ConverterHub

Boat Loan Calculator

Enter the loan amount, annual interest rate, and term in months to find the monthly payment.

Result

$556.21
$40,117.33
$100,117.33

How it is calculated

The payment comes from the standard level-payment formula P = L × r ÷ (1 − (1 + r)−n), where L is the amount borrowed in dollars, n is the term in months and r is the monthly rate, which is the annual rate in percent divided by 100 and then by 12. Total paid is the unrounded payment times n, and total interest is total paid minus L.

If the annual rate is 0 the formula would divide by zero, so the tool simply uses L ÷ n. The term must be at least one month and the amount above zero, otherwise nothing is shown. Down payment, fees, taxes, insurance and any balloon payment are not part of the calculation, so subtract your down payment from the price before entering the amount.

Worked example

Borrow $60,000 at 7.5% a year for 180 months (15 years). The monthly rate is 7.5 ÷ 100 ÷ 12 = 0.00625. The discount factor (1.00625)−180 is about 0.3258, so the payment is 60,000 × 0.00625 ÷ (1 − 0.3258) = $556.21 a month. Over 180 payments you repay $100,117.33 in total, of which $40,117.33 is interest.

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Common mistakes

  • Entering the term in years. The field is in months, so a 15-year loan is 180, not 15.
  • Entering the full boat price as the loan amount and forgetting to subtract the down payment or trade-in.
  • Comparing loans only by monthly payment. A 20-year term lowers the payment but, as the total interest line shows, can add many thousands to the cost.
  • Typing the rate as a decimal such as 0.075. The field expects percent, so 7.5.
  • Expecting the result to include sales tax, registration, insurance or lender fees. None of these are in the figure.

Sources

About this calculator

A boat loan is a standard amortizing installment loan, structured the same way as an auto loan: the lender advances a fixed amount, and the borrower repays it in equal monthly payments made up of principal and interest over an agreed term, calculated with the same amortization formula used for car and personal loans.

Because boats and other recreational vehicles depreciate quickly and often cost far more than a car, lenders frequently stretch boat loan terms out much longer — sometimes 10 to 20 years for larger vessels — which lowers the monthly payment but increases total interest paid over the life of the loan. Loan amount, rate and term in months give the monthly payment, total interest and total cost, so a buyer can weigh a lower monthly bill against a longer loan that costs more overall.

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