Most Cross-Border Money Entering Thailand Never Passes Through a Bank

Data from the World Bank, IFC, ILO, and AMRO shows that formal bank-to-bank transfers account for as little as 5% of cross-border business flows into Thailand from Myanmar, and no more than 25% from Cambodia or Laos. Currency exchange intermediaries operating pooled settlement accounts carry the rest. The gap between how regulators assume money moves and how it actually moves has significant implications for enforcement, investment, and financial inclusion across the region.

Thailand receives more than USD 20 billion in cross-border money flows annually when all payment types are included. The majority of that sum, particularly flows originating in Cambodia, Laos, and Myanmar, arrives not through the correspondent banking system but through currency exchange intermediaries whose pooled Thai bank accounts act as domestic settlement vehicles. The funds show up as local transfers. They are, in effect, invisible to the frameworks that governments and international bodies use to track cross-border capital.

That invisibility is not a bug. It is a structural feature of how money moves across some of the most economically active corridors in Southeast Asia, shaped by banking infrastructure gaps, restrictive outbound transfer regulations, exchange rate controls, and the simple arithmetic of cost. Understanding it is a prerequisite for understanding how cross-border enforcement, investment risk, and financial inclusion policy interact across the region.

How the Money Actually Moves

When a customer deposits funds with a currency exchange provider in Cambodia or Myanmar, no international wire transfer is initiated. The exchange maintains pooled Thai bank accounts funded by its own operations. When it owes a beneficiary in Thailand, it pays from that domestic pool via local payment rails. What arrives in the recipient's account is a domestic Thai bank transfer, carrying no visible cross-border origin. The exchange reconciles its net position across borders separately, through back-office settlement or correspondent banking arrangements.

This settlement architecture is structurally different from a SWIFT wire, where specific funds move point-to-point between named accounts across borders. In the pooled model, a recipient has no visibility into which depositors contributed to the pool from which they were paid. The transaction does not appear in Thailand's balance-of-payments data as a cross-border flow. The UN Thailand Migration Report 2019 estimates that informal remittance flows from CLM countries may be double the size of officially recorded flows, meaning actual total flows from Myanmar, Cambodia, and Laos could be two to three times the figures that appear in World Bank bilateral data. The Bank of Thailand recorded 2,326 authorized foreign exchange operations as of 2021, but the informal segment operating along border areas is by definition uncounted.

The Scale of Informal and Semi-Formal Flows

The data on how dominant these channels are is unusually consistent across multiple independent sources. The ILO's 2017 survey of Myanmar migrant workers in Thailand found that only 2% used formal bank transfer mechanisms, while 55% used hundi agents, the broker network that has operated along the Thailand-Myanmar border for over five decades. The World Bank and International Growth Centre estimate over 90% of Myanmar remittances travel via informal channels overall. The AMRO Analytical Note (2024) documents that the 2021 coup intensified this further, with Myanmar's banking system now functionally inaccessible for most international transactions and internet banking capped at USD 1,500 per non-trade transfer.

For business flows specifically, the IFC and WTO's 2023 joint survey of banks and traders across Cambodia, Laos, and Vietnam provides the most authoritative available figures. Its findings challenge the assumption that trade flows through banks.

For context, developed economies see 60 to 80% of trade supported by bank-intermediated finance. The 97-point gap for Cambodia must be absorbed by something. The IFC survey identifies currency exchange arrangements, internal fund transfers, and informal settlement as the primary alternatives. It also notes explicitly that imports from China frequently involve payment arrangements that bypass the local banking system entirely.

Vietnam presents a more developed picture. Some 87% of Vietnamese adults hold payment accounts and 88% have used cashless payment methods, leading Southeast Asia in the digital transition. But Vietnam's Circular 20/2022 restricts outward transfers: organisations face a USD 50,000 per-remittance ceiling for qualifying transfers, individual transfers require documented 'reasonable need' assessments, and as of November 2025 all international electronic transfers of USD 1,000 or more trigger AML reporting. Getting money out of Vietnam remains structurally harder than getting it in. The IFC survey found that 74% of Vietnamese exporters and importers use internal funds rather than bank trade finance. That asymmetry pushes SME and mid-market business flows toward currency exchange and fintech platforms even where formal banking infrastructure exists.

Why Businesses Choose Currency Exchange Over SWIFT

The preference for currency exchange over formal bank transfers is not primarily about evasion. It reflects structural constraints that make SWIFT transfers impractical or prohibitively expensive for most businesses in the corridor.

A 2022 Chulalongkorn University study found that even large-scale border traders with annual sales exceeding THB 1 billion settle through informal offset systems, with an estimated USD 1.6 billion in annual Myanmar-Thailand border trade handled this way. Thailand's Ministry of Commerce mandated bank-based settlements for Myanmar-Thai border trade in November 2022, but enforcement has remained limited in practice.

The Compliance Question This Creates

The dominance of currency exchange intermediaries in regional money flows raises a question that regulators and enforcement agencies across the corridor are grappling with: when funds moving through a pooled account are alleged to be tainted, who bears liability?

Enforcement agencies, including Thailand's Anti-Money Laundering Office, have taken the position that tracing funds backward through a pooled account can establish a connection to predicate offences for downstream recipients. Critics of this approach, including legal practitioners and international compliance specialists, argue it inverts how both Thai law and international standards allocate responsibility.

Thailand's Anti-Money Laundering Act B.E. 2542 defines money laundering under Section 5 as acts to conceal or disguise the origin of assets connected with an offence. Reporting obligations under the Act sit with designated entities, specifically banks, licensed currency exchange operators, and remittance providers. Fines and criminal liability under Sections 60 and 61 flow to the reporting entity and its responsible officers. Legal analysts including Eversheds Sutherland note that the 'knowingly at the time of obtaining, possessing or using' standard in the AMLA means knowledge and intent remain required elements, not merely financial proximity to a tainted pool.

The FATF's Forty Recommendations, the internationally accepted AML standard, are similarly structured. Recommendation 10 places customer due diligence obligations on financial institutions in relation to their own customers. Recommendation 13, supported by FATF's 2016 Guidance on Correspondent Banking, explicitly states that institutions are not required to perform due diligence on the customers of their respondent banks. Recommendation 17 establishes that where institutions rely on third parties to conduct CDD, responsibility stays with the institution rather than passing downstream.

The legal framework, both domestically and internationally, is not ambiguous on this point. Thailand's AMLA places reporting obligations and criminal liability on designated reporting entities, not on the recipients of their settlement transfers. The FATF standards that Thailand has committed to uphold assign due diligence responsibility to the intermediary conducting the transaction. Where a currency exchange operator fails to conduct adequate KYC on its depositors, the enforcement consequence under both frameworks falls on that operator, not on the businesses or individuals who later receive a domestic baht transfer from its pooled account.

Legal analysts and compliance specialists argue that criminalising end recipients for the compliance failures of intermediaries they never contracted with, and whose upstream customer base they had no means to inspect, is not consistent with either the letter or the intent of the laws Thailand has enacted. It also sets a precedent with direct consequences for foreign investment: any party receiving funds through Thailand's dominant cross-border payment infrastructure becomes, in theory, retroactively liable for the conduct of every depositor who ever contributed to the pool.

Estimated Channel Breakdown by Corridor

Sources: IFC/WTO (2023), UNCDF SHIFT (2017), ILO (2017), World Bank/IGC, AMRO (2024). Business operator figures are synthesised estimates; no single published study directly measures the pooled settlement share as a distinct category.