Boat Loan Calculator

Estimate the monthly payment, total interest, and amount financed on a boat loan after down payment, trade-in, and sales tax.

Independently verified for accuracy

Calculator by Toolsloft ↗
Amount financed
43000
Monthly payment
398.62
Total interest
28750.76
Total paid
71750.76

This calculator works out the monthly payment on a boat loan after you fold in sales tax, a down payment, and any trade-in. Enter the purchase price, rate, and term to see what you would owe each month and how much interest the loan adds over its life. Use it to compare dealer financing against a bank or credit union quote before you commit.

How this is calculated

The loan amount is the price plus sales tax minus your down payment and trade-in. The payment comes from the standard amortizing-loan formula, Payment = P*r*(1+r)^n / ((1+r)^n - 1), where r is the annual rate divided by 12 and n is the term in months.

How to use

  1. Enter the boat price and any sales tax rate.
  2. Enter your down payment and trade-in value.
  3. Enter the annual rate and term in months to read the payment and total interest.

Examples

  • $48,000 boat, $5,000 down, 7.5% / 180 mo: payment $398.62
  • $30,000 boat, $2,000 trade-in, 6% tax, 7% / 120 mo: payment $346.00

FAQ

How is the amount financed calculated?
Price plus sales tax, minus your down payment and any trade-in value. That figure is the principal the payment is based on.
Why are boat loan terms so long?
Lenders often stretch boat loans to 15 or 20 years to lower the monthly payment. A longer term cuts the payment but raises the total interest you pay.
Does sales tax get added to the loan?
In this calculator it does. Sales tax is applied to the price and rolled into the amount financed, which is how many dealers structure the deal.

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