Interest and estimate penalty rates

Current rates

6% Personal income tax under- and overpayments
6% Corporation underpayment
6% Estimate penalties
2% Corporation overpayments

Previous rates

*Personal income tax underpayment and overpayment, corporation underpayment, and estimate penalty rate.
From To Interest rate* Corporation overpayment rate
01/01/2019 06/30/2019 5% 2%
07/01/2017 12/31/2018 4% 1%
01/01/2017 06/30/2017 4% 0%
07/01/2012 12/31/2016 3% 0%
01/01/2012 06/30/2012 4% 0%
07/01/2011 12/31/2011 3% 0%
01/01/2010 06/30/2011 4% 0%
07/01/2009 12/31/2009 5% 0%
01/01/2009 06/30/2009 5% 2%
07/01/2008 12/31/2008 7% 3%
01/01/2007 06/30/2008 8% 5%
07/01/2006 12/31/2006 7% 4%
01/01/2006 06/30/2006 6% 3%
07/01/2005 12/31/2005 5% 2%
07/01/2004 06/30/2005 4% 1%
07/01/2003 06/30/2004 5% 1%
07/01/2002 06/30/2003 6% 2%
01/01/2002 06/30/2002 7%
01/01/2001 12/31/2001 9%
01/01/2000 12/31/2000 8%
07/01/1999 12/31/1999 7%
01/01/1999 06/30/1999 8%
07/01/1995 12/31/1998 9%
01/01/1995 06/30/1995 8%
07/01/1993 12/31/1994 7%
01/01/1993 06/30/1993 8%
07/01/1992 12/31/1992 9%
07/01/1991 06/30/1992 10%
01/01/1990 06/30/1991 11%
07/01/1989 12/31/1989 12%
10/01/1988 06/30/1989 11%
04/01/1988 09/30/1988 10%
01/01/1988 03/31/1988 11%
10/01/1987 12/31/1987 10%
01/01/1987 09/30/1987 8%
07/01/1986 12/31/1986 9%
01/01/1986 06/30/1986 10%
07/01/1985 12/31/1985 11%
01/01/1985 06/30/1985 13%
07/01/1983 12/31/1984 11%
03/01/1983 06/30/1983 16%
01/01/1983 02/28/1983 14%
05/27/1982 12/31/1982 18%
01/01/1976 05/26/1982 12%
Before 01/01/1976 Before 01/01/1976 6%