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Over and Underpayment Rates

These rates of interest are determined on a quarterly basis. For taxpayers other than corporations, the overpayment and underpayment rate is the federal short-term rate plus 3 percentage points. Generally, in the case of a corporation, the underpayment rate is the federal short-term rate plus 3 percentage points and the overpayment rate is the federal short-term rate plus 2 percentage points.

The rate for large corporate underpayments is the federal short-term rate plus 5 percentage points. The rate on the portion of a corporate overpayment of tax exceeding $10,000 for a taxable period is the federal short-term rate plus one-half (0.5) of a percentage point.

These interest rates are computed from the federal short-term rate based on daily compounding.

The following tables illustrate the history of the interest rates on over and underpayments:

TABLE OF INTEREST RATES
PERIODS BEFORE JUL. 1, 1975 -- PERIODS ENDING DEC. 31, 1986
OVERPAYMENTS AND UNDERPAYMENTS

DAILY RATE TABLE
PERIOD	RATE
Before Jul. 1, 1975	6%
Jul. 1, 1975 -- Jan. 31, 1976	9%
Feb. 1, 1976 -- Jan. 31, 1978	7%
Feb. 1, 1978 -- Jan. 31, 1980	6%
Feb. 1, 1980 -- Jan. 31, 1982	12%
Feb. 1, 1982 -- Dec. 31, 1982	20%
Jan. 1, 1983 -- Jun. 30, 1983	16%
Jul. 1, 1983 -- Dec. 31, 1983	11%
Jan. 1, 1984 -- Jun. 30, 1984	11%
Jul. 1, 1984 -- Dec. 31, 1984	11%
Jan. 1, 1985 -- Jun. 30, 1985	13%
Jul. 1, 1985 -- Dec. 31, 1985	11%
Jan. 1, 1986 -- Jun. 30, 1986	10%
Jul. 1, 1986 -- Dec. 31, 1986	9%

TABLE OF INTEREST RATES FROM JAN. 1, 1987 -- Dec. 31, 1998

	OVERPAYMENTS	UNDERPAYMENTS
Jan. 1, 1987 -- Mar. 31, 1987	8%	9%
Apr. 1, 1987 -- Jun. 30, 1987	8%	9%
Jul. 1, 1987 -- Sep. 30, 1987	8%	9%
Oct. 1, 1987 -- Dec. 31, 1987	9%	10%
Jan. 1, 1988 -- Mar. 31, 1988	10%	11%
Apr. 1, 1988 -- Jun. 30, 1988	9%	10%
Jul. 1, 1988 -- Sep. 30, 1988	9%	10%
Oct. 1, 1988 -- Dec. 31, 1988	10%	11%
Jan. 1, 1989 -- Mar. 31, 1989	10%	11%
Apr. 1, 1989 -- Jun. 30, 1989	11%	12%
Jul. 1, 1989 -- Sep. 30, 1989	11%	12%
Oct. 1, 1989 -- Dec. 31, 1989	10%	11%
Jan. 1, 1990 -- Mar. 31, 1990	10%	11%
Apr. 1, 1990 -- Jun. 30, 1990	10%	11%
Jul. 1, 1990 -- Sep. 30, 1990	10%	11%
Oct. 1, 1990 -- Dec. 31, 1990	10%	11%
Jan. 1, 1991 -- Mar. 31, 1991	10%	11%
Apr. 1, 1991 -- Jun. 30, 1991	9%	10%
Jul. 1, 1991 -- Sep. 30, 1991	9%	10%
Oct. 1, 1991 -- Dec. 31, 1991	9%	10%
Jan. 1, 1992 -- Mar. 31, 1992	8%	9%
Apr. 1, 1992 -- Jun. 30, 1992	7%	8%
Jul. 1, 1992 -- Sep. 30, 1992	7%	8%
Oct. 1, 1992 -- Dec. 31, 1992	6%	7%
Jan. 1, 1993 -- Mar. 31, 1993	6%	7%
Apr. 1, 1993 -- Jun. 30, 1993	6%	7%
Jul. 1, 1993 -- Sep. 30, 1993	6%	7%
Oct. 1, 1993 -- Dec. 31, 1993	6%	7%
Jan. 1, 1994 -- Mar. 31, 1994	6%	7%
Apr. 1, 1994 -- Jun. 30, 1994	6%	7%
Jul. 1, 1994 -- Sep. 30, 1994	7%	8%
Oct. 1, 1994 -- Dec. 31, 1994	8%	9%
Jan. 1, 1995 -- Mar. 31, 1995	8%	9%
Apr. 1, 1995 -- Jun. 30, 1995	9%	10%
Jul. 1, 1995 -- Sep. 30, 1995	8%	9%
Oct. 1, 1995 -- Dec. 31, 1995	8%	9%
Jan. 1, 1996 -- Mar. 31, 1996	8%	9%
Apr. 1, 1996 -- Jun. 30, 1996	7%	8%
Jul. 1, 1996 -- Sep. 30, 1996	8%	9%
Oct. 1, 1996 -- Dec. 31, 1996	8%	9%
Jan. 1, 1997 -- Mar. 31, 1997	8%	9%
Apr. 1, 1997 -- Jun. 30, 1997	8%	9%
Jul. 1, 1997 -- Sep. 30, 1997	8%	9%
Oct. 1, 1997 -- Dec. 31, 1997	8%	9%
Jan. 1, 1998 -- Mar. 31, 1998	8%	9%
Apr. 1, 1998 -- Jun. 30, 1998	7%	8%
Jul. 1, 1998 -- Sep. 30, 1998	7%	8%
Oct. 1, 1998 -- Dec. 31, 1998	7%	8%

