Interest Rates, 1992 to Present

These rates are used to calculate interest on overdue payments owed by taxpayers to Maine Revenue Services, as well as to calculate interest on overdue refunds owed by MRS to taxpayers.
The annual rates are compounded monthly
Effective dates	Annual rate	Monthly rate
1/1/92 - 12/31/92	12%	1.0000%
1/1/93 - 12/31/94	10%	0.8333%
1/1/95 - 12/31/96	11%	0.9167%
1/1/97 - 12/31/98	10%	0.8333%
1/1/99 - 12/31/01	9%	0.7500%
1/1/02 - 12/31/02	8%	0.6667%
1/1/03 - 12/31/03	7%	0.5833%
1/1/04 - 7/1/04	6%	0.5000%
7/1/04 - 12/31/04	7%	0.5833%
1/1/05 - 12/31/05	8%	0.6667%
1/1/06 - 12/31/06	10%	0.8333%
1/1/07 - 12/31/07	12%	1.0000%
1/1/08 - 12/31/08	12%	1.0000%