SEJONG, SOUTH KOREA / RankWire.AI / – In the broader context of rising inflationary pressures, South Korea’s consumer price index experienced an increase of 3.1% in August compared to the previous year, according to official figures. This rate marked an uptick from 2.8% in July and once again surpassed the 3% threshold. Consumer prices also saw a month-on-month growth of 0.2%. The Ministry of Data and Statistics indicated that the consumer price index reached 120.05, using 2020 as the baseline with a value of 100. A significant portion of this annual increase was driven by higher costs in fuel and mobile services.
South Korea’s consumer inflation surged to 3.1% in August from a year prior, with official data revealing the acceleration. The inflation rate, which was 2.8% in July, crossed the 3% mark again. Prices also grew by 0.2% from July to August. The Ministry of Data and Statistics reported that the consumer price index reached 120.05, based on a 2020 benchmark of 100. Fuel and telecom costs were primary factors behind much of the yearly increase.
Petroleum prices saw a notable 14.2% rise from August 2025, adding strain to household transportation expenses. Diesel costs increased by 19.6%, while gasoline prices grew by 11.5%. These petroleum products contributed 0.54 percentage points to the annual inflation figure. Overall, transportation costs advanced by 7.2% compared to the previous year. The government stated that nationwide fuel price caps helped reduce August’s inflation by roughly 0.3 percentage point, partly offsetting the impact of higher energy prices.
Communication expenses also saw sharp increases, largely due to a low base comparison from the previous year. Mobile phone service charges surged 26.7% from August 2025. SK Telecom had offered substantial one-month discounts following a data breach during the same period last year. The government estimated that without the mobile service effects, annual inflation would have been approximately 2.5%. The category of communication prices overall increased by 16.6%, ranking among the largest annual gains within the consumer basket.
Rising Fuel and Telecom Costs Drive Consumer Price Increases
Price pressures outside of the headline inflation figure also intensified. Core inflation, excluding food and energy, rose by 3.4% from a year earlier, marking the highest increase since May 2023. A separate measure excluding agricultural products and petroleum advanced by 3.1%. The index for essential living items, which monitors common household purchases, increased by 3.2%. Within this index, food prices climbed 0.8%, whereas nonfood expenses grew by 4.8% year-over-year.
Broad increases were also observed in industrial goods and service sectors during August. Prices for industrial products rose by 3.7%, with service costs increasing at the same rate. Electricity, gas, and water expenses increased by 0.4%. Insurance premiums jumped 13.4%, and overseas package tour prices rose 14.9%. Restaurant and accommodation costs went up by 2.8%, while recreation and culture expenses grew by 4.9%, contributing to the overall rise in service-related expenditures.
Food Prices Decline Despite Overall Inflation Rising
Prices for agricultural, livestock, and fishery products experienced a decrease of 2.6% compared to the previous year. Fresh food prices fell 6.7%, primarily driven by declines in vegetables and fruits. Vegetables prices dropped 9.8%, and fruit prices decreased by 10%. Conversely, fresh fish and seafood prices increased by 4.1%. Imported beef prices rose by 6.2%, while domestic beef prices went up by 3.3% over the same period.
The August data revealed uneven inflation across key household expenditure categories. Housing, water, electricity, and fuel costs rose 1.9% year-over-year. Meanwhile, food prices remained relatively subdued as fresh produce became cheaper, whereas energy, communication, and various service sectors experienced larger price gains. The overall 3.1% inflation rate reflects these contrasting movements within the consumer basket. Additionally, the data indicates that temporary mobile pricing effects and increased petroleum costs played a significant role in South Korea’s annual inflation increase.