PRINCIPAL MUTUAL LIFE INSURANCE COMPANY SEPARATE ACCOUNT B
485APOS, 1998-02-26
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                                                       Registration No. 02-78001


                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                                    FORM N-4


             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                     Pre-Effective Amendment No.  ______ _____

                     Post-Effective Amendment No. __19__ __X__

                                     and/or


         REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940

                             Amendment No. __15__ _____

                        (Check appropriate box or boxes)

           Principal Mutual Life Insurance Company Separate Account B
- --------------------------------------------------------------------------------
                           (Exact Name of Registrant)

                     Principal Mutual Life Insurance Company
- --------------------------------------------------------------------------------
                               (Name of Depositor)

              The Principal Financial Group, Des Moines, Iowa          50392
- --------------------------------------------------------------------------------
        (Address of Depositor's Principal Executive Offices)          (Zip Code)

Depositor's Telephone Number, including Area Code   (515) 248-3842

         M. D. Roughton, The Principal Financial Group Des Moines, Iowa  50392
- --------------------------------------------------------------------------------
                     (Name and Address of Agent for Service)


It is proposed that this filing will become effective (check appropriate box)

        ___   immediately upon filing pursuant to paragraph (b) of Rule 485

        ___   on (date) pursuant to paragraph (b) of Rule 485

        ___   60 days after filing pursuant to paragraph (a)(1) of Rule 485

        _X_   on May 1, 1998 pursuant to paragraph (a)(1) of Rule 485

        ___   75 days after filing pursuant to paragraph (a)(2) of Rule 485

        ___   on (date) pursuant to paragraph (a)(2) of Rule 485

              If appropriate, check the following box:

        ___   This post-effective  amendment designates a new effective date for
              a previously filed post- effective amendment.
<PAGE>

           PRINCIPAL MUTUAL LIFE INSURANCE COMPANY SEPARATE ACCOUNT B
               PENSION BUILDER - GROUP VARIABLE ANNUITY CONTRACTS
                       FOR TAX-DEFERRED RETIREMENT PLANS

                       Registration Statement on Form N-4
                              Cross Reference Sheet

Form N-4 Item                              Caption in Prospectus

Part A

 1. Cover Page                          Principal Mutual Life Insurance
                                          Company Separate Account B
                                          Pension Builder - Group
                                          Variable Annuity Contracts
                                          For Tax-Deferred Retirement Plans
 2. Definitions                         Glossary of Special Terms
 3. Synopsis                            Summary, Expense Table, Example
 4. Condensed Financial Information     Condensed Financial Information
 5. General Description of Registrant,  Summary, Introduction, Description of
    Depositor, and Portfolio Companies    Principal Mutual Life Insurance
                                          Company, Principal Mutual Life
                                          Insurance Company Separate Account
                                          B, Voting Rights
 6. Deductions                          Summary, Deductions Under the Contracts,
                                          Contingent Deferred Sales Charge,
                                          Administration Charge, Separate
                                          Payment of Administration Charge,
                                          Mortality and Expense Risks Charge,
                                          Premium Taxes, Distribution of These
                                          Contracts
 7. General Description of Variable     Summary, The Contract, Contract Values
    Annuity Contracts                     and Accounting Before Annuity
                                          Commencement Date, Annuity Benefits,
                                          Payment on Death of Participant,
                                          Withdrawals and Transfers, Other
                                          Contractual Provisions, 
                                          Contractowners' Inquiries
 8. Annuity Period                      Annuity Benefits
 9. Death Benefit                       Payment on Death of Participant,
                                          Federal Tax Status
10. Purchases and Contract Value        Summary, Introduction, The Contract,
                                          Contract Values and Accounting Before
                                          Annuity Commencement Date, Other
                                          Contractual Provisions, Distribution
                                          of These Contracts
11. Redemptions                         Summary, Introduction, Annuity Benefits,
                                          Withdrawals and Transfers
12. Taxes                               Summary, Introduction, Annuity Benefits,
                                          Federal Tax Status
13. Legal Proceedings                   Legal Proceedings
14. Table of Contents of the State-     Table of Contents of the Statement
    ment of Additional Information        of Additional Information

Part B                                  Statement of Additional Information
                                        Caption**

15. Cover Page                          Principal Mutual Life Insurance
                                          Company Separate Account B
                                          Pension Builder-Group Variable Annuity
                                          Contracts Issued By Principal Mutual
                                          Life Insurance Company
16. Table of Contents                   Table of Contents
17. General Information and History     General Information and History
18. Services                            Independent Auditors
19. Purchase of Securities Being        Deductions Under the Contracts**,
    Offered                               Summary**, Withdrawals and
                                          Transfers**, Distribution of These 
                                          Contracts**
20. Underwriters                        Summary**, Distribution of These
                                          Contracts**, Underwriting Commissions
21. Calculation of Performance Data     Calculation of Yield and Total Return
22. Annuity Payments                    Annuity Benefits**
23. Financial Statements                Financial Statements

** Prospectus caption given where appropriate.


                     PRINCIPAL MUTUAL LIFE INSURANCE COMPANY

                               SEPARATE ACCOUNT B

               PENSION BUILDER -- GROUP VARIABLE ANNUITY CONTRACTS

                        FOR TAX-DEFERRED RETIREMENT PLANS


        Issued by Principal Mutual Life Insurance Company (the "Company")

   
                    Prospectus dated ________________________
    

     This Prospectus  concisely sets forth  information  about Principal  Mutual
Life  Insurance  Company  Separate  Account B, Pension  Builder  Group  Variable
Annuity  Contracts (the "Contract" or the "Contracts") that an investor ought to
know before investing. It should be read and retained for future reference.

   
     Additional  information  about the  Contracts,  including  a  Statement  of
Additional  Information,  dated  _________________,  has  been  filed  with  the
Securities and Exchange Commission.  The Statement of Additional  Information is
incorporated  by reference  into this  Prospectus.  The table of contents of the
Statement of Additional  Information  appears on page 23 of this  Prospectus.  A
copy of the Statement of Additional Information can be obtained, free of charge,
upon request by writing or telephoning:
    


                     Princor Financial Services Corporation
                                   a Member of
                          The Principal Financial Group
                            Des Moines, IA 50392-0200
                            Telephone: 1-800-247-9988



THESE  SECURITIES  HAVE NOT BEEN APPROVED OR  DISAPPROVED  BY THE SECURITIES AND
EXCHANGE  COMMISSION OR ANY STATE  SECURITIES  COMMISSION NOR HAS THE SECURITIES
AND  EXCHANGE  COMMISSION  OR ANY STATE  SECURITIES  COMMISSION  PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.



     This  Prospectus is valid only when  accompanied by the current  prospectus
for Principal Variable  Contracts Fund, Inc. These  prospectuses  should be kept
for future reference.

   
                                TABLE OF CONTENTS

                                                                            Page
Glossary of Special Terms ...................................................  3
Expense Table ...............................................................  5
Example......................................................................  6
Summary  ....................................................................  6
Condensed Financial Information .............................................  6
Introduction ................................................................  8
Description of Principal Mutual Life Insurance Company ......................  9
Principal Mutual Life Insurance Company Separate Account B .................. 10
Deductions under the Contracts .............................................. 10
     Contingent Deferred Sales Charge........................................ 11
     Administration Charge .................................................. 11
     Separate Payment of Administration Charge .............................. 12
     Mortality and Expense Risks Charge ..................................... 12
     Premium Taxes .......................................................... 12
Surplus Distribution at Sole Discretion of the Company ...................... 12
The Contract  ............................................................... 13
     Contract Values and Accounting Before Annuity Commencement Date ........ 13
         Participant's Investment Accounts .................................. 13
         Unit Value ......................................................... 13
         Net Investment Factor .............................................. 13
         Hypothetical Example of Calculation of Unit Value for the
              Capital Accumulation Division and Government Securities 
              Division....................................................... 14
         Hypothetical Example of Calculation of Unit Value for
               the Money Market Division..................................... 14
      Annuity Benefits ...................................................... 14
         Selecting a Variable Annuity ....................................... 14
         Forms of Variable Annuities ........................................ 15
         Basis of Annuity Conversion Rates .................................. 16
         Determining the Amount of the First Monthly Annuity Payment ........ 16
         Determining the Amount of the Second and Subsequent
              Monthly Annuity Payments ...................................... 16
         Hypothetical Example of Calculation of Annuity Payments ............ 17
     Payment on Death of Participant ........................................ 17
         Prior to Annuity Commencement Date ................................. 17
         Subsequent to Annuity Commencement Date ............................ 18
     Withdrawals and Transfers .............................................. 18
         Cash Withdrawals ................................................... 18
         Transfers to the Contract .......................................... 18
         Transfers Between Divisions ........................................ 18
         Transfers to the Associated Fixed Contract ......................... 19
         Special Situation Involving Alternate Funding Agents ............... 19
         Postponement of Cash Withdrawal or Transfer ........................ 19
     Other Contractual Provisions ........................................... 19
         Contribution Limits ................................................ 19
         Assignment ......................................................... 19
         Cessation of Contributions ......................................... 20
         Limitation as to Participants....................................... 20
         Substitution of Securities.......................................... 20
         Changes in a Contract .............................................. 20
         Statement of Values................................................. 20
Distribution of these Contracts.............................................. 20
Voting Rights ............................................................... 20
Federal Tax Status........................................................... 21
State Regulation ............................................................ 22
                                                                            Page
Legal Opinions  ............................................................. 22
Legal Proceedings ........................................................... 22
Registration Statement....................................................... 22
Other Variable Annuity Contracts............................................. 22
Independent Auditors ........................................................ 22
Financial Statements......................................................... 23
Appendix 1  ................................................................. 23
Appendix 2  ................................................................. 23
Contractholders' Inquiries................................................... 23
Table of Contents of the Statement of Additional Information................. 23
    
     This  Prospectus  does not constitute an offer of, or  solicitation  of any
offer  to  acquire,  any  interest  or  participation  in the  Contracts  in any
jurisdiction in which such an offer or solicitation may not lawfully be made. No
person is authorized to give any information or to make any  representations  in
connection with the Contracts other than those contained in this Prospectus.


GLOSSARY OF SPECIAL TERMS

Administration  Charge -- A charge deducted once each Contribution Year prior to
the Annuity  Commencement Date from the Investment Accounts of each Participant,
either  on the last  day of the  Contribution  Year or the  date the  Investment
Accounts are applied or paid in full (a total redemption).

Annuity  Change  Factor -- The factor used to determine the change in value of a
Variable Annuity in the course of payment.

Annuity  Commencement  Date -- The  first  day of any  month  on  which  Annuity
Payments to a Participant begin, as provided by the Retirement Plan.

Annuity  Payments -- Periodic  payments  made to a  Participant  pursuant to the
annuity certificate issued to the Participant at the commencement of benefits.

Annuity Reserve Account -- The reserve held for Variable  Annuities in course of
payment in a Division of Separate Account B for these Contracts.

Associated  Fixed Contract -- Investment in the Fixed Account  option  available
for contracts issued pursuant to this prospectus.

Commuted  Value -- The dollar value,  as of a given date,  of remaining  Annuity
Payments.  It is  determined  by the Company  using the interest rate assumed in
determining  the initial  amount of monthly  income and assuming no variation in
the amount of monthly payments after the date of determination.

Compensation -- The amount derived from personal services which is includable in
the gross income of the Participant for the taxable year.

Contingent  Deferred  Sales  Charge -- The charge  deducted  from  certain  cash
withdrawals  from  a  Participant's   Investment  Accounts  before  the  Annuity
Commencement Date.

Contract--  Each contract  issued by the Company with any of the following  form
numbers: GP A 5921, GP A 5925 and GP A 5927.

Contractholder  -- The entity to which the Contract  will be issued,  which will
normally be an Employer, an association,  or a trust established for the benefit
of Participants and their beneficiaries.

Contribution--  Amounts  contributed  under  the  Contracts  by or on  behalf of
Participants  which are subject to Sections  403(b),  408 or 219 of the Internal
Revenue Code.

Contribution Year --

(a)  For  Individual   Retirement  Annuities  designed  for  ongoing  deductible
Contributions -- the taxable year of a Participant.

(b)  For Rollover  Individual  Retirement  Annuities -- the twelve-month  period
     commencing on the date the Participant's first Contribution is received and
     each twelve-month period thereafter.

(c) For Tax Deferred  Annuities -- the twelve-month  period which coincides with
the Plan Year.

Division  -- The part of  Separate  Account B which is  invested  in shares of a
series of a Mutual Fund.

Employer -- The person or entity which employs a Participant.  For an unemployed
Participant for whom Contributions are made by a spouse, the term Employer means
the person or entity which employs that spouse.  For a Participant  covered by a
Tax Deferred  Annuity  arrangement,  the term Employer means such  Participant's
employer which is either an organization  described in Section  501(c)(3) of the
Internal  Revenue  Code  or  which  is  a  public  school  or  other  agency  or
instrumentality  of a state or  political  subdivision  of a state  described in
Internal Revenue Code Sections 403(b) or 170(b)(1)(A)(ii) and which has made the
Tax Deferred Annuity arrangement available to its employees.

Fixed  Account -- Account to which  Contributions  may be allocated  which earns
guaranteed interest.

Individual  Retirement  Annuity--  A plan or program  adopted by or on behalf of
individuals pursuant to Section 408 of the Internal Revenue Code.

Internal  Revenue Code -- The Internal  Revenue  Code of 1954,  as amended,  and
regulations promulgated thereunder. Reference to the Internal Revenue Code means
such Internal  Revenue Code or the  corresponding  provisions of any  subsequent
revenue code and any regulations thereunder.

Investment Account -- An account  established under a Contract for a Participant
with respect to a Division of Separate Account B.

Investment  Account Value -- The value of an  Investment  Account on any date is
equal to the number of units then credited to such Investment Account multiplied
by the Unit Value for that Division for the Valuation  Period in which such date
occurs.

Mutual Fund -- The Principal  Variable  Contracts Fund, Inc., or shares of other
registered open-end investment companies substituted therefor.

Net  Investment  Factor -- The factor used to determine the change in Unit Value
during a Valuation Period.

Participant  -- A natural person for whom  Contributions  have been or are being
made under the Contract.

Plan Year -- For Tax Deferred  Annuities the  accounting  year of the Retirement
Plan. If the Retirement Plan does not have any accounting year, the Company will
establish a twelve-month period as the Plan Year.

Retirement  Plan -- A retirement  plan or program under which benefits are to be
provided to Participants pursuant to a Contract described herein.

Rollover  Individual  Retirement  Annuity -- An  Individual  Retirement  Annuity
designed for single premium rollover  Contributions pursuant to Internal Revenue
Code  Sections  402(a)(5),   402(a)(7),   403(a)(4),   403(b)(8),  408(d)(3)  or
409(b)(3)(c).

Separate Account B -- A separate  account  established by the Company under Iowa
law to receive  Contributions under the Contracts offered by this Prospectus and
other contracts issued by the Company.

Tax Deferred  Annuity-- A plan or program  adopted by public  school  systems or
other Employers pursuant to Section 403(b) of the Internal Revenue Code.

Total and Permanent  Disability  -- The condition of a Participant  when, as the
result of sickness or injury,  the participant is prevented from engaging in any
substantial  gainful  activity  and is eligible  for and  receiving a disability
benefit under Title II of the Federal Social Security Act.

Unit Value -- A measure used to determine the value of an Investment Account.

Valuation  Date -- The date as of which  the net  asset  value of a series  of a
Mutual Fund is determined.

Valuation  Period -- The period between the time as of which the net asset value
of a series of a Mutual Fund is determined on one Valuation Date and the time as
of which such value is determined on the next following Valuation Date.

Variable  Annuity -- A series of  periodic  payments,  the amounts of which will
increase  or  decrease to reflect  the  investment  experience  of a Division of
Separate Account B for the Contract.

Written Notification -- Actual delivery to the Company at its home office in Des
Moines,  Iowa of an  appropriate  writing on a form  supplied or approved by the
Company.

EXPENSE TABLE

     The following tables depict fees and expenses applicable to a Participant's
account  under  the  Contract.  The  purpose  of  the  table  is to  assist  the
contractowner   in   understanding   the  various  costs  and  expenses  that  a
contractowner  will bear directly or indirectly.  The table reflects expenses of
the  separate  account  as well as the  expenses  of the  accounts  in which the
separate account  invests.  In certain  circumstances,  state premium taxes will
also be applicable.  The example below should not be considered a representation
of past or future expenses;  actual expenses may be greater or lesser than those
shown. See "Deductions under the Contracts."


