Boat Loan Calculator

Calculate the monthly payment on a boat or marine loan after your down payment and trade-in. See the loan amount, total interest, and total cost over the term — instant and fully validated.

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Boat Loan Calculator

Marine & watercraft financing

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Total Interest
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Financing a Boat

Boat loans work much like auto loans: your loan amount is the purchase price minus any down payment and trade-in value, and the monthly payment is set by the loan amount, interest rate, and term. Boat loan terms are often longer than car loans — commonly 10 to 20 years for larger vessels — which lowers the monthly payment but increases total interest. Rates depend on credit, loan size, the boat's age, and whether the loan is secured by the boat.

For example, a $60,000 boat with $9,000 down financed at 7.5% over 10 years gives a $51,000 loan and a payment of about $605/month, with roughly $21,600 in total interest. Stretching the same loan to 15 years drops the payment but adds thousands in interest. Remember that ownership costs go well beyond the loan — insurance, storage or slip fees, maintenance, fuel, and winterization can add substantially to the true cost of boat ownership.

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Longer Terms

Boat loans can run 10–20 years. Longer terms mean smaller payments but much more total interest — and you may owe more than the boat is worth for years.

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Down Payment

Lenders typically want 10%–20% down on a boat. A larger down payment lowers your loan, payment, and total interest.

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Trade-In

Trading in an existing boat reduces the amount you finance, just like the down payment. Enter its value to see the effect.

True Cost

Budget for insurance, storage, maintenance, fuel, and registration on top of the loan — they can rival the payment itself.

Boat Loan FAQ

The loan amount is the boat price minus your down payment and trade-in. The monthly payment then uses the amortization formula based on that amount, the interest rate, and the term. This calculator computes the payment, total interest, and total cost automatically.
Boat loans commonly range from 10 to 20 years, longer than typical auto loans, especially for larger or more expensive boats. Longer terms reduce the monthly payment but significantly increase the total interest you pay over the life of the loan.
Most lenders require 10% to 20% down for a boat loan. A larger down payment lowers your loan amount, monthly payment, and total interest, and can help you avoid being "underwater" (owing more than the boat is worth) early in the loan.
Boat ownership includes insurance, storage or marina slip fees, routine maintenance, fuel, registration, and winterization. These recurring costs can be substantial — sometimes approaching the loan payment itself — so factor them in before committing.

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✔ Reviewed by the True Value Calc editorial team🗓 Last updated June 2026📚 Sources: Freddie Mac PMMS, Consumer Financial Protection Bureau