Privy Purse Bureau

The Crown Property Bureau was established under the Royal Assets Structuring Act of 1936 and became a juristic person in 1948. According to the act, a Board of Crown Property was set up, to be chaired ex officio by the finance minister, and served by at least four royally appointed directors. The king names one of the board members as the director-general of the CPB. The Board of Crown Property is responsible for the overall supervision of the activities of the Crown Property Bureau. Duties and responsibilities of the director-general are prescribed by the Board of Crown Property.

Initially, the CPB was under the jurisdiction of the Royal Treasury of the Royal Household Bureau. On 21 April 1935, the 1934 act to exempt royal assets from taxation took effect. The act categorised royal assets into two types:

Assets eligible for tax exemption

Assets eligible for tax payment

On 19 July 1937, the Royal Assets Structuring Act of 1936 became effective. It separated the royal assets into "His Majesty's personal assets", "crown property", and "public property". "His Majesty's personal assets" would be managed by the finance ministry. The CPB was set up with a status equivalent to a division under the treasury department of the finance ministry. Some of the functions, responsibilities, and officials were transferred from the Office of the Privy Purse to the Crown Property Bureau which sought permission to locate its office on the premises of the Office of the Privy Purse on the grounds of the Grand Palace in Bangkok.

The Royal Assets Structuring Act has been amended three times: the second amendment (1941) took effect on 7 October 1941, the third amendment (1948) was promulgated on 18 February 1948 when the CPB's status was then elevated to a juristic person responsible for supervising, preserving, and managing crown property. The CPB director-general is authorized to affix his signature on behalf of the bureau. In July 2017, under the new bill, King Vajiralongkorn will set up a board of directors to oversee his assets. The king is entitled to appoint the board members, as well as to remove them, at his discretion. The law prohibits the taking away of royal assets without the king's approval. Under King Bhumibol, the board of directors for the royal assets answered to the finance minister. Now it is independent of the government.

The Crown Property Bureau has moved its office four times, with Ladawan Palace (commonly referred to as the "Red Palace") having been its home since 18 July 1946. The anniversary of the CPB's establishment is marked on 18 February.