   Contractowner Transaction Expenses
     Sales Load Imposed on
       Purchases (as a percentage
       of purchase payments)                None
     Deferred Sales Load (as a
       percentage of amount
       surrendered)      
                         
                   For Withdrawals Occurring During Year:                     
      1    2      3     4     5      6     7     8      9   10   Thereafter   
      -    -      -     -     -      -     -     -      -   --   ----------   
     7%   6.3%   5.6%  4.9%  4.2%   3.5%  2.8%  2.1%   1.4%  .7%     0%       
                                                                              
     Surrender Fees                         None
     Exchange Fee                           None

   Annual Contract Fee    $25 plus an amount equal to the following:
- ----------------------
                                                  .5% of the First
                          Total Value of All   x  $50,000 of the Participant's
                                                  ------------------------------
                          Investment Accounts     Investment Accounts
                          of Participant          Total Value of all
                                                  Investment Accounts
                                                  of Participant (1)
   Separate Account Annual Expenses
     (as a percentage of average account
       value)
     Mortality and Expense Risk Fees    1.4965% (1.0001% for Rollover Individual
                                                Retirement Annuity)

     Account Fees and Expenses            None
                                       -------
     Total Separate Account Annual
         Expenses                      1.4965%

   Annual Expenses of Accounts
     (as a percentage of average net
       assets of the following accounts)

   
                           Capital         Government           Money
                        Value Account   Securities Account   Market Account
                        -------------   ------------------   --------------
   Management Fees         .46%               .50%              .50%
     Other Expenses        .01%               .02%              .05%
     Total Account
       Annual Expenses     .47%               .52%              .55% .
    

 (1) If Contributions for a Participant are made under the Contract as part of a
     Retirement   Plan  sponsored  by,  or  program  of,  the  Employer  of  the
     Participant   and  the  Company   receives  all  of  that  portion  of  the
     contributions  under such a plan or program  directed to annuity  contracts
     for  all  employees   participating  in  the  plan  or  program,  then  the
     denominator  will be the  aggregate  value of all the  accounts  of all the
     Participants of the Employer.
   
<TABLE>
<CAPTION>
                                                 EXAMPLE
                                                               1 Year    3 Years   5 Years   10 Years
                                                               ------    -------   -------   --------
<S>                                        <C>                  <C>       <C>        <C>        <C>
   If you surrender your contract at the   Capital Value
   end of the applicable time period:      Division             $97       $136       $178       $287

     You would pay the following           Government
     expenses on a $1,000 investment,      Securities
     assuming 5% annual return on          Division             $97       $138       $180       $292
     assets:
                                           Money Market
                                           Division             $97       $139       $182       $295

   If you annuitize at the end of the      Capital  Value
   applicable time period or do not        Division             $25        $76       $130       $278
                                ---
   surrender your contract:

     You would pay the following           Government
     expenses on a $1,000 investment,      Securities
     assuming 5% annual return on          Division             $25        $78       $133       $283
     assets:
                                           Money Market
                                           Division             $26        $78       $134       $286
</TABLE>
    
SUMMARY

How can I invest in a Contract?

     The Pension Builder Group variable annuity contracts (the "Contract" or the
"Contracts")  described in this  Prospectus  are designed for use in  connection
with tax-deferred Retirement Plans in the form of (1) Tax Deferred Annuity plans
or programs adopted by public school systems or other agencies of a state or its
subdivisions or certain tax exempt  organizations  pursuant to Section 403(b) of
the Internal Revenue Code of 1954, and (2) Individual  Retirement  Annuity plans
or programs  adopted pursuant to Section 408 of the Internal Revenue Code. These
Contracts are no longer  offered for sale.  They were sold  primarily by persons
who are  insurance  agents of or brokers for  Principal  Mutual  Life  Insurance
Company. In addition,  these persons will usually be registered  representatives
of Princor  Financial  Services  Corporation,  which acts as distributor for the
Contract. See "Distribution of these Contracts."

How can I withdraw my investment?

     Subject to any  Retirement  Plan  limitations  or any reduction for vesting
provided for in the Retirement Plan as to amounts available, the Participant may
withdraw  cash from the  Investment  Accounts  at any time prior to the  Annuity
Commencement Date subject to any charges that may be applied. Distributions from
Tax Deferred Annuities may begin only after the Participant  attains age 59 1/2,
separates  from service,  dies or becomes  disabled,  or incurs a hardship.  See
"Withdrawals and Transfers." Note that withdrawals before age 59 1/2 may involve
an income tax penalty. See "Federal Tax Status."

CONDENSED FINANCIAL INFORMATION

     Selected  data  for  a  Pension  Builder   accumulation   unit  outstanding
throughout the period ended December 31:

<TABLE>
<CAPTION>
                             Capital Value Division

                               Pension Builder --
                                     IRA/TSA

                              1997     1996     1995     1994     1993     1992     1991    1990     1989     1988
                              ----     ----     ----     ----     ----     ----     ----    ----     ----     ----
<S>                          <C>      <C>      <C>      <C>      <C>      <C>      <C>     <C>      <C>      <C>
   
Accumulation unit value:
   Beginning of period       $4.148   $3.409   $2.624   $2.650   $2.495   $2.313   $1.693  $ 1.907  $ 1.665   $ 1.477
   End of period              5.252    4.148    3.409    2.624    2.650    2.495    2.313    1.693    1.907     1.665

Number of accumulation        1,624    3,538    9,967   16,649   21,269   20,148   18,477   18,109   16,256    14,236
   units outstanding at end
   of period (in thousands)
</TABLE>
<TABLE>
<CAPTION>
                               Pension Builder --
                                  Rollover IRA

                              1997     1996     1995     1994     1993     1992     1991    1990     1989     1988
                              ----     ----     ----     ----     ----     ----     ----    ----     ----     ----
<S>                          <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>     <C>       <C>
Accumulation unit value:
   Beginning of period       $4.543   $3.715   $2.845   $2.859   $2.679   $2.471   $1.800   $2.017  $1.753    $1.547
   End of period              5.785    4.543    3.715    2.845    2.859    2.679    2.471    1.800   2.017     1.753

Number of accumulation          338      513    2,115    5,598    8,602    8,207    7,535    6,750   6,111     5,328
units outstanding at end
   of period (in thousands)
</TABLE>
<TABLE>
<CAPTION>
                         Government Securities Division

                                Pension Builder--
                                     IRA/TSA

                              1997     1996     1995     1994     1993     1992     1991    1990     1989     1988
                              ----     ----     ----     ----     ----     ----     ----    ----     ----     ----
<S>                          <C>      <C>      <C>      <C>      <C>      <C>      <C>     <C>      <C>      <C>
Accumulation unit value:
   Beginning of period       $1.875   $1.841   $1.570   $1.669   $1.539   $1.462   $1.269  $1.176   $1.032   $ .967
   End of period              2.039    1.875    1.841    1.570    1.669    1.539    1.462   1.269    1.176    1.032

Number of accumulation          630     1,178    3,738    5,947    7,432    6,200    4,912   3,732    2,782    2,115
units outstanding at end
   of period (in thousands)
</TABLE>
<TABLE>
<CAPTION>
                                            Pension Builder--
                                              Rollover IRA

                              1997     1996     1995     1994     1993     1992     1991    1990     1989     1988
                              ----     ----     ----     ----     ----     ----     ----    ----     ----     ----
<S>                          <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>     <C>      <C>
Accumulation unit value:
   Beginning of period       $1.968   $1.923   $1.631   $1.726   $1.584   $1.497   $1.293   $1.192  $1.041   $ .971
End of period                 2.150    1.968    1.923    1.631    1.726    1.584    1.497    1.293   1.192    1.041

Number of accumulation          192      399    1,772    4,117    7,878    5,933    4,602    3,356   2,086    1,369
   units outstanding at end
   of period (in thousands)
</TABLE>
<TABLE>
<CAPTION>
                              Money Market Division

                               Pension Builder --
                                     IRA/TSA

                              1997     1996     1995     1994     1993     1992     1991    1990     1989     1988
                              ----     ----     ----     ----     ----     ----     ----    ----     ----     ----
<S>                          <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>     <C>      <C>
Accumulation unit value:
   Beginning of period       $1.826   $1.764   $1.696   $1.659   $1.640   $1.608   $1.541   $1.448  $1.348   $ .276
End of period                 1.891    1.826    1.764    1.696    1.659    1.640    1.608    1.541   1.448    1.348

Number of accumulation          419      590    1,327    1,997    2,905    3,841    4,639    5,366   5,302    3,142
   units outstanding at end
   of period (in thousands)
</TABLE>
<TABLE>
<CAPTION>
                                Pension Builder--
                                  Rollover IRA

                              1997     1996     1995     1994     1993     1992     1991    1990     1989     1988
                              ----     ----     ----     ----     ----     ----     ----    ----     ----     ----
<S>                          <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>     <C>      <C>
Accumulation unit value:
   Beginning of period       $1.890   $1.817   $1.739   $1.692   $1.664   $1.624   $1.548   $1.447  $1.341   $ .263
   End of period              1.968    1.890    1.817    1.739    1.692    1.664    1.624    1.548   1.447    1.341


Number of accumulation           18       27      440    2,227    2,894    3,699    3,999    3,300   3,865    1,509
   units outstanding at end
   of period (in thousands)
</TABLE>
    
Financial statements are contained in the Statement of Additional Information.

INTRODUCTION

     The  Contracts  described  in  this  Prospectus  are  designed  for  use in
connection with  tax-deferred  Retirement  Plans in the form of (1) Tax Deferred
Annuity plans or programs  adopted by public school systems or other agencies of
a state or its  subdivisions  or certain  tax exempt  organizations  pursuant to
Section  403(b)  of the  Internal  Revenue  Code and (2)  Individual  Retirement
Annuity  plans or  programs  adopted  pursuant  to Section  408 of the  Internal
Revenue  Code.  The  Contracts  provide for the  accumulation  of values and the
payment of annuity benefits on a variable basis. A certificate is issued to each
Participant describing the benefits under the Contract.

     All  Contributions  for  Participants  are  allocated to one or more of the
Divisions of Separate  Account B. Currently there are three Divisions  available
to  Participants:  the Capital  Value  Division  (formerly  known as the Capital
Accumulation Division),  the Money Market Division and the Government Securities
Division.   Each  Participant  controls  the  allocation  by  filing  a  Written
Notification with the Company.

     Each of the  Divisions  invests  only in shares of an Account of  Principal
Variable Contracts Fund, Inc. (the "Fund") as indicated in the table below:

                   Division                            Account
                   --------                            -------
         Capital Value Division              Capital Value Account
         Government Securities Division      Government Securities Account
         Money Market Division               Money Market Account

   
     The  Investment  Manager for the Fund is Principal  Management  Corporation
(the  "Manager").  The Accounts are also used to fund  variable  life  insurance
contracts.  See  "Eligible  Purchasers  and  Purchase  of  Shares" in the Fund's
prospectus  for a  discussion  of the  potential  risks  associated  with "mixed
funding."
    

     The  investment  objective of Capital  Value  Account is long-term  capital
appreciation and growth of future investment  income. The assets of this Account
consist  principally  of  a  portfolio  of  common  stocks.  The  value  of  the
investments held by this Account fluctuates daily and is subject to the risks of
changing  economic  conditions  as well as the risks  inherent in the ability of
this Account's management to anticipate changes in such investments necessary to
meet changes in economic  conditions.  Historically,  the value of a diversified
portfolio of common stocks such as invested in by the Capital Value Account held
for an extended  period of time has tended to rise during  periods of inflation.
There has, however,  been no exact correlation,  and for some periods the values
of such common stocks declined while the rate of inflation increased.

     The Money Market Account has an investment  objective of obtaining  maximum
current income available from short-term securities consistent with preservation
of principal  and  maintenance  of liquidity by investing all of its assets in a
portfolio of money market  instruments.  This Account  invests in United  States
dollar  denominated  instruments  having a maturity of 397 days or less that the
Manager,  subject to the oversight of the Fund's board of directors,  determines
present  minimal credit risks and which at the time of acquisition are "Eligible
Securities" as that term is defined in  regulations  issued under the Investment
Company Act of 1940.  See the Fund's  prospectus  for details.  The value of the
investments held by this Account may fluctuate, although the net asset value per
share is normally expected to remain at $1.00. However, its yield will vary with
changes in short-term interest rates. Over the last two decades there has been a
general  correlation  between short-term  interest rates and the cost of living,
but there has been no exact  correlation  and for some  periods  such rates have
declined while the cost of living has risen.

     The  Government  Securities  Account has an investment  objective of a high
level of current income, liquidity and safety of principal. The Account seeks to
achieve this objective through the purchase of obligations  issued or guaranteed
by the United States Government or its agencies, with up to 55% of the Account's
assets invested in Government National Mortgage Association  Certificates ("GNMA
Certificates"). Account shares, however, are not guaranteed by the United States
Government.  The value of the Account's investments fluctuates as interest rates
change.  The value  rises when  rates  decline  and falls  when rates  increase.
Expected  prepayments of mortgages included in a GNMA certificate can affect the
market value of the  certificate,  and actual  prepayments can affect the return
ultimately received.

     Additional   information   concerning   these  Accounts,   including  their
investment policies and restrictions,  investment  management fees and operating
expenses is given in the  prospectus  for the Fund. A Prospectus for the Fund is
attached  to and  follows  this  Prospectus.  It  should  be read  carefully  in
conjunction with this Prospectus before investing.

     Each  Division  purchases  shares of the  Accounts at net asset  value.  In
addition,  all  distributions  made by an Account with respect to shares held by
Divisions of Separate Account B are reinvested in additional  shares of the same
Account.  Contract  benefits  are  provided  and  charges  are made in effect by
redeeming  Account shares at net asset value.  Values under the Contracts,  both
before and after the commencement of Annuity Payments, will increase or decrease
to reflect the investment  performance of the Accounts and  Participants  assume
the risks of such change in values.

     From  time to  time  the  Separate  Account  advertises  its  Money  Market
Division's  "yield"  and  "effective  yield."  Both yield  figures  are based on
historical  earnings and are not intended to indicate  future  performance.  The
"yield" of the division  refers to the income  generated by an investment in the
division  over  a  seven-day   period  (which  period  will  be  stated  in  the
advertisement).  This income is then "annualized." That is, the amount of income
generated by the  investment  during that week is assumed to be  generated  each
week over a 52-week period and is shown as a percentage of the  investment.  The
"effective  yield" is  calculated  similarly  but, when  annualized,  the income
earned by an  investment  in the  division  is  assumed  to be  reinvested.  The
"effective  yield"  will be  slightly  higher  than the  "yield"  because of the
compounding  effect  of  this  assumed  reinvestment.  Neither  yield  quotation
reflects sales load deducted from purchase  payments which,  if included,  would
reduce the "yield" and "effective yield."

     Also,  from time to time,  the Separate  Account will advertise the average
annual total return of its various  divisions.  The average  annual total return
for  any  of the  divisions  is  computed  by  calculating  the  average  annual
compounded  rate of return over the stated  period that would  equate an initial
$1,000 investment to the ending  redeemable  contract value. In this calculation
the ending value is reduced by a contingent deferred sales charge that decreases
from 7% to 0% over a period of 10 years. The Separate Account may also advertise
total return  figures of its Divisions  for a specified  period that do not take
into  account  the  sales  charge  in  order to  illustrate  the  change  in the
Division's  unit value over time.  See  "Deductions  Under the  Contracts" for a
discussion of contingent deferred sales charges.

     See  the  Statement  of  Additional  Information  for  further  information
regarding the computation of yield, effective yield and total return.

DESCRIPTION OF PRINCIPAL MUTUAL LIFE INSURANCE COMPANY (The "Company")

     Principal Mutual Life Insurance  Company is a mutual life insurance company
with its home office at The Principal  Financial Group, Des Moines,  Iowa 50392,
telephone number 515-247-5111.  It was originally incorporated under the laws of
the  State of Iowa in 1879 as  Bankers  Life  Association,  changed  its name to
Bankers  Life  Company in 1911 and  changed  its name to  Principal  Mutual Life
Insurance  Company in 1986. It is a member of The Principal  Financial  Group, a
diversified family of insurance and financial services corporations.

   
     The Board of Directors of the Company has approved a Plan of Reorganization
(the "Plan") pursuant to which the Company will adopt a mutual insurance holding
company structure.  The Plan was approved by the owners of annuity contracts and
life  insurance  policies  issued by the Company and has been  submitted  to the
Commissioner  of  Insurance of the State of Iowa (the "Iowa  Commissioner")  for
approval.

     Under the Plan, the Company will form a mutual  insurance  holding  company
named  "Principal  Mutual  Holding  Company"  and will  convert  to a stock life
insurance company. As part of such conversion,  the Company will change its name
to "Principal  Life Insurance  Company"  ("Principal  Life").  Principal  Mutual
Holding  Company will be the ultimate  parent company in the family of companies
known as the Principal Financial Group(R).