TABLE OF NONCORPORATE INTEREST RATES FROM JANUARY 1, 1999 -- PRESENT

	OVERPAYMENTS	UNDERPAYMENTS
Jan. 1, 1999 -- Mar. 31, 1999	7%	7%
Apr. 1, 1999 -- Jun. 30, 1999	8%	8%
Jul. 1, 1999 -- Sept. 30, 1999	8%	8%
Oct. 1, 1999 -- Dec. 31, 1999	8%	8%
Jan. 1, 2000 -- Mar. 31, 2000	8%	8%
Apr. 1, 2000 -- Jun. 30, 2000	9%	9%
Jul. 1, 2000 -- Sep. 30, 2000	9%	9%
Oct. 1, 2000 -- Dec. 31, 2000	9%	9%
Jan. 1, 2001 -- Mar. 31, 2001	9%	9%
Apr. 1, 2001-- Jun. 30, 2001	8%	8%
Jul. 1, 2001 -- Sept. 30, 2001	7%	7%
Oct. 1, 2001 -- Dec. 31, 2001	7%	7%
Jan. 1, 2002 -- Mar. 31, 2002	6%	6%
Apr. 1, 2002-- Jun. 30, 2002	6%	6%
Jul. 1, 2002 -- Sep. 30, 2002	6%	6%
Oct. 1, 2002 -- Dec. 31, 2002	6%	6%
Jan. 1, 2003 -- Mar. 31, 2003	5%	5%
Apr. 1, 2003-- Jun. 30, 2003	5%	5%
Jul. 1, 2003 -- Sep. 30, 2003	5%	5%
Oct. 1, 2003 -- Dec. 31, 2003	4%	4%
Jan. 1, 2004 -- Mar. 31, 2004	4%	4%
Apr. 1, 2004-- Jun. 30, 2004	5%	5%
Jul. 1, 2004 -- Sep. 30, 2004	4%	4%
Oct. 1, 2004 -- Dec. 31, 2004	5%	5%
Jan. 1, 2005 -- Mar. 31, 2005	5%	5%
Apr. 1, 2005 -- Jun. 30, 2005	6%	6%
Jul. 1, 2005 -- Sep. 30, 2005	6%	6%
Oct. 1, 2005 -- Dec. 31, 2005	7%	7%
Jan. 1, 2006 -- Mar. 31, 2006	7%	7%
Apr. 1, 2006 -- Jun. 30, 2006	7%	7%
Jul. 1, 2006 -- Sep. 30, 2006	8%	8%
Oct. 1, 2006 -- Dec. 31, 2006	8%	8%
Jan. 1, 2007 -- Mar. 31, 2007	8%	8%
Apr. 1, 2007 -- Jun. 30, 2007	8%	8%
Jul. 1, 2007 -- Sep. 30, 2007	8%	8%
Oct. 1, 2007 -- Dec. 31, 2007	8%	8%
Jan. 1, 2008 -- Mar. 31, 2008	7%	7%
Apr. 1, 2008 -- Jun. 30, 2008	6%	6%
Jul. 1, 2008 -- Sep. 30, 2008	5%	5%
Oct. 1, 2008 -- Dec. 31, 2008	6%	6%
Jan. 1, 2009 -- Mar. 31, 2009	5%	5%
Apr. 1, 2009 -- Jun. 30, 2009	4%	4%
Jul. 1, 2009 -- Sep. 30, 2009	4%	4%
Oct. 1, 2009 -- Dec. 31, 2009	4%	4%
Jan. 1, 2010 -- Mar. 31, 2010	4%	4%
Apr. 1, 2010 -- Jun. 30, 2010	4%	4%
Jul. 1, 2010 -- Sep. 30, 2010	4%	4%
Oct. 1, 2010 -- Dec. 31, 2010	4%	4%
Jan. 1, 2011 -- Mar. 31, 2011	3%	3%
