CO - Underpayment Interest Rates
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Colorado Underpayment Interest Rates
If payment of tax, or agreement to pay, is made within 30 days of notice of underpayment or nonpayment, then a rate 3% lower than what is shown below applies. This lower rate also applies when a tax underpayment or nonpayment is cured voluntarily without notification from the Department of Revenue
| Year | Qtr 1 1/01 - 3/31 | Qtr 2 4/01 - 6/30 | Qtr 3 7/01 - 9/30 | Qtr 4 10/01 - 12/31 |
|---|---|---|---|---|
| 2010 | 6% | 6% | 6% | 6% |
| 2009 | 8% | 8% | 8% | 8% |
| 2008 | 11% | 11% | 11% | 11% |
| 2007 | 11% | 11% | 11% | 11% |
| 2006 | 9% | 9% | 9% | 9% |
| 2005 | 7% | 7% | 7% | 7% |
| 2004 | 7% | 7% | 7% | 7% |
For more information, see Federal Underpayment Interest Rates, which includes federal rates as well as links to other states.
