FX.co ★ Poland’s Inflation Accelerates in September, CPI Climbs to 4.1% Year-on-Year

Poland’s consumer price inflation accelerated in September, with the Consumer Price Index (CPI) rising 4.1% year-on-year, up from 3.4% previously. Both the current and prior readings relate to September 2026, indicating a pickup in price pressures compared with the same month a year earlier.

The data, updated on 14 October 2026, show that inflation is gaining momentum on a year-over-year basis, as the “actual” figure measures the change in prices this September versus September a year ago, while the “previous” figure captured the equivalent comparison for the prior month. The move from 3.4% to 4.1% suggests that cost pressures in the Polish economy are re-intensifying after a period of milder inflation.

For policymakers and markets, the uptick may reignite debate over the appropriate path for monetary policy. A sustained rise in CPI could complicate efforts to balance inflation control with support for economic growth, keeping attention firmly on upcoming data releases and central bank signals in the months ahead.