Skip to main content

Interest Rates

Interest is due on delinquent business tax and is also payable on business tax refunds. Additional interest accrues with each month in delinquency. The interest rate is re-calculated annually to reflect the average Federal short-term rate plus 3 percentage points. 

Tax YearMonthly Interest Rate
20240.7%
20230.5%
20220.3%
20210.5%
20200.5%
20190.5%
20180.4%
20170.3%
20160.3%
20150.3%
20140.3%
20130.3%
20120.3%
20110.3%
20100.4%
20090.5%
20080.7%
20070.7%
20060.6%
20050.5%
20040.4%
20030.5%
20020.6%

For 2001 and prior years, interest accrued at a rate of 1.25% per month.