SamCalculator

Monthly Loan Payment Calculator

Calculate your monthly loan payment or find out exactly how long it takes to repay any installment loan.

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See your monthly payment, payoff date, total interest, and full repayment breakdown.

What is a Monthly Loan Payment?

A monthly loan payment — also called an installment payment, loan payment, or EMI (Equated Monthly Installment) in some markets — is the fixed amount you pay your lender each month until the loan is fully repaid. Each payment covers the interest charged for that month plus a portion of the original principal. In the early months, most of your payment goes toward interest. Over time, the principal portion grows — this is called an amortizing loan.

Whether you're modeling a mortgage, auto loan, student loan, or unsecured personal loan, understanding your monthly payment is the first step in deciding how much you can comfortably afford and how to structure repayment.

How is the monthly loan payment calculated?

M = P × r × (1+r)ⁿ / ((1+r)ⁿ − 1)

Where M is the monthly payment, P is the principal loan amount, r is the monthly interest rate (annual APR ÷ 12 ÷ 100), and n is the total number of monthly payments.

For example, a $50,000 loan at 10% APR over 5 years: r = 10 ÷ 12 ÷ 100 = 0.00833, n = 60. Monthly payment ≈ $1,062/month.

How to lower your monthly loan payment

Lower the rate

Negotiate a better APR, improve your credit score, or refinance with a lower-rate lender. Even a 1% rate difference can save thousands over the life of the loan.

Extend the term

Spreading payments over more months lowers each individual payment — but increases total interest paid. Use the sensitivity table above to compare exactly.

Reduce the principal

A larger down payment directly reduces what you finance. Less principal means a lower monthly payment and far less interest over the life of the loan.

Fixed Term vs Fixed Payment

Fixed Term

You know the loan duration and want to find the monthly payment. Best when you have a deadline (like a 5-year car loan) and need to know what the payment will be.

Fixed Payment

You know how much you can afford each month and want to know how long repayment takes. Best when budgeting around a specific cash flow constraint.

Frequently Asked Questions

Three inputs dominate: loan amount, APR, and term. A larger principal raises the payment proportionally; a higher APR raises both the payment and the total interest paid; a longer term lowers each payment but increases the total interest. The Interest Rate Sensitivity table on this page shows exactly how each of these levers move your specific payment.

Use Fixed Term when you have a target deadline (a 5-year auto loan, a 30-year mortgage) and want the exact monthly payment. Use Fixed Payment when you know how much you can spare each month and want the calculator to tell you how long the loan will take to repay at that amount.

Every dollar above your scheduled payment hits principal directly — so next month's interest is charged on a smaller balance, and so on. On a $50,000 loan at 10% APR over 5 years, adding even $100 extra per month typically shaves several months off the term and saves four-figure interest. The Extra Monthly Payment field on this page returns your exact savings.

The math here is the standard amortization formula used by every U.S. and international lender. The number you see should match a lender quote to within a few cents of rounding. Differences usually come from variable rates, fees rolled into the loan, or a different day-count convention (e.g. 360 vs 365). Always compare against the lender's Truth-in-Lending disclosure.

The fixed payment is the total cash that leaves your account each month — that doesn't change. But the lender charges interest on the remaining balance, which shrinks every payment. So in month 1, most of the payment is interest; by the final payment, almost all of it is principal. The amortization schedule on this page shows the exact split for every period.

The interest rate is the raw cost of borrowing. APR (Annual Percentage Rate) adds most lender fees rolled into the financing. For a simple installment loan with no points or origination fees, they're essentially identical. When comparing offers, always compare APR-to-APR — that's the apples-to-apples figure required by U.S. disclosure rules.

Yes — the math is the same closed-form amortization formula used for personal, auto, student, and mortgage loans. For tax + insurance escrow on a home, use our mortgage calculator. For trade-in and sales-tax math on a vehicle, use the auto loan calculator. This page is the right tool for any fixed-rate installment loan without escrow.

An amortization or payment schedule is the full month-by-month breakdown of every payment over the life of the loan — payment, principal portion, interest portion, and the remaining balance after each. Open the Payment Schedule section above to view the complete schedule for your inputs.

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