Can You Mortgage a Boat: Eligibility, Paperwork, and Default

Yes, you can mortgage a boat, and if the vessel qualifies for federal documentation with the U.S. Coast Guard, the loan works much like a home mortgage: the boat is the collateral, the lien is recorded federally, and the lender gets a strong legal position called a preferred ship mortgage. Smaller or ineligible boats can still be financed, but through an ordinary secured loan under state law rather than a true marine mortgage.

Preferred Ship Mortgage vs. Ordinary Boat Loan

Not every boat loan is a mortgage in the maritime sense. Finance a smaller boat through a bank or credit union without federal documentation and the loan is a standard security agreement under state commercial law. The lender has a lien, but enforcing it means state court and competing with other creditors under rules that also cover car loans and equipment financing.

A preferred ship mortgage is different. When the vessel is documented with the Coast Guard and the mortgage is recorded at the National Vessel Documentation Center (NVDC), federal maritime law protects the lender’s interest. That preferred lien takes priority over virtually all other claims against the vessel except court costs and certain maritime liens like crew wages or salvage.¹ That priority is why lenders are willing to offer longer terms and more competitive rates on qualifying boats. If you default, the lender enforces through a federal admiralty action rather than state remedies.²

Which Boats and Owners Qualify

Three conditions have to be met before a vessel can carry a preferred ship mortgage: size, ownership, and documentation status.

The boat must measure at least five net tons to be eligible for federal documentation.³ Net tonnage measures interior volume, not weight, so the threshold is lower than it sounds. Most recreational boats over 25 feet in length clear it easily. Anything under five net tons is excluded from documentation and can only be financed through a state-level security agreement.

The owner must be a U.S. citizen. For a corporation, the company must be incorporated in the United States, its CEO and board chairman must be citizens, and no more than a minority of directors needed for a quorum may be non-citizens.⁴ Partnerships and LLCs face similar citizen-control requirements.

The vessel also has to actually be documented with the Coast Guard, not just registered with a state agency. State registration and federal documentation are separate systems. A Certificate of Documentation is proof of the vessel’s nationality and is what makes it eligible for a preferred mortgage.⁵

What Lenders Look for Financially

Marine lenders evaluate borrowers much the way home mortgage lenders do. Most look for a debt-to-income ratio below 40% and a credit score of at least 670 to 700 for competitive terms. The standard down payment is around 15% of the purchase price, with a working range of about 10% to 30% depending on the age of the boat, the loan amount, and the term. Older vessels and longer loans generally push the down payment higher.

Loan terms typically run 10 to 20 years, with some lenders stretching to 21 years on higher-value vessels. Interest rates are higher than home mortgages but well below unsecured personal loans. As of late 2025, average boat loan rates hovered around 8.9%, though strong credit and newer vessels could pull starting rates into the 6% to 7% range. Expect to provide two years of tax returns and recent bank statements.

Paperwork You’ll Need to Close

Marine Survey

A professional marine survey is the foundation of the loan file. The surveyor inspects the vessel’s structural condition, systems, and safety compliance, then issues a report with a fair market value. Lenders use that number to set the loan-to-value ratio. Surveys are usually priced per foot of length, often $28 to $30, so a 30-foot boat runs roughly $850 to $900, and a 50-footer approaches $1,500. The surveyor should hold certification from a recognized body such as the Society of Accredited Marine Surveyors or the National Association of Marine Surveyors.

Hull Insurance

Comprehensive hull insurance is non-negotiable. The policy must name the lender as primary loss payee so the lender’s investment is covered if the boat is damaged, sinks, or is destroyed. Most lenders also require a breach-of-warranty endorsement, which keeps the lender’s coverage intact even if you violate a policy condition. Without it, something as simple as taking the boat outside its agreed cruising area could void the lender’s protection.

Abstract of Title

Before closing, request an Abstract of Title from the NVDC using Form CG-7043. The abstract traces the vessel’s full ownership history and reveals any outstanding mortgages or liens. The fee is $25.⁶ Skipping this is where deals blow up. An unrecorded old lien discovered after closing is expensive and slow to clean up.

Application for Documentation

The primary application for federal documentation is Form CG-1258 from the NVDC.⁷ It requires the vessel’s official number and name, hailing port, precise measurements from the marine survey, and Social Security or Tax Identification numbers for all owners. Small discrepancies between the form and the survey report tend to trigger requests for additional documentation and slow the file down.

Recording the Mortgage, Fees, and Timing

The completed package goes to the NVDC in Falling Waters, West Virginia. You can submit electronically through the NVDC portal or by mail.⁶ The mortgage must be filed with the Secretary of Transportation (delegated to the Coast Guard) to be valid against third parties. Until it is, the mortgage is only enforceable between the original parties.⁸

Government fees are lower than most borrowers expect. Mortgage recording is $4 per page under the NVDC’s fee schedule.⁹ Bill of sale recording is $8 per page. Combined with the initial documentation fee and any endorsements, the government’s filing cost for a straightforward transaction is usually well under $200. Your lender and closing agent will likely add service fees of their own.

