Although the national price of gas is a bit lower than it was a year ago, the optional standard mileage rate used to calculate the deductible cost of operating an automobile for business will be going up in 2023. The IRS recently announced that the 2023 cents-per-mile rate for the business use of a car, van, pickup or panel truck is 65.5 cents. These rates apply to electric and hybrid-electric automobiles, as well as gasoline and diesel-powered vehicles.
In 2022, the business cents-per-mile rate for the second half of the year (July 1 – December 31) was 62.5 cents per mile, and for the first half of the year (January 1 – June 30), it was 58.5 cents per mile.
How rate calculations are done
The 3-cent increase from the 2022 midyear rate is somewhat surprising because gas prices are currently lower than they have been. On December 29, 2022, the national average price of a gallon of regular gas was $3.15, compared with $3.52 a month earlier and $3.28 a year earlier, according to AAA Gas Prices. However, the standard mileage rate is calculated based on all the costs involved in driving a vehicle — not just the price of gas.
The business cents-per-mile rate is adjusted annually. It’s based on an annual study commissioned by the IRS about the fixed and variable costs of operating a vehicle, including gas, maintenance, repair and depreciation. Occasionally, if there’s a substantial change in average gas prices, the IRS will change the cents-per-mile rate midyear, as it did in 2022.
Standard rate versus actual expenses
Businesses can generally deduct the actual expenses attributable to business use of vehicles. This includes gas, oil, tires, insurance, repairs, licenses and vehicle registration fees. In addition, you can claim a depreciation allowance for the vehicle. However, in many cases, certain limits apply to depreciation write-offs on vehicles that don’t apply to other types of business assets.