About Tax121
Making international tax simple, transparent, and accessible for everyone.
Our Mission
Tax systems are complex. They vary dramatically from country to country, change every year, and come with layers of allowances, deductions, and social contributions that make it nearly impossible for individuals to quickly understand their actual tax burden.
Tax121 was created to solve this problem. We believe that everyone deserves free access to accurate, easy-to-use tax calculators -- whether you are planning a move abroad, comparing job offers in different countries, or simply trying to understand your take-home pay.
Our calculators are built by tax enthusiasts and software engineers who are passionate about making financial information accessible. We source our data directly from official government publications and tax authorities, and we keep it updated as rates and rules change.
40+
Countries Supported
6
Tax Types
100%
Free to Use
2025
Tax Year Data
What We Stand For
The principles that guide everything we build
Accuracy First
Every calculator is built using official government tax rates and thresholds. We verify our data against published tax legislation and update it promptly when rates change.
Instant & Accessible
No sign-ups, no paywalls, no clutter. Get your tax calculation in seconds with a clean, intuitive interface that works on any device.
Truly International
We cover countries across Europe, North America, the Middle East, Asia-Pacific, and beyond. Whether you are an expat, freelancer, or digital nomad, we have you covered.
Educational
Beyond calculations, we provide guides and articles that explain how tax systems work, help you understand your obligations, and keep you informed about changes.
What We Offer
Income Tax Calculators
Detailed income tax calculations including progressive tax bands, personal allowances, and deductions. See exactly how much tax you owe at each band and your effective tax rate.
Social Contribution Calculations
Many of our calculators include national insurance, social security, and other mandatory contributions so you see the full picture of your deductions.
Visual Breakdowns
Interactive charts and detailed band-by-band breakdowns make it easy to understand where your money goes. Compare gross income vs net income at a glance.
Tax Guides & Articles
Our blog covers tax residency rules, country comparisons, tips for expats, and analysis of recent tax changes to help you make informed decisions.
Our Team
Tax121 is built by a small, dedicated team of software engineers and tax enthusiasts who believe financial tools should be free and accessible. We combine deep technical expertise with genuine interest in international tax systems.
We are constantly expanding our coverage to new countries and tax types. If you have feedback, spot an error, or want to suggest a new calculator, we would love to hear from you.