Maine trailer registration requires a bill of sale, proof of ownership, and a completed process sent to the Bureau of Motor Vehicles

Maine treats trailers as motor vehicles, so you register them through the same Bureau of Motor Vehicles (BMV) system you would use for a car or truck. The process is straightforward if you have the right documents, but the specific steps depend on whether your trailer is new, used, or being registered for the first time in Maine. You will need to submit paperwork by mail or in person at a BMV office, and registration fees vary based on the trailer's weight and type.

The timeline is typically two to three weeks if you submit everything correctly by mail. If you go in person to a BMV office, you can often complete registration the same day, though you will still wait for your registration certificate and plates to arrive by mail afterward.

Key Takeaways

  • You need a bill of sale, proof of ownership (title or manufacturer's certificate), and a completed process for Registration form from the Maine BMV.
  • Registration fees depend on your trailer's gross vehicle weight rating (GVWR), not its actual weight, and range from roughly $20 to $100 annually.
  • New trailers require a manufacturer's certificate of origin; used trailers require a title transferred to your name or a bill of sale if the previous owner never titled it.
  • You can submit your process by mail to the BMV or visit a regional office in person; mailed applications take two to three weeks, in-person visits are same-day.
  • Maine does not require a trailer inspection before registration, but your trailer must have working brakes and lights to be legal on the road.

Gather your ownership documents before you start

The first step is proving you own the trailer. If you bought it from a dealer or private seller, you should have received a bill of sale—a document signed by the seller stating the sale price, date, and both parties' names and addresses. If the trailer came with a title (a certificate of ownership issued by Maine or another state), you need that instead. If the previous owner never titled the trailer in Maine, a bill of sale is sufficient to register it for the first time.

If your trailer is brand new and came directly from the manufacturer, you will have a manufacturer's certificate of origin instead of a title. This document serves the same purpose and is issued by the trailer's builder. Keep the original or a certified copy—the BMV will not accept a photocopy of a title or certificate of origin unless it is certified by a notary.

If you are transferring a title from another state, contact that state's motor vehicle agency first to confirm the title is clear and in your name. Some states require you to surrender the old title before Maine will issue a new one.

Complete the Maine BMV process form

read the process for Registration of Motor Vehicle (Form 1-W) from the Maine BMV website or pick one up at any BMV office. Fill in your name, address, and driver's license number. Then enter the trailer's information: vehicle identification number (VIN), manufacturer, model year, and gross vehicle weight rating (GVWR). The GVWR is the maximum weight the trailer is designed to carry and is stamped on the trailer's frame or listed in the manufacturer's documentation—do not guess or use the actual weight, as the fee is based on GVWR.

Sign and date the form. If you are registering the trailer in a business name rather than your own, you will need to provide the business's federal employer identification number (EIN) or Social Security number, depending on the business structure. The form itself is straightforward and takes about five minutes to complete.

Calculate and pay the registration fee

Maine's trailer registration fee is based on the trailer's GVWR in 1,000-pound increments. A trailer with a GVWR of 1,000 to 2,000 pounds costs roughly $20 per year; a trailer rated 2,001 to 3,000 pounds costs roughly $30; and the fee increases by roughly $10 for each additional 1,000-pound bracket. Trailers over 10,000 pounds GVWR cost more, sometimes $100 or higher annually. These amounts can change year to year, so confirm the current fee schedule on the Maine BMV website before you send your payment.

You can pay by check, money order, or credit card. If you are submitting by mail, include a check or money order with your process. If you are registering in person at a BMV office, you can pay by any of these methods. Do not send cash through the mail.

Submit your process by mail or in person

You have two options for submission. By mail, send your completed process for Registration form, bill of sale or title, proof of ownership, and payment to the Maine Bureau of Motor Vehicles, 101 Hospital Street, Augusta, ME 04330. Include a cover letter with your name and phone number so the BMV can contact you if there are questions. Expect a response in two to three weeks; your registration certificate and plates will arrive separately by mail.

In person, visit any Maine BMV office during business hours. Bring the same documents and payment. The staff will review everything on the spot, process your registration, and issue you a temporary registration certificate valid for 30 days while your permanent certificate and plates are printed and mailed to you. This option is faster if you need to register the trailer quickly. Find the BMV office nearest you on the Maine Secretary of State website.

Understand Maine's trailer-specific rules and exemptions

Maine does not require a pre-registration inspection for trailers, unlike some states. However, your trailer must have working brakes if it weighs more than 3,000 pounds GVWR and working lights (tail lights, brake lights, and turn signals) regardless of weight. These are legal requirements for towing on Maine roads, and a law enforcement officer can cite you if they are not functional.

Trailers registered in Maine are valid for one year from the date of registration. You will renew annually by submitting a renewal form and payment to the BMV. If your trailer will sit unused for an extended period, you can request a non-operation status from the BMV, which suspends registration and fees until you notify them the trailer is back in use.

If you are towing a trailer registered in another state temporarily (for example, if you borrowed a trailer from out of state), you do not need to register it in Maine as long as it is registered in its home state and you are not using it for commercial purposes. However, if you keep it in Maine for more than 30 days, registration is required.

What to do if your trailer has no title or unclear ownership

If you bought a used trailer from a private seller and they never titled it in Maine, a bill of sale is enough to register it. The bill of sale must include the seller's printed name, signature, address, and the date of sale. If the seller is unavailable or unwilling to sign, you will need to contact the Maine BMV directly to discuss your options—some situations may require a notarized statement or a court process to establish ownership.

If the trailer came from out of state and has a title from another state, you will need to transfer that title to Maine. Submit the out-of-state title along with your Maine registration process. The BMV will issue you a Maine title once your registration is processed. If the out-of-state title is in someone else's name, you will need a bill of sale signed by that person or a court document showing ownership transfer to you.

Frequently Asked Questions

Do I need a Maine driver's license to register a trailer?

No, you do not need a driver's license to own or register a trailer. However, you do need a valid form of identification to prove who you are when you register. A passport, state ID card, or out-of-state driver's license will work if you do not have a Maine license yet.

Can I register a trailer online?

Maine does not offer online trailer registration through the BMV website. You must submit your process by mail or in person at a BMV office. Some third-party services offer to handle registration for a fee, but you can complete it yourself by following the steps above.

What if I lose my registration certificate or plates?

Contact the Maine BMV to request a duplicate. You will need to provide your trailer's VIN and pay a small replacement fee, typically around $5 to $10. Duplicates can be mailed to you or picked up in person at a BMV office.

How long do Maine trailer plates last?

Trailer plates are valid as long as your registration is current. When you renew your registration each year, your plates remain valid unless they are damaged or lost. You only need to request new plates if they are stolen, bent, or illegible.

Can I register a homemade or custom-built trailer?

Yes, but you will need documentation of the trailer's construction and specifications. Contact the Maine BMV before you build to understand what paperwork they will need. Typically, you will need a detailed description of the frame, axles, brakes, and GVWR, along with photos. The BMV may require an inspection to verify the trailer is safe before issuing registration.