Approximately 65-70% of condominium purchases by foreign buyers in Phuket and Koh Samui in 2026 involve instalment plans offered directly by developers. Mortgage financing from a Thai bank remains out of reach for most foreign nationals, which means developer payment plans have become the de facto standard mechanism for financing an off-plan purchase in Thailand.
Our analysts monitor payment schedules across dozens of active projects in key districts of Phuket (Bang Tao, Layan, Kamala, Surin, Rawai, Nai Harn) and Koh Samui (Bophut, Maenam, Chaweng, Lamai). Clear patterns emerge from our data sets: a typical plan spreads payments over 18-36 months during construction, and differences in payment structure have a measurable impact on total acquisition cost once currency exposure is factored in.
Quick answer
- Developer instalment plans in Thailand are formally interest-free, but the hidden cost sits in the base price of the unit, which our analysts estimate runs 5-15% above the equivalent cash price
- A standard booking fee runs 50,000-200,000 THB (roughly USD 1,400-5,600 at indicative 2026 exchange rates)
- The down payment on contract signing is typically 20-30% of the purchase price
- Remaining instalments are split into 6-24 monthly payments during construction
- The final payment on key handover (transfer stage) is usually 30-50% of the total price
- Every international wire into Thailand must arrive in foreign currency with a correctly worded reference; the FET (Foreign Exchange Transaction) form issued by the receiving Thai bank is required for transfers of USD 50,000 or above and is a prerequisite for freehold title registration and future capital repatriation
Options and scenarios
Scenario 1: Classic 30/70 schedule in Phuket
The most common structure in condominium projects across Bang Tao, Kamala and Surin. The buyer pays 30% of the purchase price within 30-60 days of reservation, and the remaining 70% on handover of the completed unit. This is the most straightforward plan logistically, requiring only two large international transfers. Based on our observations, developers using this structure are less likely to offer cash discounts, since the schedule is already simple.
Illustrative example: a condo priced at 6,000,000 THB in Kamala. Booking fee 100,000 THB, first payment of 1,700,000 THB within 30 days, final payment of 4,200,000 THB at handover 18-24 months later.
Scenario 2: Staged schedule - 20/40/40 or 20/instalments/40
Common in Koh Samui (Bophut, Maenam) and in the upper price segments in Phuket (Layan, Nai Harn). After a 20% down payment, the developer spreads the next 40% across monthly instalments during construction (typically 12-24 payments), with 40% due at handover. This reduces single-payment pressure but extends exposure to currency fluctuation over a longer window.
Illustrative example: a condo priced at 8,000,000 THB. Booking fee 100,000 THB, down payment 1,500,000 THB, then 18 monthly instalments of approximately 178,000 THB each, final payment 3,200,000 THB at handover.
Scenario 3: Full cash payment with discount
A number of developers offer 5-15% off the list price for a single upfront payment made during pre-sale or in the opening weeks of a project launch. Our team verifies these discounts on the ground and can confirm they are genuine, though they rarely exceed 10% in premium-segment projects. This scenario requires one large international transfer and places the buyer in full exposure to developer risk during the construction period.
Scenario 4: Leveraging assets held abroad
Some international buyers take out a mortgage or secured loan against property they hold in their home country and wire the proceeds to Thailand. The interest rate on such borrowing (indicatively 5-9% per annum depending on market, as of 2026) represents a real financing cost, but preserves liquidity. The key drawback is double currency exposure: the liability sits in one currency while the asset and any rental income are denominated in Thai baht.
Comparison table
| Parameter | 30/70 Classic | 20/Instalments/40 | 100% Cash | Offshore Leverage |
|---|---|---|---|---|
| Initial payment | 30% | 20% | 100% | Depends on loan terms |
| Number of tranches | 2-3 | 14-26 | 1-2 | 1-2 |
| Payment period | 18-24 months | 18-36 months | Up to 30 days | Single transfer |
| Hidden cost in price | 5-10% | 8-15% | None (discount 5-15%) | Interest 5-9% p.a. |
| Currency exposure | Moderate | High | One-off | Double |
| Developer risk | Moderate | Higher | Highest | Low (post-handover) |
| FET form required | On each transfer above USD 50,000 | On each transfer above USD 50,000 | Yes | Yes |
| Typical locations | Bang Tao, Kamala, Surin | Bophut, Maenam, Layan | Pre-sale Phuket | Location-independent |
How the FET requirement works in practice
The FET (Foreign Exchange Transaction) form is issued by the Thai bank receiving the inbound transfer. It confirms that funds arrived from abroad in a foreign currency. Under Bank of Thailand regulations, an FET is required for transactions equivalent to USD 50,000 or above and serves two critical functions:
- It is a prerequisite for registering a condominium unit under freehold title at the Land Office
- It documents the foreign-currency origin of funds, enabling legal capital repatriation after a future sale
Funds must arrive in Thailand as a foreign-currency international wire (EUR, USD, GBP or similar). A wire sent in Thai baht from an overseas bank does not qualify for FET purposes. The payment reference should include the buyer's full name, the purpose ('purchase of condominium unit') and the project name. Vague references such as 'investment' or the omission of a unit number can cause the receiving bank to decline FET issuance, which in turn blocks freehold registration.
Transfer costs: SWIFT vs. currency brokers
A standard SWIFT wire from an international bank typically costs USD 20-50 in fees plus a currency conversion spread of 1.5-3.0%. On a transfer equivalent to USD 120,000, that spread alone can amount to USD 1,800-3,600.
