CRS 24-9-104 states that on and after January 1, 2008, state officers and employees shall be allowed mileage reimbursement of 90% of the prevailing IRS rate per mile for each mile actually and necessarily traveled while on official state business and, when authorized to be utilized and necessary for official state business, 95% of the prevailing IRS rate per mile for four-wheel-drive vehicles (necessary because of road, terrain, or adverse weather conditions) and forty cents per nautical mile for privately owned aircraft. 

The IRS mileage reimbursement rates and the State of Colorado rates are effective January 1, 2013 and are increased from January 1, 2012.

Click Here for mileage rate history.

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