Primary source
- U.S. Bureau of Labor Statistics (public API v1) (bls.gov · retrieved: )
- U.S. Bureau of Labor Statistics (public API v1) (data) (api.bls.gov · retrieved: )
Data transcribed from these sources on: .
US inflation rate (12-month change)
As of : The 12-month change in the U.S. all-items CPI-U was 3.7% in September 2026, computed from BLS index values of 336.940 and 324.800 a year earlier. In the previous month it was 3.4%. The index is not seasonally adjusted.
Published: · Data updated:
Extended data
| Measure | Value |
|---|---|
| Reference month | September 2026 |
| Index | 336.940 |
| Index September 2025 | 324.800 |
| 12-month change | 3.7% |
| Previous month's 12-month change | 3.4% |
Formula: (index ÷ index 12 months earlier − 1) × 100, rounded to one decimal. The CPI-U index is not seasonally adjusted (NSA); the BLS headline monthly change is seasonally adjusted and can differ.
12-month change, last 12 months
| Month | Index | Index a year earlier | 12-month change |
|---|---|---|---|
| September 2026 | 336.940 | 324.800 | 3.7% |
| August 2026 | 334.980 | 323.976 | 3.4% |
| July 2026 | 333.918 | 323.048 | 3.4% |
| June 2026 | 333.952 | 322.561 | 3.5% |
| May 2026 | 335.123 | 321.465 | 4.2% |
| April 2026 | 333.020 | 320.795 | 3.8% |
| March 2026 | 330.213 | 319.799 | 3.3% |
| February 2026 | 326.785 | 319.082 | 2.4% |
| January 2026 | 325.252 | 317.671 | 2.4% |
| December 2025 | 324.054 | 315.605 | 2.7% |
| November 2025 | 324.122 | 315.493 | 2.7% |
| September 2025 | 324.800 | 315.301 | 3.0% |
Frequently asked questions
How is the 12-month change calculated?
The index for the month divided by the index of the same month a year earlier, minus one, times 100.
Is this the 'headline' rate?
It is computed from the same unadjusted all-items index the BLS uses for the 12-month headline figure.
Figures are copied or calculated from the official dataset named above, as retrieved on the date shown. This page is information, not financial, legal or investment advice.