Fixed-rate installment loan

Loan Calculator

Calculate the monthly payment and total cost of an ordinary fixed-rate installment loan without mortgage-specific taxes, insurance, HOA, or PMI assumptions.

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Fixed-payment formula

For monthly rate r, amount P, and n payments: payment = P × r ÷ (1 − (1 + r)−n). At exactly 0%, payment = P ÷ n.

Example: $10,000 at 5% for 36 months produces a monthly payment of about $299.71.

Model boundary

This page models an ordinary fixed-rate, fully amortizing installment loan. It does not add origination fees, balloon payments, variable rates, interest-only periods, mortgage taxes, insurance, HOA, or PMI.

Reading the schedule

Each yearly row totals principal and interest from the underlying monthly schedule. Calculations retain unrounded internal balances and normalize only a tiny final floating-point residual to zero.

Results are general calculation estimates. Actual agreements may use different fees, timing, day-count conventions, or rounding rules.

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