SUN LIFE ASSURANCE CO OF CANADA US
POS AM, 1999-04-30
LIFE INSURANCE
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<PAGE>
   
    As Filed with the Securities and Exchange Commission on April 30, 1999
    

                                                       REGISTRATION NO. 33-41858

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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

   
                        POST-EFFECTIVE AMENDMENT NO. 8
                                       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 02481
                                 (781) 237-6030
         (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING
            AREA CODE, OF REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
    

   
                                                          COPIES TO:
       EDWARD M. SHEA, ASSISTANT VICE               DAVID N. BROWN, ESQ.
        PRESIDENT AND SENIOR COUNSEL                 COVINGTON & BURLING      
     SUN LIFE ASSURANCE COMPANY OF              1201 PENNSYLVANIA AVENUE N.W. 
             CANADA (U.S.)                             P.O. BOX 7566          
     RETIREMENT PRODUCTS AND SERVICES              WASHINGTON, D.C. 20044     
            ONE COPLEY PLACE                           (202) 662-5238         
      BOSTON, MASSACHUSETTS 02116              
            (617) 348-9615           
    

 (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
        INCLUDING AREA CODE, OF AGENT FOR SERVICE)

                                 --------------
   
Approximate date of commencement of proposed sale to the public: From time to 
time after the effective date hereof.

If any of the securities being registered on this Form are to be offered on a 
delayed or continuous basis pursuant to Rule 415 under the Securities Act, 
check the following box.                                                   /X/
    
<PAGE>
                  SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
 
   
                                                                     MAY 3, 1999
    
 
                                    PROFILE
 
   
                                  MFS REGATTA
                               VARIABLE AND FIXED
                                    ANNUITY
    
 
      THIS PROFILE IS A SUMMARY OF SOME OF THE MORE IMPORTANT POINTS THAT YOU
SHOULD KNOW AND CONSIDER BEFORE PURCHASING THE CONTRACT. THE CONTRACT IS MORE
FULLY DESCRIBED IN THE FULL PROSPECTUS WHICH ACCOMPANIES THIS PROFILE. PLEASE
READ THE PROSPECTUS CAREFULLY.
 
   
      1. THE MFS REGATTA ANNUITY
    
 
   
      The MFS Regatta Annuity is a single payment deferred annuity contract
("Contract") designed for use in connection with retirement and deferred
compensation plans, some of which may qualify for favorable federal income tax
treatment. The Contract is intended to help you achieve your retirement savings
or other long-term investment goals.
    
 
   
      The Contract has two phases: an Accumulation Phase and an Income Phase.
During the Accumulation Phase any investment earnings under your Contract
accumulate on a tax-deferred basis and are taxed as income only when withdrawn.
You determine the length of the Accumulation Phase. During the Income Phase, we
make annuity payments in amounts determined in part by the amount of money you
have accumulated under your Contract during the Accumulation Phase. You choose
when the Income Phase begins.
    
 
   
      You may choose among 7 variable investment options and a range of fixed
interest options. For a variable investment return you choose one or more
Sub-Accounts in our Variable Account, each of which invests in shares of a
corresponding series of the MFS/Sun Life Series Trust (collectively, the
"Series") listed in Section 4. The value of any portion of your Contract
allocated to the Sub-Accounts will fluctuate up or down depending on the
performance of the Series you select, and you may experience losses. For a fixed
interest rate, you may choose one or more Guarantee Periods offered in our Fixed
Account, each of which earns its own Guaranteed Interest Rate if you keep your
money in that Guarantee Period for the specified length of time.
    
 
   
      The Contract is designed to meet your need for investment flexibility.
Until we begin making annuity payments under your Contract, you can, subject to
certain limitations, transfer money between options up to 12 times each year
without a transfer charge or adverse tax consequences.
    
 
      2. ANNUITY PAYMENTS (THE INCOME PHASE)
 
      Just as you can elect to have your Contract value accumulate on either a
variable or fixed basis, or a combination of both, you can elect to receive
annuity payments on either a variable or fixed basis or both. If you choose to
have any part of your annuity payments come from the Sub-Accounts, the dollar
amount of your annuity payments may fluctuate.
 
   
      The Contract offers a variety of annuity options. You can select from
among the following methods of receiving either variable or fixed annuity
payments under your Contract: (1) monthly payments continuing for your lifetime
(assuming you are the annuitant); (2) monthly payments for your lifetime, but
with payments continuing to your chosen beneficiary for 5, 10, 15 or 20 years if
you die before the end of the period you have selected; (3) monthly payments for
your lifetime and the life of another person (usually your spouse) you have
chosen; and (4) monthly payments for a specified number of years (between 5 and
30), with a cash-out option for variable payments. You can also select a fixed
payment option where we will hold the amount applied to provide fixed annuity
payments with interest accrued at the rate we determine from time to time, which
will be at least 4% per year. We may also agree to other annuity options in our
discretion.
    
 
      Once the Income Phase begins, you cannot change your choice of annuity
payment method.
<PAGE>
      3. PURCHASING A CONTRACT
 
   
      You may purchase a Contract for $5,000 or more, under most circumstances.
We will not accept a Purchase Payment over $1 million unless we have approved
the Payment in advance.
    
 
      4. ALLOCATION OPTIONS
 
      You can allocate your money among Sub-Accounts investing in the following
Series of the MFS/ Sun Life Series Trust:
 
   
<TABLE>
<S>                                   <C>
Capital Appreciation Series           Managed Sectors Series
Global Governments Series             Money Market Series
Government Securities Series          Total Return Series
High Yield Series
</TABLE>
    
 
   
      Market conditions will determine the value of an investment in any Series.
Each Series is described in the Prospectus of the MFS/Sun Life Series Trust.
    
 
      In addition to these variable options, you may also allocate your money to
one or more of the Guarantee Periods we make available. For each Guarantee
Period, we offer a Guaranteed Interest Rate for the specified length of time.
 
      5. EXPENSES
 
      The charges under the Contracts are as follows:
 
   
      We impose an annual Account Fee equal to the lesser of $30 or 2% of the
value of your Contract. We also deduct insurance charges (which include an
administrative expense charge) equal to 1.40% per year of the average daily
value of the Contract allocated among the Sub-Accounts.
    
 
   
      There are no sales charges when you purchase your MFS Regatta Annuity.
However, if you withdraw money from your Contract, we will, with certain
exceptions, impose a withdrawal charge. Your Contract allows a "free withdrawal
amount," which you may withdraw before you incur the withdrawal charge. The rest
of your withdrawal is subject to a withdrawal charge equal to a percentage of
your withdrawal and is determined in accordance with the table below. The
percentage varies according to the Account Year in which you make the
withdrawal.
    
 
   
<TABLE>
<CAPTION>
ACCOUNT YEAR      WITHDRAWAL CHARGE
- -------------  -----------------------
<S>            <C>
           1                 6%
           2                 6%
           3                 5%
           4                 5%
           5                 4%
           6                 4%
           7                 3%
   8 or more                 0%
</TABLE>
    
 
   
      If you withdraw, transfer, or annuitize money allocated to a Guarantee
Period more than 30 days before the expiration date of the Guarantee Period, the
amount will be subject to a Market Value Adjustment. This adjustment reflects
the relationship between our current Guaranteed Interest Rates and the
Guaranteed Interest Rate applicable to the amount being withdrawn. If your
Guaranteed Interest Rate is more than 0.50% higher than the Guaranteed Interest
Rate we currently declare for Guarantee Periods equal to the balance of your
Guarantee Period, the Market Value Adjustment will increase your Account Value.
Otherwise, the Market Value will decrease your Account Value.
    
 
   
      In addition to the charges we impose under the Contracts, there are
charges (which include management fees and operating expenses) imposed by each
Series, which range from 0.56% to 0.88% of the average net assets of the Series,
depending upon which Series you have selected. The investment adviser has agreed
to waive or reimburse a portion of expenses for some of the Series; without this
agreement, Series expenses could be higher.
    
 
                                       2
<PAGE>
      The following chart is designed to help you understand the expenses you
will incur under your Contract, if you invest in one or more of the
Sub-Accounts. The column "Total Annual Expenses" shows the sum of the "Total
Annual Insurance Charges," as defined just above the chart, and the total
expenses for each Series. The next two columns show two examples of the
expenses, in dollars, you would pay under a Contract. The examples assume that
you invested $1,000 in a Contract which earns 5% annually and that you withdraw
your money (1) at the end of one year or (2) at the end of 10 years. For the
first year, the Total Annual Expenses are deducted, as well as withdrawal
charges. For year 10, the example shows the aggregate of all of the annual
expenses deducted for the 10 years, but there is no withdrawal charge.
 
   
      "Total Annual Insurance Charges" include the insurance charges of 1.40%,
plus an additional 0.10%, which is used to represent the $30 annual Account Fee
based on an assumed Contract value of $30,000. The actual impact of the Account
Fee may be greater or less than 0.10%, depending upon the value of your
Contract.
    
 
   
<TABLE>
<CAPTION>
                                                                                                        EXAMPLES:
                                                    TOTAL ANNUAL     TOTAL ANNUAL       TOTAL         TOTAL EXPENSES
                                                     INSURANCE          SERIES         ANNUAL             AT END
SUB-ACCOUNT                                           CHARGES          EXPENSES       EXPENSES     1 YEAR     10 YEARS
- ------------------------------------------------  ----------------  ---------------  -----------  ---------  -----------
<S>                                               <C>               <C>              <C>          <C>        <C>
Capital Appreciation Series                            1.50%               0.77%          2.27%   $      79   $     261
                                                  (1.40% + 0.10%)
Global Governments Series                              1.50%               0.88%          2.38%   $      80   $     272
                                                  (1.40% + 0.10%)
Government Securities Series                           1.50%               0.62%          2.12%   $      77   $     245
                                                  (1.40% + 0.10%)
High Yield Series                                      1.50%               0.82%          2.32%   $      79   $     266
                                                  (1.40% + 0.10%)
Managed Sectors Series                                 1.50%               0.80%          2.30%   $      79   $     264
                                                  (1.40% + 0.10%)
Money Market Series                                    1.50%               0.56%          2.06%   $      77   $     239
                                                  (1.40% + 0.10%)
Total Return Series                                    1.50%               0.70%          2.20%   $      78   $     253
                                                  (1.40% + 0.10%)
</TABLE>
    
 
      For more detailed information about Contract fees and expenses, please
refer to the fee table and discussion of Contract charges contained in the full
Prospectus which accompanies this Profile.
 
      6. TAXES
 
      Your earnings are not taxed until you take them out of your Contract. If
you take money out, earnings come out first and are taxed as income. If you are
younger than 59 1/2 when you take money out, you may be charged a 10% federal
penalty tax on the earnings. Annuity payments during the Income Phase are
considered in part a return of your original investment. That portion of each
payment is not taxable as income, unless your Contract is funded with pre-tax or
tax deductible dollars (such as with a pension or IRA contribution), in which
case the entire payment will be taxable. In all cases, you should consult with
your tax adviser for specific tax information.
 
      7. ACCESS TO YOUR MONEY
 
   
      You can withdraw money from your Contract at any time during the
Accumulation Phase. During the first 7 Account Years, 10% of your Purchase
Payment may be withdrawn each year without the imposition of a withdrawal
charge. All other amounts you withdraw during the first 7 Account Years will be
subject to a withdrawal charge ranging from 6% to 0% of your Purchase Payment.
You may also be required to pay income tax and possible tax penalties on any
money you withdraw.
    
 
   
      We do not assess a withdrawal charge upon annuitization or transfers. In
addition, there may be other circumstances under which we may waive the
withdrawal charge.
    
 
      In addition to the withdrawal charge, amounts you withdraw, transfer or
annuitize from the Fixed Account before your Guarantee Period has ended may be
subject to a Market Value Adjustment.
 
                                       3
<PAGE>
      8. PERFORMANCE
 
      If you invest in one or more Sub-Accounts, the value of your Contract will
increase or decrease depending upon the investment performance of the Series you
choose.
 
      The following chart shows total returns for investment in the Sub-Accounts
where the corresponding Series has at least one full calendar year of
operations. The returns reflect all charges and deductions of the Series and
Sub-Accounts and deduction of the Annual Account Fee. They do not reflect
deduction of any withdrawal charges or premium taxes. These charges, if
included, would reduce the performance numbers shown. Past performance is not a
guarantee of future results.
   
<TABLE>
<CAPTION>
                                                                              CALENDAR YEAR
                                           -----------------------------------------------------------------------------------
 SUB-ACCOUNT                                 1998        1997       1996      1995       1994      1993       1992      1991
 ----------------------------------------  ---------   ---------   -------   -------   --------   -------   --------   -------
 <S>                                       <C>         <C>         <C>       <C>       <C>        <C>       <C>        <C>
 Capital Appreciation Series                 26.83%      21.33%     19.70%    32.51%    (5.03)%    16.27%    12.08%     38.86%
 Global Governments Series                   13.77%      (2.24)%     3.11%    14.00%    (5.91)%    17.13%    (1.02)%    13.18%
 Government Securities Series                 7.13%       7.15%      0.11%    15.92%    (3.61)%     7.11%     5.24%     14.11%
 High Yield Series                           (0.88)%     11.55%     10.46%    15.32%    (3.68)%    15.99%    13.33%     45.40%
 Managed Sectors Series                      10.62%      23.80%     15.86%    30.34%    (3.38)%     2.52%     4.92%     59.76%
 Money Market Series                          3.48%       3.52%      3.37%     3.90%     2.17%      1.11%     1.81%      4.25%
 Total Return Series                         10.10%      20.18%     12.38%    24.93%    (3.71)%    11.72%     6.98%     19.81%
 
<CAPTION>
 
 SUB-ACCOUNT                                 1990
 ----------------------------------------  ---------
 <S>                                       <C>
 Capital Appreciation Series                (10.99)%
 Global Governments Series                   11.79%
 Government Securities Series                 7.11%
 High Yield Series                          (15.24)%
 Managed Sectors Series                     (11.74)%
 Money Market Series                          6.23%
 Total Return Series                          1.17%
</TABLE>
    
 
      9. DEATH BENEFIT
 
   
      If the Annuitant dies before the Contract reaches the Income Phase, the
beneficiary will receive a death benefit. To calculate the death benefit, we use
a "Death Benefit Date", which is the earliest date we have both due proof of
death and a written request specifying the manner of payment.
    
 
   
      The death benefit is the greatest of:
    
 
      (1) the value of the Contract on the Death Benefit Date;
 
      (2) the amount we would pay in the event of a full surrender of the
          Contract on the Death Benefit Date;
 
   
      (3) the value of the Contract on the most recent 7 year anniversary of the
          Contract adjusted for any partial withdrawals and charges made after
          that anniversary;
    
 
   
      (4) your Purchase Payment less any partial withdrawals.
    
 
      10. OTHER INFORMATION
 
      FREE LOOK. Depending upon applicable state law, if you cancel your
Contract within 10 days after receiving it we will send you the value of your
Contract as of the day we received your cancellation request (this may be more
or less than the original purchase payment) and we will not deduct a withdrawal
charge. However, if applicable state or federal law requires, we will refund the
full amount of any purchase payment(s) we receive and the "free look" period may
be greater than 10 days.
 
      NO PROBATE. In most cases, when you die, the beneficiary will receive the
death benefit without going through probate. However, avoiding probate does not
mean that the beneficiary will not have tax liability as a result of receiving
the death benefit.
 
   
      WHO SHOULD PURCHASE A CONTRACT? The Contract is designed for those seeking
long-term tax deferred accumulation of assets and annuity features, generally
for retirement or other long-term purposes. The tax-deferred feature is most
attractive to purchasers in high federal and state income tax brackets. You
should note that qualified retirement investments automatically provide tax
deferred, regardless of whether the underlying Contract is an annuity. You
should not buy a Contract if you are looking for a short-term investment or if
you cannot risk a decrease in the value of your investment.
    
 
      CONFIRMATIONS AND QUARTERLY STATEMENTS. You will receive a confirmation of
each transaction within your Contract. On a quarterly basis, you will receive a
complete statement of your transactions over the past quarter and a summary of
your account values during that period.
 
                                       4
<PAGE>
   
      11. INQUIRIES
    
 
      If you would like more information about buying a Contract, please contact
your broker or registered representative. If you have any other questions,
please contact us at:
 
     SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
     ANNUITY SERVICE MAILING ADDRESS
     C/O RETIREMENT PRODUCTS AND SERVICES
     P.O. BOX 1024
     BOSTON, MASSACHUSETTS 02103
     TEL: TOLL FREE (800) 752-7215
       IN MASSACHUSETTS (617) 348-9600
 
                                       5
<PAGE>












                              PART I



<PAGE>
   
                                                                      PROSPECTUS
                                                                     MAY 3, 1999
    
 
   
                                  MFS REGATTA
    
 
   
      Sun Life Assurance Company of Canada (U.S.) and Sun Life of Canada (U.S.)
Variable Account F offer the flexible payment deferred annuity contracts
described in this Prospectus on a group basis.
    
 
   
      You may choose among 7 variable investment options and a range of fixed
options. The variable options are Sub-Accounts in the Variable Account. Each
Sub-Account invests in one of the following series of the MFS/Sun Life Series
Trust (the "Series Fund"), a mutual fund advised by our affiliate, Massachusetts
Financial Services Company:
    
 
   
<TABLE>
<S>                                   <C>
Capital Appreciation Series           Managed Sectors Series
Global Governments Series             Money Market Series
Government Securities Series          Total Return Series
High Yield Series
</TABLE>
    
 
      The fixed account options are available for specified time periods, called
Guarantee Periods, and pay interest at a guaranteed rate for each period.
 
   
      THIS PROSPECTUS MUST BE ACCOMPANIED BY A CURRENT PROSPECTUS FOR THE SERIES
FUND. PLEASE READ THIS PROSPECTUS AND THE SERIES FUND PROSPECTUS CAREFULLY
BEFORE INVESTING AND KEEP THEM FOR FUTURE REFERENCE. THEY CONTAIN IMPORTANT
INFORMATION ABOUT THE MFS REGATTA ANNUITY AND THE SERIES FUND.
    
 
   
      We have filed a Statement of Additional Information dated May 3, 1999 (the
"SAI") with the Securities and Exchange Commission (the "SEC"), which is
incorporated by reference in this Prospectus. The table of contents for the SAI
is on page 70 of this Prospectus. You may obtain a copy without charge by
writing to our Annuity Service Mailing Address or by telephoning (800) 752-7215
or (617) 348-9600. In addition, the SEC maintains a website (http://www.sec.gov)
that contains the SAI, material incorporated by reference, and other information
regarding companies that file with the SEC.
    
 
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.
 
THE SEC HAS NOT APPROVED OR DISAPPROVED THESE SECURITIES OR PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.
 
ANY REFERENCE IN THIS PROSPECTUS TO RECEIPT BY US MEANS RECEIPT AT THE FOLLOWING
ADDRESS:
 
     ANNUITY SERVICE MAILING ADDRESS, C/O SUN LIFE ASSURANCE COMPANY OF CANADA
     (U.S.)
     RETIREMENT PRODUCTS AND SERVICES, P.O. BOX 1024, BOSTON, MASSACHUSETTS
     02103
 
                                       1
<PAGE>
                               TABLE OF CONTENTS
 
   
<TABLE>
<CAPTION>
                                                                                                               PAGE
<S>                                                                                                          <C>
Special Terms                                                                                                        4
Expense Summary                                                                                                      4
Summary of Contract Expenses                                                                                         4
Series Fund Annual Expenses                                                                                          5
Examples                                                                                                             5
Condensed Financial Information                                                                                      6
The MFS Regatta Annuity                                                                                              6
Communicating To Us About Your Contract                                                                              6
Sun Life Assurance Company of Canada (U.S.)                                                                          7
The Variable Account                                                                                                 7
Variable Account Options: The MFS/Sun Life Series Trust                                                              7
The Fixed Account                                                                                                    9
The Fixed Account Options: The Guarantee Periods                                                                     9
The Accumulation Phase                                                                                               9
    Issuing Your Contract                                                                                            9
    Amount and Frequency of Purchase Payments                                                                       10
    Allocation of Net Purchase Payments                                                                             10
    Your Account                                                                                                    10
    Your Account Value                                                                                              10
    Variable Account Value                                                                                          10
    Fixed Account Value                                                                                             11
    Transfer Privilege                                                                                              11
Withdrawals, Withdrawal Charge and Market Value Adjustment                                                          12
    Cash Withdrawals                                                                                                12
    Withdrawal Charge                                                                                               14
    Market Value Adjustment                                                                                         14
Contract Charges                                                                                                    15
    Account Fee                                                                                                     15
    Administrative Expense Charge                                                                                   15
    Mortality and Expense Risk Charge                                                                               15
    Premium Taxes                                                                                                   16
    Series Fund Expenses                                                                                            16
    Modification in the Case of Group Contracts                                                                     16
Death Benefit                                                                                                       16
    Amount of Death Benefit                                                                                         16
    Method of Paying Death Benefit                                                                                  17
    Selection and Change of Beneficiary                                                                             17
    Payment of Death Benefit                                                                                        17
    Due Proof of Death                                                                                              17
The Income Phase -- Annuity Provisions                                                                              17
    Selection of the Annuitant or Co-Annuitant                                                                      18
    Selection of the Annuity Commencement Date                                                                      18
    Annuity Options                                                                                                 18
    Selection of Annuity Option                                                                                     19
    Amount of Annuity Payments                                                                                      20
    Exchange of Variable Annuity Units                                                                              21
    Account Fee                                                                                                     21
    Annuity Payment Rates                                                                                           21
    Annuity Options as Method of Payment for Death Benefit                                                          21
Other Contract Provisions                                                                                           21
    Exercise of Contract Rights                                                                                     21
</TABLE>
    
 
                                       2
<PAGE>
   
<TABLE>
<S>                                                                                                          <C>
    Change of Ownership                                                                                             21
    Death of Participant                                                                                            22
    Voting of Series Fund Shares                                                                                    23
    Periodic Reports                                                                                                23
    Substitution of Securities                                                                                      24
    Change in Operation of Variable Account                                                                         24
    Splitting Units                                                                                                 24
    Modification                                                                                                    24
    Discontinuance of New Participants                                                                              25
    Reservation of Rights                                                                                           25
    Right to Return                                                                                                 25
Federal Tax Status                                                                                                  25
    Introduction                                                                                                    25
    Deductibility of Purchase Payments                                                                              25
    Pre-Distribution Taxation of Contracts                                                                          26
    Distributions and Withdrawals from Non-Qualified Contracts                                                      26
    Distribution and Withdrawals from Qualified Contracts                                                           26
    Withholding                                                                                                     27
    Purchase of Immediate Annuity Contract and Deferred Annuity Contract                                            27
    Investment Diversification and Control                                                                          27
    Tax Treatment of the Company and the Variable Account                                                           27
    Qualified Retirement Plans                                                                                      27
    Pension and Profit-Sharing Plans                                                                                28
    Tax-Sheltered Annuities                                                                                         28
    Individual Retirement Accounts                                                                                  28
    Roth IRAs                                                                                                       29
Administration of the Contracts                                                                                     29
Distribution of the Contracts                                                                                       29
Performance Information                                                                                             29
Available Information                                                                                               30
Incorporation of Certain Documents by Reference                                                                     31
Additional Information About the Company                                                                            31
    Business of the Company                                                                                         31
    Selected Financial Data                                                                                         32
    Management's Discussion and Analysis of Financial Condition and Results of Operations                           32
    Capital Resources                                                                                               39
    Demutualization                                                                                                 40
    Year 2000 Compliance                                                                                            40
    Sale of Subsidiary                                                                                              41
    Quantitative and Qualitative Disclosures About Market Risk                                                      41
    Reinsurance                                                                                                     43
    Reserves                                                                                                        44
    Investments                                                                                                     44
    Competition                                                                                                     44
    Employees                                                                                                       44
    Properties                                                                                                      44
    State Regulation                                                                                                44
Legal Proceedings                                                                                                   45
Accountants                                                                                                         45
Financial Statements                                                                                                45
Table of Contents of Statement of Additional Information                                                            70
Appendix A -- Glossary                                                                                              72
Appendix B -- Condensed Financial Information-- Accumulation Unit Values                                            75
Appendix C -- Withdrawals, Withdrawal Charges and the Market Value Adjustment                                       76
</TABLE>
    
 
                                       3
<PAGE>
                                 SPECIAL TERMS
 
      Your Contract is a legal document that uses a number of specially defined
terms. We explain most of the terms that we use in this Prospectus in the
context where they arise, and some are self-explanatory. In addition, for
convenient reference, we have compiled a list of these terms in the Glossary
included at the back of this Prospectus as Appendix A. If, while you are reading
this Prospectus, you come across a term that you do not understand, please refer
to the Glossary for an explanation.
 
                                EXPENSE SUMMARY
 
   
      The purpose of the following table is to help you understand the costs and
expenses that you will bear directly and indirectly under a Contract WHEN YOU
ALLOCATE MONEY TO THE VARIABLE ACCOUNT. The table reflects expenses of the
Variable Account as well as of each Series of the Series Fund. The table should
be considered together with the narrative provided under the heading "Contract
Charges" in this Prospectus, and with the Series Fund's prospectus. In addition
to the expenses listed below, we may deduct premium taxes.
    
 
                          SUMMARY OF CONTRACT EXPENSES
 
   
<TABLE>
<S>                                                                                  <C>
TRANSACTION EXPENSES
Sales Load Imposed on Purchase Payments............................................       $  0
Deferred Sales Load (as a percentage of Purchase Payment withdrawn) (1)
  Number of Account Years
    1..............................................................................          6%
    2..............................................................................          6%
    3..............................................................................          5%
    4..............................................................................          5%
    5..............................................................................          4%
    6..............................................................................          4%
    7..............................................................................          3%
    8 or more......................................................................          0%
Transfer Fee (2)...................................................................       $  0
ANNUAL ACCOUNT FEE per Contract (3)                                                       $ 30
VARIABLE ACCOUNT ANNUAL EXPENSES (as a percentage of average Variable Account
  assets)
  Mortality and Expense Risk Charge................................................       1.25%
  Administrative Expense Charge (4)................................................       0.15%
  Other Fees and Expenses of the Variable Account..................................       0.00%
                                                                                         -----
Total Variable Account Annual Expenses.............................................       1.40%
</TABLE>
    
 
- ------------------------
 
   
(1) A portion of your Account may be withdrawn each year without imposition of
    any withdrawal charge, and after 7 Account Years there will be no withdrawal
    charge.
    
 
(2) A Market Value Adjustment may be imposed on amounts transferred from or
    within the Fixed Account.
 
   
(3) The Annual Account Fee is the lesser of $30 and 2% of your Account Value.
    
 
   
(4) This charge is imposed only during the first seven Account Years.
    
 
                                       4
<PAGE>
                        SERIES FUND ANNUAL EXPENSES (1)
                  (AS A PERCENTAGE OF SERIES FUND NET ASSETS)
 
   
<TABLE>
<CAPTION>
                                                                             MANAGEMENT       OTHER     TOTAL FUND
                                                                                FEES        EXPENSES     EXPENSES
                                                                            -------------  -----------  -----------
<S>                                                                         <C>            <C>          <C>
Capital Appreciation Series...............................................        0.73%         0.04%        0.77%
Global Governments Series.................................................        0.75%         0.13%        0.88%
Government Securities Series..............................................        0.55%         0.07%        0.62%
High Yield Series.........................................................        0.75%         0.07%        0.82%
Managed Sectors Series....................................................        0.74%         0.06%        0.80%
Money Market Series.......................................................        0.50%         0.06%        0.56%
Total Return Series.......................................................        0.65%         0.05%        0.70%
</TABLE>
    
 
- ------------------------
 
(1) The information relating to Series Fund expenses was provided by the Series
    Fund and we have not independently verified it. You should consult the
    Series Fund prospectus for more information about Series Fund expenses
 
   
(2) Each Series has an expense offset arrangement which reduces the series'
    custodian fee based upon the amount of cash maintained by the Series with
    its custodian and dividend disbursing agent, and may enter into such other
    arrangements and directed brokerage arrangements (which would also have the
    effect of reducing the series' expenses). Any such fee reductions are not
    reflected under "Other Expenses."
    
