IRS Vehicle Trade-In Rules: Gain, Recapture, and Depreciation Caps

The IRS vehicle trade-in rules split cleanly along one line: whether the vehicle was personal or used in a business. Trading in a personal car almost never touches your federal return, because losses on personal property are not deductible and cars rarely appreciate. A business vehicle trade-in is a different transaction entirely. Since 2018, the IRS treats it as a sale of the old vehicle plus a separate purchase of the new one, which can trigger depreciation recapture taxed as ordinary income, or occasionally a deductible loss.

Personal Vehicle Trade-Ins

A car used only for personal transportation is a capital asset. Trade it in and the IRS treats the transaction like any sale of personal property: a loss is not deductible, and a gain is taxable.¹ Since cars almost always lose value, most personal trade-ins produce no tax consequence at all.

The basis of the replacement vehicle is its full purchase price, not just the cash you handed over. Buy a $60,000 vehicle with a $20,000 trade-in credit and your basis is $60,000: you paid with $40,000 cash and $20,000 in property, and both count.¹ The trade-in allowance is just how the dealer structured the payment.

No special form is required. The only time a personal trade-in shows up on your return is if the allowance exceeds what you originally paid for the old car, producing a capital gain. That is rare outside of collectible or classic cars.

Business Vehicle Trade-Ins Are Now Two Transactions

Before 2018, swapping one business vehicle for another could qualify as a like-kind exchange under Section 1031, deferring any gain. The Tax Cuts and Jobs Act ended that treatment for everything except real estate. Vehicles, equipment, and all other tangible personal property lost like-kind eligibility as of January 1, 2018.²

Now the IRS sees two events at once: you sold the old vehicle, and you bought a new one. Any gain or loss on the sale hits your return in the year of the trade. The rule applies to any vehicle used more than 50% for business.³

Report the sale of the old vehicle on Form 4797, Sales of Business Property. The form walks through the gain-or-loss calculation and routes the result to the correct line on your income tax return.⁴ You will need the original purchase price, a running total of every depreciation deduction you claimed, and a mileage log that supports your business-use percentage.

Calculating Gain or Loss on the Old Business Vehicle

Start with adjusted basis: the original cost minus all depreciation you claimed. Pay $50,000 for a truck, deduct $40,000 in depreciation over the years, and your adjusted basis is $10,000. Your gain or loss equals the trade-in allowance minus that adjusted basis. A $15,000 allowance on the same truck is a $5,000 gain. An $8,000 allowance is a $2,000 deductible loss.

Depreciation Recapture

Gains on business vehicles are not all taxed the same way. Any gain is treated as ordinary income up to the amount of depreciation you previously deducted. This is Section 1245 recapture, and it stops taxpayers from writing off a vehicle at ordinary rates and then paying capital-gains rates on the sale.⁵

In the truck example, the $5,000 gain sits well within the $40,000 of prior depreciation, so all of it is ordinary income at your regular rate. Recapture catches most business vehicle trade-ins because vehicles rarely sell for more than their original cost.

If a trade-in allowance ever exceeds the original cost of the vehicle, the gain above total depreciation is a Section 1231 gain, which can qualify for long-term capital gains rates when your Section 1231 gains for the year exceed your losses.⁶ This is uncommon with vehicles.

Basis and Depreciation of the New Business Vehicle

Because the trade-in is a separate sale, the basis of the new vehicle is simply its full purchase price: cash, financing, sales tax, and title fees you capitalize into the cost. The trade-in allowance does not reduce it.⁷

Compared to the old like-kind rules, this actually helps. Under the prior system, the old vehicle’s low adjusted basis carried into the new one, shrinking future depreciation. Today, a $55,000 truck gives you $55,000 of depreciable basis no matter what happened with the trade.

Luxury Auto Depreciation Caps for 2026

Passenger automobiles weighing 6,000 pounds or less are subject to annual depreciation caps. These limits apply even to modestly priced cars despite the “luxury auto” label. For vehicles placed in service in 2026 where bonus depreciation applies, the caps are:⁸

First year: $20,300
Second year: $19,800
Third year: $11,900
Each year after: $7,160

Elect out of bonus depreciation and the first-year cap drops to $12,300. Years two through four are unchanged.⁸ Report the deduction on Form 4562, Depreciation and Amortization, which is required for any vehicle or other listed property.⁹

100% Bonus Depreciation Is Back

The One Big Beautiful Bill, signed in 2025, permanently restored 100% bonus depreciation for qualified property acquired after January 19, 2025.¹⁰ For business vehicles placed in service in 2026, that means the full depreciable basis of a qualifying vehicle can be deducted in year one, subject to the luxury auto caps for lighter passenger cars.

