Bank of Thailand Exchange Control for Foreigners: A Complete Guide

TL;DR

Thailand's foreign-exchange regime is administered by the Bank of Thailand (BOT / ธนาคารแห่งประเทศไทย) under the Exchange Control Act B.E. 2485 (1942) (พระราชบัญญัติควบคุมการแลกเปลี่ยนเงิน พ.ศ. 2485) and its Ministerial Regulations. Inward remittance is largely unrestricted; commercial banks (acting as authorised dealers) report transactions to BOT for compliance. Outward remittance generally requires supporting documentation, with documentation intensity rising with the amount and purpose. Foreign Currency Accounts (FCAs) are widely available to residents and non-residents alike, with progressively liberalised limits. Repatriation of foreign investment is permitted on production of documentary evidence (BOI certificates, share certificates, dividend resolutions). The Foreign Exchange Transaction (FET) form — formerly known as Tor.Tor.3 — is filed by the authorised dealer for transfers from abroad equivalent to or exceeding USD 50,000.

Legal Framework

The principal legislation is the Exchange Control Act B.E. 2485 (1942), promulgated on 15 December B.E. 2485 (1942) as a wartime measure and substantially retained in force since. Operative detail is found in:

• Ministerial Regulation No. 13 B.E. 2497 (1954) as amended — the implementing regulation listing what may be done by whom.
• BOT Notifications and Notices, issued under Section 8 of the Act and the Ministerial Regulation, which embody the day-to-day liberalisation framework. Major liberalisations were rolled out in B.E. 2562 (2019), B.E. 2563 (2020) and B.E. 2566 (2023).
• Anti-Money Laundering Act B.E. 2542 (1999) as amended, which overlaps with foreign-exchange compliance for cash and high-value transfers.

Operationally, commercial banks licensed as authorised agents (ตัวแทนรับอนุญาต) — including all major Thai commercial banks and licensed branches of foreign banks — perform front-line exchange control functions. The customer interacts with the bank, not directly with BOT.

Inward Remittance: Largely Unrestricted

Foreign currency may be brought into Thailand without limit. The funds may be: (a) converted to Thai baht and credited to a baht account; (b) credited to a Foreign Currency Account; or (c) held in cash (declarations apply at customs above prescribed thresholds — currently USD 20,000 equivalent for individual travellers).

Two reporting points to know:

• FET form is filed by the authorised dealer for inward transfers ≥ USD 50,000 (or equivalent). The customer provides the purpose of the transfer; the bank submits to BOT. The FET form is critical evidence for later repatriation — keep the original.
• Cash declaration at customs. Travellers entering or leaving Thailand with USD 20,000 or more must declare under Customs Department regulations and BOT cooperation. Failure to declare risks confiscation under the Customs Act B.E. 2560 (2017).

Outward Remittance: Documentation by Purpose

Out-flows are categorised by purpose. Each category has its own documentary regime, generally administered by the authorised dealer at the point of remittance. Common categories and current treatment:

Foreign Currency Accounts (FCAs)

Both residents and non-residents may hold FCAs at Thai authorised dealer banks. The product line has been substantially liberalised:

• Resident FCAs. Thai natural and juristic persons may hold FCAs in any major currency. Following the 2020 reforms, there is generally no cap on the FCA balance for funds derived from foreign sources; FCA balances funded from baht conversion of domestic income are subject to a per-customer ceiling that BOT periodically adjusts.
• Non-resident FCAs. Foreigners not resident in Thailand may freely open FCAs; deposits and withdrawals in foreign currency are unrestricted. Conversion to baht for transfer to a Thai baht account follows the FET reporting framework above.
• FCA-to-FCA transfers within the same bank or to overseas accounts are generally free of approval requirements but reportable for AML and BOT statistical purposes.

Foreign Currency Deposit (FCD) — Liberalisation

The historical distinction between Foreign Currency Deposits sourced from abroad and from domestic income has been progressively eased. The current framework permits residents to: (1) hold export proceeds in FCAs without compulsory conversion; (2) net cross-border receipts and payments via FCAs (subject to BOT reporting); and (3) use FCAs as collateral for foreign-currency lending. Companies engaged in cross-border trade should consult BOT's "Relaxation of Foreign Exchange Regulations" notices, which are updated approximately annually.

Repatriation of Foreign Investment

Foreign investors enjoy a strong statutory and policy commitment to repatriation. The BOI Investment Promotion Act B.E. 2520 (1977), Section 37 of which gives BOI-promoted investors the right to remit foreign currency abroad in respect of: (a) investment capital; (b) dividends; (c) loan principal and interest; and (d) royalties and fees, subject only to compliance with the Exchange Control Act and the Revenue Code. Non-BOI investors do not have a statutory entitlement but in practice repatriate freely on production of evidence.

