QuantCalc Research has published three canonical, downloadable datasets, each generated directly from the same production tax engine that powers the QuantCalc calculator — none of the figures below are typed in by hand.
State Retirement Tax Data 2026 covers all 51 U.S. jurisdictions: the top marginal income-tax rate, standard deduction, whether Social Security benefits are taxed, whether qualified retirement income is exempt, and how Roth conversions are treated, for each state.
RMD Table 2026 lists the IRS Uniform Lifetime Table III distribution period and RMD percentage of balance for every age 72 through 120, plus the SECURE 2.0 RMD start age by birth year.
IRMAA Brackets 2026 lists the Medicare IRMAA tiers: the MAGI thresholds, single and married filing jointly, and the monthly Part B and Part D surcharge that applies above each one.
Every number on all three pages comes straight out of QuantCalc's frozen tax engine, and each page documents its own generation method in its own Methodology section. All three, plus a machine-readable combined index, are listed together on the QuantCalc Data hub.
Source & Methodology
This note reports figures already published on QuantCalc's own canonical pages, retrieved 2026-07-21. It does not introduce any new figure of its own — see each linked page's own Methodology section for how its numbers are generated.
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