Idaho Car Bill of Sale: Form ITD 3738 + Requirements
Idaho is one of 16 US states that require a bill of sale for private vehicle title transfer. The state publishes Form ITD 3738 (Bill of Sale) as the standard template. Notarization is not required.
Is a bill of sale required in Idaho?
Yes. Idaho requires a signed bill of sale for private vehicle title transfer.
Notarization
Not required.
State-specific form
Form ITD 3738 (Bill of Sale) is published by the Idaho Transportation Department. Available at itd.idaho.gov.
The form must include:
- Seller's full legal name, address
- Buyer's full legal name, address
- Vehicle year, make, model, body type, VIN
- Odometer reading
- Sale price
- Date of sale
- Both signatures
Sales tax implications
Idaho state sales tax: 6% on motor vehicle sales. Local sales tax adds in some areas (resort cities); typically 6–9% total.
The buyer pays at the county assessor's office at title transfer.
State-specific seller disclosures
- Odometer disclosure: federally required for vehicles under 20 years old
- No statewide emissions testing: most counties don't require periodic emissions inspection (Ada and Canyon counties have programs)
- Salvage title disclosure: required if branded
- VIN inspection: required for out-of-state vehicles being titled in Idaho
Where to file
The buyer files at the county assessor's office in their county of residence within 30 days of sale.
For a more complete national reference, see the national bill of sale guide.
Frequently asked questions
Do I need a bill of sale in Idaho?
Yes. Idaho requires a signed bill of sale for private vehicle title transfer.
Does Idaho require a notarized bill of sale?
No.
What's the sales tax on a private car sale in Idaho?
6% statewide. Some resort cities add local sales tax; typically 6–9% total.
What form do I use?
Form ITD 3738 (Idaho Bill of Sale), available at itd.idaho.gov.
Where do I file the bill of sale in Idaho?
At the county assessor's office in the buyer's county of residence. Within 30 days of sale.
Does Idaho require emissions testing?
Yes in Ada and Canyon counties (Boise and surrounding area). Other counties don't require periodic emissions inspection.
What if I lost the title in Idaho?
Apply for a duplicate at the county assessor's office or the ITD.
Should I disclose flaws on the bill of sale?
The "as-is" disclosure covers most. Disclose salvage or rebuilt status and major defects.
Selling a car in Idaho?
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