Short answer
Wyoming taxes vehicle sales at 4% state plus local add-ons (depends on the buyer's address). Wyoming taxes the price after the trade-in is deducted. Wyoming exempts out-of-state buyers only under specific conditions. Wyoming credits sales tax legally paid to another state, so the same dollars are not taxed twice. The rules above cover retail dealer sales; most states handle leases and private-party sales separately.
Wyoming car sales tax quick facts
Last verified August 29, 2026| Sales tax rate on vehicles | 4% state plus local add-ons (depends on the buyer's address)[1] |
| Trade-in credit | Wyoming taxes the price after the trade-in is deducted. The trade-in and the purchase have to happen in one transaction.[2] |
| Selling to an out-of-state buyer | Wyoming exempts out-of-state buyers only under specific conditions. The buyer must be a non-resident of Wyoming and the vehicle must be removed from Wyoming within thirty days of purchase. Form 105a has to be provided at the time of purchase with all name and address sections completed and signed by the purchaser, and it is invalid without the buyer's out-of-state driver's license number and state of licensure. The dealer keeps the form for at least three years and does not send it to the Department of Revenue.[3] |
| Credit for tax paid to another state | Wyoming credits sales tax legally paid to another state, so the same dollars are not taxed twice. The credit is capped at the Wyoming liability. If the other state's tax was lower, only the difference is due before first registration in Wyoming; if it was higher, the Wyoming obligation is fully offset and nothing more is due, but the excess is not refunded. Wyoming names no non-reciprocal states.[4] |
| Dealer doc fee | Cap: being verified · taxable[5] |
| Temp tag for the drive home | Wyoming dealers must issue a temporary license permit on every retail vehicle sale, with no residency carve-out, so an out-of-state buyer gets one at the desk. The permit lets the vehicle be driven without registration for 60 days from the date of purchase, and the buyer should be able to produce a copy of the dealer's invoice of sale as evidence of the purchase. Dealers order permits from WYDOT's Licensing Section or a Wyoming port of entry, issue them in the same names that will appear on the new title, and cannot issue a second permit on the same vehicle in the same owner's name.[6] |
| Out-of-state buyer registration | Wyoming registration is filed with a county treasurer, not a central DMV. A resident files in the county where they live; anyone who does not live in Wyoming may file in any county. Registration becomes mandatory once a previous nonresident owner becomes a Wyoming resident, and immediately if someone from out of state operates the vehicle here for gainful employment or a trade, profession or occupation. A nonresident working in Wyoming can skip registration by buying a temporary worker registration permit from the county treasurer instead, at $50 per month and no more than 180 days per vehicle, as long as the vehicle still displays valid plates from another jurisdiction and is insured.[7] |
Wyoming car sales tax calculator
Enter the sale price and any trade-in to estimate Wyoming vehicle tax and the out-the-door total before title and registration. It applies the verified rate, trade-in rule and doc fee treatment from the quick facts above.
From the desk
Wyoming adds county rates to a low state number and collects at the county treasurer within a deadline that surprises new buyers. The desk's quote is a heads-up for a bill someone else collects.
Selling to an out-of-state buyer in Wyoming
Wyoming exempts out-of-state buyers only under specific conditions. The buyer must be a non-resident of Wyoming and the vehicle must be removed from Wyoming within thirty days of purchase. Form 105a has to be provided at the time of purchase with all name and address sections completed and signed by the purchaser, and it is invalid without the buyer's out-of-state driver's license number and state of licensure. The dealer keeps the form for at least three years and does not send it to the Department of Revenue.[3]
None of it works without ETS Form 105a (Sales/Use Tax Exemption Affidavit, Non-Resident Purchase of a Motor Vehicle for Use Outside of Wyoming), completed at delivery. Skip the form and the state looks to the dealer for the tax, not the buyer.
The desk's job doesn't end at the tax line. Somebody still has to chase the title, the temp tag, and the buyer's home-state registration until each one lands.
Buying in Wyoming from out of state
If you live in another state and buy in Wyoming, the deciding rule is where the vehicle gets registered: your home state's tax applies at registration, and what happens at the Wyoming sale depends on the rule above. Wyoming credits sales tax legally paid to another state, so the same dollars are not taxed twice. The credit is capped at the Wyoming liability. If the other state's tax was lower, only the difference is due before first registration in Wyoming; if it was higher, the Wyoming obligation is fully offset and nothing more is due, but the excess is not refunded. Wyoming names no non-reciprocal states.[4]
Registration and temp tags
Wyoming dealers must issue a temporary license permit on every retail vehicle sale, with no residency carve-out, so an out-of-state buyer gets one at the desk. The permit lets the vehicle be driven without registration for 60 days from the date of purchase, and the buyer should be able to produce a copy of the dealer's invoice of sale as evidence of the purchase. Dealers order permits from WYDOT's Licensing Section or a Wyoming port of entry, issue them in the same names that will appear on the new title, and cannot issue a second permit on the same vehicle in the same owner's name.[6] Wyoming registration is filed with a county treasurer, not a central DMV. A resident files in the county where they live; anyone who does not live in Wyoming may file in any county. Registration becomes mandatory once a previous nonresident owner becomes a Wyoming resident, and immediately if someone from out of state operates the vehicle here for gainful employment or a trade, profession or occupation. A nonresident working in Wyoming can skip registration by buying a temporary worker registration permit from the county treasurer instead, at $50 per month and no more than 180 days per vehicle, as long as the vehicle still displays valid plates from another jurisdiction and is insured.[7]
Bordering states
Cross-border deals from Wyoming most often involve Colorado, Idaho, Montana, Nebraska, South Dakota and Utah. Every pair works differently; run the exact combination in the out-of-state checker.
Vehicle-type exceptions
Wyoming runs two collection tracks. Cars, trailers, house trailers, trailer coaches and semitrailers are not taxed by the dealer at all: the county treasurer collects before the first Wyoming registration at the rate for the buyer's county of principal residence, and payment is due within 65 days of the sale. Motorcycles, mopeds and off-road recreational vehicles go the ordinary retail route, with the vendor collecting at the rate where the customer takes possession. The department's own example: a moped bought from a Campbell County dealer and picked up at the store is taxed at the Campbell County rate.[4]
Sources
- excise-tax-div.wyo.gov/general-administrative/excise-tax-faqs · verified 2026-08-27
- wyoleg.gov/statutes/compress/title39.pdf · verified 2026-08-29
- drive.google.com/…/uc · verified 2026-08-29
- drive.google.com/…/uc · verified 2026-08-29
- drive.google.com/…/uc · verified 2026-08-29
- www.dot.state.wy.us/…/WYDOT%20Temporary%20Permit%20Rules-1.pdf · verified 2026-08-29
- wyoleg.gov/statutes/compress/title31.pdf · verified 2026-08-29
“Wyoming Car Sales Tax & Out-of-State Rules.” Voltra. Last verified August 29, 2026. https://voltra.ai/car-sales-tax/wyoming/
More state-by-state guides: trade-in tax credit by state · recent rule changes · all states + the out-of-state checker