From October 2026, the Bank of Thailand (BOT) requires foreign property buyers to document the origin of funds for any foreign currency transaction exceeding 200,000 USD. Exchange Control Officer's Notification No. 38 (referred to throughout as Circular 38) sits on top of the existing FET form requirement, creating a two-tier capital-entry control system. Our analysts have tracked these changes since they were announced; what follows is a precise, mechanics-first breakdown aimed at international buyers purchasing condominium units in Phuket or Koh Samui.
The practical effect is unambiguous: a transfer for a condominium priced above 200,000 USD (approximately 7.2 million THB at indicative 2026 exchange rates) now requires both a correctly completed FET form and supplementary source-of-funds documentation. Based on BOT communications covered by Thai Rath in October 2026, the regulator has explicitly stated that a receiving bank's own KYB (Know Your Business) checks do not substitute for the primary source documents.
Quick answer
- Documentation threshold: foreign currency transactions of 200,000 USD or more require source-of-funds documents under BOT Circular 38 (effective October 2026)
- FET remains mandatory: the Foreign Exchange Transaction form is required for every overseas transfer used to purchase a freehold condominium, regardless of amount
- Cash purchase limit: buying foreign currency in cash is capped at 15,000 USD per day; anything above that requires source documentation
- Consequence of incomplete paperwork: the Thai receiving bank may refuse to issue an FET, which in turn blocks freehold title registration at the Land Office
- Timing matters: source documents must be assembled before the first transfer, not retrospectively
- Universal scope: the rules apply to all foreign nationals, irrespective of home country or visa status
Options and scenarios
How the FET form works and why a wire transfer alone is no longer sufficient
The Foreign Exchange Transaction (FET) form is issued by the Thai bank at the point of converting incoming foreign currency into Thai baht. It serves two functions: it confirms that capital entered Thailand from abroad in foreign currency, and it acts as the foundational document for registering a freehold condominium in a foreigner's name at the Land Office. Without an FET that carries a correctly worded payment reference (identifying the property purchase, unit number, and project name), ownership registration is not possible.
Before October 2026, the process was relatively linear: a SWIFT transfer in foreign currency, conversion at a Thai bank, receipt of the FET form. Circular 38 adds a new layer: for amounts at or above 200,000 USD, the receiving bank must now verify and archive documents confirming the origin of those funds.
What source-of-funds documents are required
BOT has not published a closed list of acceptable documents. Based on our review of the circular's text and observed bank practice, we identify the following categories:
- Bank statements covering the past 6-12 months, demonstrating balance history
- Asset sale agreements (for example, confirmation of a property disposal in the buyer's home country)
- Income documentation (tax returns, employment certificates, B2B contracts)
- Dividend or capital gains confirmations from brokerage accounts
- Inheritance or gift documentation with notarised confirmation
In our assessment, documents should be in English or accompanied by a certified translation. The Thai bank retains the right to request additional clarification if it considers the documentation insufficient.
Scenario 1: Condominium purchase below 200,000 USD
For transactions below the threshold (for example, a studio unit in Karon priced at approximately 3.5 million THB, or around 100,000 USD), the process is unchanged. An FET with a correctly worded transfer reference is required, but supplementary source-of-funds documentation is not mandatory. Market data from Nation Thailand (October 2026) shows that several new projects in the mid-range bracket offer units that typically fall below this threshold.
Scenario 2: Condominium purchase above 200,000 USD
This is the standard situation for a buyer acquiring a two-bedroom sea-view unit in Bang Tao, Surin, or Bophut on Koh Samui, where premium unit prices routinely reach 8-12 million THB. Both elements are required: the FET form and full source-of-funds documentation. Payment schedules in off-plan projects (typically spread across 12-24 months) add complexity, because each individual transfer above the threshold triggers the documentation requirement independently.
Scenario 3: Staged payments that cumulatively approach the threshold
The most common payment structure in Phuket developer projects runs as follows: 30% at reservation, 30% during construction, 40% at handover. Based on our analysis, if a single transfer does not exceed 200,000 USD, the documentation requirement is not formally triggered for that instalment. However, the Thai receiving bank will see a sequence of transfers from the same originator and may request explanations. We recommend preparing source documents regardless of individual transfer size.
Comparison table
| Parameter | Direct SWIFT from home-country bank | FX broker (e.g. Wise, OFX) | Transfer via correspondent bank |
|---|---|---|---|
| FX spread | 1.5-3.0% (indicative, 2026) | 0.4-1.2% (indicative) | 0.8-2.0% (indicative) |
| Transfer fee | USD 20-55 + correspondent charges | USD 0-40 (amount-dependent) | USD 25-80 |
| Processing time | 2-5 business days | 1-3 business days | 2-4 business days |
| Single-transfer limit | No cap (above 200,000 USD triggers BOT documentation) | Platform-dependent (often 50,000-500,000 USD) | No cap |
| Editable payment reference | Yes, full control | Limited text field - truncation risk | Yes, full control |
| FET issued by Thai bank | Yes, if foreign currency arrives at Thai bank account | Depends on routing - some platforms convert before dispatch (no FET possible) | Yes, if foreign currency |
| Compliance with Circular 38 | Full, provided source documents are attached | Requires verification - not all platforms are accepted | Full |
Critical error: converting currency before the transfer
If an FX broker converts the source currency into THB and sends baht directly to the developer's account, the Thai bank will not issue an FET. The funds did not enter Thailand as foreign currency. This is the most common and most costly procedural error we observe among international buyers. Funds must be dispatched in EUR or USD to a Thai bank account, where the local conversion takes place.
