Shopify makes it easy to run an online store — but not every merchant is a good fit for Shopify Payments. Whether you’re working with a dedicated high-risk processor, an acquiring bank that issued you your own merchant account, or simply a payment provider outside Shopify’s default ecosystem, you’ll need to connect a third-party Shopify payment gateway to your store.
The process is more straightforward than most merchants expect. Here’s exactly how to do it.
Before You Start: What You’ll Need
A merchant account. This is your dedicated banking relationship — the account where your processed funds actually land. Your processor or acquiring bank provides this. It’s separate from the gateway itself. If you’re evaluating the best payment gateway for Shopify based on your specific business model — especially if you’re in a higher-risk product category or running a subscription — you’ll want a merchant account built for Shopify stores like yours rather than relying on Shopify’s default aggregated processing.
Gateway credentials. Once your merchant account is approved, your processor will issue you login credentials for a payment gateway — typically a username and API login key, or similar access details. Have these on hand before touching anything in Shopify.
Step 1: Log In to Your Shopify Admin Panel
Go to Admin > Settings > Payments. This is where all payment configuration lives. If you’re not yet familiar with how Shopify’s payment ecosystem is structured, it’s worth reading how Shopify Payments actually works before proceeding — understanding the difference between Shopify Payments, your merchant account, and a gateway will make the steps below much clearer.
Step 2: Disable Shopify Payments (If Active)
Click Manage next to Shopify Payments, scroll to the bottom, and select Deactivate Shopify Payments. Note that Shopify will charge a per-transaction fee once you’re on a third-party gateway — the rate depends on your plan.
Step 3: Select Your Third-Party Shopify Payment Gateway
Click Choose third-party provider. Shopify displays a list of supported payment gateways. When it comes to finding the best payment gateway for Shopify, popular options like Authorize.Net and NMI have fully built-out native integrations — no API work, no developer required. Other gateways may require an API connection or a third-party connector app. If your gateway isn’t listed, ask your processor whether they have a recommended path into Shopify.
Step 4: Enter Your Gateway Credentials
Select your gateway and enter the credentials your processor provided — typically an API login ID and transaction key, or a username and password. Double-check for typos and click Activate.
Step 5: Configure Your Settings — Including Webhooks
Before going live, review:
Test mode. Use test credentials to confirm the full checkout flow works correctly.
Payment capture. Choose between immediate capture at checkout or authorize-now/capture-later depending on your fulfillment workflow.
Currency settings. Confirm your gateway supports the currencies you need and that Shopify’s settings match.
Webhooks — don’t skip this. Webhooks are the notifications that fire between Shopify and your gateway when key events happen: payments captured, refunds issued, subscriptions renewed. When you switch gateways, these endpoints may need to be updated. Check with your processor on which webhooks they require and verify them in Settings > Notifications. A misconfigured webhook won’t break checkout — but it can cause silent failures like orders that process without syncing, or refunds that never fire.
Step 6: Test Before You Go Live — Including Declines
Always test your gateway before sending live traffic through it. Confirm the payment processes, the order appears in your admin, the transaction shows in your gateway dashboard, and confirmation emails fire.
Then test a decline. Your gateway will have test card numbers that simulate failed transactions — use them. You want to know that a declined payment shows a clean error message at checkout and doesn’t create a ghost order. How your store handles a failure matters as much as how it handles a sale.
Step 7: Add Alternative Payment Methods
Round out your checkout with ACH bank transfers (lower fees, less chargeback exposure), digital wallets like Apple Pay and Google Pay (especially strong on mobile), and PayPal as a secondary option for international buyers. For merchants scaling beyond the US, it’s also worth exploring Shopify alternatives and payment tools that support international growth.
Go Live — Then Monitor Everything
Going live isn’t the finish line. A Shopify payment gateway is not something you set up and walk away from.
In the days and weeks after launch, watch your approval rates, error codes, and chargeback rate closely. Most processors expect chargebacks below 1% of monthly transactions. If something is trending the wrong way, you want to catch it before your processor does. The merchants who keep their accounts long-term treat payment health as an ongoing priority, not a one-time task.
Common Mistakes to Avoid
1. Not checking compatibility before applying. Confirm that your processor, gateway, and Shopify are all compatible with each other before you apply — not after approval when you’re trying to connect.
2. Skipping testing. A five-minute test can save hours of troubleshooting and lost sales from a broken checkout no one told you about.
3. Not monitoring after going live. Log in to your gateway dashboard regularly. Your processor is watching these numbers — you should be too.
4. Waiting for Shopify to shut you down before making a move. If your business model or product category puts you outside Shopify Payments’ risk tolerance, it’s only a matter of time. Merchants who need a high risk payment gateway for Shopify are far better off setting one up proactively — before a shutdown happens — than scrambling to recover lost revenue after the fact.
Next Steps
The technical integration with Shopify is the easy part. Getting underwritten correctly with the right processor is what determines long-term stability. If you’re just getting started with your store, setting up Shopify correctly from the beginning — including your payment stack — sets you up to scale without hitting walls later. And if you’d like help finding the right high risk payment gateway for your Shopify store, the team at DirectPayNet works with merchants across a wide range of industries to get the right account in place and connected. Get in touch to talk through your setup.
