts, representing net deposits and
accumulated net investment earnings less fees, held primarily for the benefit of
contract holders are shown as separate captions in the financial statements.
Assets held in the separate accounts are carried at market values.
 
The Company has also established a non-unitized separate account for amounts
allocated to the fixed portion of certain combination fixed/variable deferred
annuity contracts. The assets of this account are available to fund general
account liabilities and general account assets are available to fund liabilities
of this account.
 
Gains (losses) from mortality experience and investment experience, not
applicable to contract owners, are transferred to (from) the general account.
Accumulated gains (losses) that have not been transferred are recorded as a
payable (receivable) to (from) the general account. Amounts payable to the
general account of the Company were $220,999,000 in 1996 and $148,675,000 in
1995.
 
CHANGES IN ACCOUNTING PRINCIPLES AND REPORTING
 
During 1996, the Company changed its method of accounting and reporting for
deposits, withdrawals, and benefits with respect to unitized separate accounts.
Previously, deposits were recorded as direct increases in liabilities of the
separate accounts while withdrawals and benefits were recorded as direct
decreases in that liability. Effective for 1996, the Company recorded: deposits
as revenue in the general account; withdrawals and benefits as expenses in the
general account; and the transfer of those funds between the general account and
the separate account are reflected as an expense (income) item. Amounts
presented for the years ended December 31, 1995 and 1994 have been restated to
conform to this presentation. The effect of this change was to increase revenues
and expenses by $1.4 billion in 1996, $878 million in 1995, and $988 million in
1994; there is no impact on net income of the general account. This new method
of reporting is consistent with the accounting treatment for deposits and
withdrawals and benefits of the non-unitized separate account of the Company,
and is consistent with prescribed statutory accounting practices.
 
Prior to 1996, dividends paid to the Company by its subsidiaries and the
undistributed gains (losses) of those subsidiaries were included in net income
of the Company. For Annual Statement reporting, dividends were (and continue to
be) reported in net income while undistributed gains (losses) are reported
directly to surplus (as a separate component of unassigned surplus). As a
result, net income as reported in these financial statements is $2.5 million
less than net income reported in the Annual Statement in 1995 and $1.4 million
greater than the Annual Statement in 1994. Effective for 1996, the Company
changed its method of accounting for investments in subsidiaries to conform with
the prescribed statutory accounting practices used in the preparation of its
Annual Statement. As a result of the change, $5.7 million in undistributed
losses of subsidiaries are reported directly as a separate component of
unassigned surplus rather than being included in net income for the year ended
December 31, 1996. The amounts as reported in prior years have not been
restated.
 
                                       66
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life Assurance Company of Canada)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1996, 1995 AND 1994
 
1.  DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING
POLICIES (CONTINUED):
The Company has also revised the form of its statutory statements of operations,
changes in capital stock and surplus, and cash flow in order to match more
exactly the presentation used in the preparation of its Annual Statement. As a
result, reclassifications have been made in the amounts reported in 1995 and
1994 audited financial statements to conform to the presentation used for the
1996 amounts. Other than as described in the preceding paragraph, none of the
changes have impacted net income or statutory surplus as reported in the 1995
and 1994 audited financial statements.
 
OTHER
 
Preparation of the financial statements requires management to make estimates
and assumptions that affect reported amounts of assets, liabilities, revenues
and expenses. Actual results could differ from those estimates.
 
2.  INVESTMENTS IN SUBSIDIARIES:
The Company owns all of the outstanding shares of Sun Life Insurance and Annuity
Company of New York (Sun Life (N.Y.)), Massachusetts Casualty Insurance Company
(MCIC), Sun Investment Services Company (Sunesco), New London Trust, F.S.B.
(NLT), Sun Life Financial Services Limited, Inc. (SLFSL), Sun Benefit Services
Company, Inc. (Sunbesco), Sun Capital Advisers, Inc. (Sun Capital), and Sun Life
Finance Corporation (Sunfinco).
 
The Company owns 94.8% of the outstanding shares of Massachusetts Financial
Services Company (MFS). The Company previously owned 100% of the shares. During
1996, MFS issued additional shares to officers of MFS, thereby reducing the
Company's ownership to 94.8%.
 
Sun Life (N.Y.) is engaged in the sale of individual fixed and variable annuity
contracts and group life and disability insurance contracts in the State of New
York. MCIC is a life insurance company which issues only individual disability
income policies. Sunesco is a registered investment adviser and broker-dealer.
NLT is a federally chartered savings bank. SLFSL serves as the marketing
administrator for the distribution of the Parent company's offshore products.
Sun Capital, a registered investment adviser, Sunfinco, and Sunbesco are
currently inactive.
 
MFS, a registered investment adviser, serves as investment adviser to the mutual
funds in the MFS family of funds and certain mutual funds and separate accounts
established by the Company, and, through a subsidiary, provides investment
advice to substantial private clients.
 
In 1994, the Company reduced its carrying value of MCIC by $18,397,000, the
unamortized amount of goodwill. The reduction was accounted for as a direct
charge to surplus.
 
On December 31, 1996, the Company issued to the parent a $58,000,000 note which
is scheduled for repayment on February 15, 1997 at an interest rate of 5.70%.
Also on December 31, 1996, the Company was issued a $58,000,000 note by MFS at
an interest rate of 5.76% due on demand on or after March 1, 1997. On December
31, 1996 and 1995 the Company had an additional $20,000,000 in notes issued by
MFS, scheduled to mature in 2000. All of these notes are reported as due from
parent and affiliates.
 
During 1996, 1995 and 1994, the Company contributed capital in the following
amounts to its subsidiaries:
 
<TABLE>
<CAPTION>
                                                                           1996           1995          1994
                                                                      --------------  ------------  ------------
<S>                                                                   <C>             <C>           <C>
MCIC                                                                  $   10,000,000  $  6,000,000  $  6,000,000
SLFSL                                                                      1,500,000             0             0
</TABLE>
 
                                       67
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life Assurance Company of Canada)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1996, 1995 AND 1994
 
2.  INVESTMENTS IN SUBSIDIARIES (CONTINUED):
Summarized combined financial information of the Company's subsidiaries as of
December 31, 1996, 1995 and 1994 and for the years then ended, follows:
 
<TABLE>
<CAPTION>
                                                                                       DECEMBER 31,
                                                                         ----------------------------------------
                                                                             1996          1995          1994
                                                                         ------------  ------------  ------------
                                                                                        (IN 000'S)
<S>                                                                      <C>           <C>           <C>
Intangible assets                                                        $      9,646  $     12,174  $     13,485
Other assets                                                                1,376,014     1,233,372     1,165,595
Liabilities                                                                (1,241,617)   (1,107,264)   (1,044,273)
                                                                         ------------  ------------  ------------
Total net assets                                                         $    144,043  $    138,282  $    134,807
                                                                         ------------  ------------  ------------
                                                                         ------------  ------------  ------------
Total revenues                                                           $    717,280  $    570,794  $    495,097
Operating expenses                                                           (624,199)     (504,070)     (425,891)
Income tax expense                                                            (42,820)      (31,193)      (29,374)
                                                                         ------------  ------------  ------------
Net income                                                               $     50,261  $     35,531  $     39,832
                                                                         ------------  ------------  ------------
                                                                         ------------  ------------  ------------
</TABLE>
 
3.  BONDS:
The amortized cost and estimated fair value of investments in debt securities
are as follows:
 
<TABLE>
<CAPTION>
                                                                             DECEMBER 31, 1996
                                                            ----------------------------------------------------
                                                                             GROSS        GROSS      ESTIMATED
                                                             AMORTIZED    UNREALIZED   UNREALIZED       FAIR
                                                                COST         GAINS      (LOSSES)       VALUE
                                                            ------------  -----------  -----------  ------------
 
<S>                                                         <C>           <C>          <C>          <C>
                                                                                 (IN 000'S)
Long-term Bonds:
    United States government and government agencies and
     authorities                                            $    267,756   $  12,272    $  (8,927)  $    271,101
    States, provinces and political subdivisions                   2,253          20           (0)         2,273
    Foreign governments                                           18,812       1,351           (0)        20,163
    Public utilities                                             415,641      24,728       (1,223)       439,146
    Transportation                                               167,937      14,107       (2,243)       179,801
    Finance                                                      290,025       7,912         (472)       297,465
    All other corporate bonds                                  1,007,680      42,338      (14,496)     1,035,522
                                                            ------------  -----------  -----------  ------------
        Total long-term bonds                                  2,170,104     102,728      (27,361)     2,245,471
Short-term bonds:
    U.S. Treasury Bills, bankers acceptances and
     commercial paper                                             88,754           0            0         88,754
                                                            ------------  -----------  -----------  ------------
                                                            $  2,258,858   $ 102,728    $ (27,361)  $  2,334,225
                                                            ------------  -----------  -----------  ------------
                                                            ------------  -----------  -----------  ------------
</TABLE>
 
                                       68
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life Assurance Company of Canada)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1996, 1995 AND 1994
 
3.  BONDS (CONTINUED):
 
<TABLE>
<CAPTION>
                                                                            DECEMBER 31, 1995
                                                          -----------------------------------------------------
                                                                           GROSS        GROSS       ESTIMATED
                                                           AMORTIZED    UNREALIZED    UNREALIZED       FAIR
                                                              COST         GAINS       (LOSSES)       VALUE
                                                          ------------  -----------  ------------  ------------
 
<S>                                                       <C>           <C>          <C>           <C>
                                                                               (IN 000'S)
Long-term Bonds:
    United States government and government agencies and
     authorities                                          $    467,597   $  22,783   $       (443) $    489,937
    States, provinces and political subdivisions                 2,252          81             (0)        2,333
    Foreign governments                                         38,303       4,551             (6)       42,848
    Public utilities                                           513,704      45,466           (203)      558,967
    Transportation                                             215,786      22,794         (2,221)      236,359
    Finance                                                    225,074      13,846            (84)      238,836
    All other corporate bonds                                1,025,745      67,371         (7,415)    1,085,701
                                                          ------------  -----------  ------------  ------------
        Total long-term bonds                                2,488,461     176,892        (10,372)    2,654,981
Short-term bonds:
    U.S. Treasury Bills, bankers acceptances and
     commercial paper                                          217,606           0              0       217,606
                                                          ------------  -----------  ------------  ------------
                                                          $  2,706,067   $ 176,892   $    (10,372) $  2,872,587
                                                          ------------  -----------  ------------  ------------
                                                          ------------  -----------  ------------  ------------
</TABLE>
 
The amortized cost and estimated fair value of bonds at December 31, 1996 and
1995 are shown below by contractual maturity. Expected maturities will differ
from contractual maturities because borrowers may have the right to call or
prepay obligations with or without call and/or prepayment penalties.
 
