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State Guide Last verified September 17, 2026

Washington Car Sales Tax, Trade-In Credit, and Out-of-State Rules

What the desk and the buyer each need to know when a Washington deal crosses state lines: the rate, the trade-in math, the exemption paperwork, and the drive-home tags. Every fact links to the official source.

Check an Out-of-State Deal Jump to Quick Facts

Every fact sourced to Washington official publications below

Short answer

Washington taxes vehicle sales at 7.0% (6.5% state retail sales tax + 0.5% motor vehicle sales/lease tax) state plus local add-ons (depends on the dealer's location). Washington taxes the price after the trade-in is deducted. Washington exempts out-of-state buyers only under specific conditions. Washington credits sales tax legally paid to another state, so the same dollars are not taxed twice. All of this describes a retail purchase from a dealer; leases and private-party sales run on different rules in most states.

Washington car sales tax quick facts

Last verified September 17, 2026
Sales tax rate on vehicles7.0% (6.5% state retail sales tax + 0.5% motor vehicle sales/lease tax) state plus local add-ons (depends on the dealer's location)[1]
Trade-in creditWashington taxes the price after the trade-in is deducted. The trade-in must be property of like kind: a motor vehicle traded in on a motor vehicle.[2]
Selling to an out-of-state buyerWashington exempts out-of-state buyers only under specific conditions. The exemption turns on how the vehicle leaves Washington, not just on the buyer being a nonresident. Either the vehicle leaves the dealer's premises under the authority of a trip permit, or the dealer delivers it to the buyer outside Washington. The vehicle cannot be licensed or titled in Washington, and any valid Washington plates must be removed before final delivery. The dealer must take the required affidavit or certificate in good faith and keep it in the deal file.[3]
Credit for tax paid to another stateWashington credits sales tax legally paid to another state, so the same dollars are not taxed twice.[4]
Dealer doc feeCapped at $200[5] · not taxable[5]
Temp tag for the drive homeFor a nonresident buyer taking the vehicle out of Washington, the vehicle leaves under a trip permit. A trip permit is valid for 3 consecutive days beginning with the first day of use, costs $36, and up to 3 permits may be issued for any one vehicle in a 30-day period.[6]
Out-of-state buyer registrationWashington ties vehicle registration to residency and to the driver license: you have 30 days after moving to Washington to get your driver license and register your vehicle, and DOL requires the Washington driver license before it will register the vehicle. Bring the current out-of-state title to any vehicle licensing office (note the odometer reading first); driver licensing and vehicle licensing are done at separate offices.[7]

Washington car sales tax calculator

Enter the sale price and any trade-in to estimate Washington 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.

General information, not tax or legal advice. Everything on this page was compiled from official Washington government publications (listed under Sources) and last verified September 17, 2026, but rates and rules change and errors are possible. Voltra makes no warranty as to accuracy or completeness and accepts no liability for decisions made on this data. Confirm the current rules with the Washington State Department of Revenue or a licensed professional before acting on anything here. Covers retail dealer sales; leases and private-party sales follow different rules in most states.

From the desk

Washington stacks high local rates plus an extra motor-vehicle addition on top, keyed to address, and the no-tax Oregon border makes exemption paperwork a permanent fixture of the desk. Getting the location code right is the whole game.

Selling to an out-of-state buyer in Washington

Washington exempts out-of-state buyers only under specific conditions. The exemption turns on how the vehicle leaves Washington, not just on the buyer being a nonresident. Either the vehicle leaves the dealer's premises under the authority of a trip permit, or the dealer delivers it to the buyer outside Washington. The vehicle cannot be licensed or titled in Washington, and any valid Washington plates must be removed before final delivery. The dealer must take the required affidavit or certificate in good faith and keep it in the deal file.[3]

What makes the exemption stick is Use by Nonresident Buyer of Vehicle affidavit (in-state delivery under a trip permit); Certificate of Out of State Delivery (delivery outside Washington), completed at delivery. Without it, the assessment letter goes to the dealership, not the buyer.

Either way, collecting the right tax is the easy part. The title work, the temp tag, and the out-of-state registration still have to land, and each one runs on its own clock.

