Bill of sale, explained

What it means

A bill of sale is a written receipt that proves you bought a car. It lists the buyer, seller, vehicle identification number, odometer reading, sale price, date, and signatures from both parties. In a dealership transaction, the bill of sale is part of the contract packet. In a private-party sale, you usually need to draft one yourself or download a state-specific template. Some states require a bill of sale to transfer the title and register the car; others treat it as optional but helpful for tax and legal purposes.

Why it matters

Without a bill of sale, you have no proof of what you paid or that the seller agreed to transfer ownership. If the title is lost in the mail or the seller disappears, the bill of sale is your fallback evidence. It also protects the seller by documenting that the car left their possession on a specific date, which matters for liability if the buyer drives uninsured and causes an accident before re-registering. Many DMVs use the sale price on the bill to calculate sales tax, so accuracy matters for both parties.

What to do

Download your state's bill-of-sale form from the DMV website or use a generic template that includes VIN, odometer, price, and signatures. Keep a copy for your records and give the original to the buyer or DMV as required. If you're deciding whether to sell privately or trade in, our sell or keep analysis walks through the paperwork and tax trade-offs.