For buyers purchasing a condo in Phuket in the 3-8 million THB segment, payment schedules typically run 12-24 months. Over that window, exchange rates can shift 8-15% from the rate in effect on the day contracts were signed. The practical consequence is straightforward: the final cost in any home currency may differ from the original budget by a material amount - with no change whatsoever in the Thai baht price.
Our analysts have monitored the PLN/THB rate since 2021. Between January 2023 and Q1 2026, the rate moved within an indicative range of 8.8-10.2 PLN per 100 THB (based on our estimates, cross-referenced against National Bank of Poland and Bank of Thailand data). For a 5 million THB transaction, the spread between the extremes of that range translates to a cost difference on the order of 70,000 PLN. That is a real, quantifiable exposure that requires active management from the reservation stage onward.
Quick answer
- A standard off-plan condo payment schedule in Phuket involves 3-6 instalments spread across 12-24 months of construction
- The PLN/THB rate fluctuated by approximately 8-15% annually between 2023 and 2026, based on our estimates drawn from central bank data
- The FET (Foreign Exchange Transaction) form is mandatory for inward transfers equivalent to 50,000 USD or more - without it, freehold registration at the land office will be refused
- A SWIFT transfer from a European bank typically costs 100-250 PLN in fees, but the dominant cost is the bank's currency spread, which routinely reaches 1.5-3%
- Specialist foreign exchange brokers (platforms such as Wise or OFX) offer spreads of 0.3-0.8%, which on a 5 million THB transaction represents a saving of roughly 15,000-50,000 PLN relative to a retail bank transfer
- Developers in Phuket and Koh Samui do not offer exchange-rate protection; payment schedules are denominated in THB or USD
Options and scenarios
Scenario 1: single lump-sum payment on key handover
Some developers, particularly in Kamala and Bang Tao, permit a single 100% payment at project completion. From a currency-risk perspective this is the highest-exposure option, concentrating the entire transaction at one exchange-rate point in time. If the rate is unfavourable on handover day, the buyer has no room to manoeuvre. The offsetting advantage is administrative simplicity: one SWIFT transfer, one FET document.
Scenario 2: the standard 30/30/40 schedule
The most common off-plan structure across Phuket: 30% on contract signing, 30% at structural completion, and 40% at handover. This schedule provides natural, if modest, currency diversification. The buyer converts funds at three separate rate points, achieving a de facto average rate. Based on our estimates, for a 5 million THB condo on an 18-month schedule, the rate differential between instalments averages 4-7% in either direction.
Scenario 3: monthly instalment plan from the developer
Certain developers in Rawai, Nai Harn, Bophut (Koh Samui), and Maenam (Koh Samui) offer 12-36 monthly instalments at zero stated interest. This structure provides the strongest natural rate averaging, spreading exposure across a dozen or more exchange-rate points. The drawbacks are higher SWIFT transfer costs and the administrative burden of correctly referencing each payment. Critically, zero interest does not mean zero cost: the per-unit price under instalment plans is typically 5-15% higher than the lump-sum price, implying an effective financing rate of approximately 4-9% per annum by our estimates.
Scenario 4: forward contract or currency hedging
Buyers can fix the exchange rate on future instalments using a forward contract on the relevant currency pair. This typically requires a margin deposit of 5-10% of the contract value and is generally available for amounts from approximately 100,000 PLN upward. Not all brokers quote the PLN/THB pair directly; many route the transaction via USD or EUR, which introduces an additional spread layer. For larger transactions, the certainty of a fixed rate often outweighs the margin cost.
Comparison table
| Parameter | Lump-sum payment | 30/30/40 schedule | Monthly instalments (12-36 mo.) | Forward contract |
|---|---|---|---|---|
| SWIFT transfers required | 1 | 3 | 12-36 | 1 (plus forward contract) |
| Currency rate exposure | Very high (single point) | Medium (3 points) | Low (rate averaging) | Minimal (rate fixed) |
| Indicative bank spread cost (5 million THB) | 22,000-70,000 PLN | 22,000-70,000 PLN (total) | 22,000-70,000 PLN (total) | 7,000-18,000 PLN (broker rate) |
| Transfer administration cost | Low (approx. 100-250 PLN) | Medium (approx. 300-750 PLN) | High (approx. 1,200-9,000 PLN) | Medium plus margin deposit |
| Developer price premium | None, or 3-5% discount | None | 5-15% higher unit price | Not applicable |
| FET requirement | Yes (1 document) | Yes (per instalment above threshold) | Yes (per instalment above threshold) | Yes |
| Availability in Phuket | Kamala, Bang Tao, Surin | Widespread | Rawai, Nai Harn, Koh Samui | Broker-dependent |
Risks and mistakes
Incorrect SWIFT transfer reference
This is the most frequent issue we document among international buyers. For a Thai bank to issue the FET form, the inbound transfer must carry a precise reference that identifies the transaction purpose - for example: 'Purchase of condominium unit at'. Generic references such as 'property purchase' or 'investment' are routinely rejected by receiving banks. Without a correctly issued FET, the land office will refuse to register freehold title in a foreign buyer's name.
