Selling Your Car After Claiming the Standard Mileage Deduction

Drivers remember Line 9. They forget the car is also an asset. Every year you used the standard mileage rate, the IRS treated a slice of those cents as wear and tear. You never put that slice on Form 4562. It still reduces basis. When you sell, trade in, or otherwise dispose of the car, gain or loss is measured against that adjusted number — not what you paid in 2023 and not what the dealer says the car is “worth.”

Step 1: Write down original basis

Basis starts as what the car cost you, not the sticker and not today’s private-party listing.

• Include: purchase price, sales tax you paid, title/registration that is a capital cost if you capitalized it, and later improvements (engine, transmission) that added to the car rather than repaired it.
• Do not treat as basis: routine repairs, oil changes, tires you already deducted as actual expenses in a different year, or the loan balance. A loan is how you paid; it is not extra basis.
• Trade-in when you bought this car: the contract may show a net price after the old car. Your preparer needs the full allocation, not just the monthly payment.

If you converted a personal car to business use, basis for depreciation is generally the lesser of fair market value on the conversion date or your adjusted basis at that date. That is a common gig-driver fact pattern (you already owned the Civic, then you started Uber). Do not invent FMV from memory if you can find a dated listing or a contemporaneous note.

Step 2: Total business miles for every year you used the standard rate

The depreciation component applies to business miles you claimed under the standard rate, year by year. A career total of “about 80,000 miles” is not enough, because 2024’s cents are not 2026’s cents.

Pull the same contemporaneous log you needed for Schedule C: date, destination, purpose, miles, plus total miles on the car. That is the habit in how to keep an IRS-ready mileage log and how to track mileage for taxes. Personal and commuting miles do not generate this basis reduction. They still matter for business-use percentage if you ever used actual expenses or if the sale is mixed-use (Step 5).

If a year’s log is thin, you have the same reconstruction problem as an amendment: platform history and odometer brackets can support a conservative number; a round guess cannot. See amending a missed mileage deduction if the weak year is also a year you might still fix.

Step 3: Multiply each year by that year’s depreciation component

IRS Notice 2026-10 (section 4) lists the portion of the business standard mileage rate treated as depreciation. Recent years:

Year you drove	Depreciation component
2022	26¢ per business mile
2023	28¢
2024	30¢
2025	33¢
2026	35¢ (full year)

Two 2026 details people mix up:

• The deduction on Schedule C uses 72.5¢ through June 30 and 76¢ from July 1. That is income-tax math for this year’s Line 9.
• The basis reduction uses 35¢ on every 2026 business mile you took under the standard rate. The mid-year announcement that raised the business rate did not publish a second depreciation component.

Older years have their own published cents. Look them up; do not back-solve from this year’s table. Publication 463 is the narrative; the annual mileage notice is the number.

Step 4: Reduce basis, but not below zero

Adjusted basis ≈ original basis − (year 1 miles × year 1 component) − (year 2 miles × year 2 component) − …

Stop at zero. Publication 463 is explicit that you reduce basis by the depreciation in the standard rate but not below zero. If basis hits zero and you keep driving for business, you still take the full standard mileage rate. You just have no more basis left to shave when you sell.

Illustration only — not your return and not a promised tax bill:

	Example figures
Bought used car (basis)	$18,000 in 2024
2024 business miles × 30¢	10,000 × $0.30 = $3,000
2025 business miles × 33¢	12,000 × $0.33 = $3,960
2026 business miles × 35¢	9,000 × $0.35 = $3,150
Total treated as depreciation	$10,110
Adjusted basis at sale	$18,000 − $10,110 = $7,890

If that car then sold for $9,500 cash, the unallocated difference is $1,610. Whether all of that is business gain, how much is recapture, and what a trade-in does to amount realized is Step 5. The point of the table is the habit: miles × that year’s cents, every year, on one sheet.

Step 5: Compare amount realized to adjusted basis

Amount realized is generally cash plus the fair market value of other property you received, including a trade-in allowance, minus selling expenses (not the remaining loan by itself). If the buyer pays off your loan as part of the deal, that relief is usually part of the amount realized. Dealer paperwork is evidence; it is not the tax formula.

