Prostitution is not strictly illegal in Thailand, though solicitation and public nuisance laws are in effect. In practice it is tolerated and partly regulated. Prostitution operates clandestinely in many parts of the country. Local officials with commercial interests in prostitution often protect the practice. The precise number of prostitutes is difficult to assess; estimates vary widely and are subject to national and international controversy. Since the Vietnam War, Thailand has gained international notoriety among travellers from many countries as a sex tourism destination. In July 2016 it was reported that the Thai government intends to abolish the sex industry. Ms Kobkarn Wattanavrangkul, the tourism minister, said "Tourists don't come to Thailand for [sex]. They come here for our beautiful culture" and that "We want Thailand to be about quality tourism. We want the sex industry gone".
Estimates of the number of prostitutes in Thailand vary widely and are subject to controversy. A 2004 estimate by Dr. Nitet Tinnakul of Chulalongkorn University gave a total of 2.8 million sex workers, including 2 million women, 20,000 adult males, and 800,000 minors under the age of 18, but the figures for women and minors were considered to be grossly inflated by most observers, and to have resulted from poor research methods. According to a 2001 report by the World Health Organisation: "The most reliable suggestion is that there are between 150,000 and 200,000 sex workers." In its annual human rights report for 2008, the US State Department noted that, "A government survey during the year found that there were 76,000 to 77,000 adult prostitutes in registered entertainment establishments. However, NGOs believed there were between 200,000 and 300,000 prostitutes." The state department's 2013 Human Rights Report for Thailand made no estimates of the extent of prostitution, but in 2015 Havocscope, a database providing information about the global black market, gave a figure of about 250,000 for the number of prostitutes working in Thailand. UNAIDS in 2014 estimated the total population of sex workers in Thailand to be 123,530.
It has been suggested for example that there may be as many as 10,000 prostitutes on Ko Samui alone, an island resort destination not usually noted for prostitution, and that at least 10 percent of tourist dollars may be spent on the sex trade. An estimate published in 2003 placed the trade at US$4.3 billion per year, or about three percent of the Thai economy. In 2015 Havocscope said that about $6.4 billion dollars in annual revenue was being generated by the trade, a figure which accounted for 10 percent of Thailand's GDP. Sex workers in Thailand send an annual average of US$300 million to family members who reside in more rural areas of Thailand.