 
                                    EXAMPLES
 
      If you surrender your Contract at the end of the applicable time period,
you would pay the following expenses on a $1,000 investment, assuming a 5%
annual return:
 
   
<TABLE>
<CAPTION>
                                                                              1 YEAR       3 YEARS      5 YEARS     10 YEARS
                                                                            -----------  -----------  -----------  -----------
<S>                                                                         <C>          <C>          <C>          <C>
Capital Appreciation Series...............................................   $      79    $     120    $     163    $     261
Global Governments Series.................................................   $      80    $     123    $     169    $     272
Government Securities Series..............................................   $      77    $     116    $     156    $     245
High Yield Series.........................................................   $      79    $     122    $     166    $     266
Managed Sectors Series....................................................   $      79    $     121    $     165    $     264
Money Market Series.......................................................   $      77    $     114    $     153    $     239
Total Return Series.......................................................   $      78    $     118    $     160    $     253
</TABLE>
    
 
      If you do NOT surrender your Contract, 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:
 
   
<TABLE>
<CAPTION>
                                                                              1 YEAR       3 YEARS      5 YEARS     10 YEARS
                                                                            -----------  -----------  -----------  -----------
<S>                                                                         <C>          <C>          <C>          <C>
Capital Appreciation Series...............................................   $      23    $      71    $     122    $     261
Global Governments Series.................................................   $      24    $      74    $     127    $     272
Government Securities Series..............................................   $      22    $      66    $     114    $     245
High Yield Series.........................................................   $      24    $      72    $     124    $     266
Managed Sectors Series....................................................   $      23    $      72    $     123    $     264
Money Market Series.......................................................   $      21    $      65    $     111    $     239
Total Return Series.......................................................   $      22    $      69    $     118    $     253
</TABLE>
    
 
      THE EXAMPLES SHOULD NOT BE CONSIDERED TO BE REPRESENTATIONS OF PAST OR
FUTURE EXPENSES, AND ACTUAL EXPENSES MAY BE GREATER OR LOWER THAN THOSE SHOWN.
 
                                       5
<PAGE>
                        CONDENSED FINANCIAL INFORMATION
 
   
      Historical information about the value of the units we use to measure the
variable portion of your Contract ("Variable Accumulation Units") is included in
the back of this Prospectus as Appendix B.
    
 
   
                            THE MFS REGATTA ANNUITY
    
 
   
      Sun Life Assurance Company of Canada (U.S.) (the "Company", "we" or "us")
and Sun Life of Canada (U.S.) Variable Account F (the "Variable Account") offer
the MFS Regatta Annuity on a group basis for use in connection with retirement
plans. We issue a Group Contract to the Owner covering all individuals
participating under the Group Contract. Each individual receives a Certificate
that evidences his or her participation under the Group Contract.
    
 
   
      In this Prospectus, unless we state otherwise, we refer to participating
individuals under Group Contracts as "Participants" and we address Participants
as "you"; we use the term "Contracts" to include Group Contracts and
Certificates issued under Group Contracts. For the purpose of determining
benefits under Group Contracts, we establish an Account for each Participant,
which we will refer to as "your" Account or a "Participant Account."
    
 
   
      The Contract provides a number of important benefits for your retirement
planning. It has an Accumulation Phase, during which your Purchase Payment is
allocated to one or more Variable Account or Fixed Account options, and an
Income Phase, during which we make payments based on the amount you have
accumulated. The Contract provides tax deferral, so that you do not pay taxes on
your earnings under the Contract until you withdraw them. It provides a death
benefit if you die during the Accumulation Phase. Finally, if you so elect,
during the Income Phase we will make payments to you or someone else for life or
for another period that you choose.
    
 
   
      You choose these benefits on a variable or fixed basis or a combination of
both. When you choose variable investment options or a Variable Annuity option,
your benefits will be responsive to changes in the economic environment,
including inflationary forces and changes in rates of return available from
different types of investments. With these options, you assume all investment
risk under the Contract. When you choose a Guarantee Period in our Fixed Account
or a Fixed Annuity option, we assume the investment risk, except in the case of
early withdrawals, where you bear the risk of unfavorable interest rate changes.
You also bear the risk that the interest rates we will offer in the future and
the rates we will use in determining your Fixed Annuity may not exceed our
minimum guaranteed rate, which is 4% per year, compounded annually.
    
 
      The Contracts are designed for use in connection with retirement and
deferred compensation plans, some of which qualify for favorable federal income
tax treatment under Sections 401, 403, 408 or 408A of the Internal Revenue Code.
The Contracts are also designed so that they 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. We refer to Contracts used with plans that receive favorable tax treatment
as "Qualified Contracts," and all others as "Non-Qualified Contracts."
 
                    COMMUNICATING TO US ABOUT YOUR CONTRACT
 
   
      All materials sent to us, including your Purchase Payment, must be sent to
our Annuity Service Mailing Address set forth on the first page of this
Prospectus. For all telephone communications, you must call (800) 752-7215 or
(617) 348-9600.
    
 
   
      Unless this Prospectus states differently, we will consider all materials
sent to us and all telephone communications to be received on the date we
actually receive them at the Annuity Service Mailing Address. However, we will
consider your Purchase Payment, withdrawal requests and transfer instructions to
be received on the next Business Day if we receive them (1) on a day that is not
a Business Day or (2) after 4:00 p.m., Eastern Time.
    
 
                                       6
<PAGE>
      When we specify that notice to us must be in writing, we reserve the
right, in our sole discretion, to accept notice in another form.
 
                  SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
 
      We are a stock life insurance company incorporated under the laws of
Delaware on January 12, 1970. We do business in 48 states, the District of
Columbia, and Puerto Rico, and we have an insurance company subsidiary that does
business in New York. Our Executive Office mailing address is One Sun Life
Executive Park, Wellesley Hills, Massachusetts 02481.
 
      We are an indirect wholly-owned subsidiary of Sun Life Assurance Company
of Canada ("Sun Life (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 U.S. states (except New York), the District of Columbia, Puerto Rico, the
Virgin Islands, Great Britain, Ireland, Hong Kong, Bermuda and the Philippines.
 
                              THE VARIABLE ACCOUNT
 
      We established the Variable Account as a separate account on July 13,
1989, pursuant to a resolution of our 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
other variable annuity contracts that provide benefits that 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 we conduct, all obligations arising under the
Contracts, including the promise to make annuity payments, are general corporate
obligations of the Company.
 
      The assets of the Variable Account are divided into Sub-Accounts. Each
Sub-Account invests exclusively in shares of a specific Series of the MFS/Sun
Life Series Trust (the "Series Fund"). All amounts allocated to the Variable
Account will be used to purchase Series Fund shares as designated by you 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, administrative expenses 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.
 
                           VARIABLE ACCOUNT OPTIONS:
                         THE MFS/SUN LIFE SERIES TRUST
 
      The MFS/Sun Life Series Trust (the "Series Fund") is an open-end
management investment company registered under the Investment Company Act of
1940. Our affiliate, Massachusetts Financial Services Company ("MFS"), serves as
the investment adviser to the Series Fund.
 
   
      The Series Fund is composed of 26 independent portfolios of securities,
each of which has separate investment objectives and policies. Shares of the
Series Fund are issued in 26 Series, each corresponding to one of the
portfolios. The Contracts provide for investment by the Sub-Accounts in shares
of the 7 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.
    
 
   
     CAPITAL APPRECIATION SERIES will seek to maximize capital appreciation by
     investing in securities of all types, with major emphasis on common stocks.
    
 
                                       7
<PAGE>
   
     GLOBAL GOVERNMENTS SERIES (formerly, World Governments Series) will seek to
     provide moderate current income, preservation of capital and growth of
     capital by investing in debt obligations that are issued or guaranteed as
     to principal and interest by either (i) the U.S. Government, its agencies,
     authorities, or instrumentalities, or (ii) the governments of foreign
     countries (to the extent that the Series' adviser believes that the higher
     yields available from foreign government securities are sufficient to
     justify the risks of investing in these securities).
    
 
   
     GOVERNMENT SECURITIES SERIES will seek current income and preservation of
     capital by investing in U.S. Government and U.S. Government-related
     securities.
    
 
   
     HIGH YIELD SERIES will seek high current income and capital appreciation by
     investing primarily in certain lower rated or unrated securities (possibly
     with equity features) of U.S. and foreign issuers (also known as "junk
     bonds").
    
 
   
     MANAGED SECTORS SERIES will seek capital appreciation by varying the
     weighting of its portfolio of common stocks among 13 sectors.
    
 
   
     MONEY MARKET SERIES 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.
    
 
   
     TOTAL RETURN SERIES 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 since many
     securities offering a better than average yield may also possess growth
     potential.
    
 
   
      The Series Fund pays fees to MFS for its services pursuant to investment
advisory agreements. MFS also serves as investment adviser to each of the funds
in the MFS Family of Funds, and to certain other investment companies
established by MFS and/or us. MFS Institutional Advisers, Inc., a wholly-owned
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
(including supervision of the sub-advisers noted below) is solely that of MFS.
We undertake no obligation in this regard.
    
 
   
      MFS may serve as the investment adviser to other mutual funds which have
similar investment goals and principal investment policies and risks as the
Series, and which may be managed by a Series' portfolio manager(s). While a
Series may have many similarities to these other funds, its investment
performance will differ from their investment performance. This is due to a
number of differences between a Series and these similar products, including
differences in sales charges, expense ratios and cash flows.
    
 
      The Series Fund also offers its shares to other separate accounts
established by the Company and our New York subsidiary in connection with
variable annuity and variable life insurance contracts. Although we do not
anticipate any disadvantages to this arrangement, there is a possibility that a
material conflict may arise between the interests of the Variable Account and
one or more of the other separate accounts investing in the Series Fund. A
conflict may occur due to differences in tax laws affecting the operations of
variable life and variable annuity separate accounts, or some other reason. We
and the Series Fund's Board of Trustees will monitor events for such conflicts,
and, in the event of a conflict, we will take steps necessary to remedy the
conflict, including withdrawal of the Variable Account from participation in the
Series which is involved in the conflict or substitution of shares of other
Series or other mutual funds.
 
   
      MORE COMPREHENSIVE INFORMATION ABOUT THE SERIES FUND AND THE MANAGEMENT,
INVESTMENT OBJECTIVES, POLICIES, RESTRICTIONS, EXPENSES AND POTENTIAL RISKS OF
EACH SERIES MAY BE FOUND IN THE ACCOMPANYING CURRENT PROSPECTUS OF THE SERIES
FUND. YOU SHOULD READ THE SERIES FUND PROSPECTUS CAREFULLY BEFORE INVESTING. THE
SERIES FUND'S STATEMENT OF ADDITIONAL INFORMATION IS AVAILABLE BY CALLING
1-800-752-7215.
    
 
                                       8
<PAGE>
                               THE FIXED ACCOUNT
 
      The Fixed Account is made up of all the general assets of the Company
other than those allocated to any separate account. Amounts you allocate to
Guarantee Periods become part of the Fixed Account, and are available to fund
the claims of all classes of our customers, including claims for benefits under
the Contracts.
 
      We will invest the assets of the Fixed Account in those assets we choose
that are allowed by applicable state insurance laws. 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. We intend to invest primarily in investment-grade fixed
income securities (i.e. rated by a nationally recognized rating service within
the four highest grades) or instruments we believe are of comparable quality. We
are 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. You will not have a direct or indirect interest in the Fixed Account
investments.
 
                           THE FIXED ACCOUNT OPTIONS:
                             THE GUARANTEE PERIODS
 
   
      You may elect one or more Guarantee Period(s) from those we make available
from time to time. We publish Guaranteed Interest Rates for each Guarantee
Period offered. We may change the Guaranteed Interest Rates we offer from time
to time, but no Guaranteed Interest Rate will ever be less than 4% per year,
compounded annually. Also, once we have accepted your allocation to a particular
Guarantee Period, we promise that the Guaranteed Interest Rate applicable to
that allocation will not change for the duration of the Guarantee Period.
    
 
   
      We determine Guaranteed Interest Rates in our discretion. We do not have a
specific formula for establishing the rates for different Guarantee Periods. Our
determination will be influenced by the interest rates on fixed income
investments in which we may invest with amounts allocated to the Guarantee
Periods. We will also consider other factors in determining these rates,
including regulatory and tax requirements, sales commissions and administrative
expenses borne by us, general economic trends and competitive factors. We cannot
predict the level of future interest rates.
    
 
      Early withdrawals from your allocation to a Guarantee Period, including
cash withdrawals, transfers, and commencement of an annuity, may be subject to a
Market Value Adjustment, which could decrease or increase the value of your
Account. See "Cash Withdrawals, Withdrawal Charge, and Market Value Adjustment."
 
                             THE ACCUMULATION PHASE
 
   
      During the Accumulation Phase of your Contract, your earnings accumulate
on a tax-deferred basis. The Accumulation Phase begins with our acceptance of
your Purchase Payment and ends the Business Day before your Annuity Commencement
Date. The Accumulation Phase will end sooner if you surrender your Contract or
die before the Annuity Commencement Date.
    
 
ISSUING YOUR CONTRACT
 
   
      When you purchase a Contract, a completed Application and the Purchase
Payment are sent to us for acceptance. When we accept a Group Contract, we issue
the Contract to the Owner; we issue a Certificate to you as a Participant when
we accept your Application.
    
 
   
      We will credit your Purchase Payment to your Account within two business
days of receiving your completed Application. If your Application is not
complete, we will notify you. If we do not have the necessary information to
complete the Application within 5 business days, we will send your money back to
you or ask your permission to retain your Purchase Payment until the Application
is made complete. Then we will apply the Purchase Payment within 2 business days
of when the Application is complete.
    
 
                                       9
<PAGE>
AMOUNT AND FREQUENCY OF PURCHASE PAYMENTS
 
   
      The amount of your Purchase Payment may vary; however, we will not accept
a Purchase Payment of less than $5,000, unless we waive this limit. In addition,
we will not accept a Purchase Payment over $1 million, unless we have approved
the Payment in advance.
    
 
ALLOCATION OF NET PURCHASE PAYMENTS
 
   
      You may allocate your Purchase Payment among the different Sub-Accounts
and Guarantee Periods we offer. At any time, you may have amounts allocated
among up to 18 of the available options.
    
 
   
      In your Application, you may specify the percentage of the Purchase
Payment to be allocated to each Sub-Account or Guarantee Period.
    
 
   
      Although it is currently not our practice, we may deduct applicable
premium or similar taxes from your Purchase Payment. See "Contract Charges --
Premium Taxes." In that case, we will credit your Net Purchase Payment, which is
the Purchase Payment minus the amount of those taxes.
    
 
YOUR ACCOUNT
 
   
      When we accept your Purchase Payment, we establish an Account for you,
which we maintain throughout the Accumulation Phase of your Contract.
    
 
YOUR ACCOUNT VALUE
 
      Your Account Value is the sum of the value of the two components of your
Contract: the Variable Account portion of your Contract ("Variable Account
Value") and the Fixed Account portion of your Contract ("Fixed Account Value").
These two components are calculated separately, as described below.
 
VARIABLE ACCOUNT VALUE
 
      VARIABLE ACCUMULATION UNITS
 
      In order to calculate your Variable Account Value, we use a measure called
a Variable Accumulation Unit for each Sub-Account. Your Variable Account Value
is the sum of your Account Value in each Sub-Account, which is the number of
your Variable Accumulation Units for that Sub-Account times the value of each
Unit.
 
      VARIABLE ACCUMULATION UNIT VALUE
 
      The value of each Variable Accumulation Unit in a Sub-Account reflects the
net investment performance of that Sub-Account. We determine that value once on
each day that the New York Stock Exchange is open for trading (a "Business
Day"), at the close of trading, which is currently 4:00 p.m., Eastern Time. The
period that begins at the time Variable Accumulation Units are valued on a
Business Day and ends at that time on the next Business Day is called a
Valuation Period. On days other than Business Days, the value of a Variable
Accumulation Unit does not change.
 
      To measure these values, we use a factor -- which we call the Net
Investment Factor-- which represents the net return on the Sub-Account's assets.
At the end of any Valuation Period, the value of a Variable Accumulation Unit
for a Sub-Account is equal to the value of that Sub-Account's Variable
Accumulation Units at the end of the previous Valuation Period, multiplied by
the Net Investment Factor. We calculate the Net Investment Factor by dividing
(1) the net asset value of a Series share held in the Sub-Account at the end of
that Valuation Period, plus the per share amount of any dividend or capital
gains distribution made by that Series during the Valuation Period, by (2) the
net asset value per share of the Series share at the end of the previous
Valuation Period; we then deduct a factor representing the mortality and expense
risk charge and administrative expense charge. See "Contract Charges."
 
                                       10
<PAGE>
      For a hypothetical example of how we calculate the value of a Variable
Accumulation Unit, see the Statement of Additional Information.
 
      CREDITING AND CANCELING VARIABLE ACCUMULATION UNITS
 
   
      When we receive an allocation to a Sub-Account, either from the Net
Purchase Payment or a transfer of Account Value, we credit that amount to your
Account in Variable Accumulation Units. Similarly, we cancel Variable
Accumulation Units when you transfer or withdraw amounts from a Sub-Account, or
when we deduct certain charges under the Contract. We determine the number of
Units credited or canceled by dividing the dollar amount by the Variable
Accumulation Unit value for that Sub-Account at the end of the Valuation Period
during which the transaction or charge is effective.
    
 
FIXED ACCOUNT VALUE
 
   
      Your Fixed Account value is the sum of all amounts allocated to Guarantee
Periods, either from a Net Purchase Payment, transfer or renewals, plus interest
credited on those amounts, and minus withdrawals, transfers out of Guarantee
Periods, and any deductions for charges under the Contract taken from your Fixed
Account Value.
    
 
      CREDITING INTEREST
 
      We credit interest on amounts allocated to a Guarantee Period at the
applicable Guaranteed Interest Rate for the duration of the Guarantee Period.
The Guarantee Period begins the day we apply your allocation and ends when the
number of calendar years (or months if the Guarantee Period is less than one
year) in the Guarantee Period (measured from the end of the calendar month in
which the amount was allocated to the Guarantee Period) have elapsed. The last
day of the Guarantee Period is its Expiration Date. During the Guarantee Period,
we credit interest daily at a rate that yields the Guaranteed Interest Rate on
an annual effective basis.
 
      GUARANTEE AMOUNTS
 
      Each separate allocation you make to a Guarantee Period, together with
interest credited thereon, is called a Guarantee Amount. Each Guarantee Amount
is treated separately for purposes of determining the Market Value Adjustment.
 
      RENEWALS
 
      We will notify you in writing between 45 and 75 days before the Expiration
Date for any Guarantee Amount. A new Guarantee Period of the same duration will
begin automatically for that Guarantee Amount on the first day following the
Expiration Date, unless before the Expiration Date we receive (1) written notice
from you electing a different Guarantee Period from among those we then offer or
(2) instructions to transfer all or some of the Guarantee Amount to one or more
Sub-Accounts, in accordance with the transfer privilege provisions of the
Contract. Each new allocation to a Guarantee Period must be at least $1,000.
 
      EARLY WITHDRAWALS
 
      If you withdraw, transfer, or annuitize an allocation to a Guarantee
Period before the Expiration Date, we will apply a Market Value Adjustment to
the transaction. This could result in an increase or decrease of your Account
Value, depending on interest rates at the time. You bear the risk that you will
receive less than your principal if the Market Value Adjustment applies.
 
TRANSFER PRIVILEGE
 
      PERMITTED TRANSFERS
 
      During the Accumulation Phase, you may transfer all or part of your
Account Value to one or more Sub-Accounts or Guarantee Periods then available,
subject to the following restrictions:
 
                                       11
<PAGE>
      -  you may not make more than 12 transfers in any Account Year;
 
      -  the amount transferred from a Sub-Account must be at least $1,000
         unless you are transferring your entire balance in that Sub-Account;
 
   
      -  your Account Value remaining in a Sub-Account must be at least $100;
    
 
   
      -  the amount transferred from a Guarantee Period must be the entire
         Guarantee Amount, except for transfers of interest credited during the
         current Account Year;
    
 
      -  at least 30 days must elapse between transfers to or from Guarantee
         Periods;
 
      -  transfers to or from Sub-Accounts are subject to terms and conditions
         that may be imposed by the Series Fund; and
 
      -  we impose additional restrictions on market timers, which are further
         described below.
 
   
      Transfers out of a Guarantee Period more than 30 days before expiration of
the period will be subject to the Market Value Adjustment described below. Under
current law there is no tax liability for transfers.
    
 
      REQUESTS FOR TRANSFERS
 
      You may request transfers in writing or by telephone. The telephone
transfer privilege is available automatically, and does not require your written
election. We will require personal identifying information to process a request
for transfer made by telephone. We will not be liable for following instructions
communicated by telephone that we reasonably believe are genuine.
 
      If we receive your transfer request before 4:00 p.m. Eastern Time on a
Business Day, it will be effective that day. Otherwise, it will be effective the
next Business Day.
 
      MARKET TIMERS
 
      The Contracts are not designed for professional market timing
organizations or other entities using programmed and frequent transfers. If you
wish to employ such strategies, you should not purchase a Contract. Accordingly,
transfers may be subject to restrictions if exercised by a market timing firm or
any other third party authorized to initiate transfer transactions on behalf of
multiple Participants. In imposing such restrictions, we may, among other
things, not accept (1) the transfer instructions of any agent acting under a
power of attorney on behalf of more than one Participant, or (2) the transfer
instructions of individual Participants who have executed preauthorized transfer
forms that are submitted at the same time by market timing firms or other third
parties on behalf of more than one Participant. We will not impose these
restrictions unless our actions are reasonably intended to prevent the use of
such transfers in a manner that will disadvantage or potentially impair the
Contract rights of other Participants.
 
   
      In addition, the Series Fund has reserved the right to temporarily or
permanently refuse exchange requests from the Variable Account if, in MFS'
judgment, a Series would be unable to invest effectively in accordance with its
investment objective and policies, or would otherwise potentially be adversely
affected. In particular, a pattern of exchanges that coincide with a market
timing strategy may be disruptive to a Series and therefore may be refused.
Accordingly, the Variable Account may not be in a position to effectuate
transfers and may refuse transfer requests without prior notice. We also reserve
the right, for similar reasons, to refuse or delay exchange requests involving
transfers to or from the Fixed Account.
    
 
           WITHDRAWALS, WITHDRAWAL CHARGE AND MARKET VALUE ADJUSTMENT
 
CASH WITHDRAWALS
 
      REQUESTING A WITHDRAWAL
 
      At any time during the Accumulation Phase you may withdraw in cash all or
any portion of your Account Value. To make a withdrawal, you must send us a
written request at our Annuity Service
 
                                       12
<PAGE>
Mailing Address. Your request must specify whether you want to withdraw the
entire amount of your Account or, if less, the amount you wish to withdraw.
 
      All withdrawals may be subject to a withdrawal charge (see "Withdrawal
Charge" below) and withdrawals from your Fixed Account Value also may be subject
to a Market Value Adjustment (see "Market Value Adjustment" below). Upon request
we will notify you of the amount we would pay in the event of a full or partial
withdrawal. Withdrawals also may have adverse federal income tax consequences,
including a 10% penalty tax. See "Federal Tax Status." You should carefully
consider these tax consequences before requesting a cash withdrawal.
 
      FULL WITHDRAWALS
 
      If you request a full withdrawal, we calculate the amount we will pay you
as follows. We start with the total value of your Account at the end of the
Valuation Period during which we receive your withdrawal request; we deduct the
Account Fee for the Account Year in which the withdrawal is made; we add or
subtract the amount of any Market Value Adjustment applicable to your Fixed
Account Value; and finally, we deduct any applicable withdrawal charge.
 
      A full withdrawal results in the surrender of your Contract, and
cancellation of all rights and privileges under your Contract.
 
      PARTIAL WITHDRAWALS
 
      If you request a partial withdrawal we will pay you the actual amount
specified in your request and then reduce the value of your Account by deducting
the amount paid, adding or deducting any Market Value Adjustment applicable to
amounts withdrawn from the Fixed Account, and deducting any applicable
withdrawal charge.
 
      You may specify the amount you want withdrawn from each Sub-Account and/or
Guarantee Amount to which your Account is allocated. If you do not so specify,
we will deduct the total amount you request pro rata, based on your allocations
at the end of the Valuation Period during which we receive your request.
 
      If you request a partial withdrawal that would result in your Account
Value being reduced to an amount less than the Account Fee for the Account Year
in which you make the withdrawal, we will treat it as a request for a full
withdrawal.
 
      TIME OF PAYMENT
 
   
      We will pay you the applicable amount of any full or partial withdrawal
within 7 days after we receive your withdrawal request, except in cases where we
are permitted to defer payment under the Investment Company Act of 1940 and
applicable state insurance law. Currently, we may defer payment of amounts you
withdraw from the Variable Account only for the following periods:
    
 
   
      -  when the New York Stock Exchange is closed (except weekends and
         holidays) or when trading on the New York Stock Exchange is restricted;
    
 
      -  when it is not reasonably practical to dispose of securities held by
         the Series Fund or to determine the value of the net assets of the
         Series Fund, because an emergency exists; or
 
      -  when an SEC order permits us to defer payment for the protection of
         Participants.
 
We also may defer payment of amounts you withdraw from the Fixed Account for up
to 6 months from the date we receive your withdrawal request. We do not pay
interest on the amount of any payments we defer.
 
      WITHDRAWAL RESTRICTIONS FOR QUALIFIED PLANS
 
      If yours is a Qualified Contract, you should carefully check the terms of
the plan for limitations and restrictions on cash withdrawals.
 
                                       13
<PAGE>
      Special restrictions apply to withdrawals from Contracts used for Section
403(b) annuities. See "Federal Tax Status -- Tax-Sheltered Annuities."
 
WITHDRAWAL CHARGE
 
   
      We do not deduct any sales charge from your Purchase Payment when it is
made. However, we may impose a withdrawal charge (known as a "contingent
deferred sales charge") during the first 7 Contract Years on certain amounts you
withdraw. We impose this charge to defray some of our expenses related to the
sale of the Contracts, such as commissions we pay to agents, the cost of sales
literature, and other promotional costs and transaction expenses.
    
 
      FREE WITHDRAWAL AMOUNT
 
   
      During the first 7 Account Years, you may withdraw a portion of your
Account Value -- which we call the "free withdrawal amount" -- before incurring
the withdrawal charge. For any year, the free withdrawal amount is equal to 10%
of your Purchase Payment. Any portion of the free withdrawal amount that you do
not use in an Account Year is non-cumulative.
    
 
   
      APPLICATION OF WITHDRAWAL CHARGE
    
 
   
      If you withdraw more than the free withdrawal amount during the first 7
Account Years, the following withdrawal charge percentage will be applied based
on the Account Year of your withdrawal:
    
 
   
<TABLE>
<CAPTION>
ACCOUNT YEAR      WITHDRAWAL CHARGE
- -------------  -----------------------
<S>            <C>
           1                 6%
           2                 6%
           3                 5%
           4                 5%
           5                 4%
           6                 4%
           7                 3%
   8 or more                 0%
</TABLE>
    
 
   
      In no event shall the aggregate withdrawal charges together with any other
Contract Charges exceed 9% of your Purchase Payment.
    
 
      TYPES OF WITHDRAWALS NOT SUBJECT TO WITHDRAWAL CHARGE
 
   
      We do not impose a withdrawal charge after the seventh Account Year.
    
