Chained CPI-U all items NSA (Dec 1999=100) — IRS bracket indexing basis

Latest value: 185.16 as of 2026-07-01, +3.3% year over year. 319 monthly observations from 1999-12 to 2026-07. Source: FRED — public data, full history downloadable as JSON on this page. Part of the Nowflation open directory.

DateValue
2026-07-01185.16
2026-06-01185.17
2026-05-01185.77
2026-04-01184.68
2026-03-01183.19
2026-02-01181.26

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