One timing wrinkle: a vehicle acquired after September 27, 2017, but before January 20, 2025, and placed in service in 2026, gets only 20% bonus, not 100%.⁸ For vehicles both acquired and placed in service after January 19, 2025, the full 100% rate applies.

Heavy Vehicles Over 6,000 Pounds

Vehicles with a gross vehicle weight rating above 6,000 pounds escape the passenger auto caps. The exception covers many full-size pickups, large SUVs, and cargo vans.¹¹ GVWR is the manufacturer’s rating, not curb weight, so some midsize SUVs qualify.

Heavy SUVs between 6,001 and 14,000 pounds GVWR can claim a Section 179 deduction up to $32,000 for 2026. Any remaining cost is eligible for bonus depreciation, so most of the vehicle’s price can be written off in the first year. Trucks and vans in the same weight range that are not built on a passenger automobile chassis face no Section 179 dollar cap beyond the overall annual limit.

The math can favor heavy-vehicle buyers. Trading in a heavy pickup, paying recapture tax on the gain, and placing a new heavy vehicle in service in the same year can produce first-year deductions that more than offset the recapture. The two-transaction treatment is not purely a disadvantage.

Vehicles Used for Both Business and Personal Driving

If you use the same car for work and personal errands, only the business-use percentage counts. Divide business miles by total miles for the year.¹²

The 50% threshold is a hard line. Business use must exceed 50% to claim MACRS depreciation or a Section 179 deduction at all.³ If business use drops to 50% or below in a later year, you lose MACRS eligibility, switch to straight-line, and may need to recapture excess depreciation from earlier years on Form 4797.⁴

When a mixed-use vehicle is traded in, only the business portion runs through the gain-or-loss calculation. The personal portion follows the personal vehicle rules: no deductible loss, and any gain is capital gain. Splitting the transaction that way takes good mileage records going back to the year you placed the vehicle in service.

Clean Vehicle Credits No Longer Apply

If the new vehicle is electric or a plug-in hybrid, the federal clean vehicle tax credits have been eliminated for vehicles acquired after September 30, 2025. This covers the new clean vehicle credit, the previously-owned clean vehicle credit, and the qualified commercial clean vehicle credit.¹³ The only exception is a vehicle acquired on or before that date but placed in service later. The trade-in allowance itself was never tied to these credits, but their loss changes the overall math of switching to an EV.

State Sales Tax Savings Are Separate

A majority of states reduce the sales tax on a new vehicle by the value of your trade-in. Buy a $50,000 car, trade in one worth $15,000, and you pay sales tax on $35,000. This benefit is separate from every federal rule above. A handful of states offer no reduction, and at least one caps the credit, so check your state’s rules before assuming the full trade-in value will come off the taxable purchase price. The savings apply whether the vehicle is personal or business.

1
Internal Revenue Service. Topic No. 409, Capital Gains and Losses
2
Internal Revenue Service. Like-Kind Exchanges – Real Estate Tax Tips
3
Internal Revenue Service. Publication 463 (2025), Travel, Gift, and Car Expenses
4
Internal Revenue Service. Instructions for Form 4797 (2025)
5
Internal Revenue Service. Publication 544 (2025), Sales and Other Dispositions of Assets – Section: Depreciation Recapture
6
Office of the Law Revision Counsel. 26 USC 1231 – Property Used in the Trade or Business and Involuntary Conversions
7
Internal Revenue Service. Publication 544 (2025), Sales and Other Dispositions of Assets
8
Internal Revenue Service. Rev. Proc. 2026-15 – Depreciation Limitations for Passenger Automobiles Placed in Service During Calendar Year 2026
9
Internal Revenue Service. Instructions for Form 4562 (2025)
10
Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One Big Beautiful Bill
11
Internal Revenue Service. 2025 Instructions for Form 4562
12
Internal Revenue Service. Topic No. 510, Business Use of Car
13
Internal Revenue Service. Clean Vehicle Tax Credits