US producer prices are expected to rise 0.5% month-over-month in September 2026, marking the strongest increase in four months following a 0.4% gain in August. The reading would signal a further acceleration in producer-level inflation for a third consecutive month, amid elevated energy costs. Core PPI, which excludes food and energy, is forecast to increase 0.3% month-over-month, up from 0.2% in August. On an annual basis, however, headline producer inflation is expected to ease to 5.3% from 5.4%, while core PPI inflation is projected to slow to 4.4% from 4.6%.