Mileage Deduction 2020 Posted on January 10, 2020 (November 16, 2022) by LONYOUNG The 2020 standard mileage rate for business driving falls to 57.5¢ a mile. The mileage allowance for medical travel and military moves declines to 17¢ a mile in 2020. But the charitable driving rate stays put at 14¢ a mile. It’s fixed by law.