<TABLE>
<CAPTION>
                                                                                           DECEMBER 31, 1996
                                                                                       --------------------------
                                                                                        AMORTIZED     ESTIMATED
                                                                                           COST       FAIR VALUE
                                                                                       ------------  ------------
<S>                                                                                    <C>           <C>
                                                                                               (IN 000'S)
Maturities:
    Due in one year or less                                                            $    314,130  $    315,507
    Due after one year through five years                                                   743,215       751,858
    Due after five years through ten years                                                  268,376       280,153
    Due after ten years                                                                     714,504       775,051
                                                                                       ------------  ------------
                                                                                       $  2,040,225  $  2,122,569
    Mortgage-backed securities                                                              218,633       211,656
                                                                                       ------------  ------------
                                                                                       $  2,258,858  $  2,334,225
                                                                                       ------------  ------------
                                                                                       ------------  ------------
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                           DECEMBER 31, 1995
                                                                                       --------------------------
                                                                                        AMORTIZED     ESTIMATED
                                                                                           COST       FAIR VALUE
                                                                                       ------------  ------------
<S>                                                                                    <C>           <C>
                                                                                               (IN 000'S)
Maturities:
    Due in one year or less                                                            $    558,775  $    561,119
    Due after one year through five years                                                   824,446       846,230
    Due after five years through ten years                                                  256,552       269,549
    Due after ten years                                                                     884,187     1,000,908
                                                                                       ------------  ------------
                                                                                          2,523,960     2,677,806
    Mortgage-backed securities                                                              182,107       194,781
                                                                                       $  2,706,067  $  2,872,587
                                                                                       ------------  ------------
                                                                                       ------------  ------------
</TABLE>
 
                                       69
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life Assurance Company of Canada)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1996, 1995 AND 1994
 
3.  BONDS (CONTINUED):
Proceeds from sales and maturities of investments in debt securities during
1996, 1995, and 1994 were $1,554,016,000, $1,510,553,000, and $1,390,974,000,
gross gains were $16,975,000, $24,757,000, and $15,025,000 and gross losses were
$10,885,000, $5,742,000, and $30,041,000 , respectively.
 
Bonds included above with an amortized cost of approximately $2,060,000 and
$2,059,000 at December 31, 1996 and 1995, respectively, were on deposit with
governmental authorities as required by law.
 
4.  SECURITIES LENDING:
The Company has a securities lending program operated on its behalf by the
Company's primary custodian, Chemical Bank of New York. The custodian has
indemnified the Company against losses arising from this program. The total par
value of securities out on loan was $51,537,000 and $250,729,000 and the income
resulting from this program was $137,000, $2,000 and $26,000 at December 31,
1996, 1995 and 1994, respectively.
 
5.  MORTGAGE LOANS:
The Company invests in commercial first mortgage loans throughout the United
States. The Company monitors the condition of the mortgage loans in its
portfolio. In those cases where mortgages have been restructured, appropriate
provisions have been made. In those cases where, in management's judgement, the
mortgage loans' values are impaired, appropriate losses are recorded.
 
The following table shows the geographical distribution of the mortgage
portfolio.
 
<TABLE>
<CAPTION>
                                                                                               DECEMBER 31,
                                                                                         ------------------------
                                                                                            1996         1995
                                                                                         ----------  ------------
                                                                                                (IN 000'S)
<S>                                                                                      <C>         <C>
California                                                                               $  154,272  $    153,811
Massachusetts                                                                                79,929        83,999
Michigan                                                                                     57,119        69,125
New York                                                                                     67,742        81,480
Ohio                                                                                         75,405        83,915
Pennsylvania                                                                                115,584       141,468
Washington                                                                                   75,819        91,900
All other                                                                                   313,062       361,213
                                                                                         ----------  ------------
                                                                                         $  938,932  $  1,066,911
                                                                                         ----------  ------------
                                                                                         ----------  ------------
</TABLE>
 
The Company has restructured mortgage loans totalling $29,261,000, and
$49,846,000 at December 31, 1996 and 1995, respectively, against which there are
provisions of $5,893,000 and $8,799,000 at December 31, 1996 and 1995,
respectively.
 
The Company has made commitments of mortgage loans on real estate into the
future. The outstanding commitments for these mortgages amount to $9,800,000 and
$13,100,000 at December 31, 1996 and 1995, respectively.
 
                                       70
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life Assurance Company of Canada)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1996, 1995 AND 1994
 
6.  INVESTMENTS GAINS AND LOSSES:
 
<TABLE>
<CAPTION>
                                                                                      YEARS ENDED DECEMBER 31,
                                                                                   -------------------------------
                                                                                     1996       1995       1994
                                                                                   ---------  ---------  ---------
                                                                                             (IN 000'S)
<S>                                                                                <C>        <C>        <C>
Net realized gains (losses)
Bonds                                                                              $   5,631  $   3,935  $    (858)
Mortgage loans                                                                           763        292     (5,689)
Real estate                                                                              599        391       (334)
Other assets                                                                             567     (2,549)       (97)
                                                                                   ---------  ---------  ---------
                                                                                   $   7,560  $   2,069  $  (6,978)
                                                                                   ---------  ---------  ---------
                                                                                   ---------  ---------  ---------
Changes in unrealized gains (losses):
Common stock of affiliates                                                         $  (5,739) $       0  $       0
Mortgage loans                                                                          (600)    (1,574)         0
Real estate                                                                            4,624      3,583       (671)
                                                                                   ---------  ---------  ---------
                                                                                   $  (1,715) $   2,009  $    (671)
                                                                                   ---------  ---------  ---------
                                                                                   ---------  ---------  ---------
</TABLE>
 
Realized capital gains and losses on bonds and mortgages which relate to changes
in levels of interest rates are charged or credited to an interest maintenance
reserve (IMR) and amortized into income over the remaining contractual life of
the security sold. The gross realized capital gains and losses credited or
charged to the interest maintenance reserve were a credit of $7,710,000 in 1996,
a credit of $12,714,000 in 1995, and a charge of $14,070,000 in 1994. All gains
and losses are transferred net of applicable taxes.
 
7.  NET INVESTMENT INCOME:
Net investment income consisted of:
 
<TABLE>
<CAPTION>
                                                                                   YEARS ENDED DECEMBER 31,
                                                                              ----------------------------------
                                                                                 1996        1995        1994
                                                                              ----------  ----------  ----------
                                                                                          (IN 000'S)
<S>                                                                           <C>         <C>         <C>
Interest income from bonds                                                    $  178,695  $  205,445  $  200,338
Income from investment in common stock of affiliates                              50,408      35,403      39,577
Interest income from mortgage loans                                               92,591      99,766     106,404
Real estate investment income                                                     16,249      14,979      12,950
Interest income from policy loans                                                  2,790       2,777       2,669
Other                                                                              1,710       2,672       1,212
                                                                              ----------  ----------  ----------
    Gross investment income                                                      342,443     361,042     363,150
Interest on surplus notes                                                        (23,061)    (31,813)    (31,150)
Investment expenses                                                              (15,629)    (16,357)    (16,567)
                                                                              ----------  ----------  ----------
                                                                              $  303,753  $  312,872  $  315,433
                                                                              ----------  ----------  ----------
                                                                              ----------  ----------  ----------
</TABLE>
 
                                       71
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life Assurance Company of Canada)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1996, 1995 AND 1994
 
8.  DERIVATIVES:
The Company uses derivative instruments for interest risk management purposes,
including hedges against specific interest rate risk and to minimize the
Company's exposure to fluctuations in interest rates. The Company's use of
derivatives has included U.S. Treasury futures, conventional interest rate
swaps, and forward spread lock interest rate swaps.
 
In the case of interest rate futures, gains or losses on contracts that qualify
as hedges are deferred until the earliest of the completion of the hedging
transaction, determination that the transaction will no longer take place, or
determination that the hedge is no longer effective. Upon completion of the
hedge, where it is impractical to allocates gains (losses) to specific hedged
assets or liabilities, gains ( losses) are deferred in IMR and amortized over
the remaining life of the hedged assets. At December 31, 1996 and December 31,
1995 there were no futures contracts outstanding.
 
In the case of interest rate and foreign currency swap agreements and forward
spread lock interest rate swap agreements, gains or losses on terminated swaps
are deferred in IMR and amortized over the shorter of the remaining life of the
hedged asset or the remaining term of the swap contract. The net differential to
be paid or received on interest rate swaps is recorded monthly as interest rates
change.
 
