Idaho Vehicle Bill of Sale Overview
Private vehicle sales in Idaho benefit from one of the more straightforward processes in the country. The Gem State charges a flat 6% sales tax with no additional local or county taxes on vehicle purchases, making it easy to calculate your total cost upfront. The bill of sale is the primary document used to establish the sale price and record the details of the transaction between buyer and seller.
The Idaho Transportation Department (ITD) oversees vehicle titling and registration statewide, but the actual processing happens at the county assessor's motor vehicle office. Idaho has 44 counties, and each county assessor handles title transfers, registration, and tax collection. Whether you are buying a truck in Boise or a sedan in Idaho Falls, the same statewide requirements apply.
Idaho does not require notarization of the bill of sale or the title assignment for standard private party sales. Emissions testing is limited to Ada County (the Boise metro area), so most Idaho residents will not need to worry about an emissions certificate. Registration fees are based on the age of the vehicle rather than its value, keeping costs predictable for buyers of older vehicles.
6%
Flat sales tax
30 Days
Transfer deadline
No
Notarization required
Ada Only
Emissions test
Idaho ITD Requirements
The Idaho Transportation Department sets the statewide rules for vehicle transfers. Here is what both parties need to prepare for a smooth transaction at the county assessor's office:
Important: Idaho's 30-Day Transfer Deadline
Idaho law requires the buyer to apply for a title transfer within 30 days of the purchase date. Failing to meet this deadline can result in late penalties. The date recorded on your bill of sale starts the 30-day clock, so visit the county assessor's office promptly after the purchase.
What the Seller Must Provide
- Signed Vehicle Title: The seller must sign the title assignment and complete the buyer's name, sale date, sale price, and odometer reading
- Bill of Sale: A completed bill of sale with buyer/seller information, vehicle details, VIN, sale price, date, and both signatures
- Odometer Disclosure: Federal requirement — mileage must be recorded accurately on the title or a separate form
- Lien Release: If the vehicle had financing, a lien release letter from the lender is required
What the Buyer Must Bring to the County Assessor
- Signed Title: With the seller's signature and all required fields filled in
- Bill of Sale: Signed by both buyer and seller
- Valid Photo ID: Idaho driver's license or state-issued identification card
- Proof of Insurance: Idaho minimum liability coverage ($25,000/$50,000/$15,000)
- Emissions Certificate: Required only if registering in Ada County (Boise metro)
- Payment: Title fee ($14), age-based registration ($24-$69), and 6% sales tax
How to Fill Out an Idaho Vehicle Bill of Sale
Use these steps to complete your Idaho vehicle bill of sale accurately. Our template covers every field the county assessor needs to process the transfer without delay.
Enter Seller Information
Write the seller's full legal name exactly as it appears on the Idaho vehicle title. Include the current mailing address and phone number. When the title lists two owners joined by "and," both must sign the bill of sale and title. If joined by "or," either owner may complete the sale on their own.
Enter Buyer Information
Provide the buyer's full legal name exactly as it should appear on the new Idaho title, residential address, and phone number. The county where the buyer lives determines which assessor's office handles the transfer and whether emissions testing applies (Ada County only).
Describe the Vehicle
Record the year, make, model, body type, and exterior color. Locate the 17-character VIN on the dashboard plate visible through the windshield or on the driver's side door jamb. Double-check that the VIN on the vehicle matches the title — a mismatch will prevent the county assessor from processing the transfer.
Record the Odometer Reading
Document the exact odometer mileage at the time of sale and indicate whether the reading is accurate, exceeds the instrument's mechanical limits, or does not represent actual mileage. This is a federal requirement under NHTSA regulations. Vehicles that are 20 years old or older and those over 16,000 lbs GVWR may be exempt.
State the Sale Price
Enter the agreed purchase price in both numbers and words. Idaho's county assessor will calculate the 6% sales tax based on this figure. If the vehicle is a gift, write "$0 — Gift" and note that Idaho may still assess tax on the vehicle's fair market value for non-family gift transfers.
