Eurozone inflation reaches 3.8% in September as energy prices climb

Energy costs drive headline inflation higher

Eurozone consumer prices increased by 3.8% in September 2026 compared with the same month in the prior year, according to preliminary data from Eurostat. The reading marked an acceleration from 3.2% in August and surpassed the 3.6% consensus expectation from a Reuters poll of economists. The primary driver of the increase was energy, which became 18.8% more expensive year on year, compared to a 14.3% annual increase recorded in August. High oil and gas prices followed the conflict in the Middle East and the blockade of the Strait of Hormuz, with average European diesel prices reaching peak levels last month. September represents the seventh consecutive month that inflation in the 21-member currency area has remained above the European Central Bank's 2.0% medium-term target.

Inflation is shooting upward, the outlook remains bleak. The Iran war and the heatwave are likely to remain a burden in the coming months. Moreover, crop failures resulting from the recent heat are likely to lead to higher prices. If things go well, the inflation rate will fall below three percent next spring. All of this is grist to the mill of the ECB to raise key interest rates further. The still quite low core rate is unlikely to change that, as the risk of second-round effects is high.

Divergence across member states and core measures

Price growth accelerated faster than economists anticipated across all four of the largest economies in the eurozone. Spain recorded an annual inflation rate of 5.0% in September. In the Netherlands, preliminary figures from the Central Bureau of Statistics showed consumer price inflation reaching 3.4%, up from 3.3% in August, alongside a 0.1% month-on-month rise. Core inflation, which excludes volatile energy and food prices to measure underlying price trends, ticked upward across the currency bloc to 2.5% in September from 2.4% in August. In February 2026, before the outbreak of the war in the Middle East, the annual inflation rate across the eurozone stood at 1.9%.

Central bank policy and bond market reactions

The European Central Bank raised its benchmark interest rate by a quarter point in June and implemented another quarter-point hike in September, bringing the rate to 2.50%. Financial markets anticipate a further 25-basis-point increase to 2.75% before the end of the year as policymakers work to prevent energy costs from embedding into broader wages and services. The central bank projects headline inflation to remain substantially above the 2.0% target through the first half of 2027. ECB Executive Board member Isabel Schnabel stated this week that policymakers cannot wait until second-round effects materialize, arguing that rate-setters must act pre-emptively to evaluate how energy shocks transmit into underlying prices.

Sovereign debt yields climb

Persistent price pressures and fiscal sustainability concerns in more indebted member states affected sovereign debt markets across the currency area. Yields on French 10-year government bonds rose by as much as 0.1 percentage points on Thursday to reach 4.96%, their highest level since 2002. Yields later settled slightly lower at 4.92%. The Dutch Central Bureau of Statistics announced that it will release finalized inflation figures for September on 13 October.