FlexiFeesGetting started
Install the app, switch on the app embed, and publish your first fee in a few minutes.
Documentation
Everything you need to build conditional fees on Shopify: from your first rule to the full condition reference.
Start here
How fees appear at checkout
Where customers see your fee, how taxes and discounts apply, and how multi-currency stores behave.
Buy Now guard
Make sure express checkout cannot skip a legally required fee.
Fee types
Fee types overview
The seven fee types compared, and when to use a cart fee or a per-product fee.
Fixed fee
A flat amount per order or per matching item. Deposits, delivery fees, service charges.
Percentage fee
A share of the discounted subtotal or of matching products. Surcharges and tariffs.
Cost-based fee
A percentage of your cost per item (COGS) instead of the retail price.
Per weight fee
A rate per kilogram, gram, ounce, or pound of the cart or of matching products.
Per unit of metafield
A rate times a number you store per product: per pouch, per gram, per milliliter.
Percentage of metafield
A percentage of an amount you store per product, such as a wholesale price.
Formula fee
Write the calculation yourself. Variables, functions, and eight worked examples.
Metafields in FlexiFees
Accepted value types, the definition picker, and how to check a product's value.
Conditions
All 35 conditions A to Z
The complete reference table with a real-world example for every condition.
Product conditions
Tag, collection, type, vendor, SKU, barcode, HS code, origin, metafields, and more.
Product category
Fees for a whole category from Shopify's product taxonomy, subcategories included.
Pickers and autocomplete
Choose products, variants, collections, countries, and states from lists.
Cart conditions
Subtotal, weight, quantity, discount codes, subscriptions, gift cards, markets.
Customer conditions
Country, state, tags, login status, lifetime orders, and lifetime spend.
Date & time conditions
Day of week, date ranges, and time of day, in your store's timezone.
Answers
Frequently asked questions
Taxes, refunds, POS, themes, translations: the questions merchants actually ask.
Use case guides
Step-by-step recipes for Pfand, retail delivery fees, tariffs, CRV, and many more.
Glossary
Pfand, CRV, core charge, eco-participation: fee terminology explained.
How fee rules combine
Every fee has its own conditions, and you choose how they combine:
- All conditions (AND). The fee applies only when every condition matches. Use this for precise targeting, for example: product tagged deposit AND customer in Germany.
- Any condition (OR). The fee applies when at least one condition matches. Use this for alternatives, for example: collection is Beverages OR product type is Drinks.
- Negative rules. Rules like is not one of and does not contain require that nothing in the order matches. A fee with the condition "discount code is not one of FEEFREE" is waived as soon as that code is applied. See the waiver recipes.
- Per-product fees always use AND and need at least one product condition (tag, collection, type, SKU, and so on). The product conditions select which items are charged; any cart or customer conditions gate whether the fee applies at all.
- Multiple fees stack. Each published fee is evaluated on its own, so a Pfand deposit and a small order surcharge can both apply to the same order, each as its own line item.