Overview
Boats register through the Department of Licensing - the same county auditor and subagent offices that handle car tabs, not Fish & Wildlife. Registration is required for any motorized vessel (a kayak with a trolling motor counts) and for sailboats 16 feet or longer; human-powered craft are exempt. Buying is a separate event from renewing: a purchase owes use tax at your address's combined rate on the price or fair market value, plus title transfer paperwork - and from July 1, 2026 the state layers a new recreational vessel tax on top for affected boats.
01 - Official fees
Washington boat registration fees at a glance
| Fee | Amount | Notes |
|---|---|---|
| Vessel registration fee | $10.50 | RCW 88.02.640, annual |
| Derelict vessel + invasive species fees | $6.00 | $5 combined fees + $1 surcharge |
| Filing fee | $6.00 | |
| Office service fee | $11.00 | varies slightly by office/online |
| Watercraft excise tax | 0.5% of FMV | annual, $5 minimum, due June 30 |
| Use tax (on purchase) | ≈ 8%–10.55% | combined rate at your address |
| Title transfer (new owner) | $5.00 | vessel title application fee, RCW 88.02.640 - plus office service/filing fees |
| Recreational vessel tax (from July 2026) | +0.5% | new 2025-package tax - see DOR notice |
Figures verified June 2026 against official sources (listed below). Always confirm the final amount with the Washington DOL (county auditor and subagent licensing offices) - counties can add small local fees.
02 - Step by step
How to register a boat in Washington
- 1
Confirm the vessel needs registration: any motorized boat, or a sailboat 16 feet or longer, used on Washington waters.
- 2
Bring the signed-over title (or manufacturer's certificate of origin for new boats) and bill of sale to any vehicle licensing office.
- 3
Pay use tax on the purchase price or fair market value at your local combined rate, plus title fees.
- 4
Pay the registration stack: $10.50 registration, ~$6 derelict/invasive-species fees, filing and service fees, and the year's watercraft excise tax.
- 5
Display the WN numbers and the decal on both sides of the bow; renew by June 30 every year.
03 - Same state, other costs
More Washington vehicle costs
04 - Common questions
Washington boat registration FAQ
How much does boat registration cost per year in Washington?
Around $33.50 in flat fees ($10.50 registration + $6 derelict/invasive fees + $17 filing and service) plus the watercraft excise tax at 0.5% of your boat's depreciated fair market value, minimum $5. A $20,000 boat renews for roughly $133.50; a $100,000 boat for about $533.50.
What is the watercraft excise tax?
An annual value tax on registered vessels - 0.5% of fair market value under chapter 82.49 RCW, with the value set by a state depreciation schedule rather than an appraisal, and a $5 floor. It's the boat equivalent of the RTA car-tab tax and appears on every renewal, not just at purchase.
Why does everyone renew by June 30?
Washington puts every vessel on the same registration year: July 1 through June 30. Register a new boat in April and you'll still renew that June - DOL doesn't prorate around your purchase anniversary. The upside is boating season starts with fresh decals statewide.
Do kayaks, canoes, or paddleboards need registration?
Not while human-powered - no registration and no excise tax, any length. Clamp even a small electric trolling motor on and the craft becomes a motorized vessel that must register. Sailboats register only at 16 feet and longer (or any length once a motor is aboard).
I'm buying a used boat from a private seller - what taxes hit?
Use tax at your address's combined rate (about 10.55% in Seattle, 8–9% in much of the state) on the price - or on fair market value if your price runs more than 20% below it, the same valuation rule Washington applies to cars. Then the annual excise starts with your first registration.
What's the new vessel tax starting July 2026?
The 2025 transportation revenue package added a recreational vessel tax effective July 1, 2026 - an additional excise layered on top of the existing 0.5% watercraft excise for covered recreational vessels. DOR published a special notice with the details; if you own a higher-value boat, read it before your 2026-27 renewal.
Does my boat trailer register separately?
Yes - the trailer is a vehicle with its own title and tabs through the regular vehicle side of DOL, including the trailer registration fee and its own use tax at purchase. Budget it separately from the boat when totaling a boat-and-trailer deal.
05 - Receipts
Official sources
Every number on this page comes from these documents - check them yourself.