Privacy Policy
Your privacy is important. This page explains how this application handles your data.
No Data Collection
All calculations run entirely in your browser. No personal or financial data is sent to any server.
No Cookies
This application does not set any cookies. Your theme preference (light/dark mode) is stored in your browser's local storage and is not transmitted anywhere.
No Analytics or Tracking
We do not use any analytics services, tracking pixels, or advertising scripts.
Exchange Rate Lookups
When you request an exchange rate, a server-side proxy fetches the rate from HMRC or a public exchange rate API. Only the currency code and date are transmitted — no personal or financial data is included.
Stock Price Lookups
When you request a stock price, a server-side proxy fetches the price from Yahoo Finance. Only the stock ticker symbol is transmitted — no personal or financial data is included. Yahoo Finance may log these requests according to their own privacy policy.
Share Links
If you choose to create a share link, your trades are encoded into the link itself, after the #. Browsers never transmit that part of a URL, so the trades in a share link are never sent to this site or to Cloudflare — but they are readable by anyone who has the link. A share link cannot be revoked, expired or tracked by us, because we never receive it. Only send one to someone you would show a brokerage statement to.
Hosting
This site is hosted on Cloudflare Workers. Cloudflare may set strictly-necessary infrastructure cookies for security and performance purposes. These are not controlled by this application. See Cloudflare's privacy policy for details.
Open Source
The calculation engine is open source and can be audited at github.com/damiantanase/capital-gains-calculator.
Contact
For privacy-related questions, please get in touch via the contact page.