Google Ads has relocated payment method management to a new section under Billing > Settings.

Previously accessible under a separate “Payment methods” tab, all billing-related details, including primary and backup payment options, can now be found in the unified Settings page.
This update is aimed at streamlining the billing interface, though it may require users to adjust their navigation habits. A banner alert currently highlights the change.
To view or edit your payment information, go to Billing > Settings in your Google Ads account.
This change was observed by Hana Kobzová.