Terms of Use

With paid tiers (Fish & Chips and High Tea), all calculations run entirely in your browser — no data is sent to the server and nothing is stored.

See our privacy article for full details.

If you choose to sign in with Google, the following applies to how we handle your Google user data.

Data Accessed

We use Google Identity Services solely for authentication. When you sign in with Google, we receive a limited ID token containing:

• Your email address
• Your display name (if provided by your Google account)

We do not request access to any other Google services such as Google Drive, Google Sheets, Gmail, or any other Google API.

Data Usage

Your Google user data is used exclusively to:

• Authenticate your identity and create a user session
• Display your name or email in the application header so you can confirm you are signed in

Your Google user data is not used for advertising, analytics, profiling, or any purpose other than authentication.

Data Sharing

Your Google ID token is passed to our authentication provider, Supabase, to verify your identity and manage your session. Apart from Supabase, we do not share your Google user data with any other third parties.

Data Storage & Protection

Your email address and display name are stored securely within Supabase’s authentication system, which provides encryption at rest and in transit. No Google user data is stored in local files, cookies, or any other location beyond the authenticated session.

All communication between your browser, Google, and our authentication provider occurs over HTTPS.

Data Retention & Deletion

Your Google authentication data is retained only for as long as your account exists. You may request deletion of your data at any time by contacting us at our contact page. Upon receiving a deletion request, we will remove all data associated with your account from our authentication system.

You can also revoke CGT Calculator’s access to your Google account at any time through your Google Account permissions page.

This calculator is provided for informational purposes only. The results should not be considered as professional tax advice.

Always consult with a qualified tax professional for advice specific to your situation.

By using this calculator, you agree to these terms.