 
   
      We do not impose a withdrawal charge on withdrawals from the Accounts of
(a) our employees, (b) employees of our affiliates, or (c) licensed insurance
agents who sell the Contracts.
    
 
      We do not impose the withdrawal charge on amounts you apply to provide an
annuity, amounts we pay as a death benefit, or amounts you transfer among the
Sub-Accounts, between the Sub-Accounts and the Fixed Account, or within the
Fixed Account.
 
MARKET VALUE ADJUSTMENT
 
   
      We will apply a market value adjustment if you withdraw or transfer
amounts from your Fixed Account Value more than 30 days before the end of the
applicable Guarantee Period. For this purpose, using Fixed Account Value to
provide an annuity is considered a withdrawal, and the Market Value Adjustment
will apply.
    
 
   
      We apply the Market Value Adjustment separately to each Guarantee Amount
in the Fixed Account, that is to each separate allocation you have made to a
Guarantee Period together with interest credited on that allocation.
    
 
                                       14
<PAGE>
   
      A Market Value Adjustment may decrease, increase or have no effect on your
Account Value. This will depend on changes in interest rates since you made your
allocation to the Guarantee Period and the length of time remaining in the
Guarantee Period. If your Guaranteed Interest Rate is more than 0.50% higher
than the Guaranteed Interest Rate we currently declare for Guarantee Periods
equal to the balance of your Guarantee Period, the Market Value Adjustment will
increase your Account Value. Otherwise, the Market Value Adjustment will
decrease your Account Value.
    
 
      We determine the amount of the Market Value Adjustment by multiplying the
amount that is subject to the adjustment by the following formula:
 
   
<TABLE>
 <S>                                 <C>
                                       N/12
                      1 + I
                    ( ----------     )      -1
                      1 + J + .005
</TABLE>
    
 
where:
 
      I is the Guaranteed Interest Rate applicable to the Guarantee Amount from
which you withdraw, transfer or annuitize;
 
   
      J is the Guaranteed Interest Rate we declare at the time of your
withdrawal, transfer or annuitization for Guarantee Periods equal to the length
of time remaining in the Guarantee Period applicable to your Guarantee Amount,
rounded to the next higher number of complete years.
    
 
   
      N is the number of complete months remaining in your Guarantee Period.
    
 
   
      We will apply the Market Value Adjustment to the amount being withdrawn
after deduction of any Account Fee, if applicable, but before we impose any
withdrawal charge on the amount withdrawn.
    
 
   
      For examples of how we calculate the Market Value Adjustment, see Appendix
B.
    
 
                                CONTRACT CHARGES
 
ACCOUNT FEE
 
   
      Each year during the Accumulation Phase of your Contract we will deduct
from your Account an Account Fee to help cover the administrative expenses we
incur related to the issuance of Contracts and the maintenance of Accounts. We
deduct the Account Fee on each Account Anniversary, which is the anniversary of
the first day of the month after we issue your Contract. The Account Fee is
equal to the lesser of (a) $30 and (b) 2% of your Account Value. We deduct the
Account Fee pro rata from each Sub-Account and each Guarantee Amount, based on
the allocation of your Account Value on your Account Anniversary.
    
 
   
      If you make a full withdrawal of your Account, we will deduct the full
amount of the Account Fee at the time of the withdrawal. In addition, on the
Annuity Commencement Date we will deduct a pro rata portion of the Account Fee
to reflect the time elapsed between the last Account Anniversary and the day
before the Annuity Commencement Date.
    
 
   
      After the Annuity Commencement Date, we will deduct an annual Account Fee
of $30 in the aggregate in equal amounts from each Variable Annuity payment we
make during the year.
    
 
ADMINISTRATIVE EXPENSE CHARGE
 
   
      We deduct an administrative expense charge from the assets of the Variable
Account at an annual effective rate equal to 0.15% during both the Accumulation
Phase and the Income Phase. No deduction is made after the seventh Account
Anniversary. This charge is designed to reimburse expenses we incur in
administering the Contracts, the Accounts and the Variable Account that are not
covered by the Account Fee.
    
 
MORTALITY AND EXPENSE RISK CHARGE
 
      We deduct a mortality and expense charge from the assets of the Variable
Account at an effective annual rate equal to 1.25% during both the Accumulation
Phase and the Income Phase. The mortality risk we assume arises from our
contractual obligation to continue to make annuity payments
 
                                       15
<PAGE>
to each Annuitant, regardless of how long the Annuitant lives and regardless of
how long all Annuitants as a group live. This obligation assures each Annuitant
that neither the longevity of fellow Annuitants nor an improvement in life
expectancy generally will have an adverse effect on the amount of any annuity
payment received under the contract. The expense risk we assume is the risk that
the Account Fee and administrative expense charge we assess under the Contracts
may be insufficient to cover the actual total administrative expenses we incur.
If the amount of the charge is insufficient to cover the mortality and expense
risks, we will bear the loss. If the amount of the charge is more than
sufficient to cover the risks, we will make a profit on the charge. We may use
this profit for any proper corporate purpose, including the payment of marketing
and distribution expenses for the Contracts.
 
PREMIUM TAXES
 
   
      Some states and local jurisdictions impose a premium tax on us that is
equal to a specified percentage of the Purchase Payment you make. In many states
there is no premium tax. We believe that the amounts of applicable premium taxes
currently range from 0% to 3.5%. You should consult a tax adviser to find out if
your state imposes a premium tax and the amount of any tax.
    
 
   
      In order to reimburse us for the premium tax we may pay on Purchase
Payments, our policy is to deduct the amount of such taxes from the amount you
apply to provide an annuity at the time of annuitization. However, we reserve
the right to deduct the amount of any applicable tax from your Account at any
time, including at the time you make the Purchase Payment or make a full or
partial withdrawal. We do not make any profit on the deductions we make to
reimburse premium taxes.
    
 
SERIES FUND EXPENSES
 
      There are fees and charges deducted from each Series of the Series Fund.
These fees and expenses are described in the Series Fund's Prospectus and
Statement of Additional Information.
 
MODIFICATION IN THE CASE OF GROUP CONTRACTS
 
      For Group Contracts, we may modify the Account Fee, the administrative
expense charge and the mortality and expense risk charge upon notice to Owners.
However, such modification will apply only with respect to Participant Accounts
established after the effective date of the modification.
 
                                 DEATH BENEFIT
 
   
      If the Annuitant dies during the Accumulation Phase, we will pay a death
benefit to your Beneficiary, using the payment method elected -- a single cash
payment or one of our Annuity Options. (If you have named more than one
Annuitant, the death benefit will be payable after the death of the last
surviving of the Annuitants.) If the Beneficiary is not living on the date of
death, we will pay the death benefit in one sum to you or to your estate if you
are the Annuitant. We do not pay a death benefit if the Annuitant dies during
the Income Phase. However, the Beneficiary will receive any payments provided
under an Annuity Option that is in effect.
    
 
AMOUNT OF DEATH BENEFIT
 
   
      To calculate the amount of your death benefit, we use a "Death Benefit
Date." The Death Benefit Date is the date we receive proof of the Annuitant's
death in an acceptable form ("Due Proof of Death") if you have elected a death
benefit payment method before the Annuitant's death and it remains effective.
Otherwise, the Death Benefit Date is the later of the date we receive Due Proof
of Death or the date we receive the Beneficiary's election of either payment
method. If we do not receive the Beneficiary's election within 60 days after we
receive Due Proof of Death, the Death Benefit Date will be the last day of the
60 day period.
    
 
      The amount of the death benefit is determined as of the Death Benefit
Date.
 
   
      If the Annuitant was 85 or younger on your Contract Date (the date we
accepted your Purchase Payment), the death benefit will be the greatest of the
following amounts:
    
 
                                       16
<PAGE>
      1.  Your Account Value for the Valuation Period during which the Death
          Benefit Date occurs;
 
      2.  The amount we would pay if you had surrendered your entire Account on
          the Death Benefit Date;
 
   
      3.  Your Account Value on the Seven-Year Anniversary immediately before
          the Death Benefit Date, adjusted for partial withdrawals and charges
          made between the Seven-Year Anniversary and the Death Benefit Date;
    
 
   
      4.  Your Purchase Payment less any partial withdrawals.
    
 
   
METHOD OF PAYING DEATH BENEFIT
    
 
      The death benefit may be paid in a single cash payment or as an annuity
(either fixed, variable or a combination), under one or more of our Annuity
Options. We describe the Annuity Options in this Prospectus under "Income Phase
- -- Annuity Provisions."
 
   
      During the Accumulation Phase, you may elect the method of payment for the
death benefit. If no such election is in effect on the date of the Annuitant's
death, the Beneficiary may elect either a single cash payment or an annuity.
These elections are made by sending us a completed election form, which we will
provide. If we do not receive the Beneficiary's election within 60 days after we
receive Due Proof of Death, we will pay the death benefit in a single cash
payment.
    
 
      If we pay the death benefit in the form of an Annuity Option, the
Beneficiary becomes the Annuitant under the terms of that Annuity Option.
 
   
      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").
    
 
SELECTION AND CHANGE OF BENEFICIARY
 
      You select your Beneficiary in your Application. You may change your
Beneficiary at any time by sending us written notice on our required form,
unless you previously made an irrevocable Beneficiary designation. A new
Beneficiary designation is not effective until we record the change.
 
PAYMENT OF DEATH BENEFIT
 
      Payment of the death benefit in cash will be made within 7 days of the
Death Benefit Date, except if we are permitted to defer payment in accordance
with the Investment Company Act of 1940. If an Annuity Option is elected, the
Annuity Commencement Date will be the first day of the second calendar month
following the Death Benefit Date, and your Account will remain in effect until
the Annuity Commencement Date.
 
DUE PROOF OF DEATH
 
      We accept the following as proof of any person's 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 we find satisfactory.
 
                     THE INCOME PHASE -- ANNUITY PROVISIONS
 
      During the Income Phase, we make regular monthly payments to your
Annuitant.
 
      The Income Phase of your Contract begins with the Annuity Commencement
Date. On that date, we apply your Account Value, adjusted as described below,
under the Annuity Option or Options you have selected, and we make the first
payment.
 
                                       17
<PAGE>
      Once the Income Phase begins, no lump sum settlement option or cash
withdrawals are permitted, except pursuant to Annuity Option D, Monthly Payments
for a Specified Period Certain, as described below under the heading "Annuity
Options," and you cannot change the Annuity Option selected. You may request a
full withdrawal before the Annuity Commencement Date, which will be subject to
all charges applicable on withdrawals. See "Cash Withdrawals, Withdrawal Charge
and Market Value Adjustment."
 
SELECTION OF THE ANNUITANT OR CO-ANNUITANT
 
   
      You select the Annuitant in your Application. The Annuitant is the person
who receives payments during the Income Phase and on whose life these payments
are based. In your Contract, the Annuity Options refer to the Annuitant as the
"Payee."
    
 
   
      In a Non-Qualified Contract, if you name someone other than yourself as
Annuitant, you may also select a Co-Annuitant, who will become the new Annuitant
if the original Annuitant dies before the Income Phase. If you have named both
an Annuitant and a Co-Annuitant, you may designate one of them to become the
sole Annuitant as of the Annuity Commencement Date, if both are living at that
time. If you have not made that designation on the 30th day before the Annuity
Commencement Date, and both the Annuitant and the Co-Annuitant are still living,
the Co-Annuitant will become the Annuitant.
    
 
      When an Annuity Option has been selected as the method of paying the death
benefit, the Beneficiary is the Annuitant.
 
SELECTION OF THE ANNUITY COMMENCEMENT DATE
 
      You select the Annuity Commencement Date in your Application. The
following restrictions apply to the date you may select:
 
      -  The earliest possible Annuity Commencement date is the first day of the
         second month following your Contract Date.
 
   
      -  The latest possible Annuity Commencement Date is the first day of the
         month following the Annuitant's 85th birthday or, if there is a
         Co-Annuitant, the 85th birthday of the younger of the Annuitant and
         Co-Annuitant.
    
 
      -  The Annuity Commencement Date must always be the first day of a month.
 
      You may change the Annuity Commencement Date from time to time by sending
us written notice, with the following additional limitations:
 
      -  We must receive your notice at least 30 days before the current Annuity
         Commencement Date.
 
      -  The new Annuity Commencement Date must be at least 30 days after we
         receive the notice.
 
   
      There may be other restrictions on your selection of the Annuity
Commencement Date imposed by your retirement plan or applicable law. For
example, in most situations, current law requires that for a Qualified Contract
certain minimum distributions must commence no later than April 1 following the
year the Annuitant reaches age 70 1/2 (or, for Qualified Contracts other than
IRAs, no later than April 1 following the year the Annuitant retires, if later
than the year the Annuitant reaches age 70 1/2).
    
 
ANNUITY OPTIONS
 
   
      We offer the following Annuity Options for payments during the Income
Phase. Each Annuity Option may be selected for either a Variable Annuity, a
Fixed Annuity, or a combination of both, except that Annuity Option E is
available only for a Fixed Annuity. We may also agree to other settlement
options, in our discretion.
    
 
                                       18
<PAGE>
      ANNUITY OPTION A -- LIFE ANNUITY
 
      We provide monthly payments during the lifetime of the Annuitant. Annuity
payments stop when the Annuitant dies. There is no provision for continuation of
any payments to a Beneficiary.
 
      ANNUITY OPTION B -- LIFE ANNUITY WITH 60, 120, 180 OR 240 MONTHLY PAYMENTS
      CERTAIN
 
   
      We make monthly payments during the lifetime of the Annuitant. In
addition, we guarantee that the Beneficiary will receive monthly payments for
the remainder of the period certain, if the Annuitant dies during that period.
The election of a longer period results in smaller monthly payments. If no
Beneficiary is designated, we pay the discounted value of the remaining payments
in one sum to the Annuitant's estate. The Beneficiary may also elect to receive
the discounted value of the remaining payments in one sum. The discount rate for
a Variable Annuity will be the assumed interest rate of 4%; the discount rate
for a Fixed Annuity will be based on the interest rate we used to determine the
amount of each payment.
    
 
      ANNUITY OPTION C -- JOINT AND SURVIVOR ANNUITY
 
      We make monthly payments during the lifetime of the Annuitant and another
person you designate and during the lifetime of the survivor of the two. We stop
making payments when the last survivor dies. There is no provision for
continuance of any payments to a Beneficiary.
 
   
      * ANNUITY OPTION D -- MONTHLY PAYMENTS FOR A SPECIFIED PERIOD CERTAIN
    
 
   
      We make monthly payments for a specified period of time, as you elect. If
payments under this option are paid on a variable annuity basis, the Annuitant
may elect to receive in one sum the discounted value of the remaining payments,
less any applicable withdrawal charge. The discount rate for a Variable Annuity
will be the assumed interest rate in effect. If the Annuitant dies during the
period selected, the remaining income payments are made as described under
Annuity Option B.
    
 
   
      * ANNUITY OPTION E -- FIXED PAYMENTS
    
 
   
      We hold the portion of your Adjusted Account Value selected for this
option at interest, and make fixed payments in such amounts and at such times as
you and we may agree. We continue making payments until the amount we hold is
exhausted. The final payment will be for the remaining balance and may be less
than the previous installments. We will credit interest yearly on the amount
remaining unpaid at a rate we determine from time to time, but never less than
4% per year (or a higher rate if specified in your Contract) compounded
annually. We may change the rate at any time, but will not reduce it more
frequently than once each calendar year.
    
 
SELECTION OF ANNUITY OPTION
 
      You select one or more of the Annuity Options, which you may change from
time to time during the Accumulation Phase, as long as we receive your selection
or change in writing at least 30 days before the Annuity Commencement Date. If
we have not received your written selection on the 30th day before the Annuity
Commencement Date, you will receive Annuity Option B, for a life annuity with
120 monthly payments certain.
 
      You may specify the proportion of your Adjusted Account Value you wish to
provide a Variable Annuity or a Fixed Annuity. Under a Variable Annuity, the
dollar amount of payments will vary, while under a Fixed Annuity, the dollar
amount of payments will remain the same. If you do not specify a Variable
Annuity or a Fixed Annuity, your Adjusted Account Value will be divided between
Variable Annuities and Fixed Annuities in the same proportions as your Account
Value was divided between the Variable and Fixed Accounts on the Annuity
Commencement Date. You may allocate your Adjusted Account Value applied to a
Variable Annuity among the Sub-Accounts, or we will use your existing
allocations.
 
- ------------------------
 
   
* The election of this Annuity Option may result in the imposition of a penalty
tax.
    
 
                                       19
<PAGE>
      There may be additional limitations on the options you may elect under
your particular retirement plan or applicable law.
 
      REMEMBER THAT THE ANNUITY OPTIONS MAY NOT BE CHANGED ONCE ANNUITY PAYMENTS
BEGIN.
 
AMOUNT OF ANNUITY PAYMENTS
 
      ADJUSTED ACCOUNT VALUE
 
      The Adjusted Account Value is the amount we apply to provide a Variable
Annuity and/or a Fixed Annuity. We calculate Adjusted Account Value by taking
your Account Value on the Business Day just before the Annuity Commencement Date
and making the following adjustments:
 
      -  We deduct a proportional amount of the Account Fee, based on the
         fraction of the current Account Year that has elapsed;
 
      -  If applicable, we apply the Market Value Adjustment to your Account
         Value in the Fixed Account, which may result in a deduction, an
         addition, or no change; and
 
      -  We deduct any applicable premium tax or similar tax if not previously
         deducted.
 
      VARIABLE ANNUITY PAYMENTS
 
   
      Variable Annuity payments may vary each month. We determine the dollar
amount of the first payment using the portion of your Adjusted Account Value
applied to a Variable Annuity and the Annuity Payment Rates in your Contract,
which are based on an assumed interest rate of 4% per year, compounded annually.
See "Annuity Payment Rates."
    
 
      To calculate the remaining payments, we convert the amount of the first
payment into Annuity Units for each Sub-Account; we determine the number of
those Annuity Units by dividing the portion of the first payment attributable to
the Sub-Account by the Annuity Unit Value of that Sub-Account for the Valuation
Period ending just before the Annuity Commencement Date. This number of Annuity
Units for each Sub-Account will remain constant (unless the Annuitant requests
an exchange of Annuity Units). However, the dollar amount of the next Variable
Annuity payment -- which is the sum of the number of Annuity Units for each
Sub-Account times its Annuity Unit Value for the Valuation Period ending just
before the date of the payment -- will increase, decrease, or remain the same,
depending on the net investment return of the Sub-Accounts.
 
   
      If the net investment return of the Sub-Accounts selected is the same as
the assumed interest rate of 4%, compounded annually, the payments will remain
level. If the net investment return exceeds the assumed interest rate, payments
will increase and, conversely, if it is less than the assumed interest rate,
payments will decrease.
    
 
      Please refer to the Statement of Additional Information for more
information about calculating Variable Annuity Units and Variable Annuity
payments, including examples of these calculations.
 
      FIXED ANNUITY PAYMENTS
 
   
      Fixed Annuity payments are the same each month. We determine the dollar
amount of each Fixed Annuity payment using the fixed portion of your Adjusted
Account Value and the applicable Annuity Payment Rates. These will be either (1)
the rates in your Contract, which are based on a minimum guaranteed interest
rate of 4% per year, compounded annually, or (2) new rates we have published and
are using on the Annuity Commencement Date, if they are more favorable. See
"Annuity Payment Rates."
    
 
      MINIMUM PAYMENTS
 
      If your Adjusted Account Value is less than $2,000, or the first annuity
payment for any Annuity Option is less than $20, we will pay the Adjusted
Account Value to the Annuitant in one payment.
 
                                       20
<PAGE>
EXCHANGE OF VARIABLE ANNUITY UNITS
 
      During the Income Phase, the Annuitant may exchange Annuity Units from one
Sub-Account to another, up to 12 times each Account Year. To make an exchange,
the Annuitant sends us, at our Annuity Service Mailing Address, a written
request stating the number of Annuity Units in the Sub-Account he or she wishes
to exchange and the new Sub-Account for which Annuity Units are requested. The
number of new Annuity Units will be calculated so the dollar amount of an
annuity payment on the date of the exchange would not be affected. To calculate
this number, we use Annuity Unit values for the Valuation Period during which we
receive the exchange request.
 
      We permit only exchanges among Sub-Accounts. No exchanges to or from a
Fixed Annuity are permitted.
 
ACCOUNT FEE
 
   
      During the Income Phase, we deduct the annual Account Fee of $30 in equal
amounts from each Variable Annuity Payment.
    
 
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 specified in the applicable Contract (at least 4% per
year, compounded annually); and (b) the monthly Fixed Annuity payment, when this
payment is based on the minimum guaranteed interest rate specified in the
Contract (at least 4% per year, compounded annually). We may change these rates
under Group Contracts for Accounts established after the effective date of such
change (See "Other Contract Provisions -- Modification").
    
 
      The Annuity Payment Rates may vary according to the Annuity Option elected
and the adjusted age of the Annuitant. The Contract also describes the method of
determining the adjusted age of the Annuitant. The mortality table used in
determining the Annuity Payment Rates for Options A, B and C is the 1983
Individual Annuitant Mortality Table.
 
ANNUITY OPTIONS AS METHOD OF PAYMENT FOR DEATH BENEFIT
 
   
      You or your Beneficiary may also select one or more Annuity Options to be
used in the event of the Annuitant's death before the Income Phase, as described
under the "Death Benefit" section of this Prospectus. In that case, your
Beneficiary will be the Annuitant. The Annuity Commencement Date will be the
first day of the second month beginning after the Death Benefit Date.
    
 
                           OTHER CONTRACT PROVISIONS
 
EXERCISE OF CONTRACT RIGHTS
 
   
      A Group Contract belongs to the Owner. In the case of a Group Contract,
the Owner may expressly reserve all Contract rights and privileges; otherwise,
each Participant will be entitled to exercise such rights and privileges. 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 Participant before the Annuity Commencement Date, except as the Contract
otherwise provides.
    
 
   
      The Annuitant becomes the Payee on and after the Annuity Commencement
Date. The Beneficiary becomes the Payee on the death of the Annuitant after the
Annuity Commencement Date. Such Payee may thereafter exercise such rights and
privileges, if any, of ownership which continue.
    
 
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
 
                                       21
<PAGE>
   
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 or custodian of an individual retirement account plan
qualified under Section 408 of the Internal Revenue Code for the benefit of the
Participants under a Group Contract; 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 the Annuitant and prior to the Annuity
Commencement Date; and each Participant, in like manner, may change the
ownership interest in a Contract. A change of ownership will not be binding on
us until we receive written notification. When we receive such notification, 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 us on account of any payment we make or any action we take
before receiving the change. If you change the Owner of a Non-Qualified
Contract, you will become immediately liable for the payment of taxes on any
gain realized under the Contract prior to the change of ownership, including
possible liability for a 10% federal excise tax.
    
 
   
DEATH OF PARTICIPANT
    
 
   
      If your Contract is a Non-Qualified Contract and you die prior to the
Annuitant and before the Annuity Commencement Date, special distribution rules
apply. In that case, your Account Value, plus or minus any Market Value
Adjustment, must be distributed to your "designated beneficiary" within the
meaning of Section 72(s) of the Internal Revenue Code, either (1) as a lump sum
within 5 years after your death or (2) if in the form of an annuity, over a
period not greater than the life or expected life of the designated beneficiary,
with payments beginning no later than one year after your death.
    
 
   
      The person you have named a Beneficiary under your Contract, if any, will
be the "designated beneficiary." If the named Beneficiary is not living, the
Annuitant automatically becomes the designated beneficiary.
    
 
   
      If the designated beneficiary is your surviving spouse, your spouse may
continue the Contract in his or her own name as Participant. If you were the
Annuitant as well as the Participant, your surviving spouse (if the designated
beneficiary) may elect to be named as both Participant and Annuitant and
continue the Contract; in that case, we will not pay a death benefit and the
Account Value will not be increased to reflect the death benefit calculation. In
all other cases where you are the Annuitant, the death benefit provisions of the
Contract control, subject to the condition that any annuity option elected
complies with the special distribution requirements described above.
    
 
   
      If your spouse elects to continue the Contract (either in the case where
you are the Annuitant or in he case where you are not the Annuitant), your
spouse must give us written notification within 60 days after we receive Due
Proof of Death, and the special distribution rules described above will apply on
the death of your spouse.
    
 
   
      If you are the Annuitant and you die during the Income Phase, the
remaining value of the Annuity Option in place must be distributed at least as
rapidly as the method of distribution under that option.
    
 
   
      If the Participant is not a natural person, these distribution rules apply
on a change in, or the death of, any Annuitant or Co-Annuitant.
    
 
   
      Payments made in contravention of these special rules would adversely
affect the treatment of the Contracts as annuity contracts under the Internal
Revenue code. Neither you nor the Beneficiary may exercise rights that would
have that effect.
    
 
   
      If yours is a Qualified Contract, any distributions upon your death 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.
    
 
                                       22
<PAGE>
VOTING OF SERIES FUND SHARES
 
      We will vote Series Fund shares held by the Sub-Accounts at meetings of
shareholders of the Series Fund or in connection with similar solicitations, but
will follow voting instructions received from persons having the right to give
voting instructions. During the Accumulation Phase, you will have the right to
give voting instructions, except in the case of a Group Contract where the Owner
has reserved this right. During the Income Phase, the Payee -- that is the
Annuitant or Beneficiary entitled to receive benefits -- is the person having
such voting rights. We will vote any shares attributable to us and Series Fund
shares for which no timely voting instructions are received in the same
proportion as the shares for which we receive instructions from Owners,
Participants and Payees, as applicable.
 
      Owners of Qualified Contracts issued on a group basis may be subject to
other voting provisions of the particular plan and of the Investment Company Act
of 1940. Employees who contribute to plans that are funded by the Contracts may
be entitled to instruct the Owners as to how to instruct us 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 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, or any duty to inquire as to the instructions received or the
authority of Owners, Participants or others, as applicable, 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 under Group
Contracts 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 Series 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 10 days prior to each meeting of the
shareholders of the Series Fund. We will determine the number of Series Fund
shares as to which each such person is entitled to give instructions as of the
record date set by the Series Fund for such meeting, which is expected to be 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
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 we will send you, 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 your
Account and the Fixed Accumulation Value of your Account, which statement shall
be accurate as of a date not more than 2 months previous to the date of mailing.
These periodic statements contain important information concerning your
transactions with respect to a Contract. It is your obligation to review each
such statement carefully and to report to us, at the address or telephone number
provided on the statement, any errors or discrepancies in the information
presented therein within 60 days of the date of such statement. Unless we
receive notice of any such error or discrepancy from you within such period, we
may not be responsible for correcting the error or discrepancy.
 
      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
 
                                       23
<PAGE>
1940 and the Securities Act of 1933. We will also send such statements
reflecting transactions in your Account as may be required by applicable laws,
rules and regulations.
 
      Upon request, we will provide you with information regarding fixed and
variable accumulation values.
 
SUBSTITUTION OF SECURITIES
 
      Shares of any or all Series of the Series Fund may not always be available
for investment under the Contract. We may add or delete Series or other
investment companies as variable investment options under the Contracts. We may
also substitute for the shares held in any Sub-Account shares of another Series
or shares of another registered open-end investment company or unit investment
trust, provided that the substitution has been approved , if required, by the
SEC. In the event of any substitution pursuant to this provision, we may make
appropriate endorsement to the Contract to reflect the substitution.
 
CHANGE IN OPERATION OF VARIABLE ACCOUNT
 
      At our 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 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 SEC.
In the event of any change in the operation of the Variable Account pursuant to
this provision, we 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
 
      We reserve 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
Income Phase), we 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; (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; (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"); (iv) provides additional Variable
Account and/or fixed accumulation options; or (v) as may otherwise be in the
best interests of Owners, Participants, or Payees, as applicable. In the event
of any such modification, we may make appropriate endorsement in the Contract to
reflect such modification.
    
