<PAGE>
SUPPLEMENT DATED OCTOBER 10, 2000
TO
PROSPECTUS DATED MAY 1, 2000
AS SUPPLEMENTED AUGUST 14, 2000
AND SEPTEMBER 22, 2000
FOR
FUTURITY VARIABLE UNIVERSAL LIFE INSURANCE
ISSUED BY SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
Effective immediately, the Prospectus dated May 1, 2000 As Supplemented
August 14, 2000 and September 22, 2000 (the "Prospectus") for Futurity Variable
Universal Life Insurance is supplemented as follows:
The following paragraph replaces the first paragraph on page 32 of the
Prospectus:
"The Mortality and Expense Risk Charge will be determined by us
from time to time based on our expectations of future interest,
mortality costs, persistency, expenses and taxes, but will not
exceed 0.60% annually for Policy Years 1 through 10 and 0.20%
annually thereafter. Currently, the charge is 0.60% annually for
Policy Years 1 through 10 and 0.20% annually thereafter."
THIS SUPPLEMENT IS NOT VALID UNLESS ACCOMPANIED OR PRECEDED BY THE CURRENT
PROSPECTUS FOR FUTURITY VARIABLE UNIVERSAL LIFE INSURANCE. THIS SUPPLEMENT AND
THE PROSPECTUS SHOULD BE READ AND RETAINED FOR FURTHER REFERENCE.
