Producer Price Index for plastic resins and materials, a WPU commodity index classifying resin by product type rather than by producing industry the way PCU325211325211 (Plastics Material and Resin Manufacturing) does. Index base: 1982 = 100.
Latest value
280.569
Index · as of Aug 2026
Year-over-year change
+8.2%
BLS
Month-over-month change
-1.0%
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 262.3 to 280.6, a change of +7.0%.
Highest reading in that period: 306.6 in May 2026. Lowest: 253.0 in Jan 2026.
Largest one-month rise: +10.7% in May 2026. Largest one-month fall: -4.5% in Jul 2026.
For a clause that resets its base every year, a 10% cap or floor would have limited the adjustment in 2 of the last 20 months.
Volatility (12mo)
±3.88%
Std. dev. of month-over-month change
Strongest average month-over-month move historically: May (+3.1% avg).
What this means for your clause
Appears in injection molding and packaging supply contracts alongside PCU325211325211 (Plastics Material and Resin Manufacturing). The two track closely but are not identical since one classifies by product and the other by producing industry, so a contract should specify which one governs rather than referencing "the resin PPI" generically.
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 — Plastic Resins and Materials (BLS series WPU066), 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 plastics or resin PPI escalation clause compares a current-period Producer Price Index value for a named resin series 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. BLS publishes separate series for thermoplastic resins, thermosetting resins, and finished plastic products, so naming the exact one matters more than usual here.
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