关于采用Payment Gateway的电商APP交易手续费收取方的技术问询

Hey there! Great question—this is one of the most common points of confusion when navigating e-commerce payment flows. Let’s break it down clearly:

Core Principle: No Universal Rule #

Who covers payment gateway fees depends entirely on the agreement between the e-commerce platform, the merchant, and sometimes the user. But there are two dominant models you’ll encounter:

1. Merchant Pays (Most Common Scenario) #

This is the standard setup for nearly all mainstream e-commerce apps. Here’s how it works:

• Payment gateways provide a service that lets merchants accept online payments, so the fee is treated as a normal cost of doing business for the merchant.
• When a user completes an order, the total transaction amount goes through the gateway, and the fee is deducted directly from the merchant’s payout. For example: if a user pays $100 and the gateway fee is 2%, the merchant receives $98.
• Fees are usually structured as a percentage of the transaction (1%-3% is typical) plus a small fixed per-transaction fee (e.g., $0.30 per payment). Rates can vary based on payment method (credit vs. debit card), transaction volume, or whether it’s a domestic or international payment.
• Some merchants may indirectly pass this cost to users by slightly raising product prices, but the formal responsibility for the fee stays with the merchant.

2. User Pays (Less Common, But Permissible) #

In specific cases, fees can be passed directly to users—but only if this is fully disclosed upfront. Examples include:

• Small businesses or niche platforms where low transaction volumes make merchant-absorbed fees unsustainable.
• Cross-border transactions where international payment fees are significantly higher.
• The app must explicitly show the fee as a separate line item at checkout (e.g., "Payment Processing Fee: $2.00") or include it in the total order amount with clear labeling. Hidden fees often violate consumer protection regulations in many regions.

Key Notes for Merchant-Paid Scenarios #

Since your question cut off mid-thought, here are critical considerations if the merchant is covering the fees:

• Negotiate rates: High-volume merchants can often negotiate lower fees with payment gateways or e-commerce platforms.
• Watch for extra costs: Some gateways charge additional fees for services like instant payouts, chargeback handling, or currency conversion—these are separate from standard transaction fees.
• Check platform rules: Major e-commerce platforms (like Shopify or WooCommerce-integrated gateways) often have pre-set terms where merchants are responsible for gateway fees, so always review your platform’s fine print.

内容的提问来源于stack exchange，提问作者Hugo Barona