Buy Now, Pay Later: What It Really Costs (Even at 0% Interest)
Split payments are not free just because the interest rate is zero. We look at the fees, the credit implications and the behavioural cost nobody puts on the checkout button.
Buy-now-pay-later buttons now sit next to the card field on most checkouts. The pitch is simple: four payments, no interest. For disciplined shoppers making a planned purchase it can be a reasonable tool. For everyone else, the costs are real – they are just not called interest.
The visible costs
- Late fees. Missed instalments typically trigger a flat fee, often capped as a percentage of the order. On a $100 order, two late fees can equal a 20% APR.
- Longer plans charge interest. The 0% headline applies to short plans (usually 6-8 weeks). Plans of 6-36 months carry APRs comparable to credit cards.
- Returns friction. Refunds route through the BNPL provider. Until the merchant confirms the return, instalments may continue to be collected.
The invisible costs
The merchant pays the provider 3-6% of each order – roughly double a card fee. That cost is built into prices across the board, which means shoppers who pay upfront subsidise those who split. More importantly, the research on this is consistent: offering split payments increases average order values by 20-40%. The product is not finance. The product is you spending more.
Credit implications
This varies by provider and country, and it is changing. Some providers now report to credit bureaus; some run a soft check at sign-up and a hard check for longer plans. Multiple concurrent plans can affect affordability assessments for mortgages and loans even where they do not appear as formal credit. If you are planning a major credit application in the next year, keep BNPL use minimal.
When it is a sensible choice
- The purchase was planned and budgeted before you saw the button.
- You can afford the full price today and are simply smoothing cash flow.
- The plan is genuinely 0% and short, and you have set calendar reminders for every instalment.
- You are not combining it with other plans.
The cheaper alternative, most of the time
A verified coupon code. A 15% code applied once beats most of the convenience of splitting a payment, and it costs nothing afterwards. If you need the time, wait for the sale and use the code – items that are on sale today are rarely gone next month.