 
      In addition, upon notice to the Owner, we may modify a Group Contract to
change the withdrawal charges, Account Fees, mortality and expense risk charges,
administrative 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
applies only to Participant Accounts established after the effective date of
such modification. In order to exercise our modification rights in these
particular instances, we 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 we mail notice of modification. All of the
charges and the annuity tables which are provided in the Group Contract prior to
any such modification will remain in effect permanently, unless improved by the
Company, with respect to Participant Accounts established prior to the effective
date of such modification.
 
                                       24
<PAGE>
DISCONTINUANCE OF NEW PARTICIPANTS
 
      We may limit or discontinue the acceptance of new Applications and the
issuance of new Certificates under a Group Contract by giving 30 days prior
written notice to the Owner. This will not affect rights or benefits with
respect to any Participant Accounts established under such Group Contract prior
to the effective date of such limitation or discontinuance.
 
RESERVATION OF RIGHTS
 
      We reserve the right, to the extent permitted by law, to: (1) combine any
2 or more variable accounts; (2) add or delete Series, sub-series thereof or
other investment companies and corresponding Sub-Accounts; (3) add or remove
Guarantee Periods available at any time for election by a Participant; and (4)
restrict or eliminate any of the voting rights of Participants (or Owners) or
other persons who have voting rights as to the Variable Account. Where required
by law, we will obtain approval of changes from Participants or any appropriate
regulatory authority. In the event of any change pursuant to this provision, we
may make appropriate endorsement to the Contract to reflect the change.
 
RIGHT TO RETURN
 
      If you are not satisfied with your Contract, you may return it by mailing
or delivering it to us at the Annuity Service Mailing Address on the cover of
this Prospectus within 10 days after it was delivered to you. When we receive
the returned Contract, it will be cancelled and we will refund to you your
Account Value at the end of the Valuation Period during which we received it.
However, if applicable state law requires, we will return the full amount of any
Purchase Payment(s) we received. State law may also require us to give you a
longer "free look" period or allow you to return the Contract to your sales
representative.
 
      If you are establishing an Individual Retirement Account ("IRA"), the
Internal Revenue Code requires that we give you a disclosure statement
containing certain information about the Contract and applicable legal
requirements. We must give you this statement on or before the date the IRA is
established. If we give you the disclosure statement before the seventh day
preceding the date the IRA is established, you will not have any right of
revocation under the Code. If we give you the disclosure statement at a later
date, then you may give us a notice of revocation at any time within 7 days
after your Contract Date. Upon such revocation, we will refund your Purchase
Payment(s). This right of revocation with respect to an IRA is in addition to
the return privilege set forth in the preceding paragraph. We allow a
Participant establishing an IRA a "ten day free-look," notwithstanding the
provisions of the Internal Revenue Code.
 
                               FEDERAL TAX STATUS
 
INTRODUCTION
 
      This section describes general federal income tax consequences based upon
our understanding of current federal tax laws. Actual federal tax consequences
may vary depending on, among other things, the type of retirement plan with
which you use a Contract and whether (depending on the site of Contract
issuance) Puerto Rico tax law applies. Also, Congress has the power to enact
legislation affecting the tax treatment of annuity contracts, and such
legislation could apply retroactively to Contracts that you purchased before the
date of enactment. We do not make any guarantee regarding the federal, state, or
local tax status of any Contract or any transaction involving any Contract. You
should consult a qualified tax professional for advice before purchasing a
Contract or executing any other transaction (such as a rollover, distribution,
withdrawal or payment) involving a Contract.
 
DEDUCTIBILITY OF PURCHASE PAYMENTS
 
      For federal income tax purposes, Purchase Payments made under
Non-Qualified Contracts are not deductible.
 
                                       25
<PAGE>
PRE-DISTRIBUTION TAXATION OF CONTRACTS
 
      Generally, an increase in the value of a Contract will not give rise to
tax, prior to distribution.
 
      However, corporate (or other non-natural person) Owners of, and
Participants under, a Non-Qualified Contract incur current tax, regardless of
distribution, on Contract value increases. Such current taxation does not apply,
though, to (i) immediate annuities, which the Internal Revenue Code (the "Code")
defines as a single premium contract with an annuity commencement date within
one year of the date of purchase, or (ii) any Contract that the non-natural
person holds as agent for a natural person (such as where a bank or other entity
holds a Contract as trustee under a trust agreement).
 
      The Internal Revenue Service could assert that Owners or Participants
under both Qualified Contracts and Non-Qualified Contracts annually receive a
taxable deemed distribution equal to the cost of any life insurance benefit
under the Contract.
 
   
      You should note that qualified retirement investments automatically
provide tax deferral regardless of whether the underlying contract is an
annuity.
    
 
DISTRIBUTIONS AND WITHDRAWALS FROM NON-QUALIFIED CONTRACTS
 
      The Account Value will include an amount attributable to Purchase
Payments, the return of which is not taxable, and an amount attributable to
investment earnings, the return of which is taxable at ordinary income rates.
The relative portions of a distribution that derive from nontaxable Purchase
Payments and taxable investment earnings depend upon the timing of the
distribution.
 
   
      If you withdraw less than your entire Account Value under a Non-Qualified
Contract before the Annuity Commencement Date, you must treat the withdrawal
first as a return of investment earnings. You may treat only withdrawals in
excess of the amount of the Account Value attributable to investment earnings as
a return of Purchase Payments. Account Value amounts assigned or pledged as
collateral for a loan will be treated as if withdrawn from the Contract.
    
 
      If a Payee receives annuity payments under a Non-Qualified Contract after
the Annuity Commencement Date, however, the Payee treats a portion of each
payment as a nontaxable return of Purchase Payments. In general, the nontaxable
portion of such a payment bears the same ratio to the total payment as the
Purchase Payments bear to the Payee's expected return under the Contract. The
remainder of the payment constitutes a taxable return of investment earnings.
Once the Payee has received nontaxable payments in an amount equal to total
Purchase Payments, all future distributions constitute fully taxable ordinary
income. If the Annuitant dies before the Payee recovers the full amount of
Purchase Payments, the Payee may deduct an amount equal to unrecovered Purchase
Payments.
 
      Upon the transfer of a Non-Qualified Contract by gift (other than to the
Participant's spouse), the Participant must treat an amount equal to the Account
Value minus the total amount paid for the Contract as income.
 
      A penalty tax of 10% may apply to taxable cash withdrawals and lump-sum
payments from Non-Qualified Contracts. This penalty will not apply in certain
circumstances, such as distributions pursuant to the death of the Participant or
distributions under an immediate annuity (as defined above), or after age
59 1/2.
 
DISTRIBUTIONS AND WITHDRAWALS FROM QUALIFIED CONTRACTS
 
      Generally, distributions from a Qualified Contract will constitute fully
taxable ordinary income. Also, a 10% penalty tax will, except in certain
circumstances, apply to distributions prior to age 59 1/2.
 
   
      Distributions from a Qualified Contract are not subject to current
taxation or a 10% penalty, however, if:
    
 
      -  the distribution is not a hardship distribution or part of a series of
         payments for life or for a specified period of 10 years or more (an
         "eligible rollover distribution"), and
 
                                       26
<PAGE>
      -  the Participant or Payee rolls over the distribution (with or without
         actually receiving the distribution) into a qualified retirement plan
         eligible to receive the rollover.
 
   
      Only you or your spouse may elect to rollover a distribution to an
eligible retirement plan.
    
 
WITHHOLDING
 
   
      In the case of an eligible rollover distribution (as defined above) from a
Qualified Contract (other than from a Contract issued for use with an individual
retirement account), we (or the plan administrator) must withhold and remit to
the U.S. Government 20% of the distribution, 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; however, only you or
your spouse may elect a direct rollover. In the case of a distribution from (i)
a Non-Qualified Contract, (ii) a Qualified Contract issued for use with an
individual retirement account, or (iii) a Qualified Contract where the
distribution is not an eligible rollover distribution, we will withhold and
remit to the U.S. Government a part of the taxable portion of each distribution
unless, prior to the distribution, the Participant or Payee provides us his or
her taxpayer identification number and instructs us (in the manner prescribed)
not to withhold. The Participant or Payee may credit against his or her federal
income tax liability for the year of distribution any amounts that we (or the
plan administrator) withhold.
    
 
PURCHASE OF IMMEDIATE ANNUITY CONTRACT AND DEFERRED ANNUITY CONTRACT
 
      You should consider the following information only if you intend to
purchase an immediate annuity contract and a deferred annuity contract together.
We understand that the Treasury Department might reconsider the tax treatment of
annuity payments under an immediate annuity contract (as defined above)
purchased together with a deferred annuity contract. We believe that any adverse
change in the existing tax treatment of such immediate annuity contracts would
not apply to contracts issued before the Treasury Department announces the
change. However, there can be no assurance that the Treasury Department will not
apply any such change retroactively.
 
INVESTMENT DIVERSIFICATION AND CONTROL
 
      The Treasury Department has issued regulations that prescribe investment
diversification requirements for mutual fund series underlying nonqualified
variable contracts. Contracts must comply with these regulations to qualify as
annuities for federal income tax purposes. Contracts that do not meet the
guidelines are subject to current taxation on annual increases in value. We
believe that each series of the Series Fund complies with these regulations. The
preamble to the regulations states that the Internal Revenue Service may
promulgate guidelines under which an owner's excessive control over investments
underlying the contract will preclude the contract from qualifying as an annuity
for federal tax purposes. We cannot predict whether such guidelines, if in fact
promulgated, will be retroactive. We will take any action (including
modification of the Contract and/or the Variable Account) necessary to comply
with any retroactive guidelines.
 
TAX TREATMENT OF THE COMPANY AND THE VARIABLE ACCOUNT
 
      As a life insurance company under the Code, we will record and report
operations of the Variable Account separately from other operations. The
Variable Account will not, however, constitute a regulated investment company or
any other type of taxable entity distinct from our other operations. We will not
incur tax on the income of the Variable Account (consisting primarily of
interest, dividends, and net capital gains) if we use this income to increase
reserves under Contracts participating in the Variable Account.
 
QUALIFIED RETIREMENT PLANS
 
      You may use Qualified Contracts with several types of qualified retirement
plans. Because tax consequences will vary with the type of qualified retirement
plan and the plan's specific terms and conditions, we provide below only brief,
general descriptions of the consequences that follow from using Qualified
Contracts in connection with various types of qualified retirement plans. We
stress that
 
                                       27
<PAGE>
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 of the
Qualified Contracts that you are using. These terms and conditions may include
restrictions on, among other things, ownership, transferability, assignability,
contributions and distributions. Owners, Participants, Payees, Beneficiaries and
administrators of qualified retirement plans should consider, with the guidance
of a tax adviser, whether the death benefit payable under the Contract affects
the qualified status of their retirement plan.
 
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. Self-employed persons may therefore use Qualified
Contracts as a funding vehicle for their retirement plans, as a general rule.
 
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. The Code imposes restrictions on cash withdrawals
from Section 403(b) annuities.
 
      If the Contracts are to receive tax deferred treatment, cash withdrawals
of amounts attributable to salary reduction contributions (other than
withdrawals of accumulation account value as of December 31, 1988) 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 (i) any post-1988 salary reduction
contributions, (ii) any growth or interest on post-1988 salary reduction
contributions, and (iii) any growth or interest on pre-1989 salary reduction
contributions that occurs on or after January 1, 1989. It is permissible,
however, to withdraw post-1988 salary reduction contributions in cases of
financial hardship. While the Internal Revenue Service has not issued specific
rules defining financial hardship, we expect 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 Contracts. Under certain circumstances the 10% tax penalty will not
apply if the withdrawal is for medical expenses.
 
      Under the terms of a particular Section 403(b) plan, the Participant may
be entitled to transfer all or a portion of the 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.
 
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, Employer/Association of Employees Established Individual Retirement
Account Trusts, and Simple Retirement Accounts. Such IRAs are subject to
limitations on contribution levels, 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 in an IRA on a tax-deferred
basis. If we sell Contracts for use with IRAs, the Internal Revenue Service or
other agency may impose supplementary information requirements. We will provide
purchasers of the Contracts for such purposes with any necessary information.
You will have the right to revoke the Contract under certain circumstances, as
described in the section of this Prospectus entitled "Right to Return."
 
                                       28
<PAGE>
ROTH IRAS
 
   
      Section 408A of the Code permits an individual to contribute to an
individual retirement program called a Roth IRA. Unlike contributions to a
traditional IRA under Section 408 of the Code, contributions to a Roth IRA are
not tax-deductible. Provided certain conditions are satisfied, distributions are
generally tax-free. Like traditional IRAs, Roth IRAs are subject to limitations
on contribution amounts and the timing of distributions. If an individual
converts a traditional IRA into a Roth IRA, the full amount of the IRA is
included in taxable income. The Internal Revenue Service and other agencies may
impose special information requirements with respect to Roth IRAs. If and when
we make Contracts available for use with Roth IRAs, we will provide any
necessary information.
    
 
                        ADMINISTRATION OF THE CONTRACTS
 
      We perform certain administrative functions relating to the Contracts,
Participant Accounts, and the Variable Account. These functions include, but are
not limited to, maintaining the books and records of the Variable Account and
the Sub-Accounts; maintaining records of the name, address, taxpayer
identification number, Contract number, Participant Account number and type, the
status of each Participant Account and other pertinent information necessary to
the administration and operation of the Contracts; processing Applications,
Purchase Payments, transfers and full and partial withdrawals; issuing Contracts
and Certificates; administering annuity payments; furnishing accounting and
valuation services; reconciling and depositing cash receipts; providing
confirmations; providing toll-free customer service lines; and furnishing
telephonic transfer services.
 
                         DISTRIBUTION OF THE CONTRACTS
 
      We offer the Contracts on a continuous basis. The Contracts are 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"), One Sun Life Executive Park, Wellesley
Hills, Massachusetts 02481. Clarendon, a wholly-owned subsidiary of the Company,
is registered with the SEC under the Securities Exchange Act of 1934 as a
broker-dealer and is a member of the National Association of Securities Dealers,
Inc.
 
   
      Commissions and other distribution compensation will be paid by the
Company to the selling agents 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 promotional incentives, in the form of cash or other
compensation as allowed by law. 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 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, or of immediate family members of such employees or persons.
During 1996, 1997 and 1998, nothing was paid to and retained by Clarendon in
connection with the distribution of the contracts.
    
 
                            PERFORMANCE INFORMATION
 
   
      From time to time the Variable Account may publish reports to
shareholders, sales literature and advertisements containing performance
information relating to the Sub-Accounts. This information may include
standardized and non-standardized "Average Annual Total Return," "Cumulative
Growth Rate" and "Compound Growth Rate." The Government Securities Series
Sub-Account and the High Yield Series Sub-Account may also advertise "yield."
The Money Market Series Sub-Account may advertise "yield" and "effective yield."
    
 
   
      Average Annual Total Return measures the net income of the Sub-Account and
any realized or unrealized gains or losses of the Series in which it invests,
over the period stated. Average Annual Total Return figures are annualized and
represent the average annual percentage change in the value of an investment in
a Sub-Account over that period. Standardized Average Annual Total Return
information
    
 
                                       29
<PAGE>
   
covers the period after the Variable Account was established or, if shorter, the
life of the Series. Non-standardized Average Annual Return covers the life of
each Series, which may predate the Variable Account. Cumulative Growth Rate
represents the cumulative change in the value of an investment in the
Sub-Account for the period stated, and is arrived at by calculating the change
in the Accumulation Unit Value of a Sub-Account between the first and the last
day of the period being measured. The difference is expressed as a percentage of
the Accumulation Unit Value at the beginning of the base period. "Compound
Growth Rate" is an annualized measure, calculated by applying a formula that
determines the level of return which, if earned over the entire period, would
produce the cumulative return.
    
 
      Average Annual Total Return figures assume an initial purchase payment of
$1,000 and reflect all applicable withdrawal and Contract charges. The
Cumulative Growth Rate and Compound Growth Rate figures that we advertise do not
reflect withdrawal charges or the Account Fee, although they reflect all
recurring charges. Results calculated without withdrawal and/or certain Contract
charges will be higher. We may also use other types of rates of return that do
not reflect withdrawal and Contract charges.
 
      The performance figures used by the Variable Account are based on the
actual historical performance of the Series Fund for the specified periods, and
the figures are not intended to indicate future performance. For periods before
the date the Contracts became available, we calculate the performance
information for the Sub-Account on a hypothetical basis. To do this, we reflect
deductions of the current Contract fees and charges from the historical
performance of the corresponding series.
 
      Yield is a measure of the net dividend and interest income earned over a
specific one month or 30-day period (7-day period for the Money Market Series
Sub-Account), expressed as a percentage of the value of the Sub-Account's
Accumulation Units. Yield is an annualized figure, which means that we assume
that the Sub-Account generates the same level of net income over a one-year
period and compound that income on a semi-annual basis. We calculate the
effective yield for the Money Market Series Sub-Account similarly, but include
the increase due to assumed compounding. The Money Market Sub-Account's
effective yield will be slightly higher than its yield as a result of its
compounding effect.
 
      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
information on performance and our computations is set forth in the Statement of
Additional Information.
 
      The Company may also advertise the ratings and other information assigned
to it by independent industry ratings organizations. Some of these organizations
are A.M. Best, Moody's Investor's Service, Standard and Poor's Insurance Rating
Services, and Duff and Phelps. Each year A.M. Best reviews the financial status
of thousands of insurers, culminating in the assignment of Best's rating. These
ratings reflect A.M. Best's current opinion of the relevant financial strength
and operating performance of an insurance company in comparison to the norms of
the life/health industry. Best's ratings range from A++ to F. Standard and
Poor's and Duff and Phelps' ratings measure the ability of an insurance company
to meet its obligations under insurance policies it issues. These two ratings do
not measure the insurance company's ability to meet non-policy obligations.
Ratings in general do not relate to the performance of the Sub-Accounts.
 
      We may also advertise endorsements from organizations, individuals or
other parties that recommend the Company or the Contracts. We may occasionally
include in advertisements (1) comparisons of currently taxable and tax deferred
investment programs, based on selected tax brackets; or (2) discussions of
alternative investment vehicles and general economic conditions.
 
                             AVAILABLE INFORMATION
 
      The Company and the Variable Account have filed with the SEC registration
statements under the Securities Act of 1933 relating to the Contracts. This
Prospectus does not contain all of the
 
                                       30
<PAGE>
information contained in the registration statements and their exhibits. For
further information regarding the Variable Account, the Company and the
Contracts, please refer to the registration statements and their exhibits.
 
      In addition, the Company is subject to the informational requirements of
the Securities Exchange Act of 1934. We file reports and other information with
the SEC to meet these requirements. You can inspect and copy this information
and our registration statements at the SEC's public reference facilities at the
following locations: WASHINGTON, D.C. -- 450 Fifth Street, N.W., Room 1024,
Washington, D.C. 20549; CHICAGO, ILLINOIS -- 500 West Madison Street, Chicago,
IL 60661; NEW YORK, NEW YORK -- 7 World Trade Center, 13th Floor, New York, NY
10048. The Washington, D.C. office will also provide copies by mail for a fee.
You may also find these materials on the SEC's website (http:// www.sec.gov).
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
      The Company's Annual Report on Form 10-K for the year ended December 31,
1998 filed with the SEC is incorporated by reference in this Prospectus. Any
statement contained in a document we incorporate by reference is deemed modified
or superceded to the extent that a later filed document, including this
Prospectus, shall modify or supercede that statement. Any statement so modified
or superceded shall not be deemed, except as so modified or superceded, to
constitute 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 this Prospectus). Requests for
such document should be directed to the Secretary, Sun Life Assurance Company of
Canada (U.S.), One Sun Life Executive Park, Wellesley Hills, Massachusetts
02481, telephone (800) 225-3950.
 
                    ADDITIONAL INFORMATION ABOUT THE COMPANY
 
BUSINESS OF THE COMPANY
 
      We are engaged in the sale of individual variable life insurance and
individual and group fixed and variable annuities. These contracts are sold in
both the tax qualified and non-tax qualified markets. These products are
distributed through individual insurance agents, insurance brokers and
registered broker-dealers.
 
   
      The following table sets forth premiums and deposits by major product
categories for each of the last three years. See notes to financial statements
for industry segment information.
    
 
   
<TABLE>
<CAPTION>
                                      1998          1997          1996
                                  ------------  ------------  ------------
                                               (IN THOUSANDS)
<S>                               <C>           <C>           <C>
Individual insurance products     $    155,907  $    204,670  $    207,845
Retirement products               $  2,194,895  $  2,204,693  $  1,834,327
                                  ------------  ------------  ------------
                                  $  2,350,802  $  2,409,363  $  2,042,172
                                  ------------  ------------  ------------
                                  ------------  ------------  ------------
</TABLE>
    
 
      We have obtained authorization to do business in 48 states, the District
of Columbia and Puerto Rico, and anticipate that we will be authorized to do
business in all states except New York. We have 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. Our other active subsidiaries
are Sun Capital Advisers, Inc., a registered investment adviser, Clarendon
Insurance Agency, Inc., a registered broker-dealer that acts as the general
distributor of the Contracts and other annuity and life insurance contracts that
we and our affiliates issue, Sun Life of Canada (U.S.) Distributors, Inc., a
registered broker-dealer and investment adviser, New London Trust, F.S.B., a
federally chartered savings bank, Sun Life Financial Services Limited, which
provides off-shore administrative services to us and our parent, Sun Life
Assurance
 
                                       31
<PAGE>
Company of Canada ("Sun Life (Canada)"), and Sun Life Information Services
Ireland Limited, an offshore technology center.
 
      We are a wholly-owned subsidiary of Sun Life of Canada (U.S.) Holdings,
Inc. ("Life Holdco"). Life Holdco is a wholly-owned subsidiary of Sun Life
Assurance Company of Canada -- U.S. Operations Holdings, Inc. ("U.S. Holdco").
U.S. Holdco is a wholly-owned subsidiary of 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,
in all U.S. states (except New York), and in the District of Columbia, Puerto
Rico, the Virgin Islands, Great Britain, Ireland, Hong Kong, Bermuda and the
Philippines.
 
   
SELECTED FINANCIAL DATA
    
 
   
      The following selected financial data for the Company should be read in
conjunction with the statutory financial statements of the Company and notes
thereto included in this Prospectus beginning on page 46.
    
 
   
<TABLE>
<CAPTION>
                                                                     FOR THE YEARS ENDED DECEMBER 31
                                                     ---------------------------------------------------------------
                                                        1998         1997         1996         1995         1994
                                                     -----------  -----------  -----------  -----------  -----------
                                                                             (IN THOUSANDS)
 <S>                                                 <C>          <C>          <C>          <C>          <C>
 Revenues
   Premiums, annuity deposits and other revenue      $ 2,581,463  $ 2,623,629  $ 2,215,322  $ 1,883,901  $ 1,997,525
   Net investment income and realized gains              187,208      298,121      310,172      315,966      312,583
                                                     -----------  -----------  -----------  -----------  -----------
                                                       2,768,671    2,921,750    2,525,494    2,199,867    2,310,108
                                                     -----------  -----------  -----------  -----------  -----------
 Benefits and expenses
   Policyholder benefits                               2,416,950    2,579,104    2,232,528    1,995,208    2,102,290
   Other expenses                                        214,607      206,065      175,342      150,937      186,892
                                                     -----------  -----------  -----------  -----------  -----------
                                                       2,631,557    2,785,169    2,407,870    2,146,145    2,289,182
                                                     -----------  -----------  -----------  -----------  -----------
 Operating gain                                          137,114      136,581      117,624       53,722       20,926
 Federal income tax expense (benefit)                     11,713        7,339       (5,400)      17,807       19,469
                                                     -----------  -----------  -----------  -----------  -----------
 Net income                                          $   125,401  $   129,242  $   123,024  $    35,915  $     1,457
                                                     -----------  -----------  -----------  -----------  -----------
                                                     -----------  -----------  -----------  -----------  -----------
 Assets                                              $16,902,621  $15,925,357  $13,621,952  $12,359,683  $10,117,822
                                                     -----------  -----------  -----------  -----------  -----------
                                                     -----------  -----------  -----------  -----------  -----------
 Surplus notes                                       $   565,000  $   565,000  $   315,000  $   650,000  $   335,000
                                                     -----------  -----------  -----------  -----------  -----------
                                                     -----------  -----------  -----------  -----------  -----------
</TABLE>
    
 
   
See Note 1 to financial statements for changes in accounting principles and
reporting.
    
 
   
See discussion in Management's Discussion and Analysis of Financial Conditions
and Results of Operations.
    
 
   
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
OPERATIONS
    
 
   
CAUTIONARY STATEMENT
    
 
   
      This Prospectus includes forward looking statements by the Company under
the Private Securities Litigation Reform Act of 1995. These statements are not
matters of historical fact; they relate to such topics as future product sales,
Year 2000 compliance, volume growth, market share, market risk and financial
goals. It is important to understand that these forward-looking statements are
subject to
    
 
                                       32
<PAGE>
   
certain risks and uncertainties that could cause actual results to differ
materially from those that the statements anticipate. These risks and
uncertainties may concern, among other things:
    
 
   
      -  The Company's ability to identify and address Year 2000 issues
         successfully, in a timely manner, and at reasonable cost. They also may
         concern the ability of the Company's vendors, suppliers, other service
         providers, and customers to successfully address their own Year 2000
         issues in a timely manner.
    
 
   
      -  Heightened competition, particularly in terms of price, product
         features, and distribution capability, which could constrain the
         Company's growth and profitability.
    
 
   
      -  Changes in interest rates and market conditions.
    
 
   
      -  Regulatory and legislative developments.
    
 
   
      -  Developments in consumer preferences and behavior patterns.
    
 
   
RESULTS OF OPERATIONS
    
 
   
NET INCOME
    
 
   
      Net income decreased by $3.8 million to $125.4 million in 1998, reflecting
an increase of $22.5 million in income from operations and a decrease of $26.3
million in net realized capital gains. (In the following discussion, "income
from operations" refers to the statutory statement of operations line item, net
gain from operations after dividends to policyholders and federal income tax and
before realized capital gains.)
    
 
   
      Income from operations increased from $102.5 million in 1997 to $125.0
million in 1998, mainly as a result of the following factors:
    
 
   
      -  A $16.7 million increase, to $31.4 million in 1998, in the income from
         operations from the Company's Retirement Products and Services segment.
         (This is discussed in the "Retirement Products and Services Segment"
         section below.)
    
 
   
      -  The effect of terminating certain reinsurance agreements with the
         Company's ultimate parent. The termination of these agreements was the
         predominant factor in the $71.1 million increase in income from
         operations for the Company's Individual Insurance segment.
    
 
   
      -  The effects of the Company's December 1997 reorganization (described in
         the "Corporate Segment" section below), as a result of which
         Massachusetts Financial Services Company ("MFS") was no longer a
         subsidiary of the Company. As a result of this reorganization,
         dividends from subsidiaries were lower in 1998 than in 1997 and certain
         subsidiary tax benefits were no longer available to the Company. Also
         affecting income from operations for the Corporate segment in 1998 was
         that income earned on the proceeds of a December 1997 issuance of a
         $250 million surplus note was lower than the related interest expense.
    
 
   
      Net realized capital gains decreased from $26.7 million in 1997 to $0.4
million in 1998. This change also reflected the Company's reorganization, as a
result of which the Company had a realized capital gain of $21.2 million in
1997.
    
 
   
      Net income increased by $6.2 million to $129.2 million in 1997, as
compared to 1996 reflecting a decrease of $15.6 million in income from
operations and an increase of $21.8 million in net realized capital gains.
    
 
   
      Income from operations decreased from $118.2 million in 1996 to $102.5
million in 1997, mainly as a result of the following factors:
    
 
   
      -  A $7.6 million decrease, to $14.7 million, in income from operations
         from the Company's Retirement Products and Services segment. (This is
         discussed in the "Retirement Products and Services Segment" section
         below.)
    
