Wills and Estate Planning for Foreigners in Thailand

A foreign national who dies in Thailand owning a condo, a bank account, or a car, with only a will from their home country and no Thai will, doesn’t leave their heirs a simple inheritance. They leave them two separate court proceedings in two separate countries — because Thai courts don’t recognize and act on a foreign probate order directly. They require a new, independent probate case to be opened in Thailand, treating the foreign judgment as evidence to support the case rather than as a ruling to be enforced. For an estate that could have been settled in months, this routinely stretches the process into years.

Why a Foreign Will Isn’t Enough

Thai law does, in principle, recognize the validity of a will properly executed under the law of the place where it was made — a US or UK will, correctly executed there, isn’t automatically void in Thailand. But recognition in principle and a functioning transfer of Thai assets are two different things. To use a foreign will to transfer Thai property, heirs need the foreign will legalized, properly translated, and then taken through a Thai probate court to have a local estate administrator appointed — the Thai court does not simply approve a foreign court’s ruling. This process is genuinely burdensome: expensive, slow, and requiring coordination across two legal systems at exactly the moment a grieving family has the least capacity to manage that complexity.

A dedicated Thai will, covering only Thai-situated assets, sidesteps most of this. It still requires Thai probate — no will, foreign or Thai, avoids Thailand’s mandatory probate process — but it eliminates the cross-border translation, legalization, and dual-proceeding complexity that a foreign-will-only approach creates.

Recent Changes Worth Knowing

Effective 24 March 2026, Thailand introduced a new Ministerial Regulation modernizing how wills are prepared and registered at district offices, replacing rules that had been in place since 1960. This doesn’t change the underlying inheritance framework under the Civil and Commercial Code, but it meaningfully tightens procedural requirements — including stricter verification of the testator’s mental capacity and intent, specifically aimed at reducing coerced or contested wills, and removing the previous restriction limiting registration to the district where the testator’s name appears on official house registration. For anyone drafting or updating a Thai will now, these procedural changes are worth confirming with current guidance rather than relying on older descriptions of the process.

Do You Actually Need a Thai Will?

Not every foreigner with any connection to Thailand needs one, and the right answer scales with how substantial your Thai ties actually are:

• Minimal Thai assets, primary residence abroad — for a foreigner with no meaningful Thai-situated assets, a Thai will typically isn’t necessary; a home-country will suffices.
• A foreign-quota condo held as an investment, limited other Thai ties — this is a genuine gray area. In many cases, a properly legalized and translated foreign probate can transfer a condo without a full separate Thai probate proceeding, though this depends on the specific Land Office and condominium juristic person’s practice, which isn’t uniform nationwide.
• Spends significant time in Thailand annually with a condo, lease, or meaningful bank funds — a limited-scope Thai will covering Thai assets specifically is generally recommended, even though it still goes through Thai probate, because it substantially reduces the translation and legalization friction a foreign-will-only approach creates.
• Living or working in Thailand, meaningful assets, possible Thai family — a Thai will is generally recommended as the primary instrument for Thai assets, coordinated with any existing foreign will covering assets elsewhere.

What a Valid Thai Will Requires

Thai law recognizes several will formats, but one — the Ordinary Written Will under Section 1656 of the Civil and Commercial Code — is by far the most practical and commonly used by foreigners. To be valid, it must be:

• Written (typed or handwritten)
• Dated
• Signed by the testator in the presence of at least two witnesses
• Signed by both witnesses in the testator’s presence

Notarization isn’t strictly required for validity but adds evidentiary credibility, and the document should be in Thai or bilingual Thai-English rather than English-only, given that Thai courts and the Land Office will ultimately be working from the Thai text. The original should be kept somewhere secure, with copies held by both the executor and the drafting lawyer — a will that can’t be located when needed provides no more protection than not having one.

Inheritance Tax: Less Relevant Than Most Foreigners Assume

Thailand introduced inheritance tax in 2016 under the Inheritance Tax Act. The rate is 5% for ascendants and descendants and 10% for other heirs — but critically, there’s a 100 million THB exemption per beneficiary, meaning only the value exceeding that threshold is taxed. For the substantial majority of foreign retirees and expatriates, whose Thai estates sit well below this figure, inheritance tax simply doesn’t apply in practice. This is worth knowing precisely because the existence of an “inheritance tax” headline can cause unnecessary alarm among foreign asset holders whose actual Thai holdings are nowhere near the threshold where it becomes relevant.

Intestate Succession: What Happens Without a Will

If a foreign national dies in Thailand owning Thai assets without any will at all, Thai intestate succession rules apply automatically under a fixed statutory order of heirs (Sections 1629 and 1631 of the Civil and Commercial Code), with a spouse’s share determined separately under Section 1635. This statutory order may not reflect what the deceased would have actually wanted — Thai intestate rules don’t necessarily mirror the inheritance expectations of someone from a different legal tradition, and relying on them by default, rather than by informed choice, is one of the more consequential outcomes of not having a will at all.

Property-Specific Considerations for Foreign Heirs

Where the inherited asset is a condominium, a foreign heir needs to confirm the building’s foreign ownership quota hasn’t been exceeded — as covered in our property buying guide, Thai condominium law caps foreign ownership at 49% of a building’s total floor area. If a foreign heir inheriting a unit would push the building over that threshold, the unit may need to be transferred to a Thai entity or sold, rather than simply retained by the foreign heir in their own name. This is a real practical complication that estate planning ahead of time can anticipate, but that heirs dealing with an unplanned estate often discover only during the transfer process itself.

Outstanding Land and Building Tax on inherited property is also a live issue — the Land Office will not process a property transfer until any tax arrears are cleared, which means confirming the tax status of a Thai property is a necessary step before a transfer can proceed, not an afterthought.

Common Mistakes

Assuming a home-country will “covers” Thai assets adequately. It may be legally recognized, but recognition doesn’t equal an efficient transfer — the dual-proceeding burden falls entirely on your heirs.

Not notifying or securing consent from statutory heirs during probate. If statutory heirs aren’t properly notified and don’t consent to the administrator’s appointment, a Thai court may refuse the appointment, or a disgruntled heir may later contest the administrator’s authority — creating exactly the kind of dispute a will was meant to prevent.

Treating a Thai bank account as instantly accessible to a surviving spouse. Thai bank accounts are typically frozen upon notification of death, pending estate procedures — even for a spouse who was a co-user of the funds in practice.

Leaving a Thai will undrafted because the estate feels “too small to matter.” Given the modest cost of drafting a straightforward Thai will relative to the multi-jurisdictional probate burden it prevents, this is frequently a false economy.

How Harwell Legal Helps

We assess whether a Thai will is genuinely warranted given your specific asset picture, draft Section 1656-compliant wills for Thai assets, coordinate with existing foreign wills to avoid conflicts or gaps between jurisdictions, and represent estates and heirs through the Thai probate process — including situations involving inherited property that intersects with the condominium foreign-ownership quota.

Own property, hold a bank account, or have other assets in Thailand? [Contact Harwell Legal International] to assess whether a Thai will would meaningfully simplify things for your heirs — for most foreign asset holders in Thailand, the cost of finding out is small relative to the cost of not knowing.