Producer Price Index for natural gas, a WPU commodity index in the fuels and power group.
Paste straight into Excel, Google Sheets or an email. Spreadsheet format lands as two columns.
| Month | Value | Change m/m |
|---|---|---|
| Sep 2026 | +5.1% | |
| Aug 2026 | −11.4% | |
| Jul 2026 | +8.2% | |
| Jun 2026 | +11.5% | |
| May 2026 | −12.6% | |
| Apr 2026 | −6.4% | |
| Mar 2026 | −61.6% | |
| Feb 2026 | +19.2% | |
| Jan 2026 | +36.0% | |
| Dec 2025 | +37.8% | |
| Nov 2025 | +29.9% | |
| Oct 2025 | −4.2% | |
| Sep 2025 | −7.4% |
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.
Fuels and related products and powerGas fuels
Sources: WPU0531 (Natural Gas); EIA via FRED, MHHNGSP.
Since 2016, this index has followed the Henry Hub gas price in the same month and moved about as far as it over a year.
Over the 12 months to Sep 2026, the Henry Hub gas price fell 0.7% and this index fell 1.7%.
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 — Natural Gas (BLS series WPU0531), 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.]
Used in supply contracts where gas is burned for process heat or used as a feedstock. The index is a national figure, so a single plant often pairs it with its own utility tariff or a hub price. It rises in winter and falls in summer, so the start month of an averaging window matters.
Divide the current value of BLS series WPU0531 (Natural Gas) by its value at contract signing, then apply that ratio to the natural gas 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 — Natural Gas, applies your formula, and gives both sides a number they can confirm, no spreadsheet required.