Consumer Price Index for All Urban Consumers, all items, US city average, not seasonally adjusted. The headline US consumer inflation measure. Index base: 1982-84 = 100.
Latest value
334.98
Index · as of Aug 2026
Year-over-year change
+3.3%
BLS
Month-over-month change
+0.3%
Latest value is 2 months old. Next update expected around Sep 2026.
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as of Aug 2026
Enter a base value, a current value, and a contract amount to see the adjustment.
Price history
Data & insights
Key figures
From Jan 2024 to Aug 2026 the index went from 308.4 to 335.0, a change of +8.6%.
Highest reading in that period: 335.1 in May 2026. Lowest: 308.4 in Jan 2024.
Largest one-month rise: +1.0% in Mar 2026. Largest one-month fall: -0.3% in Jun 2026.
The year-over-year change stayed within 10% either way in each of the last 19 months, so a 10% annual cap or floor would not have been reached.
Volatility (12mo)
±0.40%
Std. dev. of month-over-month change
Strongest average month-over-month move historically: March (+0.6% avg).
What this means for your clause
The most cited inflation index in escalation clauses of every kind, from service and license fees to the materials term of the airframe formula in aircraft purchase agreements, where it carries 35% of the adjustment. It tracks consumer prices, so it drifts from a supplier's real costs when one input dominates.
Draft a clause
A starting point citing this series by name and code. Replace the bracketed terms with your contract's actual scope before use.
The [affected portion] of the Contract Price shall be adjusted using US CPI-U — All Items, US City Average (BLS series CUUR0000SA0), published by BLS.
Base Period: the index value published for August 2026 (or the month of contract signing, if different) is the Base Value.
Adjustment: at each Adjustment Date, the Current Value is the most recently published three-month average of the index (the Averaging Window). The Escalation Factor equals Current Value divided by Base Value.
Cap: the Escalation Factor applied under this clause shall not exceed 1.10 or fall below 0.90 (a 10% cap and floor) in any single Adjustment Date, regardless of the index's actual movement.
[Replace bracketed terms with your contract's actual affected-portion definition and adjustment-date schedule before use. This is a drafting starting point, not legal advice.]
New aircraft are escalated with a labor and inflation formula, not a manufacturing PPI: 65% Employment Cost Index (manufacturing, CIU2013000000000I) plus 35% CPI-U (CUUR0000SA0), measured against base-year values and applied at delivery. Spare parts have no matching series, so price them from a weighted input composite instead.
PPI measures what producers receive for an input, close to the actual production cost of a purchased material or component. CPI measures what consumers pay at retail, which layers on distribution and retail markup that has nothing to do with the underlying production cost of the input. Most B2B materials and component contracts should index PPI. CPI fits labor-adjacent cost-of-living escalators and consumer-facing service contracts.