Apr. 1, 2011 -- Jun. 30, 2011	4%	4%
Jul. 1, 2011 -- Sep. 30, 2011	4%	4%
Oct. 1, 2011 -- Dec. 31, 2011	3%	3%
Jan. 1, 2012 -- Mar. 31, 2012	3%	3%
Apr. 1, 2012 -- Jun. 30, 2012	3%	3%
Jul. 1, 2012 -- Sep. 30, 2012	3%	3%
Oct. 1, 2012 -- Dec. 31, 2012	3%	3%
Jan. 1, 2013 -- Mar. 31, 2013	3%	3%
Apr. 1, 2013 -- Jun. 30, 2013	3%	3%
Jul. 1, 2013 -- Sep. 30, 2013	3%	3%
Oct. 1, 2013 --Dec. 31, 2013	3%	3%
Jan. 1, 2014 --Mar. 31, 2014	3%	3%
Apr. 1, 2014 --Jun. 30, 2014	3%	3%
Jul. 1, 2014 --Sep. 30, 2014	3%	3%
Oct. 1, 2014 -- Dec. 31, 2014	3%	3%
Jan. 1, 2015 --Mar. 31, 2015	3%	3%
Apr. 1, 2015-- Jun. 30, 2015	3%	3%
Jul. 1, 2015 -- Sept. 30, 2015	3%	3%
Oct. 1, 2015 -- Dec. 31, 2015	3%	3%
Jan. 1, 2016 -- Mar. 31, 2016	3%	3%
Apr. 1, 2016 -- Jun. 30, 2016	4%	4%
Jul. 1, 2016 -- Sep. 30, 2016	4%	4%
Oct. 1, 2016 – Dec. 31, 2016	4%	4%
Jan. 1, 2017 -- Mar. 31, 2017	4%	4%
Apr. 1, 2017 -- Jun. 30, 2017	4%	4%
Jul. 1, 2017 -- Sep. 30, 2017	4%	4%
Oct. 1, 2017 – Dec. 31, 2017	4%	4%
Jan. 1, 2018 -- Mar. 31, 2018	4%	4%
Apr. 1, 2018 -- Jun. 30, 2018	5%	5%
Jul. 1, 2018 -- Sep. 30, 2018	5%	5%
Oct. 1, 2018 – Dec. 31, 2018	5%	5%
Jan. 1, 2019 -- Mar. 31, 2019	6%	6%
Apr. 1, 2019 -- Jun. 30, 2019	6%	6%
Jul. 1, 2019 -- Sep. 30, 2019	5%	5%
Oct. 1, 2019 – Dec. 31, 2019	5%	5%
Jan. 1, 2020 -- Mar. 31, 2020	5%	5%
Apr. 1, 2020 -- Jun. 30, 2020	5%	5%
Jul. 1, 2020 -- Sep. 30, 2020	3%	3%
Oct. 1, 2020 – Dec. 31, 2020	3%	3%
Jan. 1, 2021 -- Mar. 31, 2021	3%	3%
Apr. 1, 2021 -- Jun. 30, 2021	3%	3%
Jul. 1, 2021 -- Sep. 30, 2021	3%	3%
Oct. 1, 2021 – Dec. 31, 2021	3%	3%
Jan. 1, 2022 -- Mar. 31, 2022	3%	3%
Apr. 1, 2022 -- Jun. 30, 2022	4%	4%
Jul. 1, 2022 -- Sep. 30, 2022	5%	5%
Oct. 1, 2022 – Dec. 31, 2022	6%	6%
Jan. 1, 2023 -- Mar. 31, 2023	7%	7%
Apr. 1, 2023 -- Jun. 30, 2023	7%	7%
Jul. 1, 2023 -- Sep. 30, 2023	7%	7%
Oct. 1, 2023 -- Dec. 31, 2024	8%	8%
Jan. 1, 2023 -- Mar. 31, 2024	8%	8%