 
   
      -  An increase of $6.5 million, compared to 1996, in the effects of the
         reinsurance arrangements between the Company and its ultimate parent.
    
 
                                       33
<PAGE>
   
      -  A decrease, by approximately $9 million, in dividends from
         subsidiaries, as well as higher taxes and expenses in the Corporate
         segment.
    
 
   
      As noted above, the $21.9 million increase in net realized capital gains,
from $4.8 million in 1996 to $26.7 million in 1997, was caused mainly by the
December 1997 Company reorganization, as a result of which the Company had a
realized capital gain of $21.2 million in 1997.
    
 
   
INCOME FROM OPERATIONS BY SEGMENT
    
 
   
      The Company's income from operations reflects the operations of its three
business segments: the Retirement Products and Services segment, the Individual
Insurance segment and the Corporate segment. The following table provides a
summary:
    
 
   
                       Income from Operations by Segment*
                                ($ in millions)
    
 
   
<TABLE>
<CAPTION>
                                                                                                            % CHANGE
                                                                                                  ----------------------------
                                                                   1998       1997       1996       1998/1997      1997/1996
                                                                 ---------  ---------  ---------  -------------  -------------
<S>                                                              <C>        <C>        <C>        <C>            <C>
Individual Insurance                                                  89.1       18.0       11.5       395.0%          56.5%
Retirement Products and Services                                      31.4       14.7       22.3       113.6%         (34.1)%
Corporate                                                              4.5       69.8       84.4       (93.6)%        (17.3)%
                                                                 ---------  ---------  ---------       -----          -----
                                                                     125.0      102.5      118.2        22.0%         (13.3)%
                                                                 ---------  ---------  ---------       -----          -----
                                                                 ---------  ---------  ---------       -----          -----
</TABLE>
    
 
   
*Before realized capital gains
    
 
   
      These results are discussed more fully below.
    
 
   
      RETIREMENT PRODUCTS AND SERVICES SEGMENT
    
 
   
      The Retirement Products and Services segment focuses on the savings and
retirement needs of those preparing for retirement or those who have already
retired. It primarily markets to upscale consumers in the U.S., selling
individual and group fixed and variable annuities. Its major product lines,
"Regatta" and "Futurity," are combination fixed/variable annuities. In these
combination annuities, contract holders have the choice of allocating payments
either to a fixed account, which provides a guaranteed rate of return, or to
variable accounts. Withdrawals from the Company's fixed account are subject to
market value adjustment. In the variable accounts, the contract holder can
choose from a range of investment options and styles. The return depends upon
investment performance of the options selected. Investment funds available under
Regatta are managed by MFS, an affiliate of the Company. Investment funds
available under Futurity products are managed by several investment managers,
including MFS and Sun Capital Advisers, Inc., a subsidiary of the Company.
    
 
   
      The Company distributes these annuity products through a variety of
channels. For the Regatta products, about half are sold through securities
brokers, a further one-fourth through financial institutions, and the remainder
through insurance agents and financial planners. The Futurity products,
introduced in February 1998, are distributed through a dedicated wholesaler
network, including Sun Life of Canada (US) Distributors, Inc., that services
similar distribution channels.
    
 
   
      Although new pension products are not currently sold, there has been a
substantial block of group retirement business in-force, including guaranteed
investment contracts ("GICs"), pension plans and group annuities. A significant
portion of these pension contracts are non-surrenderable, with the result that
the Company's liquidity exposure is limited. GICs were marketed directly in the
U.S. through independent managers. In 1997, the Company decided to no longer
market group pension and GIC products.
    
 
   
      Following are the major factors affecting the Retirement Products and
Services segment results compared to the prior year:
    
 
                                       34
<PAGE>
   
1998 COMPARED TO 1997:
    
 
   
      -  A SHIFTING PATTERN IN SALES. Annuity deposits declined by about $27
         million, or 1%, to $2.2 billion in 1998. Fixed annuity account deposits
         were lower by approximately 7% in 1998, while deposits into variable
         annuity accounts have been increasing in total and as a proportion of
         total annuity deposits. These trends reflected market conditions and
         competitive factors.
    
 
   
         Deposits into the Dollar Cost Averaging (DCA) programs, a feature of
         the Company's combination fixed/variable annuity products, were a
         significant element of account deposits. Under these programs, which
         were redesigned in late 1996, deposits are made into the fixed portion
         of the annuity contract and receive a bonus rate of interest for the
         policy year. During the year, the fixed deposit is systematically
         transferred to the variable portion of the contract in equal periodic
         installments. DCA deposits overall were flat in 1998 compared to 1997.
         This pattern resulted, in part, from heightened competition, as other
         companies introduced similar DCA programs within the past year. During
         the fourth quarter of 1998, the Company introduced a higher DCA rate
         and a new six-month DCA program. DCA deposits for that quarter were
         higher, compared to the preceding 1998 quarters.
    
 
   
         An increase in variable account deposits in 1998 reflected both the
         continuing strong growth in equity markets generally and the continuing
         strong performance of the investment funds underlying the Company's
         variable annuity products. The continuing strong equity markets, low
         interest rate environment, and demographic trends, among other factors,
         have increased the demand and market for wealth accumulation products
         in the U.S., particularly for variable annuities. These factors have
         contributed to the growth in the Company's variable account deposits in
         1998, despite heightened competition.
    
 
   
         The Company introduced its Futurity line of products in February 1998.
         Related deposits represented about 6% of the total for the Retirement
         Products and Services segment in 1998, reflecting this recent
         introduction. The Company expects that sales for the Futurity product
         will continue to increase in the future, based on its beliefs that
         market demand is growing for multi-manager variable annuity products,
         such as Futurity; that the productivity of Futurity's wholesale
         distribution network, established in 1998, will continue to grow; and
         that the marketplace will respond favorably to future introductions of
         new Futurity products and product enhancements.
    
 
   
      -  HIGHER FEE INCOME RESULTING FROM HIGHER VARIABLE ANNUITY ACCOUNT
         BALANCES. The main factors driving this growth in account balances have
         been market appreciation and net deposit activity. This growth has
         generated corresponding increases in fee income, since fees are
         determined based on the average assets held in these accounts. Fee
         income increased by approximately $43 million, or 39%, in 1998.
    
 
   
      -  WHILE THERE HAS BEEN A SHIFT TO VARIABLE ACCOUNTS FROM THE GENERAL
         ACCOUNT, NET INVESTMENT INCOME HAS DECLINED. Net investment income
         reflects only income earned on invested assets of the general account.
         In 1998, net investment income for the Retirement Products and Services
         segment decreased by about $40 million, or 20%, compared to 1997,
         mainly as a result of the decline in average invested assets in the
         Company's general account. This decline in average general account
         assets mainly reflected the shift in deposits in recent years from the
         fixed account to variable accounts. It also reflected the Company's
         decision in 1997 to no longer market group pension and GIC products.
    
 
   
      -  LOWER POLICYHOLDER BENEFITS, MAINLY REFLECTING LOWER SURRENDER ACTIVITY
         COMPARED TO 1997. During 1997 and into the first half of 1998,
         surrender and withdrawal activity was high. This activity primarily
         related to a block of separate account contracts that had been issued
         seven or more years previously and for which the surrender charge
         periods had expired. While variable account surrenders have continued
         to rise, general account surrenders have declined. As a result of this
         pattern of activity, policyholder benefits (of which surrenders and
         withdrawals, the related changes in the liability for premium and other
         deposit funds, and related separate
    
 
                                       35
<PAGE>
   
         account transfers are the major elements) increased in 1997 and were
         lower in 1998. The Company expects that as the separate account block
         of business continues to grow, and as a higher proportion of it is no
         longer subject to surrender charges, surrenders will tend to increase.
    
 
   
      -  INVESTMENTS IN TECHNOLOGY AND INFRASTRUCTURE TO ENHANCE ANNUITY
         OPERATIONS. As a result of these investments, operational expenses
         increased by approximately $12 million, or 25%, in 1998 compared to
         1997. These increases reflected three main factors:
    
 
   
            (1)   HIGHER VOLUMES OF ANNUITY BUSINESS, REQUIRING GREATER
            ADMINISTRATIVE SUPPORT. The Company expects that increases in the
                  volume of its annuity business will continue to have a similar
                  effect on expenses in the near term.
    
 
   
            (2)   IMPROVEMENTS TO THE COMPUTER SYSTEMS AND TECHNOLOGY THAT
            SUPPORT THE ANNUITY BUSINESS. These improvements involved
                  information systems supporting the growth of the Company's
                  in-force business, particularly its combination fixed/variable
                  annuities. The Company expects to continue to invest in its
                  systems and technology in the future. The extent and nature of
                  these investments will depend on the Company's assessments of
                  the relative costs and benefits of given projects.
    
 
   
            (3)   COSTS ASSOCIATED WITH THE PRODUCT DESIGN AND IMPLEMENTATION OF
            THE NEW FUTURITY MULTI-MANAGER ANNUITY PRODUCT AND THE DEVELOPMENT
                  OF A NEW PRODUCT WITHIN THE REGATTA PRODUCT LINE. The Company
                  expects to continue to invest in further product enhancements
                  in the future.
    
 
   
1997 COMPARED TO 1996:
    
 
   
      -  STRONG FIXED ACCOUNT DEPOSITS. Fixed account deposits in 1997 were
         approximately $650 million, or 240%, higher than in 1996. This increase
         resulted mainly from the Company's redesign of its DCA programs in late
         1996. The Company benefited at the time from the popularity of its DCA
         program features and from the absence of major competitors offering
         similar features.
    
 
   
      -  IN 1997, VARIABLE ANNUITY DEPOSITS WERE ABOUT $200 MILLION, OR 16%,
         LOWER THAN IN 1996. This trend reflected heightened competition,
         uncertainties in the marketplace regarding the attractiveness of
         variable annuities, and customer preferences for depositing into the
         DCA programs rather than directly into the variable accounts.
    
 
   
      -  HIGHER FEE INCOME RESULTING FROM HIGHER VARIABLE ANNUITY ACCOUNT
         BALANCES. The main factors driving this growth in account balances were
         market appreciation and net deposit activity. This growth generated
         corresponding increases in fee income, since fees are determined based
         on the average assets held in these accounts.
    
 
   
      -  DECLINING GENERAL ACCOUNT BALANCES, RESULTING IN DECLINING NET
         INVESTMENT INCOME. In 1997, net investment income for the Retirement
         Products and Services segment decreased by about 16%, mainly as a
         result of a decline in average invested assets in the Company's general
         account. This decline in average general account assets mainly
         reflected the Company's decision in 1997 to no longer market group
         pension and GIC products.
    
 
   
      -  HIGHER POLICYHOLDER BENEFITS, MAINLY REFLECTING HIGH SURRENDER ACTIVITY
         IN 1997. As noted above, surrender and withdrawal activity was high in
         1997. This activity primarily related to a block of separate account
         contracts that had been issued seven or more years previously and for
         which the surrender charge period had expired. As a result of this
         pattern of activity, policyholder benefits (of which surrenders and
         withdrawals, the related changes in the liability for premium and other
         deposit funds, and related separate account transfers are the major
         elements) were unusually high in 1997 compared to 1996.
    
 
                                       36
<PAGE>
   
      -  HIGHER COMMISSIONS. Commissions increased by approximately $22 million,
         or 20%, in 1997, directly reflecting higher sales of combination
         fixed/variable annuity products in 1997 compared to 1996.
    
 
   
      -  HIGHER OPERATIONAL EXPENSES. Operational expenses increased by
         approximately $5 million, or 13%, as a result of the additional
         staffing needed to administer higher volumes of business and because of
         non-recurring costs of moving the Retirement Products and Services
         operations to a new facility.
    
 
   
      INDIVIDUAL INSURANCE SEGMENT
    
 
   
      The Individual Insurance segment comprises two main elements: internal
reinsurance and variable life products.
    
 
   
      INTERNAL REINSURANCE
    
 
   
      In recent years, the Company has had various reinsurance agreements with
its ultimate parent, Sun Life (Canada). In some of these arrangements, Sun Life
(Canada) has reinsured the mortality risks of individual life policies sold in
prior years by the Company. In another agreement, which became effective January
1, 1991 and terminated October 1, 1998, the Company reinsured certain individual
life insurance contracts issued by Sun Life (Canada). The latter agreement had a
significant effect on net income in both 1997 and 1998. The former agreements,
in the aggregate, also affected net income in those years, but to a much lesser
extent. The effects of these agreements on the Company's net income are
summarized in the following table.
    
 
   
   INTERNAL REINSURANCE-EFFECT ON INCOME FROM OPERATIONS BEFORE INCOME TAXES
                                ($ IN MILLIONS)
    
 
   
<TABLE>
<CAPTION>
                                                                              1998       1997       1996
                                                                            ---------  ---------  ---------
<S>                                                                         <C>        <C>        <C>
1991 Agreement
  Effect on operations                                                      $    24.6  $    37.1  $    35.2
  Effect of termination                                                          65.7         --         --
Other Agreements
  Effect on operations                                                           (2.1)      (1.4)      (1.6)
                                                                            ---------  ---------  ---------
Total                                                                       $    88.2  $    35.7  $    33.6
                                                                            ---------  ---------  ---------
                                                                            ---------  ---------  ---------
</TABLE>
    
 
   
      Because the 1991 agreement was in effect only through the first nine
months of 1998, related net income was correspondingly lower in 1998 than in
1997. Also contributing to the lower 1998 net income from operations from this
agreement were proportionately higher death claims in 1998. The effect of
terminating this agreement was to further increase 1998 net income by $65.7
million. Neither the net income effect of this agreement's operations nor that
of its termination will recur. The termination-related increase in 1998
represents a reasonable approximation of the value of the stream of future
earnings that the agreement would have generated had it not been terminated.
    
 
   
      VARIABLE LIFE PRODUCTS
    
 
   
      This business includes the sale of individual variable life insurance
products, primarily the Company's variable universal life product for the
company-owned life insurance ("COLI") market. This product was introduced in
late 1997. The Company expects the variable life business to grow and become
more significant in the future.
    
 
                                       37
<PAGE>
   
      CORPORATE SEGMENT
    
 
   
      This segment includes the capital of the Company, its investments in
subsidiaries and items not otherwise attributable to either the Retirement
Products and Services and Individual Insurance segments. In 1998, income from
operations decreased by $65.3 million to $4.5 million for this segment. This
decrease reflected two main factors:
    
 
   
      -  DIVIDENDS FROM SUBSIDIARIES WERE LOWER THAN IN 1997 BY $37.5 MILLION.
         This decrease mainly resulted from a December 1997 reorganization, in
         which the Company transferred its ownership of MFS to its parent
         company. As a result of this reorganization, the Company received no
         dividends from MFS in 1998. By comparison, it received $33.1 million of
         MFS dividends in 1997.
    
 
   
      -  Net investment income other than dividends from subsidiaries, was lower
         than in 1997 by $5.9, reflecting the effect of the Company's December
         1997 issuance of a $250 million surplus note to its upstream holding
         company. Interest expense exceeded investment earnings on the related
         funds.
    
 
   
      In 1997, income from operations for this segment decreased by $14.6
million, to $69.8 million. This decrease mainly reflected a decrease, by
approximately $9 million, in dividends from subsidiaries. It also reflected
higher taxes and expenses.
    
 
   
FINANCIAL CONDITION AND LIQUIDITY
    
 
   
      ASSETS
    
 
   
      The Company's total assets comprise those held in its general account and
those held in its separate accounts. General account assets support general
account liabilities. Separate accounts and their assets are of two main types:
    
 
   
    - Those assets held in a "fixed" separate account, which the Company
      established for amounts that contract holders allocate to the fixed
      portion of their combination fixed/variable deferred annuity contracts.
      Fixed separate account assets are available to fund general account
      liabilities and general account assets are available to fund the
      liabilities of this fixed separate account. The Company manages the assets
      of this fixed separate account according to general account investment
      policy guidelines.
    
 
   
    - Those assets held in a number of registered and non-registered "variable"
      separate accounts as investment vehicles for the Company's variable life
      and annuity contracts. Policyholders may choose from among various
      investment options offered under these contracts according to their
      individual needs and preferences. Policyholders assume the investment
      risks associated with these choices. General account and fixed separate
      account assets are not available to fund the liabilities of these variable
      accounts.
    
 
   
      The following table summarizes significant changes in asset balances
during 1998 and 1997. The changes are discussed below.
    
 
   
<TABLE>
<CAPTION>
                                                                  ASSETS                         % CHANGE
                                                       1998        1997        1996      1998/1997     1997/1996
                                                    ----------  ----------  ----------  ------------  ------------
                                                             ($ IN MILLIONS)
<S>                                                 <C>         <C>         <C>         <C>           <C>
General account assets                              $  2,932.2  $  4,513.5  $  4,593.9       (35.0)%       (1.75)%
Fixed separate account assets                          2,195.6     2,343.9     2,108.8        (6.3)%       11.15%
                                                    ----------  ----------  ----------      ------        ------
                                                    $  5,127.8  $  6,857.4  $  6,702.7       (25.2)%        2.31%
 
Variable separate account assets                      11,774.8     9,068.0     6,919.2        29.9%        31.06%
                                                    ----------  ----------  ----------      ------        ------
Total assets                                        $ 16,902.6  $ 15,925.4  $ 13,621.9         6.1%        16.91%
                                                    ----------  ----------  ----------      ------        ------
                                                    ----------  ----------  ----------      ------        ------
</TABLE>
    
 
   
      General account and fixed separate account assets, taken together,
decreased by 25% in 1998, but variable separate account assets increased by 30%
that year. In 1997, growth in the general account and fixed separate account was
low; variable separate account assets increased by 31%. This growth in
    
 
                                       38
<PAGE>
   
variable accounts relative to the general and fixed accounts reflects two main
factors: appreciation of the funds held in the variable separate accounts has
exceeded that of the funds held in the general and fixed separate accounts; and
annuity deposits into variable accounts have increased, while annuity deposits
into fixed accounts have slowed. The Company believes this pattern reflects a
shift in the preferences of policyholders, which is largely attributable to the
strong performance of equity markets in general and of the Company's variable
account funds in particular.
    
 
   
      The assets of the Company's general account are available to support
general account liabilities. For management purposes, it is the Company's
practice to segment its general account to facilitate the matching of assets and
liabilities. General account assets primarily comprise cash and invested assets,
which represented 98.7% of general account assets at year-end 1998. Major types
of invested asset holdings included bonds, mortgages, real estate and common
stock. The Company's bond holdings comprised 60.9% of the Company's portfolio at
year-end 1998. Bonds included both public and private issues. It is the
Company's policy to acquire only investment-grade securities. As a result, the
overall quality of the bond portfolio is high. At year-end 1998, only 5.3% of
these securities were rated below-investment-grade; I.E., they had National
Association of Insurance Commissioners ("NAIC") ratings lower than "1" or "2."
The Company's mortgage holdings amounted to $535.0 million at year-end 1998,
representing 18.5% of the total portfolio. All mortgage holdings at year-end
1998 were in good standing. The Company believes that the high quality of its
mortgage portfolio is largely attributable to its stringent underwriting
standards. At year-end 1998, investment real estate amounted to $78.0 million,
representing about 2.7% of the total portfolio. The Company invests in real
estate to enhance yields and, because of the long-term nature of these
investments, the Company uses them for purposes of matching with products having
long-term liability durations. Common stock holdings amounted to $128.4 million,
representing about 4.4% of the portfolio. These holdings comprised the Company's
ownership shares in subsidiaries.
    
 
   
      Other general account assets decreased by $1,021.4 million in 1998. This
change primarily reflected the effect of terminating the internal reinsurance
agreement with the Company's ultimate parent, discussed in "Internal
Reinsurance," above.
    
 
   
      LIABILITIES
    
 
   
      As with assets, the proportion of variable separate account liabilities to
total liabilities has been increasing. Most of the Company's liabilities
comprise reserves for life insurance and for annuity contracts and deposit
funds. The Company expects the declining trend in general account liabilities to
continue, because it believes that net maturities will continue to exceed sales
for the fixed contracts associated with these liabilities. This trend stems
mainly from the Company's 1997 decision to discontinue selling group pension and
GIC contracts and to focus its marketing efforts on its combination
fixed/variable annuity products.
    
 
   
      In December 1997, the Company borrowed $110.0 million from Sun Life
Assurance Company of Canada -- U.S. Operations Holdings, Inc. ("U.S. Holdco"),
its upstream holding company. The Company repaid this note during the first
quarter of 1998.
    
 
   
      The termination of the internal reinsurance agreement discussed above
resulted in a $1.0 billion decrease in liabilities as compared to 1997.
    
 
   
CAPITAL MARKETS RISK MANAGEMENT
    
 
   
      See "Quantitative and Qualitative Disclosures About Market Risk" below for
a discussion of the Company's capital markets risk management.
    
 
   
CAPITAL RESOURCES
    
 
   
      CAPITAL ADEQUACY
    
 
   
      The National Association of Insurance Commissioners ("NAIC") adopted
regulations at the end of 1993 that established minimum capitalization
requirements for insurance companies, based on risk-
    
 
                                       39
<PAGE>
   
based capital ("RBC") formulas. These requirements are intended to identify
undercapitalized companies, so that specific regulatory actions can be taken on
a timely basis. The RBC formula for life insurance companies sets capital
requirements related to asset, insurance, interest rate, and business risks.
According to the RBC calculation, the Company's capital was well in excess of
its required capital at year-end 1998.
    
 
   
      LIQUIDITY
    
 
   
      The Company's liquidity requirements are generally met by funds from
operations. The Company's main uses of funds are to pay out death benefits and
other maturing insurance and annuity contract obligations; to make pay-outs on
contract terminations; to purchase new investments; to fund new business
ventures; and to pay normal operating expenditures and taxes. The Company's main
sources of funds are premiums and deposits on insurance and annuity products;
proceeds from the sale of investments; income from investments; and repayments
of investment principal.
    
 
   
      In managing its general account and fixed separate account assets in
relation to its liabilities, the Company has segmented these assets by product
or by groups of products. The Company manages each segment's assets based on an
investment policy that it has established for that segment. Among other matters,
this investment policy considers liquidity requirements and provides cash flow
estimates. The Company reviews these policies quarterly.
    
 
   
      The Company's liquidity targets are intended to enable it to meet its
day-to-day cash requirements. On a quarterly basis, the Company compares its
total "liquifiable" assets to its total demand liabilities. Liquifiable assets
comprise cash and assets that could quickly be converted to cash should the need
arise. These assets include short-term investments and other current assets and
investment-grade bonds. The Company's policy is to maintain a liquidity ratio in
excess of 100%, and it did so throughout 1998. Based on its ongoing liquidity
analyses, the Company believes that its available liquidity is more than
sufficient to meet its liquidity needs.
    
 
   
DEMUTUALIZATION
    
 
   
      On January 27, 1998, Sun Life (Canada) announced that its Board of
Directors had requested management world-wide to develop a plan to convert from
a mutual life insurance company into a publicly traded stock company through
demutualization worldwide. Management has put in place a full time task force
which, together with a worldwide team of actuarial, financial and legal
advisers, has begun work. The Board will decide later this year whether to
proceed with demutualization, following the completion of the plan.
Demutualization would require regulatory and policyholder approval. Based on
information known to date, the potential demutualization of Sun Life (Canada) is
not expected to have any significant impact on the Company.
    
 
   
YEAR 2000 COMPLIANCE
    
 
   
      During the fourth quarter of 1996, the Company, Sun Life (Canada) and
affiliates began a comprehensive analysis of its information technology ("IT")
and non-IT systems, including its hardware, software, data, data feed products,
and internal and external supporting services, to address the ability of these
systems to correctly process date calculations through the year 2000 and beyond.
The Company created a full-time Year 2000 project team in early 1997 to manage
this endeavor across the Company. This team, which works with dedicated
personnel from all business units and with the legal and audit departments,
reports directly to the Company's senior management on a monthly basis. In
addition, the Company's Year 2000 project is periodically reviewed by internal
and external auditors.
    
 
   
      To date, relevant systems have been identified and their components
inventoried, needed resolutions have been documented, timelines and project
plans have been developed, and remediation and testing are in process. Over 90%
of the components have been remediated, tested and are certified as Year 2000
compliant. The majority of the remaining components are in the testing phase and
are expected to be certified over the course of this year.
    
 
                                       40
<PAGE>
   
      In mid-1997, the project team contacted all key vendors to obtain either
their certification for the products and services provided or their plan to make
those products and services compliant. Approximately 95% of these vendors have
responded and the project team has reviewed the responses and validated and
conducted tests with the vendors where appropriate. In addition, the project
team continues to work with critical business partners, such as third-party
administrators, investment property managers, investment mortgage
correspondents, and others, with the goal that these partners will continue to
be able to support the Company's objective of assuring Year 2000 compliance.
    
 
   
      Non-IT applications, including building security, HVAC systems, and other
such systems, will be tested. Compliant client server and mainframe environments
have been built which allow for testing of critical dates such as December
31,1999, January 1, 2000, February 28, 2000, February 29, 2000 and March 1, 2000
without impact to current production.
    
 
   
      Although the Company expects all critical systems to be Year 2000
compliant before the end of 1999, there can be no assurance that this result
will be achieved. Factors giving rise to this uncertainty include possible loss
of technical resources to perform the work, failure to identify all susceptible
systems, non-compliance by third-parties whose systems and operations affect the
Company, and other similar uncertainties. A possible worst-case scenario might
include one or more of the Company's significant systems being non-compliant.
Such a scenario could result in material disruption to the Company's operations.
Consequences of such disruptions could include, among other possibilities, the
inability to update customers' accounts, process payments and other financial
transactions; and report accurate data to customers, management, regulators, and
others. Consequences also could include business interruptions or shutdowns,
reputational harm, increased scrutiny by regulators, and litigation related to
Year 2000 issues. Such potential consequences, depending on their nature and
duration, could have a material impact on the Company's results of operations
and financial position.
    
 
   
      In order to mitigate the risks to the Company of material adverse
operational or financial impacts from failure to achieve planned Year 2000
compliance, the Company has established contingency planning at the business
unit and corporate levels. Each business unit has ranked its applications as
being of high, medium or low business risk to ensure that the most critical are
addressed first. The business units also have developed alternate plans of
action where possible, and established dates for the alternate plans to be
enacted. On the corporate level, the Company is in the process of enhancing its
business continuation plan by identifying minimum requirements for facilities,
computing, staffing, and other factors, and it is developing a plan to support
those requirements.
    
 
   
      As of year-end 1998, the Company had expended, cumulatively, approximately
$4.2 million on its Year 2000 effort, and it expects to incur a further $1.3
million on this effort in 1999.
    
 
   
SALE OF SUBSIDIARY
    
 
   
      In February 1999, the Company completed the sale of its wholly-owned
subsidiary, Massachusetts Casualty Insurance Company ("MCIC"), to Centre
Solutions (U.S.) Limited, a wholly-owned subsidiary of Centre Reinsurance
Holdings, Limited, for approximately $34 million. MCIC sold individual
disability insurance throughout the U.S. This transaction is not expected to
have a significant effect on the operations of the Company.
    
 
   
QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
    
 
   
      This discussion covers market risks associated with investment portfolios
that support the Company's general account liabilities. This discussion does not
cover market risks associated with those investment portfolios that support
separate account products. For these products, the policyholder, rather than the
Company, assumes these market risks.
    
 
   
      GENERAL
    
 
   
      The assets of the Company's general account are available to support
general account liabilities. For purposes of managing these assets in relation
to these liabilities, the Company notionally segments these assets by product or
by groups of products. The Company manages each segment's assets based
    
 
                                       41
<PAGE>
   
on an investment policy that it has established for that segment. The policy
covers the segment's liability characteristics and liquidity requirements,
provides cash flow estimates, and sets targets for asset mix, duration, and
quality. Each quarter, investment and business unit managers review these
policies to ensure that the policies remain appropriate, taking into account
each segment's liability characteristics.
    
