How to add product specific additional quantity based shipping

This is helpful when you want to cover the incremental cost of shipping multiple units of the same product.

Product-specific, additional quantity-based shipping lets you add extra shipping fees for each additional unit of a product in the cart.

For example:

• Base shipping = $10 for the first T-shirt.
• Add $2 for each additional T-shirt.

Why use product-specific, additional quantity-based shipping?

• Fair pricing: Customers pay proportionally for extra items instead of one flat fee.
• Protect margins: Cover increased shipping and packaging costs.
• Encourage bulk orders smartly: You can keep the additional fee small to promote multiple purchases.
• Flexibility: Apply these rules only to selected products (not store-wide).

Configuration steps

1. Add a new shipping method

• Go to Dashboard → Dotstore → Flat Rate Shipping.
• Click Add New Shipping Method.
• Give it a descriptive name, such as “Product Quantity-Based Shipping”.

2. Set additional quantity charges

• In the charge field, use a formula login to add fees based on specific product quantity.

  Example formula:

  • 10 + (2 * ([qty] - 1)) - You need to use the setting option here.

    

  • Explanation: $10 base shipping + $2 for every additional item beyond the first.

3. Create a product-specific rule

• Edit the shipping method and go to the Shipping Rules tab.
• Click Add New Rule.
• From the Condition dropdown, select Product.

• Choose the product (e.g., Helena Hooded Fleece).

  

4. Save and test

• Click Save Changes.
• Add the product to your cart and increase the quantity.

• Shipping cost will update according to your rule.

  

Two real examples

Example 1: T-shirt with $2 per extra unit

• Rule: First T-shirt = $10 shipping; each additional = $2

  Checkout Result:

  • 1 T-shirt → $10 shipping
  • 3 T-shirts → $10 + (2×2) = $14 shipping
  • 5 T-shirts → $10 + (2×4) = $18 shipping

Example 2: Coffee mug with $5 per extra unit

• Rule: First mug = $8 shipping; each additional = $5

  Checkout Result:

  • 1 mug → $8 shipping
  • 2 mugs → $8 + (5×1) = $13 shipping
  • 4 mugs → $8 + (5×3) = $23 shipping

Expected outcome

Once configured, WooCommerce will apply shipping charges that increase based on the quantity of a specific product. This ensures shipping costs are fair, transparent, and directly tied to the number of items purchased.