Thailand has a developing mixed economy. It is dependent on exports, which accounted for about 58 percent of the country's gross domestic product (GDP) in 2021. Thailand itself is a newly industrialized country, with a GDP of 17.922 trillion baht (US$517.0 billion) in 2023, the 9th largest economy in Asia. In 2025 Thailand recorded average annual deflation of 0.14% and an account surplus of 7.5% of the country's GDP. Its currency, the baht, is ranked as the tenth most frequently used world payment currency in 2017.RMB role and share of international payments is declining CTMfile. 5 April 2017
As of 2012, the industrial and service sectors were the main sectors in the Thai gross domestic product, with the former accounting for 39.2 percent of GDP. Thailand's agricultural sector produced 8.4 percent of GDP—lower than the trade and logistics and communication sectors, which account for 13.4 percent and 9.8 percent of GDP respectively. The construction and mining sectors add 4.3 percent to the country's gross domestic product. Other service sectors (including the financial, education, and hotel and restaurant sectors) account for 24.9 percent of the country's GDP. Telecommunications and trade in services are emerging as centers of industrial expansion and economic competitiveness.
Thailand is the second-largest economy in Southeast Asia, after Indonesia. Its per capita GDP was 255,362 baht (US$7,210) in 2023 and ranked fourth in Southeast Asian per capita GDP, after Singapore, Brunei, and Malaysia. In December 2025, Thailand held US$306.51 billion in international reserves, the second-largest in Southeast Asia (after Singapore). Its surplus in the current account balance ranks tenth of the world, made US$37.898 billion to the country in 2018. Thailand ranks second in Southeast Asia in external trade volume, after Singapore.
The nation is recognized by the World Bank as "one of the great development success stories" in social and development indicators. Despite a per capita gross national income (GNI) of US$7,090 and ranking 66th in the Human Development Index (HDI), the percentage of people below the national poverty line decreased from 65.26 percent in 1988 to 8.61 percent in 2016, according to the Office of the National Economic and Social Development Council's (NESDC) new poverty baseline.
Thailand is one of the countries with the lowest unemployment rates in the world, reported as one percent for the first quarter of 2014. This is due to a large proportion of the population working in subsistence agriculture or on other vulnerable employment (own-account work and unpaid family work). TNSO The National Statistical Office of Thailand.
"Over half of all Thailand's workers are in vulnerable employment (defined as the sum of own-account work and unpaid family work) and more than 60 percent are informally employed, with no access to any social security mechanisms". Thailand. A labour market profile, International Labour Organization, 2013.
History
Ayutthaya era (1351–1767) Thailand, formerly known as Siam, opened to foreign contact in the pre-industrial era. The diverse natural resources of Siam were underutilized. However, coastal ports and cities at the river mouths were early economic centers which welcomed merchants from Persia, Arab countries, Chinese dynasties and various kingdoms in South and Southeast Asia. The rise of Ayutthaya during the 14th century was connected to renewed maritime trade with China, India and Southeast Asia. Ayutthaya became one of the most prosperous trade centers in Asia. However, the Burmese–Siamese War (1765–1767) caused immense economic harm with trade disruption and the eventual destruction of Ayutthaya in 1767.
Rattanakosin era (1782–1932) When the capital of the kingdom moved to Bangkok during the 19th century, foreign trade (particularly with China) became the focus of the government. Chinese merchants came to trade; some settled in the country and received official positions. A number of Chinese merchants and migrants became high dignitaries in the court.
From the mid-19th century onward, European merchants were increasingly active. The Bowring Treaty, signed in 1855, guaranteed the privileges of British traders. The Harris Treaty of 1856, which updated the Roberts Treaty of 1833, extended the same guarantees to American traders. There were multiple costly conflicts with French Indochina from the 18th till the mid 20th century. Siam lost major disputed territories such as Laos and Cambodia to the French colonists. The British Empire gained control over Siamese provinces in the Malay peninsula and on the western border with British Burma. Nevertheless, Thailand was the only Southeast Asian country that remained sovereign from European colonial powers.
The domestic market developed slowly, with serfdom, slavery related to the sakdina system as major causes of domestic stagnation. Most of the male population in Siam was in the service of court officials, while their wives and daughters may have traded on a small scale in local markets. Those who were heavily indebted might sell themselves as slaves. King Rama V abolished serfdom and slavery in 1901 and 1905, respectively.
Thailand was a member of the Allies of World War I. From the early 20th century to the end of World War II, Siam's economy gradually became globalized. Major entrepreneurs were ethnic Chinese who became Siamese nationals. Exports of agricultural products (especially rice) were very important and Thailand has been among the top rice exporters in the world. The Siamese economy suffered greatly from the Great Depression, a cause of the Siamese revolution of 1932.
Significant investment in education in the 1930s (and again in the 1950s) laid the basis for economic growth, as did a liberal approach to trade and investment.
