Boat Loan Calculator

Estimate monthly payment, total interest, and payoff timeline. Supports down payment, trade-in, taxes, fees, and extra payments.

How to Use

  1. Enter boat price, APR, and loan term.
  2. Add down payment, trade-in, taxes, and fees (optional).
  3. Use extra monthly payment to estimate early payoff (optional).
  4. Open “Show Work” for the formula and a breakdown.
Summary
Updates as you type. Uses standard amortized loan math.
Monthly
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Loan Amount
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Total Interest
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Total Paid
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Est. payoff
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Extra monthly
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Total taxes/fees
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Inputs
All fields are optional except Price, APR, and Term.
Base purchase price before taxes/fees.
Annual Percentage Rate (nominal).
Boat loans are often 60–240 months.
Enter as dollars or percent of price.
Optional. Reduces amount financed.
Mode: % applies to taxable base (config below).
Optional. Can be financed or paid upfront.
Optional. Reduces interest and payoff time.
Tip: This tool estimates payments using standard amortization. Exact lender rules can vary.
Show Work (step-by-step)
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Work is shown in base units (USD, months). Interest assumes fixed APR with monthly compounding.

Details

  • Monthly rate: r = APR / 12
  • Payment (amortized): PMT = P × r ÷ (1 − (1 + r)−n)
  • If APR is 0%: PMT = P ÷ n
  • Extra payments: applied monthly to principal after interest (estimate).

Taxes/fees can be financed or paid upfront; use the toggles to model your deal.

FAQ

What counts as “amount financed”?

Typically: price minus down payment and trade-in, plus any financed taxes/fees.

Do extra payments always shorten the loan?

Usually yes, if applied to principal and there’s no prepayment penalty. Some lenders apply differently—check your contract.

Is this exact to the penny?

It’s an estimate. Lenders round interest and payments by statement rules and timing.

Tool Info

Last updated:

Updates may include amortization table export, edge-case handling, and lender-style rounding options.