Pass card processing fees to your customers, at checkout.
FeeLayer adds a transparent processing-fee line item using Shopify's Cart Transform Functions. The fee can't be deleted from the cart by the customer, and it works with Shop Pay, Apple Pay, and Google Pay on every plan. Card-brand caps (Visa 3%, Mastercard 4%) and no-surcharge states (CT, MA, ME) are enforced automatically.
Stop eating credit card fees.Recover them at checkout.
FeeLayer adds a transparent processing-fee surcharge at checkout, enforced by Cart Transform and Checkout Validation Functions running inside Shopify's infrastructure, so the fee applies on Shop Pay, Apple Pay, and Google Pay too.
Itemize fees clearly as a line item so customers understand what changed and why.
Set percent or fixed fees, eligibility rules, and customer-facing labels that match your brand.
Use region rules and disclosures as a starting point for compliance workflows in applicable states.
Built to match Shopify merchant workflows, storefront patterns, and checkout extensibility.
Most fee apps get bypassed at checkout.
Apps that rely on JavaScript injection or Checkout UI Extensions alone get stripped by Shop Pay, Apple Pay, and Google Pay. FeeLayer runs inside Shopify's infrastructure as two WebAssembly functions, so fees are enforced server-side.
JS injection + UI extensions
What most Shopify surcharge apps are running today.
- Express checkout (Shop Pay, Apple Pay, Google Pay) skips the UI extension
- Customers can strip the line-item fee from cart
- Cart Transform collisions when bundles are installed
- Mobile browser inconsistency (Android / iOS Safari)
Cart Transform + Validation Functions
Shopify's newest architecture, adopted here, not retrofitted.
- Server-side recalc on every cart mutation
- Checkout Validation rejects orders with tampered totals
- Express-checkout safe. Functions run before payment auth
- Theme App Extension for storefront disclosure
Every fee recovered, live.
Built natively into Shopify Admin. Configure, pause, and audit fees in one place, no dev, no theme edits.
- One-switch killPause fee collection globally in one click.
- Flat, percentage, or hybridCap per order. Exempt debit. Skip ACH.
- POS + online paritySame rules at the register as online.
- State compliance rulesAuto-waive in prohibited states with full audit log.
Surcharge where it's legal. Waive where it's not.
FeeLayer ships with a rule engine that auto-waives fees in prohibited states and enforces card-brand caps and disclosure requirements.
FeeLayer handles the rule matrix so you don't have to manage it manually.
Everything the leaders offer, at 20% of the price
Compared against the top surcharge apps on the Shopify App Store. Feature checks are based on publicly documented behavior and pricing as of April 2026.
Cart Transform Functions
Checkout Validation Functions (2nd enforcement layer)
Bypass-proof on Shop Pay, Apple Pay, Google Pay
US state compliance auto-waive
Card-brand caps enforced (Visa 3% / MC 4%)
POS + online parity
Theme App Extension (storefront disclosure)
Abandoned-cart safe (no draft orders)
Pricing model
Monthly price (entry plan)
Source: Shopify App Store listings, vendor websites, and user-review analysis, April 2026. Features reflect default behavior on each app's entry-level plan; higher-tier plans may add capabilities that are only listed on paid tiers. Pricing shown is the lowest public plan, excluding free trials.
Stop absorbing card processing fees
Install FeeLayer from the Shopify App Store and start recovering card fees in minutes.
One app. Three modules.
Recover every dollar lost to processing fees. Stack all three for flat pricing with no volume caps.