Separate and Shared Marital Property in Thailand: sin suan tua and sin somros

When one spouse purchases real estate in Thailand, the central question is almost always the same: whose property is it? The answer determines whether the other spouse must consent to the transaction, how the asset will be divided upon divorce, and who inherits it. Thai family law addresses this through two concepts: sin suan tua (separate property) and sin somros (community, or marital, property). The governing rules are set out in the Civil and Commercial Code of Thailand (CCC), Book V, 'Family'.

Two Property Regimes

Thai law proceeds on the basis that each spouse has his or her own individual property while, at the same time, a common pool of assets accumulated during the marriage exists alongside it. These two bodies of property operate under different rules.

• Sin suan tua (CCC §1471) - a spouse's separate property. That spouse may deal with it independently, without the other spouse's consent.
• Sin somros (CCC §1474) - property acquired during the marriage through the spouses' joint efforts; both spouses must act together when dealing with it.

What Constitutes Separate Property (sin suan tua)

Under §1471, the following constitute separate property:

• everything a spouse owned before the marriage;
• items for personal use, working tools, and instruments of professional practice;
• property received during the marriage by inheritance or as a gift (unless the will or deed of gift expressly states that it becomes community property);
• khong man (khongman) - property transferred to the prospective wife as security for an engagement.

One important point: if separate property is exchanged for other property, sold, or replaced after loss by newly purchased property, the replacement asset also retains its separate character (§1472). In other words, separate status is not lost through a straightforward substitution of assets - proceeds from the sale of a pre-marital apartment that are reinvested in a new one retain their sin suan tua character.

What Constitutes Community Property (sin somros)

Under §1474, the following are treated as community property:

• property acquired during the marriage (for example, purchased with either spouse's income);
• income generated by separate property - rent, interest, dividends;
• property that a will or deed of gift expressly designates as community property.

A key evidentiary rule applies here: where there is doubt, property is presumed to be community property (§1474, paragraph 2). If a spouse claims that an asset is his or her separate property, the burden of proof lies with that spouse. Accordingly, documentary evidence of the source of funds (bank statements, agreements, deeds of gift) carries practical importance.

Comparison of the Two Regimes

Management of Community Property

Under §1476, a number of significant transactions involving community property must be carried out jointly by both spouses: sale, mortgage, gifting of real property, long-term lease, and similar acts. If one spouse enters into such a transaction without the other's consent, the other spouse may seek its annulment (§1480) - however, that right is subject to a time limit and does not apply against a bona fide purchaser who had no knowledge of the absence of consent. Each spouse may independently manage the family's ordinary day-to-day expenses.

Why This Is Critical for Foreign Nationals

The marital property regime intersects directly with the restrictions on real property ownership.

• Land. A foreign national may not own land in Thailand. When a Thai citizen who is married to a foreign national purchases land, the Land Department requires both spouses to sign a declaration stating that the funds used are the separate property (sin suan tua) of the Thai spouse. This keeps the land outside the community pool, so that the foreign spouse formally acquires no share in it. This is standard practice, designed to prevent a foreign national from holding an indirect interest in land.

• Condominium. A foreign national may hold a unit in a condominium directly, within the foreign ownership quota of 49 percent of the total saleable area of the building (Condominium Act). For title to be registered in a foreign national's name, the purchase funds must be remitted from abroad in foreign currency; the bank then issues a FET form (Foreign Exchange Transaction, formerly Tor Tor 3) confirming that the funds were brought into the country. If a unit is purchased with community funds during the marriage, it will be treated as sin somros on divorce, even if it is registered in only one spouse's name.

• Mixed-nationality marriage and proof of separate ownership. Because of the presumption of community character (§1474), a foreign spouse who wishes to preserve an asset as separate property should document the source of the funds in advance - particularly where the funds were acquired before the marriage or received as a gift.

Divorce and Succession

On dissolution of the marriage, community property (sin somros) is as a general rule divided equally, while separate property remains with its owner (§1533). On the death of a spouse, the surviving spouse's share is first extracted from the community pool, and only the remaining portion, together with the deceased spouse's separate property, forms the estate. Correct classification of an asset therefore affects both the division on divorce and the size of the estate.

Key Points to Check and Watch Out For

• The date of acquisition of the asset: before or during the marriage - this determines which regime applies.
• The source of the funds: retain bank statements and agreements confirming that the money is separate property (especially in cases of gift or inheritance).
• When purchasing land in a mixed-nationality marriage - the Thai spouse's willingness to sign the sin suan tua declaration.
• When a foreign national purchases a condominium - compliance with the 49 percent quota and obtaining the FET - Tor Tor 3 form for the imported foreign currency.
• For significant transactions involving community property - the other spouse's written consent (§1476).
• If you wish to establish a different regime, consider a prenuptial agreement registered before the marriage (it is valid in Thailand if the formal requirements of §§1465-1466 are met).
• In a mixed-nationality marriage - identify and record which assets are separate property at an early stage, to avoid the presumption of community character arising in the event of a dispute.