Add a Payment Method Surcharge on Shopify

How Payflow solves this

• Add a visible fee to any payment method without editing orders post-purchase
• Uses the same shipping-rate approach as COD fees — proven and reliable
• Customers see the fee clearly at checkout before completing their order

Setup

1. 1

   In Shopify admin → Settings → Shipping and delivery, create a shipping rate with the fee (e.g. Standard + Tabby fee: $3).

2. 2

   Rule 1 — Hide the payment method when the fee rate is not selected: Shipping method name → Is not any of → the fee rate title. Hide the target payment method.

3. 3

   Rule 2 — Hide other methods when the fee rate is selected: Shipping method name → Is one of → the same fee rate title. Hide → Does not contain text → a substring unique to your method.

4. 4

   Active, Save both rules, and verify at checkout.