Boat Loan Calculator
Estimate boat financing payments over the long terms typical of marine lending.
About Boat Loan Calculator
Marine financing works like any amortising loan, but with longer terms (up to 20 years) and slightly higher rates than car loans — reflecting the resale-value and maintenance risks of watercraft. The real eye-opener for first-time buyers is the ownership cost: insurance, storage and maintenance easily equal or exceed the loan payment itself. This calculator makes the full picture visible before you sign.
Formulas
Monthly payment
Payment = (Price − Down) × monthly_rate / (1 − (1+r)^−n)
- P
- Boat price
- D
- Down payment
- r
- Monthly rate
- n
- Months
Total monthly ownership cost
Monthly ownership = Loan payment + (Insurance + Storage + Maintenance) / 12
Worked example
With the default values below, Boat Loan Calculator returns Monthly Loan Payment of $354.51. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Boat Priceaccepts 1,000–5,000,000 $
- 45,000 $
- Down Paymentaccepts 0–5,000,000 $
- 9,000 $
- Annual Interest Rateaccepts 0–30 %
- 8.5 %
- Loan Termaccepts 1–20 years
- 15 years
- Estimated Annual Insuranceaccepts 0–100,000 $
- 1,200 $
- Annual Storage / Slip Feesaccepts 0–50,000 $
- 2,400 $
- Estimated Annual Maintenanceaccepts 0–50,000 $
- 1,500 $
Results
- Monthly Loan Payment
- $354.51
- Total Monthly Cost (with upkeep)Loan payment + insurance + storage + maintenance, monthly.
- $779.51
- Loan Amount
- $36,000
- Total Interest Paid
- $27,811
- Total Ownership CostDown payment + all loan payments + insurance + storage + maintenance.
- $149,311
- Down Payment Percentage
- 20.0%
Step by step
- 1Loan amount= $36,000.0020% down payment.
- 2Monthly payment= $354.51
- 3Total interest over loan= $27,811.12
- 4Annual ownership costs (loan + upkeep)= $9,354.07
- 5Total ownership cost over loan term= $149,311.12
Assumptions and limits
- The result is derived only from the 7 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation or tax into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
- This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How long can I finance a boat?
Most lenders offer 10–20 year terms depending on the loan size and boat age. Loans under $25,000 are often capped at 10–12 years. Larger new-boat loans can reach 20 years. Older boats (10+ years) typically receive shorter terms.
What down payment do I need?
Most marine lenders require 10–20% down. Higher down payments reduce the loan amount and improve your rate. Some lenders require higher down payments on older vessels that depreciate faster.
How do I estimate insurance costs?
Marine insurance typically runs 1.5–2% of the boat's agreed value per year for a recreational vessel. Larger, faster or older boats cost more to insure. Get a quote from a marine insurance broker before committing.