TABLE OF CORPORATE INTEREST RATES FROM JANUARY 1, 1999 -- PRESENT

	OVER PAYMENTS	UNDER PAYMENTS	LARGE OVER PAYMENTS	LARGE UNDER PAYMENTS
Jan. 1, 1999 -- Mar. 31, 1999	6%	7%	4.50%	9%
Apr. 1, 1999 -- Jun. 30, 1999	7%	8%	5.50%	10%
Jul. 1, 1999 -- Sept. 30, 1999	7%	8%	5.50%	10%
Oct. 1, 1999 -- Dec. 31, 1999	7%	8%	5.50%	10%
Jan. 1, 2000 -- Mar. 31, 2000	7%	8%	5.50%	10%
Apr. 1, 2000 -- Jun. 30, 2000	8%	9%	6.50%	11%
Jul. 1, 2000 -- Sep. 30, 2000	8%	9%	6.50%	11%
Oct. 1, 2000 -- Dec. 31, 2000	8%	9%	6.50%	11%
Jan. 1, 2001 -- Mar. 31, 2001	8%	9%	6.50%	11%
Apr. 1, 2001-- Jun. 30, 2001	7%	8%	5.50%	10%
Jul. 1, 2001 -- Sept. 30, 2001	6%	7%	4.50%	9%
Oct. 1, 2001 -- Dec. 31, 2001	6%	7%	4.50%	9%
Jan. 1, 2002 -- Mar. 31, 2002	5%	6%	3.50%	8%
Apr. 1, 2002-- Jun. 30, 2002	5%	6%	3.50%	8%
Jul. 1, 2002 -- Sep. 30, 2002	5%	6%	3.50%	8%
Oct. 1, 2002 -- Dec. 31, 2002	5%	6%	3.50%	8%
Jan. 1, 2003 -- Mar. 31, 2003	4%	5%	2.50%	7%
Apr. 1, 2003-- Jun. 30, 2003	4%	5%	2.50%	7%
Jul. 1, 2003 -- Sep. 30, 2003	4%	5%	2.50%	7%
Oct. 1, 2003 -- Dec. 31, 2003	3%	4%	1.50%	6%
Jan. 1, 2004 -- Mar. 31, 2004	3%	4%	1.50%	6%
Apr. 1, 2004-- Jun. 30, 2004	4%	5%	2.50%	7%
Jul. 1, 2004 -- Sep. 30, 2004	3%	4%	1.50%	6%
Oct. 1, 2004 -- Dec. 31, 2004	4%	5%	2.50%	7%
Jan. 1, 2005 -- Mar. 31, 2005	4%	5%	2.50%	7%
Apr. 1, 2005 -- Jun. 30, 2005	5%	6%	3.50%	8%
Jul. 1, 2005 -- Sep. 30, 2005	5%	6%	3.50%	8%
Oct. 1, 2005 -- Dec. 31, 2005	6%	7%	4.50%	9%
Jan. 1, 2006 -- Mar. 31, 2006	6%	7%	4.50%	9%
Apr. 1, 2006 -- Jun. 30, 2006	6%	7%	4.50%	9%
Jul. 1, 2006 -- Sep. 30, 2006	7%	8%	5.50%	10%