     Because  the  Company  currently  is  a  mutual  life  insurance   company,
Contractholders  have, in addition to contract  rights  related to the Contract,
certain membership interests in the Company, consisting principally of the right
to vote on the election of directors of the Company and on other matters and the
right to receive  distributions  of the Company's  surplus upon  liquidation  or
dissolution  of the Company.  The Plan will preserve but separate these contract
rights and  membership  interests.  Contract  rights will remain with  Principal
Life, and Contractholders on the date the Plan becomes effective (the "Effective
Date") will automatically become members of Principal Mutual Holding Company and
such Contractholder's  membership interests in the Company will be extinguished.
Under the terms of the Plan,  the  membership  interests of members of Principal
Mutual  Holding  Company  will consist  principally  of the right to vote on the
election of directors of Principal  Mutual Holding  Company and on other matters
and to receive  distributions of Principal Mutual Holding  Company's assets upon
liquidation or dissolution of Principal  Mutual Holding  Company.  The Plan will
not, in any way, increase premium payments or reduce Contract benefits,  values,
guarantees or other Contract obligations owed to Contractholders.

     The Company  believes  that adoption of the Plan will result in a corporate
structure that, among other things, will provide the Company with flexibility in
raising capital  through  various means that are not currently  available to it,
including stock offerings. Any initial offering of voting stock to third parties
will be subject to the approval of the Iowa Commissioner.  Although there are no
current plans to offer voting stock, in the event voting stock was sold to third
parties,  it is possible that the interests of such third party shareholders and
Contractholders could diverge on certain issues. The Company,  however, believes
that  such  shareholders  and  Contractholders  will  generally  have a  greater
commonality  of interests  than the  potential for conflict and will endeavor to
minimize the  occurrence  of such  conflicts and to operate the companies in the
best interests of all constituencies.

     The  Effective  Date  is  scheduled  to be  July  1,  1998,  but  the  Iowa
Commissioner  must first  approve the Plan.  In addition,  insurance  regulatory
authorities  in each state must issue an amendment to the Company's  Certificate
of Authority (to reflect the name change from  Principal  Mutual Life  Insurance
Company to Principal  Life  Insurance  Company) and must approve the forms which
support the Contract. Should the Effective Date be other than July 1, 1998 or if
states other than Iowa have not completed  action by that date, the Company will
notify existing Owners by supplementing this prospectus.

     Principal Mutual Life Insurance Company is authorized to do business in the
50 states of the United States,  the District of Columbia,  the  Commonwealth of
Puerto Rico, and the Canadian Provinces of Alberta, British Columbia,  Manitoba,
Ontario and Quebec. The Company offers a full range of products and services for
businesses, groups and individuals including individual insurance, pension plans
and group/employee  benefits. The Company has ranked in the upper one percent of
life  insurers  in assets  and  premium  income  and has  consistently  received
excellent  ratings from the major rating firms based upon the  Company's  claims
paying  ability.  As of December 31, 1997, the Company had $________  billion in
assets under management and served more than __________ million  individuals and
their families.
    

PRINCIPAL MUTUAL LIFE INSURANCE COMPANY SEPARATE ACCOUNT B

     Separate  Account B was  established  on January  12,  1970  pursuant  to a
resolution (as amended) of the Executive  Committee of the Board of Directors of
the Company.  Under Iowa insurance  laws and  regulations  the income,  gains or
losses,  whether or not  realized,  of  Separate  Account B are  credited  to or
charged  against  the assets of Separate  Account B without  regard to the other
income,  gains or losses of the  Company.  In  addition,  all  income,  gains or
losses,  whether or not  realized,  and  expenses  with respect to a Division of
Separate  Account B for these  Contracts shall be credited to or charged against
that  Division  without  regard to income,  gains or losses,  or expenses of any
other Division of Separate Account B.  Furthermore,  the assets of each Division
of Separate  Account B for these  Contracts  shall not be charged by the Company
with any liabilities  arising from any other contracts  issued by the Company or
from any other  Division  of  Separate  Account  B.  These  assets are held with
relation to the Contracts  described in this  Prospectus and such other variable
annuity   contracts  as  may  be  issued  by  the  Company  and   designated  as
participating in the various Divisions of Separate Account B. Also, although the
assets  maintained in Separate  Account B attributable to the Contracts will not
be charged with any liabilities  arising out of any other business  conducted by
the Company,  the reverse is not true. Hence, all obligations  arising under the
Contracts, including the promise to make Annuity Payments, are general corporate
obligations of the Company.

     Separate  Account B was registered on July 17, 1970 with the Securities and
Exchange  Commission as a unit investment trust under the Investment Company Act
of 1940,  as amended.  Such  registration  does not involve  supervision  by the
Commission of the investments or investment policies of Separate Account B.

     The Company is taxed as an insurance  company  under the  Internal  Revenue
Code. The operations of Separate  Account B are part of the total  operations of
the Company but are treated  separately for  accounting and financial  statement
purposes and are considered separately in computing the Company's tax liability.
Separate  Account B is not affected by federal  income taxes paid by the Company
with respect to its other operations, and under existing federal income tax law,
investment  income and capital gains  attributable to Separate Account B are not
taxed.  The Company reserves the right to charge Separate Account B with, and to
create a reserve for, any tax liability which the Company  determines may result
from maintenance of Separate Account B. To the best of the Company's  knowledge,
there is no current prospect of any such liability.

DEDUCTIONS UNDER THE CONTRACTS

   
     An  Administration  Charge,  a mortality  and expense  risks charge and, in
certain  circumstances,  state  premium  taxes are deducted  under the Contract.
Also,  in certain  circumstances,  a  Contingent  Deferred  Sales  Charge may be
deducted  from  certain  cash  withdrawals   from  a  Participant's   Investment
Account(s)  before  the  Annuity   Commencement  Date.  Total  expenses  of  the
Registrant for the fiscal year ended December 31, 1997 were  ___________% of the
average net assets.
    

     There  are also  deductions  from and  expenses  paid out of the  assets of
Capital Value Account,  Money Market Account, and Government Securities Account.
These are described in the Fund's prospectus.

A.   Contingent Deferred Sales Charge

     There is no initial sales charge.  However,  any cash withdrawal before the
     Annuity  Commencement  Date on behalf of a Participant  may be subject to a
     Contingent  Deferred Sales Charge equal to a percentage of the amount being
     withdrawn.  The  percentage  will be determined  according to the following
     table:

               Number of Contribution Years
                  A Participant Has Been             Contingent Deferred Sales
                Covered Under the Contract               Charge Percentage
               ----------------------------          -------------------------

                    Less than 1                                 7.0%
                    1 but less than 2                           6.3
                    2 but less than 3                           5.6
                    3 but less than 4                           4.9
                    4 but less than 5                           4.2
                    5 but less than 6                           3.5
                    6 but less than 7                           2.8
                    7 but less than 8                           2.1
                    8 but less than 9                           1.4
                    9 but less than 10                          0.7
                    10 or more                                  0.0

     The charge will be made by reducing the Investment Account Value from which
     the  withdrawal  is  made by an  amount  equal  to the  charge  (see  "Cash
     Withdrawals").

     The Contingent  Deferred Sales Charge does not apply to withdrawals made as
     a result of the Participant's death or Total and Permanent Disability.  The
     charge  also does not apply to  transfers  between  Investment  Accounts or
     transfers to an Associated  Fixed Contract or to amounts applied to provide
     Variable Annuity payments.  The charge may apply to amounts  transferred to
     an Alternate Funding Agent or Alternate  Funding Vehicle,  except transfers
     to an  Alternate  Funding  Vehicle  that is an annuity  contract  issued by
     Principal  Mutual Life Insurance  Company or an Alternate  Funding  Vehicle
     that  participates  in an  exchange  offer  for which an SEC order has been
     obtained.

     The amount of any Contingent  Deferred Sales Charge will never exceed 9% of
     the  purchase  payments  to which the  charge  relates.  For this  purpose,
     withdrawals will be related to purchase  payments on a first-in,  first-out
     basis and "purchase payments" will include purchase payments made under any
     Associated  Fixed  Contract  from  which  transfers  have  been  made.  See
     "Transfers to the Contract."

     The Contingent Deferred Sales Charge,  when applicable,  will be applied by
     the Company to unamortized  expenses  relating to the sale of the Contracts
     including but not limited to commissions paid to sales personnel, the costs
     of  preparation  of sales  literature and other  promotional  activity.  If
     revenues from the  Contingent  Deferred  Sales Charge are not sufficient to
     cover sales expenses,  the short fall could be viewed as being provided for
     out  of  other  revenues  or  the  Company's  surplus,  including  revenues
     attributable to the mortality and expense risks charge.

B.   Administration Charge

     An  Administration  Charge will be  deducted  once each  Contribution  Year
     proportionately  from the Investment  Accounts of each Participant and will
     be equal to the sum of 1. and 2.:

     1.  $25.

     2.  An amount  equal to a percentage  of the total value of all  Investment
         Accounts of the Participant  under the Contract.  This percentage shall
         be 0.5% of the first  $50,000  in such  accounts  divided  by the total
         value of such  accounts.  (See Appendix 2 for example of computation of
         Administration Charge.)

     Individual Retirement Annuities established under the Contract by a working
     and a  nonworking  spouse  Participant  will be  combined  for  purposes of
     calculating the Administration Charge.

     If Contributions for a Participant are made under the Contract as part of a
     Retirement   Plan  sponsored  by,  or  program  of,  the  Employer  of  the
     Participant   and  the  Company   receives  all  of  that  portion  of  the
     contributions  under such a plan or program  directed to annuity  contracts
     for all employees participating in the plan or program, then the percentage
     determined  in 2. above will be based on the value of the  aggregate of all
     accounts of all the Participants of the Employer. By this means, the charge
     determined by 2. will be deducted pro rata from the Investment  Accounts of
     all the Participants based on their proportionate value of the aggregate of
     the accounts.  The portion of the charge  determined by 1. will be deducted
     from Participant's Investment Accounts on a per capita basis.

     The  Administration  Charge applicable to each Participant will be deducted
     from the Participant's  Investment  Accounts on the earlier of (i) the date
     the accounts are paid or applied in full (a total  redemption)  or (ii) the
     last day of the  Contribution  Year.  The  deduction  will be  effected  by
     cancelling  a  number  of the  units  in  each  Investment  Account  of the
     Participant equal to its proportionate  share of the Administration  Charge
     divided by the Unit Value for the Contract for the applicable  Division for
     the Valuation Period in which the charge is made.

     A pro rata Administration  Charge will be made for any fractional part of a
     Contribution Year of a Participant.  The Company does not expect to recover
     from the charge any amount above its accumulated  expenses  associated with
     the Contracts. However, since a portion of the charge is based on a percent
     of a Participant's  Investment Account Values,  amounts derived from larger
     Investment Accounts may to an extent cover expenses associated with smaller
     Investment  Accounts  depending  upon the  relative  degree  of  Investment
     Account activity.

C.   Separate Payment of Administration Charge

     An Employer may, by a revocable written  agreement with the Company,  agree
     to  pay  separately  all or a  portion  of the  Administration  Charge  for
     Participants  who  are  employees  of the  Employer.  A  Participant  in an
     Individual  Retirement  Annuity (but not a Rollover  Individual  Retirement
     Annuity) may similarly  agree,  by a revocable  written  agreement with the
     Company, to pay separately all or a portion of the Administration Charge.

D.   Mortality and Expense Risks Charge

     Variable  Annuity  Payments  will  not be  affected  by  adverse  mortality
     experience or by any excess in the actual sales and administrative expenses
     over the charges  provided  for in the  Contract.  The Company  assumes the
     risks that (i) Annuity  Payments  will  continue  for a longer  period than
     anticipated   and  (ii)  the   deductions   under  the  Contracts  will  be
     insufficient  to cover the actual  costs.  For assuming  these  risks,  the
     Company, in determining Unit Values and Variable Annuity Payments,  makes a
     charge  as of the  end of each  Valuation  Period  against  the  assets  of
     Separate  Account  B held  with  respect  to the  Contract.  The  charge is
     equivalent  to a simple  annual  rate of  1.4965%  (1.0001%  for a Rollover
     Individual  Retirement  Annuity).  The Company  does not believe that it is
     possible to  specifically  identify  that portion of the 1.4965%  deduction
     applicable to the separate risks involved,  but estimates that a reasonable
     approximate  allocation would be .2490% for the mortality risks and 1.2475%
     (0.7511%  for a Rollover  Individual  Retirement  Annuity)  for the expense
     risks. The mortality and expense risks charge may be changed by the Company
     at any time at least one year after the  Contract has been issued by giving
     not less than 60 days prior written notice to the Contractholder,  Employer
     and  Participants.  However,  the charge may not exceed  2.00% on an annual
     basis, and only one change may be made in any one year period.  Further, no
     increase  in the  charge in excess of 1.75% on an annual  basis may be made
     without the prior approval of the Securities and Exchange  Commission.  Any
     change in the mortality  and expense risks charge will not affect  Variable
     Annuities in the course of payment.  If the charge is insufficient to cover
     the actual costs of the mortality and expense risks assumed,  the financial
     loss will fall on the Company;  conversely,  if the charge proves more than
     sufficient, the excess will be a gain to the Company.

E.   Premium Taxes

     Certain  state and local  governments  impose a  premium  tax upon  annuity
     considerations  received by  insurance  companies.  The Company will charge
     against  the  Participant's  Investment  Account  Values  the amount of any
     premium  taxes levied by a state or any other  government  entity.  Premium
     taxes currently imposed by states range from 0% (in more than 40 states) to
     2.25%. (See Appendix 1 for premium tax rates.) Unless otherwise required by
     law, the deduction will be made at the time  Investment  Account Values are
     applied to effect the form of variable annuity selected by the Participant.

     The applicable rates imposed by the states and other governmental  entities
     which impose premium taxes on annuity  considerations  are subject to being
     changed or amended by the respective  legislative body or by administrative
     interpretations  or by  judicial  acts.  IT IS  NOT  POSSIBLE  TO  DESCRIBE
     PRECISELY  THE AMOUNT OF PREMIUM TAX PAYABLE ON ANY  TRANSACTION  INVOLVING
     THE CONTRACTS.  Such premium taxes will depend,  among other things, on the
     state of residence of the  Participant  and the  insurance tax laws of such
     states.

SURPLUS DISTRIBUTION AT SOLE DISCRETION OF THE COMPANY

     It is not anticipated that any divisible surplus will ever be distributable
to these  Contracts  in the future  because the  Contracts  are not  expected to
result in a contribution to the divisible  surplus of the Company.  However,  if
any distribution of divisible  surplus is made, it will be made to Participants'
Investment Accounts in the form of additional units.

THE CONTRACT

     The Contract  will  normally be issued to an Employer or  association  or a
trust established for the benefit of Participants and their  beneficiaries.  The
Company  will  also  issue a  pre-retirement  certificate  to  each  Participant
describing  the benefits  under the Contract.  If the Company Home Office in Des
Moines, Iowa receives and accepts a completed application for a Contract with or
before the initial purchase  payment,  it will,  within two days after receiving
that  payment,  invest the entire  amount in the Division or Divisions  that are
chosen.  (If no Division is chosen on the completed  application for a Contract,
the Company will invest the entire amount in the Money Market  Division.) If the
application  for the purchase of a Contract is not received and accepted  within
five business days after the Company receives the initial purchase payment,  the
Company will return the  payment.  If the  application  is received and accepted
within the  five-day  period,  that  payment will be invested in the Division or
Divisions  of  choice  at the Unit  Value or Values  next  calculated  after the
application has been accepted.

A.   Contract Values and Accounting Before Annuity Commencement Date

     1.  Participant's Investment Accounts

         During the period of time before the commencement of Annuity  Payments,
         an Investment Account will be established for each Participant for each
         type of Contribution  permitted under the Contract for each Division of
         Separate   Account  B.  For  Tax  Deferred   Annuities   the  types  of
         Contributions  are  Contributions by the Employer  pursuant to a salary
         modification   agreement,   other  Employer   Contributions   or  other
         Contributions that the Company agrees to accept.

         For Individual  Retirement  Annuities,  the types of Contributions  are
         generally Employer Contributions, Participant Contributions or rollover
         Contributions   arising  from  amounts   previously   deducted  by  the
         Participant  and  accumulated  under  an  account,  annuity  or bond as
         provided for in Internal Revenue Code Sections 408 or 409.

         For Rollover Individual Retirement  Annuities,  generally the only type
         of Contribution is a rollover Contribution pursuant to Internal Revenue
         Code Sections 402(a)(5),  402(a)(7), 403(a)(4), 403(b)(8), 408(d)(3) or
         409(b)(3)(C).

         Investment  Accounts will be maintained  until the  Investment  Account
         Values are either (a) applied to effect Variable  Annuity  benefits for
         the   Participant,   (b)  paid  to  the  Participant  or  Participant's
         beneficiary or (c) transferred in accordance with the provisions of the
         Contract.

         Each  Contribution  for a Participant will be allocated to the Division
         or Divisions of Separate  Account B designated by Written  Notification
         and will  result  in a credit  of units to the  appropriate  Investment
         Account. The number of units so credited will be determined by dividing
         the portion of the  Contributions  allocated  to a Division by the Unit
         Value for that  Division  for the  Valuation  Period  within  which the
         Contribution  was  received  by the  Company at its home  office in Des
         Moines, Iowa.

