Advertising & Disclosure

How this site is funded

CA Tools is free to use. To cover hosting and research costs, the site shows, or may show, third-party advertising through Google AdSense. Every ad placement is labeled "Advertisement".

How the ads are chosen

We do not pick the individual ads you see. Google and its advertising partners choose them, and may use cookies to show ads based on your earlier visits to this and other websites. Our Privacy Policy explains this and links to the settings where you can turn off personalized ads.

Editorial independence

Advertisers have no influence over a calculator's formula, the figures it uses, or the results it shows you. Every number is sourced from official California agencies, as described on our Data Sources page, independent of any advertising relationship.

Official links are never sponsored

When a tool links to an official government source (DriveClean.ca.gov, CPUC, DIR, etc.), that link is never a paid placement.

No paid reviews or affiliate links

We do not publish sponsored articles, and our calculators and guides do not contain affiliate links. If that ever changes, the content will be clearly marked.

Reporting an ad

If you see an ad on this site that seems misleading or inappropriate, let us know and include the page you saw it on.