Exhibit 23 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 333-72491, No. 333-576, No. 333-578, No. 333-580, No. 333-582, No. 333-24929 and No. 333-31397) of our report dated February 1, 2001 relating to the financial statements, which appears in the Allmerica Financial Corporation 2000 Annual Report to Shareholders, which is incorporated in this Annual Report on Form 10-K for the year ended December 31, 2000. We also consent to the incorporation by reference of our report dated February 1, 2001 relating to the financial statement schedules, which appears in this Form 10-K. /s/ PricewaterhouseCoopers LLP PricewaterhouseCoopers LLP Boston, Massachusetts March 30, 2001