Exhibit 99.1

                         ALLMERICA FINANCIAL CORPORATION
                    ANNOUNCES HURRICANE FRANCES LOSS ESTIMATE

WORCESTER,  Mass.,  September 23, 2004 - Allmerica Financial  Corporation (NYSE:
AFC) announced estimated pre-tax catastrophe losses of approximately $20 million
related to Hurricane Frances.

Estimated losses from Hurricane Frances combined with other  catastrophe  losses
eligible for  reinsurance  under the company's  property  catastrophe  aggregate
reinsurance  treaty  now  total $87  million  for the year to date.  Under  this
agreement  the  company   retains   approximately   $80  million  of  cumulative
catastrophe  losses for the year and can expect to cede approximately $7 million
of  Hurricane  Frances  losses  to  the  reinsurers,  subject  to a  10  percent
retention.  The net  benefit to the  company is expected to be about $6 million,
lowering the pre-tax loss impact from Hurricane  Frances to $14 million,  net of
reinsurance.

Under the terms of the reinsurance  agreement,  eligible  catastrophe losses for
the  remainder of 2004, up to a  maximum of $43 million,  will be covered by the
aggregate treaty subject to a 10 percent retention by the company.

Estimated pre-tax  catastrophe losses net of reinsurance for the quarter to date
are approximately  $57 million,  or $0.95 per share after taxes. The anticipated
charges  will  be  reflected  in the  company's  third  quarter  results.  Total
estimated  pre-tax  catastrophe  losses for the year to date are at $93 million,
net of reinsurance.

The company estimates that approximately 56% of the hurricane losses were in its
personal lines business, with the balance coming from commercial lines.

The company's property catastrophe aggregate reinsurance treaty protects against
multiple  catastrophes  within  a year.  The  treaty  provides  $50  million  of
reinsurance coverage in excess of cumulative losses in the year of approximately
$80 million.  For purposes of the $80 million  retention,  individual events are
capped at $30 million.  In addition,  the company retains 10% of the risk on the
$50 million coverage.

Allmerica  Financial  Corporation  is scheduled  to announce  its third  quarter
financial results on Monday, October 25.

Certain statements in this release, including the Company's estimates of pre-tax
catastrophe  losses,  may be  considered  to be  forward-looking  statements  as
defined in the  Private  Securities  Litigation  Reform Act of 1995.  Use of the
words "believes",  "anticipates",  "expects" and similar expressions is intended
to identify forward-looking  statements. The Company cautions investors that any
such  forward-looking  statements are not guarantees of future performance,  and
actual results could differ materially.

Investors are directed to consider the risks and  uncertainties  in our business
that may affect future  performance and that are discussed in readily  available
documents,  including the Company's  annual report and other  documents filed by
Allmerica  with the  Securities  and  Exchange  Commission  and  which  are also
available at www.allmerica.com under "Investor Relations".

These uncertainties include the difficulty in estimating  catastrophe losses, as
well as the  possibility of adverse  catastrophe  experience and severe weather,
adverse loss development and adverse trends in mortality and morbidity,  changes
in the stock and financial  markets,  changes from assumed surrender  activities
and assumed stock market returns,  adverse selection in underwriting  activities
and surrender patterns, investment impairments,  heightened competition, adverse
state and federal  legislation or regulation,  financial  ratings  actions,  and
various other  factors,  which  include the effect of the Company's  decision to
close its retail broker-dealer  operations as well as the anticipated impact and
cost of the GMDB hedging program.


Allmerica Financial  Corporation is the holding company for a group of insurance
companies headquartered in Worcester, Massachusetts.



CONTACTS:                  Investors:                Media:
                           Sujata Mutalik            Michael F. Buckley
                           (508) 855-3457            (508) 855-3099
                           smutalik@allmerica.com    mibuckley@allmerica.com