Step 2 of 4 · ProjectsTax datasets
DeepCalc tax rate data
Open tax rate data as JSON and an npm package: US federal income tax, EU VAT, US sales tax for 10 states.
What it does
JSON files of tax rates: US federal income tax brackets, deductions and FICA for 2025 and 2026, VAT rates for all 27 EU states, and sales tax for 10 US states, each with a _source.md on sources and update frequency. The same data ships as an npm package and a Claude plugin. Sources named are the IRS, the European Commission, the OECD, the Tax Foundation and state revenue departments.
Where it fits on the map
Similar projects
Of the same kind, for a shared jurisdiction or tax area. Not a ranking.
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Link to this page from your README, so readers find the facts, the notes and where it fits. The badge is a small SVG served from this site.
[](https://tax-oss.com/projects/deepcalc-data/)