Global Tax Data, Unfolded
Choose Your Country
Select a country to see a detailed 2026 income tax breakdown with bracket visualization.
Not Just Another Tax Calculator
We combine real government tax tables with AI that cites its sources. Every number is deterministic. Every explanation is grounded.
Deterministic Math
Every tax figure is computed from official statutory bracket tables stored in our database — never hallucinated.
Cited Sources
AI explanations are grounded in IRS Publications, OECD datasets, and official government tax guides.
5-Country Coverage
Compare income tax across the US, Spain, Germany, UK, and France — with country-specific deductions and social contributions.
Instant Results
Sub-200ms response times with intelligent caching. Recalculate as you adjust your income with zero lag.
Popular Tax Comparisons
See how income taxes stack up between countries — with AI-powered explanations.
How It Works
Two paths, one answer. Math you can verify, context you can trust.
Enter Your Income
Choose your country, filing status, and gross income. Use the slider or type a precise amount.
Deterministic Calculation
Our engine applies official 2026 tax brackets from IRS/OECD data stored in Postgres. No AI involved in the math — pure statutory rates.
AI-Grounded Explanation
Vertex AI Search reads IRS publications and OECD reports to generate context — with page-level citations you can verify.
Results with Sources
Get a complete breakdown: bracket details, effective rate, net income, deductions, and social contributions — all with source documents.
Best Places to Live & Work
Discover which US state or country gives you the most take-home pay. Compare total tax burdens across all 50 states — including federal, state, and FICA taxes.
Explore Best PlacesTax Guides & Insights
Expert guides on international taxes, bracket strategies, and take-home pay optimization.
How Tax Brackets Actually Work
Most people misunderstand progressive taxation. Learn how brackets really work with examples.
ComparisonUS vs Europe: Who Pays More?
The reality is more nuanced than you think when you factor in healthcare and social security.
ComparisonTake-Home Pay on $100K
How much do you actually keep from $100K in the US, UK, Germany, France, and Spain?
Ready to Unfold Your Tax Data?
Free, instant, and grounded in real government publications. No signup required.