WEBSTER, Mass.--Jan. 11, 2006--The Commerce Insurance Company announced today that it has filed with the Massachusetts Division of Insurance for a five percent (5%) discount from the 2006 private passenger automobile fixed and established rates for AAA members in Massachusetts.

If approved by the Division of Insurance, the discount would apply to eligible Massachusetts private passenger automobile policies for members of Massachusetts AAA clubs. This includes members of AAA Southern New England, AAA Merrimack Valley and Automobile Club of Pioneer Valley who are insured by The Commerce Insurance Company through a participating agent.

The Commerce Insurance Company, which is rated A+ (Superior) by A.M. Best, is the principal operating subsidiary of The Commerce Group, Inc. (NYSE - CGI) headquartered in Webster, Massachusetts. Additional property and casualty insurance subsidiaries include Citation Insurance Company in Massachusetts, Commerce West Insurance Company in California and American Commerce Insurance Company in Ohio. Through its subsidiaries' combined insurance activities, Commerce Group is ranked as the 19th largest personal automobile insurance group in the country by A.M. Best, based on 2004 direct written premium information.