What you need to register a boat in Michigan

Michigan requires you to register any boat with a motor, regardless of size, before you use it on state waters. You'll register through your county's marine contractor or the Michigan Department of Natural Resources, depending on which route you choose. The process takes about two weeks if you have all your documents ready, though it can be faster if you register online.

Registration costs vary by boat length and type. A motorboat under 26 feet costs less than one over 26 feet. You'll also pay a one-time $10 title fee if the boat has never been titled in Michigan. Once registered, your boat gets a registration number that you must display on both sides of the hull.

Key Takeaways

  • You must register any motorboat before launching it on Michigan waters, and registration is valid for three years.
  • You can register at your county marine contractor's office, through the Michigan DNR website, or by mail to the DNR's Watercraft Registration Unit.
  • You'll need proof of ownership (bill of sale or title), your driver's license or ID, and proof of address to complete registration.
  • Registration fees depend on your boat's length and horsepower, and a new title costs an additional $10 if the boat has never been titled in Michigan.
  • If you buy a used boat, you have 30 days from purchase to register it before penalties explore.

Documents you need before you start

Gather these documents before you visit a marine contractor or submit your registration. You'll need proof of ownership—either a bill of sale from the seller or a Michigan title if the boat was previously registered here. If the boat was registered in another state, bring that state's title or registration document.

You also need a valid photo ID (driver's license, passport, or state ID) and proof of your current address, such as a utility bill, lease, or bank statement dated within the last 60 days. If someone else owns the boat but you're registering it, bring a notarized power of attorney or written authorization from the owner.

If the boat has a hull identification number (HIN)—a 12-character code usually on the starboard side near the waterline—write it down. The DNR uses this to verify the boat's identity and check for theft or liens.

Registering through a county marine contractor

The fastest way to register is usually through your county's marine contractor. These are private businesses authorized by Michigan to handle boat registration. Search "marine contractor near me" or call your county clerk's office to find one in your area. Most are located at marinas, boat dealers, or bait shops.

Bring your documents and the boat's HIN. The contractor will fill out the process (Form REG 3921), collect the registration fee, and issue your registration number on the spot. You can then display the number on your boat when ready. The contractor sends your paperwork to the DNR, which mails your official registration certificate within two weeks.

This route costs slightly more than registering directly with the DNR because the contractor charges a service fee, usually $10 to $20. But you get your number the same day and avoid mail delays.

Registering online or by mail with the DNR

You can register online through the Michigan DNR's watercraft registration portal at michigan.gov/dnr. Upload photos of your proof of ownership and ID, enter your boat's information, and pay the registration fee by credit card. The DNR will email you a temporary registration number within 24 hours, which you can display while you wait for the official certificate by mail.

If you prefer to register by mail, read Form REG 3921 from the DNR website, fill it out completely, and mail it with copies of your documents and a check or money order to the Watercraft Registration Unit at the address listed on the form. Processing takes two to three weeks from the date the DNR receives your packet.

Online registration is faster and lets you start using your boat sooner. Mail registration is slower but works if you don't have access to a marine contractor or prefer not to visit one in person.

Registration fees and what they cover

Michigan registration fees are based on your boat's length. Boats under 26 feet cost less than boats 26 feet and over. Boats with higher horsepower may have slightly higher fees. The DNR website lists the exact fee for your boat's size and type before you register, so you'll know the cost upfront.

If the boat has never been titled in Michigan, you'll pay an additional $10 one-time title fee. This is separate from the registration fee. Your registration is valid for three years from the date it's issued, and you'll need to renew it before the expiration date to keep using the boat legally.

Some people may have access to for fee reductions. Military veterans, disabled persons, and certain nonprofit organizations may pay lower fees. Ask the marine contractor or check the DNR website to see if you may have access to.

Displaying your registration number correctly

Once you have your registration number, you must paint or attach it to both sides of your boat's hull in numbers at least 3 inches tall. The numbers must be in a contrasting color so they're straightforward to read from the water. Place them near the bow (front) of the boat, not on the stern (back).

The registration number format is two letters followed by four numbers, then two more letters. For example: MI 1234 AB. If your boat is a canoe, kayak, or other vessel without a motor, you don't need to display a number, but you still need to register it if you use it on public waters.

Keep your registration certificate on board whenever you operate the boat. Michigan law requires you to show it to a conservation officer if asked. A faded or missing number can result in a fine, so repaint it if it becomes hard to read.

What to do if you bought a used boat

When you buy a used boat, you have 30 days to register it in your name. If you don't register within 30 days, you may face a penalty. The seller should give you a bill of sale or the existing title. If the boat was registered in Michigan, the seller's registration certificate serves as proof of ownership until you register it yourself.

If the boat was registered in another state, bring that state's title or registration document to your marine contractor or the DNR. The DNR will verify the information and issue a new Michigan registration. If there's a lien on the boat (meaning someone loaned money for the purchase and holds a claim to it), the lienholder's name will appear on the title, and you may need their permission to register it in your name.

If you can't find the title or bill of sale, contact the previous owner or the state where the boat was last registered. The DNR can sometimes issue a registration without a title if you provide other proof of ownership, but this takes longer and may require a notarized statement.

Frequently Asked Questions

Do I need to register a boat with no motor?

Yes, Michigan requires registration for all boats used on public waters, including canoes, kayaks, and sailboats without motors. You don't need to display a registration number on these boats, but you must carry proof of registration on board. The fee is lower than for motorboats.

What happens if I don't register my boat?

Operating an unregistered boat is illegal and can result in a fine. A conservation officer can stop you and check your registration certificate. If you're caught without one, you may face a civil infraction with a fine of $100 or more, depending on the violation.

Can I register a boat I'm still paying off?

Yes, you can register a boat with an outstanding loan. The lender's name will appear on the title as a lienholder, but you can still register and use the boat. You'll need the lender's permission to sell or transfer the boat, but registration is separate from the loan.

How long does registration take if I register online?

The DNR emails a temporary registration number within 24 hours of approval, which you can display when ready. Your official registration certificate arrives by mail within two weeks. If you register through a marine contractor, you get your number the same day.

What if my boat's HIN is damaged or missing?

Contact the DNR or a marine contractor before you register. A damaged HIN can delay registration because the DNR needs to verify the boat's identity. In some cases, you may need a hull inspection or an affidavit of ownership. The DNR can guide you through the process.