<TABLE>
<CAPTION>
                                                                                         SWAPS OUTSTANDING
                                                                                       AT DECEMBER 31, 1996
                                                                                 ---------------------------------
                                                                                      NOTIONAL       MARKET VALUE
                                                                                 PRINCIPAL AMOUNTS   OF POSITIONS
                                                                                 ------------------  -------------
                                                                                            (IN 000'S)
<S>                                                                              <C>                 <C>
Conventional interest rate swaps                                                    $    429,000       $  (2,443)
Foreign currency swap                                                                      2,100              70
Forward spread lock swaps                                                                 50,000             (50)
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                         SWAPS OUTSTANDING
                                                                                       AT DECEMBER 31, 1995
                                                                                 ---------------------------------
                                                                                      NOTIONAL       MARKET VALUE
                                                                                 PRINCIPAL AMOUNTS   OF POSITIONS
                                                                                 ------------------  -------------
                                                                                            (IN 000'S)
<S>                                                                              <C>                 <C>
Conventional interest rate swaps                                                    $    367,000       $   3,275
Foreign currency swap                                                                      2,745             290
Forward spread lock swaps                                                                 50,000             112
</TABLE>
 
The market value is the estimated amount that the Company would receive or pay
on termination or sale, taking into account current interest rates and the
current creditworthiness of the counterparties. The Company is exposed to
potential credit loss in the event of non-performance by counterparties. The
counterparties are major financial institutions and management believes that the
risk of incurring losses related to credit risk is remote.
 
9.  LEVERAGED LEASES:
The Company is a lessor in a leveraged lease agreement entered into on October
21, 1994, under which equipment having an estimated economic life of 25-40 years
was leased for a term of 9.75 years. The Company's equity investment represented
22.9% of the purchase price of the equipment. The balance of the purchase price
was furnished by third-party long-term debt financing, collateralized by the
equipment and non-recourse to the Company. At the end of the lease term, the
Master Lessee may exercise a fixed price purchase option to purchase the
equipment.
 
                                       72
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life Assurance Company of Canada)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1996, 1995 AND 1994
 
9.  LEVERAGED LEASES (CONTINUED):
The Company's net investment in leveraged leases is composed of the following
elements:
 
<TABLE>
<CAPTION>
                                                                                         YEARS ENDED DECEMBER
                                                                                                 31,
                                                                                        ----------------------
                                                                                           1996        1995
                                                                                        ----------  ----------
                                                                                              (IN 000'S)
<S>                                                                                     <C>         <C>
Lease contracts receivable                                                              $  101,244  $  111,611
Less non-recourse debt                                                                     101,227    (111,594)
                                                                                        ----------  ----------
                                                                                                17          17
Estimated residual value of leased assets                                                   41,150      41,150
Less unearned and deferred income                                                          (11,501)    (13,132)
                                                                                        ----------  ----------
Investment in leveraged leases                                                              29,666      28,035
Less fees                                                                                     (188)       (213)
                                                                                        ----------  ----------
Net investment in leveraged leases                                                      $   29,478  $   27,822
                                                                                        ----------  ----------
                                                                                        ----------  ----------
</TABLE>
 
The net investment is classified as other invested assets in the accompanying
statements of admitted assets, liabilities, capital stock and surplus.
 
10. REINSURANCE:
The Company has agreements with the parent company which provide that the parent
company will reinsure the mortality risks of the individual life insurance
contracts sold by the Company. Under these agreements basic death benefits and
supplementary benefits are reinsured on a yearly renewable term basis and
coinsurance basis, respectively. Reinsurance transactions under these agreements
had the effect of decreasing income from operations by approximately $1,603,000,
$2,184,000, and $2,138,000 for the years ended December 31, 1996, 1995 and 1994,
respectively.
 
Effective January 1, 1991, the Company entered into an agreement with the parent
company under which certain individual life insurance contracts issued by the
parent company were reinsured by the Company on a 90% coinsurance basis. Also,
effective January 1, 1991, the Company entered into an agreement with the parent
company which provides that the parent company will reinsure the mortality risks
in excess of $500,000 per policy for the individual life insurance contracts
assumed by the Company in the reinsurance agreement described above. Such death
benefits are reinsured on a yearly renewable term basis. These agreements had
the effect of increasing income from operations by approximately $35,161,000 and
$11,821,000 for the years ended December 31, 1996 and 1995, respectively, and
decreasing income by approximately $29,188,000 for the year ended December 31,
1994. The life reinsurance assumed agreement requires the reinsurer to withhold
funds in amounts equal to the reserves assumed.
 
                                       73
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life Assurance Company of Canada)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1996, 1995 AND 1994
 
10. REINSURANCE (CONTINUED):
The following are summarized pro-forma results of operations of the Company for
the years ended December 31, 1996, 1995 and 1994 before the effect of
reinsurance transactions with the parent company.
 
<TABLE>
<CAPTION>
                                                                           PRO-FORMA RESULTS PRE-REINSURANCE
                                                                                YEARS ENDED DECEMBER 31,
                                                                        ----------------------------------------
                                                                            1996          1995          1994
                                                                        ------------  ------------  ------------
                                                                                       (IN 000'S)
<S>                                                                     <C>           <C>           <C>
Income:
    Premiums, annuity deposits and other revenues                       $  1,858,145  $  1,619,337  $  2,053,408
    Net investment income and realized gains                                 312,870       315,967       312,582
                                                                        ------------  ------------  ------------
    Subtotal                                                               2,171,015     1,935,304     2,365,990
                                                                        ------------  ------------  ------------
Benefits and Expenses:
    Policyholder benefits                                                  1,928,720     1,760,917     2,183,282
    Other expenses                                                           155,531       130,302       130,456
                                                                        ------------  ------------  ------------
    Subtotal                                                               2,084,251     1,891,219     2,313,738
                                                                        ------------  ------------  ------------
Income from operations                                                  $     86,764  $     44,085  $     52,252
                                                                        ------------  ------------  ------------
                                                                        ------------  ------------  ------------
</TABLE>
 
The Company has an agreement with an unrelated company which provides
reinsurance of certain individual life insurance contracts on a modified
coinsurance basis and under which all deficiency reserves related to these
contracts are reinsured. Reinsurance transactions under this agreement had the
effect of decreasing income from operations by $46,000 in 1996, and by
$1,599,000 in 1995, and increasing income from operations by $1,854,404 in 1994.
 
                                       74
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life Assurance Company of Canada)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1996, 1995 AND 1994
 
11. WITHDRAWAL CHARACTERISTICS OF ANNUITY ACTUARIAL RESERVES AND DEPOSIT
LIABILITIES:
Withdrawal characteristics of general account and separate account annuity
reserves and deposits:
 
<TABLE>
<CAPTION>
                                                        DECEMBER 31, 1996
                                                    -------------------------
                                                       AMOUNT      % OF TOTAL
                                                    ------------   ----------
                                                           (IN 000'S)
<S>                                                 <C>            <C>
Subject to discretionary withdrawal-with
  adjustment
    --with market value adjustment                  $  3,547,683      30.44%
    --at book value less surrender charges
     (surrender charge >5%)                            5,626,117      48.27
    --at book value (minimal or no charge or
     adjustment)                                       1,264,586      10.85
Not subject to discretionary withdrawal provision      1,218,157      10.44
                                                    ------------   ----------
Total annuity actuarial reserves and deposit
  liabilities                                       $ 11,656,543     100.00%
                                                    ------------   ----------
                                                    ------------   ----------
</TABLE>
 
<TABLE>
<CAPTION>
                                                       DECEMBER 31, 1995
                                                    -----------------------
                                                      AMOUNT     % OF TOTAL
                                                    -----------  ----------
                                                          (IN 000'S)
<S>                                                 <C>          <C>
Subject to discretionary withdrawal-with
  adjustment
    --with market value adjustment                  $ 3,796,596     36.36%
    --at book value less surrender charges
     (surrender charge >5%)                           4,066,126     38.94
    --at book value (minimal or no charge or
     adjustment)                                      1,278,215     12.24
Not subject to discretionary withdrawal provision     1,301,259     12.46
                                                    -----------  ----------
Total annuity actuarial reserves and deposit
  liabilities                                       $10,442,196    100.00%
                                                    -----------  ----------
                                                    -----------  ----------
</TABLE>
 
12. RETIREMENT PLANS:
The Company participates with its parent company in a non-contributory defined
benefit pension plan covering essentially all employees. The benefits are based
on years of service and compensation.
 
The funding policy for the pension plan is to contribute an amount which at
least satisfies the minimum amount required by ERISA. The Company is charged for
its share of the pension cost based upon its covered participants. Pension plan
assets consist principally of separate accounts of the parent company.
 
The Company's share of the group's accrued pension cost at December 31, 1996,
1995 and 1994 was $446,000, $420,000, and $417,000, respectively. The Company's
share of net periodic pension cost was $27,000, $3,000, and $417,000, for 1996,
1995 and 1994, respectively.
 
The Company also participates with its parent and certain affiliates in a 401(k)
savings plan for which substantially all employees are eligible. The Company
matches, up to specified amounts, employees' contributions to the plan. Company
contributions were $233,000, $185,000 and $152,000 for the years ended December
31, 1996, 1995, and 1994, respectively.
 
OTHER POST-RETIREMENT BENEFIT PLANS:
 
In addition to pension benefits the Company provides certain health, dental, and
life insurance benefits ("post-retirement benefits") for retired employees and
dependents. Substantially all employees may become eligible for these benefits
if they reach normal retirement age while working for the Company, or retire
early upon satisfying an alternate age plus service condition. Life insurance
benefits are generally set at a fixed amount.
 
                                       75
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life Assurance Company of Canada)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1996, 1995 AND 1994
 
12. RETIREMENT PLANS (CONTINUED):
Effective January 1, 1994, the Company adopted Statement of Financial Accounting
Standards ("SFAS") No. 106, "Employer's Accounting for Post-retirement Benefits
Other than Pensions.' SFAS No. 106 requires the Company to accrue the estimated
cost of retiree benefit payments during the years the employee provides
services. SFAS No. 106 allows recognition of the cumulative effect of the
liability in the year of adoption or the amortization of the obligation over a
period of up to 20 years. The Company has elected to recognize this obligation
of approximately $400,000 over a period of ten years. The Company's cash flows
are not affected by implementation of this standard, but implementation
decreased net income by $209,000, $142,000, and $114,000 for the years ended
December 31, 1996, 1995 and 1994, respectively. Effective June 5, 1996, the
Company made certain changes regarding eligibility and benefits to its post-
retirement health benefits plans for retirees on or after that date. The impact
of these changes is a decrease of 1996 post-retirement benefit costs of
$599,000. The Company's post-retirement health care plans currently are not
funded.
 
