Foreign Worker Rules in Thailand: Prohibited Occupations, Work Permit Fines and Employer Penalties
Foreigners working in Thailand face three statutory red lines: first, they may not engage in occupations that the Minister has announced as prohibited to foreignersSection 7; second, working without a work permit, or beyond the scope of rights granted, is prohibited outrightSection 8, punishable by a fine of 5,000 to 50,000 baht followed by removal from the KingdomSection 101; third, no person may employ a foreigner who has no work permitSection 9 — employers face a fine of 10,000 to 100,000 baht per foreigner employed, and repeat offenders face up to one year of imprisonment, a fine of 50,000 to 200,000 baht per person, and a three-year ban on employing foreign workersSection 102.
What counts as "work"? The definition is broader than you think
The Emergency Decree on Managing the Work of Foreigners (B.E. 2560, 2017) defines "work" as the pursuit of any occupation, whether with or without an employer, excluding only the conduct of business by a licensee under the Foreign Business ActSection 5. In other words, even if no Thai company pays you a salary, and even if you are working for your own business, any occupational activity carried out inside Thailand in principle falls within "work" and requires a work permit. As for where and in what form the remuneration is paid, the statutory definition does not treat this as a determining factor — never assume you are safe because "the salary is not paid in Thailand."
The Decree also expressly lists the cases to which it does not apply, chiefly: diplomatic and consular personnel; representatives of member countries and officials of the United Nations and its specialized agencies; persons performing duties or missions under agreements between the Thai Government and a foreign government or an international organization; persons entering temporarily to participate in meetings, deliver lectures, attend training or seminars, or take part in artistic or cultural exhibitions or sports competitions; persons entering to conduct business or make investments, or possessing high knowledge, ability or skill beneficial to the country's development, as prescribed by the Cabinet; and representatives of foreign juristic persons licensed to conduct business under the Foreign Business ActSection 4. Whether an exemption applies must be assessed case by case — when in doubt, seek advice before starting work.
Red line 1: occupations prohibited to foreigners
The Decree empowers the Minister — that is, the Minister of Labor responsible for its enforcementSection 6 — with the approval of the Committee, to announce the determination of work that foreigners are prohibited from doing, whether by absolute prohibition or by conditional prohibition. The determination must take into account national security, opportunities for employment and professional practice of Thai nationals, the promotion of Thai wisdom and identity, the foreign labor needed for the country's development, and the obligations Thailand bears in the nature of customary international lawSection 7.
Which occupations foreigners are barred from (often called the "prohibited occupations list" in practice) is determined — and adjusted over time — by separate ministerial announcements; the text of the Decree itself contains no list. Before taking up any specific occupation, always rely on the official announcements currently in force — our firm can help confirm, item by item, whether the work you plan to do is prohibited or subject to conditions.
Note also: even with a work permit, the holder is legally entitled to perform only work not prohibited by an announcement under Section 7Section 59. The occupation ban and the work permit are two independent gates — you must clear both.
Red line 2: foreigners working without a permit — fine plus removal
Section 8 of the Decree prohibits foreigners from working without a work permit and from working beyond the scope of rights they are entitled to haveSection 8. Working "beyond scope" is equally unlawful — a point often overlooked; for example, when the permit registers employer A but the person is in fact working for employer B.
The consequences of violating Section 8 are spelled out clearlySection 101:
- A fine of 5,000 to 50,000 baht;
- after payment of the fine, the foreigner will be promptly sent out of the Kingdom (except special categories of foreigners under Section 63 and Section 63/1);
- the above penalties do not apply to foreign workers who are victims of, or witnesses in, human trafficking cases;
- if the accused foreigner agrees to leave the country voluntarily, the investigating official may settle the matter by fine under the criteria determined by a joint committee; once the foreigner has left the Kingdom, the case is deemed dismissed.
Red line 3: employing unpermitted foreigners — per-worker fines, jail for repeat offenders
Section 9 of the Decree provides that no person may employ a foreigner who has no work permit, nor allow a foreigner to work beyond the scope of rights the foreigner is entitled to haveSection 9. The corresponding employer penalty is among the heaviest provisions in the entire lawSection 102:
First offense Per-worker fine
A fine of 10,000 to 100,000 baht for each unpermitted foreigner employed. Hire ten people and the fine is computed separately for all ten, with the ceiling scaling accordingly.
Repeat offense Criminal liability
Imprisonment of up to one year, or a fine of 50,000 to 200,000 baht per person employed, or both.
Additional consequence Three-year hiring ban
Repeat offenders are banned from employing foreign workers for three years from the date of the court's final judgment — a near-fatal blow for businesses that depend on foreign staff.
The Decree also makes clear that persons residing in the same household as the employer are not, on that basis, deemed principals, accomplices, or accessoriesSection 102 — family members are not held collectively liable.
