<PAGE>
AMENDMENT NO. 1 TO
EXHIBIT A
OF THE INVESTMENT MANAGEMENT AGREEMENT
THIS EXHIBIT to the Investment Management Agreement between DELAWARE
GROUP PREMIUM FUND and DELAWARE MANAGEMENT COMPANY (the "Agreement") amended as
of the day of August, 2000 adds the Technology and Innovation Series for which
the Investment Manager provides investment management services pursuant to the
Agreement dated December 15, 1999, along with the management fee rate schedule
for the Series and the date on which the Agreement became effective for the
Series.
<TABLE>
<CAPTION>
---------------------------------------- -------------------------------------- --------------------------------------
Series Name Effective Date Management Fee Schedule
(as a percentage of
average daily net assets)
Annual Rate
---------------------------------------- -------------------------------------- --------------------------------------
<S> <C> <C>
Balanced Series December 15, 1999 0.65% on first $500 million
0.60% on next $500 million
(formerly Delaware Balanced Series and 0.55% on next $500 million
Delaware Series) 0.50% on assets in excess of
$2,500 million
---------------------------------------- -------------------------------------- --------------------------------------
Capital Reserves Series December 15, 1999 0.50% on first $500 million
0.475% on next $500 million
0.45% on next $500 million
0.425% on assets in excess of
$2,500 million
---------------------------------------- -------------------------------------- --------------------------------------
Cash Reserve Series December 15, 1999 0.45% on first $500 million
0.40% on next $500 million
0.35% on next $500 million
0.30% on assets in excess of
$2,500 million
---------------------------------------- -------------------------------------- --------------------------------------
Convertible Securities Series December 15, 1999 0.75% on first $500 million
0.70% on next $500 million
0.65% on next $500 million
0.60% on assets in excess of
$2,500 million
---------------------------------------- -------------------------------------- --------------------------------------
Devon Series December 15, 1999 0.65% on first $500 million
0.60% on next $500 million
0.55% on next $500 million
0.50% on assets in excess of
$2,500 million
---------------------------------------- -------------------------------------- --------------------------------------
Growth and Income Series December 15, 1999 0.65% on first $500 million
0.60% on next $500 million
(formerly Decatur Total Return Series) 0.55% on next $500 million
0.50% on assets in excess of
$2,500 million
---------------------------------------- -------------------------------------- --------------------------------------
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
---------------------------------------- -------------------------------------- --------------------------------------
Series Name Effective Date Management Fee Schedule
(as a percentage of
average daily net assets)
Annual Rate
---------------------------------------- -------------------------------------- --------------------------------------
<S> <C> <C>
Growth Opportunities Series December 15, 1999 0.75% on first $500 million
0.70% on next $500 million
(formerly DelCap Series) 0.65% on next $500 million
0.60% on assets in excess of
$2,500 million
---------------------------------------- -------------------------------------- --------------------------------------
High Yield Series December 15, 1999 0.65% on first $500 million
0.60% on next $500 million
(formerly Delchester Series) 0.55% on next $500 million
0.50% on assets in excess of
$2,500 million
---------------------------------------- -------------------------------------- --------------------------------------
REIT Series December 15, 1999 0.75% on first $500 million
0.70% on next $500 million
0.65% on next $500 million
0.60% on assets in excess of
$2,500 million
---------------------------------------- -------------------------------------- --------------------------------------
Select Growth Series December 15, 1999 0.75% on first $500 million
0.70% on next $500 million
(formerly Aggressive Growth Series) 0.65% on next $1,500 million
0.60% on assets in excess of
$2,500 million
---------------------------------------- -------------------------------------- --------------------------------------
Small Cap Value Series December 15, 1999 0.75% on first $500 million
0.70% on next $500 million
0.65% on next $500 million
0.60% on assets in excess of
$2,500 million
---------------------------------------- -------------------------------------- --------------------------------------
Small Cap Value Series December 15, 1999 0.75% on first $500 million
0.70% on next $500 million
0.65% on next $500 million
0.60% on assets in excess of
$2,500 million
---------------------------------------- -------------------------------------- --------------------------------------
Social Awareness Series December 15, 1999 0.75% on first $500 million
0.70% on next $500 million
0.65% on next $500 million
0.60% on assets in excess of
$2,500 million
---------------------------------------- -------------------------------------- --------------------------------------
</TABLE>
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<PAGE>
<TABLE>
<CAPTION>
---------------------------------------- -------------------------------------- --------------------------------------
Series Name Effective Date Management Fee Schedule
(as a percentage of
average daily net assets)
Annual Rate
---------------------------------------- -------------------------------------- --------------------------------------
<S> <C> <C>
Social Awareness Series December 15, 1999 0.75% on first $500 million
0.70% on next $500 million
0.65% on next $500 million
0.60% on assets in excess of
$2,500 million
---------------------------------------- -------------------------------------- --------------------------------------
Strategic Income Series December 15, 1999 0.65% on first $500 million
0.60% on next $500 million
0.55% on next $500 million
0.50% on assets in excess of
$2,500 million
---------------------------------------- -------------------------------------- --------------------------------------
Technology and Innovation Series August 2000 0.75% on first $500 million
0.70% on next $500 million
0.65% on next $500 million
0.60% on assets in excess of
$2,500 million
---------------------------------------- -------------------------------------- --------------------------------------
Trend Series December 15, 1999 0.75% on first $500 million
0.70% on next $500 million
0.65% on next $500 million
0.60% on assets in excess of
$2,500 million
---------------------------------------- -------------------------------------- --------------------------------------
U.S. Growth Series December 15, 1999 0.65% on the first $500 million
0.60% on the next $500 million
0.55% on the next $1,500 million
0.50% on assets in excess of $2,500
million
---------------------------------------- -------------------------------------- --------------------------------------
</TABLE>
DELAWARE MANAGEMENT COMPANY, DELAWARE GROUP PREMIUM FUND
a series of Delaware Management Business Trust
By: By:
----------------------------------- ------------------------------
Name: Name:
--------------------------------- ----------------------------
Title: Title:
-------------------------------- ---------------------------
Attest: Attest:
------------------------------- --------------------------
Name: Name:
--------------------------------- ----------------------------
Title: Title:
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