The European Central Bank raised its key interest rates by 25 basis points on 11 June 2026, marking the first increase since September 2023 and signalling a shift in monetary policy as the ongoing war in Iran pushes energy costs and consumer prices well above the ECB's 2% target. The main deposit rate now stands at 2.25%, while the main refinancing rate — used by commercial banks to borrow from the ECB — was lifted to 2.4%.

The immediate trigger is a sustained surge in energy prices linked to the conflict in Iran, which has effectively closed the Strait of Hormuz — the narrow waterway connecting the Persian Gulf to the Arabian Sea and a critical passage for global oil shipments — for more than 100 days. With less crude reaching world markets, oil prices have climbed above $90 a barrel, up from around $70 before hostilities began. Eurozone consumer price inflation rose to 3.2% in May 2026, up from 3.0% in April, with energy price inflation running at 10.9%. The ECB now projects average inflation of 3.0% across 2026, only returning to its 2% target in the second half of 2027. ECB president Christine Lagarde acknowledged that officials had earlier considered "looking through" the energy-driven price rise, as they might with a temporary shock, but concluded that higher oil and gas prices were already feeding into goods, services, and food costs in ways that could not be ignored.

The decision also reflects institutional memory of the ECB's widely criticised slow response to inflation that followed Russia's invasion of Ukraine in 2022, when rate rises came late. This time, the governing council — composed of heads of national central banks and the ECB's executive board — opted to act earlier, though it stressed it was "not pre-committing to a particular rate path" and would assess conditions meeting by meeting. Revised ECB staff projections cut the eurozone growth forecast to 0.8% for 2026 and 1.2% for 2027, reflecting weaker consumer confidence, erosion of real incomes, and subdued private investment. The labour market has remained relatively resilient, with unemployment at 6.3% in April, but hiring is slowing and both firms and households expect conditions to soften.

Economists are divided on how far this tightening cycle can go. Deutsche Bank's chief European economist Mark Wall described the move as "a significant moment" — the first rate hike by a major global central bank in direct response to the current energy shock — but cautioned that a weakening economy limits the scope for further rises, predicting one additional increase in September before a pause. ING economist Bert Colijn echoed the caution, noting that the eurozone economy today is considerably weaker than it was during the post-pandemic inflation surge of 2022, which constrains the ECB's room to manoeuvre. Business associations and trade unions in Germany have both expressed concern about the impact of higher borrowing costs on an already fragile economy.

The ECB's move comes as other major central banks weigh their own responses to the global energy shock. The US Federal Reserve and the Bank of England are both expected to hold rates steady at their upcoming meetings, despite inflation running at 4.2% in the United States and 2.8% in the United Kingdom — with further rises anticipated in both countries over the summer. For households in the eurozone, the rate increase could bring modestly higher returns on savings, though banks set their own deposit rates independently and are not obliged to pass on the increase. Mortgage and business loan costs, however, are likely to rise as the new rate filters through the financial system.