About the Boat Loan Calculator
Buying a boat is usually financed with a loan that runs longer than a car loan, often 10 to 20 years. This boat loan calculator works out the monthly payment from the price of the boat, your down payment and trade-in, the sales tax and fees and the interest rate and term. You can choose whether tax and fees are added to the loan or paid in cash, and see the cash you need at purchase, the amount borrowed, the total interest and the total cost of owning the boat, not counting running costs. It helps you compare dealers' offers and decide on a budget before visiting a showroom.
Updated October 2026
How to use the Boat Loan Calculator
- 1Enter the price of the boat and your down payment.
- 2Enter the value of a trade-in, or 0 if you have none.
- 3Enter the sales tax rate and fees such as registration and documents.
- 4Enter the interest rate and the loan term in years, and choose whether tax and fees are financed.
- 5Read the monthly payment, the cash needed at purchase and the total cost.
Budgeting for a boat
A common advice is to keep all boat costs, including the loan, insurance, storage and fuel, within a modest share of your income and not to stretch to the maximum a lender offers. Think about how often you will really use the boat. Many owners find that renting or sharing is cheaper for a few trips a year. Use the calculator to compare several prices and terms and pick a payment you could keep up in a bad year.
Tips for a better loan
- Get quotes from a bank or credit union as well as the dealer
- Check whether the loan has a penalty for paying early
- Compare the total cost, not only the payment
- Have a marine survey done on a used boat
- Ask what insurance the lender requires
Related tools
The Auto Loan Calculator and Loan Calculator work the same way for cars and general borrowing, the Amortization Calculator shows each payment, the Down Payment Calculator helps you plan a deposit and the Sales Tax Calculator works out tax on a price. Check actual terms with the lender before you sign.
Features
- Monthly payment
- Sales tax calculated after the trade-in
- Fees financed or paid in cash
- Cash needed at purchase
- Total interest and total cost
- Terms up to 30 years
- Runs in your browser
Frequently asked questions
How much is a monthly boat payment?
It depends on the price, the rate and the term. A 55,000 boat with 8,000 down at 8.2 percent over 15 years, with tax and fees financed, costs roughly 495 a month. Longer terms lower the payment but add interest, so compare total cost as well as the monthly figure.
How long can a boat loan be?
Boat loans commonly run from 5 to 20 years, and sometimes longer for larger vessels, while car loans are usually shorter. Lenders often offer longer terms on newer boats and bigger loans. Rates may be higher for older boats and for longer terms.
How much should I put down on a boat?
Lenders often ask for 10 to 20 percent. A bigger down payment lowers your loan, your payment and your interest, and it protects you from owing more than the boat is worth, since boats lose value quickly in the first years.
Is sales tax charged on the trade-in?
In many places tax is charged only on the difference between the price and the trade-in value. The calculator works that way. Rules differ by state and country, so check yours and adjust the tax rate if needed.
What other costs come with owning a boat?
Insurance, storage or mooring, fuel, maintenance, winterising, registration and repairs can add 10 percent of the boat's value or more each year. They are not in this calculator, so add them to your budget separately.
Can I use this for a jet ski, RV or other vehicle?
Yes. The loan arithmetic is the same for any vehicle. Enter the price, trade-in, tax, fees, rate and term. There are also dedicated calculators on this site for car loans and leases.