How to Sell a Car Privately in Idaho

Sources checked October 9, 2026 · Every rule below links to the official page it came from

Selling your car yourself in Idaho comes down to a signed title, the right paperwork, and a few steps people often miss. This guide summarizes what the Idaho Transportation Department, Division of Motor Vehicles and state law say, so you and the buyer can finish the transfer cleanly.

Transferring the title

• The seller signs the title on the seller's signature line and enters the date sold. apps.itd.idaho.gov
• The seller must have the vehicle titled in their own name before selling it, unless they hold an ITD dealer's license. apps.itd.idaho.gov
• The buyer needs the existing title with proper signatures releasing interest from the previous owner or lienholder. itd.idaho.gov
• An Idaho resident buyer must title a vehicle bought in Idaho within 30 days of purchase, and a $20 late penalty applies after 30 days. itd.idaho.gov

Bill of sale

• The seller must create a bill of sale if the title has no 'selling price' field. apps.itd.idaho.gov
• ITD offers a Bill of Sale form (ITD 3738) listing the vehicle, odometer reading, true selling price, sale date, new lienholder and both parties' details. itd.idaho.gov
• The buyer must show a bill of sale or receipt as proof of the sales price when titling in Idaho, and a cancelled check is not accepted. tax.idaho.gov
• The bill of sale form states that listing a false selling price, name or address is a felony under Idaho Code section 49-518(5). itd.idaho.gov
• If a properly released title cannot be obtained, a bill of sale may be used only with additional steps on the Conditional Title Statement of Facts form. itd.idaho.gov

License plates

• ITD says the license plates belong to the seller and do not go with the vehicle, and the seller may move them to another vehicle they own. apps.itd.idaho.gov
• The release of liability form reminds sellers to remove their plates at sale or transfer. itd.idaho.gov

Inspections and emissions

• A VIN inspection is required only if the vehicle is coming from another state or has never been titled in Idaho. itd.idaho.gov
• Idaho's legislature repealed the state requirement for vehicle emissions testing programs effective July 1, 2023. deq.idaho.gov

Telling the state you sold the car

• The seller can file a Notice of Release of Liability (ITD 3858) within five days of delivering the vehicle. itd.idaho.gov
• The filing may protect the seller from liability for injury, property damage, infractions and towing or storage charges arising after the buyer takes delivery. itd.idaho.gov
• The seller can file online or at the county assessor's motor vehicle office, and the record stays in the seller's name until the buyer's title is issued. itd.idaho.gov

Taxes and fees the buyer pays

• Buyers who purchase vehicles from private parties owe use tax when they apply for title, unless an exemption applies. tax.idaho.gov
• If there is no bill of sale, tax is collected on the NADA value, and a buyer may sign an affidavit stating a lower price, which is flagged for review if well below that value. tax.idaho.gov
• Trade-in allowances are not allowed on private party sales. tax.idaho.gov

Loans and liens

• If the seller has a recorded lien, it must be released on the title or on a separate form before the buyer can title the vehicle. apps.itd.idaho.gov
• If the title cannot be filed in time, a Transitional Ownership Document ($26) is due within 30 days of the sale. itd.idaho.gov

Easy-to-miss rules in this state

• If a seller does not file a release and an abandoned vehicle goes unclaimed seven days after towing, the owner of record is presumed responsible for an infraction. apps.itd.idaho.gov
• If the seller filed a proper release, the buyer named on it is presumed responsible. apps.itd.idaho.gov

Official Idaho resources

• ITD: Vehicle titles
• ITD: Notice of Release of Liability (form 3858)
• ITD: Bill of Sale (form 3738)
• ITD: Drivers Manual chapter 10, vehicle title and registration
• Idaho State Tax Commission: Sales price (motor vehicles)
• Idaho State Tax Commission: Sales and use tax guide for vehicle transactions
• Idaho DEQ: Vehicle emissions

Next steps

Once you know the rules, create a free listing and print a QR code sign for the car window. For the general process, see our step-by-step private sale guide, the paperwork checklist, and how to get paid safely. Need paperwork? Use our free bill of sale generator.

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