Buying in Washington from out of state

If you live in another state and buy in Washington, the deciding rule is where the vehicle gets registered: your home state's tax applies at registration, and what happens at the Washington sale depends on the rule above. Washington credits sales tax legally paid to another state, so the same dollars are not taxed twice.[4]

Registration and temp tags

For a nonresident buyer taking the vehicle out of Washington, the vehicle leaves under a trip permit. A trip permit is valid for 3 consecutive days beginning with the first day of use, costs $36, and up to 3 permits may be issued for any one vehicle in a 30-day period.[6] Washington ties vehicle registration to residency and to the driver license: you have 30 days after moving to Washington to get your driver license and register your vehicle, and DOL requires the Washington driver license before it will register the vehicle. Bring the current out-of-state title to any vehicle licensing office (note the odometer reading first); driver licensing and vehicle licensing are done at separate offices.[7]

Bordering states

Cross-border deals from Washington most often involve Idaho and Oregon. The combination decides the outcome, so check both states in the out-of-state checker.

Vehicle-type exceptions

The extra 0.5% motor vehicle sales/lease tax only applies to self-propelled vehicles. Farm tractors, farm vehicles, off-road vehicles, non-highway vehicles, trailers, and snowmobiles are excluded from that addition, though ordinary state and local sales tax still applies to them. RVs and motorhomes, motorcycles, buses, pickups, and commercial trucks are included.[8]

Sources

  1. app.leg.wa.gov/RCW/default.aspx?cite=82.08.020 · verified 2026-08-30
  2. dor.wa.gov/education/industry-guides/auto-dealers/trade-ins · verified 2026-08-23
  3. dor.wa.gov/…/exempt-vehicle-sales · verified 2026-08-30
  4. app.leg.wa.gov/RCW/default.aspx?cite=82.12.035 · verified 2026-08-23
  5. dor.wa.gov/education/industry-guides/auto-dealers/miscellaneous · verified 2026-08-23
  6. dol.wa.gov/…/trip-permits-unlicensed-vehicles · verified 2026-08-23
  7. dol.wa.gov/moving-washington/vehicle-registration-and-plates · verified 2026-09-17
  8. dor.wa.gov/taxes-rates/other-taxes/motor-vehicle-salesuse-tax · verified 2026-08-23
Cite this page

“Washington Car Sales Tax & Out-of-State Rules.” Voltra. Last verified September 17, 2026. https://voltra.ai/car-sales-tax/washington/

More state-by-state guides: trade-in tax credit by state · recent rule changes · all states + the out-of-state checker

Washington car sales tax questions

Washington taxes vehicle sales at 7.0% (6.5% state retail sales tax + 0.5% motor vehicle sales/lease tax) state plus local add-ons (depends on the dealer's location). It applies to the taxable price the desk calculates, and the trade-in and doc-fee rules are what shape that figure.

Washington taxes the price after the trade-in is deducted. The trade-in must be property of like kind: a motor vehicle traded in on a motor vehicle. Because that treatment sets the taxable price, an identical car and trade can owe different tax on either side of a state line.

Washington exempts out-of-state buyers only under specific conditions. The exemption turns on how the vehicle leaves Washington, not just on the buyer being a nonresident. Either the vehicle leaves the dealer's premises under the authority of a trip permit, or the dealer delivers it to the buyer outside Washington. The vehicle cannot be licensed or titled in Washington, and any valid Washington plates must be removed before final delivery. The dealer must take the required affidavit or certificate in good faith and keep it in the deal file. The exemption runs on Use by Nonresident Buyer of Vehicle affidavit (in-state delivery under a trip permit); Certificate of Out of State Delivery (delivery outside Washington), completed at delivery.

Washington credits sales tax legally paid to another state, so the same dollars are not taxed twice.

Washington caps dealer doc fees at $200. The doc fee is not taxed.

Start with the sale price and subtract the trade-in allowance (Washington credits it in full), then multiply by 7.0% (6.5% state retail sales tax + 0.5% motor vehicle sales/lease tax) state plus local add-ons (depends on the dealer's location) plus any local add-on. The dealer doc fee is not part of the taxable price in Washington. The Washington calculator on this page runs those steps with the verified figures and shows the out-the-door estimate before title and registration fees.