Thai Chamber of Commerce University's forecasting centre estimates the 25–29 September 2026 floods caused about 12,283 million baht of economic damage in the base case (range 5,896–20,635 million), excluding property losses. Bangkok took about 7,014 million (57%); Chon Buri about 2,101 million, hit by Pattaya flooding that hurt tourism and retail. Impact is mainly on consumption, tourism, retail and services, not factory output. Expect lower footfall, cancelled tourist bookings, and delivery delays to some Bangkok retail branches. The forecast expects the flooding to ease within about a week and will be revised if it lasts longer.