Finance

Personal Loan Calculator

Personal loan monthly payments, decoded.

Shopping for a personal loan? Enter the amount you want to borrow, the annual rate you're offered and the repayment term to see your exact monthly payment. Compare two or three offers here before you apply — the cheapest monthly payment isn't always the cheapest loan.

Introduction

A personal or auto loan quote boils down to three numbers: how much you borrow, the annual percentage rate (APR), and the term in months. The monthly payment comes from the standard amortization formula — the same one behind EMIs and mortgages — and the total interest is simply (payment x months) minus the amount borrowed. Longer terms always lower the payment and raise the total interest; there is no free lunch, only a trade-off between monthly comfort and total cost. A 60-month loan feels easier than a 36-month loan every month, right up until you add up what you paid.

Shop on APR, not on the monthly payment: dealers and lenders can stretch a term to make any payment look affordable while quietly adding thousands in interest. The APR is the standardized cost measure — it must include most fees by law in many jurisdictions, which is what makes it comparable across lenders. Check whether the rate is fixed or variable, whether there are origination fees or prepayment penalties, and above all what the total cost of the loan is — that single figure is the honest price tag. For auto loans specifically, compare the loan's total interest against paying cash or buying a cheaper car: cars depreciate while loan interest compounds against you, so a long loan on a fast-depreciating car can leave you 'underwater' — owing more than the car is worth — for years. Never finance add-ons (extended warranties, paint protection) into the loan at dealership rates; they inflate the principal that every month's interest is charged on.

How it's calculated

Uses the standard reducing-balance EMI formula: payment = P × r × (1+r)^n / ((1+r)^n − 1), with r the monthly rate and n the term in months.

Worked examples

$25,000 auto loan at 7.5% APR for 60 months

Monthly rate r = 0.075/12 = 0.00625, n = 60. Payment = 25,000 x 0.00625 x (1.00625^60) / (1.00625^60 - 1). Since 1.00625^60 = 1.45329, payment = 156.25 x 1.45329 / 0.45329 = $500.95. Total repaid: 500.95 x 60 = $30,057, so interest costs $5,057 — about 20% on top of the car's price. First-month interest alone is 25,000 x 0.00625 = $156.25, nearly a third of the payment.

The same loan over 36 months

Payment = 25,000 x 0.00625 x (1.00625^36) / (1.00625^36 - 1) = 156.25 x 1.25145 / 0.25145 = $777.66. Total repaid: 777.66 x 36 = $27,996 — interest of only $2,996. Paying $276.71 more per month saves $5,057 - $2,996 = $2,061 in interest and clears the debt two full years sooner. The breakeven question: if you can invest the $276.71 monthly difference at more than 7.5% reliably, the longer loan wins mathematically — but few borrowers actually invest the difference, which is why the shorter term usually wins in practice.

Frequently asked questions

Personal loan vs credit card — which is cheaper?

Personal loans almost always win: typical rates are 8–15% versus 20%+ on credit cards, and the fixed term forces the balance to zero. Run both scenarios through the debt payoff calculator to compare.

Does applying hurt my credit score?

A single hard inquiry dings your score slightly and temporarily. Rate-shopping multiple lenders within a short window (usually 14–45 days) is typically counted as one inquiry by scoring models.

What fees should I watch for?

Origination fees (1–8% of the loan), late fees and prepayment penalties can dwarf rate differences. This calculator shows the payment on the amount borrowed — add fees to the principal for the true picture.

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References