30-Year Lease in Thailand: The Renewal Trap Explained

Getting the Judgment Right, and the Date Right

Anyone holding a 30-year lease in Thailand should start with the decision itself: Supreme Court Judgment No. 4655/2566. Almost every English-language summary describes it as a March 2025 ruling. That is wrong, and the error is easy to spot once you know the convention.

Thai judgments are numbered by the Buddhist-era year in which the court hands them down. B.E. 2566 corresponds to 2023. So this is a 2023 judgment that lawyers began publishing and analysing in early 2025. A specific date of 18 March 2025 also circulates widely. It cannot be right, because two law firms published detailed analyses of the judgment on 2 and 10 March 2025.

The distinction matters commercially. Owners who believe the law changed in 2025 tend to assume their older lease predates the problem. It does not.

What the Court Actually Decided

The facts came from Phuket. The parties signed a lease in May 1990 and registered it for 30 years, at a rent of THB 1.5 million. On the same day, they signed a separate promise to renew twice more for 30 years each, at THB 600,000 per term. The lessee paid the entire ninety years within days. When the first term expired in 2020, the lessor sued to evict.

The Provincial Court found for the lessee and ordered the lessor to register a further term. The Court of Appeal reversed. The Supreme Court upheld the reversal, and its reasoning splits into three parts that must be kept separate.

1. The initial 30-year registered lease is valid. The Court expressly upheld it. Nothing in this judgment threatens a properly registered first term.
2. The renewal promises are void. Not merely unenforceable, but void for unlawful object. They circumvented section 540 of the Civil and Commercial Code, which caps immovable property leases at 30 years.
3. The contractual argument failed too. The lessee argued that even if the promise could not create a registrable right over the land, it still bound the lessor personally as a matter of contract. The Court rejected that. Allowing it would defeat the purpose of section 540 entirely.

Because the renewal was void from the outset, the lessee’s continued occupation after May 2020 became a wrong, and full prepayment gave no defence. The Court awarded the lessor damages for the period of holding over.

Why These Particular Facts Mattered

The judgment is fact-sensitive, and reading it as a blanket ban overstates it. Three features drove the outcome, and they appeared together.

• Same-day execution. The parties signed the renewals alongside the head lease. That showed a settled intention, from the very beginning, to create a single ninety-year arrangement.
• Full prepayment. The lessee paid all ninety years within days, so nothing about the renewals resembled a genuine future decision.
• Identical terms with no rent adjustment. The renewal rent was not merely unchanged; it was lower. Section 540 exists precisely because property values move unpredictably over long horizons, and a structure that ignores this looks like avoidance.

Commentators disagree about how far the judgment reaches, and that disagreement is worth knowing. Some firms describe it as a departure from decades of prior holdings. Others argue it overturns nothing and merely applies the plain words of section 540. Both readings come from credible practitioners.

Note also that Thailand is a civil law jurisdiction. Supreme Court decisions are highly persuasive, but they are not binding precedent in the common law sense.

The Land Office Trap Behind Every 30-Year Lease in Thailand

Here is the point that catches sophisticated buyers. The Department of Lands will, under its own internal circular, register a second 30-year lease expressed to begin when the first expires. Buyers see the registration entry, see an official stamp, and conclude the structure has been blessed by the state.

It has not. Registration is an administrative act. It does not cure a defect in the underlying agreement. If the overall arrangement shows an intention to lease beyond 30 years from the outset, a court may still hold the second lease unenforceable, whatever the register shows.

A Separate Problem: Successors in Title

Keep two distinct risks apart, because the property portals routinely merge them. The first is the one this judgment addresses. A renewal promise may be void even against the original lessor who signed it.

The second is older and long settled. A renewal promise is a personal obligation of the person who gave it. It does not automatically bind someone who later buys the land. Under section 569 of the Civil and Commercial Code, a registered lease survives a change of owner, but a contractual promise to grant a future lease generally does not travel with the title.

So a villa holder can face either problem, or both. The original landowner may resist renewal and win. Alternatively the land may be sold, and the new owner may simply decline to be bound. Our note on real estate disputes before the Samui court covers how these cases run locally.

What a 30-Year Lease in Thailand Can Still Achieve

None of this makes leasehold worthless. It makes drafting decisive. Practitioners broadly agree on where the line now sits.

• The registered term remains solid. Register a 30-year lease in Thailand properly and it binds successors under section 569.
• Automatic, prepaid, identical-terms renewals are the exposed structure. The Court struck down precisely that combination.
• A renewal option may survive if it behaves like a real future transaction. That means no automatic operation, a genuine fresh act at expiry, a rent adjustment mechanism reflecting three decades of change, and rent paid at renewal rather than upfront.
• Prepaid renewal money creates its own claim. Where a renewal fails, unjust enrichment principles may allow the lessee to recover the sums paid for it. The practical value of that claim depends entirely on the lessor’s solvency.

Alternatives Worth Assessing

No structure replicates freehold, and any adviser who says otherwise is selling something. Several instruments nonetheless deserve consideration alongside a lease.

• Sap Ing Sith. This is a registrable right over immovable property under the Rights over Leasehold Assets Act B.E. 2562. It is transferable, mortgageable and inheritable, and it registers against the title, so it survives a change of owner. Our guide to Sap Ing Sith in Thailand explains the mechanics and the limits.
• Superficies and usufruct. Real rights that separate the building or the use of land from ownership of the land itself.
• Long leases for commerce and industry. The Lease of Immovable Property for Commerce and Industry Act B.E. 2542 allows terms of 50 years, renewable once, for qualifying commercial or industrial investment. It does not reach an ordinary residential villa.

On the frequently discussed 99-year proposal, one point should be stated plainly. It remains a draft. It has not been enacted, and no purchase should be structured on the assumption that it will be.

If You Already Hold One of These Structures

1. Read the actual documents. Establish when the parties registered the head lease, when they signed the renewal instruments, what changed hands and when, and whether any rent adjustment mechanism exists.
2. Check the register, then discount it. Confirm what is registered against the title, while remembering that registration does not validate.
3. Identify the current landowner. If the land has changed hands since the grant, the successor problem may matter more than the section 540 problem. Where the land sits in a company, our note on buying land through a Thai company is the next document to read.
4. Model the remaining term honestly. A villa with fourteen years left on a secure term is a very different asset from one marketed as having seventy-four.
5. Consider renegotiating early. A lessor with a solvent, cooperative relationship today is a better counterparty than one facing an eviction claim in a decade.

Frequently Asked Questions

Conclusion

A 30-year lease in Thailand does exactly what the statute allows, and it does it reliably once registered. The difficulty has always been the tail that sellers told buyers to rely on. Judgment 4655/2566 confirms that a pre-agreed, prepaid renewal on unchanged terms can be void even against the person who signed it, and that registration at the Land Office does not save it. On Samui and Phangan, where these structures underpin a large share of foreign-held villas, the sensible response is to read the documents now rather than discover the position in year twenty-nine.

Related reading: where the land sits in a company rather than under a lease, see buying a villa in Thailand through a company. For what may be built on an island parcel, see the Koh Samui building regulations.

This article provides general information on Thai law and does not constitute legal advice. Outcomes depend on the drafting, the registration history and the conduct of the parties in each case. Thailand is a civil law jurisdiction and Supreme Court decisions are persuasive rather than binding. Obtain advice on your own documents before acting. The Civil and Commercial Code is published by the Office of the Council of State, and land registration is administered by the Department of Lands.