In August 2026, Thai enforcement authorities extended their scrutiny of Koh Samui and Koh Phangan to include 30-year lease agreements - structures that many foreign buyers had previously regarded as a safe alternative to direct land ownership. According to Thai Examiner reporting from August 2026, approximately 8,000 local companies are under review, 2,579 suspected nominee operations have been identified, 138 cases have been classified as urgent for land-related action, and police are executing 101 arrest warrants.
Our analysts have monitored the secondary villa market on Phuket and Koh Samui for several years, and the data from these enforcement actions reinforces a view we have held for some time: the leasehold model carries more structural complexity than developer marketing materials typically convey. Below, we break down the legal mechanics, realistic exit scenarios, and the investment arithmetic.
Quick answer
- Land leases of up to 30 years are legal under Thai law (Civil and Commercial Code, sections 537-571), but renewal for further periods is not legally guaranteed - it is a contractual promise only, not a registered property right
- The 2026 enforcement campaign targets structures where a leasehold is used as a de facto workaround to the foreign land-ownership prohibition, rather than as a straightforward tenancy
- More than 800 new villas across 70-80 projects were completed on Koh Samui in the first half of 2026 alone (per Nation Thailand, July 2026), creating direct supply pressure on the secondary market
- Investment models promising 8-10% annual returns typically rely on sub-leasing to short-stay guests - this structure is now under heightened regulatory scrutiny
- Based on our secondary-market observations, leasehold villas on Koh Samui currently sit on the market for 8-18 months, with typical discounts of 15-25% from the asking price
- Transfer (assignment) of a leasehold to a new buyer is legally possible but requires the landowner's consent and registration at the Land Office, with associated fees
Options and scenarios
How leasehold actually functions under Thai law
Thai law permits a foreigner to register a land lease for a maximum of 30 years in a single term. Registration at the Land Office is critical: an unregistered lease exceeding three years is unenforceable against third parties, including a new landowner. In practice, many developers market '30+30+30' structures, promising renewals totalling 90 years. The core problem is that any second or third 30-year term represents a contractual obligation between the original parties, not a real right recorded on the title deed. If the landowner sells the underlying land, the new owner is not bound by any renewal promise.
In our review of Thai court precedents, we find that courts have repeatedly declined to enforce automatic renewal clauses in leasehold agreements, treating them as non-binding future undertakings.
When leasehold is legal - and when it becomes a problem
A 30-year lease in itself is not illegal. Complications arise when:
- The foreign lessee exercises full owner-equivalent control over the land - developing it, sub-leasing it, managing it - in a way that is indistinguishable from outright ownership
- The agreement contains clauses giving the lessee the right to sell, mortgage, or transfer the land without meaningful landowner participation
- The leasehold is linked to a Thai company (Thai Co., Ltd.) in which Thai shareholders serve as nominees
- The sub-leasing model generates income on which taxes have not been paid or for which a hotel licence has not been obtained
Based on our analysis of the current enforcement activity, authorities are examining not only ownership structures but also cash flows: who actually collects the rent, who pays for maintenance, and where transfers originate.
Scenario 1: Leasehold villa - 5 to 10-year horizon
Consider a foreign buyer acquiring a 30-year leasehold on a villa on Koh Samui for 8 million THB (approximately 185,000 EUR at mid-2026 exchange rates). We model net short-term rental income at 6% per year after management costs.
Exit mathematics at 5 years:
- Cumulative net rental income (5 years x 480,000 THB): 2,400,000 THB
- Resale value of the leasehold (25 years remaining, 20% market discount applied): 6,400,000 THB
- Exit transaction costs - lease assignment registration fee (1% of declared value), agent commission (3-5%), withholding tax and stamp duty - totalling an estimated 450,000 THB
- Total proceeds: 6,400,000 + 2,400,000 - 450,000 = 8,350,000 THB
- Net result: +350,000 THB, equating to roughly 0.9% per year in real terms
At 10 years (20 years of lease remaining):
- Cumulative net rental income: 4,800,000 THB
- Resale value (20 years, 30-35% discount): 5,200,000 THB
- Exit costs: 380,000 THB
- Total: 5,200,000 + 4,800,000 - 380,000 = 9,620,000 THB
- Net result: +1,620,000 THB, equating to roughly 2.0% per year
The pattern is consistent across both scenarios: the value of the leasehold right decays every year. This is the fundamental structural difference from a freehold condominium, which can appreciate in line with the market. Rental income in a leasehold structure must compensate for both the cost of capital and the amortisation of the lease right itself.
Scenario 2: Freehold condominium - benchmark comparison
For a direct comparison, we model a foreign-quota freehold condominium in Kamala or Bang Tao, Phuket, acquired for 5 million THB. At 5% net annual rental yield and 10-15% cumulative capital appreciation over five years, the annualised real return comes to approximately 4-6% per year based on our estimates - substantially above the leasehold villa result, and at a lower legal risk profile.
