Boat Loan Payment Calculator

Calculate your monthly boat loan payment and see the total interest you will pay over the life of the loan. Enter the loan amount, annual interest rate, and loan term. The calculator uses the standard fixed-rate loan amortisation formula used by all lenders.

$32,000.00
$381.00
$45,720.00
$13,720.00

Loan payment formula

PMT = P × [r(1+r)n] / [(1+r)n - 1]

Where PMT is the monthly payment, P is the principal (loan amount minus down payment), r is the monthly interest rate (annual rate / 12), and n is the total number of payments (years * 12).

Boat loan payment calculator: frequently asked questions

How is a boat loan monthly payment calculated?

Monthly payment = P * (r * (1+r)^n) / ((1+r)^n - 1), where P is the loan principal, r is the monthly interest rate (annual rate divided by 12), and n is the number of monthly payments. This is the standard fixed-rate loan amortisation formula used by all lenders.

What is a typical boat loan interest rate?

Boat loan rates in the US typically range from 6% to 14% APR depending on creditworthiness, loan term, and whether the boat is new or used. Rates from marine lenders (banks, credit unions, NMMA-affiliated lenders) for well-qualified borrowers buying new boats are often in the 6% to 9% range. Used boat loans typically carry higher rates.

What are typical boat loan terms?

Boat loan terms commonly range from 5 to 20 years. Shorter terms (5 to 10 years) have higher monthly payments but significantly lower total interest. Longer terms (15 to 20 years) are available for higher loan amounts (typically over $25,000 to $50,000). Some lenders offer up to 20-year terms for larger vessels.

Can I deduct boat loan interest on my taxes?

If your boat qualifies as a second home (has sleeping, cooking, and toilet facilities), the interest on a loan secured by the boat may be deductible as qualified home interest under IRS Publication 936. Consult a tax professional to confirm your specific situation qualifies under current IRS rules.

What is the difference between APR and the interest rate on a boat loan?

The interest rate is the cost of borrowing expressed as a percentage, used to calculate your payment. APR (annual percentage rate) includes the interest rate plus other loan costs such as origination fees, expressed as a yearly rate. APR gives a more complete picture of the total cost of the loan. This calculator uses the stated interest rate for payment calculations.

Official sources

Reviewed by the CalculatorHub team, edited by James Graham, 14 June 2026. See our methodology.