Wisconsin boat registration is handled by the Wisconsin Department of Natural Resources, not your county clerk

Wisconsin requires all motorboats and sailboats over 20 feet long to be registered with the state. You register through the DNR's Bureau of Law Enforcement, not through your vehicle registration office. The process is separate from car registration, uses different forms, and the certificate you receive is not the same document as a vehicle title.

Registration costs depend on the boat's length and type. A motorboat under 16 feet costs less than a sailboat over 26 feet. The certificate is valid for three years, and you renew it by mail or online before it expires. You do not need to register boats under 20 feet unless they have a motor, though some smaller motorboats still require registration depending on horsepower.

Key Takeaways

  • Wisconsin requires registration for motorboats of any size and sailboats over 20 feet, handled by the DNR rather than your county.
  • You register online through the DNR website, by mail with form DNR 1300, or in person at a DNR service center.
  • Registration costs vary by boat length and type, and the certificate lasts three years before renewal is due.
  • You will need proof of ownership (bill of sale or title), the boat's hull identification number, and your Wisconsin driver's license or ID.
  • Renewal can be done online or by mail without returning to an office, as long as the boat's information has not changed.

What boats require registration in Wisconsin

Any motorboat, regardless of size, must be registered in Wisconsin. This includes jet skis, pontoons, fishing boats, and any vessel with an engine. Sailboats must be registered only if they are over 20 feet long. Boats under 20 feet with no motor do not require registration.

If you own a boat that was registered in another state and you are moving it to Wisconsin, you must register it with the DNR within 30 days of bringing it into the state. The same rule applies if you buy a boat from out of state. Failure to register within that window can result in a citation.

Documents and information you need to register

Before you start the registration process, gather your boat's hull identification number (HIN), which is usually found on the starboard (right) side of the boat near the stern. You will also need proof of ownership: either a bill of sale, a previous registration certificate, or a title if the boat came with one. Not all boats have titles in Wisconsin, but if yours does, bring it.

You will need a valid Wisconsin driver's license or state ID card. If you are registering the boat in a business name rather than your own, bring documentation showing your authority to register it on behalf of that business, such as articles of incorporation or a partnership agreement. Have your mailing address ready, as the certificate will be sent to the address you provide.

How to register online, by mail, or in person

Online registration is the fastest route. Go to the DNR's online registration system, enter your boat information and HIN, upload a photo of your proof of ownership, and pay the fee by credit or debit card. You will receive a temporary registration number when ready and the physical certificate by mail within two weeks.

Mail registration uses form DNR 1300, available on the DNR website. Fill it out completely, include a copy of your proof of ownership, and mail it with a check or money order to the address on the form. Processing takes three to four weeks. In-person registration is available at any DNR service center. Bring all documents listed above, and staff will process your registration on the spot. You pay by cash, check, or card, and you receive a temporary number when ready.

Registration fees and what they cover

Wisconsin boat registration fees are based on the boat's length. A motorboat under 16 feet costs one amount; a motorboat 16 to 26 feet costs more; a motorboat over 26 feet costs the most. Sailboats over 20 feet have their own fee structure, usually higher than motorboats of the same length. The DNR website has a fee calculator where you enter your boat's length and type to see the exact cost.

The registration fee covers three years of registration. You do not pay annually. When your certificate expires after three years, you renew it for another three-year period. If you sell the boat or it is destroyed, you can request a refund of the unused portion of your registration fee, though the process requires documentation of the sale or loss.

Renewing your Wisconsin boat registration

You can renew your registration online or by mail without visiting an office. The DNR will send you a renewal notice about 60 days before your certificate expires. You can renew online through the DNR website using your registration number and HIN, or by mail using the renewal form that comes with the notice. Online renewal is processed within days; mail renewal takes two to three weeks.

If your boat's information has not changed—same owner, same length, same type—renewal is straightforward. If you have made changes, such as adding a motor to a sailboat or changing the owner, you may need to re-register rather than renew. Contact the DNR to confirm whether your situation requires a new registration or a standard renewal.

What happens if you do not register or renew on time

Operating an unregistered boat in Wisconsin is a violation. Law enforcement can stop you on the water and issue a citation. The fine varies depending on whether you never registered the boat or straightforward let your registration expire. Expired registration is typically treated less severely than operating an unregistered boat, but both carry penalties.

If your registration has expired, renew it as soon as possible. You can renew online or by mail even after the expiration date. There is no grace period, so renew before the date on your certificate. If you are unsure whether your boat is registered or when it expires, contact the DNR directly with your boat's HIN or your registration number.

Frequently Asked Questions

Do I need a boat title in Wisconsin?

Not all boats require a title in Wisconsin. Motorboats do not automatically come with titles unless the manufacturer or previous owner obtained one. Sailboats over 20 feet may have titles depending on their age and origin. If your boat has a title, you should bring it when registering, but it is not required to complete registration. The DNR can tell you whether your specific boat should have a title.

Can I register a boat I do not own yet?

No, you must own the boat to register it. Registration requires proof of ownership, such as a bill of sale or title. If you are buying a boat, the seller should provide you with the necessary ownership documents. Once you have those documents and the boat is in your possession, you can register it within 30 days.

What if my boat's hull identification number is damaged or missing?

Contact the DNR before attempting to register. A missing or illegible HIN can complicate registration. The DNR may require an inspection or additional documentation to verify the boat's identity. In some cases, you may need to obtain a replacement HIN from the manufacturer or have the boat inspected by a DNR officer.

Can I transfer my boat registration to someone else?

No, registration is tied to the boat, not the owner. When you sell the boat, the new owner must register it in their name. You should notify the DNR of the sale so your name is removed from the registration. The new owner has 30 days to register the boat in Wisconsin if it is being kept in the state.

What if I register my boat in Wisconsin but keep it in another state?

If you are a Wisconsin resident and own a boat, Wisconsin requires you to register it with the state even if you keep it moored or stored out of state. However, if you are a non-resident who only occasionally brings a boat into Wisconsin waters, different rules may explore. Contact the DNR to discuss your specific situation before registering.