Boat Loan Calculator

Enter your boat price, down payment, APR, and term to see the monthly payment, total interest, and total cost of a fixed-rate boat loan.

Quick Facts

Formula
Amortized payment: M = P × i ÷ (1 - (1 + i)-n)
P = amount financed (price - down payment), i = monthly rate (APR ÷ 12 ÷ 100), n = term in months.

Your Results

Calculated
Monthly payment
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Principal + interest each month
Total interest
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Interest paid over the full term
Total of payments
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Sum of all monthly payments
Amount financed
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Boat price minus down payment

Ready

Enter your boat price, down payment, APR, and term, then calculate.

How the Boat Loan Calculator works

A boat loan is a fixed-rate installment loan, so its monthly payment is set by the standard amortization formula. Enter the boat price, your down payment, the annual percentage rate (APR), and the term in years, and the calculator returns the monthly payment, the total interest you will pay, and the total of all payments over the life of the loan.

The formula

The amount financed is the boat price minus your down payment: P = price − down payment. The monthly payment is then M = P × i ÷ (1 − (1 + i)−n), where i is the monthly interest rate (APR ÷ 12 ÷ 100) and n is the number of monthly payments (term in years × 12). Total interest is the sum of all payments minus the amount financed: M × n − P. When the rate is 0%, the payment is simply P ÷ n.

What to look at beyond the monthly payment

  • Total interest paid: a longer term lowers the monthly payment but raises the lifetime interest. A 20-year boat loan can cost far more in interest than a 10-year loan at the same rate.
  • APR vs. interest rate: APR folds fees into the effective rate, so it is the better number for comparing lenders. Enter each offer's APR to compare true cost.
  • Down payment: a larger down payment lowers the amount financed, which cuts both the monthly payment and the total interest.

Extra payments and payoff

Boat loans usually have no prepayment penalty. Paying extra toward principal early in the term reduces the balance that interest is charged on, so it shortens the loan and lowers total interest. This calculator assumes fixed, on-schedule payments, so add any extra principal separately when you want to see its effect.

Frequently Asked Questions

How is a boat loan payment calculated?
It uses standard loan amortization. The amount financed (boat price minus down payment) is repaid over the term at a fixed rate. The monthly payment is M = P × i ÷ (1 − (1 + i)−n), where P is the amount financed, i is the monthly rate (APR ÷ 12), and n is the number of monthly payments. Total interest equals M × n minus P.
What is a typical boat loan term and rate?
Boat loans are commonly written for terms of 10 to 20 years, with larger loan amounts qualifying for longer terms. The rate depends on your credit, the loan size, and whether the boat is new or used. Enter your own APR and term for an accurate payment rather than relying on averages.
Does a bigger down payment lower the interest I pay?
Yes. Interest is charged only on the amount financed, and the down payment reduces that balance. A larger down payment therefore lowers both the monthly payment and the total interest paid over the life of the loan.

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