Can Foreigners Buy Property in Koh Samui? The Complete Legal Guide (2026)

Posted by Group Samui Property on May 5, 2026

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Can Foreigners Buy Property in Koh Samui?

Disclaimer: This guide is for informational purposes only and does not constitute legal advice. Consult a qualified Thai property lawyer before making any purchase decisions.

Yes — foreign nationals can invest in Koh Samui property. They simply cannot own the land beneath it directly. That single distinction is the cornerstone of every legal structure available to international investors in Thailand, and understanding it before you commit capital is non-negotiable.

This guide breaks down every legitimate pathway to property ownership in Koh Samui, the legal framework that governs each one, the 2025 Supreme Court ruling that changed the game for villa leaseholders, and the current status of proposed reforms — including what has quietly been shelved. Whether you are evaluating a beachfront villa or a condominium in the hills, the information here will help you ask the right questions and avoid the structures that carry real legal risk in 2026.

For a deeper look at how these legal structures play out in practice, see our guide to Koh Samui Ownership Structures Explained and How to Buy Property in Koh Samui.

The Key Distinction: Property vs. Land

Thai law draws a firm line between owning a structure and owning the land beneath it. Foreigners can legally own buildings, villa structures, and condominium units — but under the Thai Land Code Act B.E. 2497 (1954), they are generally prohibited from holding a title deed to land itself. This prohibition is not a technicality — it is the foundational rule from which every ownership structure in this guide flows.

The practical result is that investors access Koh Samui real estate through four main legal structures: freehold condominium ownership, registered leasehold agreements, building ownership on leased land, and (in rare cases) direct land ownership via the Section 96 Bis investment route. Each structure carries different levels of security, cost, and complexity.

The Legal Framework: Three Statutes Every Investor Must Know

The Land Code Act B.E. 2497 (1954)

The Land Code is the bedrock of Thai property law. Section 86 explicitly prohibits foreign individuals from owning land in Thailand, with only narrow statutory exceptions. A “foreign” entity is defined as any person or juristic body where foreigners hold more than 49% of shares, hold a majority of shareholder positions, or exercise effective control. The penalties for contravention include fines and imprisonment under Section 111.

The Foreign Business Act B.E. 2542 (1999)

The Foreign Business Act (FBA) governs which sectors of the Thai economy are restricted for foreign participation. Crucially for property investors, land trading sits in List 1 — activities completely prohibited for foreigners. The FBA also explicitly criminalises nominee shareholder arrangements: Thai nationals holding shares in name only, on behalf of a foreign beneficial owner, are committing an offence under Section 36 of the Act. Penalties for both the foreign investor and the Thai nominee include imprisonment of up to three years, fines of up to one million baht, forced business closure, and deportation.

The Condominium Act B.E. 2522 (1979, amended 2008)

The Condominium Act creates the only pathway for a foreigner to hold a Thai freehold title deed in their own name for real property. Under Section 19 of the Act, foreign nationals may own condominium units outright, subject to one quantitative restriction: the total foreign-owned floor area in any single building may not exceed 49% of the building’s total saleable area. This is calculated by floor space, not by number of units, and is verified at the time of ownership registration at the Land Department.

Ownership Options for Foreign Investors

Option 1: Freehold Condominium Ownership — The Safest and Most Straightforward Route

A condominium unit purchased within the 49% foreign quota gives an investor true freehold ownership — the title deed (Chanote / Nor Sor 4 Jor) is registered in the investor’s name at the Land Department with no expiry date. The investor can sell, lease, mortgage, bequeath, or inherit the unit subject to applicable laws and quota availability.

Key requirements for foreign freehold condo registration:

The purchase funds must be remitted from outside Thailand in foreign currency.
The receiving Thai bank issues a Foreign Exchange Transaction Form (FETF) — formerly known as the Thor Tor 3 form — as proof of the international transfer and currency conversion. This document is mandatory for Land Department registration and must show the transferred amount in foreign currency and Thai baht, the sender’s name, the recipient’s name, and the stated purpose of the transfer (e.g., “purchase of condominium unit X”).
The buyer must confirm the building’s foreign quota has not been reached before signing a reservation agreement.

For investors seeking a legally clean, relatively straightforward entry into Koh Samui real estate, a freehold condominium within the 49% quota is the benchmark against which all other structures should be measured. SPG’s curated portfolio spans villas, condos, and land across every key Koh Samui neighbourhood, and quota availability is verified prior to introduction.

Investor note: As of 2026, proposals to raise the foreign freehold quota in condominiums beyond 49% remain at the discussion stage and have not been enacted into law. Current legal limits remain firmly at 49%.