Documentation required at repatriation typically includes:

• The original FET form evidencing the inward investment (or a certified bank confirmation if the form is lost — but losing it is a costly mistake).
• Share certificates and shareholders' register extract showing the foreign investor's holding.
• Board resolution declaring dividend (for dividend repatriation), withholding-tax certificate (50 Tawi for the 10% dividend WHT), and PND.54 filing.
• BOI promotion certificate and certificate of capital injection (for BOI cases).
• Sale & purchase documentation (for capital repatriation following share sale).

FET Form Thresholds and Filing

The Foreign Exchange Transaction Form (formerly Tor.Tor.3 / ธ.ต.3) is the key compliance instrument. Current rules:

• Threshold: filing required for transactions ≥ USD 50,000 (or equivalent), inward or outward.
• Filer: the authorised dealer bank — not the customer.
• Customer's role: provide accurate purpose, supporting documents, and (for inward investment) request a copy. The form is the primary evidence for future repatriation.
• Aggregation: structuring transactions to evade the threshold (e.g., five USD 30,000 transfers in a week) is treated as a single reportable event under BOT and AMLO guidance.

Reporting Through Authorised Dealer Banks

The compliance architecture relies on banks acting as gatekeepers. Customers should expect:

• Standard Know-Your-Customer (KYC) on every cross-border transaction, regardless of size.
• Source-of-funds enquiries for transactions above bank-internal thresholds (often lower than the FET threshold).
• Transaction monitoring for suspicious patterns; banks are obliged to report suspicious transactions to the AMLO under the Anti-Money Laundering Act.
• Periodic reporting by banks to BOT (FX Daily Report, monthly returns).

Crypto and Digital Assets

Foreign-exchange treatment of digital assets is evolving:

• Cryptocurrency and digital tokens are regulated principally under the Digital Asset Decree-Law B.E. 2561 (2018) (พระราชกำหนดการประกอบธุรกิจสินทรัพย์ดิจิทัล พ.ศ. 2561) by the SEC, not by BOT.
• BOT has restricted use of stablecoins as means of payment in domestic commerce since B.E. 2566 (2023) but has not banned their cross-border movement.
• Cross-border on/off-ramps via licensed Thai exchanges are subject to KYC and FET reporting if conversion to baht crosses the USD 50,000 threshold.
• Movements of crypto wallet-to-wallet across borders are not currently subject to FET reporting per se, but proceeds converted to fiat through a Thai bank become reportable at conversion.

Common Mistakes

Frequent compliance errors:

• Losing the FET form. Without it, repatriation of capital years later becomes a documentary nightmare. Scan and store securely.
• Bringing money into Thailand below USD 50,000 in many tranches to "stay below the threshold". The pattern itself triggers reporting.
• Treating an FCA as a free transit account for unrelated inflows and outflows — banks watch for layering and may freeze accounts.
• Repatriating dividend without filing PND.54 withholding tax — the bank will block the remittance until tax compliance is shown.
• Confusing the BOT exchange-control regime with Revenue Department requirements — they are separate. Compliance with one does not imply compliance with the other.
• Assuming crypto on-ramps are exempt — once the asset hits a Thai bank in fiat form, the FET regime engages.

FAQs

1. Can I bring USD 1 million into Thailand to buy a condominium?

Yes. Inward remittance is unrestricted. The bank will file the FET form (since the amount exceeds USD 50,000). Keep the FET form — it is your evidence of foreign-source funds for the Land Office's foreign-quota verification under the Condominium Act B.E. 2522 (1979) and for future repatriation.

2. Are foreign retirees subject to exchange control?

Retirees on long-term visas (O-A, LTR) generally fund their lifestyle from foreign pension and investment income remitted to a Thai baht or FCA account. There is no special exchange-control regime for retirees; ordinary inward and outward rules apply.

3. Can I send money home each month from Thailand?

Yes. The bank will require a brief explanation of purpose (family support, mortgage, savings). Frequent and consistent purpose-coded outflows are unproblematic. KYC documentation should match: keep employment records and tax filings (PND.91) accessible.

4. What happens if a transaction is rejected at the bank counter?

The bank refuses to process and provides a written reason — typically incomplete documentation, AML concern, or product/limit mismatch. The customer can: (a) supply additional documentation; (b) move to a different authorised dealer; (c) escalate to BOT's Foreign Exchange Administration and Policy Department for clarification. There is no formal appeal mechanism; persuasion at bank-product level is the practical recourse.

5. Does the FET threshold apply per transaction or aggregated?

Per individual transaction. However, a pattern of structured transactions just below USD 50,000 will be flagged by the bank and treated as a single event for compliance purposes, potentially triggering AMLO suspicious-transaction reporting under the Anti-Money Laundering Act B.E. 2542 (1999).

Related Reading

• Foreign Business Act
• BOI Promotion Overview
• Cryptocurrency Tax in Thailand