Producer Price Index for the primary product of NAICS 212312, crushed and broken limestone mining, the quarried aggregate that feeds both construction fill and cement kiln feedstock. Index base: December 1983 = 100.
Latest value
539.465
Index · as of Aug 2026
Year-over-year change
+6.1%
BLS
Month-over-month change
+0.2%
Latest value is 1 month old. Next update expected around Sep 2026.
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Price history
Data & insights
Key figures
From Jan 2024 to Aug 2026 the index went from 466.3 to 539.5, a change of +15.7%.
Highest reading in that period: 539.5 in Aug 2026. Lowest: 466.3 in Jan 2024.
Largest one-month rise: +4.1% in Jan 2026. Largest one-month fall: -0.2% in Apr 2026.
The year-over-year change stayed within 10% either way in each of the last 20 months, so a 10% annual cap or floor would not have been reached.
Volatility (12mo)
±1.13%
Std. dev. of month-over-month change
Strongest average month-over-month move historically: January (+3.9% avg).
What this means for your clause
Aggregate supply agreements for road base and site fill cite this series directly, and a cement supply contract may also reference it as an upstream input cost signal, since limestone is the primary raw material cement plants calcine, separate from the finished cement price itself.
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 PPI — Crushed and Broken Limestone Mining (BLS series PCU2123122123120), 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.]
A concrete and cement PPI escalation clause compares a current-period Producer Price Index value for cement and concrete products to the value at contract signing (the base period), turns that into a ratio, then applies the ratio to the contract price or affected line items. Construction is the classic use case for this clause, and it typically names the exact BLS series code, an averaging window, a publication lag, and a cap.
Escalake tracks US PPI — Crushed and Broken Limestone Mining, applies your formula, and gives both sides a number they can confirm, no spreadsheet required.
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