Instalment checkout options are marketed to shoppers as interest free, which raises the question of who pays for them. In the standard arrangement the retailer does.
The retailer absorbs the fee, not the shopper
The provider pays the merchant the purchase amount up front, minus a percentage fee, and then collects the instalments from the customer over the following weeks.
That fee is typically several times what the same sale would cost through an ordinary card transaction. The merchant accepts it as a cost of conversion.
Because the shopper sees no interest and no fee, the pricing is invisible at the point of sale, which is precisely what makes the option attractive to use.
Why a retailer accepts a much higher rate
The argument for paying it rests on basket size and completion. Splitting a payment lowers the immediate outlay, and shoppers who would have abandoned a cart often complete the purchase.
Retailers also report larger average orders, since a monthly figure anchors the decision rather than the full price. The instalment reframes what the purchase feels like.
Whether the extra margin covers the fee depends entirely on the category. High-margin goods absorb it comfortably; thin-margin categories generally cannot.
The provider is taking on the credit risk
Once the merchant is paid, non-payment is the provider's problem. It has effectively underwritten a short unsecured loan to a customer it approved in seconds.
That approval relies on thin signals — the order details, the device, prior repayment behaviour with the same provider — rather than a full credit assessment.
The fee therefore prices two things together: the service to the merchant and the expected losses across the whole book of approved customers.
Returns and disputes complicate the settlement
When goods are returned, the merchant refunds the provider, which then unwinds the customer's remaining instalments. The reconciliation is more involved than a simple card refund.
Partial returns are harder still, because an instalment schedule has to be recalculated mid-flight rather than simply cancelled and reissued.
Merchants with high return rates in categories such as apparel find this operational cost material, and it is rarely included in the headline fee comparison.
Where the economics become fragile
The model depends on cheap funding and low default rates at once. Providers borrow to pay merchants immediately, so their cost of capital sits directly in the margin.
When borrowing costs rise or repayment quality deteriorates, the fee charged to merchants has to rise with them, and the conversion argument weakens.
That pressure is why instalment products increasingly carry longer terms with visible interest, which moves the cost back onto the customer where a conventional lender would put it.