BigCommerce Improves Google Pay Checkout to Prevent Address Overrides

How it works today

Here’s the current behaviour in some scenarios at BigCommerce checkout:

• A shopper manually fills in billing and shipping address fields

• The shopper opens the Google Pay modal and selects a different credit card

• The billing and shipping addresses on the checkout page update to the address tied to that newly selected card in Google Wallet

For some stores, this can create mismatches between what the shopper entered and what Google Pay applies. It can also create additional issues such as:

• Trigger incorrect shipping rates

• Cause custom checkout fields to disappear

• Interrupt fraud validation logic

• Create shopper confusion at the final step

What’s changing

When a shopper uses Google Pay at BigCommerce checkout:

• Checkout preserves any existing billing and shipping addresses

• Checkout will no longer accept address overrides from Google Wallet

• Google Pay only populates addresses when the checkout address fields are empty.

In other words, Google Pay’s behaviour will now become “fill if empty,” instead of, “override what’s already there.”

Why this matters

This change helps prevent unintended address updates that can affect the shopper’s checkout experience and downstream operations, including:

• Additional form fields that display based on address values

• Shipping rates and eligibility that change by region, local area, or address type

• Fraud checks that rely on consistent billing and shipping details

It also improves consistency across express payment methods, reduces support issues tied to address mismatches, and gives enterprise customers more control over address-handling logic. Most importantly, it helps protect shopper trust by avoiding silent address changes.

Rollout and availability

Our new Google Pay shopper address flow expands to all eligible stores beginning April 27, 2026..

What you need to do

For most customers, no action is required.

If you have checkout customisations or downstream systems that rely on the previous Google Pay address behaviour, plan to test your checkout flow once the change is enabled for your store — especially if you rely on:

• Address-triggered custom fields

• Shipping logic based on address updates

• Fraud tooling that expects Google Wallet to rewrite billing details

This update is part of our ongoing commitment to delivering predictable, merchant-controlled checkout experiences — without sacrificing express payment convenience.

To learn more about how Big Commerce is improving the checkout experience read: Excel in Ecommerce Checkout Optimisation: Proven Steps to Build Trust and Boost Sales.