Buy Now Pay Later Calculator
See what an instalment plan really costs, including fees, late-fee scenarios and the implied annual rate.
Quick answer
Buy now pay later splits a price into equal instalments. Its true cost is the periodic rate that equates the amount financed to the payments, annualised, so even a small fee over a few weeks becomes a high yearly rate.
Buy Now Pay Later Calculator
Amount Financed
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Each Instalment (incl. fee)
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Total Paid
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Cost of Credit
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Implied APR
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Effective Annual Rate
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Total Paid if Late
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Implied APR if Late
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Payment Schedule
| Payment | Principal (₹) | Fee (₹) | Total (₹) | Left to Finance (₹) |
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Assumptions & method
- Amount financed = price − upfront payment. Each instalment = amount financed ÷ number of instalments, plus the fee.
- Cost of credit = all fees (and late fees in the scenario). Total paid = upfront + all instalments.
- Implied APR: the periodic rate r solves financed = Σ payment_k ÷ (1 + r)^k, found by bisection; APR = r × payments per year. Effective annual rate = (1 + r)^(payments per year) − 1.
- Late scenario: late fee × missed instalments is added to the last payment. Real plans charge late fees when each payment is missed.
- Interest, service charges not entered as fees, and effects on credit records are not included. Results are estimates, not advice.
Results are estimates based on the figures you enter. They are not guarantees and not financial advice.
The cost of splitting a purchase
Buy now, pay later splits a price into a few equal instalments, often with a payment up front. When the instalments just add up to the price, the plan costs nothing extra. Fees change that. Because you hold the money for only weeks or months, even a modest fee equals a large percentage when expressed per year. To compare fairly, this calculator treats the plan as a loan: it solves for the rate that equates the amount financed with the payments, then annualises it. It also shows what a late fee would add.