Protecting Your Assets as a Long-Term Expat in Thailand

Thailand updated its will and inheritance framework in early 2026, and if you built your understanding of this topic before then, it’s worth a fresh look — the core inheritance rules didn’t change, but the procedural requirements for registering a will tightened meaningfully. Combined with a real, if narrow, inheritance tax and a hard rule about foreigners inheriting land, this is genuinely worth planning for deliberately rather than assuming it’ll sort itself out.

Here’s what actually applies.

What changed in 2026: the will registration reform

In January 2026, Thailand introduced a new Ministerial Regulation standardizing how wills are prepared and registered at district offices (Amphur) nationwide, effective March 24, 2026. This replaces rules dating back to 1960 and establishes a uniform administrative framework across the country. It doesn’t change the underlying inheritance rules in the Civil and Commercial Code, but it tightens procedural requirements for how a will actually gets registered — meaning the mechanics of getting a will properly on record shifted this year, even if the substance of Thai inheritance law didn’t.

What a valid Thai will actually requires

A valid Thai will must be written (typed or handwritten), dated, and signed by the testator in front of at least two witnesses, who must also sign in the testator’s presence. It doesn’t need notarization to be valid, though notarization adds credibility. It should be drafted in Thai, or bilingually in Thai and English, and covers assets located in Thailand specifically — the standard, consistent recommendation across Thai legal guidance is to maintain separate wills for each country where you hold assets, rather than relying on one document to cover everything.

Typical costs: a simple will for someone with few assets runs roughly 10,000-15,000 THB; a more complex will (multiple properties, company structures, children from different marriages) runs 20,000-50,000 THB. Probate legal fees separately run 30,000-100,000+ THB depending on estate complexity.

Land: foreigners who inherit it must sell it within one year

This is the detail most relevant to anyone who’s built or is considering a landed property structure covered in Can Foreigners Buy Property in Thailand. If a foreigner inherits land in Thailand — through a will or otherwise — they’re required to sell it within one year of inheriting, or transfer ownership to a Thai national. This is a hard rule, consistent with the broader restriction on foreign land ownership, and it’s a real planning consideration if your estate includes land you’re hoping to pass to a foreign heir.

Condominium units are the main exception. A condo within the foreign ownership quota can be inherited by a foreigner directly, without the forced-sale requirement that applies to land. This is one more reason condos tend to be the cleaner, lower-friction ownership structure for foreigners in Thailand generally, and it extends directly into estate planning.

Inheritance tax: real, but with a threshold most estates won’t hit

Thailand introduced inheritance tax under the Inheritance Tax Act B.E. 2558 (2015). The structure: a 100 million THB exemption threshold per deceased person, with only the portion above that amount taxed — 5% for ascendants or descendants (parents, children, grandchildren), 10% for all other heirs. For most expats, this simply doesn’t apply, since 100 million THB (roughly $2.7-3 million USD) is well above what most estates in this audience are working with. It’s worth knowing the number exists and knowing your specific estate size relative to it, rather than assuming it applies broadly to “expats in Thailand” as a category.

Who’s actually liable: the tax applies to Thai-located assets regardless of the heir’s or the deceased’s nationality, and it applies whether you’re formally domiciled in Thailand under immigration law or simply hold assets there as a non-resident. Assets located outside Thailand are governed by the laws of wherever they’re actually situated — a Bangkok condo and a US retirement account are handled under two completely separate legal frameworks, which is exactly why cross-border expats tend to need more than one will.

What actually protects you

• Draft a Thailand-specific will, registered under the current 2026 procedural framework, separate from any will covering assets elsewhere.
• Understand the one-year forced-sale rule if land is part of your estate. This isn’t a detail to discover after the fact — if a foreign heir is meant to inherit land, that plan needs restructuring now, likely toward a lease or corporate structure the heir can actually hold onto.
• Check your estate size against the 100 million THB threshold, so you know whether inheritance tax is a real planning consideration for you or a non-issue.
• Keep foreign and Thai wills consistent with each other. Overlapping coverage or contradictory clauses between separate wills is a documented, common source of delay and dispute during probate.

Where this gets specific to you

Whether your specific asset mix — property, business interests, bank accounts — needs a Thai will at all, how to structure inherited land so a foreign heir isn’t forced into a rushed one-year sale, and how your estate interacts across Thai and home-country jurisdictions depend entirely on what you actually hold and who you’re planning for.

Book a Relocation Strategy Call →

We’ll help you understand what’s genuinely at stake in your specific situation and what to bring to a Thai estate lawyer before it’s urgent.

Not ready for a 1:1 session yet? Grab the Philippines Arbitrage Playbook first — Thailand-specific resources are in progress.

---

References

• Siam Legal — Thailand Updates Its Will and Inheritance Laws: What You Need to Know (2026)
• Thai Law Online — Inheritance Law in Thailand: Complete Guide for Foreigners
• Expat Tax Thailand — Can Foreigners Inherit Land in Thailand? How to Avoid Issues
• Lawyers for Expats Thailand — Inheritance Tax in Thailand for Foreigners
• Silk Legal — Who Inherits What? Probates and Intestacy for Foreign Nationals in Thailand

Estate planning and inheritance law involve individualized legal detail this article cannot fully address, especially regarding the 2026 procedural reforms and cross-jurisdictional assets. Consult a licensed Thai estate lawyer before finalizing any will or asset-protection structure.