How to Switch Payment Processors Without Rebuilding Your Website

Let’s Establish Which Integration Type Your Website Uses

The complexity of switching processors depends entirely on how payment processing is integrated into your website. There are four integration types, ranging from trivially easy to switch to moderately complex. Identifying yours takes about 2 minutes and determines your realistic switching timeline.

Integration Type 1: Plugin-Based Gateway (Easiest – Hours)

Your website is built on a standard e-commerce platform (WooCommerce, BigCommerce, Magento, Shopify via compatible gateway) and payment processing is handled by an installed plugin or extension that connects the platform’s checkout to a payment gateway. The plugin handles all the payment logic; your website checkout code does not need to change at all. Switching processors means: install new plugin, enter new credentials, deactivate old plugin. That is the entire technical migration.

Identify if this is you: Your website is on WordPress with WooCommerce, BigCommerce, Magento, Squarespace, or Wix, and payment processing is managed through a section in your platform’s admin (WooCommerce Payments, BigCommerce Payment Methods, etc.). If yes, you are on a plugin-based integration.

Integration Type 2: Hosted Payment Page / Payment Link Redirect (Easiest – 15 Minutes)

Your website does not have a checkout form at all – clicking “Buy Now” or “Pay Now” redirects the customer to a payment page hosted on the processor’s domain (Stripe Checkout, PayPal Checkout, or a Coastal Pay payment link). Payment is completed on the hosted page; the customer returns to your site after. Switching processors with this integration type means updating one URL – the destination of the redirect. This is a website admin task, not a development task.

Identify if this is you: When a customer clicks your checkout button, they leave your website domain and land on a payment page hosted on a different domain (stripe.com, paypal.com, or similar). You do not have a payment form hosted on your own website. If yes, you are on a hosted payment page integration.

Integration Type 3: Semi-Custom Checkout With Gateway API (Moderate – Days)

Your website has a checkout form that appears on your own domain, but payment processing is handled through an API integration with a payment gateway. The checkout form uses the processor’s JavaScript library (Stripe Elements, Square Web Payments SDK) to tokenize card data client-side, and your server calls the processor’s API to complete the charge. Switching requires updating the JavaScript library and server-side API calls to the new processor.

Identify if this is you: Your checkout form loads on your domain but includes a script tag from a payment processor (stripe.js, js.braintreegateway.com, etc.). Your server makes API calls to the processor. If yes, you have a semi-custom checkout. A developer is needed for migration, but the core website structure does not change.

Integration Type 4: Fully Custom Payment Integration (Complex – Weeks)

Payment processing is deeply embedded in bespoke application code, often in a custom-built e-commerce platform, SaaS product, or marketplace. The payment integration is tightly coupled to specific API response formats, webhook event structures, and internal data models. Migration requires developer time proportional to the integration complexity – but still does not require rebuilding the website itself, only updating the payment layer.

Identify if this is you: Your website was built by a development team from scratch (not on a standard e-commerce platform) and your payment processing is embedded throughout the application code rather than in a discrete plugin or library. If yes, you need development resources for migration. Coastal Pay’s REST API is standard REST/JSON that any developer can migrate to.

Here’s the Step-by-Step Switch for Each Platform Type

WooCommerce (WordPress)

Switching complexity: Low. Time: 30 to 90 minutes. Developer needed: No.

1. Apply at coastalpay.com and receive approval in approximately 2 minutes. Retrieve your API key and merchant ID from the Coastal Pay Gateway dashboard.
2. In your WordPress admin, go to Plugins and search for the Coastal Pay WooCommerce plugin. Install and activate it.
3. Navigate to WooCommerce – Settings – Payments. Select Coastal Pay. Enter your API key and merchant ID from your Coastal Pay dashboard. Enable the payment methods you want to offer (card, Apple Pay, Google Pay, Klarna, Afterpay, ACH).
4. Set Coastal Pay to test mode. Place a test order on your store using a test card number provided in the Coastal Pay dashboard. Confirm the order processes, the receipt delivers to the test email, and the transaction appears in your Coastal Pay dashboard.
5. Switch to live mode in the plugin settings.
6. Deactivate and uninstall the old payment plugin.
7. Place a live $1.00 test order with a real card to confirm the live integration is working.

