Fixed payment estimate
Free business loan calculator
Enter loan principal, annual interest rate and term to estimate the monthly payment, total paid and total interest for a fixed-rate amortizing loan.
Free, no sign-up, and the entered values stay in your browser.
Formula
How the calculation works
Enter loan principal, annual interest rate and term to estimate the monthly payment, total paid and total interest for a fixed-rate amortizing loan.
Payment = principal × monthly rate × (1 + rate)^months ÷ ((1 + rate)^months − 1).This estimate excludes lender fees, compounding differences, variable rates, balloon payments, taxes, insurance and other loan terms.
Use the result
Move from calculation to a customer document.
Confirm the measurements, rates, tax treatment and project scope before relying on an estimate. Keep the calculation with the customer record, then place the verified figures in an itemized estimate, quote or invoice.
These browser calculations support planning and pricing. They do not replace field measurements, supplier quotations, payroll, accounting, tax, lending or professional advice.
Frequently asked questions
Questions about free business loan calculator
Is the entered interest rate the same as APR?
Not always. APR may include certain fees, while the calculator applies the entered annual rate directly to a standard monthly amortization formula.
Does this support interest-only or balloon loans?
No. It estimates equal monthly payments for a fully amortizing fixed-rate loan.
Why can a lender quote a different payment?
Fees, payment timing, day-count rules, compounding, insurance, variable rates and rounding can change the lender's result.
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