Option 2: Registered Leasehold (30-Year Lease) — The Most Common Structure for Villas

Leasehold is the primary mechanism through which foreigners invest in Koh Samui villas, houses, and landed properties. Section 540 of the Thai Civil and Commercial Code (CCC) permits leases of immovable property for a maximum of 30 years. For a leasehold to be enforceable beyond three years, Section 538 of the CCC requires the lease to be registered at the Land Department.

A registered 30-year lease is a genuine property right — it binds the land itself, meaning the right survives even if the landowner sells to a third party. It can be transferred, sub-leased, and in many cases inherited, depending on the lease terms.

Before signing any leasehold contract, review our guide to Thai Property Contracts Explained — it covers what to look for in a well-structured lease agreement.

The 2025 Supreme Court Ruling: What Changed for 30+30+30 Leases

For years, developers and lawyers marketed “30+30+30” lease structures to foreign villa buyers — a 30-year registered lease with contractual clauses promising two additional 30-year renewals, for a total of 90 years. On March 18, 2025, the Thai Supreme Court issued a landmark ruling in Case No. 4655/2566 that ended this practice decisively.

The case arose from a 1990 lease over a property in Phuket, where the lessor sought to evict the lessee after 30 years, arguing the renewal clauses were void. The Supreme Court upheld the Court of Appeal’s eviction order, ruling that:

Pre-agreed automatic renewal clauses are void and unenforceable. Any contractual arrangement structured to provide more than 30 years of tenure from inception — whether through simultaneous execution of a lease and renewal agreement, advance payment for future terms, or other mechanisms — constitutes an impermissible circumvention of Section 540 of the CCC.
Only the first 30 years is a guaranteed property right. This is the period registered at the Land Department. It is secure and binding on all parties, including future landowners.
Renewal promises are merely personal contractual obligations. A clause promising a future renewal cannot be registered at the Land Department. It creates only a personal obligation between the current parties — not a registered property right. If the landowner dies or sells the property, their heirs and successors are generally not bound by the renewal promise.

As analysed by Formichella & Sritawat, the ruling does not void existing first-term leases. If an investor is currently within their initial 30-year registered term, that right is fully protected. What is now exposed as legally hollow is any reliance on pre-agreed extensions beyond year 30.

What this means for investors considering a villa purchase: A Koh Samui villa offered on a “30+30+30” leasehold should be evaluated as a 30-year investment at the legal level. Future renewals depend entirely on the goodwill of the landowner — or their heirs — at year 30. Well-structured modern lease agreements can include option-to-renew clauses with market-adjusted rental terms (rather than fixed pre-agreed amounts) that carry a stronger chance of enforceability, but no pre-agreed automatic renewal can be guaranteed under current law.

Option 3: Thai Limited Company — Permissible but Tightly Regulated

A Thai limited company with majority Thai shareholding (at least 51% of shares held by Thai nationals) can legally own land. Some foreign investors use this structure to hold property in Koh Samui.

To be legally compliant, the company must:

Be a genuinely operating business entity with legitimate Thai shareholders who have actually invested capital and exercise real decision-making authority.
Have a stated business purpose beyond simply holding real estate.
Maintain proper accounting, annual general meetings, and corporate filings.

The nominee crackdown — a critical risk for 2025–2026:

The Department of Business Development (DBD), working in coordination with 17 government agencies, has placed over 21,000 companies under investigation for suspected nominee arrangements. Authorities at the DBD are now issuing formal compliance notices to shareholders and directors, demanding documentary proof of genuine investment and decision-making involvement. Enforcement actions have specifically targeted villa schemes in Koh Samui and Koh Phangan.

The classic nominee model — a Thai national holding 51% on paper with no real financial stake, while the foreign investor exercises full control — is now described by Thai legal practitioners as “effectively dead”. The consequences for both the foreign investor and the Thai nominee include:

Criminal prosecution under Section 36 of the FBA
Fines of up to one million baht per day
Imprisonment of up to three years
Forced disposal of the property within 180 days to one year
Deportation and permanent blacklisting from future business activities in Thailand

A genuine Thai company structure with legitimate shareholders can still be a valid pathway — but it requires proper legal structuring, ongoing compliance, and independent legal advice from a qualified Thai property lawyer.

Option 4: Building Ownership on Leased Land (Superficies)

Thai law allows ownership of a structure to be legally separated from ownership of the underlying land. Under Sections 1410–1416 of the Thai Civil and Commercial Code, a foreigner can hold a superficies right — full legal ownership of a villa or building constructed on land that is leased from a Thai landowner or company.

