Privacy policy: IR35 Calculator

Last updated: June 2026

We know privacy policies can feel like a bit of a slog to read. So we kept this one short and honest. If you use our IR35 Calculator, this page tells you exactly what we collect, why we collect it, and what we do with it. No legal jargon. No buried clauses. Just plain English.

Who we are

We run the IR35 Calculator website, a free tool that helps UK contractors and freelancers estimate their take-home pay inside and outside IR35. We are not a law firm or a regulated tax adviser. The tool gives you a general estimate to help you understand your position.

If you have any questions about this policy, you can reach us at hello@ir35calculator.co.uk.

What information we collect

We only collect what we actually need.

Information you give us directly

When you use the calculator you enter information such as your day rate, your contract type and your working arrangements. We are not asking you for your name, email address or any other contact details just to run a calculation. If you contact us or sign up for updates, we may collect:

• Your name
• Your email address
• Any message or question you send us

Information collected automatically

When you visit the site, some basic technical data is collected automatically. This includes:

• Your IP address
• Browser type and version
• Pages you visit on our site
• Time and date of your visit
• The website you came from

We collect this through cookies and similar tools. More on that below.

How we use your information

• To run the calculator so that the tool works properly when you use it
• To improve the site by understanding how people navigate it
• To respond to you if you send us a question or query
• To send updates only if you have actively opted in
• To display ads through Google AdSense (explained below)

Google AdSense and advertising

This website displays adverts through Google AdSense. Google uses cookies to serve ads based on your browsing history across the internet, including previous visits to this site.

You can opt out of personalised advertising at any time through Google's Ads Settings or the Network Advertising Initiative opt-out page.

We do not control which cookies Google places on your device. Google's own privacy policy covers that.

Cookies

We use cookies on this site. A cookie is a small text file stored on your device when you visit a website. Here is how we use them.

Essential cookies

These are needed for the website to function. Without them, parts of the calculator may not work correctly.

Analytics cookies

We use Google Analytics to understand how people use the site. This helps us make improvements. The data is anonymised, and we cannot identify individual visitors from it.

Advertising cookies

Google AdSense places cookies to serve relevant ads based on your browsing behaviour. We do not control these directly.

You can turn off or manage cookies through your browser settings at any time. Be aware that disabling cookies may affect how some parts of the site work.

How long do we keep your data

• Contact enquiries are kept for up to 12 months, then deleted
• Analytics data is retained for up to 26 months (the Google Analytics default)
• Email subscribers are kept until you unsubscribe

Your rights under UK GDPR

If you are in the UK, you have the following rights over your personal data:

• Access — you can ask what data we hold about you
• Correction — you can ask us to fix inaccurate data
• Deletion — you can ask us to delete your data
• Restriction — you can ask us to limit how we use it
• Objection — you can object to how we process it
• Portability — you can ask for a copy of your data in a usable format

To exercise any of these rights, email us at hello@ir35calculator.co.uk. We will respond within 30 days.

If you are unhappy with how we have handled your data, you have the right to raise a complaint with the Information Commissioner's Office.

Children's privacy

This website is not intended for children under 13. We do not knowingly collect personal data from children. If you believe a child has submitted personal information through this site, please contact us and we will delete it promptly.

Links to external sites

We occasionally link to external websites, including HMRC tools and government guidance pages. Once you leave this site, this policy no longer applies. We recommend reading the privacy policy of any site you visit.

How this fits with our other policies

This privacy policy covers how we handle your personal data. For everything that governs your use of this website and the calculator tool, our terms and conditions cover that in detail.

Changes to this policy

We may update this policy from time to time. When we do, the "last updated" date at the top of this page will change. We recommend checking back occasionally if you use the site regularly.

Contact us

Got a question about this policy? Email hello@ir35calculator.co.uk. We aim to reply to all privacy-related queries within 5 working days.