Effective July 1, 2013, the IFTA Articles of Agreement require that the annual interest rate for IFTA be set 2 percentage points above the IRS underpayment rate. The adjustment will occur on January 1 of each year. IFTA interest accrues monthly at the rate of 1/12 of the annual rate. See the tables below for the applicable rates.
Period | IRS Underpayment Rate | IFTA Annual Interest Rate |
|---|
| 01/01/2019 - 12/31/2019 | 5% | 7% |
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| 01/01/2018 - 12/31/2018 | 4% | 6% |
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| 01/01/2017 - 12/31/2017 | 4% | 6% |
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| 01/01/2016 - 12/31/2016 | 3% | 5% |
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| 01/01/2015 - 12/31/2015 | 3% | 5% |
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| 01/01/2014 - 12/31/2014 | 3% | 5% |
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| 07/01/2013 - 12/31/2013 | 3% | 5% |
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