Calculate the real monthly payment on a boat and trailer — sales tax on the net-of-trade price, negative equity from your old boat, and the lender term limits that apply at each loan size.
| Scenario | Monthly Payment | Total Paid | Total Interest | Amount Financed |
|---|---|---|---|---|
| $38,000 boat + $4,500 trailer / 10% down / 7.9% / 10 yr | $504 | $60,466 | $18,754 | $41,713 |
| $95,000 boat / 20% down / 8.25% / 15 yr | $796 | $143,366 | $61,267 | $82,099 |
| $220,000 yacht / 20% down / $12k upside-down trade / 7.5% / 20 yr | $1,608 | $385,909 | $186,310 | $199,599 |
| $18,000 jon boat + $1,800 trailer / $2k down / 9.9% / 5 yr | $410 | $24,593 | $5,257 | $19,336 |
Sales tax is charged on boat plus trailer, minus the trade-in credit. Each row is generated by the same function the calculator runs: net price, add tax and fees, add negative equity, then amortize at APR/12 over the term.
| Loan size | New boat APR | Used boat APR | Typical down | Common max term |
|---|---|---|---|---|
| Under $25,000 | 7.5% – 10.5% | 8.5% – 12.5% | 10% | 10 years |
| $25,000 – $100,000 | 6.75% – 9.0% | 7.75% – 11.0% | 10–15% | 15 years |
| $100,000 – $250,000 | 6.25% – 8.25% | 7.25% – 10.0% | 20% | 20 years |
| Over $250,000 | 6.0% – 8.0% | 7.0% – 9.5% | 20–30% | 20 years |
Marine lenders price by loan size because origination costs are fixed — a small loan cannot absorb them, so the APR is higher. Credit unions and boat-specific lenders usually beat dealer-arranged financing.
Many marine lenders will not finance a boat older than 10–15 years, and some cap the term so the loan does not outlive the vessel. A common rule: boat age plus loan term must stay under 20–25 years. Buying a 12-year-old boat usually means a 10-year term rather than the 15 the price would otherwise support — a shorter term means a higher payment, so budget for it before you commit.
The payment is the number buyers fixate on, but ownership cost is dominated by everything else. Marine service shops put annual maintenance at roughly 10% of the boat value, dockage or storage at $2,000–$12,000 a year depending on length, insurance at 1–1.5% of hull value, and fuel at 3–8 gallons per hour on planing hulls. On a $38,000 bowrider that is often $6,000–$9,000 a year before a single loan payment.
Usually yes, and it matters twice. Lenders finance boat-and-trailer packages because the trailer makes the boat movable and therefore easier to repossess. And sales tax treatment differs: many states tax the boat and trailer as one package, while others apply the general vehicle rate to the trailer and a separate, sometimes capped rate to the vessel. Entering the trailer separately here keeps the tax basis right.
Ask whether the loan carries a prepayment penalty — most marine loans do not, but dealer-arranged financing sometimes does. Selling before payoff also requires a payoff and lien release, so keep the lender details with the title.
⚠️ Important Note: This calculator estimates the loan payment only. Insurance, dockage, storage, maintenance and fuel typically add 20–35% to annual ownership cost and are not included. Rates are planning estimates, not a credit offer — confirm the APR, maximum term and any prepayment penalty with the lender in writing.