This structure is commonly combined with a registered 30-year lease:

The lease agreement grants the foreigner the right to use the land for 30 years.
The superficies agreement legally confirms the foreigner as the owner of any building constructed on that land.
Both documents are registered at the Land Department.

Superficies provides particularly strong protection for investors who are constructing or purchasing a high-value villa: it allows the building to be sold, transferred, or mortgaged independently from the land, and gives clear legal standing as the building’s owner. The underlying limitation remains — the security of the investment is contingent on the 30-year land lease, subject to the renewal caveats discussed above.

Option 5: Section 96 Bis — Direct Land Ownership via Investment (Rare)

Section 96 Bis of the Land Code is the only legal provision allowing a foreign individual to own land in Thailand in their own name. The threshold is high:

Minimum investment: THB 40 million (~USD 1.1 million) in qualifying Thai assets — including government bonds, Bank of Thailand bonds, property mutual funds, or equity in BOI-promoted companies.
Investment must be maintained for at least 5 years after land ownership approval is granted.
Maximum land area: 1 rai (1,600 square metres).
Use restriction: Residential purposes only. No commercial use, development for sale, or rental operations.
Location restriction: Land must be in a designated urban zone. Most approvals have historically been concentrated in Bangkok and major cities; applications for island locations such as Koh Samui face additional scrutiny.
Approval process: Discretionary — approval requires the Minister of Interior’s sign-off with Cabinet endorsement. Meeting the criteria does not guarantee approval. Typical processing timelines run 12–24 months.
Not transferable by inheritance: The ownership right is extinguished upon the death of the approved individual.

For most international investors in Koh Samui, Section 96 Bis is of theoretical rather than practical interest. The combination of the high capital commitment, discretionary approval, residential-only restriction, five-year lock-up, and location limitations makes it unattractive compared to leasehold or condominium alternatives. It warrants consideration only for high-net-worth individuals already allocating capital into Thai-approved investment instruments and seeking a very specific residential footprint.

The 99-Year Leasehold Proposal: What Investors Need to Know

Throughout 2025, Thailand’s government actively promoted a proposal to amend the Rights Over Leasehold Asset Act B.E. 2562 (2019) — extending the maximum lease term from 30 years to 99 years for non-agricultural land. The proposal was framed as an economic stimulus measure, designed to attract long-term foreign investment and high-net-worth residents while keeping land ownership firmly in Thai (or state) hands after the term expires.

In July 2025, the government fast-tracked the bill, and Deputy Transport Minister Manaporn Charoensri stated the aim was parliamentary approval and enactment by end of 2025.

The current status: the proposal has been shelved.

In September 2025, The Nation Thailand reported that the new Thai government had formally set the 99-year leasehold aside. Government spokesperson Siripong confirmed: “This government has a limited mandate, and we will not push legislation still under study, as there is insufficient time. The proposal has also sparked debate among MPs and society, so it will not be pursued further.” By February 2026, multiple legal and property industry sources confirmed the reform was no longer on the legislative agenda.

What this means for investors in 2026:

The maximum enforceable lease term remains 30 years.
No developer, agent, or lawyer can legally guarantee a 99-year lease today.
Any project marketing a 99-year leasehold is marketing a commitment that has no legal basis under current Thai law.
The 30-year registered lease remains the standard — and when properly structured, it provides genuine, enforceable property rights for the duration of that term.

The property industry continues to lobby for reform, and the issue may return to the legislative agenda under a future government. Investors should monitor developments — but should make purchase decisions based on the law as it stands, not on proposals that have not been enacted.

The Practical Buying Process: From Search to Chanote

A typical Koh Samui property transaction for a foreign investor proceeds through the following stages. For a comprehensive step-by-step walkthrough, see How to Buy Property in Koh Samui.

1. Property Search and Due Diligence

Identify investment-grade properties through a reputable agency with transparent disclosure on title type, lease term, quota availability (for condominiums), and existing encumbrances. Commission an independent title search at the Land Department before proceeding. See also our Koh Samui Due Diligence Checklist for a structured overview of what to verify.

2. Retain a Qualified Thai Property Lawyer

Independent legal counsel — instructed by and reporting to you, not the developer or seller — is essential. Your lawyer should verify the title deed, confirm the ownership structure is legally sound, review all contracts in both Thai and English, and advise on tax implications. Understanding what you are signing is equally important: our guide to Thai Property Contracts Explained covers the key clauses every buyer should scrutinise.

3. Reservation Agreement and Deposit

A reservation agreement locks the property for a defined period while due diligence is completed. Deposits are typically non-refundable if the buyer withdraws without legal cause.

