The CountryTaxCalc API gives you income tax rates, social contributions, and after-tax net income for 111 countries in a single consistent JSON format — sourced directly from official government tax authorities. Whether you're building a salary comparison tool, an HR platform, or a relocation calculator, this is the data layer you need.
All the guides and tutorials below use the same API — the one available today at api.countrytaxcalc.com. Start with the free tier (no credit card required) and upgrade when you're ready to scale. The methodology page explains exactly how the underlying tax data is sourced and validated.
Tax data in examples is for informational and product integration purposes only. See the API Terms of Service for downstream disclaimer requirements when building consumer-facing products.
Compare the top income tax APIs in 2026. See why global coverage of 111 countries makes CountryTaxCalc the clear choice for international products.
Read more →The only income tax API covering all 111 countries in a single consistent JSON format. US states, Canadian provinces, and international jurisdictions.
Read more →1,000 requests/month at no cost, no credit card required. Everything you need to evaluate and prototype your integration.
Read more →Step-by-step guide to returning after-tax net income for any country. Includes Python and JavaScript examples with real API responses.
Read more →Complete Python walkthrough: authentication, POST /calculate, response parsing, error handling, and production-ready caching.
Read more →Browser fetch and Node.js examples with error handling, rate-limit headers, and a React component bonus. Includes a critical note on API key security.
Read more →Use POST /compare to rank up to 20 countries by net income in a single call. The key endpoint for building Levels.fyi-style salary tools.
Read more →Add live after-tax figures to offer letters and compensation tools. Covers distributed teams, accuracy confidence scoring, and the upgrade path from Starter to Pro.
Read more →Show candidates exactly what they'd take home after relocating. Currency conversion, multi-country comparison, and historical year data for Growth+ tiers.
Read more →The honest developer's guide to building your own tax calculator versus using an API. Real cost analysis, maintenance burden, and when each makes sense.
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