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

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

The rates for the first half of 2011 (January 1 through June 30, 2011) are unchanged: 51¢ per mile for business driving and 19¢ per mile for driving for medical or moving reasons.