4. International Fund Transfer and FETF

For condominium purchases, the full purchase price must be transferred from outside Thailand in foreign currency. The receiving Thai bank will issue a Foreign Exchange Transaction Form (FETF) — previously known as the Thor Tor 3 form. The FETF must accurately state the transaction purpose (“purchase of condominium unit X”) and your name as the sender. This document is mandatory for Land Department registration and must be retained permanently for future resale and repatriation of proceeds.

5. Sale and Purchase Agreement

The formal contract is executed after due diligence is satisfactory. For off-plan purchases, stage payments are common. Your lawyer should review payment terms, developer completion obligations, and dispute resolution provisions.

6. Transfer at the Land Department

Title transfer is completed in person at the Land Department. Standard costs at transfer include:
– Transfer fee: 2% of the assessed value
– Withholding tax: 1% of assessed or sale value (whichever is higher) for individuals
– Specific Business Tax (SBT): 3.3% if the seller has held the property for fewer than 5 years
– Stamp duty: 0.5% (applied instead of SBT if SBT does not apply)

Responsibility for these costs is negotiated between parties — confirm the split contractually. For a full breakdown of purchase-related costs, see The True Cost of Buying a Villa in Koh Samui.

Key Documents: What Every Foreign Investor Should Understand

Title Deeds

Not all Thai title documents confer the same rights. The hierarchy from strongest to weakest:

Title Type	Thai Name	What It Means
Chanote	Nor Sor 4 Jor (NS4J)	Full freehold ownership; GPS-surveyed boundaries; strongest title available. Required for premium investment-grade property.
Nor Sor 3 Gor	NS3G	Accurately surveyed; can be transacted freely; upgradeable to Chanote. Acceptable for leasehold registration.
Nor Sor 3	NS3	Possession right only; boundaries unconfirmed; requires 30-day public notice before sale. Higher dispute risk.
Sor Kor 1	SK1	Land use right only; no ownership. Not suitable for investment.

International investors should only proceed on Chanote title, or at a minimum Nor Sor 3 Gor for leasehold transactions, after legal advice.

Foreign Exchange Transaction Form (FETF)

Mandatory for condominium freehold registration. Proves funds originated from outside Thailand. Also required when repatriating sale proceeds upon eventual disposal of the property. Keep all FETF documentation permanently.

Registered Lease Agreement

A lease agreement covering more than three years must be registered at the Land Department to create an enforceable property right. An unregistered lease creates only a personal contractual right — enforceable between the original parties but not binding on a future landowner.

Superficies Agreement

If purchasing a villa structure on leased land, a superficies agreement registered at the Land Department confirms the investor’s ownership of the building independent of the land. This should be executed simultaneously with the lease registration.

Common Pitfalls for Foreign Investors

1. Nominee Company Structures

As detailed above, using Thai nationals as nominee shareholders to circumvent the 51% Thai ownership requirement is illegal under the FBA, actively investigated by 17 government agencies, and carries criminal penalties for all parties. The enforcement environment in Koh Samui specifically has intensified materially since 2024. This is not a risk worth taking.

2. Unregistered Leases

A lease agreement not registered at the Land Department is enforceable only as a personal contract between the original parties. If the landowner sells, dies, or is subject to legal proceedings (foreclosure, bankruptcy), an unregistered lessee has no enforceable right against the new owner. Always verify the lease registration stamp from the Land Department before transferring funds.

3. Over-Reliance on “30+30+30” or “99-Year” Marketing

In light of Supreme Court Case No. 4655/2566 and the shelving of the 99-year leasehold reform, any marketing of villa properties on a guaranteed 90-year or 99-year leasehold basis should be treated as a red flag. Base investment decisions on the 30-year registered lease as the enforceable tenure.

4. Weak or Inferior Title Deeds

Purchasing on Nor Sor 3 or lower-grade documents introduces boundary uncertainty and dispute risk. Chanote title is the standard for investment-grade property in Koh Samui. Verify the title type independently at the Land Department — do not rely solely on documents provided by the seller or developer.

5. Skipping Independent Legal Counsel

Developers and selling agents in Koh Samui often recommend in-house or affiliated lawyers. This creates a conflict of interest. Retain a lawyer of your own choosing, instruct them independently, and ensure they review all documentation before you commit capital.

6. Purchasing When Condominium Foreign Quota Is Full

If a building’s 49% foreign quota is exhausted, the transaction cannot be registered as foreign freehold — only a leasehold arrangement would be available. Confirm quota availability with the Land Department, not with the developer’s sales team.

FAQ: Foreigners Buying Property in Koh Samui

Can a foreigner own property outright in Koh Samui?

