Prenuptial Agreements in Thailand.

Overview

The Most Time-Sensitive Document in Thai Family Law

Prenuptial agreements are among the most time-sensitive matters we handle. The deadline is fixed, the agreement must be signed and attached to the marriage registration before the wedding takes place. Miss that window and there is no legal remedy under Thai law. We have turned around agreements in under two weeks when clients came to us at short notice, but the earlier you start the process, the more comprehensive the protection we can put in place.

Thai prenuptial agreements are recognised under the Civil and Commercial Code. They govern the separation of personal property and marital property in the event of divorce or death. When properly drafted by an experienced barrister and correctly registered, they give both parties clarity and legal protection from the first day of marriage. When poorly drafted, or attached to the wrong document at the wrong office, they are unenforceable, and we regularly see both.

Section 1

Why the Default Rules Matter

Without a prenuptial agreement, Thai marriage law applies in full. All property acquired during the marriage becomes sin somros, jointly owned equally by both spouses, regardless of who earned it or whose name appears on the title. This is not a minor technicality. We advise clients who discover, mid-divorce, that a property they believed was solely theirs is classified as jointly owned because it was purchased after the marriage date, even from pre-marital savings.

Property owned before marriage, gifts and inheritance received during marriage by one spouse are technically personal property under Thai law. But when those assets are deposited into a joint account, used to buy jointly registered property or mixed with marital income over time, proving what was personal becomes complex and contested. A properly drafted prenup removes that uncertainty entirely.

• All assets acquired during marriage are equally owned by both spouses by default.
• Pre-marital assets are personal property, but must be clearly documented to remain so.
• Gifts and inheritance to one spouse during marriage are personal property.
• Assets commingled with marital funds are difficult to separate without clear prior documentation.
• On divorce, jointly owned property is divided equally unless a court orders otherwise.

Section 2

What We Can Protect in a Thai Prenup

We draft prenuptial agreements that address the full picture of what our clients bring into a marriage and what they expect to acquire during it. That typically includes Thai and overseas property, business shareholdings, existing bank accounts and investment portfolios, anticipated inheritance and any specific financial arrangements the couple wants to govern during the marriage.

• Pre-marital property and assets confirmed as personal property of each spouse.
• Overseas property and foreign assets addressed within the agreement.
• Business interests and shareholdings protected from marital property classification.
• Inheritance rights and estate planning provisions incorporated.
• Financial arrangements during the marriage documented clearly.
• Asset division terms agreed in advance rather than contested in divorce proceedings.

Section 3

What Courts Will and Will Not Enforce

Thai courts scrutinise prenuptial agreements carefully. Provisions that conflict with public policy or the mandatory rules of the Civil and Commercial Code will not be upheld. We draft to the enforceability standard, which means our agreements do not include the kinds of clauses that get struck down. We have seen agreements drafted elsewhere that contained penalty clauses for adultery, child support waivers and provisions that attempted to override mandatory inheritance rights. None of those survived court challenge.

What courts will enforce: clear property separation provisions, agreed asset division terms, overseas property arrangements and financial management clauses. What they will not: provisions that penalise personal conduct, attempt to waive child support obligations or were obtained under any form of duress. We ensure your agreement stays firmly within enforceable territory.

Section 4

Registration, Where Most Problems Arise

The registration requirement is where we see the most errors, often in agreements not prepared by Thai lawyers. The agreement must be attached to the marriage registration at the District Office on the day the marriage is registered. It must be in Thai, or accompanied by a certified Thai translation prepared to the court standard. Both parties must sign it in the presence of at least two witnesses. An agreement that is not properly attached on the registration day has no legal validity, regardless of how well it is drafted.

We handle the coordination with the District Office, attend on the day of registration where required, and ensure that the attachment is completed correctly. We have done this for couples throughout Thailand, including at registrations in Phuket, Chiang Mai, Pattaya and Bangkok.

Section 5

How We Draft and Register Your Prenuptial Agreement

Our process begins with a consultation at which both parties disclose their assets and confirm what they want the agreement to achieve. We document everything, draft in Thai and English, and review every clause with both parties before anything is signed. We do not rush this process, both people need to understand exactly what they are agreeing to.

• Full asset disclosure process for both parties before drafting begins.
• Agreement drafted in Thai and English with certified translation.
• Coverage of Thai and overseas assets, business interests and inheritance.
• Review and explanation of every clause with both parties before signing.
• Witness coordination and notarisation where required.
• Attendance at or coordination with the District Office on marriage registration day.
• Ongoing advice on maintaining the separation of personal and marital property post-marriage.