Sign and Date
Both the buyer and seller must sign and date the bill of sale. Print two copies so each party retains one. Idaho does not require notarization, so signatures can be completed anywhere. The buyer should take all documents to the county assessor's motor vehicle office within 30 days of the sale date.
Idaho Title Transfer Process
Once the sale is complete, the buyer must visit the county assessor's motor vehicle office in the county where they reside. Idaho's 44 county assessors all follow the same ITD guidelines for processing title transfers.
Complete the Sale
Sign the bill of sale, assign the title, exchange payment and keys
Obtain Insurance
Secure Idaho minimum liability insurance before visiting the county office
Pass Emissions (Ada County Only)
If you live in Ada County, complete the emissions test before your office visit
Visit Your County Assessor's Office
Bring signed title, bill of sale, photo ID, proof of insurance, and emissions certificate if required
Pay Taxes and Fees
Title fee ($14), age-based registration ($24-$69), and 6% sales tax on the sale price
Idaho Vehicle Sales Tax & Fees
Idaho simplifies vehicle taxes with a flat 6% rate and no additional local taxes for vehicle purchases. Registration is based on vehicle age, keeping costs lower for older vehicles. Here is a breakdown of all the costs involved:
| Fee / Tax | Amount |
|---|---|
| State Sales Tax | 6% of sale price (flat, no local tax) |
| Title Transfer Fee | $14 |
| Registration Fee | $24 - $69 (based on vehicle age) |
| County Road & Bridge Fee | Varies by county |
| License Plates | $8 (standard) or transfer existing plates |
| Emissions Test (Ada County) | ~$15 (biennial, Ada County only) |
| Duplicate Title | $14 |
Sample Idaho Vehicle Bill of Sale
Below is a preview of our Idaho-specific vehicle bill of sale. Your customized document will include all fields required by Idaho county assessor offices and the Idaho Transportation Department.
STATE OF IDAHO
VEHICLE BILL OF SALE
Private Party Motor Vehicle Transfer
SELLER:
Name: [Seller Name]
Address: [Idaho Address]
County: [County]
BUYER:
Name: [Buyer Name]
Address: [Idaho Address]
County: [County]
VEHICLE INFORMATION
Year: [Year] Make: [Make] Model: [Model]
VIN: [17-digit VIN]
Odometer: [Miles] miles
Sale Price: $[Amount]
Idaho Vehicle Bill of Sale FAQ
Answers to common questions about Idaho vehicle bills of sale, title transfers, sales tax, and county assessor requirements.
Official Idaho Resources
Use these official state and federal resources to verify Idaho requirements, find your county assessor's office, and access government forms for your vehicle transaction.
Idaho Transportation Department — DMV
Title transfers, registration, and county office locator
Idaho DMV Forms Library
Download official Idaho title and registration forms
NHTSA — Odometer Fraud Prevention
Federal odometer disclosure requirements and fraud reporting
NICB VINCheck — Free Vehicle History
Check if a vehicle has been reported stolen or salvaged
NHTSA VIN Decoder
Decode any VIN to verify year, make, model, and specifications
IRS — Vehicle Sale Tax Reporting
Federal tax implications of selling a vehicle
Other Idaho Bill of Sale Templates
Need a different type of bill of sale for Idaho? We offer state-specific templates for every type of property transfer across the Gem State.
Idaho Boat Bill of Sale
Boats, jet skis, and watercraft
Idaho Motorcycle Bill of Sale
Motorcycles, scooters, and mopeds
Idaho Trailer Bill of Sale
Utility, travel, and cargo trailers
Idaho Firearm Bill of Sale
Handguns, rifles, and shotguns
Idaho General Bill of Sale
Furniture, electronics, and personal property
Idaho ATV Bill of Sale
ATVs, UTVs, and off-road vehicles
Idaho Horse Bill of Sale
Horses, cattle, and livestock
Idaho Mobile Home Bill of Sale
Manufactured and mobile homes
Create Your Idaho Vehicle Bill of Sale
Answer a few questions and download your Idaho-compliant document in minutes. Accepted by all 44 Idaho county assessor offices.
No account required. Free to create and preview.