Producer Price Index for hardboard, particleboard, and fiberboard products.
Paste straight into Excel, Google Sheets or an email. Spreadsheet format lands as two columns.
| Month | Value | Change m/m |
|---|---|---|
| Sep 2026 | +3.3% | |
| Aug 2026 | −2.4% | |
| Jul 2026 | +1.5% | |
| Jun 2026 | −3.5% | |
| May 2026 | −3.3% | |
| Apr 2026 | +1.3% | |
| Mar 2026 | +3.9% | |
| Feb 2026 | +9.0% | |
| Jan 2026 | +1.3% | |
| Dec 2025 | −2.6% | |
| Nov 2025 | −0.2% | |
| Oct 2025 | −0.0% | |
| Sep 2025 | −1.3% |
Same numbers as the chart, straight from BLS. Dates are the first of each period, the way BLS reports them.
No single input series stands out for this index.
Pulp, paper, and allied productsBuilding paper & building board mill prods.
Sources: WPU0922 (Hardboard, Particleboard, and Fiberboard Products); BLS WPU0811.
Since 2017, this index has followed the softwood lumber price index about one month later and moved about as far as it over a year.
Over the 12 months to Sep 2026, the softwood lumber price index rose 14.2% and this index rose 7.8%.
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 — Hardboard, Particleboard, and Fiberboard Products (BLS series WPU0922), published by BLS. Base Period: the index value published for September 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.]
The standard series for engineered wood panel products, used in cabinetry, subflooring, and similar applications distinct from solid dimensional lumber.
Divide the current value of BLS series WPU083 (Plywood) by its value at contract signing, then apply that ratio to the plywood part of the price. A usable clause also names an averaging window, a rule for revised values and missing months, and a cap.
Escalake tracks US PPI — Hardboard, Particleboard, and Fiberboard Products, applies your formula, and gives both sides a number they can confirm, no spreadsheet required.