Last checked Nov 10, 2026
Buying a car in Wyoming
The tax you will pay, whether your trade-in lowers it, what the dealer may charge for paperwork, and where to title and register. Taken from official Wyoming sources.
- State tax on vehicles
- 4%
- Trade-in lowers tax
- Yes
- Doc fee limit
- Check with the state
- Deadline to title or register
- Check with the state
Sales tax on a car in Wyoming
Wyoming charges a state sales tax of 4% on vehicle purchases.
County local option taxes are added to the 4% state rate, and the rate in the county of the owner's principal residence applies.
Dealers do not collect the tax; the buyer pays it to the county treasurer within 65 days of the purchase date. Late payment carries a penalty of 10% of the tax due, with a $25 minimum, plus interest of 1% per month.
Does a trade-in lower the tax?
The trade-in allowance is subtracted from the sales price, but only if the trade-in vehicle's title is already in the purchaser's name.
Example, state tax only. On a $30,000 car with a $10,000 trade-in, the taxable amount is $20,000, so the state tax is about $800. Without the trade-in it would be $1,200. Local taxes and fees are extra.
Dealer doc fees in Wyoming
We could not confirm from an official source whether the state limits the documentation fee. Ask the dealer for the fee in writing and compare it with other dealers.
The documentation fee is taxed along with the vehicle.
Whatever the rule, the fee is part of your out-the-door price. Ask for it in the written quote and negotiate the total, not the line. See dealer fees explained.
Title and registration
Titles and registrations are handled by the Wyoming county clerk (title) and county treasurer (sales tax and registration). The county clerk does not deliver a title until the sales tax receipt from the county treasurer is presented. Sales tax is due within 65 days of purchase.
Also worth knowing
- The state sales tax form lists documentary fees as part of the total sales price on which tax is calculated.
- A manufacturer's rebate assigned to the dealer at the time of sale is subtracted from the taxable amount.
- A buyer in a private sale may operate the vehicle without registration for 45 days from the purchase date with a properly executed title.
- Titling and licensing fees and extended warranties are not part of the taxable sales price.
Sources
- Wyoming Department of Revenue: Sales/Use Tax Statement for Motor Vehicle Sales (Form 107) (dot.state.wy.us)
- Wyoming Legislature: 2026 Senate File 79, Enrolled Act 18 (sales tax statutes W.S. 39-15-104 and 39-15-107) (wyoleg.gov)
- Wyoming Department of Revenue presentation to the Joint Revenue Committee: Sales and Use Tax Distribution (August 2025) (wyoleg.gov)
- WYDOT memorandum: Operation of Newly Acquired Vehicles (September 22, 2023) (dot.state.wy.us)
Last checked Nov 10, 2026; next review by Feb 10, 2027. This page explains how the rules generally work and is not tax or legal advice. Rules change, so confirm with the state. Report an error.
Concierge
Rather not do this part yourself?
Tell us the car you want. A person finds it, checks it, negotiates the out-the-door price in writing, and lines up the paperwork. You approve every step.