Colorado Revised Statutes Title 44. Activities Regulated by the Department of Revenue § 44-30-604. Returns and reports--failure to file--penalties

(1)(a) Any person who fails to file a return or report required by this article 30, which return or report includes taxable transactions, on or before the date the return or report is due as prescribed in section 44-30-602 is subject to the payment of an additional amount assessed as a penalty equal to fifteen percent of the tax or ten dollars, whichever is greater; except that, for good cause shown, the executive director may reduce or eliminate the penalty.

(b) Any person subject to taxation under this article 30 who fails to pay the tax within the time prescribed is subject to an interest charge of two percent per month or portion thereof for the period of time during which the payment is late or five dollars, whichever is greater.

(d) The executive director may, upon application of the taxpayer, establish a maximum interest rate of twenty-four percent upon delinquent taxes if the executive director determines that the delinquent payment was caused by a mistake of law and was not caused by an intent to evade the tax.