Tax Brackets Comparison Tool

What it does

Analyze how different tax regimes affect your net income. Compare Ireland versus Australia, single versus married structures, or residency statuses. Adjust the income slider to see real-time updates and marginal tax impacts across different financial years.

• CF
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  I wanted to share a simple web app I created recently, which lets you estimate income taxes owed in the US: https://taxsim.app All the calculations occur directly in the browser, and are powered by a Fortran program that has been converted to WASM using emscripten. This calculator was originally developed in the 1970s [1] by the non-profit National Bureau of Economic Research. NBER has been maintaining this F77 codebase for the last 50 years, and uses it primarily for academic research on tax policy. The Fortran source code itself is over 1MB of text, because it codifies both…

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