Thailand tightens checks on cash transactions of 5 million baht and above

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The Bank of Thailand (BOT) will implement new rules from 1 November 2026, tightening checks on cash transactions of 5 million baht (US$148,000) and above. The rules cover cash deposits, exchanges of Thai baht banknotes, deposits of checks or drafts of unknown origin, as well as certain foreign currency transactions and payments for insurance, investment products and financial derivatives; banks must assess customer risk and, when necessary, require an explanation of the source and purpose of funds or supporting documents. They must not process transactions when verification cannot be completed.