Your Will, Your Thai Assets: A Guide for Foreigners Married to Thai Nationals

Focus keyword: foreign will Thailand

You married a Thai national, built a life together, and perhaps bought a condo, opened a bank account, or invested in a business. But have you thought about what happens to those Thai assets when you're gone?

Many foreign spouses assume that a will made back home will cover everything. Others haven't made a will at all, trusting that their Thai spouse will automatically inherit. In reality, both situations can create serious legal complications for your family. This guide explains how foreign wills work in Thailand, what the law actually says, and the clearest path to protecting your loved ones.

Does Your Foreign Will Actually Work in Thailand?

The short answer is: it can — but it comes with significant practical obstacles.

Under Sections 39 and 40 of Thailand's Act on Conflict of Laws B.E. 2481, your capacity to make a will is governed by the law of your nationality, and a will is formally valid if it complies with either the law of the country where it was made or your national law. In other words, Thailand does not automatically reject a will just because it was drafted abroad. Thai Supreme Court Judgment No. 6524/2561 has confirmed that a foreign will valid in its originating jurisdiction can be recognized in Thailand.

However, recognition and enforcement are two different things.

For your Thai immovable property — such as a condominium unit registered in your name — Section 37 of the Conflict of Laws Act requires that Thai law governs the succession. Your Thai assets will generally require Thai court proceedings, usually for the appointment of an estate administrator, before banks, the Land Office, or companies will allow the assets to be transferred.

For movable assets such as Thai bank accounts or shares in a Thai company, Section 38 provides that succession follows the law of the deceased's domicile at the time of death. If you were domiciled in Thailand, Thai law will likely apply to these assets as well.

What this means in practice: even a perfectly valid foreign will must still go through the Thai court system before your family can access your Thai assets. And that process is far from simple.

The Reality of Using a Foreign Will for Thai Assets

If your family tries to rely on your foreign will in Thai proceedings, here is what they will face.

The will must be fully translated into Thai and authenticated, typically through the Ministry of Foreign Affairs or a Thai embassy, depending on the document's origin. It is then presented to a Thai court, which will review whether it complies with the applicable law before appointing an estate administrator.

During the entire process, your Thai bank accounts are frozen. Your condo cannot be sold or transferred. Your spouse, no matter how clearly named in your foreign will, cannot simply walk in and claim the assets.

This process can take months. In contested cases or where documents are incomplete, it can take considerably longer.

What Happens If You Have No Will at All?

If you die without any valid will covering your Thai assets, your estate is distributed under the intestacy rules in Section 1629 of the Thai Civil and Commercial Code, which sets out six classes of statutory heirs in strict priority order: descendants, parents, siblings of full blood, siblings of half blood, grandparents, and uncles and aunts.

Your legally registered spouse is also a statutory heir, but the share they receive is determined under Section 1635 and depends on which other statutory heirs survive you. If you have children from a previous relationship, for example, your Thai spouse may receive considerably less than you intended.

More critically, dying without a will means your family must petition a Thai court to appoint an estate administrator before anything can be done with your assets. Every step requires documents, translations, court appearances, and time, at a moment when your family is already grieving.

The Practical Solution: A Thai Will for Your Thai Assets

The most effective approach for a foreigner married to a Thai national with assets in Thailand is to have two coordinated wills: one governing your assets abroad, and a separate Thai will covering your Thai assets specifically.

A Thai will avoids the need to rely on a foreign will as the primary document in Thai proceedings. Although a court appointment of an estate administrator may still be required, the Thai will usually makes the process clearer and faster for your family.

For a Thai will to be valid under Section 1656 of the Civil and Commercial Code, it must be:

• Made in writing
• Dated at the time of making
• Signed by you in the presence of at least two witnesses who are present at the same time and sign to certify your signature

There is no requirement to notarize a private Thai will. Alternatively, a testator may make a public-document will before the competent district officer under Section 1658, which can provide an additional layer of formality and evidentiary certainty.

One critical point on witnesses: The witnesses should not be beneficiaries under the will. Under Section 1653, the writer of the will or a witness cannot be a legatee, and the same restriction applies to the spouse of such writer or witness. This is a common mistake that can invalidate specific bequests or, in some circumstances, affect the entire document.

Key Assets to Address in Your Thai Will

Condominium unit: A foreign heir may inherit a condominium unit only if the heir qualifies for foreign ownership under the Condominium Act and the foreign ownership quota in the building (49% of total unit space) is not exceeded. If the heir does not qualify, or the quota prevents registration, the unit may need to be disposed of within one year. It is advisable to name a clear beneficiary, consider this scenario in your will, and specify what should happen to the proceeds if a sale becomes necessary.

Thai bank accounts: In practice, Thai banks usually require a court order appointing an estate administrator before releasing funds from a deceased person's account. A Thai will naming a clear executor helps establish authority and speeds up this step, but it does not eliminate the need for court involvement entirely.

Company shares and business interests: Shares in a Thai company are movable property. The governing law depends on your domicile at the time of death, but having a Thai will that expressly covers these assets avoids uncertainty about which documents Thai authorities will accept as proof of authority to act on behalf of the estate.

One Important Caution: Don't Let Your Two Wills Conflict

If you have both a foreign will and a Thai will, the documents must be carefully coordinated. Under Thai law, a later will may revoke an earlier one if not properly drafted. 

Poorly coordinated dual wills can create exactly the kind of dispute you were trying to prevent. This is not a task to approach with a generic template.

Frequently Asked Questions

Can my Thai spouse automatically inherit my Thai assets without a will?
Your legally registered spouse is a statutory heir. However, the spouse's share is determined under Section 1635 and depends on which other statutory heirs survive you, including children or parents of the deceased. Without a will, the process also requires a court-appointed administrator before any assets can be transferred.

Is my foreign will valid in Thailand?
Under Sections 39 and 40 of the Act on Conflict of Laws, a foreign will that complies with either your national law or the law of the country where it was made is formally valid. Thai courts may recognize it, as affirmed in Supreme Court Judgment No. 6524/2561. However, it must still go through Thai court proceedings before your assets can be transferred, and Thai law governs the succession of your Thai-situated immovable property regardless.

Does my Thai will need to be in Thai language?
Not strictly. A Thai will can be made in another language if the legal formalities are met. However, for Thai court proceedings, a Thai version or a Thai translation certified for filing purposes will normally be needed. Having the will drafted bilingually from the outset avoids delays later.

Can a foreigner make a will in Thailand without a Thai visa or residency?
Yes. There is no requirement for Thai nationality, residency status, or a Thai house registration book. Any person of legal capacity may make a valid will in Thailand covering Thai-situated assets.

What happens to my condo if my foreign heir cannot meet the ownership requirements?
Under the Condominium Act, if the foreign heir does not qualify for foreign ownership or the 49% quota in the building is already met, the heir must sell or dispose of the unit within one year. It is advisable to plan for this in your will by specifying what should happen to the proceeds in that scenario.

How WPK Can Help

At WPK Notary & Translation Services, we assist foreign nationals and their Thai spouses in preparing Thai wills that are clear, legally sound, and properly coordinated with any existing foreign testamentary documents. Our services include:

• Drafting a Thai Last Will and Testament in both English and Thai
• Advising on how to structure dual wills to avoid conflicts
• Certified Thai–English translation for court filing purposes
• Notarial certification of documents for use in Thai legal proceedings

Don't leave your Thai assets, or your spouse, unprotected. Reach out for a consultation today.

Contact us:
📧 Email: wpk.notary@gmail.com
📍 Facebook: WPK Notary
📲 Line: @519clses