Loan Payment Calculator
Monthly payment for any loan — auto, RV, boat, solar and more.
One formula, any loan — computed on your device, not on a serverYour payment breakdown appears here
Fill in the loan details and press Calculate — the monthly payment, total interest and schedule will render right on this page, with nothing sent to any server.
How to use
This is the universal monthly payment calculator. One formula serves every amortizing loan: the amount you borrow, the annual rate and the number of years are all it needs. The sections below give the typical rate and term ranges for the most common purchase types so you can start with realistic numbers.
How to use
- Enter the loan amount (the financed amount, not the sticker price).
- Set the APR the lender quoted and the term in years.
- Press Calculate for the monthly payment and lifetime interest.
Example
Borrow $15,000 at 6.5% for 4 years: the payment is about $356 and the total interest about $2,100. The same $15,000 over 6 years drops the payment to $251 but lifts the interest to about $3,100.
Formula
PMT = P·r·(1+r)^n / ((1+r)^n − 1) with monthly rate r and month count n. This is the same math banks use for every fixed-rate loan.
Typical terms by purchase type
| Loan type | Typical rate | Typical term | Key angle |
|---|---|---|---|
| Motorcycle | 6-12% | 3-5 years | Depreciates fast; short terms dominate |
| RV | 6-9% | 10-20 years | Big ticket, long terms, lots of interest |
| Boat | 6-11% | 10-20 years | Used boats carry higher rates |
| Solar | 4-8% | 10-25 years | Compare against your electric bill |
| Home improvement | 6-12% | 5-15 years | Fixed personal loan, no collateral needed |
| Small business | 7-15% | 3-10 years | Cash-flow view; often floating |
Motorcycle loans
Motorcycles depreciate fast, so lenders keep terms at 3-5 years and charge higher rates than cars. Use the typical 6-12% range above when planning a bike purchase.
RV loans
RVs are big tickets with long terms — 10 to 20 years at many lenders. The stretched term multiplies interest, so run the numbers before committing to the longest plan.
Boat loans
Boat loans run 10-20 years and used boats carry higher rates, like used cars. Model the payment against the full cost of ownership, including mooring and maintenance.
Solar loans
Compare the solar payment against your old electric bill: if the payment is below it, you are cash-flow positive from month one. Solar loans often run 10-25 years at low rates.
Home improvement loans
Home-improvement loans are fixed personal loans with 5-15 year terms. Weigh the payment against the value the renovation adds to the home.
Small business loans
Business term loans are evaluated against monthly cash flow, and rates vary widely by lender and risk. Business loans are often variable — model a rate a point or two above today quote.
Fixed rate loans
A fixed rate keeps the payment identical for the whole term, which makes budgeting easy. That certainty is the reason fixed-rate loans usually cost slightly more.
Variable rate loans
A variable rate starts lower but can rise when the index moves. Treat the number you get as a floor, not a ceiling, and budget for a higher payment later.
Vehicle loans: shorter terms
Motorcycles, RVs and boats are depreciating assets, so lenders keep terms shorter than homes. A longer term on a depreciating asset can leave you owing more than it is worth.
Home and business loans: the payoff angle
Solar and home-improvement loans are evaluated differently: you compare the payment against the value created (lower electric bills, higher home value). A small business weighs the payment against cash flow — and business loans are often variable-rate, so model a rate a point or two above today's quote.
Fixed vs variable rates
A fixed rate keeps the payment identical for the whole term, which makes budgeting easy. A variable rate starts lower but can rise when the index moves; treat the number you get as a floor, not a ceiling.
FAQ
Is this the same as an auto loan calculator?
The math is identical. The auto page adds price, down payment and trade-in fields; this page works from the financed amount directly for any loan type.
What is a typical motorcycle loan term?
Three to five years is common; rates run higher than cars because bikes depreciate and are riskier collateral.
How long can an RV loan be?
Ten to twenty years at many lenders, but the long term multiplies interest — see the formula above.
Should I compare a solar loan against my bill?
Yes — if the monthly payment is below your old electric bill, you are cash-flow positive from month one.
Fixed or variable — which is safer?
Fixed for certainty; variable only if you can absorb a higher payment later.
Does a small business loan use the same math?
Yes, though business rates vary widely and may float. Model the payment against your monthly cash flow.
Reviewed by the LoanMath editorial team