Boat Loan Calculator: Monthly Payment on a Marine Loan
Work out the monthly payment and total interest on a loan for a boat, where the vessel secures the loan and terms can stretch well beyond a decade.
Adjust the inputs and select Calculate for a full breakdown.
Year-by-year amortization schedule
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Monthly payment | Total interest | Total of payments |
|---|---|---|---|
| $45k · 7.8% · 10-year | $541.23 | $19,947.62 | $64,947.62 |
| $20k · 8.5% · 7-year | $316.73 | $6,605.30 | $26,605.30 |
| $90k · 7.2% · 15-year | $819.04 | $57,427.57 | $147,427.57 |
| $30k · 9.0% · 8-year | $439.51 | $12,192.59 | $42,192.59 |
How This Calculator Works
Enter the amount financed — the boat price after any down payment and trade-in — the APR, and the term. Marine loans are secured by the boat and are often written over ten to twenty years for larger vessels. The calculator turns the APR into one constant monthly payment and shows the falling balance year by year.
The Formula
Fixed-Rate Amortization
P = loan amount, r = monthly rate (APR ÷ 12), n = number of monthly payments
Worked Example
Financing $45,000 for a boat at 7.8% APR over 10 years gives a monthly payment of about $541. Over the loan you repay roughly $65,000, so interest adds close to $20,000 to the amount you financed.
Key Insight
Lenders often require a marine survey and proof of insurance before approving a boat loan, and they price older or larger vessels more cautiously. A solid down payment improves both the rate offered and your equity position from day one.
Boat loan structures
BOAT pricing tiers 2024.
Small fishing boat. $10K-$30K.
Bowrider. $25K-$80K.
Pontoon. $25K-$80K.
Cruiser. $80K-$300K.
Yacht. $300K-$10M+.
Substantial — substantial substantial substantial substantial.
MARINE LENDERS.
Trident Funding. Substantial — substantial substantial substantial.
LightStream Marine.
Discover Marine.
Essex Credit.
BoatUS Lending.
Substantial — substantial substantial substantial substantial.
Substantial — substantial 7-12% good credit.
RATES + TERMS.
Good credit 720+. 7-9%.
Average 660-719. 9-12%.
Subprime <660. 12-18%.
Substantial — substantial substantial substantial substantial.
Term 5-20 years.
Substantial — substantial yachts often 15-20 yr.
Substantial — substantial small boats 5-10 yr.
DOWN payment.
10-20% typical.
Substantial — substantial 20%+ better rates.
Substantial — substantial substantial substantial substantial.
Survey + insurance + strategy
MARINE SURVEY required (used).
Substantial — substantial $15-$30/ft.
Substantial — substantial substantial substantial substantial.
Substantial — substantial pre-purchase inspection.
Substantial — substantial substantial substantial substantial.
INSURANCE substantial.
Substantial — substantial $500-$3K+/yr.
Substantial — substantial value-based.
Substantial — substantial substantial substantial substantial.
USED boats.
Substantial — substantial 30-50% off new 5 yrs.
Substantial — substantial age affects loan rate.
Substantial — substantial substantial substantial substantial.
Substantial — substantial 10+ yr old harder finance.
LIVEABOARD.
Substantial — substantial mortgage interest deductible (qualifies as home).
Substantial — substantial substantial substantial substantial.
Substantial — substantial sleeping + cooking + toilet.
FUEL.
Substantial — substantial $400-$2K/season.
Substantial — substantial substantial substantial substantial.
TOTAL OWNERSHIP.
Substantial — substantial 10% rule annually.
Substantial — substantial loan + insurance + slip + maintenance + fuel.
Substantial — substantial substantial substantial substantial.
STRATEGY substantial.
(1) Marine lenders for boat-specific terms.
(2) 20%+ down for best rates.
(3) Used 30-50% savings.
(4) Pre-purchase survey.
(5) Insurance shop.
(6) Boat club / rental if occasional.
(7) Liveaboard tax benefit.
U.S. boat loan benchmarks (2024)
Reference boat financing.
| Item | Detail |
|---|---|
| Small fishing | $10K-$30K |
| Bowrider | $25K-$80K |
| Cruiser | $80K-$300K |
| Yacht | $300K-$10M+ |
| Good credit APR | 7-9% |
| Subprime APR | 12-18% |
| Term | 5-20 yrs |
| Down payment | 10-20% |
| Marine survey | $15-$30/ft |
| Insurance annual | $500-$3K+ |
| Liveaboard tax | Mortgage deductible |
| 10% rule annual cost | Total ownership |
Marine lenders (Trident, LightStream, Discover) specialty terms vs banks. 20%+ down better rates. Pre-purchase survey required used ($15-$30/ft). Liveaboard qualifies as second home (mortgage interest deductible). 10% rule annual ownership cost. NMLA + CFPB + FED data.
Frequently Asked Questions
Is a boat loan secured?
Usually yes — the boat is the collateral. That keeps the rate below unsecured borrowing, but the lender can repossess the vessel if the loan is not repaid.
What term can I get on a boat loan?
Terms range widely, from a few years for a small boat to twenty years for a large vessel. A longer term lowers the monthly payment but raises total interest considerably.
Will I need a marine survey?
For many boats, especially used or higher-value vessels, lenders require a marine survey to confirm the boat's condition and value before approving the loan.
What counts as the amount financed?
Enter the purchase price after your down payment and any trade-in. Some lenders also let you roll in taxes, registration, or outfitting costs.
Does boat insurance affect the loan?
Lenders generally require proof of insurance for the life of a secured boat loan. Insurance is a separate cost and is not part of the payment this calculator shows.
When is this calculator unreliable?
Less reliable when marine-specific lenders vs banks (rates + terms differ), when age of boat affects rate, when liveaboard vs recreational classification (mortgage tax deductible), when marine survey required ($15-$30/ft), when insurance required + marine costly, when trailer + accessories financed together, or when used boat depreciation impacts LTV. 10% rule annual ownership cost.
References & Authoritative Sources
- Consumer Financial Protection Bureau (CFPB) — Consumer Lending Resources · consulted June 1, 2026 · Federal consumer protection
- Federal Reserve / FRED — Consumer Credit Statistics · consulted June 1, 2026 · Federal economic data
- National Marine Lenders Association (NMLA) — Marine Lending Standards · consulted June 1, 2026 · Industry trade
Related Calculators
Data Sources & Benchmarks
This calculator draws on 3 independent, dated sources. The starting values for interest rate are taken from the benchmarks below and refresh whenever the snapshots are updated.
Methodology & Review
Boat loan = principal × (rate × (1+rate)^n) / ((1+rate)^n − 1). U.S. 2024: boat $10K-$500K+; loan rates 7-12% good credit; terms 5-20 years (longer for yachts); 10-20% down typical. Substantial marine lenders (Trident, LightStream Marine, Discover) vs traditional banks. RELIABILITY: Reliable for documented loan. Less reliable when (a) marine-specific lenders vs banks (rates + terms differ), (b) age of boat affects rate, (c) liveaboard vs recreational classification, (d) marine survey required ($15-$30/ft), (e) insurance required + marine costly, (f) trailer + accessories financed together, (g) used boat depreciation impacts LTV.
Updated