ECB raises deposit rate to 2.25% as Iran war drives inflation to 3.2%

The European Central Bank raised its benchmark deposit rate by 0.25 percentage points to 2.25% on Thursday, the first increase since September 2023 and a decisive break from the seven-meeting pause that had held rates at 2.0% since last autumn. The move comes as eurozone inflation surged to 3.2% in May, well above the bank's 2% target, propelled by an energy price shock triggered by the US-Israeli war against Iran and the near-total closure of the Strait of Hormuz.

Policymakers in Frankfurt framed the decision as a necessary response to inflation pressures that have broadened beyond energy into food and services, while acknowledging the increase risks deepening an economic slowdown that has already left the eurozone barely growing. The bank's new staff projections, released alongside the decision, show inflation averaging 3.0% for 2026, up from 2.6% forecast in March, while growth expectations were trimmed to 0.8% from 0.9%.

Energy shock rewrites the inflation outlook

The Strait of Hormuz, through which roughly one-fifth of global oil and liquefied natural gas shipments pass, has been almost completely closed since the conflict escalated in early 2026. European benchmark gas prices at the Title Transfer Facility (TTF) hub have more than doubled since January, and Brent crude has traded above $110 a barrel for much of the spring. The ECB's statement was explicit: "The war in the Middle East is generating inflation pressures."

Unlike the 2022 energy crisis, when the ECB initially hesitated before embarking on its most aggressive tightening cycle in history, this time the bank moved pre-emptively. The deposit rate had been held at 2.0% since October 2023, even as core inflation, excluding energy and food, remained sticky above 2.5% for much of 2024 and 2025. The May flash estimate of 3.2% headline inflation, released by Eurostat on 31 May, forced the issue.

Growth forecasts cut as transmission bites

The bank's revised growth projection of 0.8% for 2026 reflects both the direct hit from higher energy costs and the lagged impact of the 4.5 percentage points of tightening delivered between July 2022 and September 2023. Bank lending surveys show credit standards for loans to firms have tightened for ten consecutive quarters, and demand for corporate loans turned negative in the first quarter of 2026 for the first time since 2013.

Germany, the eurozone's largest economy, is particularly exposed. Its manufacturing-heavy model relies on affordable energy and export demand, both now under pressure. The Bundesbank's latest monthly report warned that German GDP could contract in the second quarter, marking a technical recession after a 0.2% decline in the first three months of the year. France and Italy are projected to grow modestly, but Spain's tourism-dependent recovery may cushion the southern flank.

Lagarde keeps options open with meeting-by-meeting pledge

At her post-decision press conference, Christine Lagarde, president of the European Central Bank, said the institution was "well positioned to navigate the uncertainty caused by the war [in Iran]." She added that the bank would "closely monitor the situation and follow a data-dependent and meeting-by-meeting approach." The language mirrors the formulation used during the 2022-23 hiking cycle, deliberately avoiding any signal about the pace or endpoint of further moves.

Markets interpreted the wording as leaving the door open for another quarter-point move in July, though money markets price only a 40% probability. The ECB's forward guidance has shifted from the "sufficiently restrictive" terminology of early 2024 to an explicit acknowledgement that "the outlook remains uncertain, with upside risks for inflation and downside risks for economic growth."

The policy dilemma: supply shock versus demand management

Central banks face a classic dilemma when inflation is driven by a supply shock: raising rates cannot bring more oil or gas to market, but it can anchor inflation expectations and prevent second-round effects in wages and prices. The ECB's own research suggests that about 60% of the current inflation overshoot is directly attributable to energy, with the remainder reflecting indirect effects and domestic price pressures.

Wage growth in the eurozone ran at 4.7% year-on-year in the first quarter of 2026, according to negotiated wage data, well above the rate consistent with the 2% inflation target over the medium term. The bank argues that tighter policy is needed to prevent the energy shock from becoming embedded in wage-setting behaviour. Critics, including some national central bank governors, contend that the transmission of past hikes has not yet fully worked through the economy and that an additional increase risks overtightening.

Fiscal policy constraints limit the cushion

Unlike in 2022, when governments deployed massive energy subsidies and price caps, fiscal space is now tighter. The European Commission's revised Stability and Growth Pact, which took effect in 2025, requires debt-reducing adjustment paths for high-debt members including France, Italy and Belgium. Germany's constitutional debt brake limits deficit spending to 0.35% of GDP. Targeted support for vulnerable households and energy-intensive industries remains possible, but broad-based shields are politically and legally harder to justify.

This matters because the ECB has consistently argued that monetary policy alone cannot manage a supply-driven inflation spike without excessive damage to growth. The bank's March 2026 economic bulletin estimated that a 10% sustained increase in gas prices reduces eurozone GDP by 0.3 percentage points after one year, with the effect concentrated in Germany and central Europe. Without fiscal offset, the burden of adjustment falls entirely on interest-rate-sensitive sectors: housing, investment and durable goods consumption.

What the data will show before July

The next six weeks will deliver a clutch of indicators that could sway the July decision. The June flash inflation estimate, due on 30 June, will reveal whether May's 3.2% reading was a peak or a plateau. The ECB's consumer expectations survey for May, the June PMI composites, and the second-quarter wage tracker from Indeed and the bank's own negotiated wage data will all feed into the assessment. Perhaps most important, the trajectory of gas and oil prices, and by extension the status of the Strait of Hormuz, remains a geopolitical variable no model can forecast.