What you need to register a boat in Massachusetts

Massachusetts requires registration for any motorized boat or sailboat over 17 feet, plus any boat with a motor regardless of size. You register through your town or city harbormaster's office, not through a state central office. The harbormaster is your actual point of contact — they issue the registration certificate and hull number if you don't have one.

Registration is not the same as titling. Massachusetts issues a registration certificate, which proves you've paid the fee and met safety requirements. Some boats also need a title, depending on whether they're financed or mortgaged. If a lender holds a security interest in the boat, you'll need both registration and a title document filed with the state.

The process takes about one to two weeks once you submit everything to your harbormaster. You can renew by mail or in person the following year, and renewals typically take a few days.

Key Takeaways

  • Contact your town or city harbormaster's office directly — they handle boat registration, not the state Registry of Motor Vehicles.
  • You need proof of ownership (bill of sale, previous registration, or title), proof of residency, and a completed registration form from your harbormaster.
  • Motorized boats of any size and sailboats over 17 feet must be registered; sailboats 17 feet and under with no motor do not.
  • If your boat is financed, the lender will require both a registration certificate and a title with their name listed as lienholder.
  • Registration fees vary by town and by boat length; contact your harbormaster for the exact amount before you visit.

Documents you'll need to bring

Start with proof of ownership. If you're buying the boat, bring the bill of sale signed by the seller. If you already own it, bring your previous registration certificate or title. If the boat is new and has never been registered in Massachusetts, bring the manufacturer's certificate of origin or the dealer's paperwork.

You'll also need proof that you live in that town or city. A driver's license, utility bill, lease, or tax bill all work. Bring your Social Security number or federal tax ID number. If someone else owns the boat with you, bring their identification and Social Security number as well.

Your harbormaster will provide a registration process form — you can often read it from the town website beforehand and fill it out at home. The form asks for the boat's length, hull material, motor type, and where you plan to keep it. If the boat doesn't have a hull number, the harbormaster will assign one during registration.

Registration fees and what they cover

Fees vary significantly by town and by boat length. A 20-foot sailboat might cost $50 to $150 per year in one town and $200 to $300 in another. Motorized boats typically cost more. Contact your specific harbormaster's office for the exact fee — it's the only way to know before you go.

The registration fee covers your certificate and the administrative cost of maintaining the registry. It does not cover mooring fees, launch ramp fees, or any harbor services. Those are separate charges that your harbormaster can explain. Some towns charge a one-time hull number fee if the boat doesn't already have one; others include it in the registration fee.

If you register late — after the important date your town sets, usually in spring — you may pay a late fee on top of the standard registration cost. Renewal is cheaper than initial registration in some towns, so ask whether you're paying a new registration fee or a renewal fee.

Boats that need a title as well as registration

If your boat is financed through a bank or credit union, the lender will require a title document filed with the state. Massachusetts titles are issued by the Registry of Motor Vehicles, even though registration happens at the town level. This is the main exception to the "harbormaster handles everything" rule.

To get a title, you submit an process to the Registry of Motor Vehicles along with proof of ownership and proof of the lender's interest. Your harbormaster can tell you whether your boat needs a title based on how you're paying for it. If you're paying cash, you typically don't need a title — just the registration certificate.

The title process takes longer than registration, usually two to four weeks. If you're buying a financed boat, ask the seller or dealer whether they've already started the title process. Some dealers handle this step for you; others expect you to do it after purchase.

Renewing your registration each year

Renewal notices come from your harbormaster's office in the spring, usually a month or two before the important date. You can renew by mail by sending in the renewal form, proof of residency if you've moved, and a check. Mail-in renewals typically process within a few days.

You can also renew in person at the harbormaster's office. Bring the same documents you brought for initial registration — proof of residency and your current registration certificate. If the boat's information has changed (new motor, new length, new owner), tell the harbormaster before you renew.

If you miss the important date, contact your harbormaster about late renewal. Most towns allow a grace period, but you may owe a late fee. If your registration lapses and you operate the boat without renewing, you can be fined by the harbormaster or marine police.

Out-of-state boats and seasonal use

If you own a boat registered in another state and keep it in Massachusetts for more than 90 days in a calendar year, you must register it in Massachusetts. The 90-day rule applies whether the boat is in the water or stored on land. If you're only visiting for a few weeks each summer, you don't need to register.

Some towns offer seasonal registration for boats that are only used during summer months. The fee is lower than year-round registration, and you register for a specific period — typically May through September. Ask your harbormaster whether seasonal registration is an option and what the cost difference is.

If you're moving to Massachusetts with a boat registered elsewhere, you have 30 days to register it in your new town. Bring your out-of-state registration certificate along with your other documents. Your harbormaster will issue a new Massachusetts certificate and may assign a new hull number if the out-of-state number doesn't meet Massachusetts standards.

What happens if you don't register

Operating an unregistered boat in Massachusetts is a violation. The harbormaster or marine police can issue a citation, which carries a fine. The amount varies by town but typically ranges from $100 to $500 for a first offense. Repeat violations carry higher fines.

Beyond the fine, an unregistered boat can be impounded if it's found in a public mooring field or launch area. You'll have to pay impound fees and storage costs to get it back, on top of the registration fee and any fines. If you're buying a used boat, make sure the seller's registration is current and transferable to you before you take possession.

Frequently Asked Questions

Do I need to register a sailboat with no motor?

Only if it's over 17 feet long. Sailboats 17 feet and under with no motor do not need to be registered in Massachusetts. If you add a motor later, you must register it even if it's still under 17 feet.

Can I register a boat I'm buying if the seller hasn't transferred it yet?

No. You need proof of ownership — a bill of sale or title in your name — before the harbormaster will register it. Make sure the bill of sale is signed and dated by the seller. If the boat is titled, the title must show you as the new owner or have a signed transfer section.

What if I move to a different town in Massachusetts?

You must re-register with your new town's harbormaster. Bring your current registration certificate, proof of your new address, and the registration form from the new harbormaster's office. You'll pay a new registration fee; you don't transfer the old one.

How long does a registration certificate last?

One year from the date of issue. Your harbormaster will tell you the renewal important date for your town — it's usually in spring, but it varies. You'll receive a renewal notice in the mail before the important date.

Do I need insurance to register a boat in Massachusetts?

No. Boat insurance is not required by the state for registration. However, if your boat is financed, the lender will require you to carry insurance as a condition of the loan. Check your loan documents or ask your lender.