U.S. ISM Manufacturing PMI September 2026: October 1 Release Guide

U.S. ISM Manufacturing PMI September 2026: the direct answer

The Institute for Supply Management (ISM) is scheduled to publish its U.S. Manufacturing PMI report for September 2026 on Thursday, October 1, at 10:00 a.m. ET. That is 14:00 UTC and 7:30 p.m. India Standard Time. As this draft was checked on September 27, the September survey result had not been released. The correct actual-reading placeholder is therefore: September 2026 Manufacturing PMI — awaiting ISM release. It must not be replaced with a forecast, an estimate or August’s number.

This is explanatory reporting on a scheduled economic-data release, not financial advice or a buy/sell recommendation. The release calendar is the primary confirmation of timing; ISM’s August report separately says the next report, featuring September data, is due on October 1 at 10:00 a.m. ET. Release schedules can be revised, so readers checking near publication should use ISM’s live calendar and the posted report rather than a static countdown.

What will be released—and what has not happened yet

The October 1 publication is the monthly ISM Manufacturing PMI Report based on information respondents provide about September conditions at U.S. operations. It is not an October activity reading simply because it comes out in October. ISM says it sends the survey to its Manufacturing Business Survey Panel early in the month, receives responses during most of the month and compiles the report for release on the first business day of the following month.

At the time of writing, no official September headline PMI, New Orders, Production, Employment, Supplier Deliveries, Inventories or Prices figure is available. Nor is a survey forecast an observed fact. A later update can report the official headline and component values only after ISM posts them, should preserve the reference month in the headline, and should identify any revision or correction that ISM itself makes.

How to read the headline PMI without overreading it

The Manufacturing PMI is a diffusion index, not a percentage change in factory output, sales or employment. ISM asks purchasing and supply executives whether conditions improved, were unchanged or worsened compared with the prior month. For the indicators it tracks, the diffusion calculation uses the share of positive responses plus half the share reporting no change. It is a directional, breadth-based measure: it summarises how widespread month-to-month improvement or deterioration is across panel responses.

A headline above 50 generally means the manufacturing economy is expanding; below 50 generally means it is contracting. The distance from 50 indicates the extent of that breadth and direction, but it does not translate one-for-one into industrial-production growth, GDP growth or a company’s revenues. ISM also says that a Manufacturing PMI above 47.5 over time generally corresponds with expansion in the overall economy. That longer-run relationship is context, not a promise about the next GDP release.

The headline is seasonally adjusted, as are New Orders, Production, Employment and Inventories. Seasonal adjustment aims to remove recurring within-year effects such as weather, holidays and institutional patterns. Readers should not confuse an adjusted diffusion index with a survey response rate, an annual growth rate or a price-inflation rate.

The five headline components: the practical guide

ISM builds the Manufacturing PMI with equal weights from five subindexes: New Orders, Production, Employment, Supplier Deliveries and Inventories. New Orders is the demand-facing signal: it records whether manufacturers report new orders rising or falling from the previous month. Production records the direction of output, while Employment tracks whether survey respondents report changes in factory employment. Inventories reflects respondents’ own materials or goods inventories, not necessarily retail stock on shelves.

Supplier Deliveries needs special care. It is the inverted component: a reading above 50 indicates slower deliveries, while a reading below 50 indicates faster deliveries. Slower deliveries can occur when demand and supply-chain constraints are both relevant, so it should not automatically be described as positive factory momentum. ISM labels ‘slower’ as the positive direction for calculating this index; a reader should still consider it alongside New Orders, Production and comments from survey participants.

Equal weighting does not mean the five measures tell the same story. A rise in Production alongside weaker New Orders can show current output holding up while incoming demand softens. An Employment move can differ from output because hiring decisions lag or reflect productivity and staffing choices. Inventories can be read alongside demand and supply conditions rather than as a stand-alone verdict. The September release’s value lies in the combination, not a single dramatic interpretation of one component.

Other lines that matter to commodity and supply-chain readers

The report contains more than the five inputs to the headline PMI. ISM also publishes Prices, Backlog of Orders, New Export Orders, Imports and Customers’ Inventories, as well as industry comments and lists of commodities reported up or down in price and in short supply. Prices measures whether more respondents report input prices increasing or decreasing; it is not a consumer-price index and should not be called a measure of household inflation. Customers’ Inventories gauges how respondents view customers’ stocks of their products and is not part of the headline calculation.

For metals and industrial-materials audiences, the commodity lists can provide useful qualitative supply-chain context, but they do not establish a benchmark price, a global shortage or a trade recommendation. In the completed August report, ISM listed aluminum, copper, steel and several related inputs among commodities reported up in price, and listed copper and steel among items in short supply. Those are reported survey signals for August only, not a September finding and not evidence that every buyer faces the same conditions.

Latest completed benchmark: August was 54.6, not September

The latest completed ISM Manufacturing PMI report available before the September release covered August. ISM reported a headline of 54.6, down from 55.6 in July, with manufacturing expanding for an eighth consecutive month. Its New Orders Index was 53.7, Production 58.3, Employment 51.2, Supplier Deliveries 59.3 and Inventories 50.6. Prices stood at 71.1. These numbers are published historical data and are included only to establish the current benchmark.

Independent coverage supports the same basic distinction. TD Economics described August output as the strongest part of the release even as demand and employment measures cooled. Trading Economics records the completed August headline and the next calendar date, while its consensus figure remains an expectation rather than an observed September result. Those sources interpret or catalogue the completed August survey; neither supplies an actual September reading. A useful October 1 comparison should state the official September value first, then compare it with the August figure that ISM displays.

A disciplined checklist for October 1

First, confirm that the ISM report is live and record the September headline exactly as published. Second, state the 50 expansion/contraction threshold and identify the month being measured. Third, compare New Orders, Production, Employment, Supplier Deliveries and Inventories with their August values, noting that the supplier-deliveries interpretation is inverted. Fourth, separate the Prices Index from consumer inflation and quote the specific component before drawing any supply-cost observation.

Finally, check the survey commentary, industry breadth and commodity lists for evidence that supports—or limits—a headline narrative. An index can improve while particular industries weaken, and prices or deliveries can move for reasons different from orders. This release will arrive a day after the scheduled U.S. PCE inflation and GDP package and before the scheduled U.S. employment situation report, so the reference periods, methods and timing should not be blended into one conclusion. The information is useful when it is dated, sourced and kept in its proper statistical lane.

Editorial status and update rule

Status at verification: scheduled, not completed. ISM’s official calendar and August release notice support an October 1, 2026, 10:00 a.m. ET publication for September manufacturing data. The article deliberately contains no September PMI number, consensus estimate, market forecast or policy call. If ISM changes its schedule or posts a release, the title, actual-reading placeholder, key points and trend record should be updated together with the report URL and an explicit update time.