     2.  Unit Value

         The Unit  Value for a Contract  which  participates  in a  Division  of
         Separate  Account  B  determines  a  Participant's  Investment  Account
         Values. The Unit Value for each Contract in each Division is determined
         on each day on which the net asset value of its  underlying  Account is
         determined.  The Unit Value for a Valuation  Period is determined as of
         the end of that period.  The  investment  performance of the underlying
         Account and deducted expenses affect the Unit Value.

         For these  Contracts,  the Unit  Value for each  Division  was fixed at
         $1.00 for the  Valuation  Period in which the first amount of money was
         credited  to the  Division.  A  Division's  Unit  Value  for any  later
         Valuation  Period  is  equal  to its  Unit  Value  for the  immediately
         preceding Valuation Period multiplied by the Net Investment Factor (see
         below) for that Division for the later Valuation Period.

     3.  Net Investment Factor

         Each  Net  Investment  Factor  is  the  quantitative   measure  of  the
         investment performance of each Division of Separate Account B.

         For any  specified  Valuation  period the Net  Investment  Factor for a
         Division for a Contract is equal to

         (a)  the  quotient  obtained by  dividing  (i) the net asset value of a
              share of the  underlying  Account  as of the end of the  Valuation
              Period,  plus  the per  share  amount  of any  dividend  or  other
              distribution made by the Account during the Valuation Period (less
              an adjustment for taxes,  if any) by (ii) the net asset value of a
              share of the  Account as of the end of the  immediately  preceding
              Valuation Period,

                                   reduced by

         (b)  a mortality and expense risks charge of a number equal to a simple
              interest rate for the number of days within the  Valuation  Period
              at an annual rate of 1.4965%  (1.0001%  for a Rollover  Individual
              Retirement Annuity).

         The amounts  derived from applying the rate  specified in  subparagraph
         (b) above and the amount of any taxes referred to in  subparagraph  (a)
         above  will be  accrued  daily and will be  transferred  from  Separate
         Account B at the discretion of the Company.

     4.  Hypothetical Example of Calculation of Unit Value for the Capital Value
         Division  and  Government   Securities   Division  (excluding  Rollover
         Individual Retirement Annuity)

         The  computation  of the Unit Value may be illustrated by the following
         hypothetical  example.  Assume  that the  current net asset value of an
         Account  share is  $14.8000;  that  there  were no  dividends  or other
         distributions made by the Account and no adjustment for taxes since the
         last  determination;  that the net asset value of an Account share last
         determined was $14.7800;  that the last Unit Value was $1.0185363;  and
         that the  Valuation  Period was one day. To  determine  the current Net
         Investment Factor, divide $14.8000 by $14.7800 which produces 1.0013532
         and deduct from this amount the  mortality  and expense risks charge of
         0.0000410, which is the rate for one day that is equivalent to a simple
         annual  rate of  1.4965%.  The  result,  1.0013122,  is the current Net
         Investment  Factor. The last Unit Value ($1.0185363) is then multiplied
         by the current  Net  Investment  Factor  (1.0013122)  which  produces a
         current Unit Value of $1.0198728.

     5.  Hypothetical  Example of Calculation of Unit Value for the Money Market
         Division (excluding Rollover Individual Retirement Annuity)

         The  computation  of the Unit Value may be illustrated by the following
         hypothetical  example.  Assume  that the  current net asset value of an
         Account share is $1.0000;  that a dividend of .0328767  cents per share
         was declared by the Account prior to calculation of the net asset value
         of the Account share and that no other  distributions and no adjustment
         for taxes  were made since the last  determination;  that the net asset
         value of an Account share last  determined  was $1.0000;  that the last
         Unit Value was $1.0162734; and that the Valuation Period was one day.

         To determine  the current Net  Investment  Factor,  add the current net
         asset value ($1.0000) to the amount of the dividend  ($.000328767)  and
         divide by the last net asset  value  ($1.0000),  which when  rounded to
         seven places  equals  1.0003288.  Deduct from this amount the mortality
         and expense  risks charge of .0000410 (the  proportionate  rate for one
         day based on a simple annual rate of 1.4965%).  The result  (1.0002878)
         is the current Net Investment  Factor. The last Unit Value ($1.0162734)
         is then  multiplied by the current Net Investment  Factor  (1.0002878),
         resulting in a current Unit Value of $1.0165659.

B.   Annuity Benefits

     1.  Selecting a Variable Annuity

         Variable  Annuity  Payments will be made to a Participant  beginning on
         the Annuity  Commencement  Date and continuing  thereafter on the first
         day of each month.  A  Participant  may select an Annuity  Commencement
         Date by Written  Notification to the Company.  The date selected may be
         the first day of any month the Plan allows  which is at least one month
         after the Written  Notification.  For  Participants  in a Tax  Deferred
         Annuity,  after 1988, the annuity commencement date cannot begin before
         the  participant is age 59 1/2,  separated from service,  or is totally
         disabled.

         As a general rule the annuity  commencement  for Individual  Retirement
         Annuities  and Tax Deferred  Annuities  cannot be later than April 1 of
         the calendar year following the calendar year in which the  Participant
         attains age 70 1/2. Participants in Individual Retirement Annuities may
         delay  the  commencement  date if they  notify us in  writing  that the
         distribution  requirements  are being met by  distributions  from other
         individual retirement arrangements. Tax Deferred Annuity benefits which
         accrued before January 1, 1987 do not have to be distributed  until age
         75 or the first day of the month after termination of employment.

         At any time not less  than one  month  preceding  the  desired  Annuity
         Commencement Date, a Participant may, by Written  Notification,  select
         one of the  annuity  options  described  below (see  "Forms of Variable
         Annuities").  If no annuity option has been selected at least one month
         before the Annuity  Commencement  Date, and if the Retirement Plan does
         not provide  one,  payments to an  unmarried  Participant  will be made
         under the annuity option  providing  Variable Life Annuity with Monthly
         Payments  Certain for Ten Years,  i.e.  providing  monthly payments for
         life with the provision that if the Participant dies prior to receiving
         all payments due in the first ten years, any remaining  payments due in
         that  period  will be paid to the  designated  beneficiary  unless  the
         beneficiary  requests  in  writing  that  the  Commuted  Value  of  the
         remaining  payments  be paid in a single  sum.  Payments  to a  married
         Participant  will be made under the annuity option providing a Variable
         Life Annuity  with  One-Half  Survivorship,  i.e.  payments  during the
         Participant's  lifetime  and  providing  further  that  one-half of the
         amount  otherwise  payable to the Participant  will be continued to the
         Participant's  spouse as  contingent  annuitant  so long as the  spouse
         survives the Participant.

     2.  Forms of Variable Annuities

         Because of certain restrictions  contained in the Internal Revenue Code
         and regulations thereunder,  an annuity option is not available under a
         Tax Deferred  Annuity  unless (i) the joint or contingent  annuitant is
         the  Participant's   spouse  or  (ii)  on  the  Participant's   Annuity
         Commencement  Date,  the present  value of the amount to be paid to the
         Participant  while living is greater  than 50% of the present  value of
         the total benefit to the Participant and the Participant's  beneficiary
         (or joint or contingent annuitant, if applicable).

         Similarly,  for Individual Retirement Annuities and Rollover Individual
         Retirement Annuities,  an annuity option is not available unless (i) no
         benefits are provided  which extend beyond the life of the  Participant
         or the lives of the Participant and the Participant's spouse or (ii) no
         benefits are provided  which extend over a period  longer than the life
         expectancy of the Participant or the life expectancy of the Participant
         and spouse.

         A Participant may elect to have Investment Account Values applied under
         one of the following annuity options.  However,  if the monthly Annuity
         Payment  would be less than $20,  the Company  may, at its sole option,
         pay the Investment  Account  Values in full  settlement of all benefits
         otherwise available.

         Variable  Life Annuity with Monthly  Payments  Certain for Zero,  Five,
         Ten, Fifteen or Twenty Years or Installment Refund Period -- a Variable
         Annuity which provides monthly  payments to the Participant  during the
         Participant's  lifetime,  and further provides that if, at the death of
         the  Participant,  monthly  payments  have  been  made for less  than a
         minimum period selected by the Participant,  any remaining payments for
         the balance of such period  shall be paid to a  designated  beneficiary
         unless the  beneficiary  requests in writing that the Commuted Value of
         the   remaining   payments  be  paid  in  a  single  sum.   (Designated
         beneficiaries  entitled to take the remaining  payments or the Commuted
         Value thereof rather than  continuing  monthly  payments should consult
         with  their tax  advisor  to be made  aware of the  differences  in tax
         treatment.)

         The minimum  period may be either zero,  five,  ten,  fifteen or twenty
         years or the period (called  "installment refund period") consisting of
         the number of months  determined  by dividing the amount  applied under
         the option by the initial payment.  If, for example,  a Participant had
         $14,400 to apply under a life option with an installment refund period,
         and if the first monthly payment provided by that amount, as determined
         from the  applicable  annuity  conversion  rates,  would  be $100,  the
         minimum period would be 144 months ($14,400  divided by $100 per month)
         or 12 years. A variable life annuity with an installment  refund period
         guarantees  a minimum  number of  payments,  but not the  amount of any
         monthly payment or the amount of aggregate monthly payments.

         Under the Variable Life Annuity with Zero Years Certain, which provides
         monthly payments to the Participant during the Participant's  lifetime,
         it would be possible  for the  Participant  to receive only one Annuity
         Payment  if the  Participant  died  prior to the due date of the second
         payment  since  payment  is  made  only  during  the  lifetime  of  the
         Participant.

         Joint and Survivor  Variable Life Annuity with Monthly Payments Certain
         for Ten Years -- a Variable Annuity which provides monthly payments for
         a minimum period of ten years and thereafter during the joint lifetimes
         of that  participant  and the  joint  annuitant  named at the time this
         option is elected,  and continuing  after the death of either payee for
         the  amount  that would have been  payable to them  jointly  during the
         remaining  lifetime of the survivor.  In the event the  Participant and
         the joint  annuitant do not survive beyond the minimum ten year period,
         any remaining payments for the balance of such period will be paid to a
         designated  beneficiary unless the beneficiary requests in writing that
         the Commuted  Value of the remaining  payments be paid in a single sum.
         (Designated  beneficiaries  entitled to take the remaining  payments or
         the Commuted  Value thereof  rather than  continuing  monthly  payments
         should  consult  with  their  tax  advisor  to be  made  aware  of  the
         differences in tax treatment.)

         Joint and  Two-Thirds  Survivor  Variable  Life  Annuity  -- a Variable
         Annuity which provides  monthly  payments during the joint lives of the
         Participant  and the  person  designated  by the  Participant  as joint
         annuitant with two-thirds of the amount that would have been payable to
         them jointly continuing to the survivor upon the death of either.

         Variable Life Annuity with One-Half  Survivorship -- a Variable Annuity
         which provides monthly payments during the life of the Participant with
         one-half of the amount otherwise  payable  continuing to the contingent
         annuitant  designated  by the  Participant  so long  as the  contingent
         annuitant lives.

         Under the Joint and Two-thirds Survivor Variable Life Annuity and under
         the  Variable  Life  Annuity with  One-Half  Survivorship,  it would be
         possible for the  Participant  and/or  contingent or joint annuitant to
         receive only one annuity  payment if both died prior to the due date of
         the second payment since payment is made only during their lifetimes.

         Other Options -- Other Variable  Annuity  options  permitted  under the
         applicable  Retirement Plan may be arranged by mutual  agreement of the
         Participant and the Company.

     3.  Basis of Annuity Conversion Rates

         Because  women as a class live longer than men, it has been common that
         retirement  annuities  of equal  cost for women and men of the same age
         will provide  women less  periodic  income at  retirement.  The Supreme
         Court of the United  States ruled in Arizona  Governing  Committee  vs.
         Norris that sex distinct  annuity  tables  under an  employer-sponsored
         benefit plan result in  discrimination  that is prohibited by Title VII
         of the Federal  Civil Rights Act of 1964.  The Court further ruled that
         sex distinct  annuity  tables will be deemed  discriminatory  only when
         used with values  accumulated  from employer  contributions  made after
         August 1, 1983, the date of the ruling.

         Title VII applies only to employers with 15 or more employees. However,
         certain State Fair  Employment Laws and Equal Payment Laws may apply to
         employers with less than 15 employees.

         It is unclear at this time what  degree of  employer  involvement  will
         result in an  Individual  Retirement  Annuity or Tax  Deferred  Annuity
         being  considered a benefit of employment and therefore  subject to the
         Court's ruling.

         The Variable Annuity Contracts  described in this Prospectus offer both
         sex  distinct and sex neutral  annuity  conversion  rates.  The annuity
         rates are used to convert a Participant's  pre-retirement account value
         to a  monthly  lifetime  income  at  retirement.  Usage of  either  sex
         distinct  or sex  neutral  annuity  rates  will  be  determined  by the
         Employer.

         For  each  form of  Variable  Annuity,  the  annuity  conversion  rates
         determine how much the first monthly  Annuity  Payment will be for each
         $1,000 of the Participant's  Investment Account Value applied to effect
         the  Variable  Annuity.  The  conversion  rates  vary  with the form of
         annuity, date of birth, and (unless sex neutral rates are used) the sex
         of the Participant and the joint or contingent  annuitant,  if any. The
         sex distinct  guaranteed annuity conversion rates are based upon (i) an
         interest  rate of 2.5% per annum and (ii)  mortality  according  to the
         "1983 Table a for Individual Annuity Valuation"  projected with Scale G
         to the year 2020,  females  set back six years in age.  The sex neutral
         rates are  determined  for all  Participants  in the same way as female
         rates, as described above. The guaranteed  annuity conversion rates may
         be changed,  but no change which would  provide  less  initial  monthly
         Annuity Payment will take effect for a current Participant.

         The Contract  provides  that an interest rate of not less than 2.5% per
         annum will  represent  the assumed  investment  return.  Currently  the
         assumed  investment  return used in determining the amount of the first
         monthly  payment  is 4%  per  annum.  This  rate  may be  increased  or
         decreased  by the Company in the future but in no event will it be less
         than 2.5% per annum.  If,  under the  Contract,  the actual  investment
         return (as measured by an Annuity Change Factor,  defined below) should
         always equal the assumed investment  return,  Variable Annuity Payments
         would remain  level.  If the actual  investment  return  should  always
         exceed the assumed investment  return,  Variable Annuity Payments would
         increase;  conversely,  if it should  always  be less than the  assumed
         investment return, Variable Annuity Payments would decrease.

         The  current  4%  assumed  investment  return is  higher  than the 2.5%
         interest rate reflected in the annuity  conversion  rates  contained in
         the Contract.  With a 4%  assumption,  Variable  Annuity  Payments will
         commence at a higher  level,  will  increase  less  rapidly when actual
         investment  return  exceeds 4%, and will  decrease  more  rapidly  when
         actual investment return is less than 4%, than would occur with a lower
         assumption.

     4.  Determining the Amount of the First Monthly Annuity Payment

         For each  Investment  Account  the  initial  amount of monthly  annuity
         income  provided  by each $1,000  applied to effect a Variable  Annuity
         shall be based on the option selected and the Investment Account Value,
         after  reduction  for any premium tax,  determined as of the end of the
         Valuation  Period one month before the Annuity  Commencement  Date. The
         initial  monthly  income payment will be determined on the basis of the
         annuity  conversion  rates  applicable on such date to such conversions
         under all contracts of this class issued by the Company.  However,  the
         basis for the annuity  conversion  rates will not produce  less initial
         monthly income than the annuity conversion rate basis described above.

     5.  Determining  the Amount of the Second and  Subsequent  Monthly  Annuity
         Payments

         The second and  subsequent  monthly  Annuity  Payments will be computed
         separately  for each  Division  of  Separate  Account B selected by the
         Participant and will increase or decrease in response to the investment
         experience of the Account  underlying the Division.  The amount of each
         payment will be  determined  by  multiplying  the amount of the monthly
         Annuity Payment due in the immediately  preceding calendar month by the
         Annuity  Change  Factor  for  the  Division  for the  Contract  for the
         calendar month in which the Annuity Payment is due.

         Each Annuity  Change Factor for a Division for a calendar  month is the
         quotient of (a) divided by (b), below:

         (a)  The number which  results from  dividing (i) the  Contract's  Unit
              Value  for  the  Division  for  the  first  Valuation  Date in the
              calendar month beginning one month before the given calendar month
              by (ii) the  Contract's  Unit Value for the Division for the first
              Valuation Date in the calendar  month  beginning two months before
              the given calendar month.

         (b)  An amount equal to one plus the  effective  interest  rate for the
              number  of days  between  the two  Valuation  Dates  specified  in
              subparagraph  (a) above at the interest  rate assumed to determine
              the initial payment of variable benefits to the Participant.

