Shopify Surcharge App for Cart Fees & Shipping Protection Made Simple
Add handling fees, shipping protection, service charges, and custom surcharges to your Shopify cart. Let customers opt-in to optional fees while maintaining transparency. Increase your average order value.
How to Add Surcharges to Shopify
Three simple steps to add fees and surcharges to your Shopify cart. Set up surcharge rules, customize your widget, and start collecting fees in under 5 minutes.
Set up your fee and surcharge structure
Why it matters: Flexible surcharge creation lets you model fees that match your business needs.
Create Surcharge Rules
Define fixed, percentage, or combined surcharges. Set price-range tiers and choose which products the surcharge rule applies to.
Configure Widget
Pick a template or customize the surcharge widget with your own HTML and CSS. Set titles, descriptions, and checkbox behavior.
Go Live
Turn on the widget and surcharges apply automatically to matching orders. Track fee revenue in your Shopify admin.
Atomic install
Drop the block, select targets, publish — no theme surgery or risky merges.
Resilient runtime
Observes cart state and reconciles instantly — no render storms or flicker.
Transparent tracking
Emits analytics hooks so uplift and attach rate become first‑class metrics.
Shopify Fee & Surcharge Features
Everything you need to add fees and surcharges to your Shopify cart: flexible rules, fast rendering, 100+ theme compatibility & fully customizable widgets.
Flexible Surcharge Rules
Apply fees, surcharges, tariffs, and deposits by product or cart-wide. Set price-based tiers with multiple ranges and exclude specific products.
- Fixed & % surcharges
- Combined fee type
- Price-range tiers
- Product-specific fees
- Excluded products
No Layout Shift
A reserved footprint and lightweight runtime keep the surcharge widget from causing layout shift or flicker.
- Zero CLS
- Lightweight runtime
- Predictable ordering
100+ Theme Support
Adaptive host selectors + checkout sync keep your fee widget transparent & stable across Shopify Online Store 2.0 themes.
- Checkout pass-through
- Discount aware
- Multi-currency
Fee & Surcharge Attribution
Track fee and surcharge revenue per order with clear attribution in your Shopify admin. See exactly how much each rule earns you.
- Order tracking
- Surcharge breakdown
- Per-rule revenue
Predictable Surcharges
Fees and surcharges apply consistently with clear priority rules.
- Stable outcomes
- Clear rules
Accessible By Design
Semantic markup, focus choreography & SR announcements for your fee widget.
- ARIA live cues
- Keyboard flows
Surcharge Overview
See your fee and surcharge rules at a glance and track orders with TackOn surcharges.
- Rule management
- Order history
Widget Templates
Choose from preset templates or customize the surcharge widget HTML & CSS to match your brand.
- Template library
- Custom HTML/CSS
- Brand matching
See TackOn in Action
A look inside TackOn — the dashboard, fee-rule builder, widget settings, and how the widget appears on your cart page and slide-out drawer.
Integrations
Built on native Shopify surfaces. TackOn works with your existing theme, checkout, and cart setup without requiring custom code.
- Shopify CheckoutCoreFee sync at checkout
- Online Store 2.0CoreTheme app extension
- Discount CodesCoreWorks with discounts
- Cart DrawerCoreWidget placement
- Multi-currencyCoreFollows store currency
- MarketsBetaCurrency aware fees
Fees are reflected at checkout automatically without extra configuration.
Works with Online Store 2.0 themes via app blocks - no code edits needed.
Fees follow your store's currency settings via Shopify APIs.
Runtime Signals
The widget reserves its space before it renders, so it never pushes your cart around — no layout shift across Shopify Online Store 2.0 themes.
Merchant Feedback
Lightweight install, reliable fee logic, and fast support. Here's what a merchant says about TackOn.
"They help very quickly and well."
Translated from the original Dutch: "Ze helpen erg snel en goed."
Shopify Fee & Surcharge App Pricing
Start with 20 orders free forever. After that, pay only when customers pay fees or surcharges through TackOn. No fees collected = no charges to you.
Perfect for trying TackOn or low-volume stores.
- 20 orders per month
- Resets monthly
- All surcharge types & rules
- All widget templates
- Multi-currency support
- Product-specific surcharges
- No credit card required
Automatically activated on install
Includes 50 orders. Then just $0.10 per additional order.
- 50 orders included monthly
- $0.10 per order after 50
- 30-day free trial
- Unlimited surcharge types & rules
- All widget templates
- Multi-currency support
- Product-specific surcharges
- $99.99/month maximum cap
No credit card required • Cancel anytime
50
orders with surcharges
$5.00
/month
200
orders with surcharges
$20.00
/month
500
orders with surcharges
$50.00
/month
$5/month base • 50 orders included • Cancel anytime • Capped at $99.99/month
Frequently Asked Questions
Everything you need to know about adding fees and surcharges to your Shopify store.
With TackOn, you can add any type of surcharge or fee to your Shopify cart in minutes. Simply install the app, create your fee rules (fixed, percentage, or tiered), and enable the widget on your cart page. No coding required.
TackOn supports handling fees, shipping protection, rush processing charges, environmental fees, service surcharges, tariffs, deposits, packaging fees, gift wrapping fees, and any custom fees you need. You can set fixed amounts, percentages, or tiered pricing based on cart value.
No. TackOn's widget is optimized for performance — it loads asynchronously and doesn't cause layout shifts. The lightweight widget keeps your store speed and Core Web Vitals unaffected.
Yes! TackOn is theme-agnostic and works with 100+ Shopify themes including Dawn, Refresh, Sense, and all Online Store 2.0 themes. It automatically adapts to your theme's cart page layout.
Absolutely. You can create product-specific fee rules, exclude certain products, or set cart-wide fees. This flexibility lets you charge handling fees only on fragile items, for example.
TackOn offers a 30-day free trial on the Starter plan with full access to all features. No credit card required. After the trial, the Starter plan is $5/month which includes 50 orders. Additional orders are $0.10 each, capped at $99.99/month total. You can also stay on the free plan which includes 20 orders per month at no cost.
Yes. When customers opt-in to a fee, it's added as a line item and appears clearly throughout the checkout process. This ensures full transparency and compliance with Shopify's guidelines.
Yes. TackOn fully supports Shopify Markets and multi-currency stores. Fees are automatically calculated and displayed in your customer's local currency.