What does NOT change: Your WordPress theme, your product catalog, your cart, your order management, your shipping settings, your customer accounts, and all other WooCommerce configuration. The entire website experience is identical – only the payment gateway behind the checkout changes.

BigCommerce

Switching complexity: Low. Time: 30 to 60 minutes. Developer needed: No.

1. Apply at coastalpay.com and receive approval. Retrieve API credentials from your Coastal Pay dashboard.
2. In your BigCommerce control panel, navigate to Store Setup – Payments.
3. Select Coastal Pay from the available payment providers, or add via the manual gateway configuration if Coastal Pay appears as a manual gateway option. Enter your Coastal Pay credentials.
4. Enable your preferred payment methods in the BigCommerce payment settings.
5. Test with a test transaction in your BigCommerce test environment before going live.
6. Disable the previous payment provider once Coastal Pay is confirmed live.

Magento 2

Switching complexity: Low to moderate. Time: 1 to 4 hours. Developer recommended for first-time Magento 2 extension installs.

1. Apply at coastalpay.com and receive approval. Retrieve API credentials from your Coastal Pay Gateway dashboard.
2. Install the Coastal Pay Magento 2 extension via Composer or manual upload. Contact 888-266-1715 for the current extension download path.
3. In Magento Admin, navigate to Stores – Configuration – Sales – Payment Methods. Configure Coastal Pay with your API credentials.
4. Enable in test mode and run a test order through your Magento checkout to confirm authorization, receipt, and order status update.
5. Switch to live mode. Disable the previous payment method configuration.

Custom Checkout (Semi-Custom or Fully Custom)

Switching complexity: Moderate to high. Time: Days to weeks. Developer required.

For custom checkouts, the migration path uses Coastal Pay’s REST API. The high-level technical changes your developer will make:

• Authentication: Replace the existing processor’s API key/secret with Coastal Pay API credentials. Authentication method: standard API key in the Authorization header.
• Tokenization (client-side): Replace the existing processor’s JavaScript tokenization library with Coastal Pay’s hosted fields JavaScript. Hosted fields provide iFrame-based card input that tokenizes card data before it reaches your server, maintaining SAQ A-EP PCI scope.
• Payment intent / charge creation (server-side): Replace the existing processor’s charge or payment intent API calls with the equivalent Coastal Pay REST API endpoints. Full API documentation at coastalpay.com/api-links.
• Webhook handling: Update webhook endpoint configuration in Coastal Pay’s dashboard to point to your existing webhook handler URL. Update the payload parser to handle Coastal Pay’s event schema. Verify webhook signature using the new signing secret.
• Response handling: Update API response parsing to match Coastal Pay’s response format for success, decline, and error conditions.
• ACH and alternative methods: If your checkout adds ACH or wallet methods, connect these through Coastal Pay’s unified payment component or API endpoints for each method.

Contact 888-266-1715 to get Coastal Pay’s developer documentation before starting a custom migration. Coastal Pay’s technical support team can walk your developer through the integration path for your specific checkout architecture.

Hosted Payment Page / Payment Link Redirect

Switching complexity: Trivial. Time: 15 minutes. Developer needed: No.

1. Apply at coastalpay.com and receive approval in approximately 2 minutes.
2. Create a Coastal Pay payment link for your standard checkout amount (or a variable-amount link if the customer enters the amount at checkout). This takes under 60 seconds in the Coastal Pay Gateway dashboard.
3. In your website’s button or link editor, replace the existing payment link URL with the new Coastal Pay payment link URL.
4. Test: click the button on your website, confirm it redirects to the Coastal Pay-hosted checkout page, and complete a test payment.
5. Done. No code change, no plugin installation, no developer needed.

The customer experience: they click your button, land on a Coastal Pay-hosted checkout page accepting all enabled payment methods (card, Apple Pay, Google Pay, Venmo, Klarna, Afterpay, ACH), complete payment, and receive an automatic receipt. You see the confirmed payment in your Coastal Pay dashboard in real time.

What Stays the Same When You Switch to Coastal Pay?

The fear of website disruption is the primary reason businesses delay switching processors. This section maps specifically what changes and what stays completely unchanged when you switch to Coastal Pay.