     6.  Hypothetical  Example of  Calculation  of Annuity  Payments  (excluding
         Individual Rollover Retirement Annuity)

         Assume that on the date one month before the Annuity  Commencement Date
         the Participant has an Investment  Account Value of $37,592.  Using the
         appropriate  annuity  conversion  factor  (assuming  $5.88  per  $1,000
         applied) the Investment  Account Value provides a first monthly Annuity
         Payment of $221.04. To determine the amount of the Participant's second
         monthly  payment  assume that the Unit Value as of the first  Valuation
         Date in the preceding  calendar month was $1.3712044 and the Unit Value
         as of the first Valuation Date in the second  preceding  calendar month
         was  $1.3273110.  The Annuity  Change  Factor is determined by dividing
         $1.3712044  by  $1.3273110,  which equals  1.0330694,  and dividing the
         result by an amount  corresponding to the amount of one increased by an
         assumed  investment  return of 4%  (which  for a thirty  day  period is
         1.0032288). 1.0330694 divided by 1.0032288 results in an Annuity Change
         Factor for the month of  1.0297446.  Applying this factor to the amount
         of Annuity  Payment for the previous month results in a current monthly
         payment of $227.61 ($221.04 multiplied by 1.0297446 equals $227.61).

C.   Payment on Death of Participant

     1.  Prior to Annuity Commencement Date

         If a  Participant  dies prior to the  Annuity  Commencement  Date,  the
         Company,  upon receipt of due proof of death,  will, in accordance with
         prior   instructions   from  the  Participant,   either  (i)  establish
         Investment  Accounts for the beneficiary to hold the Investment Account
         Values of the  Participant or (ii) if an Associated  Fixed Contract has
         been  issued,  cancel all  Investment  Account  units as of the date of
         receipt of proof of death and transfer the  Investment  Account  Values
         (determined  as of the end of the  Valuation  Period in which  proof of
         death was received) to the Associated  Fixed  Contract.  In lieu of the
         foregoing,  the Company may pay all or part of the  Investment  Account
         values  to the  beneficiary  in a  single  sum,  provided  that  if the
         Participant   had  elected  that  the  Investment   Account  Values  be
         transferred to an Associated Fixed Contract,  the beneficiary's written
         request for the payment  must be given  before the date the transfer is
         to be effective.

         A beneficiary  of a Participant  may elect to have all or a part of the
         amount  available  under any Associated  Fixed Contract  transferred to
         this Contract to establish  Investment  Accounts for the beneficiary or
         to have  all or a part of the  amount  available  under  this  Contract
         transferred  to any  Associated  Fixed  Contract.  If the  value of the
         Investment  Accounts is less than $1,750, the Company may at its option
         pay the  beneficiary  the value of such  accounts  in lieu of all other
         benefits. A spouse beneficiary may elect to have the Investment Account
         Values applied to provide  Annuity  Payments or paid in a single sum. A
         beneficiary  other  than  the  Participant's   spouse  must  receive  a
         distribution  of all  values  within  five  years of the  Participant's
         death.

         If a Participant  under a Contract  funding a Tax Deferred Annuity dies
         prior to Annuity  Commencement  Date, the Company,  upon receipt of due
         proof of death,  will, in accordance with prior  instructions  from the
         Participant,  either (i) pay the value of the Participant's  Investment
         Accounts to the  beneficiary  in a single sum or (ii) if an  Associated
         Fixed Contract has been issued,  cancel all Investment Account units as
         of the  date  of  receipt  of the  proof  of  death  and  transfer  the
         Investment  Account  Values  (determined as of the end of the Valuation
         Period in which proof of death was  received) to the  Associated  Fixed
         Contract.  Prior  to  any  payment  or  transfer  by the  Company,  the
         beneficiary  may  change  the  election  made  by the  Participant  or,
         alternatively,  elect  to have  the  Participant's  Investment  Account
         Values  applied to purchase a  supplementary  contract from the Company
         for annuity benefits.  Such a purchase must conform to the requirements
         of the supplementary contract.

         Under all  Contracts,  a  beneficiary  must  begin to  receive  Annuity
         Payments  or  receive a single  sum  payment  not later than five years
         after the Participant's  death. An election to receive Annuity Payments
         must be made  prior  to the  single  sum  payment  to the  beneficiary.
         Annuity  income  must be payable as  lifetime  annuity  income  with no
         benefits beyond the beneficiary's life or life expectancy. In addition,
         the amount of the monthly Annuity Payments must be at least $20, or the
         Company  may at  its  option  pay  the  beneficiary  the  value  of the
         Investment  Accounts in lieu of all other  benefits.  The first Annuity
         Payment will be made on the first day of the calendar  month  specified
         in the election,  but in no event prior to the date one month after any
         transfer from any Associated Fixed Contract is effective. The amount to
         be applied  will be  determined  as of one month  prior to the date the
         first monthly payment is due. The beneficiary  must be a natural person
         in order to elect  Annuity  Payments.  The election  must be by Written
         Notification.  The annuity conversion rates applicable to a beneficiary
         shall be the annuity  conversion  rates the Company makes  available to
         all  beneficiaries  under contracts of this class. The beneficiary will
         receive a written description of the options available.

     2.  Subsequent to Annuity Commencement Date

         Upon the death of a Participant  receiving monthly Annuity Payments, no
         benefits will be available  except as may be provided under the form of
         annuity  selected.  If  provided  for  under the form of  annuity,  the
         beneficiary will continue  receiving any remaining  payments unless the
         beneficiary  requests  in  writing  that  the  Commuted  Value  of  the
         remaining payments be paid in a single sum.

D.   Withdrawals and Transfers

     1.  Cash Withdrawals

         The  Contracts  are  designed  for  and  intended  to be  used  to fund
         Retirement Plans. However,  subject to any Retirement Plan limitations,
         any restrictions  imposed by provisions of the Internal Revenue Code or
         any reduction  for vesting  provided for in the  Retirement  Plan as to
         amounts   available,   the  Participant  may  withdraw  cash  from  the
         Investment Accounts at any time prior to the Annuity  Commencement Date
         subject to any  charges  that may be  applied.  Distributions  from Tax
         Deferred Annuities may begin only after the Participant  attains age 59
         1/2, separates from service,  dies or becomes disabled,  or in the case
         of hardship.

         The procedure with respect to cash withdrawals is as follows:

         (a)  The Participant's  Investment Account Values will be determined at
              the end of the Valuation Period in which the withdrawal request is
              received  and will be paid to the  Participant  within  seven days
              thereafter.   The  Company   may  require   that  any  request  be
              accompanied by the certificate issued to the Participant.

         (b)  No  more  than  two  partial  cash  withdrawals  can be  made in a
              twelve-month period without the Company's express consent.

         (c)  The amount  available  may be subject to the  Contingent  Deferred
              Sales  Charge  and,  in the  case of a total  withdrawal,  will be
              subject to the Administration Charge.

         (d)  The amount  available  is also subject to any  restriction  in the
              Participant's Retirement Plan.

         Any cash withdrawal made will result in the cancellation of a number of
         units in each Investment  Account of the Participant  from which values
         have been withdrawn.  The number of units cancelled from the Investment
         Account will be equal to the amount withdrawn divided by the Unit Value
         for its  Division of  Separate  Account B for the  Valuation  Period in
         which the  cancellation  is effective.  Units will also be cancelled to
         cover any charges assessed under (c) above.

         (Special  Note:  Under the Texas  Education  Code,  Participants  under
         contracts  issued in connection with Optional  Retirement  Programs for
         certain  employees  of  Texas  institutions  of  higher  education  are
         prohibited from making  withdrawals  except in the event of termination
         of employment, retirement or death of the Participant.)

     2.  Transfers to the Contract

         If an  Associated  Fixed  Contract has been issued by the Company,  and
         except as  otherwise  provided by the  applicable  Retirement  Plan,  a
         Participant may, by Written Notification,  transfer all or a portion of
         the  proceeds  available  under the  Associated  Fixed  Contract to the
         Investment Account(s) under the Contract at any time at least one month
         before  Annuity   Commencement  Date,  subject  to  the  terms  of  the
         Associated Fixed Contract.

     3.  Transfers Between Divisions

         Upon  Written  Notification,  all  or a  portion  of  the  value  of an
         Investment  Account in one Division may be transferred to an Investment
         Account in another Division available under the Contract. Transfers may
         be made at any time at least one month before the Annuity  Commencement
         Date.  However,  only two transfers from any Investment  Account may be
         made in a  twelve-month  period  without  the  express  consent  of the
         Company.

         A transfer will be effective as of the end of the  Valuation  Period in
         which the request is received.  Any amount  transferred  will result in
         the  cancellation  of units in the  Investment  Account  from which the
         transfer is made.  The number of units  cancelled  will be equal to the
         amount  transferred  from that account divided by the Unit Value of the
         Division for the  Valuation  Period in which the transfer is effective.
         The  transferred  amount will result in the  crediting  of units in the
         Investment  Account to which the transfer is made.  The number of units
         credited  will be  equal  to the  amount  transferred  to that  account
         divided by the Unit Value of the Division for the  Valuation  Period in
         which the transfer is effective.

      4. Transfers to the Associated Fixed Contract

         Except as  otherwise  provided by the  applicable  Retirement  Plan,  a
         Participant  may by Written  Notification  transfer all or a portion of
         available Investment Account Values to the Associated Fixed Contract at
         any time at least one month  before  Annuity  Commencement  Date.  Such
         transfers  are subject to the same  provisions  regarding  frequency of
         transfer,  effective  date of  transfer  and  cancellation  of units as
         described above in "Transfers Between Divisions".

     5.  Special Situation Involving Alternate Funding Agents

         The Contracts  may be subject to  provisions  of an Employer  sponsored
         Retirement  Plan which  allows  the  Investment  Account  Values of all
         Participants  of the Retirement  Plan to be transferred to an Alternate
         Funding  Agent  with  or  without  the  consent  of  the  Participants.
         Transfers to an Alternate  Funding Agent require  Written  Notification
         from the person or persons specified by the Retirement Plan.

         The amount to be transferred  will be equal to the  Investment  Account
         Values  determined as of the end of the  Valuation  Period in which the
         Written Notification is received.  Such transfers may be subject to the
         Contingent Deferred Sales Charge.

         Alternate  Funding  Agent  means  an  insurance  company  or  custodian
         designated by Written Notification and authorized to receive any amount
         or  amounts  transferred  from  the  Contract  as to a  Participant  or
         Participants  and to apply  such  amount or amounts  for the  exclusive
         benefit of the  Participant  or  Participants  under a retirement  plan
         which continues to meet the  requirements of the Internal Revenue Code,
         without  any  obligation  on the part of the  Company  in regard to the
         application.

     6.  Postponement of Cash Withdrawal or Transfer

         Any cash withdrawal or transfer to be made from the Contract or between
         Divisions in  accordance  with the  preceding  paragraphs  will be made
         within  seven  days  after  Written  Notification  for such  payment or
         transfer  is received  by the  Company.  However,  such  withdrawal  or
         transfer  may be  deferred  during any period  when the right to redeem
         Account  shares is  suspended  as  permitted  under  provisions  of the
         Investment Company Act of 1940, as amended.  The right to redeem shares
         may be  suspended  during any period  when (a)  trading on the New York
         Stock  Exchange is  restricted  as  determined  by the  Securities  and
         Exchange  Commission or such Exchange is closed for other than weekends
         and holidays;  (b) an emergency exists, as determined by the Securities
         and  Exchange  Commission,  as a result  of which (i)  disposal  by the
         Account of securities owned by it is not reasonably practicable or (ii)
         it is not  reasonably  practicable  for the Account fairly to determine
         the value of its net assets;  or (c) the Commission by order so permits
         for the protection of security holders. If any deferment of transfer or
         withdrawal  is  in  effect  and  has  not  been  cancelled  by  Written
         Notification to the Company within the period of deferment,  the amount
         to be  transferred  or withdrawn  shall be  determined  as of the first
         Valuation Date  following  expiration of the permitted  deferment,  and
         transfer or withdrawal will be made within seven days thereafter.

E.   Other Contractual Provisions

     1.  Contribution Limits

         The Contract  prescribes no limits on the minimum  Contributions  which
         may be made on behalf of a Participant.  Maximum  Contributions for Tax
         Deferred  Annuities  are limited to (a) amounts  excludable  from gross
         income of Participants pursuant to the exclusion allowance provision of
         Section 403(b) of the Internal  Revenue Code, and (b) the  contribution
         limitation as specified in Section 415(c) of the Internal  Revenue Code
         unless  otherwise  allowed by the Company.  Maximum  Contributions  for
         Individual  Retirement  Annuities are limited to (a) amounts deductible
         by a Participant under Internal Revenue Code Section 219 or (b) amounts
         previously  deducted by the  Participant  under  Internal  Revenue Code
         Section  219  and  accumulated  in  another  funding  vehicle,   unless
         otherwise  allowed by the Company.  Maximum  Contributions for Rollover
         Individual  Retirement Annuities are limited to amounts the Participant
         is  entitled  to  roll  over  under  Internal   Revenue  Code  Sections
         402(a)(5), 402(a)(7), 403(a)(4), 403(b)(8), 408(d)(3), or 409(b)(3)(C).

     2.  Assignment

         No rights  available  or  benefits  payable  under the  Contract to any
         Participant,   beneficiary   or  contingent  or  joint   annuitant  are
         assignable,  transferable or subject to pledge, and all such rights and
         benefits  shall be exempt from the claims of  creditors  to the maximum
         extent permitted by law.

         A  Participant's   Investment   Account  Values  are   non-forfeitable;
         provided,  however, if the Retirement Plan specifically so provides,  a
         Participant's  Investment Account Values shall be reduced to the extent
         required by the vesting  provisions  of the  Retirement  Plan as of the
         date the Company receives  Written  Notification of the event requiring
         the reduction.

     3.  Cessation of Contributions

         A cessation of Contributions  with respect to all Participants  under a
         Retirement  Plan  shall  occur at the  election  of the  Employer  upon
         Written  Notification  to the  Company  or as of the  date on  which no
         Investment  Accounts  subject to the  Retirement  Plan remain under the
         Contract.  Following  a  cessation  of  Contributions  all terms of the
         Contract  will  continue to apply except that no further  Contributions
         may be made.

     4.  Limitation as to Participants

   
         If at any time Principal  Management  Corporation is not the investment
         manager of the Mutual Fund,  the Company may give written notice to the
         Contractholder  that no  additional  persons  may be covered  under the
         Contract as Participants.
    

      5. Substitution of Securities

         If shares of an Account are not  available  at some time in the future,
         or if in the judgment of the Company further  investment in such shares
         would be no longer appropriate,  there may be substituted  therefor, or
         Contributions  received  after a date  specified  by the Company may be
         applied to purchase (i) shares of another Account of Principal Variable
         Contracts  Fund,  Inc.  (ii)  shares  of  another  registered  open-end
         investment  company,  or  (iii)  securities  or other  property  as the
         Company should in its discretion  select. Any necessary approval of the
         Securities  and  Exchange  Commission  or of owners of or  participants
         under contracts  participating  in Separate Account B shall be obtained
         before any substitution is made.

      6. Changes in a Contract

         The terms of a Contract may be changed at any time by written agreement
         between the Company and the  Contractholder  without the consent of any
         Participant,  beneficiary,  or joint or contingent annuitant.  However,
         except as required by law or regulation,  no such change shall apply to
         Variable  Annuities  which were in the  course of payment  prior to the
         effective date of the change.  If the  Contractholder is the trustee of
         the  trust   established   to  hold  a  Contract  for  the  benefit  of
         participating  units, the Contractholder may be limited in its exercise
         of this amendment  right. A majority of the  participating  units which
         are  Employers  under the  Contract  may have to agree to the  proposed
         change in the Contract  before the change can be made. The Company will
         notify any Participant affected by any change under this paragraph.

         The Company may  unilaterally  change the Contract at any time in order
         to  meet  the  requirements  of any  law or  regulation  issued  by any
         governmental agency to which the Company is subject.  In addition,  the
         Company  may,  on 60  days  prior  notice  to the  Contractholder,  the
         Employer,  and each  Participant,  unilaterally  change  the  basis for
         determining  Investment  Account Values,  the Net Investment Factor and
         the Annuity Change Factor; the guaranteed annuity conversion rates; and
         the provisions with respect to transfers to or from an Associated Fixed
         Contract or between  Divisions.  However,  no change in the  guaranteed
         annuity  conversion  rates will take  effect for a current  Participant
         which  would  reduce the amount of the  Participant's  minimum  initial
         monthly payment.

         Furthermore,  the Company may, on 60 days notice to the Contractholder,
         the Employer, and each Participant affected by the change, unilaterally
         change the mortality and expense risks charge.  However,  such a change
         can only be made after the Contract has been in effect for at least one
         year and  provided  that (a) the charge  shall in no event exceed 2.00%
         within the period of five years from the issuance of the Contract,  (b)
         the charge  shall not be changed more  frequently  than once in any one
         year period and (c) no change  shall apply to  annuities  which were in
         the  course  of  payment  prior to the  effective  date of the  change.
         Finally,  the  Company  reserves  the right to limit or refuse  further
         Contributions   under  the   Contract   upon  60  days  notice  to  the
         Contractholder, the Employer, and each Participant.

