John Hancock Variable Series Trust I

Michele G. Van Leer
Chairman and Trustee

[GRAPHIC OMITTED]
                                                              July 2, 2001


Wellington Management Company, LLP
28 State Street
Boston, MA 02109

Attn: Katy D. Burke
      Assistant Vice President

Re:      Sub-Investment Management Agreement
         dated as of April 20, 1998
         -----------------------------------

Dear Ms. Burke:

         This letter will memorialize our mutual agreement to amend Schedule I
to the above-referenced Sub-Investment Management Agreement relating to the High
Yield Bond Portfolio, to adjust the current fee schedule, effective as of July
1, 2001. Attached is a revised copy of Schedule I which introduces a level 45
basis point charge on all Net Assets. Please substitute copies of the attached
Schedule I for the old copies of Schedule I in your files.

         Kindly acknowledge receipt of this letter and the attachment, and
indicate your agreement to the amendment of Schedule I, by signing and returning
the duplicate of this letter. Thank you.


JOHN HANCOCK                                         JOHN HANCOCK VARIABLE
LIFE INSURANCE COMPANY                               SERIES TRUST I


By: /s/ ROBERT R. REITANO                            By:/s/ MICHELE G. VAN LEER
    ---------------------                            ---------------------------
Robert R. Reitano                                    Michele G. Van Leer
Senior Vice President &                              Chairman and Trustee
Chief Investment Strategist

Received and agreed to:
Wellington Management Company, LLP


By: /s/ DUNCAN M. MCFARLAND
    -----------------------
Name:    Duncan m. McFarland
         -----------------------------
Title:   CEO, President , and Managing Partner






                                   SCHEDULE I
                              (As of July 1, 2001)

                                      FEES
                                      ----

High Yield Bond
- ---------------

- --------------------------------------------------------------------------------
Current Net Assets Under Management  Sub-Investment Management Fee
- --------------------------------------------------------------------------------
On all Net Assets                    Forty Five (45) basis points (0.45%)
- --------------------------------------------------------------------------------