How to enable 'Cost on Product Subtotal’ extra fee rules and set quantity limits?

The 'Cost on Product Subtotal' rule allows you to apply extra fees based on the subtotal of specific products in the cart. This helps you charge additional fees according to the total spend on certain products, offering flexibility for things like packaging fees, handling costs, or tiered service charges.

How it works

• The plugin checks the subtotal of selected products (before tax and shipping).
• You can set different fee amounts based on subtotal ranges (e.g., $0–$100, $101–$200, etc.).
• The fee applies automatically at checkout when the subtotal meets your defined range.
• You can also set subtotal limits to apply the rule only when the cart meets specific subtotal conditions.

Steps to configure

Step 1: Enable the extra fee rules

1. Go to WooCommerce → Extra Fees Plugin → Add New Fee Rule.
2. Enter a title/name for your fee (example: Packaging Fee).
3. Under Apply Fee On, select “Cost on Product Subtotal” from the dropdown.

Step 2: Set subtotal-based extra fee limits

1. Go to the “Cost on Product Subtotal” section.
2. Set the Minimum Subtotal (example: $5 → fee applies only if customer buys an order under $100).
3. Set the Maximum Subtotal (example: $20 → fee applies only if customer buys an order above $100).

Step 3: Set the fee amount

Enter the Fee Amount (example: $20 for a specific product subtotal range).

Step 4: Save and test

1. Click Save Rule.
2. Go to your store and add products to the cart.
3. Check that the fee is applied once the product quantity meets the set limit.

Example 1: Packaging Fee for 'Eco Water Bottle'

• Product: Eco Water Bottle
• Price: $15 per unit

Example 2: Processing Fee for 'Premium Yoga Mat'

• Product: Premium Yoga Mat
• Price: $50 per box

Rule: Apply a $50 processing fee if customers purchase products in bulk

This feature helps you implement dynamic extra charges based on how much customers spend on specific products, improving cost coverage and offering more pricing flexibility.