13. FAIR VALUE OF FINANCIAL INSTRUMENTS:
The following table presents the carrying amounts and estimated fair values of
the Company's financial instruments at December 31, 1996 and 1995:
<TABLE>
<CAPTION>
                                                                  DECEMBER 31, 1996
                                                       ---------------------------------------
                                                        CARRYING AMOUNT   ESTIMATED FAIR VALUE
                                                       -----------------  --------------------
                                                                     (IN 000'S)
<S>                                                    <C>                <C>
ASSETS
Bonds                                                    $   2,258,858       $    2,339,126
Mortgages                                                      938,932              958,909
LIABILITIES
Insurance reserves                                             122,606              122,606
Individual annuities                                           373,488              367,878
Pension products                                             1,911,284            1,922,602
Derivatives                                                         --               (2,423)
 
<CAPTION>
                                                                  DECEMBER 31, 1995
                                                       ---------------------------------------
                                                        CARRYING AMOUNT   ESTIMATED FAIR VALUE
                                                       -----------------  --------------------
                                                                     (IN 000'S)
<S>                                                    <C>                <C>
ASSETS
Bonds                                                    $   2,706,067       $    2,872,586
Mortgages                                                    1,066,911            1,111,895
LIABILITIES
Insurance reserves                                             124,066              124,066
Individual annuities                                           434,261              431,263
Pension products                                             2,227,882            2,265,386
Derivatives                                                         --                3,387
</TABLE>
 
                                       76
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life Assurance Company of Canada)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1996, 1995 AND 1994
 
13. FAIR VALUE OF FINANCIAL INSTRUMENTS (CONTINUED):
The major methods and assumptions used in estimating the fair values of
financial instruments are as follows:
 
The fair values of short-term bonds are estimated to be the amortized cost. The
fair values of long-term bonds which are publicly traded are based upon market
prices or dealer quotes. For privately placed bonds, fair values are estimated
taking into account prices for publicly traded bonds of similar credit risk and
maturity and repayment and liquidity characteristics.
 
The fair values of the Company's general account reserves and liabilities under
investment-type contracts (insurance, annuity and pension contracts that do not
involve mortality or morbidity risks) are estimated using discounted cash flow
analyses or surrender values. Those contracts that are deemed to have short-term
guarantees have a carrying amount equal to the estimated market value.
 
The fair values of mortgages are estimated by discounting future cash flows
using current rates at which similar loans would be made to borrowers with
similar credit ratings and for the same remaining maturities.
 
The fair values of derivative financial instruments are estimated using the
process described in Note #8.
 
14. STATUTORY INVESTMENT VALUATION RESERVES:
The asset valuation reserve ("AVR") provides a reserve for losses from
investments in bonds, stocks, mortgage loans, real estate and other invested
assets with related increases or decreases being recorded directly to surplus.
 
Realized capital gains and losses on bonds and mortgages which relate to changes
in levels of interest rates are charged or credited to an interest maintenance
reserve ("IMR") and amortized into income over the remaining contractual life of
the security sold.
 
The tables shown below present changes in the major elements of the AVR and IMR.
 
<TABLE>
<CAPTION>
                                                                              1996                  1995
                                                                      --------------------  --------------------
                                                                         AVR        IMR        AVR        IMR
                                                                      ---------  ---------  ---------  ---------
                                                                           (IN 000'S)            (IN 000'S)
<S>                                                                   <C>        <C>        <C>        <C>
Balance, beginning of year                                            $  42,099  $  25,218  $  28,409  $  18,140
Realized investment gains (losses), net of tax                            3,160      5,011     (1,524)     7,977
Amortization of investment (gains) losses                                     0     (1,557)         0       (899)
Unrealized investment gains (losses)                                      1,502          0      3,650          0
Required by formula                                                       7,150          4     11,564          0
                                                                      ---------  ---------  ---------  ---------
Balance, end of year                                                  $  53,911  $  28,676  $  42,099  $  25,218
                                                                      ---------  ---------  ---------  ---------
                                                                      ---------  ---------  ---------  ---------
</TABLE>
 
15. FEDERAL INCOME TAXES:
The Company and its subsidiaries file a consolidated federal income tax return.
Federal income taxes are calculated for the consolidated group based upon
amounts determined to be payable as a result of operations within the current
year. No provision is recognized for timing differences which may exist between
financial statement and taxable income. Such timing differences include
reserves, depreciation and accrual of market discount on bonds. Cash payments
for federal income taxes were approximately $19,264,000, $12,429,000 and
$43,200,000 for the years ended December 31, 1996, 1995 and 1994, respectively.
 
                                       77
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life Assurance Company of Canada)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1996, 1995 AND 1994
 
16. SURPLUS NOTES AND NOTE RECEIVABLE:
The Company had issued and outstanding surplus notes to its parent with an
aggregate carrying value of $335,000,000 during the period 1982 through January
16, 1996 at interest rates between 7.25% and 10%. The Company repaid all
principal and interest associated with these surplus notes on January 16, 1996.
 
On December 19, 1995 the Company issued surplus notes totalling $315,000,000 to
an affiliate, Sun Canada Financial Co., at interest rates between 5.75% and
7.25%. Of these notes, $157,500,000 will mature in the year 2007, and
$157,500,000 will mature in the year 2015. Interest on these notes is payable
semi-annually.
 
Principal and interest on surplus notes are payable only to the extent that the
Company meets specified requirements regarding free surplus exclusive of the
principal amount and accrued interest, if any, on these notes; and, in the case
of principal repayments, with the consent of the Delaware Insurance
Commissioner. In addition, with regard to surplus notes outstanding through
January 16, 1996, subsequent to December 31, 1994 interest payments required the
consent of the Delaware Insurance Commissioner. Payment of principal and
interest on the notes issued in 1995 also requires the consents of the Delaware
Insurance Commissioner and Canadian Office of the Superintendent of Financial
Institutions.
 
During 1996, 1995 and 1994, the Company obtained the required consents, and
expensed $23,061,000, $31,813,000 and $31,150,000 in respect of interest on
surplus notes for the years 1996, 1995 and 1994, respectively.
 
On December 19, 1995, the parent borrowed $120,000,000 at 5.6% through a
short-term note from the Company maturing on January 16, 1996. The note, which
is included in due from parent and affiliates at December 31, 1995, was repaid
in full by the parent at maturity.
 
17. MANAGEMENT AND SERVICE CONTRACTS:
The Company has an agreement with its parent company which provides that the
parent company will furnish, as requested, personnel as well as certain services
and facilities on a cost-reimbursement basis. Expenses under this agreement
amounted to approximately $20,192,000 in 1996, $20,293,000 in 1995, and
$18,452,000 in 1994.
 
18. RISK-BASED CAPITAL:
Effective December 31, 1993 the NAIC adopted risk-based capital requirements for
life insurance companies. The risk-based capital requirements provide a method
for measuring the minimum acceptable amount of adjusted capital that a life
insurer should have, as determined under statutory accounting practices, taking
into account the risk characteristics of its investments and products. The
Company has met the minimum risk-based capital requirements at December 31, 1996
and 1995.
 
19. ACCOUNTING POLICIES AND PRINCIPLES:
The financial statements of the Company have been prepared on the basis of
statutory accounting practices, which prior to 1996, were considered by the
insurance industry and the accounting profession to be in accordance with GAAP
for mutual life insurance companies. The primary differences between statutory
accounting practices and GAAP are described as follows. Under statutory
accounting practices, financial statements are not consolidated and investments
in subsidiaries are shown at net equity value. Accordingly, the assets,
liabilities and results of operations of the Company's subsidiaries are not
consolidated with the assets, liabilities and results of operations,
respectively, of the Company. Changes in net equity value of the common stock of
the Company's United States life insurance subsidiaries are directly reflected
in the
 
                                       78
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life Assurance Company of Canada)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1996, 1995 AND 1994
 
19. ACCOUNTING POLICIES AND PRINCIPLES (CONTINUED):
Company's surplus. Changes in the net equity value of the common stock of all
other subsidiaries are directly reflected in the Company's Investment Valuation
Reserves. Dividends paid by subsidiaries to the Company are included in the
Company's net investment income.
 
Other differences between statutory accounting practices and GAAP include the
following: Statutory accounting practices do not recognize the following assets
or liabilities which are reflected under GAAP-- deferred policy acquisition
costs, deferred federal income taxes and statutory non-admitted assets. Asset
Valuation Reserves and Interest Maintenance Reserves are established under
statutory accounting practices but not under GAAP. Methods for calculating real
estate depreciation and investment valuation allowances differ under statutory
accounting practices than under GAAP. Actuarial assumptions and reserving
methods differ under statutory accounting practices and GAAP. Premiums for
universal life and investment type products are recognized as income for
statutory purposes and as deposits to policyholders' accounts for GAAP.
 
Because the Company's management uses financial information prepared in
conformity with accounting principles generally accepted in Canada in the normal
course of business, the management of the Company has determined that the cost
of complying with Statement No. 120 would exceed the benefits that the Company,
or the users of its financial statements would experience. Consequently, the
Company has elected not to apply such standards in the preparation of these
financial statements.
 
                                       79
<PAGE>
INDEPENDENT AUDITORS' REPORT
 
TO THE BOARD OF DIRECTORS
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
 
We have audited the accompanying statutory statements of admitted assets,
liabilities, and capital stock and surplus of Sun Life Assurance Company of
Canada (U.S.) as of December 31, 1996 and 1995, and the related statutory
statements of operations, changes in capital stock and surplus, and cash flow
for each of the three years in the period ended December 31, 1996. These
financial statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these financial statements based on
our audits.
 
