What a Thai Prenuptial Agreement Can Do

Updated: October 19, 2025

• List assets and debts: Attach schedules that identify each spouse’s personal assets and liabilities at the time of marriage.
• Management rules: Clarify who manages which assets and mirror the acts that require joint consent under Section 1476.
• Tracing and replacement: Confirm that the replacement or proceeds of a personal asset remain personal if traceable (Section 1472).
• Bilingual execution: Use Thai–English; have both spouses initial every page and each schedule. Specify the controlling language in case of discrepancies.

What a Thai Prenuptial Agreement Cannot Do

• Override the Thai Civil and Commercial Code: A prenup cannot change the statutory classification of marital property under Thai law. For example, it cannot classify fruits of property (dividends, interest, rental income) as personal property instead of marital property (Section 1474(3)).
• Exclude earned income or pensions: Wages, income, and pensions acquired during marriage are legally marital property (Section 1474(1)), even if the prenup tries to state otherwise.
• Determine child-related matters: Child custody, child support, and parental authority cannot be predetermined in a prenup and are ultimately decided by the court based on the best interests of the child.
• Waive statutory rights or obligations: Any clause that violates Thai law, public order, or good morals (Section 1465) is void and unenforceable. A prenup cannot remove a spouse’s legal rights or protections granted by statute.
• Select foreign law to govern marital property: A Thai prenup cannot stipulate that the marital property regime is governed by foreign law, Thai law governs property for marriages legally registered in Thailand.
• Impose behavioral or moral penalties: Clauses that impose fines or punishments for adultery, gambling, bad behavior, or similar actions are unenforceable under Thai law.
• Waive spousal maintenance obligations: A prenup cannot eliminate legal duties of financial maintenance or support between spouses.
• Be modified after marriage without a court order: Once registered, a Thai prenuptial agreement cannot be changed or cancelled by mutual agreement alone — it requires approval from a Thai court (Section 1467).
• Be registered after the wedding: Prenuptial agreements must be signed and filed at the time of marriage registration. If submitted later, they are invalid under Thai law (Section 1466).

Quick Principles Expats Often Miss

• Appreciation is not 'fruit': If you owned an asset before marriage (a condo, a stock, or 1 bitcoin), a pure increase in market value remains personal. But the 'fruits' it generates during marriage (rent, dividends, interest) are marital.
• No “51% rule”: Thai law does not convert an asset to personal merely because one spouse paid “more than half.” Courts look at source of funds, tracing, evidence, and may award proportionate shares or reimbursement.
• Timing is strict: The prenup must be submitted with the marriage. A late filing is not a valid prenup.
• Foreign assets: Thai prenups govern Thai-located assets. For assets abroad, consider a coordinated second (foreign) prenup so a local court will enforce it.

How to Register a Thai Prenuptial Agreement

A prenuptial agreement in Thailand must be registered at the district office (Amphur or Khet) on the same day the marriage is registered. It is attached to the official marriage register. If it is not submitted and attached at that exact time, it has no legal effect under Section 1466 of the Civil and Commercial Code.

When and Where to File

• Same day filing: The prenup must be filed together with the marriage registration—not before or after. You can show a draft to the officer the day before, but the official registration must occur on the wedding day.
• District office (Amphur/Khet): Register the marriage at the office where the Thai spouse’s house registration (tabien baan) is located or where both parties agree to register. The same office handles the prenup attachment.
• Processing time: About 20–30 minutes if documents are complete; longer if the officer reviews bilingual content.

Two Ways to Register a Thai Prenuptial Agreement in the Marriage Register

Under Thai law, a prenuptial agreement must be recorded in the official marriage register (Kor Ror 2 – ทะเบียนสมรส คร.2) on the same day the marriage is registered. There are two accepted methods at the district office (Amphur or Khet):

1. Terms Written Directly in the Marriage Register (Kor Ror 2)

For short and simple Thai prenuptial agreements, the registrar can write the agreed terms directly in the remarks section of the Kor Ror 2 marriage register. In this case, no separate contract is needed, the entry in the marriage register itself is the legally binding prenuptial agreement.

Drawback: Because space in the Kor Ror 2 is limited, couples rarely include a full schedule of each spouse's personal assets. In a later divorce, a detailed, signed list of separate property can be powerful evidence. If you expect to list many assets (especially overseas property, investments, or business interests), method 2 is usually more suitable.

2. Separate Contract Attached to the Marriage Register

For longer or bilingual prenups (common when one spouse is a foreigner), the couple signs a separate written prenuptial agreement (usually in Thai or Thai-English), together with at least two witnesses. On the wedding day, this contract is filed at the district office and physically attached to the back of the Kor Ror 2 register. The registrar then notes in the marriage register that a prenuptial agreement is attached.

This method allows you to include detailed schedules of personal assets and liabilities in annexes, which can later serve as strong evidence of what was considered separate property under Thai law at the time of marriage.

Important: In both methods, the existence of the prenup must appear in the Kor Ror 2 marriage register on the same day the marriage is registered. If the prenuptial agreement is not recorded or attached at that time, it has no legal effect under Section 1466 of the Thai Civil and Commercial Code. Read more: How to Register a Prenuptial Agreement in Thailand.

Documents and Preparation

• Bilingual text: Use a Thai–English version so the officer can read the Thai part. Specify which language controls in case of discrepancy.
• Signatures: Both spouses and two witnesses must sign every page and each schedule of assets or debts.
• Schedules attached: Add “Schedule A – Personal Assets Debts” to list what each party owns before marriage.
• ID and documents: Thai ID card and house register for the Thai spouse; passport and embassy “Affidavit of Freedom to Marry” for the foreigner; copies for all witnesses.

Local Office Differences

Procedures can differ slightly among district offices. Some officers are very familiar with bilingual prenups, others may hesitate if they cannot read English or if the content seems to override Thai law. To avoid problems:

• Call or visit the Amphur a few days in advance and ask if they accept Thai–English prenuptials.
• Bring a short Thai cover page (included in the divorce agreement tempate) stating that the contract is attached to the marriage register (คำขอแนบสัญญาก่อนสมรส).
• Be ready to re-sign the signature page in front of the officer if asked for confirmation.

Practical Tips

• Print two or three identical sets, one will be attached to the marriage record, one for your own file.
• Keep the clauses consistent with Thai law; avoid wording that “waives statutory rights” or makes all income separate property.
• Ask for a copy with an official stamp showing that the prenup was attached on the marriage registration date.
• If an officer is uncertain, politely mention Section 1466 CCC: the law allows prenups to be attached on the marriage date without court approval.

A well-prepared Thai–English prenup is normally accepted once officers see that it follows the Civil and Commercial Code and is clearly bilingual. The key is to prepare and sign correctly, then attach it the same day as the marriage registration.

Related

• Is my Thai prenuptial agreement valid overseas?
• Divorce in Thailand
• Marital Home Thai Property Law
• Civil & Commercial Code sections 1465–1466, 1472, 1474, 1476