How Much Is Sales Tax on a Car in Washington?

Sales tax on a car in Washington starts at 6.8% statewide and typically lands between 8% and 10.5% of the purchase price once local rates are added. That total breaks into a 6.5% retail sales tax under RCW 82.08.020,¹ a separate 0.3% motor vehicle sales and use tax,² and a local sales tax that varies by jurisdiction. A rural county may put you under 8% total; a metro taxing district can push you above 10%. The Department of Revenue publishes an address lookup tool for the exact combined rate.³

Which Location Sets Your Rate

This is the detail that trips buyers up: a car’s sales tax is based on the dealership’s location, not yours. Washington normally uses destination-based sourcing for retail goods, but motor vehicles are specifically carved out of that rule.⁴ If you drive to a dealership in a lower-tax county, you pay that county’s rate even if you live somewhere more expensive. The dealer paperwork reflects the rate for the taxing district where the sale takes place.

What You Actually Pay Tax On

The taxable amount is not always the sticker price.

A trade-in reduces it. Washington’s definition of “selling price” under RCW 82.08.010 excludes the value of a traded-in vehicle,⁵ so a $35,000 purchase with a $10,000 trade-in is taxed on $25,000. The trade must be “property of like kind,” which vehicle-for-vehicle satisfies.⁶

A manufacturer rebate does not. The state treats a rebate as part of the consideration for the car, so tax applies to the full negotiated price before the rebate is subtracted.⁷ A dealer discount is different: it lowers the actual selling price and therefore the tax.

Several extras get bundled into the taxable total:

Dealer documentation fees, which Washington caps at $200.⁸
Shipping or delivery charges.
Accessories installed before delivery.
Extended warranties and service contracts sold with the vehicle, even if billed separately, plus any deductible you later pay on a warranty claim.⁹

Leased Vehicles

A lease is taxed as you go rather than all at once. Sales tax and the 0.3% motor vehicle tax apply to each monthly payment.² Leases longer than 36 months lose a partial sales tax exemption that applies to shorter terms, so the full rate takes over after the 36th month.

Private-Party Sales and Use Tax

Buying from a neighbor instead of a dealer does not skip the tax. Washington charges a use tax on any vehicle acquired without paying retail sales tax, due from the buyer at title transfer through the Department of Licensing.¹⁰ The rate is the combined state and local sales tax rate at the buyer’s address, plus the 0.3% motor vehicle tax.¹¹ For private sales, in other words, your address does set the rate.

The state does not simply accept whatever number you write on the bill of sale. An automated valuation system fed by Price Digests data estimates fair market value, and if your reported price comes in lower, tax is calculated on the state’s figure.¹¹ If the price was genuinely low because of mechanical trouble, body damage, or high mileage, you and the seller can sign a Declaration of Buyer and Seller Regarding Value of Used Vehicle explaining the condition.¹² The Department of Revenue can accept the lower figure, but it also audits these declarations and may assess back tax, interest, and penalties if it disagrees.

Common Exemptions

Gifts and Inherited Vehicles

A vehicle received as a genuine gift is exempt from use tax, provided the previous owner already paid Washington sales or use tax on it and no money or other consideration changes hands.¹⁰ You do not have to be family. But if the car still has an outstanding loan, the exemption usually fails because the title shows a lienholder and the state treats the transfer as a sale. The loan must be paid off before the gift. A vehicle previously registered in another state gets credit for sales or use tax paid there.

Military Personnel

Nonresident service members temporarily stationed in Washington can buy a car tax-free if they’ll be in the state fewer than 90 days, with orders showing the temporary assignment or an imminent reassignment.¹³

Washington residents on active duty outside the state may be exempt if they bought and took delivery of the vehicle outside Washington, have been on active duty more than six months, and acquired the vehicle at least 30 days before discharge.¹³ Training stints under six months and vehicles bought within 30 days of discharge do not qualify.

Tribal Members

Enrolled members of a federally recognized tribe owe no sales tax when the vehicle is delivered to them in Indian country, or when the sale itself occurs there. The buyer signs a declaration to that effect at registration.¹⁴ Without it, the Department of Licensing collects use tax at title transfer.