We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audits to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and signficant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
As described more fully in Notes 1 and 19 to the financial statements, the
Company prepared these financial statements using accounting practices
prescribed or permitted by the Insurance Department of the State of Delaware,
which practices differ from generally accepted accounting principles. The
effects on the financial statements of the variances between the statutory basis
of accounting and generally accepted accounting principles, although not
reasonably determinable, are presumed to be material.
 
In our opinion, the financial statements referred to above present fairly, in
all material respects, the admitted assets, liabilities, and capital stock and
surplus of Sun Life Assurance Company of Canada (U.S.) as of Dcember 31, 1996
and 1995, and the results of its operations and its cash flow for each of the
three years in the period ended December 31, 1996 on the basis of accountng
described in Notes 1 and 19.
 
However, because of the effects of the matter discussed in the second preceding
paragraph, in our opinion, the financial statements referred to above do not
present fairly, in conformity with generally accepted accounting principles, the
financial position of Sun Life Assurance Company of Canada (U.S.) as of December
31, 1996 and 1995 or the results of its operations or its cash flow for each of
the three years in the period ended Decemeber 31, 1996.
 
In our previous report dated February 7, 1996, we expressed an opinion that the
1995 and 1994 financial statements, prepared using accounting practices
prescribed or permitted by the Insurance Department of the State of Delaware,
presented fairly, in all material respects, the financial position of Sun Life
Assurance Company of Canada (U.S.) as of December 31, 1995, and the results of
its operations, and its cash flow for the years ended December 31, 1995 and 1994
in conformity with generally accepted accounting principles. As described in
Notes 1 and 19 to the financial statements, pursuant to the provisions of
Statement of Financial Accounting Standards No. 120, ACCOUNTING AND REPORTING BY
MUTUAL LIFE INSURANCE ENTERPRISES AND BY INSURANCE ENTERPRISES FOR CERTAIN
LONG-DURATION PARTICIPATING CONTRACTS, financial statements of mutual life
insurance enterprises (and stock life insurance companies that are wholly owned
subsidiaries of mutual life insurance companies) for periods ending on or before
December 15, 1996, prepared using accounting practices prescribed or permitted
by insurance regulators, are not considered presentations in conformity with
generally accepted accounting principles when presented for comparative purposes
with the enterprise's financial statements for periods subsequent to the
effective date of Statement No. 120. Accordingly, our present opinion on the
presentation of the 1995 and 1994 financial statements in accordance with
generally accepted accounting principles, as presented herein, is different from
that expressed in our previous report.
 
As management as stated in Note 19, because the Company's management uses
financial information prepared in accordance with accounting principles
generally accepted in Canada in the normal course of business, the management of
Sun Life Assurance Company of Canada (U.S.) has determined that the cost of
complying with Statement No. 120 would exceed the benefits that the Company, or
the users of its financial statements, would experience. Consequently, the
Company has elected not to apply such standards in the preparation of these
financial statements.
 
DELOITTE & TOUCHE LLP
 
February 3, 1997
 
                                       80
<PAGE>
                                   APPENDIX A
 
ILLUSTRATIVE EXAMPLE OF VARIABLE ACCUMULATION UNIT VALUE CALCULATIONS:
 
    Suppose the net asset value of a Series Fund share at the end of the current
valuation  period is $18.38;  at the end of  the immediately preceding valuation
period was  $18.32;  the  Valuation Period  is  one  day; and  no  dividends  or
distributions  caused Series Fund shares to  go "ex-dividend" during the current
Valuation Period. $18.38 divided  by $18.32 is  1.00327511. Subtracting the  one
day  risk factor  for mortality and  expense risks and  the distribution expense
charge of .00003809 (the daily equivalent of the current maximum charge of 1.40%
on an annual basis) gives a net investment factor of 1.00323702. If the value of
the variable accumulation  unit for the  immediately preceding valuation  period
had  been  14.5645672,  the value  for  the  current valuation  period  would be
14.6117130 (14.5645672 X 1.00323702).
 
ILLUSTRATIVE EXAMPLE OF VARIABLE ANNUITY UNIT VALUE CALCULATIONS:
 
    Suppose the circumstances of  the first example exist,  and the value of  an
annuity unit for the immediately preceding valuation period had been 12.3456789.
If  the first variable annuity payment is determined by using an annuity payment
based on an assumed interest rate of 4% per year, the value of the annuity  unit
for  the current valuation  period would be  12.3843113 (12.3456789 X 1.00323702
(the Net Investment Factor) X 0.99989255).  0.99989255 is the factor, for a  one
day Valuation Period, that neutralizes the assumed interest rate of four percent
(4%) per year used to establish the Annuity Payment Rates found in the Contract.
 
ILLUSTRATIVE EXAMPLE OF VARIABLE ANNUITY PAYMENT CALCULATIONS:
 
    Suppose  that a Participant's  Account is credited  with 8,765.4321 variable
accumulation units of  a particular  Sub-Account but  is not  credited with  any
fixed  accumulation units;  that the  variable accumulation  unit value  and the
annuity unit value for the particular Sub-Account for the valuation period which
ends immediately  preceding the  annuity commencement  date are  14.5645672  and
12.3456789  respectively; that the  annuity payment rate for  the age and option
elected is $6.78 per $1,000; and that the annuity unit value on the day prior to
the second  variable annuity  payment  date is  12.3843113. The  first  variable
annuity  payment would  be $865.57  (8,765.4321 X  14.5645672 X  6.78 divided by
1,000). The number of annuity units  credited would be 70.1112 ($865.57  divided
by 12.3456789) and the second variable annuity payment would be $868.28 (70.1112
X 12.3843113).
 
                                   APPENDIX B
                              STATE PREMIUM TAXES
 
   
    The  amount of  applicable tax varies  depending on the  jurisdiction and is
subject to change by the legislature  or other authority. In many  jurisdictions
there  is no tax at all. The Company  believes that as of April 30, 1997 premium
taxes will be imposed with respect to Contracts offered by this Prospectus  only
by  the  jurisdictions  listed below  at  the rates  indicated.  For information
subsequent to April 30, 1997 a tax adviser should be consulted.
    
 
   
<TABLE>
<CAPTION>
                                         RATE OF TAX
                                -----------------------------
                                QUALIFIED      NON-QUALIFIED
STATE                           CONTRACTS        CONTRACTS
- ------------------------------  ----------     --------------
<S>                             <C>            <C>
California                           .50%               2.35%
District of Columbia                2.25%               2.25%
Kansas                              --                  2.00%
Kentucky                            2.00%               2.00%
Maine                               --                  2.00%
Nevada                              --                  3.50%
South Dakota                        --                  1.25%
West Virginia                       1.00%               1.00%
Wyoming                             --                  1.00%
</TABLE>
    
 
                                       81
<PAGE>
                                   APPENDIX C
        WITHDRAWALS, WITHDRAWAL CHARGES AND THE MARKET VALUE ADJUSTMENT
 
PART 1: VARIABLE  ACCOUNT (THE  MARKET VALUE ADJUSTMENT  DOES NOT  APPLY TO  THE
VARIABLE ACCOUNT)
 
    These examples assume the following:
 
        1)  The Purchase Payment was $10,000
 
        2)   The date of full surrender  or partial withdrawal occurs during the
    3rd Account Year and
 
           a)  the Participant's Account Value is $12,000 and is attributable to
       the value of Variable Accumulation Units of one Sub-Account,
 
           b)  no previous partial withdrawals have been made.
 
EXAMPLE A--FULL SURRENDER:
 
        1)  10% or .10 of  the Purchase Payment is available without  imposition
    of a withdrawal charge: (.10 X $10,000 = $1,000).
 
        2)   The balance of  the full surrender ($12,000  - $1,000 = $11,000) is
    subject to the withdrawal charge applicable during the 3rd Account Year  (5%
    or .05).
 
        3)  The amount of the withdrawal charge is .05 X $11,000 = $550.
 
        4)  The amount of the full surrender is $12,000 - $550 = $11,450.
 
EXAMPLE B--PARTIAL WITHDRAWAL (IN THE AMOUNT OF $2,000):
 
        1)   10% or .10 of the  Purchase Payment is available without imposition
    of a withdrawal charge: (.10 X $10,000 = $1,000).
 
        2)  The balance of the partial withdrawal ($2,000 - $1,000 = $1,000)  is
    subject  to the withdrawal charge applicable during the 3rd Account Year (5%
    or .05).
 
        3)  The amount of the withdrawal charge is equal to the amount  required
    to complete the partial withdrawal ($2,000 - $1,000 = $1,000) divided by 1 -
    .05  or .95 less the amount required  to complete the balance of the partial
    withdrawal.
 
        Withdrawal Charge = $1,000 - $1,000
                          ---------
                           .95
 
                        = $52.63
 
    In this  example,  in  order  for the  Participant  to  receive  the  amount
requested ($2,000), a gross withdrawal of $2052.63 must be processed with $52.63
representing the withdrawal charge calculated above.
 
PART 2--FIXED ACCOUNT--EXAMPLES OF THE MARKET VALUE ADJUSTMENT (MVA)
 
    The MVA factor is:
 
                        N/12
  (  1 + I
     -------------
     1 + J + .005  )        -1
 
    These examples assume the following:
 
        1)   the Guarantee Amount was allocated  to a four year Guarantee Period
    with a Guaranteed Interest Rate of 5% or .05 (l).
 
        2)  the date  of surrender is  two years from the  Expiration Date (N  =
    24).
 
        3)    the value  of the  Guarantee Amount  on the  date of  surrender is
    $11,025 and,
 
        4)  no transfers or partial withdrawals affecting this Guarantee  Amount
    have been made
 
        5)   withdrawal charges,  if any, are  calculated in the  same manner as
    shown in the examples in Part 1.
 
                                       82
<PAGE>
EXAMPLE OF A NEGATIVE MVA:
 
    Assume that on the date of surrender, the current rate (J) is 7% or .07.
 