Risks and mistakes
FX rate exposure across a staged payment schedule
A buyer purchasing a condominium at 10 million THB with payments spread over 18 months carries sustained exposure to the THB exchange rate. As a rough reference point, a 5% adverse move in the buyer's home currency against the baht raises the total acquisition cost by approximately 5% in home-currency terms - on a 10 million THB purchase, that is a meaningful difference under stress scenarios. We recommend verifying the current rate with a licensed FX adviser before each instalment.
Most common documentation errors
- Incorrect payment reference: omitting the unit number, project name, or the phrase 'for purchase of condominium unit' causes the Land Office to reject title registration
- Transfer from a corporate account: if the condominium is to be registered in an individual's name, funds must originate from that individual's personal account
- Untranslated source documents: the Thai bank may not accept documents submitted solely in a language other than English without a certified translation
- Splitting transfers to stay below the threshold: deliberate structuring of transactions to avoid the 200,000 USD trigger is detected by bank compliance systems and may result in funds being frozen
- Sending funds in THB instead of foreign currency: this prevents the Thai bank from issuing an FET
Consequences of incomplete documentation
Without a complete FET and the required source-of-funds documents, freehold title registration becomes impossible. Funds may be returned to the originating account, but the round-trip conversion costs and processing delays - typically several weeks to months - carry a direct financial cost. In some cases, the developer's contract may allow penalty charges for payment delays.
One longer-term consideration: the FET is also required when repatriating sale proceeds after a future disposal. Without a preserved FET from the original purchase, a seller may face difficulties transferring capital out of Thailand years later. Circular 38 reinforces this linkage by aligning inbound documentation requirements with outbound repatriation records.
Financing options for foreign buyers
A mortgage from a Thai commercial bank is, in practice, unavailable to foreign nationals without permanent residency. A limited number of regional banks (including certain Singapore-based institutions) offer property financing, but typical terms require a 40-50% down payment and carry indicative interest rates of 5-7% per annum (as of 2026). The main alternatives are:
- Developer instalment financing: standard terms show 0% interest during the construction phase (12-24 months), though our estimates suggest the financing cost is embedded in a unit price that runs 5-15% above the equivalent full-payment price
- Leverage against home-country assets: a mortgage or securities-backed loan in the buyer's home country, with proceeds transferred to Thailand - this approach introduces FX risk and requires home-country credit capacity
- Private loans: in use among buyers, but carrying no regulatory protection
For market context: Nation Thailand (October 2026) reported that developer-led projects in Phuket, including launches in the Kata and Karon districts with combined values exceeding 2.5 billion THB, cite projected rental yields of 7.8-8.4% per annum. These projects target foreign buyers, which means the capital transfer mechanics described here apply directly to anyone evaluating them.
FAQ
What is the FET form and why is it essential for buying a condominium in Thailand?
The FET (Foreign Exchange Transaction) form is issued by the Thai receiving bank to confirm that purchase funds entered Thailand from abroad in foreign currency. Without it, the Land Office will not register freehold title in a foreigner's name. The FET is also required when repatriating sale proceeds after a future disposal.
What is the monetary threshold under BOT Circular 38 in 2026?
Circular 38 (Exchange Control Officer's Notification No. 38, effective October 2026) requires source-of-funds documentation for foreign currency transactions of 200,000 USD or more. This covers both single transfers and transactions that the receiving bank determines are related.
Can funds be sent directly to the developer's account in Thai baht?
No. Funds must arrive at a Thai bank account in foreign currency (EUR, USD, GBP, or similar) so that the bank can perform the conversion and issue the FET. A transfer that has already been converted to baht before arrival, or one sent directly in baht, does not generate an FET and makes freehold registration impossible.
What source-of-funds documents should be prepared for a transfer above 200,000 USD?
The Thai receiving bank typically expects bank statements, asset sale agreements, income tax documentation, dividend or capital gains confirmations, or inheritance and gift records. All documents should be in English or accompanied by a certified translation.
Does splitting a transfer into smaller amounts avoid the Circular 38 requirements?
No. Deliberate structuring of transactions to stay below the 200,000 USD trigger is flagged by bank compliance systems. Detection can result in frozen funds and refusal to issue the FET. Banks analyse series of transfers from the same originator.
How much does an international SWIFT transfer to Thailand typically cost?
Based on our estimates for 2026, indicative costs run from USD 20-55 in bank fees plus an FX spread of 1.5-3.0%. Additional correspondent bank charges may apply. FX brokers offer lower spreads (0.4-1.2%) but not every platform guarantees a routing path that produces a valid FET.
How does exchange rate volatility affect the total cost of a staged-payment purchase?
On a 10 million THB purchase with instalments spread over 18 months, a 5% adverse move in the buyer's home currency against the baht increases the total cost in home-currency terms by approximately 5%. We recommend consulting a licensed FX adviser before each payment tranche.
Can a foreign national obtain a mortgage from a Thai bank?
In practice, no. Thai commercial banks do not extend mortgage financing to foreign nationals without permanent residency. Certain Singapore-based regional banks may finance purchases at 40-50% loan-to-value, with indicative interest rates of 5-7% per annum as of 2026, but these products are not widely accessible.
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