Poland inflation rises to 4.0% in September as fuel costs climb across Europe

Polish inflation exits central bank tolerance band

Poland's consumer price index rose 4.0% year on year in September 2026, according to flash estimates released by Statistics Poland (GUS). The reading represents an increase from 3.4% in August and marks three consecutive months of accelerating price growth after hitting 2.5% in June and 3.0% in July. On a month-on-month basis, prices advanced 0.7% from August, one of only three September monthly increases of that magnitude in Poland during the 21st century. The outcome pushed annual inflation above the upper limit of the National Bank of Poland's target band (2.5% plus or minus 1 percentage point) for the first time since June 2025, when the index stood at 4.1%. It also placed the headline rate above the central bank's reference interest rate of 3.75% for the first time since December 2023.

Fuel price increases drive domestic cost pressures

Higher motor fuel expenses served as the primary contributor to the inflationary acceleration. Fuel prices for personal transport equipment gained 9.2% month on month and exceeded September 2025 levels by 36.1%. Over the last three months, transport fuel costs increased by more than 31%, delivering the steepest year-on-year surge since July 2022. Economists at ING Bank Śląski calculated that rising fuel expenses accounted for roughly half of Poland's overall annual price growth in September. Global supply constraints linked to conflict in the Middle East and strikes on Russian refining facilities contributed directly to European fuel price pressures.

Mateusz Dadej, chief economist at Coface for Poland and the CEE region, described the supply factors:

The countries of the Arabian Peninsula were not only oil exporters, but also significant suppliers of finished fuels. Restricting transport from their territory significantly depletes the global supply of refinery products. The global situation is also worsened by Ukrainian attacks on Russian refineries.

Food price trends and domestic reactions

Food and non-alcoholic beverages provided a partial counterweight to energy costs, rising 0.1% month on month while declining 0.5% year on year. However, that represented a narrower decline than the 0.9% annual deflation recorded in August, marking the first upward move in the annual food metric since May 2025. Agricultural factors including a severe winter, drought, and localized flooding throughout 2026 reduced baseline disinflationary pressure from farming commodities. Economic analyst Janusz Szewczak criticized fiscal policy conditions following the GUS release and warned of further price pressure:

A few days ago I already gave the first information that this inflation would be at 4 percent in September and that it would head towards 5 percent in the coming days, unless some rapid action is taken to lower rates. This was confirmed today. GUS provided this information. This is an extraordinarily dynamic rise in inflation, because let us remember, previous information pointed to 3.4 percent.

European economies face broad energy-driven inflation

The acceleration in price growth extended beyond Poland, with preliminary September inflation data across Europe's largest economies coming in above forecasts. Spain's annual inflation reached 5.0%, its highest level since 2023, while Italy registered 4.1%, France reached 3.4%, and Germany accelerated from 2.9% in August to 3.3%. In the euro area, where analysts surveyed by Bloomberg forecast a 3.7% headline figure ahead of Friday's release, headline inflation is projected to approach 4% toward the end of the year. Investors reduced expectations for an October interest rate increase by the European Central Bank, viewing the price pressure as concentrated in energy rather than core inflation. On financial markets, Germany's two-year bond yield fell eight basis points to 3.22%, while the ten-year yield declined six basis points to 3.57%.