Last updated: 24 August 2026
Calculator information
Contractor Calculator does not use cookies or local storage to save calculator entries or results. Values are processed in the browser and are no longer available after leaving or refreshing the page.
Cookieless analytics
PostHog Cloud EU is configured to measure site usage without cookies. It does not receive calculator inputs or results. Optional post-result feedback contains only three categorical answers. Session recording and visitor profiles are disabled. See the Privacy notice for more detail.
Advertising cookies and storage
Google AdSense and participating advertising partners may use cookies or similar local storage to deliver and measure advertisements, prevent fraud and, where consent has been given, personalise advertising. The services used can vary according to location, consent choice and browser settings.
The consent message displayed where required provides advertising choices and a route to change them. Google explains how AdSense uses cookies in its publisher guidance.
Advertising consent can be changed or withdrawn at any time using the Privacy & cookie settings control.