Enter the boat's price, your down payment, interest rate, and term to see your loan amount, monthly payment, and total interest.
The amortization math is identical to the Car Loan Calculator, but boat loans often run longer — 10 to 20 years is common versus 3 to 7 years for cars — because boats carry larger loan amounts and lenders size terms to keep monthly payments manageable. Boats also depreciate less predictably than cars, which factors into how lenders value the collateral over a longer term.
Lenders commonly ask for 10-20% down on a boat loan, similar to or slightly higher than typical auto loan requirements, with larger, older, or higher-risk vessels sometimes requiring more. A bigger down payment reduces both your monthly payment and the total interest paid over the loan's life.
Most retail boat loans use a fixed rate for the entire loan term, which keeps payments predictable and is what this calculator assumes. Variable-rate boat loans exist but are less common for personal-use vessels, and they carry the risk of payments rising if the reference rate they're tied to increases.
Yes — lenders typically reserve their best rates and longest terms for new or recent-model boats, while older or used boats often come with shorter maximum terms and higher rates, since the collateral value is less certain and boats can depreciate faster in percentage terms once past a certain age.
Worked example: a $45,000 boat with a $9,000 down payment leaves a $36,000 loan. At 7.5% APR over 10 years (120 months): monthly rate = 7.5 ÷ 12 ÷ 100 = 0.00625; payment = 36,000 × 0.00625 ÷ (1 − (1.00625)−120) ≈ $427.33 a month, totaling roughly $51,279.16 repaid — about $15,279.16 in interest over the loan.
Boat loans commonly run 10 to 20 years — far longer than a car loan, because the amounts are larger and lenders stretch the term to keep payments manageable. The consequence is severe. On $75,000 at 8%:
| Term | Monthly payment | Total interest |
|---|---|---|
| 10 years | $909.96 | $34,194.83 |
| 15 years | $716.74 | $54,013.03 |
| 20 years | $627.33 | $75,559.21 |
At 20 years the interest — $75,559.21 — exceeds the price of the boat. You pay for it twice, and the monthly saving against the 10-year term is only $282.63.
Most boats lose value quickly in the early years, while a 20-year loan repays principal slowly throughout. Negative equity is therefore common and can persist for years, which becomes a real problem if you want to sell, upgrade, or stop owning a boat at all. A larger deposit is the most effective protection, and lenders often require 10-20% anyway.
Annual ownership costs frequently run to a meaningful share of the purchase price once you total them:
Budget these before committing to the payment, not after. They're the reason boats get sold far more often than the finance term implies.
Marine lenders and credit unions generally beat dealer finance, and a secured marine loan usually beats an unsecured personal loan on rate. If you have substantial home equity, a home equity loan may be cheaper still — but it moves the security onto your house, which is a materially different risk for a discretionary purchase. Compare against a straightforward personal loan before deciding.