Washington state sales tax exemptions fall into three groups: certain buyers (like the federal government, tribal members purchasing in Indian country, and businesses buying for resale), certain goods (groceries, prescription drugs, manufacturing and farm equipment), and certain situations (trade-ins and out-of-state deliveries). Most exemptions require you to give the seller a completed exemption certificate at the time of purchase, and skipping that step can mean paying tax you did not actually owe.
The state rate is 6.5%, with local add-ons pushing the combined rate higher depending on where the sale takes place.1Washington Department of Revenue. Use Tax An exemption eliminates that charge, but only if you fit one of the categories the law actually recognizes.
Buyers Who Do Not Owe Sales Tax
The federal government and its agencies cannot be charged Washington sales tax, under both the U.S. Constitution’s Supremacy Clause and state statute.2Washington State Legislature. RCW 82.08.020 – Tax Imposed, Retail Sales, Retail Car Rental Foreign diplomats and consular officials are also exempt, but only when they present a valid tax exemption card issued by the U.S. Department of State’s Office of Foreign Missions at the time of purchase.3United States Department of State. Sales Tax Exemption
Federally recognized Indian tribes and their enrolled members do not owe sales tax when goods are delivered to Indian country or the sale happens there. Services performed for a tribe or member in Indian country are also excluded, and when a service spans both on- and off-reservation locations, only the on-reservation portion escapes the tax.4Cornell Law Institute. Washington Code WAC 458-20-192 – Indians – Indian Country Where the transaction happens matters as much as who the buyer is.
One point to clear up: nonprofits in Washington generally do pay sales tax on their purchases. Unlike some other states, Washington offers no broad exemption for 501(c)(3) organizations. A handful of narrow exceptions exist for specific nonprofit activities, but routine purchases of supplies, furniture, and equipment are taxable.
The Resale Exemption and Reseller Permits
Buying inventory for resale is not a taxable retail purchase. The tax code defines “retail sale” to exclude goods bought by someone who will resell them in the regular course of business without using them first.5Washington State Legislature. RCW 82.04.050 – Sale at Retail, Retail Sale That keeps the same item from being taxed at every link in the supply chain.
To buy tax-free at wholesale, you need a reseller permit from the Department of Revenue. The agency aims to process applications within 60 days and can deny one if your business does not actually involve reselling, if the application contains a material misstatement, or if denial would protect the state’s tax collection interest.6Washington State Legislature. RCW 82.32.780 – Resellers Permit, Taxpayer Application Permits can also be revoked when a buyer uses one to avoid tax on items actually consumed in the business.
Misuse carries a 50% surcharge on the unpaid tax, even without intent to defraud.1Washington Department of Revenue. Use Tax Buying a laptop “for resale” and then putting it on your own desk is exactly the kind of thing auditors look for.
Groceries and Other Exempt Food
Most grocery items are exempt. The statute defines “food and food ingredients” broadly as substances sold for human consumption in any form, whether solid, liquid, frozen, or dried.7Washington State Legislature. RCW 82.08.0293 – Exemptions, Sales of Food and Food Ingredients Produce, meat, dairy, flour, and similar staples qualify.
Several categories do not:
- Prepared food: heated meals, deli items sold with utensils, and ready-to-eat food.
- Soft drinks and bottled water.
- Dietary supplements, including vitamins and protein powders.
- Alcohol and tobacco, which also carry their own excise taxes.
- Cannabis products, which the statute explicitly excludes.
Prescription Drugs and Medical Devices
Prescription drugs dispensed to patients are exempt, including drugs used for family planning. Family planning clinics under contract with the Department of Health can supply these products tax-free even without an individual prescription.8Washington State Legislature. RCW 82.08.0281 – Exemptions, Drugs Prescribed for Human Use
Prosthetic devices are exempt when prescribed, fitted, or furnished by a licensed professional, and the definition covers replacement and corrective devices worn on or in the body, including repair and replacement parts.9Washington State Legislature. RCW 82.08.0283 – Exemptions, Prosthetic Devices Medically prescribed oxygen systems and durable medical equipment for home use are exempt under separate provisions.10Cornell Law Institute. Washington Administrative Code 458-20-18801 – Medical Substances, Devices, and Supplies for Humans
Over-the-counter medications are not exempt. The dividing line is the prescription. If a licensed provider prescribed the item for you, it qualifies; if you picked it off a shelf, it does not.