                                             N/12
 The MVA factor =    (  1 + l
                        --------------
                        1 + J + .005   )             -1
                                             24/12
                =    (  1 + .05
                        --------------
                        1 + .07 + .005 )             -1
 
                =    (.977)(2) -1
 
                =    .954 -1
 
                = -  .046
 
    The value  of  the Guarantee  Amount  is multiplied  by  the MVA  factor  to
determine the MVA
 
                          $11,025 X (-.046) = -$507.15
 
         -$507.15 represents the MVA that will be deducted from the value of the
    Guarantee Amount before the application of any withdrawal charge.
 
EXAMPLE OF A POSITIVE MVA:
 
    Assume that on the date of surrender, the current rate (J) is 4% or .04.
 
                                             N/12
 The MVA factor =    (  1 + l
                        --------------
                        1 + J + .005   )             -1
                                             24/12
                =    (  1 + .05
                        --------------
                        1 + .04 + .005 )             -1
 
                =    (1.005)(2) -1
 
                =    1.010 -1
 
                =    .010
 
    The value  of  the Guarantee  Amount  is multiplied  by  the MVA  factor  to
determine the MVA
 
                            $11,025 X .010 = $110.25
 
          $110.25 represents  the MVA that  would be  added to the  value of the
    Guarantee Amount before the application of any withdrawal charge.
 
    If the above examples had been  for partial withdrawals, the MVA's would  be
reduced  proportionally. For example, if only 25%  of the value of the Guarantee
Amount were being  surrendered, the  MVA would be  -$126.79 and  $27.56 for  the
negative MVA and positive MVA, respectively.
 
                                       83
<PAGE>
                                   APPENDIX D
                        CALCULATION OF PERFORMANCE DATA
 
AVERAGE ANNUAL TOTAL RETURN:
 
    The table below shows, for various Sub-Accounts of the Variable Account, the
Average  Annual Total Return  for the stated periods,  based upon a hypothetical
initial Purchase Payment of  $1,000, calculated in  accordance with the  formula
set out below the table.
 
   
                          AVERAGE ANNUAL TOTAL RETURN
                        PERIOD ENDING DECEMBER 31, 1996
    
 
   
<TABLE>
<CAPTION>
                                     1 YEAR  5 YEAR
                                     PERIOD  PERIOD  LIFE*   DATE OF INCEPTION
                                     ------  ------  ------  -----------------
<S>                                  <C>     <C>     <C>     <C>
Capital Appreciation Series........  12.85%  13.36%  13.14%   November 2, 1989
Government Securities Series.......  (5.39%)  3.88%   6.21%   November 8, 1989
High Yield Series..................   4.45%   9.25%  10.06%   December 6, 1989
Managed Sectors Series.............   9.44%   8.55%  11.51%   November 2, 1989
Money Market Series................  (2.46%)  1.48%   3.07%   November 6, 1989
Total Return Series................   5.81%   8.84%   9.70%   November 2, 1989
World Governments Series...........  (2.51%)  4.29%   7.45%  November 24, 1989
</TABLE>
    
 
- ------------------------
 
*From Date of Inception of the Sub-Account investing in the Series.
 
 The  Average  Annual  Total Return  for  each  period in  the  table  above was
 determined by finding the  average annual compounded rate  of return over  each
 period  that would equate the initial  amount invested to the ending redeemable
 value for that period, in accordance with the following formula:
 
                                P(1 + T)(n) = ERV
 
Where: P  =   a hypothetical Purchase Payment of $1,000
       T  =   average annual total return for the period
       n  =   number of years
     ERV  =   redeemable value  (as  of  the  end  of  the  period)  of  a
              hypothetical  $1,000 Purchase Payment  made at the beginning
              of the period.
 
   The formula assumes that: 1) all  recurring fees have been deducted from  the
   Participant's  Account; 2) all applicable  non-recurring Contract charges are
   deducted at the end of the period; and  3) there will be a full surrender  at
   the end of the period.
 
    The  $30 annual Account Fee will be allocated among the Sub-Accounts so that
each Sub-Account's allocated portion of the  Account Fee is proportional to  the
percentage  of the  number of Certificates  that have amounts  allocated to that
Sub-Account. Because the impact of Account Fees on a particular Certificate  may
differ  from those assumed in the  computation due to differences between actual
allocations and  the  assumed  ones,  the total  return  that  would  have  been
experienced  by an actual Certificate over these same time periods may have been
different from that shown above.
 
NON-STANDARDIZED INVESTMENT PERFORMANCE:
 
    The Variable Account  may illustrate  its results over  various periods  and
compare  its results to indices and  other variable annuities in sales materials
including advertisements, brochures and reports. Such results may be computed on
a "cumulative" and/or "annualized" basis.
 
    "Cumulative" quotations  are arrived  at by  calculating the  change in  the
Accumulation  Unit value of a Sub-Account between  the first and last day of the
base period being measured, and expressing the difference as a percentage of the
Accumulation Unit value at the beginning of the base period.
 
    "Annualized" quotations  (described  in  the following  table  as  "Compound
Growth  Rate") are calculated  by applying a formula  which determines the level
rate of return which, if earned over  the entire base period, would produce  the
cumulative return.
 
                                       84
<PAGE>
                    NON-STANDARDIZED INVESTMENT PERFORMANCE:
 
   
$10,000 INVESTED IN                    ...WOULD HAVE GROWN TO THIS AMOUNT ON
THIS SUB-ACCOUNT UNDER A                          DECEMBER 31, 1996*
REGATTA CONTRACT
THIS MANY YEARS AGO...
    
 
   
<TABLE>
<CAPTION>
                              CAPITAL APPRECIATION SERIES       GOVERNMENT SECURITIES SERIES             HIGH YIELD SERIES
                           ---------------------------------  ---------------------------------  ---------------------------------
 NUMBER                               CUMULATIVE   COMPOUND              CUMULATIVE   COMPOUND              CUMULATIVE   COMPOUND
   OF                                   GROWTH      GROWTH                 GROWTH      GROWTH                 GROWTH      GROWTH
 YEARS        PERIODS        AMOUNT      RATE        RATE       AMOUNT      RATE        RATE       AMOUNT      RATE        RATE
- -------- ----------------- ---------- ----------  ----------  ---------- ----------  ----------  ---------- ----------  ----------
<S>      <C>               <C>        <C>         <C>         <C>        <C>         <C>         <C>        <C>         <C>
 1       12/31/95-12/31/96 $11,980.32    19.80%      19.80%   $10,020.66     0.21%       0.21%   $11,055.92    10.56%      10.56%
 2       12/31/94-12/31/96 $15,887.20    58.87%      26.04%   $11,626.38    16.26%       7.83%   $12,761.19    27.61%      12.97%
 3       12/31/93-12/31/96 $15,104.16    51.04%      14.74%   $11,218.55    12.19%       3.91%   $12,304.30    23.04%       7.16%
 4       12/31/92-12/31/96 $17,577.25    75.77%      15.14%   $12,027.41    20.27%       4.72%   $14,284.43    42.84%       9.32%
 5       12/31/91-12/31/96 $19,718.39    97.18%      14.54%   $12,669.58    26.70%       4.85%   $16,202.27    62.02%      10.13%
 Life     11/2/89-12/31/96 $24,706.45   147.06%      13.45%   $15,564.44    55.64%       6.38%   $19,754.50    97.55%      10.10%
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                MANAGED SECTORS SERIES               TOTAL RETURN SERIES             WORLD GOVERNMENTS SERIES
                           ---------------------------------  ---------------------------------  ---------------------------------
                                      CUMULATIVE   COMPOUND              CUMULATIVE   COMPOUND              CUMULATIVE   COMPOUND
                                        GROWTH      GROWTH                 GROWTH      GROWTH                 GROWTH      GROWTH
                             AMOUNT      RATE        RATE       AMOUNT      RATE        RATE       AMOUNT      RATE        RATE
                           ---------- ----------  ----------  ---------- ----------  ----------  ---------- ----------  ----------
<S>      <C>               <C>        <C>         <C>         <C>        <C>         <C>         <C>        <C>         <C>
 1       12/31/95-12/31/96 $11,596.20    15.96%      15.96%   $11,248.28    12.48%      12.48%   $10,321.21     3.21%       3.21%
 2       12/31/94-12/31/96 $15,125.84    51.26%      22.99%   $14,064.02    40.64%      18.59%   $11,776.08    17.76%       8.52%
 3       12/31/93-12/31/96 $14,630.21    46.30%      13.52%   $13,556.06    35.56%      10.67%   $11,092.43    10.92%       3.52%
 4       12/31/92-12/31/96 $15,013.94    50.14%      10.69%   $15,157.95    51.58%      10.96%   $13,004.15    30.04%       6.79%
 5       12/31/91-12/31/96 $15,767.57    57.68%       9.54%   $16,231.21    62.31%      10.17%   $12,884.08    28.84%       5.20%
 Life     11/2/89-12/31/96 $22,031.21   120.31%      11.65%   $20,040.46   100.40%      10.19%   $16,773.44    67.73%       7.55%
</TABLE>
    
 
- ------------------------
* For  purposes of determining  these investment results,  the actual investment
  performance of each Series of MFS/Sun Life Series Trust is reflected from  the
  date  of inception  of the  Sub-Account investing  in the  Series. The charges
  imposed under the  Contract against  the assets  of the  Variable Account  for
  mortality and expense risks and distribution expense risks have been deducted.
  However,  the annual Account  Fee is not  reflected and these  examples do not
  assume surrender at the end of the period.
   
