In Thailand, marital property is referred to as Sin Somros. Section 1474 of the Civil and Commercial Code provides that Sin Somros consists of:1. Earnings and most other property acquired during marriage;2. Property acquired during marriage through a will or gift made in writing if it is declared by such will or document of gift to be Sin Somros

3. Fruits of Sin Suan Tua non-marital assets.In case of doubt as to whether or not an asset should be considered marital property or Sin Somros, the law provides that it shall be presumed to be marital property.Since marriage is considered under Thai law to be an economic contract or partnership, property that is acquired during the time a couple is married is generally considered marital property. Consequently, marital property may include tangible assets such as cash in hand or in a bank account, vehicles, paintings, and so forth, plus non-tangible assets such as retirement benefits or lease rights, among others. Marital property also includes the fruits that are generated by a spouses non-marital property during the marriage. For example, if one partner owns a dairy farm before the marriage, the income generated by selling dairy products during the marriage is treated as the couples marital property.

via Marital Assets and debts under Thai Law.