What Changes

• The payment plugin or gateway credentials in your e-commerce platform settings
• The payment link URL in any button or CTA that points to a hosted checkout
• The payment processor name that appears in your admin reporting
• Your monthly processing statement (from old processor to Coastal Pay)
• Your settlement bank account deposit source (now from Coastal Pay rather than old processor)

What Does NOT Change

• Your website design, theme, and layout
• Your product catalog, pricing, and inventory
• Your cart and order flow (for plugin-based integrations)
• Your customer accounts and order history
• Your shipping and tax configuration
• Your CMS platform (WordPress, BigCommerce, Magento, etc.)
• Your domain name and hosting
• Your SEO rankings and page structure
• Your other integrations (email marketing, CRM, analytics, inventory management)
• The customer checkout experience (customers see a checkout – only the payment gateway behind it changes)

Switching payment processors on a WooCommerce or BigCommerce site is functionally identical to updating any other plugin credential. Your website is not rebuilt. Your checkout is not rebuilt. Only the payment gateway behind the checkout changes.

How Do You Test That the Switch Worked Before Going Live?

Testing before going live is the single step that prevents the most common post-migration issues. Do not skip any of these tests regardless of how confident you are in the integration.

The 5 Tests to Run Before Going Live

Test 1: Successful Card Authorization

Using a test card number provided in the Coastal Pay dashboard (or a real $1.00 charge on a live card in test mode bypass), complete a full checkout transaction. Confirm: the authorization succeeds, the order status updates correctly in your e-commerce platform, and the transaction appears in the Coastal Pay Gateway dashboard with the correct amount, description, and merchant ID.

Test 2: Receipt Delivery

Confirm the customer receipt email delivers to the email address entered at checkout, contains the correct order details, and matches the amount charged. This is a common failure point when email configuration is not updated after the platform switch.

Test 3: Decline Handling

Use a test card number that simulates a decline (Coastal Pay provides specific test card numbers for different decline reasons in the dashboard). Confirm the decline is communicated clearly to the customer at checkout, the order is not created for a declined payment, and the customer can try an alternate card without losing their cart.

Test 4: Webhook Delivery (For Custom Integrations)

Trigger a payment event and confirm the webhook delivers to your endpoint, your handler processes it correctly, and the resulting action (order fulfillment trigger, email notification, database update) fires as expected. Use Coastal Pay’s webhook logs in the Gateway dashboard to confirm delivery and response status.

Test 5: Alternative Payment Method

If you have enabled Apple Pay, Google Pay, Klarna, ACH, or any alternative payment method, complete at least one test transaction for each method you intend to offer. Confirm each method’s checkout flow, confirmation display, and receipt delivery work correctly before announcing the new payment methods to customers.

After Going Live: One More Test

After switching to live mode, place a real $1.00 transaction with an actual card. Confirm the funds appear in your Coastal Pay dashboard and settle to your business bank account within the expected 1 to 2 business day timeline. This confirms the full payment flow including settlement is operational, not just authorization.

Here’s How to Handle Switching Without Taking Your Checkout Offline

The safest approach to any payment processor switch is a parallel-run strategy that keeps the existing checkout functional during the transition period.

The Zero-Downtime Switch Sequence

1. Apply and get approved at Coastal Pay (Day 1): Apply at coastalpay.com, receive instant approval, and retrieve your API credentials. Do not touch your current checkout yet. Your existing checkout continues running on the old processor.
2. Create Coastal Pay payment links and test them (Day 1): Create payment links for your common transaction types. Test them independently in a separate browser tab. Confirm the hosted checkout works, payment methods are enabled, and receipts deliver correctly. All of this testing happens outside your live website.
3. Install and test the Coastal Pay plugin in test mode (Days 1 to 3): For plugin-based integrations, install the Coastal Pay plugin alongside your current payment plugin. Put Coastal Pay in test mode. Make sure your old plugin is still the active default payment method in your platform. This lets you test Coastal Pay’s integration without disrupting live customer checkouts.
4. Run parallel for 24 to 48 hours (Day 2 to 3): Run test transactions through Coastal Pay while your live checkout continues on the old processor. Fix any issues discovered in testing.
5. Switch default payment method (Day 3): Once testing is complete, set Coastal Pay as the default payment method in your platform settings, switch to live mode, and deactivate the old plugin. Run a live $1.00 test immediately after the switch.
6. Monitor for 48 hours (Days 3 to 5): Watch your Coastal Pay dashboard for any authorization failures, webhook delivery issues, or unusual decline rates that might indicate a configuration problem. Keep the old plugin installed but inactive for 48 hours as a fallback in case of an issue requiring rollback.
7. Deactivate and remove old plugin (Day 5+): After 48 hours of stable live processing, remove the old plugin and close the old merchant account if you no longer need it.

