In their newest press release the IRS announced the standard mileage rates  for 2010. These rates are used to calculate the deductible costs of  operating an automobile for business, charitable, medical or moving  purposes.
Beginning on Jan. 1, 2010, the standard  mileage rates for the use of a car (also vans, pickups or panel trucks)  will be:
50 cents per mile for business miles driven
16.5 cents per mile driven for medical or moving purposes
14 cents per mile driven in service of  charitable organizations
The new rates for business, medical and  moving purposes are slightly lower than last year’s. The mileage rates  for 2010 reflect generally lower transportation costs compared to a  year ago.
The standard mileage rate for business  is based on an annual study of the fixed and variable costs of operating  an automobile. The rate for medical and moving purposes is based on  the variable costs as determined by the same study. Independent contractor  Runzheimer International conducted the study.
A taxpayer may not use the business standard  mileage rate for a vehicle after using any depreciation method under  the Modified Accelerated Cost Recovery System (MACRS) or after claiming  a Section 179 deduction for that vehicle. In addition, the business  standard mileage rate cannot be used for any vehicle used for hire or  for more than four vehicles used simultaneously.
Taxpayers always have the option of calculating  the actual costs of using their vehicle rather than using the standard  mileage rates.
Revenue Procedure 2009-54 contains additional  details regarding the standard mileage rates.
