K-Research estimates the late September 2026 flooding in Bangkok, nearby provinces and more than 20 other provinces will cause 7-17 billion baht in economic damage. The initial disruption may last 3-7 days, hitting retail, restaurants, services, transport and small businesses that depend on customers visiting their premises. Impact could grow if floods persist or reach factories, industrial estates, or supply chains. K-Research advises operators to strengthen business continuity plans and says insurance and financial tools will matter for spreading risk. Day labourers may also lose income during the disruption.