What About Recurring Billing and Subscription Customers During the Switch?

For websites with subscription or recurring billing customers, the checkout switch is straightforward – but the card-on-file migration for existing recurring subscribers requires additional handling. See the separate treatment in Coastal Pay’s migration guide. The short version:

• New subscribers who enroll after the switch are automatically on Coastal Pay – no action needed
• Existing subscribers whose cards are stored with the old processor need to re-enroll via a Coastal Pay payment link before their next billing date
• Send existing subscribers a Coastal Pay enrollment link 30 days before their next billing date with a brief explanation: “We are updating our payment system. Please click here to update your payment details.”
• Keep existing subscribers billing on the old processor until they have re-enrolled on Coastal Pay
• Close the old processor account only after all recurring subscribers have migrated

Contact 888-266-1715 to discuss your specific recurring billing migration approach before starting the switch.

Confirming Your Platform Is in Coastal Pay’s 2,000+ Integration Directory

Before applying to Coastal Pay, confirm your specific platform and version has a supported integration path. The fastest way: call 888-266-1715 with your platform name, version, and any hosting environment details. Coastal Pay’s team confirms the integration path in the same call – direct plugin, gateway credential configuration, API integration, or payment link bridge – and advises on any platform-specific considerations before you invest time in the migration.

Commonly Confirmed Compatible Platforms

• WooCommerce (WordPress) – all major versions
• BigCommerce – current and recent major versions
• Magento 2 – current and recent major versions
• Lightspeed Retail and Lightspeed Restaurant
• Revel Systems
• NCR Counterpoint and NCR Silver
• Custom REST API integrations via Coastal Pay’s developer API at coastalpay.com/api-links

Explore Coastal Pay’s full integration directory, REST API documentation for custom integrations, gateway features, and all supported payment methods.

Confirm Your Integration Path and Get Approved in 2 Minutes

Call to confirm your platform before starting: 888-266-1715

Frequently Asked Questions

Can you switch payment processors without rebuilding your website?

Yes. For most e-commerce sites on standard platforms (WooCommerce, BigCommerce, Magento), switching is a gateway credential swap – install the new processor’s plugin, enter new API credentials, test, and go live. No website rebuild required. For hosted payment page integrations, switching means updating one redirect URL – a 15-minute task. Only fully custom API integrations require developer time, and even then the website itself is not rebuilt – only the payment integration layer is updated. Coastal Pay’s 2,000+ integration directory covers most standard platforms.

How long does it take to switch payment processors on a WooCommerce site?

30 to 90 minutes: apply and get approved (~2 min), install the Coastal Pay WooCommerce plugin (5 min), enter API credentials (5 min), run test transactions (10 min), switch to live mode, deactivate old plugin. Your WordPress theme, product catalog, cart, and all other site functionality remain completely unchanged.

What is a hosted payment page and how does it make switching processors easier?

A hosted payment page is a checkout page hosted on the processor’s domain. Switching processors with a hosted payment page integration requires only changing the redirect URL in your website to point to the new processor’s checkout page – a 15-minute website admin task with no code changes and no developer needed. Coastal Pay’s payment links function as hosted payment pages – updating the destination URL is the entire switch for hosted checkout users.

Do I need a developer to switch payment processors?

For plugin-based integrations (WooCommerce, BigCommerce): no developer needed. For hosted payment page redirects: no developer needed. For custom API integrations: yes, a developer is needed to update API calls, authentication, and webhook handling. Coastal Pay’s REST API is standard REST/JSON – a developer familiar with the existing integration can typically complete the migration in hours to days. Contact 888-266-1715 for developer documentation before starting.