Oct. 1, 2006 -- Dec. 31, 2006	7%	8%	5.50%	10%
Jan. 1, 2007 -- Mar. 31, 2007	7%	8%	5.50%	10%
Apr. 1, 2007 -- Jun. 30, 2007	7%	8%	5.50%	10%
Jul. 1, 2007 -- Sep. 30, 2007	7%	8%	5.50%	10%
Oct. 1, 2007 -- Dec. 31, 2007	7%	8%	5.50%	10%
Jan. 1, 2008 -- Mar. 31, 2008	6%	7%	4.50%	9%
Apr. 1, 2008 -- Jun. 30, 2008	5%	6%	3.50%	8%
Jul. 1, 2008 -- Sep. 30, 2008	4%	5%	2.50%	7%
Oct. 1, 2008 -- Dec. 31, 2008	5%	6%	3.50%	8%
Jan. 1, 2009 -- Mar. 31, 2009	4%	5%	2.50%	7%
Apr. 1, 2009 -- Jun. 30, 2009	3%	4%	1.50%	6%
Jul. 1, 2009 -- Sep. 30, 2009	3%	4%	1.50%	6%
Oct. 1, 2009 -- Dec. 31, 2009	3%	4%	1.50%	6%
Jan. 1, 2010 -- Mar. 31, 2010	3%	4%	1.50%	6%
Apr. 1, 2010 -- Jun. 30, 2010	3%	4%	1.50%	6%
Jul. 1, 2010 -- Sep. 30, 2010	3%	4%	1.50%	6%
Oct. 1, 2010 -- Dec. 31, 2010	3%	4%	1.50%	6%
Jan. 1, 2011 -- Mar. 31, 2011	2%	3%	.50%	5%
Apr. 1, 2011 -- Jun. 30, 2011	3%	4%	1.50%	6%
Jul. 1, 2011 -- Sep. 30, 2011	3%	4%	1.50%	6%
Oct. 1, 2011 -- Dec. 31, 2011	2%	3%	.50%	5%
Jan. 1, 2012 -- Mar. 31, 2012	2%	3%	.50%	5%
Apr. 1, 2012 -- Jun. 30, 2012	2%	3%	.50%	5%
Jul. 1, 2012 -- Sep. 30, 2012	2%	3%	.50%	5%
Oct. 1, 2012 -- Dec. 31, 2012	2%	3%	.50%	5%
Jan. 1, 2013 -- Mar. 31, 2013	2%	3%	.50%	5%
Apr. 1, 2013 -- Jun. 30, 2013	2%	3%	.50%	5%
Jul. 1, 2013 -- Sep. 30, 2013	2%	3%	.50%	5%
Oct. 1, 2013 -- Dec. 31, 2013	2%	3%	.50%	5%
Jan. 1, 2014 -- Mar. 31, 2014	2%	3%	.50%	5%
Apr. 1, 2014 -- Jun. 30, 2014	2%	3%	.50%	5%
Jul. 1, 2014 -- Sep. 30, 2014	2%	3%	.50%	5%
Oct. 1, 2014 -- Dec. 31, 2014	2%	3%	.50%	5%
Jan. 1, 2015 --Mar. 31, 2015	2%	3%	.50%	5%
Apr. 1, 2015-- Jun. 30, 2015	2%	3%	.50%	5%
Jul. 1, 2015 -- Sept. 30, 2015	2%	3%	.50%	5%
