BNPL Fee Calculator

A BNPL (Buy Now Pay Later) fee calculator is a financial tool that calculates the total cost of using installment payment services at checkout. It takes the purchase amount, the BNPL provider (Afterpay, Klarna, Affirm, PayPal Pay in 4, or Zip), the number of installments, the installment frequency, any interest or fees, late payment fees, and merchant fees. The BNPL fee calculator produces the per-installment amount, total payments, total fees, and the APR equivalent - the annualized cost of the BNPL plan. It supports comparing multiple providers side-by-side to find the best option. Everything runs entirely in your browser with no data uploaded to any server.

1. Enter Your Purchase Details: Input the total purchase amount and select one or more BNPL providers you want to compare. Each provider has default settings - Afterpay typically offers 4 bi-weekly installments with no interest, while Affirm offers 3-36 month terms with interest. You can customize the installment count and frequency for each provider.
2. Configure Fees & Terms: For each selected provider, set the number of installments (2-12), the installment frequency (weekly or monthly), any fixed interest amount or interest rate, late payment fee for missed payments, and expected number of late payments. You can also add a merchant fee percentage to see the cost from the business perspective.
3. Review the Complete Comparison: The calculator displays a side-by-side comparison of all selected providers showing per-installment amounts, total payments, total fees, APR equivalent, and a detailed payment schedule for each plan. The APR equivalent calculation converts the total fees into an annualized percentage, revealing the true cost of borrowing through each BNPL provider.

• Per-Installment Amount: The amount due each payment period for each BNPL provider. This is calculated by dividing the total purchase amount plus any fees by the number of installments. Lower per-installment amounts mean more manageable payments but potentially more payments overall.
• Total Payments & Total Fees: The sum of all installment payments (the total amount you will actually pay) compared to the original purchase amount. The total fees show the extra cost of using the BNPL service, including any interest, account fees, and late payment penalties.
• APR Equivalent: The annualized percentage rate that represents the true cost of the BNPL plan. This is the most important metric for comparing BNPL plans to credit cards and other financing options. A 0% interest BNPL plan with no fees has a 0% APR equivalent, while plans with fees can have surprisingly high effective APRs.
• Payment Schedule: A detailed schedule showing each installment due period, the amount due, the running total paid, and the remaining balance. This helps you plan your payment calendar and understand exactly when each payment is due for each BNPL provider.

The BNPL fee calculator is 100% free with no signup required. All calculations are performed locally in your browser - your purchase amounts, fees, and payment details never leave your device. There are no usage limits or restrictions. The tool supports all major BNPL providers with customizable settings, late fee modeling, merchant fee analysis, and APR equivalent calculations. Use it as many times as you need to compare BNPL options, plan your installment payments, or understand the true cost of buy now pay later services.