Built for Privacy
Designed for You
We're not here to collect your data. We're here to help you understand your take-home pay with zero compromises on privacy.
Free forever. No premium tiers. No paywalls. Just honest tax calculations built with care.
- 100%Free. No Premium Tiers
- 0Data Stored
- HMRCOfficial Rates
- <300kBBundle Size
What We Stand For
The principles that guide every decision we make
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 technically impossible for us to see it.
Radical Transparency
Our code is public. Our analytics are honest. No tricks, no fees. 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.
What Makes Us Different
Features you won't find in other tax calculators
£100k Tax Trap Detector
Automatically warns when you're in the 60% effective tax rate zone (£100k-£125k) and shows optimal pension contributions to legally reduce your tax bill.
What-If Comparisons
Compare job offers, raises, or "what if I earned X more?" scenarios instantly. See exactly how much of every extra pound you actually keep.
Every Deduction Covered
Student loans (all plans), Scottish tax, pension contributions, marriage allowance, blind allowance — all calculated correctly, all in one place.
Built with Modern Technology
Professional tools for a free service
Next.js 16 & React 19
Server Components, React Compiler, async request APIs. Built with the latest tech for maximum performance and developer experience.
TypeScript Strict Mode
Type-safe calculations mean fewer bugs. Your numbers are right, every time.
Modern Development
Biome for linting/formatting (10/10 strictness), Playwright for E2E testing, Sentry for error monitoring. Professional tooling for a free service.
Zod Validation
Every input validated at runtime with comprehensive schemas. Type safety meets runtime safety for bulletproof calculations.
Hey, I'm Jarryd
I built PayeTax because I was frustrated with existing tax calculators — they were either riddled with ads, demanded my email, or felt stuck in 2010.
So I created the calculator I actually wanted to use: fast, private, accurate, and genuinely free. Every feature exists because it solves a real problem I encountered when trying to understand UK taxes.
Why this matters
Understanding your take-home pay shouldn't require sacrificing your privacy or navigating subscription walls. Whether you're negotiating a raise, comparing job offers, or just curious about your tax breakdown — you deserve a tool that respects your time and data.
No VC funding. No premium tiers. No data harvesting. Just a useful tool built with care, because it needed to exist.
Questions or Feedback?
We're always improving. If you have suggestions, found a bug, or just want to say hi, reach out!