UDON THANI, THAILAND – An expanding crackdown on visa abuses in Thailand has thrown a spotlight on the thousands of foreign teachers working in classrooms without legal status.
Classrooms on the edge of legality
At a private school in northeastern Thailand, a foreign teacher referred to as Mark stood at the board writing “Vocabulary”, while knowing he officially remained only a tourist without a Non-Immigrant B visa or work permit. Expat forums and social media discussions indicated that his case was part of a wider pattern, with an unknown but widely assumed high number of foreign teachers working without the required documents in 2025. As the government expanded its “Smart Immigration” system and rolled out digital work permits, many schools and staff remained stuck in a mix of bureaucracy and cost pressures that encouraged off-the-books employment.
Complex visa rules and digital oversight
To work legally, foreign teachers had to start in their home countries by securing a Non-Immigrant B visa, which required an employment contract and formal invitation from a Thai school. Many institutions, however, only issued these papers once a teacher had already arrived and completed a trial period, pushing applicants to enter on tourist visas and take the first step into illegality. Once in Thailand, the former blue work-permit booklet was being replaced by a smartphone-based E-Work-Permit app, creating continuous digital tracking of employers, locations and job changes.
Krusapa requirements squeeze applicants
For many, the larger obstacle was the Teachers Council of Thailand (Krusapa), whose licence was mandatory for legal teaching jobs. Requirements had become stricter, with at least a bachelor’s degree needed and additional pedagogical training often demanded if the degree was in subjects such as history or business administration rather than education. Previously common waivers that allowed teaching for up to six years without full licensing were granted more sparingly, and a new system of P- and A-licences added further confusion and paperwork that some schools chose to avoid by offering illegal contracts.
Economic incentives for illegal hiring
Schools faced significant costs for properly documented foreign staff, including visa and permit fees, taxes and social contributions on top of salaries. In rural areas and at smaller private schools operating on tight budgets, administrators struggled to pay wages high enough to attract fully qualified, legal teachers, even as fee-paying parents expected their children to learn English from a foreign “farang”. This created a mutual dependency in which schools gained a foreign face for marketing and teachers obtained employment they might not secure in their home countries, but at the cost of legal security.
Low pay and limited protection
At top international schools in Bangkok, salaries of 80,000 to more than 150,000 baht (about €2,190 to €4,100) were reported, but typical pay at government and modest private schools elsewhere often ranged between 30,000 and 35,000 baht, roughly €820 to €960. While relatively high by local standards, such income left many foreign teachers struggling with insurance, travel home and retirement savings. Those working illegally usually had no access to Thailand’s social security system, leaving them exposed to financial ruin in the event of a motorbike accident or serious illness.
Life in the shadows and changing visa options
The psychological strain of life without a work permit included constant fear of police checks and anxiety about being reported by colleagues or neighbours, leading some foreign residents to avoid sharing details of their status or posting classroom photos online. Historically common “visa runs” to borders with Laos or Cambodia had become harder as immigration officers more closely examined repeated tourist entries, while some teachers turned to costly Elite Visa packages or the new Destination Thailand Visa (DTV) intended for digital nomads. Holding such visas did not legalise classroom work, leaving those teachers still in violation of labour rules despite their immigration status.
Penalties for teachers and schools
Thai law set clear penalties for foreigners working without permits, including fines of 5,000 to 50,000 baht (€135 to €1,370) and subsequent deportation. Detainees often faced time in Bangkok’s Immigration Detention Centre, where conditions were described as overcrowded with poor hygiene and uncertain release dates. After deportation, offenders could be placed on a “blacklist” barring re-entry for one, five or ten years, while schools risked fines of up to 100,000 baht (€2,740) per illegally employed worker, a cost some operators still accepted given the relative rarity of inspections.
Tech-driven enforcement and a two-tier system
By 2025, authorities relied increasingly on biometric checks at borders and data-sharing between the Labour Ministry, immigration and tax offices, making it harder for illegal workers to go unnoticed. At the same time, Thailand pursued its ambition to become a hub for international education, a goal at odds with the image of unqualified backpackers teaching English. The result was a two-tier landscape, with well-paid, fully documented staff at elite schools on one side and poorly paid, often illegal teachers keeping provincial classrooms running on the other.
Calls for reform and uncertain prospects
Specialists had long called for streamlined visa procedures for teachers, arguing that current bureaucratic hurdles were disproportionate to earnings and discouraged proper registration. However, with national security and protection of the domestic labour market remaining high priorities, significant easing of rules appeared unlikely in the near term. For individuals like Mark, options included upgrading qualifications, pursuing advanced degrees or relocating to countries such as Vietnam or China with different requirements, or continuing to hope that inspections would not reach their schools.
Structural gap keeps the system afloat
Observers noted that the system’s persistence rested on simple supply and demand: a steady flow of Westerners attracted by life in Thailand and millions of Thai students needing English skills that local teachers alone could not provide. Illegal employment functioned as a buffer that allowed schools to offer foreign-taught classes they could not otherwise afford under full compliance. Official raids appeared to serve mainly as deterrents or political signals rather than attempts to eliminate the practice entirely, since removing all illegal teachers at once would severely disrupt English instruction in many regions.
A shrinking space for risky work
Looking ahead, digital verification and stricter entry controls were expected to reduce opportunities for would-be teachers without proper credentials to enter the classroom at all. That shift could raise overall quality but also deepen teacher shortages in poorer areas reliant on lower-paid foreigners. The gap between the number of foreign teachers reported to the Education Ministry and the tally of valid work permits at the Labour Ministry pointed to a significant, if unquantified, population working outside the law.
Warning to would-be teachers
Discussion in online communities reflected growing fear and uncertainty among long-term foreign staff as rules tightened. The underlying message for those considering similar paths was that Thailand remained welcoming to visitors but no longer tolerated a loosely regulated labour market for foreign teachers.
“Thailand is hospitable, but the labour market is no longer a lawless space. Anyone still teaching without papers today is playing roulette with their future.”
said the unnamed editorial note, which stressed that violations of Thai labour and immigration law were subject to criminal prosecution.