Alternatives
Products that do what Spaife does
One running tax estimate across everything you earn
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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…
2022
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2015 · incometaxcalculator.net.in
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Fast, private income tax estimation built for freelancers.
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Know your profit and tax, in seconds. Free.
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A Google Sheets budget tracker built for irregular income
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Free hourly to salary & take-home tax calculator
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Calculate your 1099 tax bill in seconds
May 2026 · calc1099.com
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