ECB set for September rate hike as Iran war keeps inflation elevated

European Central Bank policymakers are preparing to raise interest rates at their September meeting, according to people familiar with the discussions. The expected move would lift the policy rate to 2.5% from 2.25% as officials respond to inflation pressures linked to the Iran war. The central bank is also said to have little appetite to signal further tightening beyond that point.

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The reported increase would come after the ECB raised borrowing costs in June for the first time in nearly three years. That earlier move was intended to stop a war-driven rise in energy prices from spreading more broadly through the euro zone economy. The latest discussions come as inflation is running at nearly 3%, while policymakers wait for August price data and updated staff projections due at the September 9-10 meeting.

Sources said the case for another hike is being supported by rising natural gas prices and high petrol prices, both of which matter for an energy-importing currency bloc. They also said the euro zone economy has shown more resilience than expected, with output data and business surveys suggesting the earlier tightening has not yet caused undue strain. Long-term inflation expectations are still seen as anchored near the ECB's 2% target, which officials view as a reason not to hint at a more aggressive path.

The reported decision matters because it would show how central banks are reacting to the economic spillover from the Iran conflict. Energy costs remain a key transmission channel for inflation in Europe, and policymakers are trying to avoid a repeat of the prolonged price surge that followed Russia's invasion of Ukraine in 2022. A further increase would also reinforce the ECB's message that it is prepared to act again if war-related price pressures persist.

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The move would also shape market expectations for the rest of the year. Financial markets are already pricing in one or two further hikes, but the sources said ECB governors do not want to encourage that view in September. That suggests the central bank is trying to balance its anti-inflation stance with caution about overcommitting while the outlook remains uncertain.

What remains unclear is how the August inflation figures will compare with current expectations and whether they will strengthen or weaken the case for action. The final decision will come at the ECB's September 9-10 meeting, alongside updated economic projections. Investors will be watching for any change in language that could indicate whether this is likely to be the last move in the current cycle or the start of a longer tightening phase.

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