Scenario 3: Off-plan contract assignment before handover
Some buyers acquire leasehold rights in the construction phase intending to assign the contract before completion. This route has its own constraints:
- Most Samui developers charge an assignment fee of 2-5% of the contract value
- Some agreements prohibit assignment during the first 12-24 months
- The assignment market is thin - a buyer must accept the same leasehold terms, which narrows the pool of interested parties considerably
Comparison table
| Parameter | Leasehold villa - Koh Samui | Leasehold villa - Phuket | Freehold condo - Phuket | Off-plan assignment - Koh Samui |
|---|---|---|---|---|
| Typical entry price | 6-12 million THB | 10-25 million THB | 3-8 million THB | 4-8 million THB |
| Secondary-market time on market | 8-18 months | 6-14 months | 3-8 months | 2-6 months |
| Discount from asking price | 15-25% | 10-20% | 5-12% | 5-15% |
| Legal risk (as of 2026) | High - active enforcement | Moderate | Low | Moderate |
| Assignment / transfer | Requires landowner consent | Requires landowner consent | Free resale | Subject to developer agreement |
| Lease amortisation | Yes - right erodes annually | Yes - right erodes annually | Not applicable | Not applicable |
| Estimated annual return (5-year model) | 0.5-2% | 1-3% | 4-6% | 3-8% (one-off gain) |
All figures are indicative, based on our observations as of the second half of 2026.
Risks and mistakes
Risk 1: Lease not registered at the Land Office. Our team has documented cases where a buyer paid for a leasehold but the agreement was never registered. An unregistered lease exceeding three years is unenforceable against a subsequent landowner. Land Office verification is non-negotiable before any funds transfer.
Risk 2: The '30+30+30' renewal promise. Thai law provides no automatic renewal mechanism. Even a contractually documented promise does not bind the landowner's heirs or successors. We have observed cases where, following the death of a Thai lessor, the family refused to honour the renewal clause and the courts provided no remedy.
Risk 3: Short-term rentals without a hotel licence. Rentals of fewer than 30 days require a licence under the Thai Hotel Act. A leasehold villa rented to tourists without this licence is exposed to administrative proceedings regardless of whether the leasehold itself is legally structured.
Risk 4: Currency exposure. A foreign investor carries two-way currency risk at both entry and exit. A 10% depreciation of the Thai baht against the investor's home currency over a five-year period eliminates a substantial share of what is already a modest leasehold return.
Risk 5: Secondary-market liquidity squeeze. With more than 800 new villas completed on Koh Samui in H1 2026, fresh primary-market inventory competes directly with resale stock. A secondary-market buyer can typically acquire a brand-new villa with a full 30-year lease, rather than taking over one with 20-25 years remaining.
Typical analytical error: comparing leasehold returns with freehold returns as if they were equivalent instruments. They are not. A leasehold is a wasting asset. The cash flow must cover not only the cost of capital but also the annual erosion of the lease right. Failing to model this amortisation consistently leads to overestimated returns.
FAQ
Is a 30-year leasehold in Thailand legal for foreign nationals?
Yes. Registration of a land lease of up to 30 years by a foreign national is permitted under the Thai Civil and Commercial Code. Legal problems arise when the leasehold structure is used to mask actual land ownership or is linked to a nominee company arrangement.
Can a leasehold be extended beyond 30 years?
Thai law provides no automatic renewal mechanism. '30+30+30' clauses are civil agreements between the original parties - they are not registered on the title deed and do not bind the landowner's successors or heirs.
How does leasehold assignment to a new buyer work?
Transferring leasehold rights requires the landowner's written consent and registration at the Land Office. The registration fee is 1% of the declared transaction value. Based on our observations, the full process takes two to six weeks when documentation is complete and the landowner is cooperative.
Do the 2026 Koh Samui enforcement actions affect all leaseholds?
No. Authorities are focused on structures where a leasehold is combined with nominee operations or where it functions as a vehicle for de facto foreign land control. A standard villa lease for personal use, properly registered and structured, is not inherently in violation of Thai law.
What is the typical time to sell a leasehold villa on the secondary market?
Based on our Koh Samui data for 2026, expect 8-18 months on market and discounts of 15-25% from the asking price. On Phuket, in districts such as Layan and Surin, liquidity is modestly better: 6-14 months and discounts of 10-20%.
Can I rent out a leasehold villa to tourists?
Yes, but short-term rentals (fewer than 30 days per stay) require a licence under the Thai Hotel Act. Operating without one exposes the lessee to administrative penalties, independently of the legal standing of the leasehold itself.
How is a leasehold assignment taxed for a foreign investor?
Thailand imposes withholding tax on the assignment of leasehold rights. The rate depends on the declared transaction value. Foreign investors should verify their home-country tax treaty position with Thailand - a double-taxation agreement may allow credit for Thai withholding tax against the investor's domestic tax liability, but the mechanics vary by jurisdiction.
Is leasehold on Phuket safer than on Koh Samui?
The 2026 enforcement campaign is concentrated on Koh Samui and Koh Phangan, but the underlying legal framework is identical across Thailand and the scope of enforcement could expand to Phuket. In our assessment, legal risk depends on the specific transaction structure, not on the island.
When does the secondary leasehold market favour sellers?
Liquidity is highest during the high tourist season (November through March), when foreign buyer activity peaks. A weaker Thai baht relative to USD or EUR also supports transaction volumes by lowering the effective price for incoming buyers. Based on our transaction data, activity falls by 30-40% during the monsoon season (May through October), making that an unfavourable window for vendors.
Our team monitors leasehold pricing on Phuket and Koh Samui continuously and reconciles asking prices against recorded transaction values each quarter. The central finding for any investor evaluating this structure: a leasehold villa can generate meaningful rental cash flow, but as an investment instrument it requires careful modelling that accounts for lease amortisation, exit costs, and the current regulatory environment. Given the combination of intensified enforcement and record new supply in 2026, we apply particular caution when reviewing sub-leasing structures and recommend thorough legal due diligence on every agreement before any commitment is made.
Researching property in Phuket or Koh Samui? Get in touch - our analysts will prepare a data brief for your shortlisted location.