Portuguese Inflation Accelerates to 2.7% in March — Fuel Prices Explain Almost the Entire Jump and Push the Headline to an Eight-Month High

Portugal's inflation rate accelerated sharply in March 2026, landing at 2.7 per cent on the year — the highest reading since August 2025 and 0.6 percentage points above the 2.1 per cent printed for February. The Instituto Nacional de Estatística released the definitive series on 13 April, and it makes the March number a pivotal data point for both households and the Montenegro government's budget assumptions.

The acceleration is almost entirely a fuel story. INE singled out the energy-products sub-index, which swung from a fall of 2.2 per cent in February to a rise of 5.8 per cent in March. The statistical office's commentary is unusually direct: the headline jump is explained "quase na totalidade" — almost in full — by the reversal in energy prices.

What's under the headline

Strip out the volatile components and the picture is calmer. Core inflation, which excludes unprocessed food and energy, edged up only 0.1 percentage point to 2.0 per cent, exactly the European Central Bank's target rate. That suggests the services-side price pressures that have dogged Portugal since 2023 are not re-accelerating — at least not yet.

Unprocessed food, the other usual suspect, actually cooled slightly: prices rose 6.4 per cent in March against 6.7 per cent in February. It is a high number in isolation, and explains why the DECO cabaz alimentar keeps hitting record weekly highs at the checkout, but the change in the rate is downward.

The Harmonised Index of Consumer Prices, which is the comparable euro-area measure, tracked the national CPI at 2.7 per cent, up from 2.1 per cent in February. That puts Portugal 0.1 percentage points above the March euro-area aggregate of 2.6 per cent, after five straight months of running at or below the bloc-wide rate.

The fuel channel

The energy swing is traceable to two things. First, global Brent moved from roughly $72 in mid-February to above $82 in mid-March as the Hormuz crisis tightened tanker freight. Second, the government's imposto sobre produtos petrolíferos discount on diesel was only trimmed on 20 April — meaning through March, Portuguese pump prices tracked the Brent move almost fully. Diesel averaged €2.31 per litre at the end of March, gasoline 95 €1.94; both were up roughly 10 per cent year-on-year.

Why 2.7% matters

Three reasons. First, the State Budget 2026 was built on an average annual inflation assumption of 2.1 per cent. Three consecutive months above that figure would force a revision — and the IMF has already flagged 3.1 per cent as its own central projection for the year, well above the Ministry of Finance's working number. Second, the European Central Bank watches euro-area dispersion; Portugal moving back above the aggregate complicates the soft-landing narrative Frankfurt has been banking on since December. Third, real-wage arithmetic: the 2026 public-sector salary update was set at 2.15 per cent. A headline inflation print durably above that would mean another year of real-wage erosion for teachers, nurses and civil servants whose negotiations are currently stalled.

For households, the immediate effect is thin. Diesel has already retreated at the pump since 20 April. But if the Middle East oil risk premium sticks and Brent stays north of $80, the March spike will roll into April's CPI print — and with it, a political problem for a government already fighting on labour reform, nationality law, and the Lula visit's immigration optics.