# September 2026 CPI rose 0.3% as price pressures stayed low

*Economics. 38% certain. Thursday, 15 October 2026*

> Speculative fiction assembled from prediction-market prices. This has not happened.

**Core CPI increased 0.2% month-over-month and annual inflation held at 3.6%.**

On Thursday, data for September 2026 showed the consumer price index rose modestly. The headline CPI-U increased by 0.3% month-over-month, meeting the minimum threshold. Core CPI, which excludes food and energy, climbed 0.2% month-over-month.

The overall monthly inflation rate for September registered a 0.6% gain. This figure represented the September inflation measure. The monthly inflation number was released on Thursday.

On an annual basis, consumer prices were up 3.6% in September 2026. The annual figure was also released on Thursday.

The timing of the releases showed a staggered reporting schedule.

The combination of a 0.3% headline rise, a 0.2% Core increase, a 0.6% monthly gain and a 3.6% annual rate kept overall price pressures low in September. Each of the reported measures indicated only modest upward movement. The data thus portrayed a subdued inflation environment for the month.

## Analysis

The modest month-over-month gains across headline and Core CPI suggest that inflation is not accelerating sharply, leaving the Federal Reserve with limited pressure to raise rates aggressively.

With price pressures remaining low, consumers may experience less erosion of purchasing power, which could support household spending, although real wage growth remains an open question.

Future inflation trajectories remain uncertain; supply-side disruptions, changes in energy prices, or shifts in monetary policy could alter the low-inflation environment observed in September.

### Background consulted for the analysis

- [Consumer Price Index Summary - 2026 M08 Results](https://www.bls.gov/news.release/cpi.nr0.htm)
- [Consumer Price Index News Release - 2026 M08 Results](https://www.bls.gov/news.release/cpi.htm)
- [US CPI Report September 2026: Date, Time & What to Expect | Finance Calendar](https://www.financecalendar.com/event/us-cpi-report-september-2026/)
- [September 2026 CPI MoM Combo · Headline & Core | Prediction Markets | Coinbase](https://www.coinbase.com/predictions/event/KXCPICOMBO-26SEP)

## What this was built from

- **Will September 2026 headline CPI-U rise at least 0.3% month-over-month?**: Yes, 95%; settles Wednesday, 14 October 2026 (manifold). [Market](https://manifold.markets/CalibratedGhosts/will-september-2026-headline-cpiu-r)
- **September Inflation US - Annual**: 3.6%, 39%; settles Thursday, 15 October 2026 (polymarket). [Market](https://polymarket.com/event/september-inflation-us-annual)
- **September Inflation US - Monthly**: 0.6%, 42%; settles Thursday, 15 October 2026 (polymarket). [Market](https://polymarket.com/event/september-inflation-us-monthly)
- **Core CPI YoY - September 2026**: 2.5%, 38%; settles Thursday, 15 October 2026 (polymarket). [Market](https://polymarket.com/event/core-cpi-yoy-september-2026)
- **Core CPI MoM - September 2026**: 0.2%, 51%; settles Thursday, 15 October 2026 (polymarket). [Market](https://polymarket.com/event/core-cpi-mom-september-2026)