📊 Installment Calculator

An installment calculator figures out your monthly payment when you split a purchase into equal parts. Enter total amount, number of months, and interest rate (0% for promotional offers). Get the exact monthly payment and total cost instantly.

Real-world example: A $2,000 laptop financed at 0% over 12 months = $167/month, no extra cost. Same laptop at 20% APR over 24 months = $102/month, total = $2,441 — you pay $441 in interest. Choose the shortest term you can afford.

Installment plans are offered by retailers (Best Buy, Amazon, Apple), BNPL services (Klarna, Afterpay, Affirm), and banks through credit cards with installment features. Each has different terms, fees, and credit impact — compare before choosing.

The 0% trap: Many store cards offer 'deferred interest' not '0% APR'. The difference: with deferred interest, missing even one payment means all back interest (from day one) is added at 20-30%. With 0% APR, only the remaining balance accrues interest.

Related: Use our Loan Calculator to compare installment plans against personal loans. The Mortgage Calculator shows the same math for home loans. The Compound Interest tool shows what your money could earn if invested instead of spent on interest.

Smart strategy: Before financing a purchase, calculate the total cost with our calculator. If the total interest exceeds 10% of the purchase price, consider saving up instead. If it's 0%, go ahead — just don't miss a payment.