Employer Cost API
Calculate the true cost-to-employer for any U.S. worker
What it does
Employer Cost API calculates the true cost-to-employer for any U.S. worker. It includes employer payroll taxes (Social Security, Medicare, FUTA, SUTA), workers’ comp, employer-paid benefits, retirement match, PTO cost, and full annual and per-period breakdowns. Designed for HR SaaS, payroll tools, finance apps, and startups that need accurate compensation modeling. Simple JSON output, fast responses, and clean developer experience.
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My #2 in a string of websites I'm trying to make this year. When evaluating freelancing offers, I found myself writing a little script that did the math on how much more I'd need to charge. Days off, self employment tax, health insurance.. lots of factors. This simple web calculator does it for you. Let me know if you have any feedback or additional factors I've forgotten to add!
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