WooCommerce Payment Gateway Fees and Margin Math

Stripe, PayPal, and local gateways change contribution margin. How Woo stores should model all-in payment cost.

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WooCommerce has no single payment fee. Merchants choose their own gateway mix, which makes it a pricing and margin decision rather than a fixed cost to accept passively.

Why Woo has no single fee

Stripe, PayPal, and local processors each carry different percentage, fixed, and cross-border fee structures. Running several gateways side by side—common for conversion reasons—means the blended cost per order depends on how volume actually splits between them.

Modeling blended cost

Weight each gateway's fee by its share of transaction volume, and track dispute and chargeback fees separately—they vary sharply by processor and by product category, and a gateway with a lower headline rate can still cost more once disputes are included.

When to renegotiate or switch

Once volume crosses a processor's next pricing tier, or once dispute rates justify paying a higher headline rate for stronger fraud tooling, it is worth re-running the blended cost model rather than assuming last year's rate still applies.

FAQ

Should currency conversion fees be modeled separately?

Yes—cross-border and FX fees often exceed the base processing rate for international WooCommerce orders and deserve their own line in the margin model.

Do buy-now-pay-later gateways change the math?

Yes. BNPL options typically carry a higher percentage fee in exchange for AOV lift—measure the net effect on contribution margin, not conversion rate alone.

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CostRadar pulls gateway fees into the same cost ledger as COGS and shipping, so a multi-gateway WooCommerce stack still produces one clear contribution margin number.