The Internal Revenue Service's annual adjustment of the optional standard mileage rate for business use of your vehicle is 3.5 cents per mile more next year. The deductible per-mile rate for medical and moving also goes up. It's 2 cents per mile higher in 2019. The driving deduction rate for charitable travel, however, doesn't change. It never does. It's stuck at 14 cents per mile. That amount is set by Congressional statute and is not affected by the IRS' annual analysis of