How WooCommerce Category Commissions Work Under the Hood

The Core Problem: Flat Rates vs. Catalogue Reality

WooCommerce organises products into categories for merchandising, but native WooCommerce lacks affiliate commission logic tied to those groupings. Without category-aware rules, store owners face a choice: apply a blunt global percentage that ignores cost structures, or manually override rates for every SKU, a maintenance nightmare as the catalogue grows.

A plugin like Affiliate Engine solves this by injecting commission controls directly into WooCommerce's category edit screens. This approach leverages existing taxonomy rather than reinventing it, ensuring that merchandising and affiliate logic stay aligned. The key innovation isn't just where the settings live, but how they interact: category rules cascade with product-level overrides, role-based tiers, and global defaults, all governed by a configurable priority system.

Architecture: Taxonomy-Driven, Priority-Aware

The plugin doesn't replace WooCommerce's category system; it extends it. When a product is added to a cart, the commission engine evaluates all assigned categories, checks for conflicts (e.g., a product in both