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IRS Penalty & Interest Rates

IRS interest rates will remain unchanged for the calendar quarter beginning April 1, 2021. The rates will be:

3% for overpayments (2% in the case of a corporation);
0.5% for the portion of a corporate overpayment exceeding $10,000;
3% for underpayments; and
5% for large corporate underpayments.

For taxpayers other than corporations, the overpayment and underpayment rate is the federal short-term rate plus 3 percentage points. This rate is determined by the IRS on a quarterly basis.

Year	Qtr 1 1/1 - 3/31	Qtr 2 4/1 - 6/30	Qtr 3 7/1 - 9/30	Qtr 4 10/1 - 12/31
2021	3%	3%
2020	5%	5%	3%	3%
2019	6%	6%	5%	5%
2018	4%	5%	5%	5%
2017	4%	4%	4%	4%
2016	3%	4%	4%	4%
2015	3%	3%	3%	3%
2014	3%	3%	3%	3%
2013	3%	3%	3%	3%
2012	3%	3%	3%	3%
2011	3%	4%	4%	3%
2010	4%	4%	4%	4%
2009	5%	4%	4%	4%
2008	7%	6%	5%	6%
2007	8%	8%	8%	8%
2006	7%	7%	8%	8%
2005	5%	6%	6%	7%
2004	4%	5%	4%	5%
2003	5%	5%	5%	4%
2002	6%	6%	6%	6%
2001	9%	8%	7%	7%
2000	8%	9%	9%	9%

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