Per IRS Notice 2018-03, the IRS announced the 2018 auto mileage rates. Effective January 1, 2018, the auto rates per mile:
Business – $0.545
Medical and moving – $0.18
Charitable – $0.14
You also have the option of calculating the actual costs of using your vehicle rather than using the standard mileage rates.
Notice 2018-03 contains the standard mileage rates, the amount a taxpayer must use in calculating reductions to basis for depreciation taken under the business standard mileage rate, and the maximum standard automobile cost that a taxpayer may use in computing the allowance under a fixed and variable rate plan.
The 2019 auto mileage rates will be announced in December 2018.