FX.co ★ US Core CPI Holds Steady at 0.3% in September, Signaling Persistent Underlying Inflation

The United States Core Consumer Price Index (Core CPI) rose 0.3% month-over-month in September 2026, unchanged from the 0.3% increase recorded in August 2026. The data, updated on 14 October 2026, indicate that underlying inflation pressures remained steady heading into the final quarter of the year.

On a month-over-month basis, the “actual” September reading reflects the change from August to September, while the “previous” figure captures the change from July to August. With both periods showing a 0.3% increase, the data suggest no recent acceleration or deceleration in core price gains, which exclude volatile food and energy components.

The back-to-back 0.3% monthly advances underscore that underlying inflation has not eased further in the latest month, a point likely to be closely watched by markets and policymakers assessing the trajectory of prices and the broader economic outlook.