How to connect Square payments on Squarespace

intermediate 8 min read Updated 2026-03-18

Quick Answer

Connect Square payments to Squarespace by accessing Commerce settings, selecting Square as your payment processor, and authenticating your Square account. This integration allows you to accept credit cards and sync inventory between both platforms.

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Prerequisites

Active Squarespace website with Commerce plan
Square account with business verification completed
Admin access to both Squarespace and Square accounts
SSL certificate enabled on your Squarespace site

Step-by-Step Instructions

Access Commerce Settings

Log into your Squarespace admin panel and navigate to Commerce in the main menu. Click on Payments from the Commerce submenu to access payment processor options.

Ensure you're on a Commerce plan as payment processing isn't available on personal plans.

Select Square as Payment Processor

In the Payments section, locate the Payment Processors area. Click Connect next to the Square option. If Square isn't visible, click View All Payment Processors to see the complete list.

Authenticate Your Square Account

Click Connect to Square and you'll be redirected to Square's authorization page. Enter your Square login credentials and click Sign In. Review the permissions that Squarespace is requesting and click Allow to grant access.

Make sure you're logging into the correct Square account if you manage multiple businesses.

Configure Payment Settings

After successful authentication, configure your payment settings. Set your Currency, choose whether to enable Express Checkout options, and configure Payment Methods (credit cards, digital wallets). Click Save to apply the settings.

Enable Apple Pay and Google Pay for faster checkout experiences on mobile devices.

Set Up Inventory Sync

In the Square integration settings, locate Inventory Sync options. Choose whether to sync inventory from Square to Squarespace or vice versa. Select Two-way sync if you want inventory updates to reflect in both systems automatically.

Test inventory sync with a few products first before enabling it for your entire catalog.

Configure Tax Settings

Navigate to Commerce > Tax and ensure your tax settings align with your Square configuration. Enable Automatic tax calculation if you want Square to handle tax calculations based on customer location.

Test the Payment Integration

Create a test order by adding a product to your cart and proceeding to checkout. Use Square's test credit card number 4532 1234 5678 9012 with any future expiry date and CVV 123. Verify the transaction appears in both Squarespace and Square dashboards.

Always test both successful and failed payment scenarios to ensure proper error handling.

Go Live and Monitor

Once testing is complete, disable test mode in both Squarespace and Square settings. Monitor your first few live transactions to ensure payments are processing correctly and inventory is syncing as expected. Set up email notifications for failed payments.

Keep both Square and Squarespace apps installed on your phone to monitor transactions on the go.

Common Issues & Troubleshooting

Square option not appearing in payment processors

Verify you're on a Commerce plan and your region supports Square integration. Clear your browser cache and try again, or contact Squarespace support if the issue persists.

Authentication fails during Square connection

Ensure your Square account is fully verified with business information. Try using an incognito browser window and disable any browser extensions that might interfere with the authentication process.

Inventory sync not working between platforms

Check that products have matching SKUs in both systems. Go to Commerce > Inventory and click Sync Now to manually trigger synchronization. Verify API permissions are correctly set in Square.

Payments failing at checkout

Verify your Square account is active and not in restricted mode. Check that SSL is enabled on your Squarespace site and test with different payment methods. Review Square's transaction logs for specific error messages.

Prices mentioned in this guide are pulled from current plan data and may change. Always verify on the official Squarespace website before purchasing.

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