Beginning January 1, 2010, the IRS mileage allowance for business miles driven will be $.50 per mile, down from $.55 per mile in 2009. For dealers who offer mileage allowances to their employees, as well as for accounting purposes, please note the change in the rate for 2010. The mileage deduction amounts change every year so be sure to verify what the IRS rate is prior to the beginning of each new year. For more detailed tax information, go to www.irs.gov.