How do I charge a flat fee per order in Shopify?

Create a fixed cart fee in FlexiFees: set the amount, add conditions such as customer state or cart subtotal, and publish. Matching orders get the fee once, as its own line item at checkout.

How do I charge a fee per item in Shopify?

Create a fixed per-product fee. Add a product condition (tag, collection, type, or SKU) to select the items; the fee is multiplied by their quantity automatically, so 18 bottles at a 0.25 deposit charge 4.50.

Does a fixed fee change when the customer adds more items?

A fixed cart fee stays the same for the whole order. A fixed per-product fee grows with the quantity of matching items and updates live as the cart changes.

Fixed fees

Last updated: July 18, 2026

A fixed fee charges a flat amount. As a cart fee it is added once per order, which suits delivery fees and small order surcharges. As a per-product fee it is multiplied by the quantity of matching items, which suits deposits, recycling fees, and core charges.

Fixed cart fee: once per order

The whole order gets one flat charge when the conditions match. Real examples:

The Colorado Retail Delivery Fee: one fixed, non-taxable fee on every order delivered to Colorado.
A small order surcharge (Mindermengenzuschlag): 5 EUR when the subtotal is 50 EUR or less.
A winter heat pack fee: one insulated pack per shipment of live plants, October through April.

Fixed per-product fee: amount × quantity

Each matching item is charged, and quantity is respected automatically: 18 bottles with a 0.25 EUR deposit produce one fee line of 4.50 EUR. The product conditions select which items count. Real examples:

Bottle deposits: German Pfand at 0.25 EUR per one-way bottle.
California CRV: 0.05 or 0.10 USD per beverage container, by tag.
Core charges: a refundable deposit per remanufactured auto part.
Tire disposal fees: a state-mandated amount per tire.

FlexiFees fee form configured as a fixed per-product deposit of 0.25 EUR with the taxable toggle on

Details worth knowing

Amounts are in your store currency and work on multi-currency storefronts.
Discounts do not change a fixed fee. To waive it for specific customers or codes, add a discount code or customer tag condition.
Taxable or not, per fee. CRV is taxable in California; Colorado's delivery fee must not be taxed. One toggle covers both cases.
Minimum and maximum caps do not apply to fixed fees; the amount is already exact.

The full fee type matrix
Percentage fees when the charge should scale with price
All conditions for targeting the fee

Start free trial on Shopify

Fixed fees

Fixed cart fee: once per order

Fixed per-product fee: amount × quantity

Details worth knowing

Related