Processing times at the NVDC rise and fall with workload. The center publishes a case processing report on its website, and timelines can stretch during periods of high volume or government funding disruptions. Plan for several weeks at minimum, and check current status before submission if you’re working against a closing deadline. Once recording is finalized, you receive a Certificate of Documentation that reflects the vessel’s federal status and the recorded mortgage lien.

Can You Deduct the Interest?

If your boat has sleeping, cooking, and toilet facilities, the IRS treats it as a home for the mortgage interest deduction.¹⁰ Interest on the marine mortgage can be deductible just like interest on a house mortgage, and the vessel can qualify as either your main home or your second home.

Second-home treatment depends on whether you rent the boat. If you never rent it, you can treat it as a qualified second home without meeting any minimum personal-use days. If you do rent it part of the year, you must use it personally for the greater of 14 days or 10% of the rental days to keep the deduction.¹⁰

The overall mortgage interest deduction is capped at $750,000 in total acquisition debt ($375,000 if married filing separately), and that cap covers your primary residence and second home combined.¹⁰ If you already carry a $600,000 home mortgage, only $150,000 of boat mortgage debt would produce deductible interest. On a high-value vessel the savings can run into thousands per year, so run the numbers with a tax advisor before closing.

Keeping the Documentation Current

Federal documentation is not file-and-forget. Certificates of Documentation for recreational vessels renew for one to five years at a time, at $26 per year.¹¹ Renewing online through the NVDC portal is the simplest route; online customers don’t submit a separate paper form.

Timing matters. Renewals received up to 30 days after expiration are processed as late renewals with a $5 late fee. After 31 days you’re in a reinstatement process, which is more involved. Renewing more than 60 days before expiration shortens the document’s validity period, so the sweet spot is within 60 days of expiration.¹¹

If you move, you must notify the NVDC within 10 days of any address change. The notice must include the vessel’s official number, old and new addresses, and your contact information. You can send it by email or fax, or note it on your next renewal form. The NVDC won’t accept address change requests from third parties.¹²

Letting documentation lapse while a preferred mortgage is active is dangerous. The lender’s priority position depends on the vessel being documented. If documentation expires, the legal footing of that priority becomes uncertain, and most loan agreements treat the lapse itself as a default.

What Happens If You Default

Default gives the lender serious enforcement options. The lender can bring a civil action in rem against the vessel in federal district court, meaning the suit targets the boat itself.² Federal courts have exclusive jurisdiction over those actions. The court issues a warrant of arrest for the vessel, and the U.S. Marshals Service handles the seizure.¹³

If the court orders a sale, the vessel sells free and clear of existing claims, which then transfer to the proceeds under a strict priority order. The preferred mortgage lien sits near the top, behind only court-allowed expenses and preferred maritime liens like crew wages, salvage, and tort claims.¹ The lender can also pursue you personally for any deficiency if the sale doesn’t cover the balance.²

State Taxes and Registration Still Apply

Federal documentation does not shield you from state taxes. Most states impose sales or use tax on vessel purchases, with rates ranging from zero in a handful of states to over 10% in high-tax jurisdictions. Some states cap total tax on vessels or charge a flat fee. Use tax usually applies based on where the boat is principally moored, so moving it to a different state can create a new tax obligation. On a six-figure vessel, a surprise tax bill can change the entire deal, so check your home port state’s rules before closing.

Many states also require federally documented vessels to carry a state registration sticker, even though the state registration numbers must be removed once the vessel is documented. Annual state registration fees for documented vessels range roughly from $5 to $200 depending on state and size. These obligations run alongside your federal documentation and renewal fees.

1
Office of the Law Revision Counsel. 46 USC 31326 – Court Sales to Enforce Preferred Mortgage Liens and Maritime Liens and Priority of Claims
2
Office of the Law Revision Counsel. 46 USC 31325 – Preferred Mortgage Liens and Enforcement
3
eCFR. 46 CFR Part 67 – Documentation of Vessels
4
eCFR. 46 CFR Part 67 – Documentation of Vessels – Section 67.39
5
eCFR. 46 CFR Part 67 – Documentation of Vessels – Section 67.1
6
U.S. Coast Guard. Abstract of Title and Certified COD Request Form CG-7043
7
U.S. Coast Guard. National Vessel Documentation Center – Instructions and Forms
8
Office of the Law Revision Counsel. 46 USC 31321 – Filing, Recording, and Discharge
9
U.S. Coast Guard. National Vessel Documentation Center Table of Fees
10
Internal Revenue Service. Publication 936, Home Mortgage Interest Deduction
11
U.S. Coast Guard. Vessel Renewal Notification Application for Renewal CG-1280
12
GovDelivery (USCG/NVDC). Reminder to Managing Owners – Change of Address Requirement for Certificate of Documentation Holders
13
U.S. Marshals Service. Admiralty