Work permits, in outline

A visa or extension of stay and a work permit are two separate documents issued by two different authorities, and confusing them — or assuming one covers the other — is one of the most common legal mistakes foreigners make in Thailand.

Who needs a work permit

• Almost any activity that could be considered “work” under Thai law — broadly interpreted, and not limited to paid employment — generally requires a work permit, issued by the Department of Employment.
• This includes activities some foreigners assume are exempt: unpaid volunteer work in some contexts, running your own Thai company, and even certain online or remote work performed while physically present in Thailand can raise work-permit questions depending on the specifics.
• Working without a valid work permit is a criminal offence for the worker, and separately exposes the employer to penalties — see criminal matters.

How a work permit is generally obtained

A standard work permit application generally requires an eligible visa category already in place, a Thai employer meeting capital and staffing requirements (including a ratio of Thai employees to each foreign work-permit holder, unless the employer is specifically exempted, for example through BOI promotion), and documentation of the role and qualifications. BOI-promoted companies and certain other categories — including Thailand’s digital and long-term visa programmes — can face relaxed requirements; see business & foreign ownership.

The link to your visa status

Because a work permit generally depends on an underlying valid visa or extension, and many visa extensions in turn depend on maintaining valid employment, the two documents are more tightly linked than their separate application processes suggest. A few consequences that catch people out:

• Losing your job can jeopardise a visa extension that was based on that employment, not just the work permit itself.
• A work permit can be cancelled by the employer — sometimes unilaterally, including in a dispute — which then puts the underlying visa status at risk even if the worker did nothing wrong.
• Changing employers, or taking on a second job, generally requires updating or reapplying for work-permit authorisation before starting, not after.

The digital work permit and e-Work Permit systems

Thailand has moved parts of the work-permit process online in recent years, streamlining renewal and reducing some in-person visits to the Department of Employment. The underlying legal requirements have not fundamentally changed, only how the paperwork is submitted — do not assume a faster online process means fewer substantive requirements.

If a work permit dispute arises

Where an employer cancels a work permit as leverage in an employment dispute, or refuses to cooperate with a renewal, the employee generally has both an employment-law angle (see employment & labour law) and an immigration angle (see visas & immigration) to address at the same time, and the two often need to be handled together rather than sequentially, given how quickly a lapsed permit can affect visa status.