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Shopify Plus checkout customizations

Custom fields, offers and rules right in the Shopify checkout. We build them with Checkout UI extensions and Shopify Functions, the official way Shopify supports.

Checkout UI extensionsShopify FunctionsCart validationCheckout upsellB2B

Store examples

Four checkouts we customized. Each one solves a different problem.

Elmich

Business purchases with a VIES check

The customer enters a company number and VAT ID right in the checkout. We check the number in the VIES register straight away.

A business from another EU country then pays the price without VAT.

Checkout UI extensionVIESB2B
Posedla

A checkout for made-to-measure saddles

The checkout recognizes business customers and offers the impression kit that the Joyseat saddle is made from.

New padding can only be ordered by someone who already owns the saddle.

Checkout UI extensionCart validationB2B
Verra

Recommended products and order checks

The order summary offers products based on what is in the cart. They are added in one click.

A function also stops the same Synlab lab test from being ordered twice.

Checkout UI extensionUpsellShopify Functions
Erotic City

The final amount including the COD fee

When the customer picks cash on delivery, a checkout block shows the final amount with the fee right away.

Nobody gets a surprise at the door.

Checkout UI extensionCash on delivery

What we build into the checkout

A selection of what already runs in our clients' stores.

Cart validation

The checkout stops orders that make no sense. Like the same test twice at Verra, or padding without a saddle at Posedla.

Shopify Functions

Checkout upsell

Products offered based on the cart. The customer adds them in one click, without going back to the store.

Checkout UI extensionHigher AOV

Free gift

When a customer qualifies for a gift but it is not in the cart, Facederma offers it right before the Pay button.

Checkout UI extension

Phone required for pickup

For store pickup, Facederma requires a phone number and checks its format. The store can always reach the customer.

Checkout UI extension

Rule-based discounts and prices

Third item at half price at Posedla, gift prices based on cart value at Facederma. Business customers can have their own rules.

Shopify FunctionsCart transform

Terms and consents

Checkboxes for terms of service, the refund policy or opting out of the Heureka survey, right above the Pay button.

Checkout UI extensionHeureka

Ready-made checkout apps

When a ready-made solution is enough, you can set it up in minutes, with no development.

Payflow

Payment and shipping rules, a cash on delivery fee and a payment QR code on the thank-you page.

Try Payflow
Globe

Carriers and pickup points right in the checkout, cash on delivery rounded to a whole number.

Try Globe
Charm

Loyalty points and rewards the customer redeems right in the checkout.

Try Charm

Frequently Asked Questions

Do I need Shopify Plus?
Shopify only allows blocks inside the checkout steps, like an upsell or company fields, on the Plus plan. Blocks on the thank-you page and in the customer account work on every plan.
What is the difference between a Checkout UI extension and a Shopify Function?
An extension is what the customer sees in the checkout: a field, a block or an offer. A function runs on Shopify's servers and changes the logic: prices, discounts, shipping, payments, or whether the order can go through at all.
Will the customization survive Shopify updates?
Yes. Extensions and Functions are the official way that Shopify supports and maintains. Customizations in the old checkout.liquid stopped working when Shopify turned it off.
Can I change the checkout blocks myself?
Yes. Blocks are placed in the checkout editor in the Shopify admin. You change the texts and settings we prepare for you without a developer.

Got a problem no app solves?

Tell us about it. We'll say whether it takes a setting, an app or custom development.