Boat Loan Calculator
Last updated: November 5, 2026
Estimate a boat loan payment, financed amount and total borrowing cost.
Estimated monthly loan payment
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- Estimated amount financed: —
- Estimated total interest: —
- Estimated total of loan payments: —
- Estimated cash needed upfront: —
On this page
Quick summary: Estimate a boat loan payment, financed amount and total borrowing cost.
Read the complete guide
Updated reference sections in this guide are in English.
What this calculator estimates
Estimate a boat loan payment, financed amount and total borrowing cost.
How to use it
Enter Boat purchase price ($); Down payment or cash contribution ($); Sales tax or financed assessment (%); Financed fees and closing costs ($); Annual interest rate (%); Loan term (years). Select Calculate to update the results.
How the calculation works
The financed amount equals purchase price plus the entered tax or assessment and financed fees, less the cash contribution. The payment uses a standard fixed-rate amortization formula.
Worked example: starting scenario
| Boat purchase price ($) | 78000 |
|---|---|
| Down payment or cash contribution ($) | 15600 |
| Sales tax or financed assessment (%) | 6 |
| Financed fees and closing costs ($) | 2100 |
| Annual interest rate (%) | 8.25 |
| Loan term (years) | 12 |
| Estimated monthly loan payment | $758.36 |
|---|---|
| Estimated amount financed | $69,180.00 |
| Estimated total interest | $40,023.29 |
| Estimated total of loan payments | $109,203.29 |
| Estimated cash needed upfront | $15,600.00 |
Important limitations
Actual rates, taxes, dealer charges, closing costs, insurance, collateral rules, balloon terms and lender underwriting vary. This is not a loan offer.
Read the financed amount before comparing payments
Check whether the purchase quotation includes a trailer, engine, delivery and registration. Ongoing marina, storage, insurance and maintenance charges are outside this payment model.
The model applies the entered percentage tax to the price, adds financed fees and subtracts the cash contribution. A negative financed amount is floored at zero. It rounds years × 12 to a whole number of monthly payments, with payments at each month end. Total loan payments exclude the down payment; total interest is those payments minus the financed principal.
At zero interest, $12,000 financed for 24 months costs $500 per month and $0 interest. A lower payment from extending the term is different from a lower total borrowing cost. Compare the loan offer’s amount financed, interest rate, APR and term as separate figures. CFPB’s loan comparison guidance explains the distinction.