Oct. 1, 2015 -- Dec. 31, 2015	2%	3%	.50%	5%
Jan. 1, 2016 -- Mar. 31, 2016	2%	3%	.50%	5%
Apr. 1, 2016 --Jun. 30, 2016	3%	4%	1.5%	6%
Jul. 1, 2016 -- Sep. 30, 2016	3%	4%	1.5%	6%
Oct. 1, 2016 – Dec. 31, 2016	3%	4%	1.5%	6%
Jan. 1, 2017 -- Mar. 31, 2017	3%	4%	1.5%	6%
Apr. 1, 2017 -- Jun. 30, 2017	3%	4%	1.5%	6%
Jul. 1, 2017 -- Sep. 30, 2017	3%	4%	1.5%	6%
Oct. 1, 2017 – Dec. 31, 2017	3%	4%	1.5%	6%
Jan. 1, 2018 -- Mar. 31, 2018	3%	4%	1.5%	6%
Apr. 1, 2018 -- Jun. 30, 2018	4%	5%	2.5%	7%
Jul. 1, 2018 -- Sep. 30, 2018	4%	5%	2.5%	7%
Oct. 1, 2018 – Dec. 31, 2018	4%	5%	2.5%	7%
Jan. 1, 2019 -- Mar. 31, 2019	5%	6%	3.5%	8%
Apr. 1, 2019 -- Jun. 30, 2019	5%	6%	3.5%	8%
Jul. 1, 2019 -- Sep. 30, 2019	4%	5%	2.5%	7%
Oct. 1, 2019 – Dec. 31, 2019	4%	5%	2.5%	7%
Jan. 1, 2020 -- Mar. 31, 2020	4%	5%	2.5%	7%
Apr. 1, 2020 -- Jun. 30, 2020	4%	5%	2.5%	7%
Jul. 1, 2020 -- Sep. 30, 2020	2%	3%	0.5%	5%
Oct. 1, 2020 – Dec. 31, 2020	2%	3%	0.5%	5%
Jan. 1, 2021 -- Mar. 31, 2021	2%	3%	0.5%	5%
Apr. 1, 2021 -- Jun. 30, 2021	2%	3%	0.5%	5%
Jul. 1, 2021 -- Sep. 30, 2021	2%	3%	0.5%	5%
Oct. 1, 2021 – Dec. 31, 2021	2%	3%	0.5%	5%
Jan. 1, 2022 -- Mar. 31, 2022	3%	2%	0.5%	5%
Apr. 1, 2022 -- Jun. 30, 2022	4%	3%	1.5%	6%
Jul. 1, 2022 -- Sep. 30, 2022	5%	4%	2.5%	7%
Oct. 1, 2022 – Dec. 31, 2022	6%	5%	3.5%	8%
Jan. 1, 2023 -- Mar. 31, 2023	7%	6%	4.5%	9%
Apr. 1, 2023 -- Jun. 30, 2023	7%	6%	4.5%	9%
Jul. 1, 2023 -- Sep. 30, 2023	6%	7%	4.5%	9%
Oct. 1, 2023 -- Dec. 31, 2023	7%	8%	5.5%	10%
Jan. 1, 2024 -- Mar. 31, 2023	7%	8%	5.5%	10%

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