Developer Builds Browser-Only Payroll Calculator Covering All 50 U.S. States

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A developer has created PayCalc, a client-side payroll calculator built with Next.js that performs complete U.S. payroll computations entirely within the browser, sending no financial data to external servers. The tool covers all 51 U.S. jurisdictions and incorporates 2026 IRS federal tax brackets, FICA caps, and state-specific tax codes. Calculations execute in under 5 milliseconds by running pure TypeScript logic locally, eliminating the server round-trips common in most online paycheck tools. The application also supports reverse Net-to-Gross calculation using a binary search algorithm that converges on the correct gross figure in 12 to 15 iterations. Dynamic OpenGraph social cards are generated at the edge for each state page, displaying jurisdiction-specific tax statistics when links are shared on social platforms.

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