Inflation · SUUR0000SA0
Chained CPI (C-CPI-U)
As of Sep 2026, the chained CPI (C-CPI-U) had risen 3.5% from a year earlier, compared with a 12-month change of 3.3% in Aug 2026. The latest value was 186.755 (index Dec 1999=100).
Source: U.S. Bureau of Labor Statistics via FRED®. Monthly data, not seasonally adjusted. Latest observation Sep 2026; snapshot taken Oct 27, 2026, 2:15 AM EDT.
Latest (Sep 2026)
186.755
Change from Aug 2026
+0.5%
A year earlier
180.373
12-month change
+3.5%
186.755 Sep 2026 · Index Dec 1999=100
Index Dec 1999=100. Data from Dec 1999 to Sep 2026 (321 observations).
What it measures
The chained CPI accounts for shoppers switching between items when relative prices change, so it usually rises a little more slowly than the regular CPI. It is used to adjust federal income tax brackets each year.
- Official title
- Chained Consumer Price Index for All Urban Consumers: All Items
- Units
- Index Dec 1999=100
- Frequency and adjustment
- Monthly, not seasonally adjusted
- Original source
- U.S. Bureau of Labor Statistics
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| Date | Value | Change | From a year ago |
|---|---|---|---|
| Sep 2026 | 186.755 | +0.5% | +3.5% |
| Aug 2026 | 185.739 | +0.3% | +3.3% |
| Jul 2026 | 185.162 | -0.0% | +3.3% |
| Jun 2026 | 185.172 | -0.3% | +3.5% |
| May 2026 | 185.771 | +0.6% | +4.1% |
| Apr 2026 | 184.680 | +0.8% | +3.7% |
| Mar 2026 | 183.193 | +1.1% | +3.2% |
| Feb 2026 | 181.258 | +0.5% | +2.3% |
| Jan 2026 | 180.409 | +0.4% | +2.3% |
| Dec 2025 | 179.775 | -0.1% | +2.6% |
| Nov 2025 | 179.889 | -0.3% | +2.7% |
| Sep 2025 | 180.373 | +0.3% | +3.0% |
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This page shows public economic data for general information. It is not financial advice and does not predict future values.
Sources
- U.S. Bureau of Labor Statistics, Chained Consumer Price Index for All Urban Consumers: All Items [SUUR0000SA0], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/SUUR0000SA0, Oct 27, 2026.
- View SUUR0000SA0 on FRED® · U.S. Bureau of Labor Statistics
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