Calculator

Shop Pay Installments Calculator

Shop Pay Installments can lift conversion and AOV, but Shopify says it also carries a higher transaction fee than standard Shopify Payments checkout. This calculator helps you compare that trade-off on a real order instead of treating BNPL as free.

Compare standard checkout against Shop Pay Installments
See incremental fee drag on the same order
Judge whether the BNPL uplift still leaves healthy gross profit

Calculate Shop Pay Installments drag

Enter the order value, product cost, fulfilment cost, your standard checkout fee rate, and the effective Shop Pay Installments fee rate you see in your Shopify admin. Shopify says the specific installment rates and fees are available inside the admin, so keep those values matched to your store.

Order value Gross order value before payment drag. Product cost Direct product or COGS for the order. Fulfilment cost Shipping and pick-pack cost for the order. Standard checkout fee rate % Your non-installments payment rate baseline. Standard fixed fee Fixed fee for standard checkout on the same order. Shop Pay Installments fee rate % Use the effective installments rate from your Shopify admin. Shop Pay Installments fixed fee Keep this matched to your live Shop Pay Installments fee structure.

Three Shop Pay Installments scenarios.

Formula

What the installments comparison shows

Incremental BNPL drag = Shop Pay Installments fee - Standard checkout fee

Shopify says merchants are charged a higher transaction fee when a customer uses Shop Pay Installments and that the specific rates are available in the Shopify admin. That makes the key question simple: does the order convert or expand enough to justify the incremental drag?

Where BNPL gets misread

Teams celebrate higher AOV without measuring the extra payment drag.
They compare installments adoption without checking retained gross profit.
They treat BNPL as a growth lever instead of a trade-off that needs math.

Useful next step

Once the installments delta is clear, compare it against Shopify fees and payout margin to see whether the uplift still leaves a healthy order after operations.