Changelog
What changed, and when
A record of every correction and data update, so any figure on the site can be traced.
2026-11-07 — Initial publication
- Published the 2026 and 2027 parameter sets, verified against the SSA COLA fact sheets.
- Added the 1980–2027 wage base series and the 2023–2026 archive pages.
- Added 14 reference pages, 14 scenario pages and 6 SSDI pages.
- Built nine calculators, including reverse benefit, self-employment tax, earnings test, benefit taxation and a trust-fund scenario model.
- Built the payment-date calendar from the published rule set, including federal holiday shifts.
- Published 12 claim checks with primary-source links.
- Corrected the single-filer benefit taxation thresholds to $25,000 / $34,000 after an internal audit.
- Added sitemap, robots, structured data, 404 handling and the admin console.
Correction policy
A figure is only changed when a primary source shows a different value. Each correction is dated here with the reason, and the page that changed keeps its URL.
Verification date
All figures on this site were last checked on 2026-11-07. The next scheduled check is the January 2027 payment cycle and the October 2027 announcement of 2028 parameters.