Gain or loss = amount realized − adjusted basis. Then the character of the gain matters:

• Vehicles used in a trade or business are typically section 1245 property. Gain up to depreciation allowed or allowable — including the standard-rate component you just added up — is generally ordinary income (recapture).
• Gain above that amount can be section 1231 gain (which may be taxed more like long-term capital gain if you held the car more than a year, subject to 1231 netting).
• A business loss can be deductible; a personal loss on a car you also grocery-shopped in usually is not.

If the car was mixed-use, Publication 463 treats the sale as two properties: a business part and a personal part. You allocate basis, amount realized, and the depreciation you took. That allocation is why Part IV mileage splits and odometer totals still matter in the year you sell. Do not assume “I drove for DoorDash so the whole gain is Schedule C.” And do not drop a sale onto Line 9. The usual form is Form 4797 (Sales of Business Property), flowing to Form 1040, not a negative car expense on Schedule C.

Leased cars you never owned are a different story: you are not selling basis you depreciated through the standard rate. A lease buyout that you then use in the business starts a new basis. Have someone look at the contract.

Step 6: Note any actual-expense switch before you sell

The first-year election in standard vs. actual is still in force when you dispose of the car:

• If you used the standard rate in the first business year, then switched to actual expenses, the basis you started depreciating under actual is already reduced by the standard-rate components from the earlier years. Later depreciation is supposed to be straight-line. Do not also subtract those same miles a second time at sale, and do not pretend you never took the standard rate.
• If you started with actual expenses and accelerated depreciation, you generally could not use the standard rate on that car later. Sale math uses the depreciation you actually claimed (and were allowed) on Form 4562, luxury-auto limits included.
• A new car is a new first-year election. Selling this one does not change how you should have treated it; it resets the choice on the replacement.

This section is the “high-level” warning, not a complete MACRS walkthrough. If you ever took section 179 or bonus depreciation, recapture rules get stricter, especially if business use later dropped to 50% or below. That is CPA territory.

Step 7: Keep the worksheet and the logs with the sale papers

The file you want in one folder, digital or paper:

• Purchase contract, title, and proof of improvements
• Each year’s mileage log (or export) with business miles circled
• A one-page basis worksheet: year, business miles, IRS component, dollars subtracted, running basis
• Year-start / year-end odometer evidence so totals are believable
• Bill of sale, dealer recap, or trade-in rider showing cash, payoff, and allowance
• The filed Schedule C years that claimed the standard rate (so “allowed or allowable” is not a mystery)

Keep that packet with the return for the year of sale. You generally do not attach the worksheet unless the IRS or your preparer asks. If you replace the car and keep driving, start the new log the day the replacement is in service — including 2026’s two deduction rates if that day is this year.

Frequently Asked Questions

Does the standard mileage rate reduce my car’s basis?

Yes. The IRS publishes a cents-per-mile depreciation component each year. Times business miles. Subtract from basis, not below zero.

What is the 2026 depreciation component?

35¢ per business mile for the whole year, per Notice 2026-10. The 72.5¢ / 76¢ split is a separate Schedule C calculation.

Do I owe tax if I sell for more than adjusted basis?

You might. Recapture and mixed-use allocation decide how much and on which form (often Form 4797). A payoff quote is not the tax result.

If I switch from standard mileage to actual expenses, what basis do I use?

Original basis minus the standard-rate depreciation already treated as taken. Then straight-line on what is left. Do not double-count those miles at sale.

Related reading: claiming car expenses on Schedule C, standard mileage vs. actual expenses, IRS-ready mileage log, 2026 two-rate year, other self-employed deductions, and TaxMiles on the web.

This article is general tax education for U.S. federal returns, not legal, tax, or accounting advice and not a prediction of gain, loss, or recapture on any sale. Basis, section 1245, section 1231, Form 4797, luxury-auto limits, and like-kind exchange rules (generally unavailable for personal property after 2017) are fact-specific. Figures for the depreciation component are taken from IRS Notice 2026-10; the 2026 business rates are 72.5¢ through June 30 and 76¢ from July 1. Read Publication 463 and the current form instructions or work with a licensed professional. TaxMiles: Mileage Tracker is published by Gigabyte LLC (App Store id 6758579463) and is not affiliated with the IRS. It is not MileIQ, not Everlance, and not Mileage Tracker for Taxes (id 6758426140).