Custom Wix Checkout & eCommerce Development

Can you add a custom payment provider (Tamara, Tabby or a local gateway) to Wix checkout?

Yes, if the provider has an API. Wix lets developers connect new payment methods through the Payment Provider service plugin in Velo. Once it’s built and connected, the method shows up in the normal Wix checkout next to cards and PayPal, so customers never leave your store and orders, refunds and statuses stay in your Wix dashboard.

This is how we added Tamara, Tabby and Moyasar to Wix checkout for GCC stores. It’s the right route for buy-now-pay-later providers, regional wallets and local bank gateways that Wix doesn’t offer out of the box.

 

What our Wix eCommerce and checkout development includes

• Custom payment providers: buy-now-pay-later, regional wallets and local gateways added as native options in Wix checkout.

• Custom shipping rules: fees by postal code, region, prefecture, weight, product type or delivery method.

• Extra fees and checkout validations: handling or packaging fees, minimum order rules, and checks that stop a wrong order before payment.

• Delivery-date and pickup-slot pickers built into the store, without a third-party app.

• Custom payment forms with dynamic pricing for services and quotes that don’t fit a normal product.

• Checkout UX and conversion fixes: fewer steps, clearer shipping and fee messages, trust signals and mobile checkout testing.

• Order automations: send new orders to Trello, Google Sheets, Airtable, your CRM or your fulfillment team the moment they’re placed.

• Product builders and quizzes: gift-box configurators, made-to-order options and product recommendation quizzes.

• Store setup: shipping, taxes and payment methods configured and tested end to end.

 

How a custom checkout feature plugs into Wix (the technical side, in 4 steps)

Wix keeps its checkout secure and hosted, so you can’t freely edit its code. Instead, Wix exposes service plugins: points in the checkout where Wix calls your own backend code and uses the answer. That’s how a custom feature can look and behave like part of the native Wix checkout.

1. The customer acts at checkout. They enter an address, pick a delivery option or choose a payment method.

2. Wix calls your service plugin. Velo backend code on your site receives the cart and checkout details.

3. Your code applies your rules. It can call an outside API (a payment provider, a postal-code lookup, a delivery calendar) and work out the result.

4. Wix shows the result in its own checkout. A new payment option, a shipping fee, an extra fee or a validation message, recalculated live when the customer changes something.

The main service plugins we use:

• Payment Provider: add a new payment method to Wix checkout. Our example: Tamara, Tabby and Moyasar for GCC stores.

• Shipping Rates: return your own shipping options and prices. Our example: rates by region or delivery method.

• Additional Fees: add fees calculated from the cart and address. Our example: shipping fees for all 47 Japanese prefectures.

• Validations: block or warn on orders that break your rules. Our example: minimum order or delivery-area checks.

For things that happen after payment, like sending an order to Trello or a CRM, we use Wix eCommerce events: backend code runs the moment an order is created.

 

Wix checkout projects we’ve shipped

Tamara, Tabby and Moyasar as native payment options in Wix checkout (GCC)

We added Tamara, a GCC buy-now-pay-later provider, to the standard Wix checkout with the Payment Provider service plugin, so shoppers can split payments without leaving the store. About 1 in 5 orders (≈20%) was paid with Tamara within the first 3 months. We’ve since added Tabby (buy now, pay later) and Moyasar (cards, mada and Apple Pay) the same way.

Shipping fees for all 47 Japanese prefectures

A Japanese specialty coffee brand needed shipping fees by prefecture, which Wix doesn’t support out of the box, and Wix checkout doesn’t pass the prefecture to the backend. We built a Velo eCommerce service plugin that reads the customer’s postal code, looks up the prefecture through a Japan postal-code API and applies the right fee for all 47 prefectures, recalculating instantly if the address changes. Read the Japan shipping case study

Wix store orders sent to Trello automatically

A US car-parts store was copying every order into Trello by hand. A backend Velo function now creates a formatted Trello card the moment an order is placed, with the customer, addresses, every product, variant and price modifier, and the cost summary. Read the Trello automation case study

Custom payment form with dynamic pricing

For a French clothing-care service, we built a Wix payment form that calculates the price and delivery date in real time from the service type, number of items and pickup date, then takes payment through Wix’s built-in payment system. Read the payment form case study

More store builds: a custom delivery-date calendar for SOYOO with no plugins, a build-your-own gift box configurator for Luup, and a made-to-order skincare quiz for Nådayen (Nada Skin). See them in our portfolio and read what clients say.

