Privacy Policy

Last updated: 2026-10-14

This notice explains how UK Tax Tools ("we", "us", "the site") collects and uses personal data. The site is operated from the United Kingdom and this policy is governed by the UK General Data Protection Regulation (UK GDPR) and the Data Protection Act 2018.

1. What we collect

We collect the following categories of data:

• Calculator inputs — salary, age, filing circumstances, etc. These never leave your browser. They are stored in your URL (so you can share a link to a result) and may be persisted in localStorage on your device. We do not receive, transmit, or log them on any server.
• Analytics — Google Analytics 4 collects anonymised usage data (page viewed, referrer, device type, country-level IP, session duration). See section 3.
• Advertising — Mediavine and its advertising partners may set cookies to deliver and measure ads. See section 4.
• Error diagnostics — if a page's JavaScript fails, a technical error report (the error message, the page URL, browser and OS version) is sent to Sentry so we can fix it. It carries no calculator inputs, sets no cookies, and we do not ask Sentry to store your IP address. Sentry's processing is governed by its Privacy Policy.
• Server logs — our hosting provider (Cloudflare Pages) logs request metadata (IP, user-agent, referer, timestamp) for up to 30 days for abuse prevention and debugging.
• Email correspondence — if you email us, we keep the message until the matter is resolved (typically up to 12 months).

2. Lawful bases

• Consent (UK GDPR Art. 6(1)(a)) — for advertising cookies. Where Mediavine shows its consent banner — in regions covered by the GDPR, UK GDPR, or similar consent laws — you can accept or reject personalised advertising there, and withdraw that consent at any time from the privacy link in it.
• Legitimate interests (Art. 6(1)(f)) — for server logs and error diagnostics (fraud/abuse prevention and service reliability).
• Consent/contract — for email correspondence you initiate.

3. Google Analytics 4

We use Google Analytics 4 (property G-402Z110JCT) to understand aggregate usage: which pages are viewed, where visitors arrive from, device type, country-level location and session length. Analytics runs only on the live uktax.tools site. IP addresses are truncated by Google before logging, and data retention in GA4 is set to the minimum permitted (2 months for event data, 14 months for user-level data). We never cross-reference analytics data with a named individual.

Google, as the data processor, may transfer data to the United States under the EU–US Data Privacy Framework and UK Extension. See Google's Privacy Policy.

4. Advertising

This site is funded by advertising. We work with Mediavine, an advertising partner that serves and measures the ads on our pages. Mediavine and its advertising partners may use cookies, device identifiers and similar technologies to deliver ads, limit how often you see the same ad, and measure whether an ad was seen.

Those partners may process your IP address, browser and device type, approximate location and your interactions with ads, each under its own privacy policy. Mediavine's policy is at mediavine.com/privacy-policy, and the current list of partners is available from that banner where it is shown.

Where Mediavine shows its consent banner, it asks you to accept or reject personalised advertising before an advertising cookie is set, and personalised ads are not enabled unless you consent to them. You can change or withdraw that choice at any time from the privacy link in the banner. You can also opt out of third-party vendor cookies more broadly at youradchoices.com.

Mediavine Programmatic Advertising (Ver 1.1)

The Website works with Mediavine to manage third-party interest-based advertising appearing on the Website. Mediavine serves content and advertisements when you visit the Website, which may use first and third-party cookies. A cookie is a small text file which is sent to your computer or mobile device (referred to in this policy as a “device”) by the web server so that a website can remember some information about your browsing activity on the Website.

First party cookies are created by the website that you are visiting. A third-party cookie is frequently used in behavioral advertising and analytics and is created by a domain other than the website you are visiting. Third-party cookies, tags, pixels, beacons and other similar technologies (collectively, “Tags”) may be placed on the Website to monitor interaction with advertising content and to target and optimize advertising. Each internet browser has functionality so that you can block both first and third-party cookies and clear your browser’s cache. The "help" feature of the menu bar on most browsers will tell you how to stop accepting new cookies, how to receive notification of new cookies, how to disable existing cookies and how to clear your browser’s cache. For more information about cookies and how to disable them, you can consult the information at All About Cookies.

Without cookies you may not be able to take full advantage of the Website content and features. Please note that rejecting cookies does not mean that you will no longer see ads when you visit our Site. In the event you opt-out, you will still see non-personalized advertisements on the Website.

The Website collects the following data using a cookie when serving personalized ads:

• IP Address
• Operating System type
• Operating System version
• Device Type
• Language of the website
• Web browser type
• Email (in hashed form)

Mediavine Partners (companies listed below with whom Mediavine shares data) may also use this data to link to other end user information the partner has independently collected to deliver targeted advertisements. Mediavine Partners may also separately collect data about end users from other sources, such as advertising IDs or pixels, and link that data to data collected from Mediavine publishers in order to provide interest-based advertising across your online experience, including devices, browsers and apps. This data includes usage data, cookie information, device information, information about interactions between users and advertisements and websites, geolocation data, traffic data, and information about a visitor’s referral source to a particular website. Mediavine Partners may also create unique IDs to create audience segments, which are used to provide targeted advertising.

If you would like more information about this practice and to know your choices to opt-in or opt-out of this data collection, please visit National Advertising Initiative opt out page. You may also visit Digital Advertising Alliance website and Network Advertising Initiative website to learn more information about interest-based advertising. You may download the AppChoices app at Digital Advertising Alliance’s AppChoices app to opt out in connection with mobile apps, or use the platform controls on your mobile device to opt out.

For specific information about Mediavine Partners, the data each collects and their data collection and privacy policies, please visit Mediavine Partners.

5. Cookies

A full list of cookies we may set, their purpose, and their duration is available on our Cookie Policy page. Where Mediavine's consent banner is shown, you can accept, reject, or change your advertising preferences at any time from the privacy link in it.

6. International transfers

Analytics and advertising data may be processed outside the UK/EEA (primarily in the United States). Transfers rely on the UK Extension to the EU–US Data Privacy Framework or on the UK Addendum to the EU Standard Contractual Clauses.

7. Your rights

Under UK GDPR you have the right to:

• access the personal data we hold about you
• request correction of inaccurate data
• request erasure
• restrict or object to processing
• withdraw consent for cookie-based tracking at any time
• lodge a complaint with the Information Commissioner's Office (ico.org.uk, 0303 123 1113)

To exercise any of these rights, you may lodge a complaint or request directly with the ICO (ico.org.uk, 0303 123 1113), who will liaise with the site operator on your behalf.

8. Children

UK Tax Tools is not directed at children under 13. We do not knowingly collect data from children. If you believe a child has provided us with data, please contact us and we will delete it.

9. Changes to this policy

We may update this policy to reflect changes in our practices, hosting, or the law. The "Last updated" date at the top indicates the most recent revision.

10. Complaints

UK Tax Tools is not required to appoint a Data Protection Officer. For privacy complaints or rights requests, contact the Information Commissioner's Office (ico.org.uk, 0303 123 1113), who is the UK supervisory authority for data-protection matters.