Your Data Stays
In Your Browser
Client-side calculations mean zero server-side data storage. Not one byte of your financial information leaves your device.
The 30-Second Version
Everything you need to know at a glance
What We DON'T Do
- Store your tax calculations on servers
- Sell, share, or monetize your data
- Track you across other websites
- Require account creation or login
- Use third-party advertising networks
- Employ dark patterns or deceptive practices
What We DO
- Calculate everything in your browser
- Use privacy-focused analytics (Umami)
- Respect Do Not Track settings
- Provide complete transparency
- Keep the site forever free
- Maintain open-source code
How We Protect Your Privacy
Four architectural decisions that make your data truly private
Client-Side Calculations
All tax calculations run in your browser using JavaScript. Your salary, tax code, and personal details never leave your device.
Zero Server Storage
We don't store your tax data on our servers. Calculations happen locally, results display instantly, nothing gets saved remotely.
Optional Analytics
Anonymous usage data (page views, device type) only with your consent. You can decline entirely - the calculator works exactly the same.
Privacy by Design
Your privacy isn't a feature we added - it's built into the architecture. We literally cannot see your tax calculations.
Where Your Tax Data Goes
Spoiler: Nowhere. Here's the technical breakdown.
Your Device
All calculations happen here in your browser. Your salary, tax code, and personal details never leave this device.
Our Servers
We only send you the calculator app. No tax data, no personal information, no calculation results stored.
Analytics (Optional)
Privacy-focused Umami analytics tracks anonymous page views only if you consent. No personal data, no cross-site tracking.
What We Track (With Your Permission)
Anonymous analytics that respect your privacy
Analytics Tools
We use Google Analytics 4 (with Consent Mode), Vercel Analytics for Web Vitals, and Sentry for error monitoring. GA4 only tracks after you accept cookies. Vercel Analytics is cookieless and collects no PII.
What We Track
Page views, anonymized salary ranges (not exact values), calculator usage patterns, and performance metrics. Sentry may capture session replays (1% sample) for debugging - no financial data is recorded.
Your Control
Decline analytics via our cookie banner to block GA4 tracking entirely. Vercel Analytics runs regardless but collects no personal data. The calculator works identically either way.