Maine boat registration basics

Maine requires you to register any motorboat, sailboat, or personal watercraft you operate on state waters. The registration is handled by the Maine Department of Inland Fisheries and Wildlife (IF&W), not the Bureau of Motor Vehicles. You'll need the boat's hull identification number (HIN), proof of ownership, and a completed process form. Registration takes about two weeks by mail and costs between $25 and $100 depending on the boat's length and type.

Unlike vehicle registration, Maine boat registration does not renew annually. Once issued, your registration remains valid as long as you own the boat and it stays in Maine. If you sell the boat or move it out of state, you'll need to notify IF&W or transfer the registration to the new owner.

Key Takeaways

  • Maine boat registration is issued by the Department of Inland Fisheries and Wildlife, not the motor vehicle bureau, and does not expire.
  • You must provide the boat's hull identification number (HIN), proof of ownership such as a bill of sale or title, and a completed process form.
  • Registration costs between $25 and $100 depending on whether the boat is motorized and its overall length.
  • You can register by mail, in person at any IF&W regional office, or online through the Maine Bureau of Motor Vehicles website for certain boat types.
  • Once registered, your boat remains registered until you sell it, transfer ownership, or move it permanently out of state.

What documents you need to register

Start by gathering proof of ownership. This can be a bill of sale, a manufacturer's certificate of origin, a previous registration from another state, or a title document if the boat has one. Maine does not issue titles for most boats under 20 feet, so a bill of sale is usually sufficient. Make sure the document shows the seller's name, the buyer's name (you), the boat's description, the HIN, and the date of sale.

You'll also need the boat's hull identification number, which is a 12-character code stamped or engraved on the hull, usually near the starboard (right) side of the transom. If you cannot locate the HIN, contact the boat's manufacturer or the previous owner. Finally, complete the process form — Maine uses Form 280 for motorboats and Form 281 for sailboats and personal watercraft. Both forms are available on the IF&W website or at any regional office.

Registration costs and boat categories

Maine charges different registration fees based on boat type and length. A motorboat under 20 feet costs $25; one 20 to 40 feet costs $50; and one over 40 feet costs $100. Sailboats and personal watercraft have their own fee schedules, typically ranging from $25 to $75. If you register a boat partway through the year, you still pay the full fee — Maine does not prorate.

The fee covers the registration decal, which you must display on the boat. The decal is a numbered sticker that proves your registration is current. You'll receive it by mail after your process is processed, or when ready if you register in person at an IF&W office.

How to register by mail or in person

To register by mail, complete the appropriate process form (Form 280 or 281), include a copy of your proof of ownership, and send both to the Department of Inland Fisheries and Wildlife, Registration Section, 41 State House Station, Augusta, ME 04333. Include a check or money order for the registration fee. Processing takes about two weeks. You can track your process by calling the IF&W registration line at 207-287-8000.

To register in person, visit any of Maine's seven IF&W regional offices with your completed form, proof of ownership, and payment. The offices are located in Bangor, Gray, Greenville, Houlton, Rangeley, and two in Augusta. In-person registration is processed when ready, and you'll receive your decal on the spot. No appointment is needed.

Online registration through the Bureau of Motor Vehicles

Maine's Bureau of Motor Vehicles website offers online boat registration for certain vessels. You can register online if the boat is already registered in Maine and you are renewing, or if you are registering a new boat and have all required documents in digital form. Visit the BMV website, select "Boat Registration," and follow the prompts to upload your proof of ownership and complete the process.

Online registration costs the same as mail or in-person registration and is processed within a few business days. You'll receive your decal by mail. Not all boat types are available for online registration — if your boat does not appear in the online system, use the mail or in-person method instead.

What happens after registration and transferring ownership

Once your registration is approved, you'll receive a decal and a registration certificate. Display the decal on the boat's hull in a visible location — typically on the side of the bow or transom. Keep the registration certificate on board whenever you operate the boat. Maine law enforcement and IF&W officers may ask to see it during a routine stop.

If you sell the boat, the new owner must register it in their name. Provide them with a bill of sale showing the sale date, the boat's HIN, and both your names. The new owner then submits their own process with that bill of sale as proof of ownership. If you move the boat out of Maine permanently, contact IF&W to cancel the registration and avoid renewal fees if Maine ever implements them in the future.

Frequently Asked Questions

Do I need to register a sailboat with no motor?

Yes, Maine requires registration for all sailboats, whether motorized or not. Use Form 281 and pay the sailboat fee, which is typically $25 to $50 depending on length. The only exception is a sailboat under 12 feet with no motor, which may be exempt — contact IF&W to confirm your boat's status.

What if my boat doesn't have a hull identification number?

Older boats, especially those built before 1972, may not have a HIN. Contact the boat's manufacturer if you know it, or reach out to IF&W at 207-287-8000. They can help you locate the HIN or, in rare cases, issue a registration number if the HIN cannot be found.

Can I register a boat I'm buying from a private seller without a bill of sale?

A bill of sale is the standard proof of ownership and is strongly recommended. If you do not have one, ask the seller to sign a straightforward written agreement showing the boat's description, HIN, sale price, and both names. IF&W may request additional documentation if the proof of ownership is unclear.

How long does boat registration take if I explore by mail?

Mail registration typically takes two to three weeks from the date IF&W receives your process. Processing time can vary during busy seasons. If you need the registration sooner, visit an IF&W regional office in person for same-day processing.

Do I need to renew my boat registration every year?

No. Maine boat registration does not expire and does not require annual renewal. Your registration remains valid for as long as you own the boat and operate it in Maine. You only need to register again if you sell the boat or transfer ownership to someone else.