Bank of Thailand Tightens Cash Deposit Regulations for Large Transactions

The Bank of Thailand (BOT) has announced an expansion of its regulatory framework concerning large cash transactions. According to a report by Thai Post, starting November 1, 2026, financial institutions will be required to perform Enhanced Due Diligence (EDD) on any cash deposit totaling 5 million baht or more.

Under these new guidelines, banks must mandate that customers provide detailed documentation regarding the source of the funds and the specific purpose of the transaction. The level of documentation required will be determined by the bank’s assessment of the customer's risk profile. The BOT stated that this measure is designed to align with the 'Bangkok Blueprint for Fraud-Resilient Financial Services,' aiming to strengthen the integrity of the national financial system.

For residents and expatriates in Thailand, this change means that individuals planning to deposit significant amounts of cash should be prepared to provide clear evidence of the money's origin and intent. Failure to provide sufficient documentation may result in the rejection of the transaction. While the policy is clearly defined, it remains to be confirmed how individual banks will standardize their internal risk assessment processes and what specific types of documents will be universally accepted as proof of source. Those managing large cash holdings are advised to consult with their local bank branch to ensure compliance before the November deadline.