A vehicle bill of sale is the written record of a private car sale: it identifies the buyer and seller, describes the vehicle, states the price, and fixes the date ownership changed hands. The buyer needs it to register the car and prove ownership; the seller needs it to prove they no longer own the vehicle. Every state motor vehicle agency expects some version of this document when a title is transferred, and the details on it drive how much sales tax the buyer pays. Most states publish an official template on their motor vehicle agency website, and using that template is safer than drafting from scratch because it already contains the fields clerks look for and the “as-is” language that limits seller liability.
What the Document Must Contain
Start with the full legal names and current addresses of both parties, written exactly as they appear on each person’s government-issued ID. Nicknames and misspellings that don’t match the title or driver’s license are among the most common reasons clerks reject paperwork at the counter.
Describe the vehicle in enough detail to tell it apart from every other car on the road: year, make, model, and body style as shown on the current title. The seventeen-digit Vehicle Identification Number is the single most important entry. That number ties the vehicle to its history and is how agencies track title brands like “salvage” or “flood.”
Write the exact purchase price and the date of the sale. The price drives sales tax; the date establishes when legal responsibility shifted. If the vehicle is a gift, enter $0 and write “gift” rather than leaving the price blank. Note the payment method on the document as well. That notation becomes important evidence if either party later disputes whether payment was made.
Odometer Disclosure
Federal law requires the seller to provide a written odometer disclosure every time a covered vehicle changes hands. The disclosure must state the cumulative mileage on the odometer and whether that reading reflects actual mileage or whether the true mileage is unknown.1Office of the Law Revision Counsel. 49 USC 32705 – Disclosure Requirements on Transfer of Motor Vehicles The reading must exclude tenths of a mile.2eCFR. 49 CFR Part 580 – Odometer Disclosure Requirements
The requirement applies to most vehicles less than twenty model years old. For transfers happening in 2026, vehicles with a 2006 or earlier model year are exempt.2eCFR. 49 CFR Part 580 – Odometer Disclosure Requirements The exemption does not apply to heavy vehicles over 16,000 pounds gross weight, which have separate rules.
Penalties are steep. A violation of the disclosure rules carries a civil penalty of up to $10,000 per vehicle, capped at $1,000,000 for a related series of violations. Knowingly and willfully tampering with an odometer or falsifying the disclosure carries criminal penalties of up to three years in prison.3Office of the Law Revision Counsel. 49 USC 32709 – Penalties A buyer who was defrauded can sue for three times the actual damages or $10,000, whichever is greater.4Office of the Law Revision Counsel. 49 USC 32710 – Civil Actions by Private Persons
Verify the Title and VIN Before You Sign
A bill of sale is not proof of ownership on its own. Without a clean title, the buyer may not be able to register, insure, or lawfully drive the car. If a seller says the title is lost or “on its way,” wait until they produce a duplicate from their state motor vehicle agency.
Before any money moves, check the vehicle’s history through the National Motor Vehicle Title Information System, run by the U.S. Department of Justice. A NMVTIS report shows title brand history (salvage, flood, junk), the latest reported odometer reading, and whether the vehicle was ever declared a total loss. The system covers roughly 87 percent of the U.S. vehicle population, so a clean result isn’t a guarantee, but a flagged result is a clear warning.5National Motor Vehicle Title Information System. For Consumers The National Insurance Crime Bureau’s free VINCheck tool adds a cross-reference against theft and salvage records from participating insurers, though it only queries insurance records. Compare the VIN on the dashboard plate and the driver’s door jamb sticker against the number printed on the title. If they don’t match, something is wrong.
If the vehicle has an outstanding loan, the lender holds a lien on the title and won’t release it until the balance is paid. The safest way to handle this is to complete the transaction at the lender’s office so the payoff, lien release, and title transfer happen together. If that isn’t possible, verify the lien status independently before you pay.
Signing and Notarization
Both parties sign using the name exactly as it appears on their ID. A signature that doesn’t match the name on the title is a common reason a clerk refuses to process the transfer.
Some states require a notary public to witness the signatures, particularly for gifts or sales recorded well below fair market value. A notary verifies each person’s identity and confirms they’re signing voluntarily. Fees vary; most states cap a standard acknowledgment somewhere between a few dollars and $15, though some set no maximum.
