Privacy policy
Last updated September 28, 2026.
What you type into calculators
Calculations run entirely in your browser. The numbers you enter are not sent to us or stored on our servers. If you use “Copy link”, the numbers are added to the copied link so the result can be shared. Our analytics records which page you visited, not the numbers you entered.
The deductions checklist saves your ticks in your browser’s local storage so they’re there when you come back. You can clear them by clearing your browser data for this site.
Analytics
We use analytics (such as Google Analytics) to understand which pages are used, which devices people use and how they found the site. This uses cookies or similar technology and collects information like your IP address, browser and pages visited.
Advertising
We show ads from Google and may use other ad partners. These partners use cookies to show ads based on your visits to this and other sites. Learn how Google uses data at policies.google.com/technologies/partner-sites. You can turn off personalized ads at adssettings.google.com or opt out of many ad networks at aboutads.info.
Visitors in the European Economic Area, the UK and Switzerland will be asked for consent before non-essential cookies are used.
Your choices and rights
Depending on where you live (for example California and other US states with privacy laws), you may have the right to know what personal information is collected, to delete it and to opt out of its “sale” or “sharing” for targeted advertising. Contact us to make a request.
If you email us, we use your address only to reply.
Children
This site isn’t directed at children under 13, and we don’t knowingly collect their information.