Pontoon Boat Loan Calculator

How a pontoon boat payment is calculated

Pontoon boats are usually financed with the same fixed-rate installment loan used for other recreational boats. You borrow the amount financed and repay it in equal monthly payments; each payment covers that month's interest and reduces the balance. The calculator uses the standard amortization formula:

Payment = P × r ÷ (1 − (1 + r)⁻ⁿ)
P = amount financed · r = APR ÷ 12 (as a decimal) · n = number of monthly payments

Pontoons are often sold as a package with the outboard motor and a trailer. Enter the full package price as the boat price, or add a trailer separately as "Other financed amount" under Advanced options.

A worked example

The calculator starts with these illustrative values. The rate is an example, not a current market rate or an offer.

• Pontoon package price: $48,000
• Down payment (10%): $4,800
• Amount financed: $43,200
• Example APR: 8.25%, a monthly rate of about 0.6875%
• Term: 10 years, or 120 monthly payments
• Estimated monthly payment: about $530
• Estimated total interest: about $20,383

In the first month, about $297 of the payment is interest and about $233 goes to principal. Over time the split reverses: by the final years, most of each payment reduces the balance.

How term, APR and down payment change it

• Term: stretching from 10 to 15 years lowers the payment by about $111 a month, but total interest rises by almost $11,900. A longer term trades a smaller payment for a higher total cost. Compare terms with the Loan Term Calculator.
• APR: one percentage point lower saves about $23 a month and about $2,700 in interest over 10 years in this example.
• Down payment: moving from 10% to 20% down lowers the payment by about $59 a month and total interest by about $2,265. See how much to put down on a boat.

New or used pontoon

Used pontoons can cost less up front, while terms and rates for older boats can differ from those for new ones. If you are weighing both, run each scenario with its own price, rate and term in the New vs Used Boat Calculator, and read about used boat financing.

Reading your results

The result card shows four figures besides the monthly payment. The amount financed is what you would borrow after the down payment and any trade-in. Total interest is every scheduled payment added up, minus the amount financed. Total cost adds your down payment and trade-in back in, so it reflects everything paid for the pontoon over the life of the loan, before taxes, insurance and upkeep. The payoff date assumes the loan starts this month and every payment is made on schedule.

Frequently asked questions