The IRS has increased the standard mileage rates to be used in computing the deductile costs of operating a vehicle for business or when driving for medical or moving reasons. The new rates will apply to vehicle mileage from July 1, 2011 through December 31, 2011.

The revised rates are 55.5 cents per mile for business driving and 23.5 cents for medical and moving driving. The rate for charitable driving is fixed by law and remains at 14 cents per mile.

According to the IRS, mileage rates were raised for the second half of 2011 due to the recent increases in the price of fuel. The rates for the first half of 2011 (January 1 through June 30, 2011) are unchanged; they remain at 51 cents per mile for business driving and 19  cents per mile for medical or moving expenses.