Prenuptial Agreements in Thailand and Real Estate: What Actually Protects a Foreign Spouse

Why a Foreign Spouse Needs to Understand the Marital Property Regime

In Thailand, marriage and real estate ownership are closely intertwined, but the underlying logic differs from that of Russia or Europe. A foreigner cannot hold land in their own name, so when married to a Thai national, the plot is usually registered in the Thai spouse's name. This raises a natural question: what happens to the house and the money invested in the purchase in the event of divorce or a dispute? A prenuptial agreement is one available tool, but it is far from the most powerful one, and it is important to understand its practical limits.

Two Property Regimes: Sin Suan Tua and Sin Somros

The Thai Civil and Commercial Code (CCC) divides spousal property into two categories.

• Sin Suan Tua - personal property. This includes everything a person owned before the marriage, as well as gifts and inheritances received personally. Only the owner may deal with personal property.
• Sin Somros - common (marital) property. These are assets acquired during the marriage using shared funds, as well as income derived from personal property. Spouses manage this property jointly.

The key point: a prenuptial agreement can only govern the management of marital property (Sin Somros). The rules of ownership and disposal of personal property cannot be altered by agreement - it always remains under the owner's control. There is therefore no basis to expect that a prenuptial agreement will 'secure' for a foreign spouse any share in land registered as the Thai spouse's personal property.

How Land Is Registered in a Mixed Marriage

When a Thai national purchases land while married to a foreigner, the Land Department typically requires a joint declaration (letter of confirmation). In it, the spouses confirm that the funds used to buy the plot constitute the Thai spouse's personal property, not shared funds and not the foreigner's money. Following such a declaration, the land is registered as Sin Suan Tua of the Thai spouse.

The consequence is straightforward: under family law, the foreign spouse acquires no ownership rights over that land and has no power to block its sale. A prenuptial agreement does not change this.

Practical Protective Tools Available to a Foreign Spouse

The law restricts foreigners only with respect to owning land, not structures built on it. A house, as a distinct item of real property, may belong to a foreigner or be held in joint ownership. This gives rise to workable protection strategies.

1. Separate registration of rights to the house. Land and a building can be registered independently. If the house is registered as marital property (Sin Somros) or partly in the foreign spouse's name, the Thai spouse will no longer be able to sell the entire property without the other spouse's consent. The governing provision is Section 1475 CCC: where marital property constitutes immovable property (see Section 456 CCC) or has a title document, either spouse may demand that their name be entered on the document as a co-owner. Management of such property is governed by Section 1476 CCC, under which any transfer requires both spouses' consent.

2. Registration of a real right over the plot. A foreigner may register in their own name:

• a usufruct (right of use, typically for life) - suited to land with a building on it;
• a superficies (right to maintain a structure on another person's land) - more commonly used for unimproved land.

These rights are registered at the Land Department and encumber the title. They cannot be removed without the foreigner's consent except by court order, even taking into account the general rule that transactions between spouses concluded during the marriage may be challenged. This is one of the most reliable options where the purchase funds came from the foreigner's personal assets.

Comparison of Protective Tools

Divorce and Division of Assets: Where the Money Came From

On dissolution of a marriage, the spouses must reconcile the 'balance' of assets. Marital property is divided equally by default - in the event of a dispute, the court allocates it having regard to the circumstances. An important detail that is often overlooked: even if land or a house is registered as the Thai spouse's personal property, if it was in fact paid for by the foreign spouse, that value is taken into account in the division. Documentary evidence of the source of funds (wire transfer records, foreign currency declaration forms on bringing money into the country) therefore has direct practical value.

Where a condominium unit is being purchased, the situation is simpler: a foreigner may own a unit directly within the 49-percent foreign ownership quota under the Condominium Act. Such a purchase typically requires that funds be brought in from abroad with a FET form obtained (previously known as Tor.Tor.3) - this both confirms the right to register the unit in the foreigner's name and records the source of funds in the event of a future division.

Points to Check and Watch Out For

• Establish the property regime early. Bear in mind that a prenuptial agreement governs only Sin Somros - it does not 'divide' land held as Sin Suan Tua.
• Preserve evidence of the source of funds - bank transfer records, the FET form for money brought in from abroad. This can determine the outcome of a division dispute.
• Register the house separately or as marital property (Section 1475) if you are contributing to the construction or purchase of the building.
• Consider a usufruct or superficies over the land - these can only be removed through court proceedings and provide strong protection.
• For a condominium unit, confirm that it falls within the 49-percent foreign quota and that the FET form is issued in your name.
• Execute the prenuptial agreement before the marriage is registered and register it together with the marriage - otherwise it is void.
• Review the wording of the joint declaration submitted to the Land Department: the description of the source of funds affects your subsequent rights.