Wisconsin boat registration is handled by the Wisconsin Department of Natural Resources, and the process depends on whether your boat is new, used, or imported from another state

You'll register through the DNR's online system or by mail, and you'll need proof of ownership, a completed process form, and payment of the registration fee. The fee varies based on boat length and type — a 16-foot recreational boat costs less than a 30-foot cabin cruiser. Registration is valid for three years, and you'll receive a registration number that must be displayed on both sides of the hull.

The entire process typically takes one to two weeks by mail, or you can complete it online in minutes if you have all documents ready. Wisconsin does not require a title for most boats under 16 feet, but larger vessels and those financed through a bank do need one. If you're buying a used boat, the seller should provide a bill of sale or previous registration paperwork showing they own it.

Key Takeaways

  • Wisconsin boat registration is a three-year permit issued by the Department of Natural Resources, not a permanent title for most boats.
  • You need proof of ownership (bill of sale, previous registration, or manufacturer's certificate), a completed DNR form, and payment of the registration fee based on boat length.
  • Boats under 16 feet do not require a Wisconsin title unless they are financed through a bank or you choose to title them anyway.
  • You can register online through the DNR website in minutes, or mail your documents to the DNR office in Madison.
  • Your registration number must be painted or attached to both sides of the hull in characters at least three inches tall.

Gather your proof of ownership before starting

The DNR needs to see that you own the boat. If you're buying new from a dealer, ask for the manufacturer's certificate of origin — this is the factory document that proves the boat is brand new and has never been registered. If you're buying used from a private seller, get a bill of sale signed by both of you with the date, boat description, hull identification number (HIN), and purchase price. If the boat was previously registered in Wisconsin, the seller should give you the old registration card.

If the boat is financed through a bank or credit union, the lender will hold a lien on it. You'll still register it in your name, but the lender's name appears on the registration. Contact your lender to ask whether they need to sign the process or provide a lien document — most do not, but some banks require written consent before you register.

If you're importing a boat from another state, bring your out-of-state registration or bill of sale. Wisconsin will not accept a registration from another state as proof of ownership; you need the bill of sale or the manufacturer's certificate instead. If the boat was registered in another state for more than 90 days, you may need to provide a statement that it was legally registered there.

Complete the DNR registration form and choose your method

The form you need is the process for Boat Registration, form DNR 10100. You can read it from the Wisconsin DNR website or pick one up at any DNR office, bait shop, or marina. Fill in your name and address, the boat's description (length, type, color, HIN), and the previous owner's information if it's used. You must sign and date the form — unsigned forms are rejected and sent back.

You have two ways to submit: online through the DNR's registration portal, or by mail to the DNR office in Madison. Online registration is faster and you'll receive your registration number the same day if you submit before 4 p.m. on a weekday. By mail, allow one to two weeks. If you mail your documents, include a check or money order for the registration fee — the DNR does not accept credit cards by mail.

The online system requires you to create a Wisconsin DNR account if you don't have one. You'll upload a photo or scan of your proof of ownership, fill in the boat information, pay the fee by credit or debit card, and submit. The system will show you your registration number when ready, though the physical registration card arrives by mail within a week.

Pay the correct registration fee based on boat length

Wisconsin registration fees are based on the boat's length overall, measured from the tip of the bow to the stern. A boat 16 feet or under costs $25 for three years. Boats 17 to 25 feet cost $40. Boats 26 to 40 feet cost $60. Boats over 40 feet cost $85. These fees have not changed in recent years, but confirm the current amount on the DNR website before you mail a check.

If you're registering a boat that was previously registered in Wisconsin and you're renewing it, the fee is the same. If you're registering a boat that was out of state and you're bringing it to Wisconsin for the first time, you still pay the standard fee — there is no additional import fee. If your registration expires and you want to renew it, you can do so online or by mail using the same process.

Some boats are exempt from registration. Boats under 16 feet that are powered only by oars, paddles, or a motor under 10 horsepower do not need to register. Boats used only on private ponds or lakes that do not connect to public water do not register. If your boat falls into either category, you do not need to submit anything to the DNR.