     7.  Statement of Values

         The Company  will furnish  each  Participant  at least once during each
         year  a  statement   showing  the  number  of  units  credited  to  the
         Participant's Investment Accounts, Unit Values for the accounts and the
         resulting Investment Account Values.

DISTRIBUTION OF THESE CONTRACTS

     These Contracts are no longer being offered for sale.

VOTING RIGHTS

     The Company shall vote Account shares held in Separate Account B at regular
and special  meetings of  shareholders  of each Account,  but will follow voting
instructions  received  from persons  having the voting  interest in the Account
shares.

     The number of Account  shares as to which a person has the voting  interest
will be  determined  by the  Company  as of a date  which  will not be more than
ninety days prior to the meeting of the Account, and voting instructions will be
solicited by written communication at least ten days prior to the meeting.

     During the  accumulation  period,  the Participant is the person having the
voting interest in the Account shares  attributable to each Investment  Account.
The number of Account shares held in Separate  Account B which are  attributable
to each  Investment  Account is  determined by dividing the  Investment  Account
Value by the net asset value of one Account share.

     During the annuity period, the person then entitled to Annuity Payments has
the voting interest in the Account shares  attributable to the Variable Annuity.
The number of Account shares held in Separate  Account B which are  attributable
to each Variable  Annuity is determined by dividing the reserve for the Variable
Annuity by the net asset value of one Account share.  The  Participant's  voting
interest  in the  Account  shares  attributable  to the  Variable  Annuity  will
ordinarily decrease during the annuity period since the reserve for the Variable
Annuity decreases due to the reduction in the expected payment period.

     Account shares for which  participants or payees of variable  annuities are
entitled  to give  voting  instructions,  but for which none are  received,  and
shares of the Fund owned by the Company will be voted in the same  proportion as
the aggregate shares for which voting instructions have been received.

     Proxy  material  will be provided to each person  having a voting  interest
together with an appropriate form which may used to give voting  instructions to
the Company.

     If the Company  determines  pursuant to applicable  law that Account shares
held in Separate  Account B need not be voted pursuant to instructions  received
from persons  otherwise  having the voting interest as provided above,  then the
Company may vote Account shares held in Separate Account B in its own right.

FEDERAL TAX STATUS

     Investment  gains of the  Accounts  credited to Separate  Account B are not
taxable to a Participant until received in the form of a cash withdrawal from an
Investment Account or in the form of Variable Annuity Payments. Cash withdrawals
will  generally  be taxed as ordinary  income in the year  received,  but may be
eligible for the income averaging  provisions of the Internal Revenue Code. Each
Variable  Annuity  Payment will be taxed as ordinary  income in accordance  with
Section 72 of the Internal Revenue Code.

     As a general rule, however, a Participant receiving Annuity Payments at the
time of retirement  will be in a lower income tax bracket due to reduced  income
and larger exemptions.

     Under  Section  403(b) of the  Internal  Revenue  Code,  contributions  for
employees made under a Tax Deferred Annuity by a public school or other Employer
are  excludable  from the gross income of the  employees in the year made to the
extent  that the  aggregate  contributions  per year for such  employees  do not
exceed the exclusion  allowance  set forth in Section  403(b)(2) of the Internal
Revenue Code. (In addition,  contributions  are limited by the  restrictions  of
Section 415(c) of the Internal  Revenue  Code.)  Adjustments in the tax base are
allowed  where a portion of the cost of the benefit being  distributed  has been
paid by the Participant out of funds not excludable from the Participant's gross
income tax in the year made,  rather than having been paid by the  Participant's
Employer out of funds that were excludable from the  Participant's  gross income
tax in the year made.

     Distributions  from  a Tax  Deferred  Annuity  may  begin  only  after  the
participant  attains  age 59  1/2,  separates  from  service,  dies  or  becomes
disabled, or in the case of hardship.

     Under Sections 219 and 408 of the Internal  Revenue Code, an individual who
has earned income may establish an Individual Retirement Annuity plan or program
for the  accumulation  of retirement  savings on a  tax-deferred  basis for such
individual  and  such  individual's   nonemployed  spouse.  The  individual  may
establish  and make  contributions  into  such a plan or this may be done by the
individual's  employer or union.  These  contributions may be invested in, among
other things,  annuity contracts including the variable annuity contract offered
by this Prospectus. The law provides that such contributions will be deductible,
though only to the extent allowed by the Internal  Revenue Code. No deduction is
allowed for contributions  made during or after the year in which the individual
attains  age 70 1/2,  and  contributions  during or after that year,  as well as
contributions in excess of the limits,  are excess  contributions and may result
in certain adverse tax consequences.

     All distributions  under Individual  Retirement  Annuities and Tax Deferred
Annuities will be taxed as ordinary income.  Thus, these  distributions will not
be  eligible  for  capital  gains  treatment  or  the  special  averaging  rules
applicable to lump sum  distributions  from some types of qualifying plans. As a
general rule, any distribution  that is not in the form of a life annuity,  made
before  the  participant  attains  age 59 1/2  (except  in the event of death or
disability)  will be a premature  distribution  and be subject to a 10% penalty.
There is an  exception to this rule for Tax  Deferred  Annuities.  Distributions
from Tax Deferred  Annuities  which are due to separation from service after age
55 or  which  are used for  certain  medical  expenses  are not  subject  to the
penalty.

     Distributions  from  Individual   Retirement  Annuities  and  Tax  Deferred
Annuities  must begin before April 1 of the calendar year following the calendar
year in which the participant  attains age 70 1/2. There is an exception to this
rule for Tax Deferred  Annuities.  Tax Deferred  Annuity  benefits which accrued
prior  to  January  1,  1987  do not  have  to be  distributed  until  age 75 or
termination of employment.

     If a participant fails to make a required distribution a 50% excise tax may
be assessed on the amount required to be distributed.  In addition, as a general
rule,  distributions  over $150,000 a year, and lump sum  distributions  greater
than $750,000 are subject to a 15% excise tax.

     When a Participant under an Individual  Retirement  Annuity or Tax Deferred
Annuity  dies  before  the  Annuity   Commencement  Date,  all  values  must  be
distributed  to the  Participant's  beneficiary  within five  years.  The 5-year
payout rule does not apply to benefits paid to a surviving  spouse under a joint
and survivor  annuity  option,  nor to benefits paid to a surviving  beneficiary
under a permitted term certain period. If the surviving spouse is the designated
beneficiary, distribution of benefits need not begin until the date on which the
Participant  would have  attained  age 70 1/2 years,  and the  benefits  must be
distributed over the life of the surviving spouse or over a period not exceeding
the life  expectancy of the spouse.  A similar rule applies to other  designated
beneficiaries,  except that the distribution of benefits must commence not later
than one year after the date of death of the participant.

     It should be  recognized  that the  description  of the federal  income tax
status of amounts  received  under the Contracts are not  exhaustive  and do not
purport to cover all situations.

     A qualified tax advisor should be consulted for complete information.  (For
the federal tax status of the Company  and  Separate  Account B, see  "Principal
Mutual Life Insurance Company Separate Account B".)

STATE REGULATION

     The Company is subject to the laws of the State of Iowa governing insurance
companies and to regulation by the Insurance Department of the State of Iowa. An
annual  statement  in a  prescribed  form  must be filed by March 1 in each year
covering the  operations of the Company for the preceding year and its financial
condition  on  December  31st of such year.  Its books and assets are subject to
review or examination by the  Commissioner  of Insurance of the State of Iowa or
his  representatives  at all times,  and a full examination of its operations is
conducted  periodically by the National Association of Insurance  Commissioners.
Iowa law and regulations also prescribe permissible  investments,  but this does
not involve supervision of the investment management or policy of the Company.

     In addition,  the Company is subject to the insurance laws and  regulations
of other states and jurisdictions in which it is licensed to operate. Generally,
the insurance  departments of these states and  jurisdictions  apply the laws of
the state of domicile in determining the field of permissible investments.

LEGAL OPINIONS

     Legal matters applicable to the issue and sale of the Contracts,  including
the right of the Company to issue  Contracts under Iowa Insurance Law, have been
passed upon by Gregg R. Narber, Senior Vice President and General Counsel.

LEGAL PROCEEDINGS

     There are no legal  proceedings  pending to which  Separate  Account B is a
party or which would materially affect Separate Account B.

REGISTRATION STATEMENT

     This  Prospectus  omits some  information  contained  in the  Statement  of
Additional  Information (or Part B of the Registration  Statement) and Part C of
the  Registration  Statement which the Company has filed with the Securities and
Exchange  Commission.   The  Statement  of  Additional   Information  is  hereby
incorporated  by  reference  into this  Prospectus.  A copy of the  Statement of
Additional  Information can be obtained upon request, free of charge, by writing
or telephoning Princor Financial Services Corporation.  You may obtain a copy of
Part C of the  Registration  Statement  filed with the  Securities  and Exchange
Commission,  Washington, D.C. from the Commission upon payment of the prescribed
fees.

OTHER VARIABLE ANNUITY CONTRACTS

     The  Company   currently  offers  other  variable  annuity  contracts  that
participate in Separate Account B. In the future, additional group or individual
variable annuity  contracts may be designated by the Company as participating in
Separate Account B.

INDEPENDENT AUDITORS

     The  financial  statements  of  Principal  Mutual  Life  Insurance  Company
Separate  Account B and the consolidated  financial  statements of The Principal
Financial Group(R) (comprised of Principal Mutual Life Insurance Company and its
subsidiaries) which are included in the Statement of Additional Information have
been  audited  by  Ernst & Young  LLP,  independent  auditors,  for the  periods
indicated in their  reports  thereon which appear in the Statement of Additional
Information.

FINANCIAL STATEMENTS

     The consolidated  financial  statements of The Principal Financial Group(R)
(comprised  of the  Company  and its  subsidiaries)  which are  included in this
Prospectus should be considered only as bearing on the ability of the Company to
meet its obligations under the Policy.  They should not be considered as bearing
on the investment performance of the assets held in the Separate Account.

APPENDIX 1

     Premium taxes applicable to Contracts described in this Prospectus:

                                         403(b)         408 Individual
                                      Tax Deferred        Retirement
                                        Annuities          Accounts
                                      ------------      --------------

     California                            0.50%             0.50%
     District of Columbia                  2.25              2.25
     Kentucky                              2.00              2.00
     West Virginia                         1.00              1.00
     All other states                      --                 --

APPENDIX 2

     Set forth  below is an example  of the  manner in which the  Administration
Charge is computed.

     The Administration Charge has two components -- a fixed charge of $25 and a
charge equal to 0.5% of the first $50,000 of a Participant's  Investment Account
Values.  The amount of the percentage  charge is determined by  multiplying  the
total  value  of the  Participant's  Investment  Accounts  by a  percentage  the
numerator of which is 0.5% of the first $50,000 and the  denominator of which is
the  total  value  of the  Investment  Accounts.  Assume  that  a  Participant's
Investment  Account Value based on the Capital Value Division is $40,000 and the
Investment Account Value based on the Money Market Division is $60,000.  In this
case,  the total  Investment  Account  Value of $100,000 is  multiplied by 0.25%
($250/$100,000)  resulting in a charge of $250. The combined charge of $275 ($25
plus $250) is  deducted  proportionately  from the  Investment  Accounts  of the
Participant,  $110 (40% of $275) from the Investment  Account Value based on the
Capital Value Division and $165 (60% of $275) from the Investment  Account Value
based on the Money Market Division.

     Assume that in the example above all of the annuity contributions under the
Retirement  Plan of the Employer are payable to the  Company.  As a result,  the
percentage used to determine the second  component of the charge is based on the
aggregate  Investment  Account Values of all  Participants of the Employer.  For
example,  assume  that there is one other  Participant  with a total  Investment
Account  Value  of  $200,000.   The  total  Investment  Account  Value  of  each
Participant is multiplied by a percentage the numerator of which is $250 (0.5% x
$50,000) and the denominator of which is $300,000, or 0.08333%.  The Participant
with  a  total   Investment   Account   Value  of  $100,000  is  subject  to  an
Administration  Charge of $108.33,  $25 plus $83.33 (0.0008333 x $100,000),  and
the Participant with a total Investment  Account Value of $200,000 is subject to
an Administration Charge of $191.67, $25 plus $166.67 (0.0008333 x $200,000). In
effect, the $250 charge based on the Participants'  aggregate Investment Account
Values has been allocated proportionately between them.

CONTRACTHOLDERS' INQUIRIES

     Contractholders' inquiries should be directed to Princor Financial Services
Corporation,  a Member  of The  Principal  Financial  Group,  Des  Moines,  Iowa
50392-0200, (515) 247-5711.

TABLE OF CONTENTS OF THE STATEMENT OF ADDITIONAL INFORMATION

     The table of  contents  for the  Statement  of  Additional  Information  is
provided below.

                                TABLE OF CONTENTS

                                                                            Page

              General Information and History  .............................. 3

              Independent Auditors........................................... 3

              Underwriting Commissions....................................... 3

              Calculation of Yield and Total Return.......................... 3

              Principal Mutual Life Insurance Company Separate Account B:

                  Report of Independent Auditors............................. 5

                  Financial Statements....................................... 6

              The Principal Financial Group(R) :

                  Report of Independent Auditors.............................23

                  Financial Statements.......................................24



          To obtain a copy of the Statement of Additional Information,
                      free of charge, write or telephone:


                     Princor Financial Services Corporation
                                   a Member of
                          The Principal Financial Group
                           Des Moines, Iowa 50392-0200
                            Telephone: 1-800-247-9988

                                     PART B

           PRINCIPAL MUTUAL LIFE INSURANCE COMPANY SEPARATE ACCOUNT B

               PENSION BUILDER - GROUP VARIABLE ANNUITY CONTRACTS

   
                        FOR TAX-DEFERRED RETIREMENT PLANS
    

                       Statement of Additional Information

   
                        dated __________________________

     This  Statement  of  Additional   Information  provides  information  about
Principal  Mutual Life Insurance  Company  Separate  Account B Pension Builder -
Group Variable Annuity Contracts (the "Contract" or the "Contracts") in addition
to the  information  that  is  contained  in the  Contract's  Prospectus,  dated
_________________.
    

     This Statement of Additional Information is not a prospectus.  It should be
read in conjunction with the Prospectus, a copy of which can be obtained free of
charge by writing or telephoning:

                     Princor Financial Services Corporation
                                   a Member of
                          The Principal Financial Group
                           Des Moines Iowa 50392-0200
                            Telephone: 1-800-247-9988


                                TABLE OF CONTENTS

                                                                            Page

General Information and History  ............................................  3

Independent Auditors.........................................................  3

Underwriting Commissions ....................................................  3

Calculation of Yield and Total Return........................................  3

Principal Mutual Life Insurance Company Separate Account B:

     Report of Independent Auditors..........................................  5

     Financial Statements....................................................  6

The Principal Financial Group(R):

     Report of Independent Auditors.......................................... 23

     Financial Statements.................................................... 24


GENERAL INFORMATION AND HISTORY

Principal  Mutual Life  Insurance  Company was  formerly  known as Bankers  Life
Company.  The  Company's  name was changed to  Principal  Mutual Life  Insurance
Company effective July 1, 1986.

INDEPENDENT AUDITORS

Ernst & Young LLP, Des Moines, Iowa, serve as independent auditors for Principal
Mutual Life Insurance  Company  Separate  Account B and The Principal  Financial
Group  perform  audit and  accounting  services for  Separate  Account B and The
Principal Financial Group.

UNDERWRITING COMMISSIONS

Aggregate  dollar  amount of  underwriting  commissions  paid to and retained by
Princor Financial Services Corporation:

   
                Year                  Paid To                Retained by
                ----                  -------                -----------
                1997               $                          $
                1996               $11,090,837.12             $14,528.47
                1995                $5,326,848.77             $26,014.78
    

CALCULATION OF YIELD AND TOTAL RETURN

From time to time the Account advertises its Money Market Division's "yield" and
"effective  yield." Both yield figures are based on historical  earnings and are
not intended to indicate future performance.  The "yield" of the division refers
to the income generated by an investment in the division over a seven-day period
(which  period  will  be  stated  in the  advertisement).  This  income  is then
"annualized."  That is, the amount of income generated by the investment  during
that week is  assumed  to be  generated  each week over a 52-week  period and is
shown as a percentage of the  investment.  The  "effective  yield" is calculated
similarly  but,  when  annualized,  the income  earned by an  investment  in the
division is assumed to be  reinvested.  The  "effective  yield" will be slightly
higher  than the  "yield"  because  of the  compounding  effect of this  assumed
reinvestment. Neither yield quotation reflects sales load deducted from purchase
payments which, if included, would reduce the "yield" and "effective yield." The
7-day yields of the Money Market  Division  for the period  ending  December 31,
1997 are:

   
                                Annualized Yield         Effective Yield
                                ----------------         ---------------
         TSA/IRA                     3.59%                    3.65%
         Rollover IRA                4.09%                    4.18%
    

From time to time, the Separate  Account will advertise the average annual total
return of its various divisions.  The average annual total return for any of the
divisions  is computed by  calculating  the average  annual  compounded  rate of
return over the stated period that would equate an initial $1,000  investment to
the ending  redeemable  contract value. In this  calculation the ending value is
reduced by a contingent  deferred sales charge that decreases from 7% to 0% over
a period of 10 years.  The  Separate  Account may also  advertise  total  return
figures of its Divisions for a specified  period that does not take into account
the sales charge in order to illustrate the change in the Division's  unit value
over time. See  "Deductions  Under the Contracts" for a discussion of contingent
deferred sales charges.