Specialist currency brokers (platforms such as Wise, OFX and comparable FX services) typically offer spreads of 0.3-0.8%, reducing the equivalent cost to roughly USD 360-960 on the same amount. The difference scales with transaction size. Settlement time is also faster: 1-3 business days for most brokers versus 2-5 business days for standard SWIFT transfers, plus 1-2 additional days for verification by the Thai receiving bank.
Currency risk in practice
Consider a condo priced at 5,000,000 THB bought on a 20/instalments/40 schedule over 24 months. At an indicative rate of 0.029 USD/THB (illustrative, to be verified against live rates), the total outlay is approximately USD 145,000. If the buyer's home currency weakens by 10% against the baht over the 24-month payment window, the final instalment of 2,000,000 THB costs roughly USD 6,400 more than it would at the opening rate. The reverse also holds: a strengthening home currency reduces the final outlay by a comparable margin. Our analysts recommend that buyers with instalment periods exceeding 18 months model both a 10% adverse and a 10% favourable scenario before committing to a payment schedule.
Risks and mistakes
- No discount means a hidden instalment cost. Thai developers do not charge nominal interest on payment plans, but the list price for instalment buyers is higher than the cash price. Based on our estimates, the gap is 5-15%. We always request the 'full cash' price and compare it against the standard list price before advising clients
- Incorrect SWIFT reference. Missing unit numbers, an incorrect project name, or a generic reference field ('investment', 'savings') can cause the Thai bank to reject the FET. This blocks freehold registration and can delay the entire transaction
- Wiring in Thai baht. Funds must enter Thailand as a foreign-currency transfer. A baht-denominated wire from an overseas account does not produce an FET, regardless of the amount
- Weak penalty clauses for developer delays. In most off-plan contracts in Phuket and Koh Samui, the standard penalty for delayed handover is minimal (around 0.01% per day) or entirely absent. We advise negotiating a clause allowing for refund of paid instalments if the delay exceeds 12 months
- Double currency exposure when leveraging home assets. A loan in one currency, an asset in baht, and rental income also in baht means that exchange-rate movements can erode rental yield returns before they are realised
- Insufficient developer due diligence. Instalments paid during construction carry no protection comparable to regulated markets. Our team verifies developer track records, EIA permits, land title documents and on-site construction progress before providing a recommendation
FAQ
Are developer payment plans in Thailand interest-bearing?
No. Standard off-plan payment schedules in Phuket and Koh Samui are formally interest-free. The financing cost is embedded in the base price of the unit, which our analysts estimate is 5-15% higher than the equivalent cash price.
What is a typical booking fee with a Thai developer?
Booking fees generally range from 50,000 to 200,000 THB (roughly USD 1,400-5,600 at indicative 2026 rates). The booking fee is usually non-refundable and is credited toward the purchase price.
Can I pay each instalment by international bank transfer?
Yes, but each transfer must be in a foreign currency (EUR, USD, GBP) rather than Thai baht. The payment reference must include the buyer's name, the unit number and the project name. For transfers of USD 50,000 or above, the receiving Thai bank will issue an FET form that documents the foreign-currency origin of the funds.
What happens if the developer does not complete the project?
Paid instalments are not protected by any statutory guarantee scheme equivalent to those found in some regulated markets. Recovery depends entirely on the terms of the purchase agreement and the developer's financial standing. Our team evaluates completed-project track records and verifies construction permits before recommending any development.
Can a foreign national obtain a mortgage from a Thai bank?
Options are very limited. A small number of banks operating in Thailand offer loans to foreign nationals, but requirements are strict: minimum loan amounts often start at 10 million THB, LTV ratios are capped at 50-70%, and documented in-country income is typically required. For most international buyers, this route is not practically accessible.
How should I model currency risk across a long payment schedule?
Sum all planned instalment payments in THB, then convert them at the current rate and again at a rate reflecting a 10-15% adverse currency move. The difference between the two figures represents your downside currency exposure. On a 5,000,000 THB purchase with a 24-month schedule, a 10% rate shift can translate to roughly USD 6,000-8,000 in additional cost on the outstanding balance.
Is a full cash payment worth it to capture the developer discount?
A 5-15% discount is a meaningful saving, but it comes with full exposure to developer risk during construction. Based on our data, we only consider this option suitable for developers with a documented track record of completed projects in Phuket or Koh Samui.
How do payment schedules differ between Phuket and Koh Samui?
In Phuket, the 30/70 and 20/80 structures dominate in larger condominium projects across Bang Tao and Kamala. In Koh Samui (Bophut, Maenam), staged 20/instalments/40 plans are more common, with build periods of 24-36 months reflecting the smaller scale of individual projects.
Does every individual instalment transfer require a separate FET form?
An FET is issued by the Thai bank for inbound foreign-currency transfers at or above the USD 50,000 threshold. Smaller individual tranches may not each trigger a separate FET, but the cumulative foreign-currency origin of all funds must be documentable at the point of title registration. Our analysts recommend that every transfer carry a correctly worded reference to support FET issuance retrospectively if needed.
How long does an international wire transfer to Thailand take?
A standard SWIFT wire from most international banks takes 2-5 business days to reach the Thai receiving account. Specialist currency brokers typically settle in 1-3 business days. Allow an additional 1-2 business days for verification processing at the Thai bank before funds are confirmed as received.
Based on our analysis of the 2026 market, we view developer instalment plans as a risk-distribution tool rather than a cost-free credit facility. The key variables to assess are: the price differential between the instalment rate and the cash price, the length of currency exposure on outstanding tranches, and the credibility of the developer. Before committing, buyers should model the true cost of the instalment path (including the foregone cash discount and currency risk) against the cost of full upfront payment or financing from their home country.
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