Manufacturing and Farm Equipment
Machinery and equipment used directly in manufacturing, research and development, or testing are exempt when purchased by a manufacturer or processor for hire. The exemption extends to installation, repair, and maintenance services for that equipment.11Washington State Legislature. RCW 82.08.02565 – Exemptions, Machinery and Equipment Used in Manufacturing The word “directly” is doing real work. Office furniture at the plant and break room appliances do not qualify. The equipment has to be part of the actual production process.
Eligible farmers get a parallel break. Replacement parts for qualifying farm machinery, and the labor to install or repair those parts, are exempt.12Washington State Legislature. RCW 82.08.855 – Exemptions, Farm Machinery and Equipment Both exemptions require the buyer to hand the seller a completed exemption certificate at the time of sale.
Trade-Ins
When you trade property as part of a purchase, Washington reduces the taxable price by the value of the trade-in, as long as the items are “like kind.” Trade in a car toward a new car and you pay sales tax only on the difference. Trade in two vehicles toward one, and both values reduce the taxable amount.13Washington State Legislature. WAC 458-20-247 – Trade-Ins
“Like kind” means the general class of property: furniture for furniture, motor vehicles for motor vehicles, appliances for appliances. You cannot trade a boat to reduce the taxable price of a car. The trade also has to be delivered as part of the same transaction; buying on Monday and dropping off your old item Friday does not qualify.13Washington State Legislature. WAC 458-20-247 – Trade-Ins
Goods Delivered Out of State
Goods sold in Washington but delivered to a customer outside the state are not subject to Washington sales tax, whether the seller ships by carrier or delivers directly to an out-of-state location.14Washington Department of Revenue. Sales Tax Exemption for Nonresidents Sellers claim these on their returns under the interstate and foreign sales deduction. The buyer may still owe tax in the destination state.
How to Claim an Exemption
Most exemptions have to be claimed at the register with paperwork. The main form is the Department of Revenue’s Buyer’s Retail Sales Tax Exemption Certificate (Form REV 27 0032), available on the department’s website.15Washington Department of Revenue. Exemption Forms For purchases that cross state lines, the Streamlined Sales Tax Certificate of Exemption works across all 24 member states of the Streamlined Sales Tax agreement.16Streamlined Sales Tax Governing Board. Exemptions
Each certificate asks for your Unified Business Identifier (UBI) number, the nine-digit number assigned when you register your business with the state, along with a description of the business and the specific reason for the exemption, such as resale, manufacturing, or government use.17Washington Department of Revenue. Business Licensing and Renewals FAQs An authorized representative has to sign it.
Blanket Certificates
If you buy regularly from the same vendor, you do not need a new certificate every time. A blanket exemption certificate covers all qualifying purchases from one seller on an ongoing basis. Vendors commonly ask you to refresh it every few years, often on a four-year cycle, and a certificate is generally treated as current as long as no more than a year passes between purchases from that vendor.
The Use Tax Backstop
Every exemption discussion in Washington carries a warning: if you acquire goods or services without paying sales tax, you likely owe use tax instead. The use tax rate equals the combined state and local sales tax rate where you first use the item. Common triggers include online purchases from out-of-state sellers that did not collect Washington tax, items bought on a reseller permit that you ended up using in your own business, and personal property acquired as part of a real estate deal.1Washington Department of Revenue. Use Tax
Businesses report use tax on their regular excise tax returns. Individuals can file through the Department of Revenue’s My DOR portal or by mailing a Consumer Use Tax Return. A legitimate exemption clears both taxes. Skipping sales tax when you were not actually entitled to an exemption only shifts the bill to use tax, and the state does catch up.
Getting a Refund If You Already Paid
If you paid sales tax on something that should have been exempt, start with the seller. A direct refund from the seller is the fastest route; the seller adjusts its tax filing and returns the money without involving the state.
When the seller cannot or will not help, you can apply directly to the Department of Revenue. The department accepts refund applications when the seller is out of business, cannot be located, is financially unable to issue the refund, or refuses to refund tax it agrees was collected in error.18Washington Department of Revenue. Consumers – Apply for a Sales Tax Refund You will need a completed Buyer’s Declaration (Form REV 41 0104), proof of payment, and an explanation of why the purchase qualified.19Washington State Department of Revenue. Buyers Declaration for Refund of Retail Sales Tax
Washington generally limits refund requests to four years from the close of the tax year in which you paid. Miss that window and the money stays with the state.