Wisconsin boat registration is handled by the Wisconsin Department of Natural Resources, and the process depends on whether your boat has a motor and how powerful it is

Most boats in Wisconsin need to be registered before you can legally operate them on state waters. The Wisconsin Department of Natural Resources (DNR) issues registrations, which are valid for three years. Non-motorized boats like canoes and kayaks do not need registration. Motorized boats — including those with electric motors — must be registered unless they are very small or used only on private property.

The registration process itself is straightforward: you fill out a form, provide proof of ownership, pay a fee, and receive a certificate and decals. You can complete the entire process online, by mail, or in person at a DNR office or authorized agent. Most people finish in one visit or within a week by mail.

Key Takeaways

  • Motorized boats must be registered with the Wisconsin DNR before operating on public waters, but non-motorized boats like canoes do not.
  • Registration costs between $25 and $100 depending on your boat's length and motor type, and the certificate is valid for three years.
  • You will need proof of ownership (bill of sale, manufacturer's certificate, or previous registration) and the boat's hull identification number (HIN).
  • You can register online through the Wisconsin DNR website, by mail, or at any DNR office or authorized agent like a bait shop or marina.
  • Once registered, you must display the registration decals on both sides of the boat's hull near the stern, or face a fine.

What boats need to be registered in Wisconsin

Any boat with a motor — gasoline, diesel, or electric — must be registered. This includes jet skis, pontoons, fishing boats, and sailboats with auxiliary motors. The only motorized boats exempt from registration are those with motors smaller than 10 horsepower that are used only on private property (like a pond on your land).

Non-motorized boats do not need registration. Canoes, kayaks, rowboats, and sailboats without motors can be used on Wisconsin waters without any DNR registration. However, you still need to follow all other boating laws, including wearing a life jacket if required by federal law.

If you own a boat registered in another state and bring it to Wisconsin temporarily, you do not need to re-register it when ready. However, if you keep it in Wisconsin for more than 90 days, you must register it with the Wisconsin DNR.

Documents and information you will need to register

Before you start the registration process, gather these items: proof of ownership (a bill of sale, manufacturer's certificate of origin, or your previous boat registration from another state), the boat's hull identification number (HIN), and your Wisconsin driver's license or ID. The HIN is a unique 12-character code stamped into the hull, usually on the starboard (right) side near the stern, or on the transom. If you cannot find it, the DNR can help you locate it.

You will also need to know your boat's length (measured in feet from the tip of the bow to the end of the stern), the type of motor (gasoline, diesel, electric, or other), and the motor's horsepower. If you do not have the original bill of sale, a notarized statement from the previous owner or a mechanic's inspection can serve as proof of ownership.

If someone else owns the boat but you are registering it on their behalf, bring a signed power of attorney or a letter from the owner authorizing you to register it. The owner's name will appear on the certificate, not yours.

Registration fees and how long the certificate lasts

Wisconsin boat registration fees are based on the boat's length and motor type. Boats under 16 feet cost $25 for three years. Boats 16 to 26 feet cost $40. Boats over 26 feet cost $60. Sailboats with auxiliary motors and jet skis have their own fee schedules. If you register a boat partway through the year, you still pay the full three-year fee — there is no prorated option.

Your registration certificate is valid for three years from the date of issue. You will receive a renewal notice by mail about 30 days before expiration. You can renew online, by mail, or in person. Renewal costs the same as initial registration.

If your boat is financed, the lender may require you to show proof of registration before releasing the loan. Some marinas and boat dealers will handle registration for you as part of the purchase, though they may charge a small fee for the service.

How to register online, by mail, or in person

Online registration is the fastest option. Go to the Wisconsin DNR website, find the boat registration section, and fill out the form with your boat and ownership information. You will need to upload a photo of your proof of ownership and pay the fee by credit card or debit card. You will receive your certificate and decal instructions by email within a few business days.

Mail registration takes longer but works if you prefer not to go online. read the boat registration form from the DNR website, fill it out completely, and mail it with a copy of your proof of ownership and a check or money order to the address on the form. Processing takes 7 to 10 business days. Include a self-addressed stamped envelope if you want your certificate returned by mail.

In-person registration at a DNR office or authorized agent is the most when ready option. You can walk in with your documents and proof of ownership, complete the form on the spot, pay the fee, and leave with your certificate and decals the same day. DNR offices are located in Madison and several regional locations. Authorized agents include many bait and tackle shops, marinas, and sporting goods stores — call ahead to confirm they offer registration services.

Displaying your registration decals and renewing your certificate

Once you receive your registration, you will get two decals — one for each side of the boat. These must be displayed on the hull near the stern (the back of the boat), on the starboard (right) side and port (left) side. The decals should be placed so they are clearly visible from the water. Do not cover them with paint or stickers, and do not remove them when you sell the boat — they stay with the registration certificate.

If your decals are damaged, faded, or missing, you can request replacements from the DNR at no extra cost. Operating a boat without visible registration decals is illegal and can result in a fine of up to $500.

Renewing your registration is simpler than the initial process. The DNR will mail you a renewal notice 30 days before your certificate expires. You can renew online, by mail, or in person using the same methods as initial registration. You do not need to provide proof of ownership again unless the boat has changed hands.

What happens if you sell or buy a used boat

If you buy a used boat that is already registered in Wisconsin, the seller should transfer the registration to you. The seller completes a transfer form and gives it to you along with the certificate. You then submit the transfer form, proof of the sale (bill of sale), and the original certificate to the DNR. The new registration will be issued in your name.

If you buy a boat from out of state, you will need to register it as a new boat in Wisconsin using the out-of-state registration or bill of sale as proof of ownership. If you sell your boat, notify the DNR in writing and include the certificate. This removes your liability if the new owner operates the boat illegally.

If a boat is financed, the lender's name may appear on the registration as a lienholder. When you pay off the loan, ask the lender for a release document, then submit it to the DNR to remove their name from the certificate.

Frequently Asked Questions

Do I need to register a kayak or canoe?

No. Non-motorized boats like kayaks, canoes, and rowboats do not need Wisconsin DNR registration. However, you must still follow all boating safety laws, including wearing a life jacket if required.

Can I register a boat online if I do not have a digital copy of my proof of ownership?

You will need to upload a photo or scan of your proof of ownership to complete online registration. If you do not have a digital copy, you can register by mail or in person instead. You can also take a photo of your document with a smartphone and upload it.

What if my boat does not have a visible hull identification number?

Contact the Wisconsin DNR before you register. They can help you locate the HIN or, in rare cases, issue a temporary number. Bring the boat to a DNR office or authorized agent if needed. Do not register without a HIN — it is required for the certificate.

How much does it cost to register a 20-foot boat?

A boat between 16 and 26 feet costs $40 for a three-year registration. This is a flat fee regardless of when during the year you register. Renewal also costs $40 every three years.

Can I register a boat that is not yet paid off?

Yes. If the boat is financed, the lender may require you to show proof of registration. The lender's name will appear on the certificate as a lienholder, but you can still register and use the boat. Once you pay off the loan, ask the lender for a release and submit it to the DNR to remove their name.