Electric and Plug-In Hybrid Vehicles

Washington’s sales and use tax exemption for clean alternative fuel and plug-in hybrid vehicles under RCW 82.08.809 expired on July 31, 2025.¹⁵ EV buyers should check with the Department of Revenue for any current replacement program.

Buying as an Out-of-State Resident

A nonresident buying from a Washington dealer can avoid the sales tax two ways under RCW 82.08.0264. The first is a vehicle trip permit from the Department of Licensing, used to drive the car directly out of state from the point of delivery.¹⁶ “Directly” is literal: no driving around Washington first. The second is to immediately register and license the vehicle in your home state, and keep in-state use under three months total. Either way, the dealer will need to see your out-of-state license, a second document confirming your out-of-state address, and a signed exemption declaration.

Separately, if the dealer physically delivers the vehicle to a point outside Washington using its own truck or a third-party carrier, the sale is not subject to Washington sales tax at all.¹⁷

Moving to Washington With a Car You Already Own

Ownership before the move is what matters. If you acquired and used the vehicle in another state for more than 90 days before establishing Washington residency, no use tax is due, and you have 30 days after moving to license it and preserve that exemption.¹⁸ The exemption covers personal passenger vehicles only, not motor homes, trailers, or off-road vehicles.

If you bought the car within 90 days of your move, you owe use tax at registration, but Washington credits any sales or use tax already paid to another state. Pay 5% elsewhere and face a 9% Washington rate, and you owe the 4% difference. No credit is given for licensing fees or foreign value-added taxes such as Canada’s GST.

A Separate Bill in the Puget Sound Area

Buyers in parts of King, Pierce, or Snohomish County that fall within the Sound Transit district pay a Regional Transit Authority motor vehicle excise tax on top of everything else. It is not a sales tax, but it affects what you’ll owe. The RTA tax is 1.1% annually at purchase and every tab renewal, calculated on the vehicle’s original MSRP under a depreciation schedule rather than on what you paid: 100% of MSRP in year one, 74% by year five, 31% by year ten, bottoming out at 10% for vehicles 13 years and older.¹⁹ A fifth-year vehicle with a $40,000 MSRP works out to about $326 annually.

Late Payment Penalties

There is no grace period. Miss the due date on use tax and a 9% penalty applies immediately. By the end of the following month it climbs to 19%, and by the end of the second month after the due date it reaches 29%.²⁰ Interest also accrues on the balance at the federal short-term rate plus two points. On a $2,000 bill, the 29% penalty alone is $580 before interest, which is reason enough to register and pay as soon as the vehicle changes hands.

1
Washington State Legislature. RCW 82.08.020 – Tax Imposed – Retail Sales – Retail Car Rental
2
Washington Department of Revenue. Motor Vehicle Sales/Use Tax
3
Washington Department of Revenue. Local Sales and Use Tax
4
Washington State Legislature. RCW 82.32.730
5
Washington State Legislature. RCW 82.08.010 – Definitions
6
Cornell Law Institute. Washington Administrative Code 458-20-247 – Trade-Ins, Selling Price, Sellers Tax Measures
7
Washington Department of Revenue. Discounts/Rebates
8
Washington Department of Revenue. Miscellaneous
9
Washington Department of Revenue. Warranties
10
Washington Department of Revenue. Use Tax Facts for Vehicle Transactions
11
Washington State Department of Licensing. Use Tax
12
Washington State Department of Revenue. Declaration of Buyer and Seller Regarding Value of Used Vehicle Sold
13
Washington State Department of Licensing. Vehicle Tax Exemptions for Military Personnel
14
Cornell Law Institute. Washington Administrative Code 458-20-192 – Indians – Indian Country
15
Washington Department of Revenue. New Clean Alternative Fuel and Plug-In Hybrid Vehicle Sales and Use Tax Exemption
16
Washington State Legislature. RCW 82.08.0264
17
Washington Department of Revenue. Out-of-State Delivery Sales
18
Washington Department of Revenue. Vehicles Brought Into Washington From Out-of-State
19
Washington State Department of Licensing. Regional Transit Authority (RTA) Tax
20
Cornell Law Institute. Washington Administrative Code 458-20-228 – Returns, Payments, Penalties