 
   
      TYPES OF MARKET RISKS
    
 
   
      The Company's stringent underwriting standards and practices have resulted
in high-quality portfolios and have the effect of limiting credit risk. It is
the Company's policy, for example, not to purchase below-investment-grade
securities. Also, as a matter of investment policy, the Company assumes no
foreign currency or commodity risk; nor does it assume equity price risk except
to the extent that it holds real estate in its portfolios. (At year-end 1998,
investment real estate holdings represented approximately 3% of its total
general account portfolio.) The management of interest rate risk exposure is
discussed below.
    
 
   
INTEREST RATE RISK MANAGEMENT
    
 
   
      The Company's fixed interest rate liabilities are primarily supported by
well diversified portfolios of fixed interest investments. They are also
supported by holdings of real estate and floating rate notes. All of these fixed
interest investments are held for other than trading purposes and can include
publicly issued and privately placed bonds and commercial mortgage loans. Public
bonds can include Treasury bonds, corporate bonds, and money market instruments.
The Company's fixed income portfolios also hold securitized assets, including
mortgage-backed securities (MBS) and asset-backed securities. These securities
are subject to the same standards applied to other portfolio investments,
including relative value criteria and diversification guidelines. In portfolios
backing interest-sensitive liabilities, the Company's policy is to limit MBS
holdings to less than 10% of total portfolio assets. In all portfolios, the
Company restricts MBS investments to pass-through securities issued by U.S.
Government agencies and to collateralized mortgage obligations, which are
expected to exhibit relatively low volatility. The Company does not engage in
leveraged transactions and it does not invest in the more speculative forms of
these instruments such as the interest-only, principal-only, inverse floater, or
residual tranches.
    
 
   
      Changes in the level of domestic interest rates affect the market value of
fixed interest assets and liabilities. Segments whose liabilities mainly arise
from the sale of products containing interest rate guarantees for certain terms
are sensitive to changes in interest rates. In these segments, the Company uses
"immunization" strategies, which are specifically designed to minimize the loss
from wide fluctuations in interest rates. The Company supports these strategies
using analytical and modeling software acquired from outside vendors.
    
 
   
      Significant features of the Company's immunization models include:
    
 
   
    - an economic or market value basis for both assets and liabilities;
    
 
   
    - an option pricing methodology;
    
 
   
    - the use of effective duration and convexity to measure interest rate
      sensitivity; and
    
 
   
    - the use of "key rate durations" to estimate interest rate exposure at
      different parts of the yield curve and to estimate the exposure to
      non-parallel shifts in the yield curve.
    
 
   
      The Company's Interest Rate Risk Committee meets monthly. After reviewing
duration analyses, market conditions and forecasts, the Committee develops
specific asset management strategies for the interest-sensitive portfolios.
These strategies may involve managing to achieve small intentional mismatches,
either in terms of total effective duration or for certain key rate durations,
between the liabilities and related assets of particular segments. The Company
manages these mismatches to a tolerance range of plus or minus 0.5.
    
 
                                       42
<PAGE>
   
      Asset strategies may include the use of Treasury futures or interest rate
swaps to adjust the duration profiles for particular portfolios. All derivative
transactions are conducted under written operating guidelines and are marked to
market. Total positions and exposures are reported to the Company's Board of
Directors on a monthly basis. The counterparties to hedging transactions are
major highly rated financial institutions, with respect to which the risk of the
Company's incurring losses related to credit exposures is considered remote.
    
 
   
      Liabilities categorized as financial instruments and held in the Company's
general account at December 31, 1998 had a fair value of $1,538.3 million. Fixed
income investments supporting those liabilities had a fair value of $2,710.1
million at that date. The Company performed a sensitivity analysis on these
interest-sensitive liabilities and assets at December 31, 1998. The analysis
showed that if there were an immediate increase of 100 basis points in interest
rates, the fair value of the liabilities would show a net decrease of $46.3
million and the corresponding assets would show a net decrease of $113.2
million.
    
 
   
      By comparison, liabilities categorized as financial instruments and held
in the Company's general account at December 31, 1997 had a fair value of
$1,986.4 million. Fixed income investments supporting those liabilities had a
fair value of $3,276.2 million at that date. The Company performed a sensitivity
analysis on these interest-sensitive liabilities and assets at December 31,
1997. The analysis showed that if there were an immediate increase of 100 basis
points in interest rates, the fair value of the liabilities would show a net
decrease of $56.0 million and the corresponding assets would show a net decrease
of $108.0 million.
    
 
   
      The Company produced these estimates using computer models. Since these
models reflect assumptions about the future, they contain an element of
uncertainty. For example, the models contain assumptions about future
policyholder behavior and asset cash flows. Actual policyholder behavior and
asset cash flows could differ from what the models show. As a result, the
models' estimates of duration and market values may not reflect what actually
will occur. The models are further limited by the fact that they do not provide
for the possibility that management action could be taken to mitigate adverse
results. The Company believes that this limitation is one of conservatism, that
is, it will tend to cause the models to produce estimates that are generally
worse than one might actually expect, all other things being equal.
    
 
   
      Based on its processes for analyzing and managing interest rate risk, the
Company believes its exposure to interest rate changes will not materially
affect its near-term financial position, results of operations, or cash flows.
    
 
   
REINSURANCE
    
 
   
      The Company has agreements with Sun Life (Canada) which provide that Sun
Life (Canada) 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 1998 had the effect of decreasing net income from operations by
$2,128,000.
    
 
   
      Effective January 1, 1991 the Company entered into an agreement with Sun
Life (Canada) under which certain individual life insurance contracts issued by
Sun Life (Canada) were reinsured by the Company on a 90% coinsurance basis. Also
effective January 1, 1991, the Company entered into an agreement with Sun Life
(Canada) which provides that Sun Life (Canada) 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. The life reinsurance
assumed agreement requires the reinsurer to withhold funds in an amount equal to
the reserves assumed. These agreements had the effect of increasing income from
operations by approximately $24,579,000 for the year ended December 31, 1998.
The Company terminated these agreements, effective October 1, 1998, resulting in
an increase in income from operations of $65,679,000, which included a cash
settlement.
    
 
                                       43
<PAGE>
   
      The Company has also executed reinsurance agreements with unaffiliated
companies. These agreements provide reinsurance of certain individual life
insurance contracts on a modified coinsurance basis under which all deficiency
reserves are ceded; as well as reinsurance for variable universal life on a
yearly renewable term basis for which the Company has a maximum retention of
$2,000,000.
    
 
   
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 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 $16.9 billion at December 31, 1998, 82.7%
($13.98 billion) consisted of unitized and non-unitized separate account assets,
10.4% ($1.76 billion) was invested in bonds and similar securities, 3.2% ($541
million) was invested in mortgages, 0.7 % ($118.3 million) was invested in
subsidiaries, 0.6% ($101.4 million) was invested in real estate, and the
remaining 2.4% ($405.6 million) was invested 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 a 1998 statistical study, published
by A.M. Best, the Company ranked 37th among North American life insurance
companies based upon total assets as of December 31, 1997. Its ultimate parent
company, Sun Life (Canada), ranked 21st.
    
 
   
EMPLOYEES
    
 
   
      The Company and Sun Life (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. Expenses under this agreement amounted to approximately $16,344,000 in
1998. As of March 31, 1999, the Company had 392 direct employees employed at its
Principal Executive Office in Wellesley Hills, Massachusetts and at its
Retirement Products and Services Division in Boston, Massachusetts.
    
 
   
PROPERTIES
    
 
   
      The Company occupies office space owned by it and leased to Sun Life
(Canada), and certain unrelated parties for lease terms not exceeding five
years. The Company also occupies office space which it leases from unaffiliated
parties for various lease terms. Rent received by the Company under the leases
amounted to approximately $6,856,000 in 1998.
    
 
   
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 lst 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
    
 
                                       44
<PAGE>
   
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.
    
 
   
      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. We
and our subsidiaries are engaged in various kinds of routine litigation which,
in management's judgment, is not of material importance to our respective total
assets or material with respect to the Variable Account.
 
                                  ACCOUNTANTS
 
      The financial statements of the Variable Account for the year ended
December 31, 1998 included in the Statement of Additional Information and the
statutory financial statements of the Company for the years ended December 31,
1998, 1997 and 1996 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 report of such firm given upon their
authority as experts in accounting and auditing.
 
                              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 financial statements of the Variable Account for the year ended
December 31, 1998 are included in the Statement of Additional Information.
 
                                       45
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
STATUTORY STATEMENTS OF ADMITTED ASSETS, LIABILITIES AND
CAPITAL STOCK AND SURPLUS
DECEMBER 31, 1998 AND 1997 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                                   1998           1997
                                                                               -------------  -------------
<S>                                                                            <C>            <C>
ADMITTED ASSETS
    Bonds                                                                      $   1,763,468  $   1,910,699
    Common stocks                                                                    128,445        117,229
    Mortgage loans on real estate                                                    535,003        684,035
    Properties acquired in satisfaction of debt                                       17,207         22,475
    Investment real estate                                                            78,021         78,426
    Policy loans                                                                      41,944         40,348
    Cash and short-term investments                                                  265,226        544,418
    Other invested assets                                                             64,177         55,716
    Life insurance premiums and annuity considerations due and uncollected                --          9,203
    Investment income due and accrued                                                 35,706         39,279
    Federal income tax recoverable and interest thereon                                1,110             --
    Receivable from parent, subsidiaries and affiliates                                   --         27,136
    Funds withheld on reinsurance assumed                                                 --        982,653
    Other assets                                                                       1,928          1,842
                                                                               -------------  -------------
    General account assets                                                         2,932,235      4,513,459
    Separate account assets:
      Unitized                                                                    11,774,745      9,068,021
      Non-unitized                                                                 2,195,641      2,343,877
                                                                               -------------  -------------
    Total Admitted Assets                                                      $  16,902,621  $  15,925,357
                                                                               -------------  -------------
                                                                               -------------  -------------
LIABILITIES
    Aggregate reserve for life policies and contracts                          $   1,216,107  $   2,188,243
    Supplementary contracts                                                            1,885          2,247
    Policy and contract claims                                                           369          2,460
    Provision for policyholders' dividends and coupons payable                            --         32,500
    Liability for premium and other deposit funds                                  1,000,875      1,450,705
    Surrender values on cancelled policies                                                 5            215
    Interest maintenance reserve                                                      40,490         33,830
    Commissions to agents due or accrued                                               2,615          2,826
    General expenses due or accrued                                                    5,932          6,238
    Transfers from Separate Accounts due or accrued                                 (361,863)      (284,078)
    Taxes, licenses and fees due or accrued, excluding FIT                               401            105
    Federal income taxes due or accrued                                               25,019         56,384
    Unearned investment income                                                            23             34
    Amounts withheld or retained by company as agent or trustee                          529             47
    Remittances and items not allocated                                                5,176          1,363
    Borrowed money                                                                        --        110,142
    Asset valuation reserve                                                           44,392         47,605
    Payable to parent, subsidiaries, and affiliates                                   30,381             --
    Payable for securities                                                               428         27,104
    Other liabilities                                                                  9,770          2,924
                                                                               -------------  -------------
    General account liabilities                                                    2,022,534      3,680,894
    Separate account liabilities:
      Unitized                                                                    11,774,522      9,067,891
      Non-unitized                                                                 2,195,641      2,343,877
                                                                               -------------  -------------
    Total liabilities                                                             15,992,697     15,092,662
                                                                               -------------  -------------
CAPITAL STOCK AND SURPLUS
    Common capital stock                                                               5,900          5,900
                                                                               -------------  -------------
    Surplus notes                                                                    565,000        565,000
    Gross paid in and contributed surplus                                            199,355        199,355
    Unassigned funds                                                                 139,669         62,440
                                                                               -------------  -------------
    Surplus                                                                          904,024        826,795
                                                                               -------------  -------------
    Total common capital stock and surplus                                           909,924        832,695
                                                                               -------------  -------------
    Total Liabilities, Capital Stock and Surplus                               $  16,902,621  $  15,925,357
                                                                               -------------  -------------
                                                                               -------------  -------------
</TABLE>
 
                  SEE NOTES TO STATUTORY FINANCIAL STATEMENTS.
 
                                       46
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
STATUTORY STATEMENTS OF OPERATIONS
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996 (IN 000'S)
 
<TABLE>
<CAPTION>
                                              1998        1997        1996
                                           ----------  ----------  ----------
 <S>                                       <C>         <C>         <C>
 INCOME:
     Premiums and annuity considerations   $  210,198  $  254,066  $  266,942
     Deposit-type funds                     2,140,604   2,155,297   1,775,230
     Considerations for supplementary
       contracts without life
       contingencies and dividend
       accumulations                            2,086       1,615       2,340
     Net investment income                    184,532     270,249     303,753
     Amortization of interest maintenance
       reserve                                  2,282       1,166       1,557
     Income from fees associated with
       investment management and
       administration and contract
       guarantees from Separate Account       141,211     109,757      83,278
     Net gain from operations from
       Separate Account                            --           5          --
     Other income                              87,364     102,889      87,532
                                           ----------  ----------  ----------
     Total                                  2,768,277   2,895,044   2,520,632
                                           ----------  ----------  ----------
 BENEFITS AND EXPENSES:
     Death benefits                            15,335      17,284      12,394
     Annuity benefits                         153,636     148,135     146,654
     Disability benefits and benefits
       under accident and health policies         104         132         105
     Surrender benefits and other fund
       withdrawals                          1,933,833   1,854,004   1,507,263
     Interest on policy or contract funds        (140)        699       2,205
     Payments on supplementary contracts
       without life contingencies and
       dividend accumulations                   2,528       1,687       2,120
 
     Increase (decrease) in aggregate
       reserves for life and accident and
       health policies and contracts         (972,135)    127,278     162,678
     Decrease in liability for premium
       and other deposit funds               (449,831)   (447,603)   (392,348)
     Increase (decrease) in reserve for
       supplementary contracts without
       life contingencies and for
       dividend and coupon accumulations         (362)         42         327
                                           ----------  ----------  ----------
     Total                                    682,968   1,701,658   1,441,398
     Commissions on premiums and annuity
       considerations (direct business
       only)                                  137,718     132,700     109,894
     Commissions and expense allowances
       on reinsurance assumed                  13,032      17,951      18,910
     General insurance expenses                58,132      46,624      37,206
     Insurance taxes, licenses and fees,
       excluding federal income taxes           7,388       8,267       8,431
     Increase (decrease) in loading on
       and cost of collection in excess
       of loading on deferred and
       uncollected premiums                    (1,663)        523         901
     Net transfers to Separate Accounts       722,851     844,130     761,941
     Reserve and fund adjustments on
       reinsurance terminated               1,017,112          --          --
                                           ----------  ----------  ----------
     Total                                  2,637,538   2,751,853   2,378,681
                                           ----------  ----------  ----------
     Net gain from operations before
       dividends to policyholders and
       Federal Income Taxes                   130,739     143,191     141,951
     Dividends to policyholders                (5,981)     33,316      29,189
                                           ----------  ----------  ----------
     Net gain from operations after
       dividends to policyholders and
       before Federal Income Taxes            136,720     109,875     112,762
     Federal income tax expense
       (benefit), (excluding tax on
       capital gains)                          11,713       7,339      (5,400)
                                           ----------  ----------  ----------
     Net gain from operations after
       dividends to policyholders and
       federal income taxes and before
       realized capital gains                 125,007     102,536     118,162
     Net realized capital gains less
       capital gains tax and transferred
       to the IMR                                 394      26,706       4,862
                                           ----------  ----------  ----------
 NET INCOME                                $  125,401  $  129,242  $  123,024
                                           ----------  ----------  ----------
                                           ----------  ----------  ----------
</TABLE>
 
                  SEE NOTES TO STATUTORY FINANCIAL STATEMENTS.
 
                                       47
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
STATUTORY STATEMENTS OF CHANGES IN CAPITAL STOCK AND SURPLUS
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996 (IN 000'S)
 
<TABLE>
<CAPTION>
                                                              1998        1997         1996
                                                           ----------  -----------  -----------
<S>                                                        <C>         <C>          <C>
Capital and surplus, Beginning of year                     $  832,695  $   567,143  $   792,452
                                                           ----------  -----------  -----------
Net income                                                    125,401      129,242      123,024
Change in net unrealized capital gains (losses)                  (384)       1,152       (1,715)
Change in non-admitted assets and related items                (1,086)        (463)          67
Change in reserve on account of change in valuation basis          --       39,016           --
Change in asset valuation reserve                               3,213        6,307      (11,812)
Surplus (contributed to) withdrawn from Separate Accounts
  during period                                                    82           --          100
Other changes in surplus in Separate Accounts Statements           10           --           --
Change in surplus notes                                            --      250,000     (335,000)
Dividends to stockholders                                     (50,000)    (159,722)          --
Aggregate write-ins for gains and losses in surplus                (7)          20           27
                                                           ----------  -----------  -----------
Net change in capital and surplus for the year                 77,229      265,552     (225,309)
                                                           ----------  -----------  -----------
Capital and surplus, End of year                           $  909,924  $   832,695  $   567,143
                                                           ----------  -----------  -----------
                                                           ----------  -----------  -----------
</TABLE>
 
                  SEE NOTES TO STATUTORY FINANCIAL STATEMENTS.
 
                                       48
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-owned subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
STATUTORY STATEMENTS OF CASH FLOW
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                               1998         1997         1996
                                            -----------  -----------  -----------
 <S>                                        <C>          <C>          <C>
 Cash Provided by Operations:
   Premiums, annuity considerations and
     deposit funds received                 $ 2,361,669  $ 2,410,919  $ 2,059,577
   Considerations for supplementary
     contracts and dividend accumulations
     received                                     2,086        1,615        2,340
   Net investment income received               236,944      345,279      324,914
   Other income received                        253,147      208,223       88,295
                                            -----------  -----------  -----------
 Total receipts                               2,853,846    2,966,036    2,475,126
                                            -----------  -----------  -----------
   Benefits paid (other than dividends)       2,107,736    2,020,747    1,671,483
   Insurance expenses and taxes paid
     (other than federal income and
     capital gains taxes)                       217,023      203,650      172,015
   Net cash transferred to Separate
     Accounts                                   800,636      895,465      755,605
   Dividends paid to policyholders               26,519       28,316       22,689
   Federal income tax payments
     (recoveries),(excluding tax on
     capital gains)                              46,965        1,397      (15,363)
   Other--net                                      (138)         698        2,205
                                            -----------  -----------  -----------
 Total payments                               3,198,741    3,150,273    2,608,634
                                            -----------  -----------  -----------
 Net cash used in operations                   (344,895)    (184,237)    (133,508)
                                            -----------  -----------  -----------
   Proceeds from long-term investments
     sold, matured or repaid (after
     deducting taxes on capital gains of
     $2,038 for 1998, $750 for 1997 and
     $1,555 for 1996)                         1,261,396    1,343,803    1,768,147
   Issuance (repayment) of surplus notes             --      250,000     (335,000)
   Other cash provided (used)                   (40,529)      71,095      147,956
                                            -----------  -----------  -----------
 Total cash provided                          1,220,867    1,664,898    1,581,103
                                            -----------  -----------  -----------
 Cash Applied:
   Cost of long-term investments acquired      (967,901)    (773,783)  (1,318,880)
   Other cash applied                          (187,263)    (310,519)    (177,982)
                                            -----------  -----------  -----------
 Total cash applied                          (1,155,164)  (1,084,302)  (1,496,862)
 Net change in cash and short-term
 investments                                   (279,192)     396,359      (49,267)
 Cash and short-term investments:
 Beginning of year                              544,418      148,059      197,326
                                            -----------  -----------  -----------
 End of year                                $   265,226  $   544,418  $   148,059
                                            -----------  -----------  -----------
                                            -----------  -----------  -----------
</TABLE>
 
                  SEE NOTES TO STATUTORY FINANCIAL STATEMENTS.
 
                                       49
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-Owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
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
variable life insurance, individual fixed and variable annuities, group fixed
and variable annuities and group pension contracts.
 
Effective May 1, 1997, the Company became a wholly-owned subsidiary of the newly
established Sun Life of Canada (U.S.) Holdings, Inc. ("Life Holdco"). On
December 18, 1997, Life Holdco became a wholly-owned subsidiary of the Sun Life
Assurance Company of Canada -- U.S. Operations Holdings, Inc. ("US Holdco"). US
Holdco is a wholly-owned subsidiary of Sun Life Assurance Company of Canada
("SLOC"). Prior to December 18, 1997, Life Holdco was a direct wholly-owned
subsidiary of SLOC.
 
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, which 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, results of operations or
cash flow in conformity with generally accepted accounting principles. (See Note
20 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
 
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 mortgage backed securities are generally carried at
amortized cost. Changes in prepayment assumptions and resulting cash flows are
evaluated periodically. The adjusted yield is used to calculate investment
income in future periods. If current book value exceeds future undiscounted cash
flows, a realized capital loss is recorded and amortized through IMR.
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 are carried 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.
 
                                       50
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-Owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
1.  DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
(CONTINUED)
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.
 
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 value as determined
by quoted market prices of the underlying investments.
 
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 of the
separate accounts, 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 $361,863,000 in 1998 and
$284,078,000 in 1997.
 
CHANGES IN ACCOUNTING PRINCIPLES AND REPORTING
 
As described more fully in Note 10, during 1997 the Company changed certain
assumptions used in determining actuarial reserves.
 
In March 1998, the National Association of Insurance Commissioners adopted the
Codification of Statutory Accounting Principles ("Codification"). The
Codification, which is intended to standardize regulatory accounting and
reporting for the insurance industry, is proposed to be effective January 1,
2001. However, statutory accounting principles will continue to be established
by individual state laws and permitted practices and it is uncertain when, or
if, the state of Delaware will require adoption of Codification for the
preparation of statutory financial statements. The Company has not finalized the
quantification of the effects of Codification on its statutory 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.
 
Certain prior year amounts have been reclassified to conform to amounts as
presented in the current year.
 
                                       51
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-Owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
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 Life of Canada (U.S.) Distributors, Inc.
(formerly Sun Investment Services Company) ("Sundisco"), New London Trust,
F.S.B. ("NLT"), Sun Life Financial Services Limited ("SLFSL"), Sun Benefit
Services Company, Inc. ("Sunbesco"), Sun Capital Advisers, Inc. ("Sun Capital"),
Sun Life Finance Corporation ("Sunfinco"), Sun Life of Canada (U.S.) SPE 97-1,
Inc. ("SPE 97-1"), Clarendon Insurance Agency, Inc. ("Clarendon") and Sun Life
Information Services Ireland Ltd. ("SLISL").
 
On February 5, 1999, the Company finalized the sale of MCIC, a disability
insurance company which issues primarily individual disability income policies,
to Centre Solutions (U.S.) Limited, a wholly-owned subsidiary of Centre
Reinsurance Holdings Limited for approximately $34 million. The impact of this
sale to the ongoing operations of the Company is not expected to be material.
 
On September 28, 1998, the Company formed SLISL as an offshore technology center
for the purpose of completing systems projects for affiliates.
 
On October 30, 1997, the Company established a wholly-owned special purpose
corporation, SPE 97-1, for the purpose of engaging in activities incidental to
securitizing mortgage loans.
 
On December 31, 1997, the Company purchased from Massachusetts Financial
Services ("MFS") all of the outstanding shares of Clarendon, a registered
broker-dealer that acts as the general distributor of certain annuity and life
insurance contracts issued by the Company and its affiliates.
 
Prior to December 24, 1997, the Company owned 93.6% of the outstanding shares of
MFS. On December 24, 1997, the Company transferred all of its shares of MFS to
Life Holdco in the form of a dividend valued at $159,722,000. As a result of
this transaction, the Company realized a gain of $21,195,000 of undistributed
earnings.
 
MFS, a registered investment adviser, serves as investment adviser to the mutual
funds in the MFS family of funds as well as certain mutual funds and separate
accounts established by the Company. The MFS Asset Management Group provides
investment advice to substantial private clients.
 
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.
 
Sundisco 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 offshore
products of Sun Life Assurance Company of Canada (Bermuda), an affiliate.
 
Sun Capital is a registered investment adviser.
 
Sunfinco and Sunbesco are currently inactive.
 
On September 28, 1998 a $500,000 note was issued by SLISL to the Company at a
rate of 6.0%, maturing on September 28, 2002.
 
A $110,000,000 note was issued to the Company by MFS on February 11, 1998 at an
interest rate of 6.0% due February 11, 1999. Another $110,000,000 note was
issued to the Company by MFS on December 22, 1998 at an interest rate of 5.55%
due February 11, 1999.
 
                                       52
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-Owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
2.  INVESTMENTS IN SUBSIDIARIES (CONTINUED)
On December 23, 1997, the Company issued a $110,000,000 note to US Holdco at an
interest rate of 5.80%, which was repaid on March 1, 1998. A $110,000,000 note
was also issued to the Company by MFS on December 23, 1997 at an interest rate
of 5.85% and was repaid on February 11, 1998.
 
On December 31, 1996, the Company issued a $58,000,000 note to SLOC at an
interest rate of 5.70% which was repaid on February 10, 1997. Also on December
31, 1996, the Company was issued a $58,000,000 note by MFS at an interest rate
of 5.76%. This note was repaid to the Company on February 10, 1997. On December
31, 1998, 1997 and 1996, the Company had an additional $20,000,000 in notes
issued by MFS, scheduled to mature in 2000.
 
During 1998, 1997, and 1996, the Company contributed capital in the following
amounts to its subsidiaries:
 
<TABLE>
<CAPTION>
                                                                                     1998       1997       1996
                                                                                   ---------  ---------  ---------
                                                                                           (IN THOUSANDS)
<S>                                                                                <C>        <C>        <C>
MCIC                                                                                      --  $   2,000  $  10,000
SLFSL                                                                              $     750      1,000      1,500
SPE 97-1                                                                                  --     20,377         --
Sundisco                                                                              10,000         --         --
Sun Capital                                                                              500         --         --
Clarendon                                                                                 10         --         --
SLISL                                                                                    502         --         --
</TABLE>
 
Summarized combined financial information of the Company's subsidiaries as of
December 31, 1998, 1997 and 1996 and for the years then ended, follows:
 
<TABLE>
<CAPTION>
                                                                           1998           1997           1996
                                                                       -------------  -------------  -------------
                                                                                     (IN THOUSANDS)
<S>                                                                    <C>            <C>            <C>
Intangible assets                                                      $          --  $          --  $       9,646
Other assets                                                               1,315,317      1,190,951      1,376,014
Liabilities                                                               (1,186,872)    (1,073,966)    (1,241,617)
                                                                       -------------  -------------  -------------
Total net assets                                                       $     128,445  $     116,985  $     144,043
                                                                       -------------  -------------  -------------
                                                                       -------------  -------------  -------------
Total revenues                                                         $     222,853  $     750,364  $     717,280
Operating expenses                                                          (221,933)      (646,896)      (624,199)
Income tax expense                                                            (1,222)       (43,987)       (42,820)
                                                                       -------------  -------------  -------------
Net income (loss)                                                      $        (302) $      59,481  $      50,261
                                                                       -------------  -------------  -------------
                                                                       -------------  -------------  -------------
</TABLE>
 
On December 24, 1997, the Company transferred all of its shares of MFS to its
parent, Life Holdco.
 
