Checkout UI extensions
Information, upsell, and compliance blocks that belong in checkout, not hacked into legacy scripts.
Shopify Plus ยท Checkout
Checkout extensions and Functions without painting yourself into a corner
Checkout UI extensions, customer account extensions, and Shopify Functions for pricing, delivery, and payment logic. For Shopify Plus brands that need checkout customisation that still scales with platform updates.
Shopify Functions
Discount, delivery, payment, and cart validation logic with testable rules instead of brittle workarounds.
Customer account extensions
Post-purchase and account surfaces that match your stack and data model.
Plus checkout strategy
What belongs in checkout vs theme vs app vs ERP, decided before build spend.
Upgrade-safe patterns
Architecture that survives Shopify platform changes better than one-off checkout.liquid edits.
Deliverables
What you get
- Checkout and account extension scoping tied to business rules
- Functions and extensions built, tested, and deployed to Plus checkout
- Documentation for merchandising and ops teams
- Coordination with theme and integration layers
- Optional ongoing partnership for checkout iteration
How we work
Aligned to Stack Recovery
- 01
Map rules
Translate commercial rules into Shopify-native primitives.
- 02
Prototype
Validate on Plus development store with realistic cart scenarios.
- 03
Deploy
Controlled rollout with monitoring and rollback plan.
- 04
Iterate
Measure impact on completion and margin, not vanity checkout metrics alone.
Shopify UI Extensions and Functions
Do we need Shopify Plus for checkout extensions?
Checkout UI extensions and most advanced checkout customisation require Shopify Plus. We confirm plan fit early and advise when Plus is not yet justified.
Functions vs checkout scripts?
Shopify Functions are the supported path for discount, delivery, and payment customisation. We migrate away from legacy patterns where they create upgrade risk.
Can you fix checkout abandonment issues?
We address structural checkout friction: payment, delivery, and information architecture. Read our guide on Shopify checkout abandonment for the diagnostic frame we use.
Do you work with existing Plus agencies?
We can lead checkout work or partner as the technical depth layer. Middleman-only engagements are deprioritised unless decision makers are in the room.
How long do checkout builds take?
Simple extensions can ship in weeks. Multi-function checkout logic with ERP or subscription dependencies typically spans several sprints. We scope in discovery.
What is the entry point?
Book a discovery call or request a stack audit that includes checkout review.
Need a partner for Shopify UI Extensions and Functions?
Start with a discovery call. We will assess whether a stack audit or a scoped build is the right entry point for your store.