Merchant Processing Add-On -

Payment Processing Add-On

Start accepting payments on the website you already have.

If you already have a website and just need the ability to accept payments, the Merchant Processing Add-On adds merchant processing to any existing website — no rebuild required.

Book a Free Consultation View Pricing & Plans

Requires an existing website. This add-on connects payment processing to a site you already have.

Website checkout page with payment processing added

Payment Add-Ons Available

Any Website

Compatible With What You Have

Simple, Transparent Pricing

One flat price to add payment processing.

No tiers to choose between — just one add-on, added to the website you already have.

Any Existing Website

One-time add-on fee · USD

Pricing above reflects Sites by Sara's one-time setup and integration fees. Your payment processor's own transaction fees are billed separately by them.

Don't have a WooCommerce store yet? See our WooCommerce Stores page.

Detailed Breakdown

What's involved in adding payment processing.

From your existing site to accepting your first payment.

Discovery Call

We review your existing website and what you need to start accepting payments.

Website Review

Confirming your existing website is ready for payment processing to be added.

Payment Gateway Setup

Configuring your merchant processing connection to your site.

Checkout Integration

Connecting payment processing into your site's existing checkout flow.

Security Review

Confirming the connection between your site and your payment processor is secure.

Test Transactions

Running test transactions before anything goes live for real customers.

Launch

Turning on payment processing for your existing website.

Handoff

A walkthrough of how payments now flow through your existing site.

Start Accepting Payments

Payment processing, added to what you already have.

The Merchant Processing Add-On adds merchant processing to any existing website — a single, focused add-on rather than a new build.

See add-on pricing

Payment processing connection added to an existing website checkout

No Rebuild Required

Works with any existing website.

This add-on requires an existing website, but isn't limited to one platform — it's added to any existing site, without rebuilding what you already have.

See pricing details

Generic website icon connected to a payment processing icon

Selling On WooCommerce?

Already running a WooCommerce store?

This add-on works with an existing WooCommerce store. If you don't have a WooCommerce site yet, we can build one first.

See WooCommerce Stores

WooCommerce store checkout page with payment processing icon

Common Questions

Frequently Asked Questions

Everything you need to know about the Merchant Processing Add-On.

What's included in the Merchant Processing Add-On? +

The Merchant Processing Add-On is a one-time fee that adds merchant processing to any existing website. See the pricing above for the current rate.

Do I need a specific type of website for this add-on? +

No specific platform is required — this add-on requires an existing website, but works with any existing website.

Can I add this to my WooCommerce store? +

Yes. Since it works with any existing website, it can be added to an existing WooCommerce store. See our WooCommerce Stores page if you don't have a WooCommerce site yet.

Is this a one-time or recurring cost? +

Sites by Sara's fee is one-time, covering the setup and integration. Your payment processor's own transaction fees are billed separately by them.

What if I don't have a website yet? +

This add-on requires an existing website. If you don't have one yet, see our Custom WordPress Development, Static HTML Sites, or WooCommerce Stores pages to get one built first.

Does adding merchant processing require rebuilding my website? +

No. This is an add-on to your existing website, not a rebuild.

What other payment processing add-ons are available? +

Additional Processors adds support for more payment methods on top of the base add-on. ACH Bank Payments adds direct bank-to-bank transfers. All-In-One Processing moves your checkout onto PayPal Enterprise Payments. Custom Gateway Integration connects your existing point-of-sale or merchant account to your website. Each is priced and ordered separately.

Merchant Processing Add-On