The average annual total returns for the period ending December 31, 1997 are:

<TABLE>
<CAPTION>
                                                With Contingent                   Without Contingent
                                             Deferred Sales Charge               Deferred Sales Charge
                                      ---------------------------------   ---------------------------------
                                      One Year     Five Year   Ten Year   One Year     Five Year   Ten Year
                                      --------     ---------   --------   --------     ---------   --------
<S>                                      <C>         <C>         <C>          <C>        <C>         <C>
   
   Capital Value Division
     TSA/IRA                             16.81       14.45       12.91        25.60      15.44       12.99
     Rollover IRA                        17.48       15.04       13.48        26.33      16.03       13.56
   Government Securities Division
     TSA/IRA                              0.26        4.30        7.14         7.81       5.20        7.22
     Rollover IRA                         0.76        4.82        7.67         8.35       5.73        7.75
</TABLE>

<PAGE>
                                     PART C
                        PENSION BUILDER VARIABLE CONTRACT
                                OTHER INFORMATION

Item 24.  Financial Statements and Exhibits

          (a)    Financial Statements included in the Registration Statement
                 (1)   Part A:
                       Condensed Financial Information for each of the 10 years
                       ended December 31, 1997.*

                 (2)   Part B:
                               
                       Principal Mutual Life Insurance Company Separate
                        Account B:
                          Report of Independent Auditors.*
                          Statement of Net Assets, December 31, 1997.*
                          Statement of Operations for the year ended 
                             December 31, 1997.*
                          Statements of Changes in Net Assets for the years
                             ended December 31, 1997 and 1996.*
                          Notes to  Financial Statements.*
                       The Principal Financial Group(R):
                          Report of Independent Auditors.*
                          Consolidated Statements of Operations for the years
                             ended December 31, 1997 and 1996.*
                          Consolidated Statements of Financial Position,
                              December 31, 1997 and 1996.*
                          Consolidated Statements of Equity for the years
                             ended  December 31, 1997 and 1996.*
                          Consolidated Statements of Cash Flows for the
                             years ended December 31, 1997 and 1996.*
                          Notes to Consolidated Financial Statements.*

          (b)    Exhibits
                 (1)   Board resolution of Registrant. (Filed 4/12/96)
                 (3a)  Distribution Agreement (Filed 4/12/96)
                 (3b)  Selling Agreement (Filed 4/12/96)
                 (4a)  Form of Variable Annuity Contract (Filed 4/12/96)
                 (4b)  Form of Variable Annuity Contract (Filed 4/12/96)
                 (4c)  Form of Variable Annuity Contract (Filed 4/12/96)
                 (5)   Form of Variable Annuity Application (Filed 4/12/96)
                 (6a)  Articles of Incorporation of Depositor (Filed 4/12/96)
                 (6b)  Bylaws of Depositor (Filed 4/12/96)
                 (9)   Opinion of Counsel (Filed 4/12/96)
                 (10a) Consent of Independent Auditors (Filed 12/16/97)
                 (10b) Powers of Attorney (Filed 4/15/97)
                 (13a) Total Return Calculation (Filed 4/12/96)
                 (13b) Annualized Yield for Separate Account B (Filed 4/12/96)
<PAGE>
Item 25.  Officers and Directors of the Depositor

          Principal  Mutual  Life  Insurance  Company  is  managed by a Board of
          Directors  which is elected by its  policyowners.  The  directors  and
          executive  officers of the Company,  their positions with the Company,
          including Board Committee  memberships,  and their principal  business
          address, are as follows:

            DIRECTORS:                       Principal
            Name, Positions and Offices      Business Address

            MARY VERMEER ANDRINGA            Vermeer Manufacturing Company
            Director                         Box 200
            Member, Nominating Committee     Pella, IA  50219-0200

            RUTH M. DAVIS                    The Pymatuning Group, Inc.
            Director                         Suite 570, 4900 Seminary Road
            Member, Nominating Committee     Alexandria, VA  22311

            DAVID J. DRURY                   The Principal Financial Group
            Director                         Des Moines, IA  50392
            Chairman of the Board
            Chief Executive Officer
            Chair, Executive Committee

            C. DANIEL GELATT, JR.            NMT Corporation
            Director                         2004 Kramer Street
            Member, Executive Committee      La Crosse, WI  54603
              Chair, Human Resources 
              Committee

            G. DAVID HURD                    The Principal Financial Group
            Director                         Des Moines, IA  50392
            Member, Executive and                                          
              Nominating Committees

            THEODORE M. HUTCHISON            4019 Oak Forest Drive    
            Director                         Des Moines, IA  50312
            Member, Nominating Committees

            CHARLES S. JOHNSON               Pioneer Hi-Bred International, Inc.
            Director                         400 Locust, Ste. 700 Capital Square
            Member, Audit Committee          Des Moines, IA 50309

            WILLIAM T. KERR                  Meredith Corporation
            Director                         1716 Locust St.
            Member, Executive Committee      Des Moines, IA  50309-3023
              and Chair, Nominating 
              Committee

            LEE LIU                          IES Industries Inc.
            Director                         Post Office Box 351
            Member, Executive and            Cedar Rapids, IA  52406
              Human Resources Committees

            VICTOR. H. LOEWENSTEIN           Egon Zehnder International
            Director                         350 Park Avenue - 8th Floor
            Member, Audit                    New York, NY  10022
              Committee

            RONALD D. PEARSON                Hy-Vee, Inc.
            Director                         5820 Westown Parkway
            Member, Human Resources          West Des Moines, IA  50266
              Committee

            JOHN R. PRICE                    The Chase Manhattan Corporation
            Director                         270 Park Avenue - 44th Floor
            Member, Nominating Committee     New York, NY  10017

            DONALD M. STEWART                The College Board
            Director                         45 Columbus Avenue
            Member, Human Resources          New York, NY  10023-6992
              Committee

            ELIZABETH E. TALLETT             Dioscor, Inc.
            Director                         48 Federal Twist Road
            Chair, Audit Committee           Stockton, NJ  08559

            DEAN D. THORNTON                 1602- 34 Court West
            Director                         Seattle, WA  98199
            Member, Audit Committee 

            FRED W. WEITZ                    Essex Meadows, Inc.
            Director                         800 Second Avenue, Suite 150
            Member, Human Resources          Des Moines, IA  50309
              Committee

            Executive Officers (Other than Directors):

            JOHN E. ASCHENBRENNER            Senior Vice President

            DENNIS P. FRANCIS                Senior Vice President

            THOMAS J. GAARD                  Senior Vice President

            MICHAEL H.GERSIE                 Senior Vice President

            THOMAS J. GRAF                   Senior Vice President

            J. BARRY GRISWELL                Executive Vice President

            RONALD E. KELLER                 Executive Vice President

            GREGG R. NARBER                  Senior Vice President and
                                             General Counsel

            MARY A. O'KEEFE                  Senior Vice President

            RICHARD L. PREY                  Senior Vice President

            CARL C. WILLIAMS                 Senior Vice President and Chief
                                             Information Officer

Item 26.  Persons Controlled by or Under Common Control with Depositor

              Principal Mutual Life Insurance Company (incorporated as a
              mutual life insurance company under the laws of Iowa);

              Sponsored the  organization of the following mutual funds,
              some of which it  controls  by  virtue  of  owning  voting
              securities:

               Principal  Balanced Fund, Inc.(a Maryland  Corporation)  0.74% of
               shares  outstanding  owned by  Principal  Mutual  Life  Insurance
               Company  (including  subsidiaries  and affiliates) on January 30,
               1998.

               Principal Blue Chip Fund, Inc.(a Maryland  Corporation)  0.95% of
               shares  outstanding  owned by  Principal  Mutual  Life  Insurance
               Company  (including  subsidiaries  and affiliates) on January 30,
               1998.

               Principal Bond Fund, Inc.(a Maryland Corporation) 1.35% of shares
               outstanding  owned by  Principal  Mutual Life  Insurance  Company
               (including subsidiaries and affiliates) on January 30, 1998.

               Principal  Capital  Value Fund,  Inc.  (a  Maryland  Corporation)
               27.36% of  outstanding  shares  owned by  Principal  Mutual  Life
               Insurance  Company  (including  subsidiaries  and  affiliates) on
               January 30, 1998.

               Principal Cash  Management  Fund,  Inc. (a Maryland  Corporation)
               2.34% of  outstanding  shares  owned  by  Principal  Mutual  Life
               Insurance  Company  (including  subsidiaries  and  affiliates) on
               January 30, 1998.

               Principal  Government  Securities  Income Fund,  Inc. (a Maryland
               Corporation)  0.40% of  shares  outstanding  owned  by  Principal
               Mutual  Life  Insurance  Company   (including   subsidiaries  and
               affiliates) on January 30, 1998.

               Principal  Growth Fund,  Inc. (a Maryland  Corporation)  0.48% of
               outstanding  shares  owned by  Principal  Mutual  Life  Insurance
               Company  (including  subsidiaries  and affiliates) on January 30,
               1998.

               Principal High Yield Fund, Inc. (a Maryland  Corporation)  16.72%
               of shares  outstanding  owned by Principal  Mutual Life Insurance
               Company  (including  subsidiaries  and affiliates) on January 30,
               1998.

               Principal  International  Emerging Markets Fund, Inc. (a Maryland
               Corporation)  66.10% of  shares  outstanding  owned by  Principal
               Mutual  Life  Insurance  Company   (including   subsidiaries  and
               affiliates) on January 30, 1998.

               Principal  International  Fund,  Inc.  (a  Maryland  Corporation)
               23.63% of  shares  outstanding  owned by  Principal  Mutual  Life
               Insurance  Company  (including  subsidiaries  and  affiliates) on
               January 30, 1998.

               Principal   International   SmallCap   Fund,   Inc.  (a  Maryland
               Corporation)  61.51% of  shares  outstanding  owned by  Principal
               Mutual  Life  Insurance  Company   (including   subsidiaries  and
               affiliates) on January 30, 1998.

               Principal  Limited Term Bond Fund, Inc. (a Maryland  Corporation)
               45.48% of  shares  outstanding  owned by  Principal  Mutual  Life
               Insurance  Company(including   subsidiaries  and  affiliates)  on
               January 30, 1998.

               Principal  MidCap Fund,  Inc. (a Maryland  Corporation)  0.60% of
               shares  outstanding  owned by  Principal  Mutual  Life  Insurance
               Company  (including  subsidiaries  and affiliates) on January 30,
               1998

               Principal Real Estate Fund, Inc. (a Maryland  Corporation) 95.34%
               of shares  outstanding  owned by Principal  Mutual Life Insurance
               Company  (including  subsidiaries  and affiliates) on January 30,
               1998

               Principal SmallCap Fund, Inc.(a Maryland  Corporation)  88.70% of
               shares  outstanding  owned by  Principal  Mutual  Life  Insurance
               Company  (including  subsidiaries  and affiliates) on January 30,
               1998

               Principal  Special  Markets Fund,  Inc. (a Maryland  Corporation)
               96.92%  of  shares  outstanding  of  the  International  Emerging
               Markets  Portfolio,  50.28%  of  the  shares  outstanding  of the
               International Securities Portfolio,  96.87% of shares outstanding
               of the  International  SmallCap  Portfolio and 100% of the shares
               outstanding  of the  Mortgage-Backed  Securities  Portfolio  were
               owned by  Principal  Mutual  Life  Insurance  Company  (including
               subsidiaries and affiliates) on January 30, 1998

               Principal  Tax-Exempt  Bond Fund,  Inc. (a Maryland  Corporation)
               0.56% of  shares  outstanding  owned  by  Principal  Mutual  Life
               Insurance  Company  (including  subsidiaries  and  affiliates) on
               January 30, 1998.

               Principal  Tax-Exempt  Cash  Management  Fund,  Inc.  (a Maryland
               Corporation)  0.99% of  shares  outstanding  owned  by  Principal
               Mutual  Life  Insurance  Company   (including   subsidiaries  and
               affiliates) on January 30, 1998.

               Principal Utilities Fund, Inc. (a Maryland  Corporation) 1.45% of
               shares  outstanding  owned by  Principal  Mutual  Life  Insurance
               Company  (including  subsidiaries  and affiliates) on January 30,
               1998.

               Principal Variable Contracts Fund, Inc. (a Maryland  Corporation)
               100% of shares  outstanding  of the following  Accounts  owned by
               Principal Mutual Life Insurance Company and its Separate Accounts
               on  January  30,  1998:   Aggressive  Growth,  Asset  Allocation,
               Balanced,  Bond, Capital Value,  Government  Securities,  Growth,
               High Yield, International, MidCap and Money Market.

          Subsidiaries  organized  and  wholly-owned  by  Principal  Mutual Life
          Insurance Company:

               a.   Principal  Holding  Company (an Iowa  Corporation) A holding
                    company  wholly-owned  by  Principal  Mutual Life  Insurance
                    Company.

               b.   PT  Asuransi Jiwa Principal Egalita Indonesia  (an Indonesia
                    Corporation)

          Subsidiaries wholly-owned by Principal Holding Company:

               a.   Petula Associates,  Ltd. (an Iowa Corporation) a real estate
                    development company.

               b.   Patrician Associates, Inc. (a California Corporation) a real
                    estate development company.

               c.   Principal   Development   Associates,   Inc.  (a  California
                    Corporation) a real estate development company.

               d.   Princor Financial Services Corporation (an Iowa Corporation)
                    a registered broker-dealer.

               e.   Invista  Capital  Management,  Inc. (an Iowa  Corporation) a
                    registered investment adviser.

               f.   Principal Marketing Services,  Inc. (a Delaware Corporation)
                    a  corporation  formed  to  serve  as an  interface  between
                    marketers and manufacturers of financial services products.

               g.   The Principal Financial Group, Inc. (a Delaware corporation)
                    a general  business  corporation  established  in connection
                    with the new corporate identity. It is not currently active.

               h.   Delaware  Charter  Guarantee  & Trust  Company  (a  Delaware
                    Corporation) a nondepository trust company.

               i.   The Admar  Group,  Inc. (a Florida  Corporation)  a national
                    managed care service organization that developes and manages
                    preferred provider organizations.

               j.   Principal   Health  Care,  Inc.  (an  Iowa   Corporation)  a
                    developer and administrator of managed care systems.

               k.   Principal Financial  Advisors,  Inc. (an Iowa Corporation) a
                    registered investment advisor.

               l.   Principal  Asset  Markets,  Inc.  (an  Iowa  Corporation)  a
                    residential mortgage loan broker.

               m.   Principal Portfolio  Services,  Inc. (an Iowa Corporation) a
                    mortgage due diligence company.

               n.   Principal  International,   Inc.  (an  Iowa  Corporation)  a
                    company  formed for the  purpose of  international  business
                    development.

               o.   Principal   Spectrum   Associates,    Inc.   (a   California
                    Corporation) a real estate development company.

               p.   Principal Commercial Advisors,  Inc. (an Iowa Corporation) a
                    company that  purchases,  manages and sells  commercial real
                    estate assets.

               q.   Principal FC, Ltd. (an Iowa  Corporation) a limited  purpose
                    investment corporation.

               r.   Principal Residential Mortgage, Inc. (an Iowa Corporation) a
                    residential mortgage loan broker.

               s.   Equity FC, Ltd. (an Iowa Corporation)  engaged in investment
                    transactions   including  limited  partnership  and  limited
                    liability companies.

          Subsidiaries  organized and wholly-owned by Princor Financial Services
          Corporation:

               a.   Principal  Management Corporation  (an  Iowa  Corporation) a
                    registered investment advisor.

               b.   Principal Investors Corporation (a New Jersey Corporation) a
                    registered   broker-dealer  with  the  Securities   Exchange
                    Commission. It is not currently active.

          Subsidiary wholly owned by Delaware Charter Guarantee & Trust Company:

               a.   Trust  Consultants,   Inc.  (a  California   Corporation)  a
                    Consulting and Administration of Employee Benefit Plans.

