Euro zone inflation climbs to 3.2% as Iran war keeps energy costs elevated

Euro zone inflation accelerated to an estimated 3.2% in May, the highest reading since the Iran conflict erupted, as double-digit energy price growth overwhelmed the disinflation trend that had taken hold before the war. The flash estimate from Eurostat, released on Tuesday, came in line with the consensus of economists polled by Reuters and effectively guarantees that the European Central Bank will raise its key interest rate by 25 basis points at its meeting next week.

Energy shock drives inflation above target

Energy costs were again the dominant force, rising 10.9% on the year compared with 10.8% in April. That marks the third consecutive month of double-digit energy inflation since the U.S.-Iran war disrupted oil and gas flows through the Strait of Hormuz. Europe remains a net energy importer, and the pass-through from wholesale markets to household and industrial bills has been faster than in previous shocks because many governments have wound down the price caps and subsidies introduced during the 2022-23 crisis. The ECB's own models suggest that each 10% sustained increase in oil prices adds roughly 0.3 percentage points to headline inflation over a year, a rule of thumb that now looks conservative given the simultaneous tightening in gas markets.

Services inflation, which the Governing Council watches closely for signs of second-round effects, jumped to 3.5% from 3.0% in April. The increase reflects higher transport and tourism costs as airlines and hotels pass on fuel surcharges, as well as wage pressures in a labour market where unemployment remains at a historic low of 6.4%. Food, alcohol and tobacco provided the only relief, slowing to 2.0% from 2.4%, though analysts warn that agricultural input costs are rising again as fertiliser and diesel prices climb.

Divergence across the single currency area

The aggregate figure masks wide national differences. Germany, the bloc's largest economy, saw annual inflation dip to 2.7% from 2.9%, helped by a statistical base effect from last year's energy price spike and a moderation in rents. France moved in the opposite direction, climbing to 2.8% from 2.5% as regulated electricity tariffs were adjusted upward in February. Greece and Lithuania both recorded rates above 5%, driven by their heavier reliance on imported energy and less diversified electricity mixes. The spread between the highest and lowest national rates now exceeds three percentage points, a level that complicates the ECB's task of setting a single policy stance for 20 economies.

This dispersion is not new, but it has widened since the war began. In February, before the conflict, the gap between the fastest and slowest inflation rates in the euro area was roughly 2.2 percentage points. The ECB's monetary policy framework does not target national inflation rates, yet the political backlash in high-inflation countries, where real wages are falling, can constrain the central bank's room for manoeuvre. Governments in Athens and Vilnius have already called for targeted fiscal support, which, if granted, would add to demand pressures at the very moment the ECB is trying to cool them.

Services inflation accelerates while food eases

The services component is now the second-largest contributor to the headline figure after energy. At 3.5%, it sits well above the 2% level that would be consistent with the ECB's medium-term goal once energy volatility fades. The rise was broad-based: transport services added 0.4 percentage points, accommodation and catering 0.3, and recreational services 0.2. Underlying this is a wage dynamic that remains tight. Negotiated wage growth in the first quarter ran at 4.7% year on year, the strongest since the series began in 1993, and the second quarter is tracking similarly. Companies have so far absorbed much of the increase through margins, but the May services print suggests that pricing power is returning in sectors where demand remains resilient.

Food inflation's deceleration to 2.0% is welcome but fragile. The FAO food price index has turned up again in April and May as grain exports from the Black Sea face renewed uncertainty and fertiliser costs follow gas higher. Eurostat's breakdown shows that unprocessed food, fruit, vegetables, meat, is already accelerating again, while processed food continues to slow on lagged contracts. The net effect for the next few months is likely to be a gradual climb back toward 3%.

Markets price in ECB insurance hike

Financial markets reacted calmly. The euro held steady around $1.164 against the dollar, and the yield on Germany's 10-year bund, the benchmark for euro area borrowing costs, fell six basis points. The modest move reflects the fact that the data contained no surprise: LSEG data showed a 94% implied probability of a 25 basis point increase at the June meeting, up from roughly 80% a week ago. Money markets now price the deposit facility rate reaching 4.0% by September, implying two more hikes after June, before a pause.

Carsten Brzeski, global head of macro at ING, described the coming increase as an "insurance" hike, a pre-emptive move to anchor expectations rather than a response to runaway demand. "A week ahead of the next ECB meeting, this is the expected uptick in inflation that will motivate the central bank to decide on an 'insurance' hike," he wrote in a note on Tuesday. "Nevertheless, for inflation in the eurozone, the only way is currently up. Not a sharp up but a rather moderate and gradual lift." His assessment captures the Governing Council's dilemma: inflation is above target largely because of a supply shock that monetary policy cannot fix, yet doing nothing risks de-anchoring expectations and forcing a larger tightening later.

The Iran war factor and its persistence

The conflict in Iran has now entered its fourth month. Initial market scenarios assumed a brief disruption lasting six to eight weeks, but the destruction of export infrastructure at Kharg Island and the mining of shipping lanes have extended the outlook. Brent crude has traded in a $85-95 range since April, well below the $120-130 peaks feared in worst-case analyses, but persistently above the $70-75 level that prevailed before the war. The International Energy Agency's latest oil market report estimates that 1.2 million barrels per day of Iranian supply remain offline, with no clear timeline for restoration.

Gas markets are tighter still. European benchmark TTF prices have averaged €38 per megawatt-hour in May, up from €32 in March, as LNG cargoes are diverted to Asia and Russian pipeline flows via Ukraine remain at minimal levels. Storage sites across the EU entered the injection season at 62% full, below the five-year average of 68%, raising the spectre of a difficult winter if the war drags on. The ECB's June macroeconomic projections, due to be published alongside the rate decision, will almost certainly revise up the inflation path for 2026 and 2027 while shaving a few tenths off growth.

What the data means for the June meeting

The Governing Council meets on 11-12 June in Frankfurt. With inflation at 3.2%, services at 3.5%, and energy showing no sign of a sustained retreat, the case for a hike is overwhelming. The more interesting question is the language that accompanies it. In April, President Christine Lagarde said future decisions would be "data-dependent" and "meeting by meeting". That phrasing will be tested. If the statement signals that the June hike is the last for a while, markets may rally; if it leaves the door open for July, the terminal rate could shift higher. The new staff projections will provide the anchor.

There is also the question of the transmission protection instrument and the pace of balance sheet reduction. The ECB has been shrinking its portfolio by €15 billion per month on average through partial reinvestment of maturing bonds under the pandemic emergency purchase programme. Some governors argue that quantitative tightening should accelerate to reinforce the rate signal, while others warn that banking sector stress, evident in the widening spread between Italian and German sovereign yields, counsels caution. The May inflation print does not resolve that debate, but it ensures the hike will happen.