Rangsit University launched the Thailand Household Cost of Living Index (CLI), revealing a sharp increase in living costs since Q2 2026 driven primarily by rising oil prices. National average household expenses rose 8,362.4 baht per quarter (2,787.5 baht monthly), with Bangkok and suburbs facing the heaviest burden at 10,170.3 baht per quarter (3,390.1 baht monthly). Transportation costs account for nearly half the increase. SMEs, farmers, and regular employees are most impacted, with significant regional disparities across Thailand.