According to the search results, the IRS mileage rate for 2022 varies depending on the purpose of the travel and the time of the year. The standard mileage rate for the use of a car for business purposes was 58.5 cents per mile for all miles of business use from January 1, 2022, to June 30, 2022. However, due to soaring gas prices, the IRS announced a rare midyear increase in the standard mileage rate for the final six months of 2022 to 62.5 cents per mile for employees who use their own vehicles for business purposes from July 1, 2022, to December 31, 2022. The standard mileage rate for medical and moving expenses was 18 cents per mile, and the rate for charitable purposes was 14 cents per mile for the entire year.