 

Can I edit the Wix checkout page or checkout form?

Partly. In the Wix dashboard you can change checkout settings such as fields, policies, payment and shipping methods and some text. You can’t rewrite the checkout page’s code. When you need more, there are three routes: extend the native checkout with service plugins (payment, shipping, fees, validations), add logic before checkout (cart rules, product options, custom forms), or, for fully custom flows, take payment through a custom Velo payment form. We’ll tell you which route fits on the feasibility call.

 

Can Wix calculate custom shipping fees by postal code or region?

Not out of the box: built-in Wix shipping covers flat, weight-based and price-based rates by country and region. With a service plugin, Wix can calculate fees from the postal code, a lookup table or an outside API, which is exactly how we priced shipping for all 47 Japanese prefectures.

 

Can I add a delivery-date picker to Wix Stores without an app?

Yes. We build delivery-date and pickup-slot calendars with Velo, with your own rules for lead times, blocked days, cut-off times and capacity, and save the chosen date on the order. We did this for SOYOO with no plugins.

 

How do I automate Wix store orders (Trello, Google Sheets or a CRM)?

Use a backend function that runs on Wix’s order-created event and sends the order to the other tool through its API. No copy-paste, no Zapier fees per task, and it handles multi-item orders and variants. We’ve connected Wix stores to Trello and other tools this way; Google Sheets, Airtable and most CRMs work the same.

 

How much does Wix checkout customization cost?

Our store work starts at these prices (the same ‘from’ prices as our Wix Marketplace profile):

• Store settings (shipping, taxes and payment methods): from $300

• Advanced store capabilities (custom product pages, discoverability, special menus): from $800

• eCommerce website with up to 20 products, payment and shipping: from $1,200

• Custom payment providers, shipping plugins, delivery calendars and order automations: fixed quote after the feasibility call

What changes the price: the provider’s API and approval process, how many rules and regions, whether you also need Wix Bookings or subscriptions, the tools to connect, and your deadline.

 

Why store owners choose Wix Squad for Wix checkout work

• Wix’s own vetting: Wix Squad is a Wix Legend Partner.

• We’ve done the hard ones: three native GCC payment providers (Tamara, Tabby, Moyasar) in Wix checkout, and prefecture-level shipping for Japan.

• Code you own: everything runs in your own Wix site, with no monthly app fee for the custom part.

• Track record: 200+ Wix projects, 150+ clients, 50+ of them long-term partners, and a 5.0 average across client reviews on wixsquad.com.

• Time zones that work: clients in the US, UK and Europe, with overlap for calls and quick fixes.

 

Wix checkout FAQs

Does a custom payment provider work with Wix Bookings and Pricing Plans too?

Often, yes. A Payment Provider service plugin is a site-wide payment method, so it can appear wherever Wix checkout is used. We confirm which of your apps it supports on the feasibility call.

Do I need a Wix Premium plan?

Yes. Accepting payments on Wix needs a Premium plan that supports eCommerce, and custom service plugins run on your site’s Velo backend.

Is a custom payment integration secure?

Yes. Customers still pay on the provider’s secure page or widget, card data never touches your site, and API keys are kept in Wix’s Secrets Manager, not in page code.

Will Wix updates break my custom checkout?

Service plugins are Wix’s official, supported way to extend checkout, so they’re far more stable than page hacks. We test after major Wix changes for clients on support.

Can you fix an existing checkout plugin or integration someone else built?

Yes. We review the code, fix what’s broken and document it so your team knows how it works.

Do you also build the store itself?

Yes. We design and build Wix Stores and Wix Studio stores, and add the custom checkout work on top.