Tax Calculations
Built for Privacy
The UK tax calculator that respects your privacy, delivers instant accuracy, and costs nothing. No compromises.
With intelligent tax trap detection, salary comparisons, and adaptive theming.
Our Mission
Every UK taxpayer deserves instant, accurate tax calculations without sacrificing privacy or paying a penny. We're building the most transparent, accessible, and trustworthy tax calculator in the UK.
What Makes Us Different
Features you won't find anywhere else - completely free
£100k Tax Trap Optimizer
Automatically detects when you're in the 60% effective tax rate zone (£100k-£125k) and calculates optimal pension contributions to save thousands.
Read our complete £100k tax trap guide →Salary Comparison
Compare job offers or raises with 3 input modes (%, £ amount, total). See marginal rates and exactly what you keep from every increase.
Try it now →Adaptive Theming
Light, dark, or system-matched themes. Your calculator, your eyes, your choice. Smooth transitions, zero flash, perfect accessibility.
Check the footer ↓What We Stand For
Four principles that guide everything we build
Privacy is Sacred
Every calculation runs in your browser. We never see your salary, tax code, or personal details. This isn't a promise - it's architectural impossibility.
Radical Transparency
Open-source philosophy, honest analytics, and clear documentation. No dark patterns, no hidden fees, no corporate speak. Just honest tax calculations.
Accuracy First
Official HMRC rates updated within 24 hours of changes. Comprehensive testing for Scottish rates, student loans, pensions, and edge cases.
Genuinely Free
No premium tiers, no paywalls, no "upgrade to see more". Every feature is free for everyone, forever. Tax calculations should be accessible to all.
Built for Performance
Cutting-edge web technologies for exceptional speed, security, and experience
Blazing Fast
Sub-second page loads, instant calculations, 60fps animations
Modern Stack
React 19, TypeScript, Tailwind CSS v4, cutting-edge architecture
Lighthouse Score
Performance, accessibility, SEO, and best practices
Powered By
Why We Built PayeTax
As UK taxpayers and software engineers, we were frustrated by online tax calculators. They were slow, cluttered with ads, required personal information, or hid features behind paywalls.
We knew it didn't have to be this way. Tax calculations should be instant, accurate, and completely private. No accounts, no tracking, no compromises.
Today, PayeTax helps thousands of people across the UK understand their take-home pay, plan salary negotiations, compare job offers, and make informed financial decisions - all while respecting their privacy.
In v2.0.0, we added intelligent tax trap detection and salary comparison tools - features that would cost £50+/month elsewhere, completely free for everyone. Because we believe tax planning should be accessible to all.
We're continuously improving based on your feedback. Every feature request matters, every bug report helps, and every suggestion makes PayeTax better for everyone.
Ready to Calculate Your Take-Home Pay?
Free, fast, and completely private. No sign-up required.
Try the Calculator →Get in Touch
Questions, feedback, or suggestions? We'd love to hear from you.