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Privacy Policy

Last updated: February 12, 2026

1. Introduction

This Privacy Policy explains how the UK Statutory Residence Test (SRT) Calculator (the "Tool") handles your data. We are committed to protecting your privacy and complying with UK and EU data protection laws, including the UK GDPR and Data Protection Act 2018.

This Tool is operated by Brad Ellison ("we," "us," or "our").

2. Data We Collect

2.1 Questionnaire Data

When you use the Tool, you enter personal information including:

  • Tax year of assessment
  • Previous UK residence status
  • UK presence periods (dates, day visits)
  • Home ownership and occupation
  • Family relationships
  • Work patterns and locations
  • Overseas travel history

✓ This data is stored locally in your browser using localStorage only. It is never transmitted to our servers or any third party.

2.2 Analytics Data

We use Vercel Analytics, a privacy-focused analytics service provided by our hosting platform. Vercel Analytics collects:

  • Page views (which pages you visit, but not your questionnaire answers)
  • Referrer source (which website you came from, if applicable)
  • Device type and browser (aggregated, non-identifying technical data)
  • Web Vitals performance metrics (page load times, etc.)

✓ Vercel Analytics does not track you across websites and does not collect personal data. All data is aggregated and anonymised.

For more information, see Vercel's Analytics Privacy Policy.

We also use PostHog for product analytics. PostHog collects anonymous usage events - for example, when a result is calculated or a subscription is started. No questionnaire answers or personal data are included in these events. Data is stored on PostHog's EU-region servers. PostHog does not use cookies on this site. For more information, see PostHog's Privacy Policy.

2.3 Account Data

If you create an account to access premium features, we collect and store:

  • Email address: Used for magic link authentication (sign-in) and account identification.
  • Session tokens: Stored in an HTTP-only cookie to keep you signed in.

This data is stored in a secure Postgres database hosted by Neon (via Vercel).

2.4 Payment Data

Subscription payments are processed by Stripe. We do not collect or store your payment card details. Stripe processes your payment information in accordance with PCI DSS standards.

We store only:

  • Your Stripe customer ID (a reference number, not card details)
  • Subscription status (active, cancelled, etc.)
  • Subscription period dates

2.5 Data We Do NOT Collect

We do not collect or store:

  • Your questionnaire answers (stored locally in your browser only)
  • Your payment card details (handled by Stripe)
  • Your IP address (anonymised by our analytics provider)
  • Any data beyond what is listed above

3. How We Use Data

We use the data described above to:

  • Questionnaire data: Calculate your SRT determination locally in your browser. This data never leaves your device.
  • Analytics data: Understand how users interact with the Tool, identify technical issues, and improve the user experience.

We do not use your data for marketing, advertising, or any purpose other than providing and improving the Tool.

4. Legal Basis for Processing

Under UK GDPR, our legal basis for processing data is:

  • Questionnaire data: Not applicable - this data is processed entirely in your browser and never leaves your device. We do not process this data.
  • Account and payment data: Contract performance (Article 6(1)(b)) - processing your email address and subscription data is necessary to provide the premium service you have subscribed to.
  • Analytics data: Legitimate interests (Article 6(1)(f)) - we have a legitimate interest in understanding how the Tool is used to improve functionality and user experience. The data collected is minimal, anonymised, and does not identify you.

5. Data Sharing

We do not sell, rent, or share your personal data with third parties, except as follows:

  • Stripe: Your email address is shared with Stripe when you subscribe, to create a customer record for payment processing. See Stripe's Privacy Policy.
  • Resend: Your email address is shared with Resend to deliver magic link sign-in emails. See Resend's Privacy Policy.
  • Vercel Analytics: Anonymised, aggregated analytics data is processed by Vercel as part of our hosting service. See their Analytics Privacy Policy.
  • PostHog: Anonymous product usage events are processed by PostHog (EU region). No personal data is included. See PostHog's Privacy Policy.
  • Legal obligations: We may disclose data if required by law, court order, or regulatory authority.

Your questionnaire answers are never shared because they never leave your browser.

6. Data Retention

  • Questionnaire data: Stored in your browser's localStorage until you clear your browser data or delete it via the Tool's interface. We have no control over this data and cannot delete it on your behalf.
  • Account data: Your email address and subscription records are retained for the duration of your account. If you cancel your subscription and request account deletion, we will delete your account data within 30 days.
  • Analytics data: Retained by Vercel in aggregated form as part of our hosting service. See Vercel's Analytics Privacy Policy.

7. Your Rights

Under UK GDPR, you have the right to:

  • Access: Request a copy of data we hold about you. (We hold no personal data about you - your questionnaire data is stored locally in your browser only.)
  • Rectification: Request corrections to any inaccurate data.
  • Erasure: Request deletion of your data. For questionnaire data, clear your browser's localStorage. For analytics data, contact us at support@taxresidency.co.uk.
  • Object: Object to processing based on legitimate interests. You can block analytics by using a browser extension or disabling JavaScript.
  • Portability: Request your data in a portable format. (Your questionnaire data is already portable - it's stored locally in your browser.)

To exercise these rights (where applicable), contact us at support@taxresidency.co.uk.

8. Data Security

Questionnaire data: Stored locally in your browser's localStorage. The security of this data depends on your device's security (passcode, encryption, etc.). We recommend:

  • Using a secure device with up-to-date software
  • Not using the Tool on shared or public computers
  • Clearing your browser data after use if on a shared device

Analytics data: Transmitted over HTTPS and processed securely by Vercel.

9. Children's Privacy

This Tool is not intended for use by individuals under the age of 18. We do not knowingly collect data from children.

10. Changes to This Policy

We may update this Privacy Policy from time to time. The "Last updated" date at the top of this page indicates when the policy was last revised. Your continued use of the Tool after changes are posted constitutes your acceptance of the updated policy.

11. Contact

If you have questions about this Privacy Policy or wish to exercise your data rights, please contact us at support@taxresidency.co.uk

12. Supervisory Authority

If you believe we have not handled your data appropriately, you have the right to lodge a complaint with the UK supervisory authority:

Information Commissioner's Office (ICO)
Website: ico.org.uk
Tel: 0303 123 1113

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