**The life of each Series is as follows:
    
 
   
<TABLE>
             <S>                               <C>
             Capital Appreciation Series         11/2/89 - 12/31/96
             Government Securities Series        11/8/89 - 12/31/96
             High Yield Series                  12/26/89 - 12/31/96
             Managed Sectors Series              11/2/89 - 12/31/96
             Total Return Series                 11/2/89 - 12/31/96
             World Governments Series           11/24/89 - 12/31/96
</TABLE>
    
 
                                       85
<PAGE>
                        ADVERTISING AND SALES LITERATURE
    As set  forth in  the Prospectus,  the Company  may refer  to the  following
organizations (and others) in its marketing materials:
    A.M.  BEST'S  RATING  SYSTEM is  designed  to evaluate  the  various factors
affecting the overall performance of an insurance company in order to provide an
opinion as to an insurance company's relative financial strength and ability  to
meet its contractual obligations. The procedure includes both a quantitative and
qualitative review of each company.
    DUFF  &  PHELPS  CREDIT  RATING COMPANY's  Insurance  Company  Claims Paying
Ability Rating is an  independent evaluation by  a nationally accredited  rating
organization  of an insurance  company's ability to  meet its future obligations
under the contracts and  products it sells. The  rating takes into account  both
quantitative and qualitative factors.
    LIPPER  VARIABLE  INSURANCE  PRODUCTS  PERFORMANCE  ANALYSIS  SERVICE  is  a
publisher of statistical data  covering the investment  company industry in  the
United  States and overseas. Lipper is recognized  as the leading source of data
on open-end and  closed-end funds.  Lipper currently tracks  the performance  of
over  5,000  investment companies  and  publishes numerous  specialized reports,
including reports  on  performance  and  portfolio  analysis,  fee  and  expense
analysis.
    STANDARD & POOR's insurance claims-paying ability rating is an opinion of an
operating  insurance  company's financial  capacity to  meet obligations  of its
insurance policies in accordance with their terms.
    VARDS (Variable  Annuity Research  Data  Service) provides  a  comprehensive
guide to variable annuity contract features and historical fund performance. The
service  also  provides a  readily  understandable analysis  of  the comparative
characteristics and market performance of funds inclusive in variable contracts.
    STANDARD & POOR'S INDEX--broad-based measurement of changes in  stock-market
conditions  based on the  average performance of 500  widely held common stocks;
commonly known as the Standard & Poor's 500 (S&P 500). The selection of  stocks,
their  relative weightings to  reflect differences in  the number of outstanding
shares, and publication of  the index itself are  services of Standard &  Poor's
Corporation,  a financial advisory, securities  rating, and publishing firm. The
index tracks  400  industrial  company  stocks,  20  transportation  stocks,  40
financial company stocks, and 40 public utilities.
    NASDAQ-OTC  Price Index--this index is based  on the National Association of
Securities Dealers  Automated Quotations  (NASDAQ) and  represents all  domestic
over-the-counter  stocks except those traded on  exchanges and those having only
one market maker, a total of some 3,500 stocks. It is market value-weighted  and
was introduced with a base of 100.00 on February 5, 1971.
    DOW  JONES INDUSTRIAL AVERAGE (DJIA)--price-weighted  average of 30 actively
traded blue chip stocks, primarily  industrials, but including American  Express
Company  and American Telephone and Telegraph Company. Prepared and Published by
Dow Jones & Company, it is the oldest  and most widely quoted of all the  market
indicators. The average is quoted in points, not dollars.
    In  its advertisements and  other sales literature  for the Variable Account
and the Series  Fund, the Company  intends to illustrate  the advantages of  the
Contracts in a number of ways:
    COMPOUND INTEREST ILLUSTRATIONS.  These will emphasize several advantages of
the  variable annuity contract. For  example, but not by  way of limitation, the
literature may  emphasize  the  potential  savings  through  tax  deferral;  the
potential  advantage of  the Variable  Account over  the fixed  account; and the
compounding effect  when a  Participant makes  regular deposits  to his  or  her
Account.
    DOLLAR  COST AVERAGING  ILLUSTRATIONS.   These illustrations  will generally
discuss the  price-leveling effect  of making  regular investments  in the  same
Sub-Accounts  over a period of  time, to take advantage  of the trends in market
prices of the portfolio securities purchased by those Sub-Accounts.
    SYSTEMATIC WITHDRAWAL PROGRAM.  A  service provided by the Company,  through
which  a Participant may take any distribution allowed by Code Section 401(a)(9)
in the case of Qualified  Contracts, or permitted under  Code Section 72 in  the
case  of Non-Qualified  Contracts, by  way of  a series  of partial withdrawals.
Withdrawals under this program  may be fully or  partially includible in  income
and may be subject to a 10% penalty tax. Consult your tax adviser.
    THE COMPANY'S OR MFS'S CUSTOMERS.  Sales literature for the Variable Account
and  the Series Fund may refer to the  number of clients which they serve. As of
the date of this Prospectus, MFS was serving over 1.9 million investor accounts.
   
    THE COMPANY'S OR MFS'S  ASSETS, SIZE.  The  Company may discuss its  general
financial condition (see, for example, the references to Standard & Poor's, Duff
&  Phelps and A.M. Best Company above); it  may refer to its assets; it may also
discuss its relative  size and/or  ranking among  companies in  the industry  or
among   any  sub-classification  of  those   companies,  based  upon  recognized
evaluation criteria. For  example, at  year-end 1995  the Company  was the  39th
largest  U.S. life  insurance company based  upon overall assets  and its parent
company, Sun Life Assurance Company of Canada, was the 18th largest.
    
 
                                       86
<PAGE>
                                   SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
                                   ANNUITY SERVICE MAILING ADDRESS:
                                   C/O SUN LIFE ANNUITY SERVICE CENTER
                                   P.O. BOX 1024
                                   BOSTON, MASSACHUSETTS 02103
 
                                   TELEPHONE:
                                   Toll Free (800) 752-7215
                                   In Massachusetts (617) 348-9600
 
                                   GENERAL DISTRIBUTOR
                                   Clarendon Insurance Agency, Inc.
                                   500 Boylston Street
                                   Boston, Massachusetts 02116
 
                                   LEGAL COUNSEL
                                   Covington & Burling
                                   1201 Pennsylvania Avenue, N.W.
                                   P.O. Box 7566
                                   Washington, D.C. 20044
 
                                   AUDITORS
                                   Deloitte & Touche LLP
                                   125 Summer Street
                                   Boston, Massachusetts 02110
   
REGUS-1  5/97
    
<PAGE>
                                   PART II
                   INFORMATION NOT REQUIRED IN PROSPECTUS.

Item 14. Other Expenses of Issuance and Distribution


         Not applicable.


Item 15. Indemnification of Directors and Officers

     Article 8 of the By-Laws of Sun Life Assurance Company of Canada (U.S.) 
provides for indemnification of directors and officers as follows:

    "Section 8.01 (a).  Every person who is or was a director, officer or 
employee of this corporation or of any other corporation which he served at 
the request of this corporation and in which this corporation owns or owned 
shares of capital stock or of which it is or was a creditor shall have a 
right to be indemnified by this corporation against all liability and 
reasonable expenses incurred by him in connection with or resulting from any 
claim, action, suit or proceeding in which he may become involved as a party 
or otherwise by reason of his being or having been a director, officer or 
employee of this corporation or such other corporation, provided (1) said 
claim, action, suit or proceeding shall be prosecuted to a final 
determination and he shall be vindicated on the merits, or (2) in the absence 
of such a final determination vindicating him on the merits, the board of 
directors shall determine that he acted in good faith and in a manner he 
reasonably believed to be in or not opposed to the best interests of the 
corporation, and, with respect to any criminal action or proceeding, had no 
reasonable cause to believe his conduct was unlawful; said determination to 
be made by the board of directors acting through a quorum of disinterested 
directors, or in its absence on the opinion of counsel.

    (b)  For purposes of the preceding subsection: (1) "liability and 
reasonable expenses" shall include but not be limited to reasonable counsel 
fees and disbursements, amounts of any judgment, fine or penalty, and 
reasonable amounts paid in settlement; (2) "claim, action, suit or 
proceeding" shall  include every such  claim, action, suit or proceeding, 
whether civil or criminal, derivative or otherwise, administrative, judicial 
or legislative, any appeal relating thereto, and shall include any reasonable 
apprehension or threat of such a claim, action, suit or proceeding; (3) a 
settlement, plea of nolo contendere, consent judgment, adverse civil 
judgment, or conviction shall not of itself create a presumption that the 
conduct of the person seeking indemnification did not meet the standard of 
conduct set forth in subsection (a)(2) hereof.

                                     II-1


<PAGE>
      (c)  Notwithstanding the foregoing, the following limitations shall 
apply with respect to any action by or in the right of the Corporation: (1) 
no indemnification shall be made in respect of any claim, issue or matter as 
to which the person seeking indemnification shall have been adjudged to be 
liable for negligence or misconduct in the performance of his duty to the 
corporation unless and only to the extent that the Court of Chancery of the 
State of Delaware or the court in which such action or suit was brought shall 
determine upon application that, despite the adjudication of liability but in 
view of all the circumstances of the case, such person is fairly and  
reasonably entitled to indemnity for such expenses which the Court of 
Chancery or such other court shall deem proper; and (2) indemnification shall 
extend only to reasonable expenses, including reasonable counsel's fees and 
disbursements.

    (d)  The right of indemnification shall extend to any person otherwise 
entitled to it under this by-law whether or not that person continues to be a 
director, officer or employee of this corporation or such other corporation 
at the time such liability or expense shall be incurred.  The right of 
indemnification shall extend to the legal representative and heirs of any 
person otherwise entitled to indemnification.  If a person meets the 
requirements of this by-law with respect to some matters in a claim, action, 
suit or proceeding, but not with respect to others, he shall be entitled to 
indemnification as the former.  Advances against liability and expenses may 
be made by the corporation on terms fixed by the board of directors subject 
to an obligation to repay if indemnification proves unwarranted.

