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Boat Loan Calculator

Estimate the monthly payment and total interest on a boat loan. Marine loans can run long, so the term and rate drive most of the cost.

Loan details

Everything updates instantly and stays in your browser.

%
%
months
Common terms
$0

Your payment

Financing $47,250 after down payment and trade-in.

Monthly payment

$451.55

over 15 years · $47,250 financed

Total interest

$34,028

Total paid

$81,278

Payoff time

15 years

Year-by-year principal, interest, and remaining balance.
YearPrincipalInterestBalance
1$1,700$3,719$45,550
2$1,841$3,577$43,709
3$1,994$3,425$41,715
4$2,159$3,259$39,556
5$2,339$3,080$37,217
6$2,533$2,886$34,684
7$2,743$2,676$31,941
8$2,971$2,448$28,971
9$3,217$2,201$25,754
10$3,484$1,934$22,270
11$3,773$1,645$18,496
12$4,087$1,332$14,410
13$4,426$993$9,984
14$4,793$625$5,191
15$5,191$228$0

Estimates for a fixed-rate, fully-amortizing loan. Your actual rate, fees, and terms depend on the lender and your credit.

Financing a boat

Boats, like RVs, are often financed over long terms. That makes the payment feel affordable while the interest quietly adds up. Enter the price, your down payment, and the rate to see both the monthly cost and the total interest across the life of the loan.

Example

A $45,000 boat at 8% over 15 years is roughly $430 a month and about $32,000 in interest. Cutting the term to 10 years raises the payment but saves well over $10,000 overall.

Budget for the whole cost of ownership

Insurance, docking or storage, winterizing, and maintenance add up — build them into your budget alongside the payment. Comparing big-ticket loans? See the RV loan calculator and the general loan calculator.

Related calculators

RV Loan CalculatorMonthly payment and interest on a motorhome or travel-trailer loan.Auto Loan CalculatorCar payment with down payment, trade-in, and sales tax built in.Loan CalculatorPayment, total interest, and amortization for any fixed-rate loan.Amortization Schedule CalculatorFull month-by-month principal and interest breakdown for any loan.

Frequently asked questions

How long can a boat loan be?
Boat loan terms commonly range from 10 to 20 years depending on the loan size and the lender. Larger loans get longer terms, which lowers the payment but increases total interest.
What down payment do boat lenders want?
Typically 10%–20% down. A larger down payment lowers your rate and monthly payment and reduces the risk of owing more than the boat is worth as it depreciates.
Are boat loans secured?
Usually yes — the boat serves as collateral, much like a car loan. That keeps rates lower than an unsecured personal loan but means the lender can repossess the boat if you default.