Run the numbers before you sign. Monthly payment, total interest, and full amortization schedule for any loan — in seconds.
The two most common financed purchases. Know your payment before you walk into the dealership.
Check a dealer's math before you sign. Enter loan amount, APR, and term to get the exact monthly payment and full payoff schedule.
Shorter terms and higher rates than cars — model the real cost of financing a bike before you commit.
Big-ticket recreational purchases often carry higher rates and longer terms. Run the full amortization before you fall in love with the toy.
Boat financing typically runs 10–20 years with rates higher than auto loans. See exactly how much that slip fee is going to cost in interest.
RVs depreciate fast and finance long. Model a 15-year note to understand the true cost of life on the road.
ATVs are often financed at dealer rates that can surprise you. Run the math before you ride off the lot.
Aircraft financing is a specialty market — longer terms, aviation lenders, and unique collateral rules. Model the debt before you get your ticket.
Productive assets — these loans often have tax implications and can be modeled against the cash flow they generate.
See your true monthly housing cost — full PITI with property tax, insurance, and PMI, not just principal and interest. Includes amortization schedule and down-payment sensitivity.
Whether you're financing a CNC machine, a fleet of trucks, or a conveyor system — model the debt service against the revenue the equipment will generate.
Mobile home financing often carries higher rates than traditional mortgages. See the full payment schedule across a 20-year note.
Every calculator here uses the same standard amortization formula. Here's what's actually happening.
Monthly Payment Formula
Where P = principal, r = monthly rate (APR ÷ 12 ÷ 100), n = total number of payments (years × 12).
Amortized loans have a fixed monthly payment. What changes each month is how much of that payment goes to interest vs. principal.
In month one, almost all of your payment is interest. By the final month, almost all of it is principal. The amortization table shows you the exact split each month.
A 1% difference in APR on a $50,000 boat loan over 15 years costs over $4,500 in total interest. Always shop the rate, not just the payment.
Extending from 5 to 7 years on a car loan lowers your monthly payment but can cost you 30–40% more in total interest paid. Use the calculator to see the real tradeoff.
A loan decision should not stop at the monthly payment. The real comparison is loan amount, APR, term, fees, total interest, and how quickly the balance falls if you sell, refinance, or pay extra.
When comparing lender quotes, hold the purchase price, down payment, term, and amount financed constant. That keeps the comparison honest and prevents a low payment from hiding a longer term or higher financed balance.
Then change one variable at a time: APR, term, or down payment.
Installment loans are front-loaded with interest because the balance is highest at the beginning. That is why the amortization schedule matters if you might sell early or refinance.
The schedule shows how much equity you are building and how much of each payment is still going to interest.
A payment that fits on paper can still create stress if insurance, repairs, taxes, storage, or operating costs are missing. Use the calculator result as the debt payment, then add the real ownership costs around it.
For business equipment, compare the payment to the incremental cash flow the asset should produce.
Dealers and sellers often anchor on monthly payment because it feels simple. Bring the conversation back to price, APR, term, fees, and total interest. A slightly higher payment on a shorter term can save a large amount of interest.
The best term is the shortest one you can afford comfortably while preserving cash reserves. Longer terms lower the payment but usually increase total interest.
Extra payments can reduce interest and shorten payoff time when there is no prepayment penalty. Keep emergency cash before sending every spare dollar to the lender.
Compare APR, fees, amount financed, term, total interest, prepayment rules, and whether the quote includes taxes or add-ons.
A larger down payment reduces the balance, payment, interest, and risk of being underwater if the asset loses value.