An employer reporting duty that is easy to overlook
Even when hiring a foreigner who holds a permit, the employer must notify the registrar of the foreigner's name, nationality, and the nature of the work within 15 days from the date of employment; when the foreigner leaves employment, the employer must likewise notify the registrar within 15 days from the date of departure, stating the reasonSection 13. Failure to report as required is punishable by a fine of up to 20,000 bahtSection 103.
Correspondingly, the work permit holder personally has a duty to notify the registrar of the employer, the workplace, and the nature of the principal work within 15 days from the date of commencing work, and must do so every time the employer changesSection 64/2. Switching bosses without updating the registration may amount to the "working beyond scope" violation described above.
How to do it legally: the work permit pathways
Standard application
A foreigner who has a residence in Thailand, or is permitted to enter temporarily under immigration law (other than for tourism or transit), may work only in work not prohibited by an announcement under Section 7 and must obtain a work permit. Where an employer is already engaged, the application must state the employer's name; the permit is valid for the period requested, but no more than two years from the date of issuance. The ministerial regulation must also prescribe the processing time from acceptance of the application to issuance of the permit, which may not exceed 15 working daysSection 59.
Applying from outside Thailand
A foreigner still outside the Kingdom may submit the application and pay the fee through an electronic system; the employer may also apply for the work permit on the foreigner's behalf and pay the fee for themSection 60. This means the permit process can be set in motion before entry, avoiding the risk of a post-arrival gap spent working illegally.
Necessary and urgent short-term work
A foreigner entering temporarily under immigration law to perform work of a necessary or urgent nature, or specific work with a completion period of no more than 15 days, may work upon submitting written notice to the registrar; if the work is not finished in time, the foreigner may notify the registrar before the period expires to request an extension of no more than 15 days. What counts as "work of a necessary or urgent nature" is determined by announcement of the Director-GeneralSection 61.
BOI and other special-law tracks
For a foreigner authorized to enter and work in the Kingdom under the Investment Promotion Act, the Petroleum Act, or other laws, once the responsible agency notifies the registrar, the registrar must issue the work permit within 7 days from the date of receiving the notification; while it is being processed, the foreigner may work provisionally. Permits on this track are not subject to the prohibited-occupations announcement under Section 7, and remain valid for the same period as the work authorization under that special lawSection 62.
Practical advice for employers and foreign employees
- Check the prohibited-occupations list before discussing the role: whether the job content touches an occupation prohibited by ministerial announcement determines whether the work can lawfully be done at allSection 7.
- Keep the permit scope aligned with reality: changing employer, changing job duties, or changing workplace can each amount to working beyond scope — file the change notifications promptlySection 8Section 64/2.
- Employer-side compliance costs far less than the fines: the 15-day reporting duty is not hard to fulfill, but missing it means a fine — and employing unpermitted workers is fined per headSection 13Section 102.
- Plan before entry: use the overseas electronic application or the employer-filed route to line up the permit and the visa togetherSection 60.
SLF provides one-stop work authorization services — from prohibited-occupations checks, new Work Permit applications and renewals, and employer notifications, through to liaison on the BOI special track. If you plan to work in Thailand or to hire foreign staff, contact our firm for a compliance assessment first.
FAQ
What happens if a foreigner works in Thailand without a work permit?
Under Section 8, working without a permit or beyond the permitted scope is prohibited; under Section 101, violators face a fine of 5,000 to 50,000 baht and, after paying the fine, will be sent out of the Kingdom (except special categories of foreigners under Section 63 and Section 63/1). If the person agrees to leave the country voluntarily, the matter may be settled by fine under the prescribed rules, and once they have left, the case is deemed dismissed.
How much is an employer fined for hiring a foreigner without a work permit?
Under Section 102, a first offense is fined per head: 10,000 to 100,000 baht for each unpermitted foreigner employed. A repeat offense carries imprisonment of up to one year, or a fine of 50,000 to 200,000 baht per person, or both, plus a ban on employing foreign workers for three years from the date of the court's final judgment.
Which occupations are foreigners prohibited from doing in Thailand?
Section 7 of the Decree empowers the Minister (per Section 6, the Minister of Labor), with the approval of the Committee, to announce the work foreigners are prohibited from doing, whether by absolute or conditional prohibition, taking into account national security, employment opportunities for Thai nationals, and other factors. The specific list of occupations is set — and adjusted — by separate ministerial announcements; the Decree itself contains no list, so the official announcements currently in force are controlling. Our firm can help you confirm.
How long is a work permit valid, and how long does the application take?
Under Section 59, a standard work permit is valid for the period requested but no more than two years from the date of issuance, and the processing time prescribed by ministerial regulation may not exceed 15 working days; under Section 62, on special-law tracks such as BOI, the registrar must issue the permit within 7 days of receiving the notification, and the foreigner may work provisionally while it is being processed.