A Kansas boat bill of sale is the document that records a private watercraft sale and gives the new owner what they need to pay sales tax and register the vessel with the Kansas Department of Wildlife and Parks (KDWP). It should name the buyer and seller, state the purchase price and date of sale, and fully describe the boat, including its Hull Identification Number. Because Kansas does not issue titles for watercraft, this piece of paper is your primary proof of ownership — keep it permanently.
What the Bill of Sale Must Include
For KDWP to accept your registration packet, the bill of sale needs to cover a few specifics. Include the full legal names and addresses of both parties, the agreed purchase price, and the date money changed hands. The price is not a formality: the county treasurer uses it to calculate the sales tax you owe before the state will process registration.
The vessel description has to be thorough. List the make, model, and year, and copy down the Hull Identification Number (HIN) exactly. The HIN is a 12-character code — a mix of letters and numbers, not just digits — permanently affixed to the rear of the transom, usually in the upper right corner. Federal rules require it on every boat manufactured after November 1, 1972.
KDWP publishes a standard bill of sale form on its website, and using it keeps the processing clerk’s job simple. A generic form is acceptable as long as it captures the same information. For an older boat built before November 1972 with no HIN at all, KDWP will assign one during registration.
One practical check before you pay: KDWP asks new owners to submit a printed photo or pencil tracing of the HIN with the registration packet. Walk back to the transom and compare the plate against what the seller wrote on the bill of sale. A mismatch will stall your registration.
Kansas Does Not Title Watercraft
This is the single biggest misconception in Kansas boat transactions. The state does not issue titles for watercraft, and it does not title outboard motors either. The bill of sale, combined with the previous owner’s certificate of number, is what establishes your ownership. There is no title to sign over, no title assignment to complete, and no title transfer fee.
Because there is no title, notarization is also unnecessary. KDWP explicitly states it does not require the bill of sale to be notarized. If a seller insists on notarizing anyway, nothing is harmed, but Kansas law doesn’t demand it.
If the boat came from a state that does issue titles, that out-of-state title can serve as supporting documentation for your Kansas registration. Kansas itself will issue only a certificate of number. That is why holding onto the bill of sale matters so much: without a title system behind you, it is the only document proving you paid for the boat and that the previous owner agreed to sell it.
Paying Sales Tax at the County Treasurer
Kansas charges sales tax on private boat purchases, and you must show proof of payment before KDWP will register the vessel. The statewide rate is 6.5%, with local jurisdictions adding their own rates on top. You pay the combined rate for the location where you keep the boat.
Take your bill of sale to the county treasurer’s office in the county where you plan to store the boat. The treasurer calculates tax owed from the purchase price shown on the document, collects it, and issues a sales tax paid receipt. That receipt goes into your KDWP packet.
A Kansas dealer usually collects sales tax at the point of sale and gives you a receipt (sometimes an STD8 form). If you bought from an out-of-state dealer and paid tax at a lower rate than Kansas charges, you may still owe the difference as compensating use tax, paid through the county treasurer or by filing a CT-10U Consumers’ Use Tax Return with the Kansas Department of Revenue.
Registering the Boat With KDWP
Any vessel powered by a motor (gasoline, diesel, or electric) or by sail must be registered with KDWP. Non-motorized boats like canoes, kayaks, and rowboats are exempt. A boat already registered in another state gets a 60-day grace period on Kansas waters, but a boat bought within Kansas must be registered before you operate it.
Registration costs a flat $42.50 and lasts three years. You can register online through the KDWP licensing portal at gooutdoorskansas.com, in person at a Kansas state park office, KDWP regional office, or authorized boat registration agent, or by mail using the Application for Certificate of Number Kansas Boating Act form sent with your paperwork and fee to the KDWP office in Pratt.
Your packet for a private-party purchase should include the bill of sale, the seller’s certificate of number if you received it, your sales tax paid receipt, a photo or pencil tracing of the HIN, and the $42.50 fee. KDWP will issue a certificate of number and validation decals.
Do not try to register the boat at the county treasurer’s office. The treasurer handles sales tax; KDWP handles registration. Running the two together is a common mistake that sends buyers back and forth.
What the Seller Has to Do
Sellers have their own duty tied to the sale. The person whose name appears on the existing certificate of number must notify KDWP in writing within 15 days of the transfer, giving the buyer’s name and address and the date of sale. Until that notice is filed, KDWP’s records still show the boat under the seller’s name, which can create liability if the new owner has an accident or violates boating laws.
Keeping a signed copy of the bill of sale protects the seller too. If anyone later disputes when ownership transferred, a document with a clear date and both signatures settles it. Sellers should also hand over their certificate of number, since KDWP may ask for it when the buyer registers.
The Trailer Is a Separate Transaction
Kansas skips boat titles, but it does not skip boat trailer titles. Trailers fall under the Kansas Division of Vehicles, not KDWP, and the rule depends on weight. A trailer with a combined weight (trailer plus load) over 2,000 pounds must be titled and registered through the Division of Vehicles at your county treasurer’s office. Trailers at or below 2,000 pounds can be titled at the owner’s option but are not required to be.
One boat purchase often means two parallel processes. Write a separate bill of sale for the trailer listing its make, year, and VIN. If the trailer has never been titled in Kansas and exceeds 2,000 pounds, the Division of Vehicles may require a Motor Vehicle Examination before issuing the title.