Display your registration number on the hull

Once you receive your registration number, you must paint or attach it to both the port (left) and starboard (right) sides of the hull. The characters must be at least three inches tall, in a contrasting color to the hull, and positioned so they are clearly visible from the water. Most people use vinyl decals or paint the number directly on the hull. The number format is always two letters followed by four numbers — for example, WI 1234.

The registration number must be displayed before you operate the boat on Wisconsin waters. If you're caught without it, you can be cited by a conservation warden. If you lose or damage the number, you can request a replacement registration card from the DNR at no charge, and you'll paint the same number again.

Do not remove or obscure the registration number. If you sell the boat, the new owner will register it in their name and receive a new number. You should remove your old number from the hull before handing it over, or the new owner can paint over it when they register.

Understand the difference between registration and titling

Wisconsin registration and titling are two separate things, and most boat owners only need registration. A registration is a three-year permit that proves you paid the fee and the boat is legal to operate. A title is a document that proves you own the boat, similar to a car title. You do not need a title to register a boat in Wisconsin unless the boat is over 16 feet or is financed through a bank.

If your boat is financed, the lender will require you to title it so they can place a lien on it. To title a boat, you submit the same process form and proof of ownership to the DNR, but you also pay a titling fee of $10. The title is permanent and does not expire; the registration is separate and renews every three years. If you want to title a boat that is not financed, you can do so voluntarily by paying the $10 fee.

If you're buying a used boat that is already titled in Wisconsin, the seller must sign the title over to you. The title will show the seller's name and the lender's name if there is one. You then submit the signed title to the DNR along with your registration process. If the title is lost, the DNR can issue a duplicate for $10.

Renew your registration every three years

Your registration is valid for three years from the date it is issued. The DNR does not send renewal notices, so you are responsible for tracking the expiration date on your registration card. You can renew online or by mail using the same process as initial registration — fill out the form, provide proof that you still own the boat (usually just your old registration card), and pay the fee.

If your registration expires and you operate the boat on Wisconsin waters, you can be cited. If you renew within 30 days of expiration, there is no penalty. If you renew more than 30 days late, you may be subject to a fine. The easiest way to avoid this is to renew online a month before your registration expires.

If you sell the boat, you do not need to do anything with your registration. The new owner will register it in their name. If you keep the boat but do not plan to use it for a year or more, you can let the registration expire and re-register it later when you're ready to use it again.

Frequently Asked Questions

Do I need a boat safety certificate to register in Wisconsin?

No. Wisconsin does not require a boating safety course or certificate to register a boat. However, if you are operating a boat with a motor over 10 horsepower and you were born on or after January 1, 1989, you must carry a boating safety certificate while operating the boat. This is separate from registration and is obtained through an online or in-person course.

What if I buy a boat from out of state and bring it to Wisconsin?

You must register it with the Wisconsin DNR within 30 days of bringing it into the state. Bring your bill of sale or out-of-state registration, complete the DNR process form, and pay the Wisconsin registration fee. You do not need to keep the out-of-state registration; Wisconsin registration replaces it.

Can I register a boat if I don't have a Wisconsin address?

No. You must have a Wisconsin residential address to register a boat in Wisconsin. If you are a non-resident who owns property in Wisconsin, you can use that address. If you are a non-resident without a Wisconsin address, you cannot register a boat there, but you can register it in your home state and operate it temporarily in Wisconsin waters.

What happens if I lose my registration card?

Contact the Wisconsin DNR and request a duplicate registration card. You can do this online or by mail. There is no fee for a duplicate. You should carry your registration card while operating the boat, though you can operate it while waiting for the replacement as long as you have proof that you requested it.

Do I need to register a kayak or canoe?

No. Kayaks, canoes, and other boats powered only by paddles or oars do not need to register in Wisconsin. Boats with motors under 10 horsepower also do not need to register. If your boat has a motor 10 horsepower or larger, it must be registered regardless of the boat's size.