Yes — but only a condominium unit within the foreign quota, not land. Under the Condominium Act, foreigners can own up to 49% of the total saleable floor area in a condominium building on a freehold basis, with the title deed registered in their own name. Villas and houses on land are accessible through leasehold or building ownership structures, but freehold ownership of the land itself is not available to foreign individuals except through the narrow and rarely-approved Section 96 Bis investment route.

What is the safest way for a foreigner to buy property in Koh Samui?

A freehold condominium unit within the 49% foreign quota is the legally cleanest structure available. The investor receives a title deed in their own name with no expiry date. For villa investments, a properly structured 30-year registered lease combined with a superficies agreement (confirming ownership of the building) provides enforceable tenure and clear asset ownership — but investors must enter the transaction understanding that the 30-year term is the legally guaranteed period.

Is leasing property for 90 or 99 years still possible?

No. Supreme Court Case No. 4655/2566 (March 2025) confirmed that pre-agreed automatic renewal clauses designed to create cumulative lease terms beyond 30 years are void and unenforceable. The maximum legally guaranteed lease term is 30 years. The proposed 99-year leasehold reform was also formally shelved by the Thai government in September 2025. (The Nation Thailand)

What is the 49% foreign quota in Thai condominiums?

Under Section 19 of the Condominium Act, the total floor area owned by foreign nationals in any single condominium building cannot exceed 49% of the building’s total saleable area. This is calculated by floor space, not by number of units. Once the 49% threshold is reached, no further foreign freehold sales are permitted in that building — remaining units can only be sold to Thai nationals or on a leasehold basis to foreigners.

Do I need to transfer money from overseas to buy a condo in Thailand?

Yes. For a foreign freehold condominium purchase, the purchase funds must originate from outside Thailand and be remitted in foreign currency. The receiving Thai bank will issue a Foreign Exchange Transaction Form (FETF) confirming the transfer. This document is mandatory for Land Department registration of foreign ownership. Retain it permanently — you will need it again when repatriating sale proceeds in the future.

Can I use a Thai company to buy land in Koh Samui?

A genuine Thai limited company with real majority Thai shareholders can legally own land. However, a company formed primarily or solely to hold real estate, with Thai nationals acting as nominees rather than genuine investors, violates the Foreign Business Act and the Land Code. The Thai government has placed over 21,000 companies under investigation for suspected nominee activity, with enforcement specifically targeting villa schemes in Koh Samui. The consequences include criminal prosecution, forced property disposal, deportation, and blacklisting.

What title deed should I look for when buying in Koh Samui?

Chanote (Nor Sor 4 Jor) is the gold standard — it provides full ownership rights and GPS-precise boundaries, registered in the national land survey. For investment-grade property, only Chanote or Nor Sor 3 Gor (accurately surveyed, freely transactable) title should be considered. Weaker title documents carry boundary uncertainty and dispute risk that is disproportionate to the cost savings.

What happens after I complete the purchase?

Once your property is registered, effective management is key to protecting and growing your investment — whether you plan to rent the property out, use it seasonally, or hold it long term. Our Koh Samui Property Management Guide covers the operational considerations every owner should understand.

Working with Samui Property Group

Navigating Thai property law as a foreign investor requires more than enthusiasm — it requires accurate, current information and a team that places compliance and transparency ahead of transaction volume. Samui Property Group provides transparent, data-driven guidance for international investors.

Contact Samui Property Group to discuss your investment goals.

Last updated: March 2026. This guide reflects laws and judicial precedents as of the publication date. Thai property law is subject to change. Sources cited were verified at time of writing.

Sources

Thailand Land Code Act B.E. 2497 (1954) — Land Ownership Rules — Siam Legal International
Thailand Condominium Act — 49% Foreign Quota — Siam Legal International
Foreign Business Act B.E. 2542 (1999) — Benoit & Partners Law Firm
Foreign Land Ownership — Land Code — Benoit & Partners
Thai Supreme Court Case No. 4655/2566 — Lease Ruling — Formichella & Sritawat (FOSR Law)
30-Year Lease Ruling — Siam Legal International
99-Year Leasehold Proposal — The Nation Thailand (July 2025)
99-Year Leasehold Shelved — The Nation Thailand (September 2025)
Section 96 Bis — Land Code Investment Route — Siam Legal International
FETF / Foreign Exchange Transaction Form — Thailand Law Online
Thai Title Deeds — Chanote — Siam Legal International
Thai Title Deed Types — Thailand Law Online
Nominee Company Investigation (21,000+ firms) — The Nation Thailand
Nominee Shareholding — Siam Legal International