Thailand's restricted occupations for foreign workers

The reserved-occupations concept

The framework descends from decades-old royal decrees listing occupations prohibited to foreigners, originally 39 to 40 activities, restructured in recent years into tiers: work absolutely reserved for Thais, and work foreigners may do only under conditions such as international agreements or skilled-worker arrangements. The policy logic is labour protection and cultural preservation, and the list reads accordingly: it protects trades, crafts and services historically identified with Thai livelihoods, not modern professional management.

What foreigners cannot do

The absolutely reserved tier includes, in general terms:

• Manual labour and general unskilled work, with narrow exceptions under migrant-labour agreements with neighbouring countries.
• Traditional crafts and cultural trades: wood carving, Thai musical instrument making, nielloware, goldsmithing and silverware, lacquerware, Thai doll making, alms bowl making, silk weaving by hand and similar crafts.
• Service trades: hairdressing and beauty work, Thai massage, driving motor vehicles for hire, tour guiding, street vending and market stall trading, auctioneering.
• Office and commercial roles: secretarial and clerical work, legal services and litigation (with limited exceptions for arbitration and licensed foreign-law advisers), brokerage in certain forms, and accounting and auditing work below defined professional exceptions.
• Agricultural work, animal husbandry, forestry and fishery labour, with exceptions for specialised or managerial roles.

The relaxed tier permits certain skilled trades, such as some construction and craftsman roles, under specific conditions. Professions governed by their own licensing regimes, medicine, engineering, architecture, sit under additional professional-council rules on top of the occupations list.

How lawful roles are drafted

The list prohibits activities, not job titles, and work permits are issued against a described scope of duties. Lawful drafting therefore describes what the foreigner genuinely does at the level the law addresses. A foreigner cannot hold a permit as a secretary, but can as an executive coordinating international correspondence; cannot cut hair, but can direct and train in a salon business; cannot sell in a market stall, but can manage a retail company's operations. The line is not cosmetic relabelling: duties on the ground must match the permit's description, because labour inspections compare reality with paper. Sound practice keeps the described duties managerial, advisory or technical, keeps prohibited activities with Thai staff, and documents the division. This drafting is done at application stage, since a permit scope, once issued, defines what is lawful.

Working outside the scope of an existing permit is an offence in itself, not merely a technicality. A permit for one role at one company does not cover a second directorship, a side consultancy or hands-on work the description never mentioned.

Grey areas worth naming

• Directorship without a permit: holding shares or a directorship is not itself work, but signing daily operational documents, managing staff or dealing with customers is. Directors who are genuinely passive should behave that way on paper and in the office.
• Remote work for foreign clients: tolerated in practice on appropriate visas and expressly contemplated by the DTV and parts of the LTR, but it does not license any activity serving the Thai market from Thai soil.
• Volunteering: unpaid does not mean unregulated. Volunteer work generally requires its own permit through a registered foundation; helping in a friend's business for free is simply unpermitted work.
• BOI and One Stop channels: promoted companies obtain permits through a faster, more flexible channel, but the reserved occupations list still applies. Promotion changes the process, not the prohibition.

Penalties

Under the current foreign-worker decree, a foreigner working without a permit, or in a prohibited occupation, faces fines typically cited in the range of 5,000 to 50,000 baht, deportation, and a bar on new permits for a period after conviction. Employers face heavier exposure: fines commonly cited at 10,000 to 100,000 baht per foreign worker for a first offence, rising steeply with criminal liability and hiring bans for repeats. Immigration consequences travel with the record: a work-related offence complicates every future extension, and is poison to long-horizon applications such as permanent residence.

Getting it right from the start

Most violations we see were never intended: a role that drifted from its permit, a director who assumed ownership equalled the right to work, a spouse helping in a family business. The cure is structural, not defensive: scope the permit correctly at the outset, align the visa, the permit and the company's capital and staffing ratios, and revisit the description when the role actually changes. This office handles that alignment as part of any client's business establishment in Thailand, quietly and before it is ever tested.

This briefing is general information, not legal, tax or investment advice. Thai rules change frequently and individual cases differ. Verify current requirements with the relevant authorities, including the Immigration Bureau, the Board of Investment, the Land Department, the Department of Business Development and the Revenue Department, and take advice on your own facts before acting.