    (e)  This by-law shall not exclude any other rights of indemnification or 
other rights to which any director, officer or employee may be entitled to by 
contract, vote of the stockholders or as a matter of law. If any clause, 
provision or application of this section shall be determined to be invalid, 
the other clauses, provisions or applications of this section shall not be 
affected but shall remain in full force and effect.  The provisions of this 
by-law shall be applicable to claims, actions, suits or proceedings made or 
commenced after the adoption hereof, whether arising from acts or omissions 
to act occurring before or after the adoption hereof.

    (f)  Nothing contained in this by-law shall be construed to protect any 
director or officer of the corporation against any liability to the 
corporation or its security holders to which he would otherwise be subject by 
reason of wilful misfeasance, bad faith, gross negligence or reckless 
disregard of the duties involved in the conduct of his office."

                                     II-2

<PAGE>

Item 16. Exhibits

Exhibits:

Exhibit
Number                Description             Method of Filing

 1         Underwriting Agreement                **
 3(a)      Certificate of Incorporation          *
 3(b)      By-laws                               *
 4(a)      Combination Fixed/Variable Group
             Annuity Contract                    **
 4(b)      Certificate to be used in con-
             nection with Contract filed as
             Exhibit 4(a)                        **
 5         Opinion re: Legality                  **
23         Consents of Experts and Counsel
           (a) Independent Auditors' Consent     Filed Herewith
           (b) Consent of Counsel                Filed Herewith
24         Powers of Attorney                    ***


*      Incorporated by reference from the Registration Statement of the 
       Registrant on Form S-1, File No. 33-29851.

**     Incorporated by reference from Pre-effective Amendment No. 1 to the 
       Registration Statement of the Registrant on Form S-2, File No. 33-29851.

***    Incorporated by reference from  Post-effective Amendment No. 3 to the 
       Registration Statement of the Registrant on Form S-2, File No. 33-41858.


Item 17. Undertakings

      (a)     The undersigned Registrant hereby undertakes:
          (1)  To file, during any period in which offers or sales are being 
      made, a post-effective amendment to this registration statement:

              (i)  To include any prospectus required by Section 10(a)(3) of 
          the Securities Act of 1933;

              (ii) To reflect in the prospectus any facts or events arising 
          after the effective date of the registration statement (or the most 
          recent post-effective amendment thereof) which, individually or in 
         the aggregate, represent a fundamental change in the information set 
         forth in the registration statement;

                                     II-3

<PAGE>
              (iii) To include any material information with respect to the 
         plan of distribution not previously disclosed in the registration 
         statement or any material change to such information in the 
         registration statement;

              Provided, however, that paragraphs (a)(1)(i) and a(1)(ii) do 
         not apply if the registration statement is on Form S-3 or Form S-8, 
         and the information required to be included in a post-effective 
         amendment by those paragraphs is contained in periodic reports filed 
         by the registrant pursuant to Section 13 or Section 15(d) of the 
         Securities Exchange Act of 1934 that are incorporated by reference in
         the registration statement.

         (2)  That, for the purpose of determining any liability under the 
    Securities Act of 1933, each such post-effective amendment shall be 
    deemed to be a new registration statement relating to the securities 
    offered therein, and the offering of such securities at that time shall be 
    deemed to be the initial bona fide offering thereof.

         (3)  To remove from registration by means of a post- effective 
    amendment any of the securities being registered which remain unsold at 
    the termination of the offering.

    The undersigned registrant hereby undertakes that, for purposes of 
determining any liability under the Securities Act of 1933, each filing of 
the registrant's annual report pursuant to Section 13(a) or Section 15(d) of 
the Securities Exchange Act of 1934 (and where applicable, each filing of an 
employee benefit plan's annual report pursuant to Section 15(d) of the 
Securities Exchange Act of 1934) that is incorporated by reference in the 
registration statement shall be deemed to be a new registration statement 
relating to the securities offered therein, and the offering of such 
securities at that time shall be deemed to be the initial bona fide offering 
thereof.

    Insofar as indemnification for liabilities arising under the Securities 
Act of 1933 may be permitted to directors, officers and controlling persons 
of the registrant pursuant to the foregoing provisions, or otherwise, the 
registrant has been advised that in the opinion of the Securities and 
Exchange Commission such indemnification is against public policy as expressed 
in the Act and is, therefore, unenforceable.  In the event that a claim for 
indemnification against such liabilities (other than the payment by the 
registrant of expenses incurred or paid by a director, officer or controlling 
person of the registrant in the successful defense of any action, suit or 
proceeding) is asserted by such director, officer or controlling person in 
connection with the securities being registered, the registrant will, unless 
in the opinion of its counsel the matter has been settled by controlling 
precedent, submit to a court of appropriate jurisdiction the question whether
such indemnification by it is against public policy as expressed in the Act and 
will be governed by the final adjudication of such issue.

                                     II-4

<PAGE>
                                  SIGNATURES


   
     Pursuant to the requirements of the Securities Act of 1933, the 
Registrant, Sun Life Assurance Company of Canada (U.S.), certifies that it 
has reasonable grounds to believe that it meets all of the requirements for 
filing on Form S-2 and has duly caused this Post-Effective Amendment No. 6 to 
its Registration Statement on Form S-2 to be signed on its behalf by the 
undersigned, thereunto duly authorized, in the Town of Wellesley, Commonwealth
of Massachusetts, on the 30th day of April, 1997.
    


                                  Sun Life Assurance Company of
                                  Canada (U.S.)
                                   
                                  (Registrant)


                                  By:*    /s/ JOHN D. McNEIL   
                                       -------------------------  
                                              John D. McNeil
                                              Chairman


   
    Pursuant to the requirements of the Securities Act of 1933, this 
Post-Effective Amendment No. 6 to the Registration Statement has been signed by
the following persons in the capacities and on the dates indicated.
    


    SIGNATURE                           TITLE                    DATE    


   
*  /s/ JOHN D. McNEIL            Chairman and Director
- --------------------------     (Principal Executive Officer)  April 30, 1997
   John D. McNeil
 
*  /s/  ROBERT P. VROLYK          Vice President and Actuary
- ----------------------------       (Principal Financial
     Robert P. Vrolyk              & Accounting Officer)      April 30, 1997

*  /s/ RICHARD B. BAILEY                Director              April 30, 1997
- ----------------------------
     Richard B. Bailey

- --------------------
* By Bonnie S. Angus pursuant to Power of Attorney filed with Post-Effective 
  Amendment No. 3 to the Registration Statement of the Registrant on Form 
  S-2, File No. 33-41858.
    

                                     II-5

<PAGE>

    SIGNATURE                           TITLE                    DATE    


   
*   /s/ A. KEITH BRODKIN                Director            April 30, 1997
- ------------------------------
      A. Keith Brodkin

*   /s/ M. COLYER CRUM
- -------------------------------         Director            April 30, 1997
       M. Colyer Crum

                                  President and Director
- -------------------------------
      Donald A. Stewart

*   /s/ DAVID D. HORN              Senior Vice President
- --------------------------------    and General Manager     April 30, 1997
        David D. Horn                   Director

*   /s/ JOHN S. LANE                      Director          April 30, 1997
- --------------------------------
        John S. Lane

*   /s/ ANGUS A. MacNAUGHTON              Director          April 30, 1997
- ---------------------------------
     Angus A. MacNaughton

                                   Senior Vice President
- --------------------------------    and Deputy General      
        S. Caesar Raboy             Manager and Director

- -----------------------
*  By Bonnie S. Angus pursuant to Power of Attorney filed with the
   Post-Effective Amendment No. 3 to the Registration Statement of the 
   Registrant on Form S-2, File No. 33-41858.
    

                                     II-6

<PAGE>
                                  EXHIBIT INDEX

Exhibit
Number                                              Page

 1       Underwriting Agreement....................    **
 3(a)    Certificate of Incorporation..............    *
 3(b)    By-Laws...................................    *
 4(a)    Combination Fixed/Variable Group Annuity
           Contract................................    **
 4(b)    Certificate to be issued in connection with
           Contract Filed as Exhibit 4(a)..........    **
 5       Opinion Re: Legality......................    **
23(a)    Independent Auditors' Consent.............  
23(b)    Consent of Counsel........................  
24       Powers of Attorney........................    ***

- -------------------------
*      Filed with the Registration Statement of the Registrant on Form S-1, 
       File No. 33-29851.

**     Filed with Pre-effective Amendment No. 1 to the Registration Statement 
       of the Registrant on Form S-2, File No. 33-29851.
   
***    Filed with Post-effective Amendment No. 3 to the Registration Statement 
       of the Registrant on Form S-2, File No. 33-41858.
    


                                  II-7



<PAGE>
                                                Exhibit 23(a)

                    INDEPENDENT AUDITORS' CONSENT


   
     We consent to the use in Post-Effective Amendment No. 6 to the 
Registration Statement on Form S-2 of Sun Life Assurance Company of 
Canada (U.S.) (Reg. No. 33-41858) of our report dated February 7, 1997
accompanying the financial statements of Sun Life of Canada (U.S.) Variable 
Account F and to the use of our report dated February 3, 1997 accompanying the 
financial statements of Sun Life Assurance Company of Canada (U.S.) 
appearing in the Prospectus, which is part of such Registration Statement, 
and to the incorporation by reference of our reports dated February 3, 1997 
appearing in the Annual Report on Form 10-K of Sun Life Assurance Company of 
Canada (U.S.) for the year ended December 31, 1996.
    


We also consent to the reference to us under the heading "Condensed 
Financial Information - Accumulation Unit Values" in such Prospectus.




DELOITTE & TOUCHE LLP
Boston, Massachusetts

   
April 30, 1997
    




<PAGE>
                                               Exhibit 23(b)


                          CONSENT OF COUNSEL


   
     I hereby consent to the reference to me in Post-Effective Amendment 
No. 6 to the Registration Statement on Form S-2 of Sun Life Assurance Company of
Canada (U.S.) under the caption "Legal Matters" in the Prospectus contained 
therein.
    


                                      DAVID D. HORN, ESQ.



   
April 30, 1997
    




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