Shopify Plus checkout extensions
Customize Shopify checkout with Plus checkout extensions
Shopify's checkout is optimized for conversion and security, but standard Shopify limits what you can change. Shopify Plus unlocks checkout extensibility through checkout UI extensions and Shopify Functions. Starcodia builds custom checkout experiences that collect the data you need, apply the logic your business requires, and increase average order value through strategic upsells.
What Shopify Plus checkout extensions can do
Checkout extensions provide customization points throughout the checkout flow. Starcodia builds extensions for various use cases:
Custom fields and data collection. Collect information that standard checkout does not capture: gift messages, delivery instructions, purchase order numbers for B2B, or custom attributes required by your fulfillment process. Data is attached to the order and flows to your systems.
Validation and verification. Add validation logic before checkout completes: address verification, age verification, fraud signals, inventory confirmation, or credit limit checks for B2B customers. Invalid orders can be blocked or flagged before processing.
Payment method logic. Control which payment methods appear based on order value, customer segment, product type or geography. Hide certain options, reorder presentation, or add payment methods conditionally.
Shipping and delivery customization. Modify shipping options dynamically, add delivery date selection, present in-store pickup locations, or apply shipping rules based on product type or destination.
Checkout upsells. Present relevant product recommendations during checkout to increase average order value. Upsell logic can be based on cart contents, customer history, margin optimization or complementary product relationships.
Post-purchase offers. After checkout completes, present one-click upsell offers that add to the order without re-entering payment. This captures additional revenue without friction.
Branding and messaging. Customize checkout appearance with your brand colors, custom content, trust badges, delivery promises and messaging that reinforces purchase confidence.
How Shopify Plus checkout extensions work
Shopify Plus provides two main extension mechanisms:
Checkout UI extensions. These add user interface elements to checkout: fields, banners, product suggestions, content blocks and interactive components. They run in Shopify's secure checkout environment while providing the customization you need.
Shopify Functions. These add backend logic to checkout: discount calculations, shipping rate modifications, payment method filtering and validation rules. Functions run on Shopify's infrastructure for reliability and performance.
Starcodia builds extensions using Shopify's extensibility framework, which replaces the deprecated checkout.liquid approach. Extensions built this way will continue working as Shopify evolves checkout, protecting your investment in customization.
Checkout extension scenarios Starcodia has built
Checkout requirements vary by business model. Here are patterns Starcodia has implemented:
B2B payment terms. A B2B wholesale merchant needed checkout to display payment terms from their ERP and collect PO numbers. Starcodia built extensions that show the customer's credit limit, apply net 30 or net 60 terms, collect required PO information, and validate against credit availability.
Delivery date selection. A food brand needed customers to select delivery dates at checkout. Extensions presented available delivery slots based on customer location and order cutoff times, with selected dates flowing to their fulfillment system.
Post-purchase upsells. A beauty brand wanted to increase AOV without adding checkout friction. Starcodia implemented post-purchase offers that present complementary products after checkout completion, allowing one-click addition to the order.
Age and address verification. A brand selling age-restricted products needed verification at checkout. Extensions integrated with verification services to validate customer age and address before order completion.
How Starcodia develops checkout extensions
Checkout extension development follows a structured approach:
- Requirements definition. Understand the business need and map it to checkout extension capabilities
- Architecture design. Design the extension architecture including any backend services or integrations required
- Development and testing. Build extensions following Shopify's extensibility guidelines with thorough testing on development stores
- Deployment. Deploy to production with monitoring for any checkout impact
- Ongoing maintenance. Monitor extension performance and update as Shopify's checkout evolves
Extensions are built to be maintainable, well-documented and aligned with Shopify's recommended patterns.
Speak with Starcodia about checkout extensions
If you need checkout customization beyond what standard Shopify provides, Starcodia can discuss your requirements and design extensions that deliver the functionality you need.
Share what you want to accomplish at checkout, and the team will outline how extensions can address it.
Discuss checkout extensions