                                       53
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-Owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
3.  BONDS
 
    Investments in debt securities are as follows:
 
<TABLE>
<CAPTION>
                                                                               DECEMBER 31, 1998
                                                              ----------------------------------------------------
                                                                               GROSS        GROSS      ESTIMATED
                                                               AMORTIZED    UNREALIZED   UNREALIZED       FAIR
                                                                  COST         GAINS      (LOSSES)       VALUE
                                                              ------------  -----------  -----------  ------------
                                                                                 (IN THOUSANDS)
<S>                                                           <C>           <C>          <C>          <C>
Long-term bonds:
    United States government and government agencies and
      authorities                                             $    140,417   $   7,635    $    (177)  $    147,875
    States, provinces and political subdivisions                    16,632       2,219           --         18,851
    Public utilities                                               397,670      38,740         (238)       436,172
    Transportation                                                 197,207      22,481          (18)       219,670
    Finance                                                        144,958      12,542         (494)       157,006
    All other corporate bonds                                      866,584      50,814       (6,419)       910,979
                                                              ------------  -----------  -----------  ------------
        Total long-term bonds                                    1,763,468     134,431       (7,346)     1,890,553
                                                              ------------  -----------  -----------  ------------
Short-term bonds:
    U.S. Treasury Bills, bankers acceptances and commercial
      paper                                                         43,400          --           --         43,400
    Affiliates                                                     220,000          --           --        220,000
                                                              ------------  -----------  -----------  ------------
        Total short-term bonds                                     263,400          --           --        263,400
                                                              ------------  -----------  -----------  ------------
Total bonds                                                   $  2,026,868   $ 134,431    $  (7,346)  $  2,153,953
                                                              ------------  -----------  -----------  ------------
                                                              ------------  -----------  -----------  ------------
</TABLE>
 
<TABLE>
<CAPTION>
                                                                               DECEMBER 31, 1997
                                                              ----------------------------------------------------
                                                                               GROSS        GROSS      ESTIMATED
                                                               AMORTIZED    UNREALIZED   UNREALIZED       FAIR
                                                                  COST         GAINS      (LOSSES)       VALUE
                                                              ------------  -----------  -----------  ------------
                                                                                 (IN THOUSANDS)
<S>                                                           <C>           <C>          <C>          <C>
Long-term bonds:
    United States government and government agencies and
      authorities                                             $    126,923   $   5,529    $      --   $    132,452
    States, provinces and political subdivisions                    22,361       2,095           --         24,456
    Public utilities                                               398,939      35,338          (91)       434,186
    Transportation                                                 214,130      22,000         (390)       235,740
    Finance                                                        157,891       5,885         (120)       163,656
    All other corporate bonds                                      990,455      52,678       (5,456)     1,037,677
                                                              ------------  -----------  -----------  ------------
        Total long-term bonds                                    1,910,699     123,525       (6,057)     2,028,167
                                                              ------------  -----------  -----------  ------------
Short-term bonds:
    U.S. Treasury Bills, bankers acceptances and commercial
      paper                                                        431,032          --           --        431,032
    Affiliates                                                     110,000          --           --        110,000
                                                              ------------  -----------  -----------  ------------
        Total short-term bonds                                     541,032          --           --        541,032
                                                              ------------  -----------  -----------  ------------
Total bonds                                                   $  2,451,731   $ 123,525    $  (6,057)  $  2,569,199
                                                              ------------  -----------  -----------  ------------
                                                              ------------  -----------  -----------  ------------
</TABLE>
 
                                       54
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-Owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
3.  BONDS (CONTINUED)
The amortized cost and estimated fair value of bonds at December 31, 1998 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, 1998
                                                                                        --------------------------
                                                                                         AMORTIZED     ESTIMATED
                                                                                            COST       FAIR VALUE
                                                                                        ------------  ------------
                                                                                              (IN THOUSANDS)
<S>                                                                                     <C>           <C>
Maturities:
    Due in one year or less                                                             $    459,631  $    460,787
    Due after one year through five years                                                    329,625       336,516
    Due after five years through ten years                                                   264,372       283,840
    Due after ten years                                                                      703,341       781,253
                                                                                        ------------  ------------
                                                                                           1,756,969     1,862,396
    Mortgage-backed securities                                                               269,899       291,557
                                                                                        ------------  ------------
Total bonds                                                                             $  2,026,868  $  2,153,953
                                                                                        ------------  ------------
                                                                                        ------------  ------------
</TABLE>
 
Proceeds from sales and maturities of investments in debt securities during
1998, 1997, and 1996 were $1,016,811,000, $980,264,000, and $1,554,016,000,
gross gains were $17,025,000, $10,732,000, and $16,975,000 and gross losses were
$866,000, $2,446,000, and $10,885,000, respectively.
 
Bonds included above with an amortized cost of approximately $2,572,000,
$2,578,000 and $2,060,000 at December 31, 1998, 1997 and 1996, respectively,
were on deposit with governmental authorities as required by law.
 
Excluding investments in U.S. government and agencies securities, the Company is
not exposed to significant concentration of credit risk in its portfolio.
 
4.  SECURITIES LENDING
 
    The Company has a securities lending program operated on its behalf by the
Company's primary custodian, Chase Manhattan Bank of New York. The custodian has
indemnified the Company against losses arising from this program. There were no
securities out on loan as of December 31, 1998 and 1997. Income resulting from
this program was $94,000, $200,000 and $137,000 for the years ended December 31,
1998, 1997 and 1996, 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
allowances for losses have been made. In those cases where, in management's
judgment, the mortgage loans' values are impaired, appropriate losses are
recorded.
 
                                       55
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-Owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
5.  MORTGAGE LOANS (CONTINUED)
The following table shows the geographical distribution of the mortgage loan
portfolio.
 
<TABLE>
<CAPTION>
                                                                                                 DECEMBER 31,
                                                                                            ----------------------
                                                                                               1998        1997
                                                                                            ----------  ----------
                                                                                                (IN THOUSANDS)
<S>                                                                                         <C>         <C>
California                                                                                  $   82,397  $  119,122
Massachusetts                                                                                   53,528      58,981
Michigan                                                                                        34,357      42,912
New York                                                                                        21,190      45,696
Ohio                                                                                            36,171      51,862
Pennsylvania                                                                                    93,587      97,949
Washington                                                                                      36,548      54,948
All other                                                                                      177,225     212,565
                                                                                            ----------  ----------
                                                                                            $  535,003  $  684,035
                                                                                            ----------  ----------
                                                                                            ----------  ----------
</TABLE>
 
The Company has restructured mortgage loans totaling $30,743,000 and $26,284,000
at December 31, 1998 and 1997, respectively, against which there are allowances
for losses of $2,120,000 and $3,026,000, respectively.
 
The Company has made commitments of mortgage loans on real estate into the
future.The outstanding commitments for these mortgages amount to $18,005,000 and
$12,300,000 at December 31, 1998 and 1997, respectively.
 
6.  INVESTMENT GAINS AND LOSSES
 
<TABLE>
<CAPTION>
                                                                                      YEARS ENDED DECEMBER 31,
                                                                                  ---------------------------------
                                                                                     1998        1997       1996
                                                                                  ----------  ----------  ---------
                                                                                           (IN THOUSANDS)
<S>                                                                               <C>         <C>         <C>
Net realized gains (losses):
Bonds                                                                             $    5,659  $    2,882  $   5,631
Common stock of affiliates                                                                --      21,195         --
Common stocks                                                                             48
Mortgage loans                                                                         2,374       3,837        763
Real estate                                                                              955       2,912        599
Other invested assets                                                                 (3,827)       (717)       567
                                                                                  ----------  ----------  ---------
Subtotal                                                                               5,209      30,109      7,560
Capital gains tax expense                                                              4,815       3,403      2,698
                                                                                  ----------  ----------  ---------
Total                                                                             $      394  $   26,706  $   4,862
                                                                                  ----------  ----------  ---------
                                                                                  ----------  ----------  ---------
Changes in unrealized gains (losses):
Common stock of affiliates                                                        $     (302) $   (2,894) $  (5,739)
Mortgage loans                                                                        (1,312)      1,524       (600)
Real estate                                                                              403       3,377      4,624
Other invested assets                                                                    827        (855)        --
                                                                                  ----------  ----------  ---------
Total                                                                             $     (384) $    1,152  $  (1,715)
                                                                                  ----------  ----------  ---------
                                                                                  ----------  ----------  ---------
</TABLE>
 
                                       56
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-Owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
6.  INVESTMENT GAINS AND LOSSES (CONTINUED)
Realized capital gains and losses on bonds and mortgages and interest rate swaps
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 net realized capital gains
credited to the interest maintenance reserve were $8,943,000 in 1998, $6,321,000
in 1997, and $7,710,000 in 1996. All gains and losses are transferred net of
applicable income taxes.
 
7.  NET INVESTMENT INCOME
 
    Net investment income consisted of:
 
<TABLE>
<CAPTION>
                                                                                    YEARS ENDED DECEMBER 31,
                                                                               ----------------------------------
                                                                                  1998        1997        1996
                                                                               ----------  ----------  ----------
                                                                                         (IN THOUSANDS)
<S>                                                                            <C>         <C>         <C>
Interest income from bonds                                                     $  167,436  $  188,924  $  178,695
Income from investment in common stock of affiliates                                3,675      41,181      50,408
Interest income from mortgage loans                                                53,269      76,073      92,591
Real estate investment income                                                      15,932      17,161      16,249
Interest income from policy loans                                                   2,881       3,582       2,790
Other investment income (loss)                                                       (641)       (193)      1,710
                                                                               ----------  ----------  ----------
Gross investment income                                                           242,552     326,728     342,443
                                                                               ----------  ----------  ----------
Interest on surplus notes and notes payable                                       (44,903)    (42,481)    (23,061)
Investment expenses                                                               (13,117)    (13,998)    (15,629)
                                                                               ----------  ----------  ----------
Net investment income                                                          $  184,532  $  270,249  $  303,753
                                                                               ----------  ----------  ----------
                                                                               ----------  ----------  ----------
</TABLE>
 
8.  DERIVATIVES
 
    The Company uses derivative instruments for interest rate 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 allocate gains or losses to specific hedged
assets or liabilities, gains or losses are deferred in IMR and amortized over
the remaining life of the hedged assets. At December 31, 1998 and 1997 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 the IMR and amortized over the shorter of the remaining life of
the hedged asset sold 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.
 
                                       57
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-Owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
8.  DERIVATIVES (CONTINUED)
Options are used to hedge the stock market interest exposure in the mortality
and expense risk charges and guaranteed minimum death benefit features of the
Company's variable annuities. The Company's open positions are as follows:
 
<TABLE>
<CAPTION>
                                                                                         SWAPS OUTSTANDING
                                                                                       AT DECEMBER 31, 1998
                                                                                 ---------------------------------
                                                                                      NOTIONAL       MARKET VALUE
                                                                                 PRINCIPAL AMOUNTS   OF POSITIONS
                                                                                 ------------------  -------------
                                                                                          (IN THOUSANDS)
<S>                                                                              <C>                 <C>
Conventional interest rate swaps                                                     $   45,000        $     508
Foreign currency swap                                                                     1,178              263
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                         SWAPS OUTSTANDING
                                                                                       AT DECEMBER 31, 1997
                                                                                 ---------------------------------
                                                                                      NOTIONAL       MARKET VALUE
                                                                                 PRINCIPAL AMOUNTS   OF POSITIONS
                                                                                 ------------------  -------------
                                                                                          (IN THOUSANDS)
<S>                                                                              <C>                 <C>
Conventional interest rate swaps                                                     $   80,000        $  (2,891)
Foreign currency swap                                                                     1,700              208
Forward spread lock swaps                                                                50,000              274
Asian Put Option S & P 500                                                               75,000              693
</TABLE>
 
The market value of swaps is the estimated amount that the Company would receive
or pay on termination or sale, taking into account current interest rates and
the current credit worthiness of the counterparties. The Company is exposed to
potential credit loss in the event of nonperformance 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.
 
                                       58
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-Owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
9.  LEVERAGED LEASES (CONTINUED)
The Company's net investment in leveraged leases is composed of the following
elements:
 
<TABLE>
<CAPTION>
                                                                                              DECEMBER 31,
                                                                                         ----------------------
                                                                                            1998        1997
                                                                                         ----------  ----------
                                                                                             (IN THOUSANDS)
<S>                                                                                      <C>         <C>
Lease contracts receivable                                                               $   78,937  $   92,605
Less non-recourse debt                                                                      (78,920)    (92,589)
                                                                                         ----------  ----------
                                                                                                 17          16
Estimated residual value of leased assets                                                    41,150      41,150
Less unearned and deferred income                                                            (8,932)    (10,324)
                                                                                         ----------  ----------
Investment in leveraged leases                                                               32,235      30,842
Less fees                                                                                      (138)       (163)
                                                                                         ----------  ----------
Net investment in leveraged leases                                                       $   32,097  $   30,679
                                                                                         ----------  ----------
                                                                                         ----------  ----------
</TABLE>
 
The net investment is included in "other invested assets" on the balance sheet.
 
10.  REINSURANCE
 
    The Company has agreements with SLOC which provide that SLOC 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 $2,128,000, $1,381,000 and
$1,603,000 for the years ended December 31, 1998, 1997 and 1996, respectively.
 
Effective January 1, 1991, the Company entered into an agreement with SLOC under
which certain individual life insurance contracts issued by SLOC were reinsured
by the Company on a 90% coinsurance basis. During 1997 SLOC changed certain
assumptions used in determining the gross and the ceded reserve balance. The
Company reflected the effect of the changes in assumptions to its assumed
reserves as a direct credit to surplus. The effect of the change was a
$39,016,000 decrease in reserves. Also, the agreement required SLOC to reinsure
the mortality risks in excess of $500,000 per policy for the individual life
insurance contracts assumed by the Company. Such death benefits are reinsured on
a yearly renewable term basis. The life reinsurance assumed agreement required
the reinsurer to withhold funds in amounts equal to the reserves assumed. These
agreements had the effect of increasing income from operations by approximately
$24,579,000, $37,050,000 and $35,161,000 for the years ended December 31, 1998,
1997 and 1996, respectively. The Company terminated this agreement effective
October 1, 1998, resulting in an increase in income from operations of
$65,679,000 which included a cash settlement.
 
                                       59
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-Owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
10.  REINSURANCE (CONTINUED)
The following are summarized pro-forma results of operations of the Company for
the years ended December 31, 1998, 1997 and 1996 before the effect of
reinsurance transactions with SLOC:
 
<TABLE>
<CAPTION>
                                                                                  YEARS ENDED DECEMBER 31,
                                                                          ----------------------------------------
                                                                              1998          1997          1996
                                                                          ------------  ------------  ------------
                                                                                       (IN THOUSANDS)
<S>                                                                       <C>           <C>           <C>
Income:
    Premiums, annuity deposits and other revenues                         $  2,377,364  $  2,340,733  $  1,941,423
    Net investment income and realized gains                                   187,208       298,120       310,172
                                                                          ------------  ------------  ------------
    Subtotal                                                                 2,564,572     2,638,853     2,251,595
                                                                          ------------  ------------  ------------
Benefits and Expenses:
    Policyholder benefits                                                    2,312,247     2,350,354     2,011,998
    Other expenses                                                             203,238       187,591       155,531
                                                                          ------------  ------------  ------------
    Subtotal                                                                 2,515,485     2,537,945     2,167,529
                                                                          ------------  ------------  ------------
Income from operations                                                    $     49,087  $    100,908  $     84,066
                                                                          ------------  ------------  ------------
                                                                          ------------  ------------  ------------
</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 increasing income from operations by $3,008,000 in 1998, and
decreasing income from operations by $2,658,000 in 1997 and $46,000 in 1996.
 
                                       60
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-Owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
11.  WITHDRAWAL CHARACTERISTICS OF ANNUITY ACTUARIAL RESERVES AND DEPOSIT
LIABILITIES
 
    The withdrawal characteristics of general account and separate account
annuity reserves and deposits are as follows:
 
<TABLE>
<CAPTION>
                                                                                               DECEMBER 31, 1998
                                                                                         -----------------------------
                                                                                            AMOUNT        % OF TOTAL
                                                                                         -------------  --------------
                                                                                                (IN THOUSANDS)
<S>                                                                                      <C>            <C>
Subject to discretionary withdrawal-with adjustment:
    With market value adjustment                                                         $   2,896,529          19
    At book value less surrender charges (surrender charge >5%)                             10,227,212          66
    At book value (minimal or no charge or adjustment)                                       1,264,453           8
Not subject to discretionary withdrawal provision                                            1,106,197           7
                                                                                         -------------         ---
Total annuity actuarial reserves and deposit liabilities                                 $  15,494,391         100
                                                                                         -------------         ---
                                                                                         -------------         ---
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                               DECEMBER 31, 1997
                                                                                         -----------------------------
                                                                                            AMOUNT        % OF TOTAL
                                                                                         -------------  --------------
                                                                                                (IN THOUSANDS)
<S>                                                                                      <C>            <C>
Subject to discretionary withdrawal-with adjustment:
    With market value adjustment                                                         $   3,415,394          25
    At book value less surrender charges (surrender charge >5%)                              7,672,211          57
    At book value (minimal or no charge or adjustment)                                       1,259,698           9
Not subject to discretionary withdrawal provision                                            1,164,651           9
                                                                                         -------------         ---
Total annuity actuarial reserves and deposit liabilities                                 $  13,511,954         100
                                                                                         -------------         ---
                                                                                         -------------         ---
</TABLE>
 
12.  SEGMENT INFORMATION
 
    The Company offers financial products and services such as fixed and
variable annuities, retirement plan services and life insurance on an individual
basis. Within these areas, the Company conducts business principally in two
operating segments and maintains a corporate segment to provide for the capital
needs of the various operating segments and to engage in other financing related
activities.
 
The Individual Insurance segment markets and administers a variety of life
insurance products sold to individuals and corporate owners of individual life
insurance. The products include whole life, universal life and variable life
products.
 
The Retirement Products and Services ("RPS") segment markets and administers
individual and group variable annuity products, individual and group fixed
annuity products which include market value adjusted annuities, and other
retirement benefit products.
 
                                       61
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-Owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
12.  SEGMENT INFORMATION (CONTINUED)
The following amounts pertain to the various business segments:
 
<TABLE>
<CAPTION>
                                                                                                  FEDERAL
                                                           TOTAL          TOTAL        PRETAX      INCOME        TOTAL
(IN THOUSANDS)                                            REVENUES    EXPENDITURES     INCOME      TAXES        ASSETS
- ------------------------------------------------------  ------------  -------------  ----------  ----------  -------------
<S>                                                     <C>           <C>            <C>         <C>         <C>
    1998
Individual Insurance                                    $    229,710   $   144,800   $   84,910  $   (4,148) $     199,683
RPS                                                        2,527,608     2,483,715       43,893      12,486     16,123,905
Corporate                                                     10,959         3,042        7,917       3,375        579,033
                                                        ------------  -------------  ----------  ----------  -------------
    Total                                               $  2,768,277   $ 2,631,557   $  136,720  $   11,713  $  16,902,621
                                                        ------------  -------------  ----------  ----------  -------------
      1997
Individual Insurance                                         304,141       272,333       31,808      13,825      1,143,697
RPS                                                        2,533,006     2,507,591       25,414      10,667     14,043,221
Corporate                                                     57,897         5,244       52,653     (17,153)       738,439
                                                        ------------  -------------  ----------  ----------  -------------
    Total                                               $  2,895,044   $ 2,785,169   $  109,875  $    7,339  $  15,925,357
                                                        ------------  -------------  ----------  ----------  -------------
      1996
Individual Insurance                                         281,309       255,846       25,463      13,931        817,115
RPS                                                        2,174,602     2,151,126       23,476       1,203     12,057,572
Corporate                                                     64,721           898       63,823     (20,534)       689,266
                                                        ------------  -------------  ----------  ----------  -------------
    Total                                               $  2,520,632   $ 2,407,870   $  112,762  $   (5,400) $  13,563,953
                                                        ------------  -------------  ----------  ----------  -------------
</TABLE>
 
- ------------------------
 
* Total expenditures include dividends to policyholders of $(5,981) for 1998,
  $33,316 for 1997 and $29,189 for 1996.
 
13.  RETIREMENT PLANS
 
    The Company participates with SLOC in a noncontributory 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; currently, the plan is
fully funded. 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 SLOC.
 
The Company's share of the group's accrued pension cost was $1,178,000 and
$593,000 at December 31, 1998 and 1997, respectively. The Company's share of net
periodic pension cost was $586,000, $146,000 and $27,000, for 1998, 1997 and
1996, respectively.
 
The Company also participates with SLOC 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 $231,000, $259,000 and $233,000 for the years ended December
31, 1998, 1997 and 1996, 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.
 
                                       62
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-Owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
13.  RETIREMENT PLANS (CONTINUED)
Effective January 1, 1993, the Company adopted Statement of Financial Accounting
Standards ("SFAS") No. 106, "Employer's Accounting for Postretirement Benefits
Other Than Pensions." SFAS No. 106 requires an accrual of 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 obligation of approximately $455,000 is recognized 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 $95,000, $117,000, and
$8,000 for the years ended December 31, 1998, 1997, and 1996, respectively. The
Company's post retirement health, dental and life insurance benefits currently
are not funded.
 
OTHER POST-RETIREMENT BENEFIT PLANS CONTINUED
 
The following table sets forth the change in the pension and other
postretirement benefit plans' benefit obligations and assets as well as the
plans' funded status reconciled with the amount shown in the Company's financial
statements at December 31:
 
<TABLE>
<CAPTION>
                                                                        PENSION BENEFITS        OTHER BENEFITS
                                                                        1998        1997        1998       1997
                                                                     ----------  ----------  ----------  ---------
                                                                                    (IN THOUSANDS)
<S>                                                                  <C>         <C>         <C>         <C>
Change in benefit obligation:
    Benefit obligation at beginning of year                          $   79,684  $   70,848  $    9,845  $   9,899
    Service cost                                                          4,506       4,251         240        306
    Interest cost                                                         6,452       5,266         673        725
    Amendments                                                               --       1,000          --         --
    Actuarial loss (gain)                                                21,975          --         308       (801)
    Benefits paid                                                        (1,825)     (1,681)       (647)      (284)
                                                                     ----------  ----------  ----------  ---------
Benefit obligation at end of year                                    $  110,792  $   79,684  $   10,419  $   9,845
                                                                     ----------  ----------  ----------  ---------
                                                                     ----------  ----------  ----------  ---------
The Company's share:
    Benefit obligation at beginning of year                          $    5,094  $    4,529  $      385  $     384
    Benefit obligation at end of year                                $    9,125  $    5,094  $      416  $     385
Change in plan assets:
    Fair value of plan assets at beginning of year                   $  136,610  $  122,807  $       --  $      --
    Actual return on plan assets                                         16,790      15,484          --         --
    Employer contribution                                                    --          --         647        284
    Benefits paid                                                        (1,825)     (1,681)       (647)      (284)
                                                                     ----------  ----------  ----------  ---------
Fair value of plan assets at end of year                             $  151,575  $  136,610  $       --  $      --
                                                                     ----------  ----------  ----------  ---------
                                                                     ----------  ----------  ----------  ---------
Funded status                                                        $   40,783  $   56,926  $  (10,419) $  (9,845)
Unrecognized net actuarial gain (loss)                                   (2,113)    (18,147)        586        257
Unrecognized transition obligation (asset)                              (24,674)    (26,730)        185        230
Unrecognized prior service cost                                           7,661       8,241          --         --
                                                                     ----------  ----------  ----------  ---------
Prepaid (accrued) benefit cost                                       $   21,657  $   20,290  $   (9,648) $  (9,358)
                                                                     ----------  ----------  ----------  ---------
                                                                     ----------  ----------  ----------  ---------
The Company's share of accrued benefit cost                          $   (1,178) $     (593) $     (195) $    (102)
Weighted-average assumptions as of December 31:
    Discount rate                                                         6.75%       7.50%       6.75%      7.50%
    Expected return on plan assets                                        8.00%       7.50%         N/A        N/A
    Rate of compensation increase                                         4.50%       4.50%         N/A        N/A
</TABLE>
 
                                       63
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-Owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
13.  RETIREMENT PLANS (CONTINUED)
For measurement purposes, a 10.1% annual rate of increase in the per capita cost
of covered health care benefits was assumed for 1998 (5.7% for dental benefits).
The rates were assumed to decrease gradually to 5% for 2005 and remain at that
level thereafter.
 
<TABLE>
<CAPTION>
                                                                               1998       1997       1998       1997
                                                                            ----------  ---------  ---------  ---------
<S>                                                                         <C>         <C>        <C>        <C>
Components of net periodic benefit cost:
    Service cost                                                            $    4,506  $   4,251  $     240  $     306
    Interest cost                                                                6,452      5,266        673        725
    Expected return on plan assets                                             (10,172)    (9,163)        --         --
    Amortization of transition obligation (asset)                               (2,056)    (2,056)        45         45
    Amortization of prior service cost                                             580        517         --         --
    Recognized net actuarial (gain) loss                                          (677)      (789)       (20)        71
                                                                            ----------  ---------  ---------  ---------
Net periodic benefit cost                                                   $   (1,367) $  (1,974) $     938  $   1,147
                                                                            ----------  ---------  ---------  ---------
                                                                            ----------  ---------  ---------  ---------
    The Company's share of net periodic benefit cost                        $      586  $     146  $      95  $     117
                                                                            ----------  ---------  ---------  ---------
                                                                            ----------  ---------  ---------  ---------
</TABLE>
 
Assumed health care cost trend rates have a significant effect on the amounts
reported for the health care plans. A one-percentage-point change in assumed
health care cost trend rates would have the following effects:
 
<TABLE>
<CAPTION>
                                                                          1-PERCENTAGE-POINT   1-PERCENTAGE-POINT
                                                                               INCREASE             DECREASE
                                                                          -------------------  -------------------
                                                                                       (IN THOUSANDS)
<S>                                                                       <C>                  <C>
Effect on total of service and interest cost components                        $     210            $    (170)
Effect on postretirement benefit obligation                                        2,026               (1,697)
</TABLE>
 
                                       64
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-Owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
14.  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, 1998 and 1997:
<TABLE>
<CAPTION>
                                                                  DECEMBER 31, 1998
                                                       ---------------------------------------
                                                        CARRYING AMOUNT   ESTIMATED FAIR VALUE
                                                       -----------------  --------------------
                                                                   (IN THOUSANDS)
<S>                                                    <C>                <C>
ASSETS:
Bonds                                                    $   2,026,868        $  2,153,953
Mortgages                                                      535,003             556,143
Derivatives                                                         --                 771
LIABILITIES:
Insurance reserves                                       $     121,100        $    121,100
Individual annuities                                           274,448             271,849
Pension products                                             1,104,489           1,145,351
 
<CAPTION>
 
                                                                  DECEMBER 31, 1997
                                                       ---------------------------------------
                                                        CARRYING AMOUNT   ESTIMATED FAIR VALUE
                                                       -----------------  --------------------
                                                                   (IN THOUSANDS)
<S>                                                    <C>                <C>
ASSETS:
Bonds                                                    $   2,451,731        $  2,569,199
Mortgages                                                      684,035             706,975
LIABILITIES:
Insurance reserves                                       $     123,128        $    123,128
Individual annuities                                           307,668             302,165
Pension products                                             1,527,433           1,561,108
Derivatives                                                         --              (1,716)
</TABLE>
 
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
by 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 insurance 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.
 
                                       65
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-Owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
15.  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 table shown below presents changes in the major elements of the AVR and IMR.
 
