Illinois Boat Registration: Requirements, Fees, and Renewal

Illinois boat registration is handled by the Department of Natural Resources (DNR), and every motorized boat and every sailboat operated on Illinois waters must carry a valid certificate of number regardless of size. Non-powered craft like canoes, kayaks, and paddleboards are exempt. You register by sending the DNR a completed Watercraft Application with proof of ownership and a fee based on your boat’s length. Boats longer than 21 feet also need a separate certificate of title, and most purchases trigger a 6.25% watercraft use tax on top of the registration fee.

Which Boats Have to Be Registered

Under the Boat Registration and Safety Act (625 ILCS 45), every powered watercraft on Illinois waters must be registered, along with sailboats.¹ Non-powered vessels are not required to be registered.²

Section 3-12 of the Act also carves out several categories that do not need Illinois registration even if powered:

Boats owned by the United States or another state and used solely for official purposes.
Vessels used exclusively as a ship’s lifeboat.
Boats validly registered in another state that will not be on Illinois waters more than 60 consecutive days.
Vessels with a valid U.S. Coast Guard marine document, though if operated on Illinois waters more than 60 days in a calendar year they must comply with state registration rules.
Foreign vessels temporarily using Illinois waters.
Racing boats competing in a DNR-approved race or built solely for racing, with written DNR authorization for preparation.
Non-powered boats used on a private pond fully enclosed on the owner’s land (not club or association water).²

Titling Is a Separate Step

Registration and titling are two different things. Every vessel over 21 feet that has to be numbered also has to have a certificate of title from the DNR, and the DNR will not issue or renew a registration for such a boat until the title application has been filed.³ Coast Guard-documented vessels are exempt from titling.

If your boat is 21 feet or shorter, titling is optional. You can still apply for a title voluntarily to create an official ownership record, which makes future sales and financing easier. Choosing a voluntary title also means you must maintain a certificate of number.³

How to Apply

To register, submit a completed Watercraft Application to the DNR with proof of ownership and the appropriate fee. Which ownership document you need depends on where the boat came from:⁴

For a new boat, the original Manufacturer’s Statement of Origin (MSO), endorsed by the dealer.
For a boat coming from another state, the original out-of-state title (from titling states) or registration card (from non-titling states), plus a copy of the bill of sale or purchase agreement.
For a boat already registered in Illinois, the original Illinois watercraft title along with a bill of sale or purchase agreement.⁵

Once processed, the DNR sends you a certificate of number (your registration card) and a set of expiration decals. The decals change color each year so law enforcement can spot expired registrations.²

Registration Fees by Boat Length

Fees are based on vessel length, and initial registration or transfer costs slightly more than a straight renewal:⁶

Class 1, powered boats under 16 feet: $28 new or transfer, $18 renewal.
Class 2, 16 to under 26 feet: $60 new or transfer, $50 renewal.
Class 3, 26 to under 40 feet: $160 new or transfer, $150 renewal.
Class 4, 40 feet and over: $210 new or transfer, $200 renewal.

Duplicate decals, duplicate registration cards, and corrected titles each cost $7. A dealer or manufacturer title is $10.

The 6.25% Watercraft Use Tax

Beyond the DNR fee, Illinois imposes a 6.25% watercraft use tax on the purchase price of any boat acquired by purchase, gift, or transfer.⁷ The tax catches private sales, out-of-state purchases, and gifted boats that would otherwise escape sales tax.

You must file a return and pay within 30 days of the purchase date or the date the boat enters Illinois, whichever is later. The DNR will not issue a certificate of title until you show proof of payment. The tax does not apply if the boat was already subject to Illinois sales tax through a retail purchase, or if the buyer is a qualifying government agency or charitable organization.

Displaying the Number and Decals

Your assigned identification number must be painted on or firmly attached to both sides of the bow in block characters at least three inches tall. The characters have to contrast with their background, read left to right, and stay legible. Include a space or hyphen between the “IL” prefix, the number, and the trailing letters, and no other numbers may appear on the bow.²

If the hull design makes direct display impractical, mount the numbers on brackets or fixtures firmly attached to the forward half of the vessel. The registration decals go on each side of the bow next to the identification number. On Coast Guard-documented vessels, the decals go alongside the documented vessel name instead.

The pocket-sized registration card has to be on board and available for inspection whenever the boat is being operated. Operating without the card aboard is itself a violation of the Act.¹

When to Renew

Illinois registrations run about three years and expire on September 30 of the third year. All registrations become invalid after October 15 of the expiration year, so the grace window is short. You should renew between January 1 and September 30 of the expiration year to allow processing time.² Renewals can be done through the DNR’s online portal, which avoids mailed paperwork or in-person visits.⁸

Buying or Selling a Registered Boat

When a boat changes hands, both sides have a 15-day deadline. The seller must notify the DNR within 15 days that the vessel was sold or transferred and surrender the certificate of number with the notice, including a sworn statement identifying the buyer.²

The buyer has to apply to the DNR within the same 15 days for a transfer of the certificate of number, providing their name, address, and the boat’s existing number. The transfer fee matches the new-registration fee for the vessel’s class. If the boat requires a title, the buyer also has to apply for a title transfer and pay the watercraft use tax before the DNR will issue the new certificate.

Sellers who skip the notification step risk staying on record as the vessel’s owner, which can create liability problems if the boat is later involved in an accident or violation.

What Happens If You Don’t Register

Most violations of the Boat Registration and Safety Act are classified as petty offenses unless a specific section says otherwise.⁹ Operating an unregistered vessel, failing to display your number properly, or leaving the registration card ashore can each draw a fine. Falsifying any registration certificate, application, or required record is separately prohibited by the statute.

Beyond the fine, operating without registration means no official ownership record exists with the state, which complicates insurance claims, accident reports, and any future sale. Conservation officers patrol Illinois waterways and routinely check for valid numbers and decals, so being stopped while out of compliance is more likely than many boaters expect.

1
Justia Law. Illinois Code 625 ILCS 45 – Boat Registration and Safety Act, Article III
2
Illinois General Assembly. Illinois Compiled Statutes 625 ILCS 45 – Boat Registration and Safety Act
3
Illinois General Assembly. Illinois Compiled Statutes 625 ILCS 45 – Boat Registration and Safety Act, Article IIIA
4
Illinois Department of Natural Resources. Registering a New Boat in Illinois
5
Illinois Department of Natural Resources. Illinois Registered Watercraft
6
Illinois Department of Natural Resources. Transaction Fees
7
Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 158 – Watercraft Use Tax Law
8
Illinois Department of Natural Resources. How to Register or Renew Your Boat in Illinois
9
Legal Information Institute. Illinois Administrative Code Title 17, Section 2010.95 – Penalties for Convictions