Mercadona, Spain’s largest supermarket chain, is feeling the effects of persistent inflation: its market share has stopped growing as rivals Dia and Lidl draw more customers. In August, inflation reached 4.3% year on year, its highest level since February 2023 and up from the previous month, information from finalized data from the Instituto Nacional de Estadística (INE). The figure reflects a broad rise in consumer prices across Spain.
Higher fuel costs are the basic driver, with oil prices once again above 100 dollars per barrel. Inflation has remained high, while the underlying rate, excluding energy and fresh food, stood at 2.9%. That was slightly lower than in July but still well above the European Central Bank’s 2% target. INE and other official sources cite fuel, particularly gasoline and diesel, alongside broader energy costs as the basic reasons for the increase. Reuters reported that Spain’s harmonized consumer price index (HICP) for the EU reached 4.6% year on year in August, outpacing the national CPI and the eurozone average, a sign of stronger inflationary pressure.
Food and non-alcoholic beverage inflation has slowed to 2.3% annually, but overall price pressures are changing how people shop. More consumers are choosing discount chains such as Dia and Lidl, narrowing Mercadona’s lead. The Ministry of Economy links the August inflation jump mainly to fuel, citing the ongoing energy shock tied to the conflict in Iran and a base effect from last year’s price drop. Regional and sector reports show discounters gaining ground, while Mercadona faces tougher competition in several provinces.
Earlier this year, inflation seemed under control, just above the ECB’s preferred range. That changed after the United States and Israel launched strikes against Iran in late March. Disruptions to basic trade routes, particularly through the Strait of Hormuz, a passage for a quarter of the world’s oil and gas, have kept global energy markets under pressure. A brief truce in June between the US and Iran did not ease these bottlenecks, leaving international prices high and Spanish consumers exposed. Independent European media and energy analysts point to continued tension around oil supply routes as a steady driver of energy-led inflation across Europe.
Government measures to soften the blow, including a 20-cent per litre diesel discount and a 5-cent per litre gasoline subsidy, remain in place but are due to expire at the end of September. OKDiario reports that fuel and electricity prices are rising faster than wages, eroding household purchasing power and putting more pressure on Spanish consumers as relief measures near their expiration. With the geopolitical crisis unresolved and no new support announced, households face growing uncertainty about future costs.
Mercadona’s stalled growth reflects how external shocks and policy limits are affecting Spanish retail. As inflation continues and government relief ends, discount chains able to keep prices lower or adapt quickly are gaining an edge. INE data highlights the strain on Spain’s consumer economy; without new action, household budgets and established market leaders such as Mercadona are likely to face mounting pressure in the coming months.
