An Act relative to DOR interest rate parity

This bill (HD 1324) changes how interest is calculated on tax refunds issued by the Massachusetts Department of Revenue (DOR). It modifies Chapter 62C of the General Laws to require that when a refund (including tax, interest, or penalties) is paid, the state treasurer must repay the refund amount with interest at the rate set under Section 32 of the same chapter. The interest is calculated from the date of the overpayment up to 30 days before the refund check is issued, regardless of whether the taxpayer accepts the check. The changes take effect on January 1, 2026, directly affecting taxpayers who receive DOR refunds.