FlexiFeesBlog
Guides for Shopify merchants who need to charge more than the product price. Every app setting named here is the label you will see in FlexiFees, and every rule about fees links to its official source.
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Fees for a Whole Product Category on Shopify, Without Tagging Every Product
Charge a deposit on all beverages or a recycling fee on all batteries by using Shopify's product category field instead of tags or lists. How it works, and when tags are still better.
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Fees per Pouch, per Gram or per Milliliter on Shopify: Using Metafields
When a fee is set per unit of something Shopify has no field for, store the number in a metafield. How to charge per pouch, per gram of sugar or plastic, or a percentage of a stored price.
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How to Charge a Fee by Weight on Shopify (per kg, lb or oz)
Shopify's weight-based shipping rates change the shipping price. To add a separate weight surcharge or a per-ounce fee as its own line, use a weight fee. Setup, tiers and pitfalls.
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What's New in FlexiFees: Formula Fees, Per-Weight Rates, Metafield Amounts, Product Categories
The September 2026 FlexiFees release: write fees as formulas, charge per kg, g, oz or lb, take amounts from metafields, and target whole Shopify product categories.
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How to Add a Fee to a Shopify Order: 7 Ways Compared
Shopify has no setting that adds a fee to online orders. The seven workarounds, from shipping handling fees to fee apps, and which ones show the fee as its own line.
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Shopify Scripts Are Gone: How to Charge Fees and Surcharges Now
Shopify Scripts stopped running on June 30, 2026. What they could and could not do for fees, how to find the Scripts your store used, and what replaces a surcharge today.
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Which Fees Must Be Shown Separately at Checkout? 4 US State Rules
Colorado and Minnesota delivery fees, the California tire fee and CRV: what each state requires on the receipt, and how to set the fee up on Shopify.