Bhumibol era (1946–2016)
Post-war era (1945–1955) Postwar domestic and international politics played significant roles in Thai economic development for most of the Cold War era. From 1945 to 1947 (when the Cold War had not yet begun), the Thai economy suffered because of World War II. During the war, the Thai government (led by Field Marshal Plaek Phibunsongkram) allied with Japan and declared war against the Allies. After the war, Thailand had to supply 1.5 million tons of rice to Western countries without charge, a burden on the country's economic recovery. The government tried to solve the problem by establishing a rice office to oversee the rice trade. During this period, a multiple-exchange-rate system was introduced amid fiscal problems, and the kingdom experienced a shortage of consumer goods.
In November 1947, a brief democratic period was ended by a military coup and the Thai economy regained its momentum. In his dissertation, Somsak Nilnopkoon considers the period from 1947 to 1951 one of prosperity. By April 1948, Phibunsongkram, the wartime prime minister, returned to his previous office. However, he was caught in a power struggle between his subordinates. To preserve his power, Phibunsongkram began an anti-communist campaign to seek support from the United States. As a result, from 1950 onward, Thailand received military and economic aid from the US. The Phibunsongkram government established many state enterprises, which were seen as economic nationalism. The state (and its bureaucrats) dominated capital allocation in the kingdom. Ammar Siamwalla, one of Thailand's most prominent economists, calls it the period of "bureaucratic capitalism".
Power struggle and reform (1955–1985) In 1955, Thailand began to see a change in its economy fueled by domestic and international politics. The power struggle between the two main factions of the Phibun regime—led by Police General Phao Sriyanond and General (later, Field Marshal) Sarit Thanarat—increased, causing Sriyanond to unsuccessfully seek support from the US for a coup against Phibunsongkram regime. Plaek Phibunsongkram attempted to democratize his regime, seeking popular support by developing the economy. He again turned to the US, asking for economic rather than military aid. The US responded with unprecedented economic aid to the kingdom from 1955 to 1959. The Phibunsongkram government also made important changes to the country's fiscal policies, including scrapping the multiple-exchange-rate system in favor of a fixed, unified system which was in use until 1984. The government also neutralized trade and conducted secret diplomacy with the People's Republic of China (PRC), displeasing the United States.
Despite his attempts to maintain power, Plaek Phibunsongkram was deposed (with Field Marshal Phin Choonhavan and Police General Phao Siyanon) on 16 September 1957 in a coup led by Field Marshal Sarit Thanarat. The Thanarat regime (in power from 1957 to 1973) maintained the course set by the Phibunsongkram regime with US support after severing all ties with the PRC and supporting US operations in Mainland Southeast Asia and the ongoing Vietnam War (1955-1975). It developed the country's infrastructure and privatized state enterprises unrelated to that infrastructure. During this period, a number of economic institutions were established, including the Bureau of Budget, the NESDC, and the Thailand Board of Investment (BOI). The National Economic and Social Development Plan was implemented in 1961. During this period, the market-oriented Import-Substituting Industrialization (ISI) led to economic expansion in the kingdom during the 1960s. According to former President Richard Nixon's 1967 Foreign Affairs article, Thailand entered a period of rapid growth in 1958 (with an average growth rate of 7 percent per year).
Economic problems (1970–1984) From the 1970s to 1984, Thailand suffered from many economic problems: decreasing US investment, budget deficits, oil-price spikes, and inflation. Domestic politics were also unstable. With the Vietnamese occupation of Cambodia on 25 December 1978, Thailand became the front-line state in the struggle against communism, surrounded by two communist countries and a socialist Burma under General Ne Win. Successive governments tried to solve the economic problems by promoting exports and tourism, still important for the Thai economy.
One of the best-known measures to deal with the economic problems of that time was implemented under General Prem Tinsulanonda's government, in power from 1980 to 1988. Between 1981 and 1984, the government devalued the national currency, the Thai baht (THB), three times. On 12 May 1981, it was devalued by 1.07 percent, from THB20.775/US$ to THB21/US$. On 15 July 1981, it was again devalued, this time by 8.7 percent (from THB21/US$ to THB23/US$). The third devaluation, on 5 November 1984, was the most significant: 15 percent, from THB23/US$ to THB27/US$. The government also replaced the country's fixed exchange rate (where it was pegged to the US dollar) with a "multiple currency basket peg system" in which the US dollar bore 80 percent of the weight. Calculated from the IMF's World Economic Outlook Database, in the period 1980–1984, the Thai economy had an average GDP growth rate of 5.4 percent.
Economic boom (1985–1997) Concurrent with the third devaluation of the Thai baht, on 22 September 1985, Japan, the US, the United Kingdom, France, and West Germany signed the Plaza Accord to depreciate the US dollar in relation to the yen and the Deutsche Mark. Since the dollar accounted for 80 percent of the Thai currency basket, the baht was depreciated further, making Thailand's exports more competitive and the country more attractive to foreign direct investment (FDI) (especially from Japan, whose currency had appreciated since 1985). In 1988, Prem Tinsulanonda resigned and was succeeded by Chatichai Choonhavan, the first democratically elected prime minister of Thailand since 1976. The Cambodian-Vietnamese War was ending; Vietnam gradually retreated from Cambodia by 1989, enhancing Thai economic development.