Estimate your monthly boat finance payment, total interest, and full amortisation schedule.
Rates as of Q2 2025 (example)
| Period | Date | Payment | Principal | Interest | Balance |
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A boat loan calculator estimates your monthly payment, total interest, and full amortisation schedule for financing a boat purchase, taking into account your deposit, any trade-in value from an existing boat, admin fees, and an optional extra monthly payment to pay off the loan faster.
The amount you need to borrow is the boat's price, minus your deposit and any trade-in value, plus any admin fees added to the loan. This calculator then applies the standard amortising loan formula to that amount over your chosen term, with any extra monthly payment reducing the principal faster and cutting total interest.
Formula: Loan Amount = Boat Price − Deposit − Trade-in Value + Admin Fees. Monthly Payment = Loan Amount × [r(1+r)n] ÷ [(1+r)n − 1], where r is the monthly interest rate (APR ÷ 12 ÷ 100) and n is the number of monthly payments (Loan Term × 12).
Example: A £20,000 boat with a £2,000 deposit, no trade-in, and £100 in admin fees gives a loan amount of £18,100. At a 9% APR (example rate — enter your actual rate from a quote) over 10 years, the monthly payment would be roughly £229.28, with total interest of about £9,414 over the full term (total repaid around £27,514). (Note: all figures in this example are for illustration purposes only and do not represent a loan offer.)
Boat loans (sometimes called marine finance) are typically secured against the boat itself, similar to how a car loan is secured against a vehicle — this can mean more competitive rates than an unsecured personal loan, but also means the lender can repossess the boat if you fall behind on payments. Marine finance terms are often longer than car loans (sometimes 10-15 years or more, reflecting the longer useful life and higher cost of boats), which reduces the monthly payment but increases total interest paid over the life of the loan. Boats, like cars, generally depreciate in value over time, and the rate of depreciation can vary significantly by boat type, age, and condition — for a longer-term loan, it's worth considering whether the boat's value might fall below the outstanding loan balance (sometimes called being "underwater" on the loan) in the earlier years, which could matter if you need to sell. As with other secured lending, comparing the representative APR (which includes most fees) across lenders gives a more complete picture than comparing headline interest rates alone, and checking whether early repayment charges apply is worthwhile if you might want to pay off the loan early using the extra payment feature.
Often, yes — many boat loans (marine finance) are secured against the boat itself, similar to a car loan secured against a vehicle. This can result in more competitive interest rates than an unsecured personal loan, but it also means the lender has a claim on the boat if repayments aren't kept up.
In this calculator, admin fees are added to the loan amount, meaning you pay interest on the fee as well as the boat's price (minus deposit and trade-in). Some lenders instead require fees to be paid upfront — check your specific loan offer to see how fees are structured, as this affects both your loan amount and total cost.
Boats are often more expensive than cars and can have a longer useful life, so lenders may offer longer terms (sometimes 10-15 years or more) to keep monthly payments manageable. However, a longer term means more total interest paid over the life of the loan, even though the monthly payment is lower.
A trade-in is often more convenient and reduces the amount you need to finance immediately, but dealers may offer less than you could get selling privately. Selling privately can get a higher price but takes more time and effort, and you'd need to fund the new purchase (or arrange bridging finance) before the sale completes. Compare both options for your situation.
The interest rate is the cost of borrowing the principal amount. The APR (Annual Percentage Rate) is a more complete figure that includes most mandatory fees as well as interest, expressed as an annual rate — this makes the APR a better figure for comparing loan offers from different lenders, since a lower headline interest rate with high fees could have a higher APR than a slightly higher rate with no fees.
No. This calculator focuses only on the loan repayment side — it doesn't model the boat's changing value over time. Boats typically depreciate, and for longer loan terms, it's worth separately considering whether the boat's value might fall below your outstanding loan balance in the earlier years of the loan.
Disclaimer: The information, rates, and figures provided on this page are for educational and illustrative purposes only and do not constitute a loan offer or financial advice. The default interest rate is a sample value and does not reflect rates currently available from any specific lender. Marine finance terms, fees, and eligibility vary by lender and depend on your individual circumstances and the boat being financed. Always obtain a personalised quote from a lender before making borrowing decisions.