According to the IRS, as of January 1, 2013 the standard mileage rate for tax payers who use a vehicle (including vans, pickup trucks, and panel trucks) for business, medical, charitable, or moving purposes will be:
Tax payers may (or may not) have noticed that the IRS has raised the mileage rate for business miles $0.01 from where it was last year. The IRS has also raised the moving and medical mileage rate up $0.01 per mile as well.
The IRS uses an annual study of fixed costs and variable costs in regards to owning an automobile in order to determine what the standard mileage rate for business miles should be every year. The IRS only uses variable costs in regards to a vehicle in order to determine what the rate for medical and moving mileage should be.
The IRS does give all tax payers the option of actually calculating how much it cost them to use their vehicle during the year instead of using the standard mileage rate. Calculating mileage without the rate just requires excellent bookkeeping (through receipts) on the tax payer's behalf. Most tax payers just opt for using the mileage rates to calculate their deduction because it is a lot easier and a lot less time consuming.
Tax payers can find these requirements as well as all other requirements for using the IRS mileage rate to calculate the deductible of business, medical moving, and charitable expenses in Rev. Proc. 2010-51.
Whether a tax payer chooses to use the standard mileage rates or do the calculations of how much they spent on their own is completely up to them. However, it is always a good idea to keep receipts and records of everything you spend. This is always a good idea in the rare event that you should have to show proof of what you have spent.
Another good idea is to use TurboTax online software to claim your vehicle mileage tax deduction. Their state of the art tax calculatingsoftware will guide you through the entire process. The proper tax forms willed be filled out and you are guaranteed accuracy.