To register a boat in RI, you file an application with the Rhode Island Department of Environmental Management (DEM), submit proof of ownership and a tracing of the Hull Identification Number, and pay a two-year fee based on the vessel’s length. Motorboats of any size and non-motorized vessels longer than 12 feet all need to be registered before they go on state waters.1Rhode Island Department of Environmental Management. Frequently Asked Questions: Boating Registration
Who Needs to Register
Every motorized vessel is covered, whether it runs on gasoline, diesel, electric, or is a personal watercraft like a jet ski. Non-motorized boats over 12 feet also need registration. Canoes and kayaks 12 feet or shorter are exempt, as are houseboats classified under R.I. Gen. Laws § 44-5-25.1.1Rhode Island Department of Environmental Management. Frequently Asked Questions: Boating Registration
A separate title is required for any vessel longer than 14 feet, motorized or not. That’s handled alongside registration but is a distinct document. More on titling below.
Documents to Gather
Every applicant needs a pencil tracing of the Hull Identification Number (HIN) so the DEM can verify the vessel meets U.S. Coast Guard standards. What else you bring depends on how you got the boat.1Rhode Island Department of Environmental Management. Frequently Asked Questions: Boating Registration
New Boat From a Dealer
Bring the bill of sale on dealer letterhead and the Manufacturer’s Statement of Origin (MSO), plus the HIN tracing.
Used Boat
You need a notarized bill of sale or gift statement from the seller and the title, signed and notarized by the seller. If the boat comes from a state that doesn’t issue titles, the seller’s most recent registration certificate works as proof of ownership.1Rhode Island Department of Environmental Management. Frequently Asked Questions: Boating Registration If the boat is over 14 feet, no title from the seller means no registration for you, so confirm this before you hand over money.
Homemade Boat
A boat you built yourself won’t have a manufacturer-assigned HIN. The DEM will issue one and tell you how to permanently attach it to the hull. You still complete the standard application and provide documentation showing you built or own the vessel.
Filling Out the Application
The Rhode Island Boat Registration Application is a PDF you can download from the DEM website or pick up in person.2Rhode Island Department of Environmental Management. Boating Registration It asks for your name, address, date of birth, phone, and email, then the boat’s make, model, color, year, length, and HIN. You’ll also select coded categories for vessel type, hull material, primary use, and propulsion, and enter engine details including manufacturer, horsepower, serial number, and fuel type.3Department of Environmental Management. Rhode Island Boat Registration Application
Everything on the form has to match what’s on the bill of sale and title. There’s a declaration under penalty of perjury at the bottom, and incomplete applications don’t get processed.
Measure the length carefully. Rhode Island defines overall length as the horizontal distance from the foremost part of the bow to the aftermost part of the stern, not counting bowsprits, outboard motor brackets, or similar attachments. Any fraction of a foot rounds up. A bad measurement puts you in the wrong fee tier.4Rhode Island General Assembly. Rhode Island General Laws Title 46 Chapter 46-22 Section 46-22-4
What Registration Costs
Registration is biennial. The fee combines a statutory amount with an Environmental Assessment Fee (EAF), both set by length. The DEM’s schedule for 2026–2028 renewals:2Rhode Island Department of Environmental Management. Boating Registration
- Under 15 feet: $32 statutory + $5 EAF
- 16–20 feet: $42 statutory + $5 EAF
- 21–25 feet: $66 statutory + $5 EAF
- 26–30 feet: $108 statutory + $6 EAF
- 31–35 feet: $212 statutory + $7 EAF
- 36–40 feet: $264 statutory + $9 EAF
- 41–45 feet: $316 statutory + $10 EAF
- 46–50 feet: $418 statutory + $12 EAF
- Over 50 feet: $620 statutory + $16 EAF
Titling a vessel over 14 feet adds a $25 fee, paid with the title application.1Rhode Island Department of Environmental Management. Frequently Asked Questions: Boating Registration
If you’re buying a boat that already has current Rhode Island registration, the new owner files a fresh application and pays a $10 administrative fee rather than the full biennial amount. A separate $6 transfer fee applies only in the narrow case of moving a registration number between two historic vessels (both over 50 years old) owned by the same person.4Rhode Island General Assembly. Rhode Island General Laws Title 46 Chapter 46-22 Section 46-22-4
Where and How to Submit
Bring or mail your application, supporting documents, and payment to the DEM Office of Boat Registration and Licensing at 235 Promenade Street, Providence, RI 02908. Walk-in hours are weekdays, 8:30 AM to 3:30 PM.2Rhode Island Department of Environmental Management. Boating Registration
The office takes checks, money orders, and credit or debit cards. Card payments have a separate processing fee.2Rhode Island Department of Environmental Management. Boating Registration In-person applications can often be processed the same day. Mailed applications take longer depending on volume.
First-time registrations have to go through the Providence office. The DEM needs to review original ownership documents and the HIN tracing, so online submission isn’t an option at this stage.
After You’re Registered
You’ll receive a registration card and two validation decals. The assigned registration number goes on both sides of the forward half of the vessel. The characters must be at least three inches tall, in a color that contrasts with the hull, and readable left to right from a distance. Place the validation decal within three inches to the right of the number on each side. Harbormasters and enforcement officers check for this during routine stops.
Titling: A Separate Document
Registration lets you operate on Rhode Island waters and expires every two years. A title establishes legal ownership and stays with the vessel through future sales. Any boat longer than 14 feet needs a Rhode Island title, motor or not. Vessels 14 feet or shorter and boats with U.S. Coast Guard documentation are exempt from the state titling requirement.1Rhode Island Department of Environmental Management. Frequently Asked Questions: Boating Registration
Renewing Later Online
Once you’ve been through the first registration, future renewals can be done through the Rhode Island Outdoors (RIO) online portal. Go to the RIO website, choose “Search by Customer Number,” and enter your nine-digit customer number along with your date of birth and zip code.5Rhode Island Outdoors. RIO – Rhode Island Outdoors – Home Don’t use the Social Security number lookup for registration renewals. The DEM application form also points to online renewal at dem.ri.gov/boatreg.3Department of Environmental Management. Rhode Island Boat Registration Application Online transactions carry a convenience fee.