September 2025 CPI Update

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Core CPI rose 0.23% in September, below consensus expectations. The year-over-year core inflation rate, which excludes volatile food and energy prices, ticked down to 3.02%.

Let’s take a closer look at Goldman Sachs Research’s breakdown of the latest data.

What’s up, what’s down?

Airfares increased 2.7% this month, boosting the core rate by 3 basis points, and hotel prices rose 1.7%, boosting the core by another 2 basis points.

Core goods inflation was firm at 0.22%, largely reflecting increases in apparel, recreation goods, household furnishings, personal care, and new car prices:

  • Apparel prices rose 0.7%.
  • Recreation goods prices rose 0.4%.
  • Personal care products rose 0.4%.
  • Car parts prices rose 0.3%.
  • New car prices rose 0.2%.
  • Household furnishings prices rose 0.2%,

Computer software prices declined sharply again (-3.7% after -4.9% last month). Car insurance, rental, and leasing prices all declined, together weighing on the core by about 2 basis points.

The shelter component decelerated to 0.21% (vs. 0.44% last month and 0.28% on average in the last three months), reflecting a deceleration in rent inflation (0.20% vs. 0.30% last month and 0.26% in the prior three months) and a sharper decline in owners’ equivalent rent inflation (0.13% vs. 0.38% last month and 0.32% in the prior three months).

Headline CPI rose 0.31% (3.01% year over year), reflecting a 1.51% increase in energy prices and a 0.25% increase in food prices.

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