Performance Max campaigns have now expanded their demographic exclusions to include household income ranges.
Originally limited to age and gender, these exclusions allow select advertisers to exclude users within specific income brackets.
The exclusions are currently limited to a beta group and are available in several countries including the United States, Australia, and Japan. Advertisers must ensure to exclude users of “Unknown” household income ranges if this is a strict or regulatory requirement.

These changes were reflected on Google Ads’ help page, highlighting the addition under the ‘Step 3: Set your campaign settings’ section for Performance Max campaigns.
Read the official help page here: Create a Performance Max campaign with online sales or lead generation goals – Step 3: Set your campaign settings.
This update was spotted by Hana Kobzová.