Credit Cards
Buy Now, Pay Later Calculator
Pay-in-four is genuinely free when every payment lands on time. The cost hides in two places: late fees, which are small in dollars but enormous as an annual rate over a few weeks, and the interest on longer plans that quietly work like ordinary loans.
Pay-in-four is 0%. Longer financed plans (e.g. 6–24 months) charge interest.
Extra cost beyond the price
$8
Late fees and any interest, on top of what you bought.
An $8 fee looks trivial next to the purchase, but as an annual rate on the amount financed it works out around 26% — worse than almost any credit card. BNPL is only free if you never slip.
- Each payment
- $50
- Late fees
- $8
- Interest
- $0
- Total you pay
- $208
- Late fees as an annual rate
- 26%
What those fees would be if charged as interest for a year.
How this calculator works
Each payment is the purchase divided by the number of installments. Late fees are the per-miss fee times the number of missed payments. For interest-bearing plans, the cost is a standard amortisation over the plan length at the rate entered, minus the purchase. The effective rate expresses the late fees as a share of the purchase, annualised over the plan's total weeks.
The annualised fee rate is a simple proportion, not a formal APR calculation, and is meant to convey scale rather than a regulatory figure. Overdraft fees on a linked bank account, credit-report effects, and the behavioural cost of overspending are real but not modelled.
Try an example
Frequently asked questions
Is Buy Now, Pay Later free?
Classic pay-in-four is genuinely free when every payment is on time — no interest, no fee. The provider earns from the merchant, not you. The cost appears only if you miss a payment, or if you use a longer financed plan that charges interest like a normal loan.
How bad are BNPL late fees?
Small in dollars, huge as a rate. An $8 fee on a $50 payment due in two weeks is a 16% charge over 14 days — well over 400% annualised. The dollar amount is designed to look harmless while the effective rate rivals a payday loan.
Does BNPL affect my credit score?
Increasingly, yes. Several providers now report to credit bureaus, so on-time payments can help and missed ones can hurt. Even where they do not report, a missed payment can be sent to collections, which does appear on your credit file.
Is BNPL better than a credit card?
For a one-off purchase you will pay off on schedule, the 0% plan beats carrying a credit-card balance. But a credit card paid in full each month is also free and builds credit and rewards. BNPL's real risk is that it encourages spending you would not otherwise do.
What happens if I miss a BNPL payment?
Depending on the provider: a late fee, suspension from using the service, a report to a credit bureau, or referral to collections. Some pause your account until you catch up. Because payments come out automatically, the usual cause is an overdrawn linked account — which can trigger a bank overdraft fee on top.
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Disclaimer: DayCents provides this calculator for educational purposes only. Results are estimates based on your inputs and the stated assumptions — they are not financial advice, a quote, or an offer of credit. Consult a qualified financial professional before making major money decisions.