South Korea's consumer price index increased 3.1% year-on-year in August 2025, up from 2.8% in July, according to data released by the Ministry of Data and Statistics on September 2. Oil products contributed 0.54 percentage points to the increase, while core inflation excluding food and energy stood at 3.4%. The month-on-month rise was 0.2%, below economist expectations of 0.3%.