Effective July 1, 2022, the IRS mileage reimbursement rate is $0.625 per mile for the business use of a personal car, van, pickup truck, or panel truck. This is an increase of 4 cents from January of 2022. The mileage reimbursement rate is different for medical or moving purposes for active-duty members of the U.S. Armed Forces. For them, the rate is $0.22 per mile, which is a 4-cent increase from January of 2022. For personal vehicles being driven in the service of charitable organizations, the reimbursement rate is $0.14 per mile. These reimbursement rates are optional for employers to use. They are guidelines that are designed to approximate the fixed and variable costs of using a personal vehicle for business purposes across the country. Because the IRS rate is a national average, though, it may not reflect the costs of using a personal vehicle in California.