Sending the transfer in a non-convertible home currency
Funds must arrive in Thailand in a foreign currency (USD, EUR, GBP) and be converted to THB by the Thai receiving bank. Transfers in currencies that Thai banks do not actively trade are either refused or converted at extremely unfavourable rates. Our recommendation is to convert to USD or EUR on the originating side - through a currency broker rather than a retail bank counter - before initiating the SWIFT transfer.
Omitting currency risk from ROI calculations
Many buyers calculate rental yields (typically 5-7% net per annum in Phuket, per our 2025 data sets) in Thai baht, then overlook that repatriating profits reintroduces exchange-rate exposure. The prevailing rate at the moment of each rental income transfer can erode 2-4 percentage points of annual return, depending on rate movement.
No buffer for home-currency depreciation
For payment schedules running 18-24 months, we recommend budgeting a 10-12% currency reserve above the nominal transaction value. This buffer accommodates potential depreciation of the buyer's home currency against the baht. Without it, a buyer may face a liquidity shortfall on the final instalment.
Hidden cost of developer instalment plans
Zero-interest instalment financing from developers in Rawai, Nai Harn, Bophut, or Maenam looks attractive on the surface. In practice, the unit price under instalment terms is 5-15% above the lump-sum price, implying an effective annual financing cost of 4-9% by our estimates - comparable to a secured mortgage rate in many European markets.
Very limited mortgage options for foreign buyers
As of 2026, mortgage financing for foreign nationals in Thailand remains highly restricted. A small number of regional banks (Singapore-based, Hong Kong-based) offer financing secured against assets in the buyer's home country, with minimum down payments of 30-50% and indicative rates of 5-8% per annum (per market estimates, 2026). Using equity released from a property in the buyer's home market and transferring the proceeds to Thailand is an alternative, but it creates a double layer of currency exposure on both the loan and the property investment.
FAQ
What is the FET form and when is it required for a Phuket condo purchase?
FET (Foreign Exchange Transaction form) is a document issued by the Thai receiving bank confirming that funds arrived from abroad in a foreign currency. It is required by the land office to register condominium freehold title in a foreign national's name. The threshold that triggers the FET requirement is an inward transfer equivalent to 50,000 USD or more. Without a valid FET, title transfer will not proceed.
How much does a SWIFT transfer from Europe to Thailand cost in 2026?
Bank processing fees for a SWIFT transfer run approximately 100-250 PLN (or equivalent) per transaction. The larger cost is the currency spread applied by the sending bank, typically 1.5-3% of the transfer value. On a 5 million THB transaction (indicatively 450,000-500,000 PLN at Q1 2026 rates), the spread alone accounts for roughly 7,500-15,000 PLN.
Can I send funds directly in my home currency to the developer's Thai account?
Most Thai banks do not actively trade currencies such as PLN, or apply highly unfavourable conversion rates to them. We recommend converting to USD or EUR through a specialist currency broker on the sending side, then initiating the SWIFT transfer in that foreign currency.
How can I reduce currency risk across a multi-instalment schedule?
The most effective approaches are: a forward contract locking in the rate for future instalments; spreading payments across more tranches to average the rate over time; and budgeting a 10-12% currency reserve above the nominal transaction value. Using a specialist FX broker rather than a retail bank also reduces the spread cost significantly.
Do Phuket developers accept payment in EUR or USD?
Most developers accept USD, EUR, or THB. The listed price may be denominated in USD or THB depending on the project. Regardless of the payment currency, funds must arrive from outside Thailand in a foreign currency to generate a valid FET.
What is the true cost of a developer instalment plan?
Based on our estimates, the unit price under a 12-36 month instalment plan is 5-15% above the equivalent lump-sum price. The implied effective annual financing rate is approximately 4-9%, which is comparable to secured lending rates in many European markets.
What transfer reference should I use to ensure the FET is issued correctly?
The reference must be specific and unambiguous: 'Purchase of condominium unit at'. Vague descriptions are rejected by Thai banks and will prevent FET issuance.
Is the FET document needed when selling the condo and repatriating proceeds?
Yes. The FET is the primary evidence required by Thai banks to confirm that the original capital entered Thailand legally from abroad. Without it, repatriation of sale proceeds may be blocked or significantly delayed.
By how much can the THB-denominated condo cost shift in a buyer's home currency during construction?
For a 5 million THB condo on an 18-month schedule, a 10% movement in the exchange rate produces a cost difference of approximately 45,000-50,000 PLN (indicative values, based on Q1 2026 rate levels). We recommend checking the current rate with a currency adviser before each instalment payment.
Are there any foreign-currency mortgage options for condo buyers in Thailand?
Options are very limited as of 2026. A small number of Singapore-based and Hong Kong-based banks will lend against Thai property, subject to 30-50% down payments and rates of 5-8% per annum. Domestic Thai bank mortgages for foreign nationals are not a realistic option in practice.
The central finding from our analysis is that currency risk in a Phuket or Koh Samui condo purchase is a real, quantifiable cost that requires active management rather than a passive assumption. The 30/30/40 schedule provides moderate rate diversification but does not eliminate exposure. For transactions above 2 million THB, a forward contract or a specialist currency broker - who can reduce the spread by 1-2 percentage points relative to a retail bank - is worth evaluating seriously. Every instalment payment should be preceded by a check of the transfer reference against FET requirements.
Researching property in Phuket or Koh Samui? Get in touch - our analysts will prepare a data brief for your shortlisted location.