Standard Mileage Rate - The mileage rate paid to persons traveling in privately owned vehicles on official business for the state. This rate is set by statute to automatically update in accordance with the business mileage rate set by the IRS.
| January 1, 2013 - Current | 56.5 cents per mile |
| July 1, 2011 - December 31, 2012 | 55.5 cents per mile |
| January 1, 2011 - June 30, 2011 | 51.0 cents per mile |
| January 1, 2010 - December 31, 2010 | 50.0 cents per mile |
| January 1, 2009 - December 31, 2009 | 55.0 cents per mile |
| July 1, 2008 - December 31, 2008 | 58.5 cents per mile |