Why Thailand's Central Bank Is Cracking Down on a Stablecoin and the Strong Baht

Thailand's central bank has taken an unusually direct stance on a corner of the crypto market, and the reason reveals a lot about the pressures facing the Thai economy. The Bank of Thailand has moved to curb trading of Tether's USDT stablecoin after flagging that an unusually large share of it involves foreign participants, raising concerns about so-called grey money flowing into the country and pushing up the value of the baht.

What the central bank found

According to a report by The ASEAN Frontier, Bank of Thailand Governor Vitai Ratanakorn said at the Blooming Thailand 2026 forum that USDT trading accounts for 52 percent of total digital asset trading in Thailand, a proportion he said should not be that high given the token's relatively stable price. More striking, he noted that around 40 percent of USDT trading in Thailand involves non-resident traders. His point was pointed: if you are a Singaporean trader, why would you bring your own USDT to trade on Thai exchanges? The implication is that some of this activity is not ordinary trading but a route for moving money.

The concern connects directly to the currency. The Thai baht strengthened by almost 8 percent in 2025, according to The ASEAN Frontier, which is a problem for an export-driven economy because a stronger baht makes Thai goods more expensive abroad. When foreign actors convert Tether USDT into baht, that buying increases demand for the currency and adds to the upward pressure. The central bank's view is that part of the baht's surge is being driven by unrecognized grey money inflows, including through USDT.

The measures the BOT is rolling out

The response goes well beyond USDT. According to The ASEAN Frontier, the central bank has introduced a package of measures to tackle money mules and abnormal transactions. These include additional conditions for large cash deposits and withdrawals, enhanced due diligence for high-value cash activity, and caps on the purchase of foreign banknotes, set at a maximum of 800,000 baht per person per day, tightened to 200,000 baht per person per day in border or designated areas. For e-money and e-wallet providers, the rules require connection to Thailand's Central Fraud Registry system, transaction limits based on the level of identity verification a customer has completed, and user profiling.

Mule accounts, accounts opened in one person's name but used to move someone else's illicit funds, are a central target. According to law firm analysis published on Global Legal Insights, Thailand's cybercrime law now empowers regulators to act against individuals who knowingly allow their accounts to be used as mule accounts, with penalties of up to three years imprisonment and fines of up to 300,000 baht. The SEC and the Thai Digital Asset Operators trade association have issued guidelines requiring digital asset operators to classify suspected mule-account holders as high-risk and to restrict or reject their services, according to Lexology.

A coordinated, whole-of-government push

This is not the central bank acting alone. According to Nation Thailand, the Bank of Thailand, the SEC, and the Stock Exchange of Thailand announced a coordinated effort to combat grey capital, tighten gold transaction controls, and prepare foreign exchange rules to manage the baht's strength amid a surge in cybercrime. The BOT is requiring gold shops to report all transactions, online or in-store, to give it a clearer picture of money trails, and is extending scrutiny to gold imports and exports including any settled with cryptocurrency. The SEC is working with the Anti-Money Laundering Office to speed up the freezing of criminal assets and integrating data between regulators, banks, and police to block transactions involving mule accounts quickly.

When 40 percent of a stablecoin's local trading comes from non-residents, the regulator stops seeing trading and starts seeing a money trail.

Why this matters for the financial sector

For banks, exchanges, e-wallets, and fintech operators in Thailand, this signals that financial integrity has become a top supervisory priority, and the compliance bar is rising fast. The Chambers and Partners Fintech 2026 guide notes that the BOT's December 2025 Guidelines for Digital Fraud Management introduced uniform end-to-end controls across prevention, monitoring, detection, and remediation for supervised payment operators. Operators that handle Thai baht conversions, customer onboarding, or cash and crypto flows now face expectations comparable to banking-sector standards.

For legitimate businesses, this is ultimately protective. A market overrun by grey money and mule-account fraud is a market where consumer trust collapses and honest operators get tarred by association. The crackdown, demanding as it is, pushes the ecosystem toward the transparency that well-run financial brands already practice.

What this means for brands

For financial brands operating in Thailand, the message is that robust compliance is now a competitive necessity, not a back-office afterthought. The brands that build strong KYC, clean transaction monitoring, and visible integrity into how they operate will earn the trust of both regulators and customers in an environment where both are watching closely.

FAQs

Q1: Why is the Bank of Thailand curbing USDT trading?

A1: Because USDT makes up 52 percent of Thai digital asset trading and about 40 percent involves non-resident traders, raising concerns about grey money inflows that push up the baht, according to The ASEAN Frontier.

Q2: What new measures has the BOT introduced?

A2: Tighter rules on large cash deposits and withdrawals, caps on foreign banknote purchases, mandatory connection to the Central Fraud Registry for e-wallets, and tier-based transaction limits, according to The ASEAN Frontier.

Q3: What is a mule account and what are the penalties?

A3: An account used to move someone else's illicit funds. Knowingly allowing your account to be used this way can bring up to three years imprisonment and fines up to 300,000 baht, according to Global Legal Insights.

Q4: Is this only the central bank's effort?

A4: No. The BOT, SEC, and Stock Exchange of Thailand are coordinating, along with the Anti-Money Laundering Office, on a unified crackdown on grey capital and cybercrime, according to Nation Thailand.

For brands entering Thailand, the integrity crackdown makes strong compliance a competitive advantage, and that is exactly where SpinDepth helps brands show up.

Source:

Source 1: The ASEAN Frontier, How a Stablecoin Is Driving the Baht's Surge, https://theaseanfrontier.com/p/how-a-stablecoin-is-driving-the-bahts

Source 2: Nation Thailand, Thai Regulators Launch Unified Crackdown on Scammers and Transnational Dirty Money, https://www.nationthailand.com/business/banking-finance/40059266

Source 3: Global Legal Insights, Blockchain and Cryptocurrency Laws 2026 Thailand, https://www.globallegalinsights.com/practice-areas/blockchain-cryptocurrency-laws-and-regulations/thailand/

Source 4: Lexology, Thailand Digital asset regulatory round-up 2025, https://www.lexology.com/library/detail.aspx?g=a3817f0d-fa22-4594-98e7-bff1d3e22971

Source 5: Chambers and Partners, Fintech 2026 Thailand, https://practiceguides.chambers.com/practice-guides/fintech-2026/thailand/trends-and-developments