Standard Mileage Rate
If you use your car for business purposes, you may deduct a standard mileage rate for unreimbursed mileage. The 2013 standard mileage rate is 56.5 cents per mile. Make sure to keep a written record of your total mileage and business mileage.
In addition to business mileage, other types of mileage are deductible if you can itemize. If you are involved in charity or volunteer work for a a qualified nonprofit organization, you can deduct your mileage at 14 cents per mile. The mileage for medical espenses may be deductable for doctor, dentist, and others at 24 cents per mile.