What is the current IRS mileage rate?

For travel January 1, 2023 - June 30, 2023, the IRS has increased the mileage rate to $0.655/mi as noted here on their website.

The mileage rates include the variable costs of operating a vehicle, such as the cost of gas, oil, tires, maintenance and repairs, as well as the fixed costs of operating the vehicle, such as insurance, registration, and depreciation or lease payments. The mileage rates do not include the cost of parking and tolls.