You can move from the standard mileage rate to actual vehicle expenses, but only if you set things up correctly in the vehicle’s first year and haven’t since made a depreciation election that closes the door. Switching from mileage to actual expenses is allowed year to year on an owned vehicle when you chose the standard mileage rate the first year the car was available for business use.1Internal Revenue Service. Topic No. 510, Business Use of Car Miss that first-year step, lease the vehicle, or claim accelerated depreciation along the way, and the switch may not be available.
The First-Year Rule Controls Everything
For an owned vehicle, the decision that governs your future flexibility happens the first year you use the car for business. Choose the standard mileage rate that year and you can switch between methods in any later year, picking whichever produces the larger deduction.1Internal Revenue Service. Topic No. 510, Business Use of Car Claim actual expenses instead in year one and you are generally locked out of the standard mileage rate for that vehicle for the rest of the time you own it.
The clock starts when the car is first available for business use, not when you bought it.1Internal Revenue Service. Topic No. 510, Business Use of Car If you drove a personal car for a few years and then converted it to business use, the conversion year is your first year for this purpose. Choosing the mileage rate that year keeps both methods on the table going forward.
Leased Vehicles Cannot Switch Mid-Lease
Leased cars follow a stricter rule. If you use the standard mileage rate for a leased vehicle, you must keep using it for the entire lease period, including any renewals.2Internal Revenue Service. Publication 463, Travel, Gift, and Car Expenses There is no year-to-year toggling.
The rule runs the other direction too. To use the standard mileage rate on a leased vehicle, you cannot have claimed actual expenses on that lease after 1997.1Internal Revenue Service. Topic No. 510, Business Use of Car Whichever method you pick in the first year of a lease is the method you use for the life of that lease, so the comparison is worth running before you sign.
Depreciation Elections That Lock You In
Even when you cleared the first-year hurdle by choosing the mileage rate, certain depreciation choices in a later actual-expense year permanently cut off your ability to return to the mileage rate on that vehicle.
MACRS and Section 179
Depreciating the vehicle under the Modified Accelerated Cost Recovery System (MACRS) front-loads the deduction into the early years. Once you elect MACRS under 26 U.S.C. ยง 168, the choice is irrevocable for the vehicle’s entire recovery period.3Office of the Law Revision Counsel. 26 USC 168 – Accelerated Cost Recovery System The same holds for Section 179 expensing, which lets you deduct a large portion of the vehicle’s cost in one year. Either election bars a return to the standard mileage rate for that car.
Section 179 allows businesses to deduct up to $32,000 in the first year for certain SUVs over 6,000 pounds gross vehicle weight, with heavier work trucks and vans potentially qualifying for the full Section 179 deduction. Passenger cars face the lower annual depreciation caps under Section 280F.
Bonus Depreciation
Bonus depreciation creates the same lock-in. Under the TCJA phase-down, the rate is 40 percent for property placed in service in 2025, drops to 20 percent for 2026, and expires after 2026 for most property.3Office of the Law Revision Counsel. 26 USC 168 – Accelerated Cost Recovery System Even a partial bonus depreciation claim is an accelerated method, and taking any of it prevents a switch back to the mileage rate.
Straight-Line Keeps the Door Open
To preserve the option of switching back to the mileage rate later, use straight-line depreciation over the vehicle’s recovery period in any year you claim actual expenses. Straight-line spreads the cost evenly and avoids the lock-in that accelerated methods create. It is the only depreciation approach under actual expenses that keeps both methods available.
What the Switch Costs You
Moving to actual expenses does not reset the vehicle’s tax basis. Every year you claimed the standard mileage rate, a portion of that rate counted as depreciation and reduced your basis. For 2026, the depreciation component is 35 cents of the 72.5-cent rate.4Internal Revenue Service. 2026 Standard Mileage Rates Drive 15,000 business miles at the mileage rate and your basis drops by $5,250 for that year alone, even though you never wrote a separate depreciation deduction on your return.
That accumulated depreciation follows the car. When you switch to actual expenses, or eventually sell, the built-in basis reduction can trigger depreciation recapture as ordinary income on the sale.2Internal Revenue Service. Publication 463, Travel, Gift, and Car Expenses Keep a running total of your business miles by year so you can compute the basis adjustment when you need it.
Depreciation After the Switch
If you used the mileage rate first and then switch to actual expenses, you cannot use MACRS for the remaining depreciation. You must use straight-line depreciation over the vehicle’s estimated remaining useful life.5Internal Revenue Service. Rev. Proc. 98-63 The Section 280F annual caps still apply, so even the straight-line amount is limited each year. The depreciation deduction you pick up under actual expenses after years on the mileage rate may be smaller than it first appears, and that shrinks the payoff of switching.
Running the Comparison for 2026
The 2026 standard mileage rate for business use is 72.5 cents per mile, with 35 cents of that treated as depreciation.4Internal Revenue Service. 2026 Standard Mileage Rates To see whether switching helps this year, add up your operating costs for the vehicle and multiply by your business-use percentage. Compare that number to 72.5 cents times your business miles.
Business-use percentage is total business miles divided by total miles driven for all purposes. If you drove 20,000 miles total and 12,000 for business, you deduct 60 percent of each qualifying cost. Qualifying actual expenses include:2Internal Revenue Service. Publication 463, Travel, Gift, and Car Expenses
- Gas, oil, repairs, and tires
- Insurance premiums, registration fees, and license fees
- Depreciation (owned vehicles) or lease payments (leased vehicles)
- Garage rent, tolls, and parking fees tied to business use
When your per-mile operating cost exceeds the standard rate, actual expenses usually win. That pattern is most common with older cars that need frequent repairs and with vehicles driven relatively few business miles.
Reporting the Switch
Sole proprietors and single-member LLCs report vehicle expenses on Schedule C (Form 1040).6Internal Revenue Service. About Schedule C (Form 1040), Profit or Loss From Business (Sole Proprietorship) Part IV asks which method you are using along with basic vehicle information. If you claim depreciation under actual expenses, you also file Form 4562.7Internal Revenue Service. About Form 4562, Depreciation and Amortization (Including Information on Listed Property)
Keep receipts, mileage logs, and expense worksheets for at least three years after filing the return that claims the deduction.8Internal Revenue Service. How Long Should I Keep Records? In a switch year, keep the records supporting both calculations. If the IRS reviews the return, it may want to see the comparison and confirm you applied the correct rules.