Privacy

Do your own bills is a free, independent, non-commercial site. We collect as little as we can. For anything about your data, email corrections@doyourownbills.org.uk.

The calculator

The calculator runs entirely in your browser. The prices, people and weeks you enter are never sent to us or anyone else, and they're gone when you close the page. If you use the postcode box, the page downloads a list of every postcode area in Great Britain and looks yours up in your browser; your postcode isn't sent to us or anyone else. To save you choosing again, your browser remembers the postcode, energy region and water companies, on your device only. Clearing your browser's site data removes them.

When you visit

Like any website, our host handles your IP address and browser details to deliver pages and keep the site secure, and keeps short-lived logs. Our reason is our legitimate interest in running the site securely. There are no adverts, social media widgets, visitor statistics or cookies.

If you email us

If you report a mistake, we get your email address, your name if you give it, and your message. We use them only to check the correction and reply to you, because we have a legitimate interest in keeping the site accurate. Your email passes through our email provider, but we don't share it with anyone else, and we delete it once the correction is dealt with.

Our providers

The companies that host the site and deliver our email handle data for us and only on our instructions. They may process it outside the UK, under safeguards approved for UK data protection law.

Your rights

You can ask to see, correct or delete what we hold about you, or object to how we use it. If you're unhappy with how we've handled your data, you can complain to the Information Commissioner's Office.

Last updated 10 October 2026.