          Subsidiaries  organized  and  wholly-owned  by Principal  Health Care,
          Inc.:

               a.   Principal  Health  Care  Management   Corporation  (an  Iowa
                    Corporation)   provide   management   services   to   health
                    maintenance organizations.

               b.   Principal  Health  Care  of the  Carolinas,  Inc.  (a  North
                    Carolina Corporation) a health maintenance organization.

               c.   Principal   Health  Care  of  Delaware,   Inc.  (a  Delaware
                    Corporation) a health maintenance organization.

               d.   Principal   Health   Care  of   Florida,   Inc.  (a  Florida
                    Corporation) a health maintenance organization.

               e.   Principal   Health   Care  of   Georgia,   Inc.  (a  Georgia
                    Corporation) a health maintenance organization.

               f.   Principal  Health  Care  of  Illinois,   Inc.  (an  Illinois
                    Corporation) a health maintenance organization.

               g.   Principal   Health  Care  of   Indiana,   Inc.  (a  Delaware
                    Corporation) a health maintenance organization.

               h.   Principal Health Care of Iowa, Inc. (an Iowa  Corporation) a
                    health maintenance organization.

               i.   Principal  Health  Care of Kansas  City,  Inc.  (a  Missouri
                    Corporation) a health maintenance organization.

               j.   Principal  Health  Care  of  Louisiana,  Inc.  (a  Louisiana
                    Corporation) a health maintenance organization.

               k.   Principal   Health  Care  of  Nebraska,   Inc.  (a  Nebraska
                    Corporation) a health maintenance organization.

               l.   Principal Health Care of Pennsylvania,  Inc. (a Pennsylvania
                    Corporation) a health  maintenance  organization. 

               m.   Principal  Health  Care  of  St.  Louis,  Inc.  (a  Delaware
                    Corporation) a health maintenance organization.

               n.   Principal  Health  Care of  South  Carolina,  Inc.  (A South
                    Carolina Corporation) a health maintenance organization.

               o.   Principal  Health  Care  of  Tennessee,  Inc.  (a  Tennessee
                    Corporation) a health maintenance organization.

               p.   Principal Health Care of Texas, Inc. ( a Texas  Corporation)
                    a health maintenance organization.

               q.   United  Health  Care   Services  of  Iowa,   Inc.  (an  Iowa
                    Corporation) a health maintenance organization.

          Subsidiary owned by The Admar Group, Inc.:

               a.   Admar Corporation (a California  Corporation) a managed care
                    services organization.

               b.   Admar Insurance Marketing, Inc. (a California Corporation) a
                    managed care services organization.

               c.   Benefit Plan Administrators, Inc. (a Colorado Corporation) a
                    managed care services organization.

               d.   SelectCare Management Co., Inc. (a California Corporation) a
                    managed care services organization.

               e.   Image  Financial & Insurance  Services,  Inc. (a  California
                    Corporation) a managed care services organization.

               f.   WM. G.  Hofgard & Co.,  Inc. (a  California  Corporation)  a
                    managed care services organization.

          Subsidiary owned by Petula Associates, Ltd.

               a.   Magnus Properties, Inc. (an Iowa Corporation) which owns   
                    real estate.

          Subsidiaries owned by Principal International, Inc.:

               a.   Principal Insurance Company (Hong Kong) Limited (a Hong Kong
                    Corporation) group life and group pension products.

               b.   Principal  International   Argentina,   S.A.  (an  Argentina
                    services corporation).

               c.   Principal   International   Asia   Limited   (a  Hong   Kong
                    Corporation)   a   corporation   operating   as  a  regional
                    headquarters for Asia.

               d.   Principal    International   de   Chile,   S.A.   (a   Chile
                    Corporation) a holding company.

               e.   Principal  International  Espana, S.A. de Seguros de Vida (a
                    Spain  Corporation)  a life  insurance  company  (individual
                    group), annuities and pension.

               f.   Principal Mexico Compania de Seguros, S.A. de C.V. (a Mexico
                    Corporation)  a  life  insurance  company   (individual  and
                    group), personal accidents.

               g.   Qualitas   Medica,   S.A.  (an   Argentina   HMO)  a  health
                    maintenance organization.

               h.   Afore Confia-Principal, S.a. de C.V. (a Mexico Corporation),
                    pension.

               i.   Zao Principal International (a Russia Corporation) inactive.

               j.   Principal  Trust  Company  (Asia)  Limited  (an  Asia  trust
                    company).

               k.   Principal Asset Management Company (Asia) Ltd. (Hong Kong)
                    a corporation which manages pension funds.

          Subsidiaries  owned by Principal International Argentina, S.A.:

               a.   Ethika  Administradora  de Fondos de Jubilaciones y Pensions
                    S.A. (an Argentina company) a pension company.

               b.   Principal Compania de Seguros de Retiro,  S.A. (an Argentina
                    Corporation) an individual annuity/employee benefit company.

               c.   Principal  Life  Compania de  Seguros,  S.A.  (an  Argentina
                    Corporation) a life insurance company.

          Subsidiary owned by Principal International de Chile, S.A.:

               a.   BanRenta   Compania  de  Seguros  de  Vida,  S.A.  (a  Chile
                    Corporation) group life and supplemental health,  individual
                    annuities.

          Subsidiary owned by Principal International Espana, S.A. de Seguros de
          Vida:

               a.   Princor  International Espana Sociedad Anonima de Agencia de
                    Seguros (a Spain Corporation) an insurance agency.

          Subsidiary owned by Afore Confia-Principal, S.A. de C.V.:

               a.   Siefore Confia-Principal, S.A. de C.V. (a Mexico 
                    Corporation) an investment fund company.

Item 27.  Number of Contractowners - As of: December 31, 1997             

                     (1)                          (2)               (3)
                                             Number of Plan      Number of
          Title of Class                      Participants     Contractowners
          --------------                     --------------    --------------
          BFA Variable Annuity Contracts                98           10
          Pension Builder Contracts                  1,256        1,530
          Personal Variable Contracts                4,230          138
          Premier Variable Contracts                16,228          289  
          Flexible Variable Annuity Contract        23,106       23,106

Item 28.  Indemnification

               None

Item 29.       Principal Underwriters

     (a) Princor  Financial  Services  Corporation,  principal  underwriter  for
Registrant,  acts as principal  underwriter for,  Principal Balanced Fund, Inc.,
Principal Blue Chip Fund,  Inc.,  Principal Bond Fund, Inc.,  Principal  Capital
Value Fund, Inc.,  Principal Cash Management Fund,  Inc.,  Principal  Government
Securities Income Fund, Inc.,  Principal Growth Fund, Inc., Principal High Yield
Fund, Inc.,  Principal  International  Emerging  Markets Fund,  Inc.,  Principal
International Fund, Inc., Principal International SmallCap Fund, Inc., Principal
Limited Term Bond Fund, Inc., Principal MidCap Fund, Inc., Principal Real Estate
Fund, Inc., Principal SmallCap Fund, Inc., Principal Special Markets Fund, Inc.,
Principal Tax-Exempt Bond Fund, Inc., Principal Tax-Exempt Cash Management Fund,
Inc.,  Principal  Utilities Fund, Inc.,  Principal Variable Contracts Fund, Inc.
and for  variable  annuity  contracts  participating  in  Principal  Mutual Life
Insurance  Company  Separate  Account B, a registered unit investment  trust for
retirement  plans  adopted  by  public  school  systems  or  certain  tax-exempt
organizations  pursuant to Section 403(b) of the Internal Revenue Code,  Section
457 retirement plans,  Section 401(a)  retirement plans,  certain non- qualified
deferred  compensation  plans and  Individual  Retirement  Annuity Plans adopted
pursuant to Section 408 of the Internal  Revenue  Code,  and for  variable  life
insurance  contracts issued by Principal Mutual Life Insurance  Company Variable
Life Separate Account, a registered unit investment trust.

  (b)      (1)                 (2)                            (3)
                               Positions
                               and offices                    Positions and
  Name and principal           with principal                 offices with
  business address             underwriter                    registrant

     Robert W. Baehr          Marketing Services             None
     The Principal            Officer
     Financial Group
     Des Moines, IA 50392

     Craig L. Bassett         Treasurer                      Treasurer
     The Principal
     Financial Group
     Des Moines, IA 50392

     Michael J. Beer          Senior Vice President and      Vice President
     The Principal            Chief Operating Officer
     Financial Group
     Des Moines, IA 50392

     Mary L. Bricker          Assistant Corporate            None
     The Principal            Secretary
     Financial Group
     Des Moines, IA 50392

     Lynn A. Brones           Vice President -               None
     The Principal            Investment Network
     Financial Group
     Des Moines, IA 50392

     David J. Drury           Director                       None
     The Principal
     Financial Group
     Des Moines, IA 50392

     Arthur S. Filean         Vice President                 Vice President
     The Principal                                           and Secretary
     Financial Group
     Des Moines, IA 50392

     Paul N. Germain          Vice President -               None
     The Principal            Operations
     Financial Group
     Des Moines, IA  50392

     Ernest H. Gillum         Assistant Vice President -     Assistant
     The Principal            Registered Products            Secretary
     Financial Group
     Des Moines, IA 50392

     William C. Gordon        Insurance License Officer      None
     The Principal            
     Financial Group          
     Des Moines, IA 50392

     Thomas J. Graf           Director                       None
     The Principal            
     Financial Group
     Des Moines, IA 50392

     J. Barry Griswell        Director and                   Director and
     The Principal            Chairman of the                Chairman of the
     Financial Group          Board                          Board
     Des Moines, IA 50392

     Joyce N. Hoffman         Vice President and             None
     The Principal            Corporate Secretary
     Financial Group
     Des Moines, IA 50392

     Stephan L. Jones         Director and                   Director and
     The Principal            President                      President
     Financial Group
     Des Moines, IA 50392

     Ronald E. Keller         Director                       Director
     The Principal
     Financial Group
     Des Moines, IA 50392

     John R. Lepley           Senior Vice                    None
     The Principal            President - Marketing
     Financial Group          and Distribution
     Des Moines, IA 50392

     Gregg R. Narber          Director                       None
     The Principal            
     Financial Group
     Des Moines, IA 50392

     Mark M. Oswald           Compliance Officer             None
     The Principal
     Financial Group
     Des Moines, IA 50392

     Kelly A. Paul            Systems/Technology -           None
     The Principal            Officer
     Financial Group
     Des Moines, IA 50392

     Layne A. Rasmussen       Controller -                   None
     The Principal            Mutual Funds 
     Financial Group
     Des Moines, IA 50392

     Martin R. Richardson     Operations Officer -           None
     The Principal            Broker/Dealer Services
     Financial Group
     Des Moines, IA 50392

     Elizabeth R. Ring        Controller                     None
     The Principal
     Financial Group
     Des Moines, IA 50392

     Michael D. Roughton      Counsel                        Counsel
     The Principal
     Financial Group
     Des Moines, IA 50392

     Jean B. Schustek         Product Compliance Officer -   None
     The Principal            Registered Products
     Financial Group
     Des Moines, IA  50392

     Kyle R. Selberg          Vice President-Marketing       None
     The Principal
     Financial Group
     Des Moines, IA 50392

     Susan R. Sorensen        Marketing Officer              None
     The Principal
     Financial Group
     Des Moines, IA 50392

     Roger C. Stroud          Assistant Director -           None
     The Principal            Marketing
     Financial Group
     Des Moines, IA 50392

           (c)        (1)                       (2)
           
                                      Net Underwriting
            Name of Principal           Discounts and
               Underwriter               Commissions

            Princor Financial           $11,853,406.08
            Services Corporation

                   (3)                       (4)                 (5)

             Compensation on             Brokerage
                Redemption              Commissions         Compensation

                     0                       0                    0

Item 30.  Location of Accounts and Records

          All accounts,  books or other  documents of the Registrant are located
          at the offices of the Depositor,  The Principal  Financial  Group, Des
          Moines, Iowa 50392.

Item 31.  Management Services

          Inapplicable

Item 32.  Undertakings

          The Registrant  undertakes that in restricting  cash  withdrawals from
          Tax  Sheltered  Annuities  to  prohibit  cash  withdrawals  before the
          Participant  attains age 59 1/2,  separates  from  service,  dies,  or
          becomes  disabled  or in the  case  of  hardship,  Registrant  acts in
          reliance of SEC No Action Letter addressed to American Counsel of Life
          Insurance (available November 28, 1988). Registrant further undertakes
          that:

          1.   Registrant  has included  appropriate  disclosure  regarding  the
               redemption  restrictions  imposed  by Section  403(b)(11)  in its
               registration  statement,   including  the  prospectus,   used  in
               connection with the offer of the contract;

          2.   Registrant  will include  appropriate  disclosure  regarding  the
               redemption  restrictions  imposed  by Section  403(b)(11)  in any
               sales  literature  used  in  connection  with  the  offer  of the
               contract;

          3.   Registrant will instruct sales  representatives  who solicit Plan
               Participants  to purchase the contract  specifically to bring the
               redemption  restrictions  imposed  by Section  403(b)(11)  to the
               attention of the potential Plan Participants; and

          4.   Registrant will obtain from each Plan Participant who purchases a
               Section 403(b) annuity contract,  prior to or at the time of such
               purchase, a signed statement acknowledging the Plan Participant's
               understanding  of (a) the  restrictions on redemption  imposed by
               Section 403(b)(11), and (b) the investment alternatives available
               under the  employer's  Section 403(b)  arrangement,  to which the
               Plan Participant may elect to transfer his contract value.

  REPRESENTATION PURSUANT TO SECTION 26 OF THE INVESTMENT COMPANY ACT OF 1940

Principal Mutual Life Insurance Company represents the fees and charges deducted
under the Policy,  in the aggregate,  are reasonable in relation to the services
rendered,  the expenses  expected to be incurred,  and the risks  assumed by the
Company.
<PAGE>
                                   SIGNATURES

         Pursuant  to the  requirements  of the  Securities  Act of 1933 and the
Investment Company Act of 1940, the Registrant,  Principal Mutual Life Insurance
Company  Separate  Account  B,  certifies  that it  meets  the  requirements  of
Securities Act Rule 485(a) for  effectiveness of the Registration  Statement and
has duly caused this Amendment to the Registration Statement to be signed on its
behalf by the undersigned  thereto duly authorized in the City of Des Moines and
State of Iowa, on the 24th day of February, 1998

                         PRINCIPAL MUTUAL LIFE INSURANCE COMPANY
                         SEPARATE ACCOUNT B

                                 (Registrant)


                         By:  PRINCIPAL MUTUAL LIFE INSURANCE COMPANY

                                 (Depositor)

                                   /s/ David J. Drury
                         By ______________________________________________
                              David J. Drury
                              Chairman and Chief Executive Officer

Attest:

/s/ Joyce N. Hoffman
- -----------------------------------
Joyce N. Hoffman
Vice President and
  Corporate Secretary


As required by the  Securities Act of 1933,  this Amendment to the  Registration
Statement has been signed by the following  persons in the capacities and on the
date indicated.

Signature                          Title                           Date


/s/ D. J. Drury                Chairman and                    February 24, 1998
- --------------------           Chief Executive Officer
D. J. Drury



/s/ D. C. Cunningham           Vice President and              February 24, 1998
- --------------------           Controller (Principal
D. C. Cunningham               Accounting Officer)



/s/ M. H. Gersie               Senior Vice President           February 24, 1998
- --------------------           (Principal Financial
M. H. Gersie                   Officer)


  (M. V. Andringa)*            Director                        February 24, 1998
- --------------------
M. V. Andringa


  (R. M. Davis)*               Director                        February 24, 1998
- --------------------
R. M. Davis


  (C. D. Gelatt, Jr.)*         Director                        February 24, 1998
- --------------------
C. D. Gelatt, Jr.


  (G. D. Hurd)*                Director                        February 24, 1998
- --------------------
G. D. Hurd


  (T. M. Hutchison)*           Director                        February 24, 1998
- --------------------
T. M. Hutchison


  (C. S. Johnson)*             Director                        February 24, 1998
- --------------------
C. S. Johnson


  (W. T. Kerr)*                Director                        February 24, 1998
- --------------------
W. T. Kerr


  (L. Liu)*                    Director                        February 24, 1998
- --------------------
L. Liu


  (V. H. Loewenstein)*         Director                        February 24, 1998
- --------------------
V. H. Loewenstein


  (R. D. Pearson)*             Director                        February 24, 1998
- --------------------
R. D. Pearson


  (J. R. Price)*               Director                        February 24, 1998
- --------------------
J. R. Price, Jr.


  (D. M. Stewart)*             Director                        February 24, 1998
- --------------------
D. M. Stewart


  (E. E. Tallett)*             Director                        February 24, 1998
- --------------------
E. E. Tallett


  (D. D. Thornton)*            Director                        February 24, 1998
- --------------------
D. D. Thornton


  (F. W. Weitz)*               Director                        February 24, 1998
- --------------------
F. W. Weitz


                           *By    /s/ David J. Drury
                                  ------------------------------------
                                  David J. Drury
                                  Chairman and Chief Executive Officer

                                  Pursuant to Powers of Attorney
                                  Previously Filed or Included Herein

    


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