<TABLE>
<CAPTION>
                                                                                 YEARS ENDED DECEMBER 31,
                                                                                1998                  1997
                                                                        --------------------  --------------------
                                                                           AVR        IMR        AVR        IMR
                                                                        ---------  ---------  ---------  ---------
                                                                                      (IN THOUSANDS)
<S>                                                                     <C>        <C>        <C>        <C>
Balance, beginning of year                                              $  47,605  $  33,830  $  53,911  $  28,675
Net realized investment gains, net of tax                                     256      8,942     17,400      6,321
Amortization of net investment gains                                           --     (2,282)        --     (1,166)
Unrealized investment losses                                               (6,550)        --     (2,340)        --
Required by formula                                                         3,081         --    (21,366)        --
                                                                        ---------  ---------  ---------  ---------
Balance, end of year                                                    $  44,392  $  40,490  $  47,605  $  33,830
                                                                        ---------  ---------  ---------  ---------
                                                                        ---------  ---------  ---------  ---------
</TABLE>
 
16.  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 $48,144,000, $31,000,000 and
$19,264,000 for the years ended December 31, 1998, 1997 and 1996, respectively.
The Company is currently undergoing an audit by the Internal Revenue Service.
The Company believes that there will be no material audit adjustments for the
periods under examination.
 
17.  SURPLUS NOTES AND NOTES RECEIVABLE (PAYABLE)
 
    On December 22, 1997, the Company issued a $250,000,000 surplus note to Life
Holdco. This note has an interest rate of 8.625% and is due on or after November
6, 2027.
 
On May 9, 1997, the Company issued a short-term note of $600,000,000 to Life
Holdco at an interest rate of 5.10%, which was extended at various interest
rates. This note was repaid on December 22, 1997.
 
On December 19, 1995, the Company issued surplus notes totaling $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
semiannually.
 
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 with the
consent of the Delaware Insurance Commissioner.
 
                                       66
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-Owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
17.  SURPLUS NOTES AND NOTES RECEIVABLE (PAYABLE) (CONTINUED)
The Company accrued $4,259,000 and $ 964,000 for interest on surplus notes for
the years ended December 31, 1998 and 1997, respectively.
 
The Company accrued $4,259,000 and $964,000 for interest on surplus notes for
the years ended December 31, 1998 and 1997, respectively.
 
The Company expensed $44,903,000, $42,481,000 and $23,061,000 for interest on
surplus notes and notes payable for the years ended December 31, 1998, 1997 and
1996, respectively.
 
18.  TRANSACTIONS WITH AFFILIATES
 
    The Company has an agreement with SLOC which provides that SLOC will
furnish, as requested, personnel as well as certain services and facilities on a
cost-reimbursement basis. Expenses under this agreement amounted to
approximately $16,344,000 in 1998, $15,997,000 in 1997, and $20,192,000 in 1996.
 
The Company leases office space to SLOC under lease agreements with terms
expiring in September, 1999 and options to extend the terms for each of thirteen
successive five-year terms at fair market rental not to exceed 125% of the fixed
rent for the term which is ending. Rent received by the Company under the leases
for 1998 amounted to approximately $6,856,000.
 
19.  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, 1998, 1997 and 1996.
 
20.  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 Company's surplus. Changes in the net equity value of the common stock of
all other subsidiaries are directly reflected in the Company's Asset Valuation
Reserve. 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 nonadmitted 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 and GAAP. Actuarial assumptions and reserving methods
differ under statutory accounting practices and GAAP. Premiums for universal
 
                                       67
<PAGE>
SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
(Wholly-Owned Subsidiary of Sun Life of Canada (U.S.) Holdings, Inc.)
 
NOTES TO STATUTORY FINANCIAL STATEMENTS (CONTINUED)
YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
 
20.  ACCOUNTING POLICIES AND PRINCIPLES (CONTINUED)
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 Sun Life Assurance Company of Canada
(U.S.) has determined that the cost of complying with Statement No. 120,
"Accounting and Reporting by Mutual Insurance Enterprises and by Insurance
Enterprises for Certain Long Duration Participating Contracts", exceeds 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.
 
                                       68
<PAGE>
INDEPENDENT AUDITORS' REPORT
 
TO THE BOARD OF DIRECTORS AND STOCKHOLDERS
 
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.) (the "Company") as of December 31, 1998 and 1997, 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, 1998.
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 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. 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.
 
As described more fully in Notes 1 and 20 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 is a comprehensive basis of accounting other than generally accepted
accounting principles. The effects on the financial statements of the
differences between the statutory basis of accounting and generally accepted
accounting principles, although not reasonably determinable, are presumed to be
material.
 
In our opinion, the statutory 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 December
31, 1998 and 1997, and the results of its operations and its cash flow for each
of the three years in the period ended December 31, 1998 on the basis of
accounting described in Notes 1 and 20.
 
However, because of the differences between the two bases of accounting referred
to in the second preceding paragraph, in our opinion, the statutory 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, 1998 and 1997 or the results of its
operations or its cash flow for each of the three years in the period ended
December 31, 1998.
 
As management has stated in Note 20, 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, ACCOUNTING AND REPORTING BY MUTUAL LIFE
INSURANCE ENTERPRISES AND BY INSURANCE ENTERPRISES FOR CERTAIN LONG-DURATION
PARTICIPATING CONTRACTS, 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
Boston, Massachusetts
 
February 5, 1999
 
                                       69
<PAGE>
            TABLE OF CONTENTS OF STATEMENT OF ADDITIONAL INFORMATION
 
<TABLE>
<S>                                                                                    <C>
Calculation of Performance Data -- Average Annual Total Return.......................
Non-Standardized Investment Performance..............................................
Advertising and Sales Literature.....................................................
Calculations.........................................................................
  Example of Variable Accumulation Unit Value Calculation............................
  Example of Variable Annuity Unit Calculation.......................................
  Example of Variable Annuity Payment Calculation....................................
  Calculation of Annuity Unit Values.................................................
Distribution of the Contracts........................................................
Designation and Change of Beneficiary................................................
Custodian............................................................................
Financial Statements.................................................................
</TABLE>
 
                                       70
<PAGE>
   
      This Prospectus sets forth information about the Contracts and the
Variable Account that a prospective purchaser should know before investing.
Additional information about the Contracts and the Variable Account has been
filed with the Securities and Exchange Commission in a Statement of Additional
Information dated May 3, 1999 which is incorporated herein by reference. The
Statement of Additional Information is available upon request and without charge
from Sun Life Assurance Company of Canada (U.S.). To receive a copy, return this
request form to the address shown below or telephone (617) 348-9600 or (800)
752-7215.
    
 
- --------------------------------------------------------------------------------
 
To:    Sun Life Assurance Company of Canada (U.S.)
     Annuity Service Mailing Address:
     c/o Retirement Products and Services
     P.O. Box 1024
     Boston, Massachusetts 02103
 
Please send me a Statement of Additional Information for
     MFS Regatta Platinum Variable and Fixed Annuity
     Sun Life of Canada (U.S.) Variable Account F.
 
Name
- --------------------------------------------------------------
 
Address
- --------------------------------------------------------------
 
       -------------------------------------------------------------------------
 
City
- ------------------------------------  State
- --------------  Zip
- -------
 
Telephone
- ----------------------------------------------------------------
 
                                       71
<PAGE>
                                   APPENDIX A
                                    GLOSSARY
 
      The following terms as used in this Prospectus have the indicated
meanings:
 
      ACCOUNT OR PARTICIPANT ACCOUNT: An account established for each
Participant to which Net Purchase Payments are credited.
 
      ACCOUNT VALUE: The Variable Accumulation Value, if any, plus the Fixed
Accumulation Value, if any, of your Account for any Valuation Period.
 
      ACCOUNT YEAR AND ACCOUNT ANNIVERSARY: Your first Account Year is the
period of (a) 12 full calendar months plus (b) the part of the calendar month in
which we issue your Contract (if not on the first day of the month), beginning
with the Contract Date. Your Account Anniversary is the first day immediately
after the end of an Account Year. Each Account Year after the first is the 12
calendar month period that begins on your Account Anniversary. If, for example,
the Contract Date is in March, the first Account Year will be determined from
the Contract Date but will end on the last day of March in the following year;
your Account Anniversary is April 1 and all Account Years after the first will
be measured from April 1.
 
   
      ACCUMULATION PHASE: The period before the Annuity Commencement Date and
during the lifetime of the Annuitant. This is called the "Accumulation Period"
in the Contract.
    
 
   
      ANNUITANT: The person or persons to whom the first annuity payment is
made. In a Non-Qualified Contract, if you name someone other than yourself as
Annuitant, you may also name a Co-Annuitant. If you do, all provisions of the
Contract based on the death of the Annuitant will be based on the date of death
of the last surviving of the persons named. By example, if the Annuitant dies
prior to the Annuity Commencement Date, the Co-Annuitant will become the new
Annuitant. The death benefit will become due only on the death before the
Annuity Commencement Date of the last surviving Annuitant and Co-Annuitant
named. These persons are referred to collectively in the Contract as
"Annuitants." If you have named both an Annuitant and Co-Annuitant, you may
designate one of them to become the sole Annuitant as of the Annuity
Commencement Date, if both are living at that time.
    
 
      *ANNUITY COMMENCEMENT DATE: The date on which the first annuity payment
under each Contract is to be made.
 
      *ANNUITY OPTION: The method you choose 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 you or other evidence acceptable to us
that serves as your application for participation under a Group Contract.
    
 
      *BENEFICIARY: Prior to the Annuity Commencement Date, the person or entity
having the right to receive the death benefit and, for Non-Qualified Contracts,
who, in the event of the Participant's death, is the "designated beneficiary"
for purposes of Section 72(s) of the Internal Revenue Code. After the Annuity
Commencement Date, the person or entity having the right to receive any payments
due under the Annuity Option elected, if applicable, upon the death of the
Payee.
 
      BUSINESS DAY: Any day the New York Stock Exchange is open for trading.
 
      CERTIFICATE: The document for each Participant which evidences the
coverage of the Participant under a Group Contract.
 
      COMPANY: Sun Life Assurance Company of Canada (U.S.).
 
      CONTRACT DATE: The date on which we issue your Contract. This is called
the "Date of Coverage" in the Contract.
 
* You specify these items on the Contract Specifications page or Certificate
Specifications page, and may change them, as we describe in this Prospectus.
 
                                       72
<PAGE>
   
      DEATH BENEFIT DATE: If you have elected a death benefit payment option
before the Annuitant's death that remains in effect, the date on which we
receive Due Proof of Death. If your Beneficiary elects the death benefit payment
option, the later of (a) the date on which we receive the Beneficiary's election
and (b) the date on which we receive Due Proof of Death. If we do not receive
the Beneficiary's election within 60 days after we receive Due Proof of Death,
the Death Benefit Date will be the last day of the 60 day period and we will pay
the death benefit in cash.
    
 
      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.
 
   
      EXPIRATION DATE: The last day of a Guarantee Period.
    
 
      FIXED ACCOUNT: The general account of the Company, consisting of all
assets of the Company other than those allocated to a separate account of the
Company.
 
      FIXED ACCOUNT VALUE: The value of that portion of your Account allocated
to the Fixed Account.
 
      FIXED ANNUITY: An annuity with payments which do not vary as to dollar
amount.
 
      GROUP CONTRACT: A Contract issued by the Company on a group basis.
 
   
      GUARANTEE AMOUNT: Each separate allocation of Account Value to a
particular Guarantee Period (including interest earned thereon).
    
 
      GUARANTEE PERIOD: The period for which a Guaranteed Interest Rate is
credited.
 
      GUARANTEED INTEREST RATE: The rate of interest we credit on a compound
annual basis during any Guarantee Period.
 
      INCOME PHASE: The period on and after the Annuity Commencement Date and
during the lifetime of the Annuitant during which we make annuity payments under
the Contract.
 
   
      NET INVESTMENT FACTOR: An index applied to measure the investment
performance of a Sun-Account from one Valuation Period to the next. The Net
Investment Factor may be greater or less than or equal to one.
    
 
   
      NET PURCHASE PAYMENT: The portion of a Purchase Payment which remains
after the deduction of any applicable premium tax or similar tax.
    
 
   
      NON-QUALIFIED CONTRACT: A Contract used in connection with a retirement
plan that does not receive favorable federal income tax treatment under Sections
401, 403, 408, or 408A 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 income tax treatment as an annuity.
    
 
      OWNER: The person, persons or entity entitled to the ownership rights
stated in a Group Contract and in whose name or names the Group 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), Section 408(k),
Section 408(p) or Section 408A 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 Group 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.
    
 
      PAYEE: A recipient of payments under a Contract. The term includes an
Annuitant or a Beneficiary who becomes entitled to benefits upon the death of
the Participant.
 
      PURCHASE PAYMENT (PAYMENT): An amount paid to the Company as consideration
for the benefits provided by a Contract.
 
                                       73
<PAGE>
      QUALIFIED CONTRACT: A Contract used in connection with a retirement plan
which may receive favorable federal income tax treatment under Sections 401,
403, 408 or 408A of the Internal Revenue Code of 1986, as amended.
 
      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 of the Series Fund.
 
      VALUATION PERIOD: The period of time from one determination of Variable
Accumulation Unit or Annuity Unit values to the next subsequent determination of
these values. Value determinations are made as of the close of the New York
Stock Exchange on each day that the Exchange is open for trading.
 
      VARIABLE ACCOUNT: Variable Account F of the Company, which is 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
Variable Account Value.
 
      VARIABLE ACCOUNT VALUE: The value of that portion of your Account
allocated to the Variable Account.
 
      VARIABLE ANNUITY: An annuity with payments which vary as to dollar amount
in relation to the investment performance of the Variable Account.
 
                                       74
<PAGE>
   
                                   APPENDIX B
           CONDENSED FINANCIAL INFORMATION--ACCUMULATION UNIT VALUES
    
 
   
      The following information should be read in conjunction with the Variable
Account's financial statements included in the Statement of Additional
Information, 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
GLOBAL 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
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
 
<CAPTION>
 
                                        1996        1997        1998
                                     ----------  ----------  ----------
<S>                                  <C>         <C>         <C>
CAPITAL APPRECIATION SERIES
  Unit Value:
    Beginning of period              $  20.6225  $  24.7064  $  29.9999
    End of period                    $  24.7064  $  29.9999  $  38.0799
  Units outstanding end of period     6,316,305   2,993,020     464,349
GLOBAL GOVERNMENTS SERIES
  Unit Value:
    Beginning of period              $  16.2514  $  16.7734  $  16.4146
    End of period                    $  16.4146  $  16.4146  $  18.6916
  Units outstanding end of period     1,460,289     700,338      89,328
GOVERNMENT SECURITIES SERIES
  Unit Value:
    Beginning of period              $  15.5323  $  15.5644  $  16.6923
    End of period                    $  15.5644  $  16.6923  $  17.8992
  Units outstanding end of period     3,362,650   1,462,222     325,241
HIGH YIELD SERIES
  Unit Value:
    Beginning of period              $  17.8678  $  19.7545  $  22.0555
    End of period                    $  19.7545  $  22.0555  $  21.8836
  Units outstanding end of period     1,204,380     537,033      73,632
MANAGED SECTORS SERIES
  Unit Value:
    Beginning of period              $  18.9987  $  22.0312  $  27.2960
    End of period                    $  22.0312  $  27.2960  $  30.2227
  Units outstanding end of period     2,202,213     941,686     196,463
MONEY MARKET SERIES
  Unit Value:
    Beginning of period              $  12.2910  $  12.7175  $  13.1780
    End of period                    $  12.7175  $  13.1780  $  13.6495
  Units outstanding end of period     3,859,738   1,518,722     268,447
TOTAL RETURN SERIES
  Unit Value:
    Beginning of period              $  17.8165  $  20.0405  $  24.1056
    End of period                    $  20.0405  $  24.1056  $  26.5642
  Units outstanding end of period    12,461,003   5,756,653     898,137
</TABLE>
    
 
- ------------------------
   
* From July 13, 1989 (date of commencement of operations) to December 31, 1989.
    
 
                                       75
<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
     1 + J + .005
 
    
 
   
      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,
    
 
                                       76
<PAGE>
   
        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.
    
 
   
EXAMPLE OF A NEGATIVE MVA:
    
 
   
      Assume that on the date of surrender, the current rate (J) is 7% or .07.
    
 
   
                                          N/12
                         1 + l
 The MVA factor = (    ---------    )             -1
                      1 + J + .005
                                          24/12
                        1 + .05
                = (    ---------    )             -1
                     1 + .07 + .005
 
                = (.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
                         1 + l
 The MVA factor = (    ---------    )             -1
                      1 + J + .005
                                          24/12
                        1 + .05
                = (    ---------    )             -1
                     1 + .04 + .005
 
                = (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.
    
 
                                       77
<PAGE>
 
<TABLE>
 <S>                           <C>
                               SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
                               ANNUITY SERVICE MAILING ADDRESS:
                               C/O RETIREMENT PRODUCTS AND SERVICES
                               P.O. BOX 1024
                               BOSTON, MASSACHUSETTS 02103
 
                               TELEPHONE:
                               Toll Free (800) 752-7215
                               In Massachusetts (617) 348-9600
 
                               GENERAL DISTRIBUTOR
                               Clarendon Insurance Agency, Inc.
                               One Sun Life Executive Park
                               Wellesley Hills, Massachusetts 02481
 
                               AUDITORS
                               Deloitte Touche LLP
                               125 Summer Street
                               Boston, Massachusetts 02110
</TABLE>
 
   
REG-1 5/99
    

<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         Form of Underwriting Agreement         *
 3(a)      Certificate of Incorporation          **
 3(b)      By-laws                               **
 4(a)      Single Payment Combination 
             Fixed/Variable Group Annuity
             Contract                            ***
 4(b)      Certificate to be used in con-
             nection with Contract filed as
             Exhibit 4(a)                        ***
23         Independent Auditors' Consent         Filed Herewith
24         Powers of Attorney                    Filed Herewith

*      Incorporated herein by reference from Pre-Effective Amendment No. 1 
       to the Registration Statement on Form N-4, File No. 333-37907, filed 
       on January 16, 1998.

**     Incorporated herein by reference from the Registration Statement on 
       Form N-4, File No. 333-37907, filed on October 14, 1997.

***    Incorporated herein by reference from  Post-effective Amendment No. 9 
       to the Registration Statement on Form N-4, File No. 33-29852, filed on 
       April 16, 1998.


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.
   
    
    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. 8 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 Hills, 
Commonwealth of Massachusetts, on the 30th day of April, 1999.
    

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


                                  By:     /s/ C. JAMES PRIEUR
                                       -------------------------  
                                              C. James Prieur
                                              President
    

   
    Pursuant to the requirements of the Securities Act of 1933, this 
Post-Effective Amendment No. 8 to the Registration Statement has been signed by
the following persons in the capacities and on the dates indicated.
    
   
    SIGNATURE                           TITLE                    DATE    



   /s/ C. JAMES PRIEUR            President and Director
- --------------------------     (Principal Executive Officer)  April 30, 1999
   C. James Prieur
 
   /s/  ROBERT P. VROLYK        Vice President, Finance and 
- ----------------------------    Actuary (Principal Financial
     Robert P. Vrolyk              & Accounting Officer)      April 30, 1999

*  /s/  DONALD A. STEWART          Chairman and Director      April 30, 1999
- -------------------------------
      Donald A. Stewart

*  /s/ RICHARD B. BAILEY                Director              April 30, 1999
- ----------------------------
     Richard B. Bailey

- --------------------
* By Edward M. Shea pursuant to Power of Attorney filed herewith.
    

                                     II-5

<PAGE>
   
    SIGNATURE                           TITLE                    DATE    




*   /s/ M. COLYER CRUM                    Director
- -------------------------------                             April 30, 1999
       M. Colyer Crum


*   /s/ DAVID D. HORN                     Director
- --------------------------------                            April 30, 1999
        David D. Horn              

*   /s/ JOHN S. LANE                      Director          April 30, 1999
- --------------------------------
        John S. Lane

*   /s/ ANGUS A. MacNAUGHTON              Director          April 30, 1999
- ---------------------------------
     Angus A. MacNaughton

*  /s/  JOHN D. MCNEIL                    Director          April 30, 1999
- ---------------------------------
        John D. McNeil           

*  /s/  S. CAESAR RABOY                   Director          April 30, 1999
- ---------------------------------    
        S. Caesar Raboy           

- -----------------------
* By Edward M. Shea pursuant to Power of Attorney filed herewith.
    

                                     II-6

<PAGE>
                                  EXHIBIT INDEX
Exhibit
Number                                              Page

23       Independent Auditors' Consent.............  
24       Powers of Attorney........................    



                                  II-7



<PAGE>

                                                Exhibit 23

                    INDEPENDENT AUDITORS' CONSENT


     We consent to the use in Post-Effective Amendment No. 8 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 5, 1999 accompanying 
the statutory 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 5, 1999 appearing in the Annual Report on Form 10-K of Sun Life 
Assurance Company of Canada (U.S.) for the year ended December 31, 1998.

     We also consent to the references to us under the headings "Condensed 
Financial Information - Accumulation Unit Values" and "Accountants" in such 
Prospectus.

DELOITTE & TOUCHE LLP
Boston, Massachusetts

April 30, 1999




<PAGE>

                    SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)

                                 POWER OF ATTORNEY


    KNOW ALL MEN BY THESE PRESENTS that John D. McNeil, whose signature 
appears below, constitutes and appoints Edward M. Shea, Ellen B. King, Peter 
F. Demuth and C. James Prieur, and each of them, his attorneys-in-fact, each 
with the power of substitution, for him in any and all capacities, to sign a 
Registration Statement on Form S-2 of Sun Life Assurance Company of Canada 
(U.S.) (Reg. No. 33-41852), and any amendments thereto, and to file the same, 
with exhibits thereto, and other documents in connection therewith, with the 
Securities and Exchange Commission, hereby ratifying and confirming all that 
each of said attorneys-in-fact or his substitute or substitutes, may do or 
cause to be done by virtue hereof.

                                            /s/ JOHN D. MCNEIL
                                            --------------------
                                              John D. McNeil


February 4, 1999







<PAGE>

                    SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)

                                 POWER OF ATTORNEY


    KNOW ALL MEN BY THESE PRESENTS that John S. Lane, whose signature appears 
below, constitutes and appoints Edward M. Shea, Ellen B. King, Peter F. 
Demuth and C. James Prieur, and each of them, his attorneys-in-fact, each 
with the power of substitution, for him in any and all capacities, to sign a 
Registration Statement on Form S-2 of Sun Life Assurance Company of Canada 
(U.S.) (Reg. No. 33-41852), and any amendments thereto, and to file the same, 
with exhibits thereto, and other documents in connection therewith, with the 
Securities and Exchange Commission, hereby ratifying and confirming all that 
each of said attorneys-in-fact or his substitute or substitutes, may do or 
cause to be done by virtue hereof.

                                            /s/ JOHN S. LANE
                                            --------------------
                                              John S. Lane


February 4, 1999






<PAGE>

                    SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)

                                 POWER OF ATTORNEY


    KNOW ALL MEN BY THESE PRESENTS that Donald A. Stewart, whose signature 
appears below, constitutes and appoints Edward M. Shea, Ellen B. King, Peter 
F. Demuth and C. James Prieur, and each of them, his attorneys-in-fact, each 
with the power of substitution, for him in any and all capacities, to sign a 
Registration Statement on Form S-2 of Sun Life Assurance Company of Canada 
(U.S.) (Reg. No. 33-41852), and any amendments thereto, and to file the same, 
with exhibits thereto, and other documents in connection therewith, with the 
Securities and Exchange Commission, hereby ratifying and confirming all that 
each of said attorneys-in-fact or his substitute or substitutes, may do or 
cause to be done by virtue hereof.

                                            /s/ DONALD A. STEWART
                                            ---------------------
                                              Donald A. Stewart


February 4, 1999






<PAGE>

                    SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)

                                 POWER OF ATTORNEY


    KNOW ALL MEN BY THESE PRESENTS that Angus A. MacNaughton, whose signature 
appears below, constitutes and appoints Edward M. Shea, Ellen B. King, Peter 
F. Demuth and C. James Prieur, and each of them, his attorneys-in-fact, each 
with the power of substitution, for him in any and all capacities, to sign a 
Registration Statement on Form S-2 of Sun Life Assurance Company of Canada 
(U.S.) (Reg. No. 33-41852), and any amendments thereto, and to file the same, 
with exhibits thereto, and other documents in connection therewith, with the 
Securities and Exchange Commission, hereby ratifying and confirming all that 
each of said attorneys-in-fact or his substitute or substitutes, may do or 
cause to be done by virtue hereof.

                                            /s/ ANGUS A. MACNAUGHTON
                                            -------------------------
                                              Angus A. MacNaughton


February 4, 1999






<PAGE>

                    SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)

                                 POWER OF ATTORNEY


    KNOW ALL MEN BY THESE PRESENTS that S. Caesar Raboy, whose signature 
appears below, constitutes and appoints Edward M. Shea, Ellen B. King, Peter 
F. Demuth and C. James Prieur, and each of them, his attorneys-in-fact, each 
with the power of substitution, for him in any and all capacities, to sign a 
Registration Statement on Form S-2 of Sun Life Assurance Company of Canada 
(U.S.) (Reg. No. 33-41852), and any amendments thereto, and to file the same, 
with exhibits thereto, and other documents in connection therewith, with the 
Securities and Exchange Commission, hereby ratifying and confirming all that 
each of said attorneys-in-fact or his substitute or substitutes, may do or 
cause to be done by virtue hereof.

                                            /s/ S. CAESAR RABOY
                                            --------------------
                                              S. Caesar Raboy


February 4, 1999






<PAGE>

                    SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)

                                 POWER OF ATTORNEY


    KNOW ALL MEN BY THESE PRESENTS that M. Colyer Crum, whose signature 
appears below, constitutes and appoints Edward M. Shea, Ellen B. King, Peter 
F. Demuth and C. James Prieur, and each of them, his attorneys-in-fact, each 
with the power of substitution, for him in any and all capacities, to sign a 
Registration Statement on Form S-2 of Sun Life Assurance Company of Canada 
(U.S.) (Reg. No. 33-41852), and any amendments thereto, and to file the same, 
with exhibits thereto, and other documents in connection therewith, with the 
Securities and Exchange Commission, hereby ratifying and confirming all that 
each of said attorneys-in-fact or his substitute or substitutes, may do or 
cause to be done by virtue hereof.

                                            /s/ M. COLYER CRUM
                                            --------------------
                                              M. Colyer Crum


February 4, 1999






<PAGE>

                    SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)

                                 POWER OF ATTORNEY


    KNOW ALL MEN BY THESE PRESENTS that David D. Horn, whose signature 
appears below, constitutes and appoints Edward M. Shea, Ellen B. King, Peter 
F. Demuth and C. James Prieur, and each of them, his attorneys-in-fact, each 
with the power of substitution, for him in any and all capacities, to sign a 
Registration Statement on Form S-2 of Sun Life Assurance Company of Canada 
(U.S.) (Reg. No. 33-41852), and any amendments thereto, and to file the same, 
with exhibits thereto, and other documents in connection therewith, with the 
Securities and Exchange Commission, hereby ratifying and confirming all that 
each of said attorneys-in-fact or his substitute or substitutes, may do or 
cause to be done by virtue hereof.

                                            /s/ DAVID D. HORN
                                            --------------------
                                              David D. Horn


February 4, 1999






<PAGE>

                    SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)

                                 POWER OF ATTORNEY


    KNOW ALL MEN BY THESE PRESENTS that Richard B. Bailey, whose signature 
appears below, constitutes and appoints Edward M. Shea, Ellen B. King, Peter 
F. Demuth and C. James Prieur, and each of them, his attorneys-in-fact, each 
with the power of substitution, for him in any and all capacities, to sign a 
Registration Statement on Form S-2 of Sun Life Assurance Company of Canada 
(U.S.) (Reg. No. 33-41852), and any amendments thereto, and to file the same, 
with exhibits thereto, and other documents in connection therewith, with the 
Securities and Exchange Commission, hereby ratifying and confirming all that 
each of said attorneys-in-fact or his substitute or substitutes, may do or 
cause to be done by virtue hereof.

                                            /s/ RICHARD B. BAILEY
                                            --------------------
                                              Richard B. Bailey


February 4, 1999








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