Taxes on a private car sale fall almost entirely on the buyer. If you’re buying, your state charges sales tax when you title and register the vehicle, regardless of whether the seller was a dealership or a neighbor. If you’re selling, you usually owe no federal income tax because personal cars lose value over time, and the IRS does not allow you to deduct that loss. The one situation where a seller owes tax is a sale for more than the adjusted cost basis, which mostly comes up with collector or appreciating vehicles.
What the Buyer Pays at Registration
A dealership collects sales tax at the counter. A private seller does not, so the state collects it from you when you apply for a title and registration at your local motor vehicle office. The rate is based on where you live, not where the sale happened. Combined state and local rates range from zero in a handful of states to roughly 10 percent in the highest-tax jurisdictions.
The tax is a one-time payment tied to the ownership transfer. You cannot get plates or complete registration until it is paid. And unlike a dealership deal, you generally cannot reduce the taxable amount by trading in another vehicle. Trade-in credits typically apply only when a licensed dealer handles both sides of the transaction.
How States Calculate the Taxable Amount
The price on the bill of sale is the starting point, but many states cross-check it against fair market value using guides such as Kelley Blue Book or NADA. If the reported price looks far too low for the vehicle, for example a $15,000 car sold for $500, the state can disregard the stated price and tax the transaction at book value.
If you genuinely paid less than book value because of mechanical problems, high mileage, or body damage, you can usually justify the lower figure with documentation like a repair estimate or inspection report. Without that documentation, expect tax at fair market value.
Buying a Car in a Different State
If you buy a car in one state and bring it home, you still owe sales tax, sometimes called use tax, in your home state. Most states credit you for any tax already paid in the state of purchase, so you owe only the difference. Pay 4 percent there, live somewhere that charges 6 percent, and you owe the remaining 2 percent at registration. If your home rate is lower than what you already paid, you generally do not get a refund of the difference.
A few states charge no sales tax at all. Buying there does not eliminate your obligation. Your home state simply collects its full rate when you register. Bring the bill of sale, the signed title, and any receipt showing tax paid so the clerk can figure out what you still owe.
Family Transfers, Gifts, and Inheritance
Many states waive or reduce sales tax when a vehicle passes between close family members. The qualifying relationships vary, but they commonly include spouses, parents, children, grandparents, and grandchildren. Some states include siblings; others do not.
Vehicles given as genuine gifts or received through inheritance often qualify for a full exemption. For a gift exemption, no money or services can change hands. Otherwise the transfer is a sale. Most states require a gift affidavit or equivalent sworn form certifying the transfer was made without payment. Filing a false gift affidavit to avoid sales tax is treated seriously, with penalties that can include substantial fines and, in some states, criminal charges.
Why Most Sellers Owe No Federal Tax
A personal car is a personal-use capital asset. It almost always sells for less than you paid, which means there is no taxable gain. The other side of that rule matters too: the IRS does not let you deduct the loss on personal-use property, so a below-cost sale gives you nothing to write off.1Internal Revenue Service. Topic No. 409, Capital Gains and Losses
A taxable gain only shows up when you sell for more than your adjusted cost basis, meaning the original purchase price plus certain qualifying improvements. That is unusual for everyday vehicles but real for restored classics, rare collector cars, or limited-production models that have appreciated. Buy a classic for $25,000, spend $5,000 on a qualifying restoration, and sell it later for $40,000, and your taxable gain is $10,000, the sale price minus your $30,000 adjusted basis.1Internal Revenue Service. Topic No. 409, Capital Gains and Losses
What Counts as an Improvement to Your Basis
Your basis is not frozen at the original purchase price. The IRS lets you add the cost of work that materially increases the vehicle’s value, restores it, or adapts it to a different use. Adding a new engine or a major performance upgrade, replacing a major structural part or rebuilding the car to like-new condition, and converting the vehicle to a new use such as fitting out a passenger van for cargo work all qualify.2Internal Revenue Service. Tangible Property Regulations – Frequently Asked Questions
Routine maintenance does not count. Oil changes, tire rotations, and brake pad replacements are upkeep, not improvements, and they cannot be added to your basis. Keep receipts for any significant work you have done, because you will need to document that adjusted basis if you ever sell at a profit.
Reporting a Gain and How It Is Taxed
If you sell a personal vehicle for more than your adjusted basis, report the gain on Form 8949 (Sales and Other Dispositions of Capital Assets) and carry the totals to Schedule D of your Form 1040.3Internal Revenue Service. Instructions for Schedule D (Form 1040)
How much tax you pay depends on how long you owned the car. Hold it more than a year and the profit is a long-term capital gain, taxed at 0, 15, or 20 percent depending on your taxable income. Hold it a year or less and the profit is a short-term capital gain, taxed at your ordinary income rate, which is often higher.1Internal Revenue Service. Topic No. 409, Capital Gains and Losses
For the 2026 tax year, the 0 percent long-term rate applies to single filers with taxable income up to $49,450 and joint filers up to $98,900. The 15 percent rate covers most people above those thresholds. The 20 percent rate begins at $545,500 for single filers and $613,700 for joint filers. Most people selling a single vehicle at a modest profit land in the 0 or 15 percent bracket.
Skipping the report is expensive. The IRS accuracy-related penalty is 20 percent of the underpaid tax, plus interest running from the original due date.4Internal Revenue Service. Accuracy-Related Penalty
No Federal EV Credit on Private Sales
If you are hoping the used clean vehicle credit will offset a private electric-car purchase, it will not. The credit expired for vehicles acquired after September 30, 2025. Even while it was active, it required the sale to go through a licensed dealer who reported the transaction to the IRS. Private-party sales never qualified.5Internal Revenue Service. Used Clean Vehicle Credit
As of 2026, no federal tax credit is available for buying a used vehicle through a private sale. Some states run their own rebate or credit programs for used EVs, with their own eligibility rules, so check what your state offers before assuming there is nothing.
Paperwork and Registration Deadlines
Both sides of the sale should record the vehicle identification number (the 17-character code on the dashboard or door jamb), the odometer reading at the time of sale (required by federal law for most vehicles under 20 years old), the agreed sale price, and full legal names and addresses for buyer and seller. The sale price goes on both the title assignment and the bill of sale, and the two numbers need to match.
A signed bill of sale is the primary record of the transaction. Many states publish a standard form on their motor vehicle department website, and some require you to use their official version. For a gift, you will typically need a gift affidavit instead of or in addition to a bill of sale. Fill in every field. Blank sections are one of the most common reasons applications get rejected or delayed.
Every state sets a deadline for titling and registering a vehicle after purchase, and missing it triggers late fees that grow the longer you wait. The windows vary widely, from as few as 10 days in some states to 60 or more in others, so check with your state’s motor vehicle agency as soon as the sale closes. Beyond sales tax, expect a title transfer fee (roughly under $15 to over $150 depending on the state) and a registration fee, which some states charge as a flat rate and others calculate based on the vehicle’s weight, age, or original price.