Numeratica — Retirement & Tax Calculations

76 deterministic US retirement and tax calculators — Monte Carlo projections, federal and 50-state income tax, Social Security, RMDs, IRMAA, Roth conversions, and equity comp (ISO/AMT, RSU, ESPP). Every year-keyed figure traces to its IRS or SSA source and every result carries a reproducible result_id, so the model calls the engine instead of doing the arithmetic itself.

First seen 2 Oct 2026. Evidence as of 2 Oct 2026.