Even where notarization isn’t required, it’s worth considering for any transaction likely to draw scrutiny. A notarized document carries more weight at the motor vehicle office and in court because it independently verifies that both parties appeared and showed identification on the date in question.
Gifts and Below-Market Sales
When a car is gifted or sold for far less than market value, extra documentation protects both parties. Many states waive or reduce sales tax on gifts between close family (spouses, parents and children, grandparents and grandchildren), but the buyer usually has to file a gift affidavit or declaration at registration. The bill of sale should state “gift” and identify the relationship.
Selling a car to a friend for a dollar doesn’t fool the tax office. Many states compare the reported price against standard valuation guides, and if the number looks unreasonable they may assess sales tax on fair market value instead. If the vehicle is genuinely in poor condition, keep documentation of needed repairs, accident history, or high mileage to justify the price.
On the federal side, the IRS treats a vehicle gift like any other gift. For 2026, the annual gift tax exclusion is $19,000 per recipient.6Internal Revenue Service. Frequently Asked Questions on Gift Taxes Give a vehicle worth more than that and you’ll need to file a gift tax return, though you won’t actually owe tax unless your cumulative lifetime gifts exceed $15 million.7Internal Revenue Service. Whats New – Estate and Gift Tax Most people never hit that ceiling, but the filing requirement itself catches people off guard.
How the Price Line Drives Sales Tax
In most states the buyer owes sales tax on the purchase price written on the document. Combined state and local rates vary widely, from zero in the handful of states that don’t charge sales tax on vehicles to over 10 percent in high-tax jurisdictions. A few states calculate the tax on fair market value rather than the stated price, so lowballing the number won’t necessarily reduce the bill.
The motor vehicle office collects sales tax at title transfer and registration. If you bought the car in a state with no sales tax but live in a state that charges one, you’ll owe “use tax” when you register it at home. The bill of sale is the primary document the agency uses to determine the taxable amount.
After the Sale
Title Transfer and Registration
The buyer takes the signed document, the title, and any required odometer disclosure to the motor vehicle agency as soon as possible to update ownership records. Expect a title transfer fee plus registration and plate fees. Those vary widely by state based on vehicle weight, value, and age; some states charge under $30 while others run into the hundreds.
Release of Liability
Sellers should file a notice of transfer or release of liability with their state motor vehicle agency right after the sale. Until that filing is processed, the state still considers you the registered owner, which means parking tickets, toll violations, and even accident liability can come back to you if the buyer doesn’t register the car promptly.
Insurance
The buyer needs coverage before driving the car off the seller’s property. Driving uninsured is illegal in nearly every state, and a car still sitting on the seller’s former policy isn’t covered. Buyers who already have a policy on another vehicle usually get a grace period of roughly seven to thirty days during which the new car gets the same coverage, but confirm that with your insurer before relying on it. Sellers should keep their own coverage active until the release of liability is confirmed, then cancel or transfer it.
Keeping the Record
Both parties should keep a copy for at least three years, which is the IRS’s general statute of limitations for assessing tax. The window stretches to six years if there’s any chance of underreported income exceeding 25 percent of gross income.8Internal Revenue Service. Topic No 305 – Recordkeeping Six years is a safe bet and costs nothing but a file folder. The record proves the exact date ownership transferred and the price paid, which matters for taxes and for any later dispute over who was responsible for the vehicle on a given date.
“As-Is” Sales and the Limits of Buyer Protection
Most private vehicle sales are “as-is”: the buyer takes the car in whatever condition it’s in, and the seller makes no promises about reliability or fitness. The FTC’s Used Car Rule, which requires dealers to display a Buyers Guide disclosing known defects, applies only to businesses that sell more than five vehicles in a twelve-month period. Private sellers are exempt.9Federal Trade Commission. Dealers Guide to the Used Car Rule
State lemon laws generally don’t cover private sales either. If the car breaks down a week later, a buyer’s recourse is typically limited to small claims court, and only if they can prove the seller actively lied about a known defect. An “as-is” clause makes that harder. The practical takeaway for buyers: get a pre-purchase inspection from an independent mechanic. The $100 to $200 that costs is the cheapest insurance available in a private sale.
“As-is” doesn’t protect a seller who committed fraud. Rolling back the odometer, concealing a salvage title, or lying about accident history can expose the seller to civil damages and criminal penalties regardless of what the document says. If a buyer discovers fraud after the purchase, the signed bill of sale and any written communications are the primary evidence in court.