TL;DR
- A Thai work permit is tied to a specific employer, location, and role. Moving an employee between offices or provinces without updating the permit is a compliance violation.
- The recommended approach is to issue the work permit under the company's head office, allowing assignment to any branch without a separate transfer process each time.
- The Thai-employee-to-foreign-employee ratio (four Thai nationals per foreign worker) applies at the entity level and must be maintained [5].
- Province-specific rules vary. Always check with the immigration office in the province where the employee will actually be based.
- Issa Compass supports businesses in structuring compliant work permit applications, including corporate onboarding and permit management.
Why Does Moving an Employee Between Thai Offices Trigger a Compliance Issue at All?
Thai work permits are not portable documents. Under Thai labor law, a work permit specifies the employer, the permitted work location, and the type of work the foreign national is authorized to perform [3]. This is fundamentally different from, say, a European work authorization that follows the worker. In Thailand, the permit is anchored to a specific context. If any part of that context changes, and the permit is not updated to reflect it, the employee is technically working without authorization for the new arrangement.
This catches HR teams off guard because internal transfers feel like an administrative matter rather than an immigration matter. The employee has not changed companies. They have not left the country. But in the eyes of Thai immigration and the Department of Employment, they may now be working in an unauthorized capacity [1].
Common scenarios that create this problem:
- Relocating an employee from a Bangkok head office to a branch in Chiang Mai or Phuket
- Assigning an employee from one subsidiary to a sister company under the same group
- Moving an employee temporarily to support a provincial project without updating their permit details
What Is the Head Office Strategy, and Why Does It Matter?
Building on the compliance risk above, the most practical way to manage this is to structure the work permit correctly from day one. The recommended approach is to apply for both the visa and the work permit through the company's head office, not a branch office.
Once the work permit is issued under the head office, the foreign employee can be assigned to work at any of the company's branch locations without needing to initiate a separate transfer process for the visa or the work permit each time a posting changes. The head office holds the permit; the employee's physical deployment is a business decision within that structure.
This approach is especially valuable for businesses that operate across multiple provinces, run regional offices, or need flexibility in how they deploy international talent over time [1].
| Approach | How It Works | Key Trade-off |
|---|---|---|
| Apply through a branch office | Permit is tied to the branch entity and location | Transfer process required every time the employee moves to a different branch or province |
| Apply through the head office | Permit is held by the head office; employee can be deployed to branches | Requires head office to meet staffing ratios; cleanest path for multi-location businesses |
What Is the Four-to-One Staffing Ratio Rule, and Where Does It Apply?
A frequently misunderstood compliance rule concerns the ratio of Thai employees to foreign employees a company must maintain. For most standard Thai company registrations, the requirement is four Thai nationals employed for every foreign work permit holder [5]. This ratio applies at the entity level, meaning the company holding the work permit must demonstrate it meets the threshold.
HR teams planning to issue permits through the head office need to confirm that the head office entity, on its own, meets the four-to-one ratio. Counting employees across branches or subsidiaries as a combined pool generally does not satisfy the requirement unless those employees are formally employed by the same legal entity [5].
Points to verify before applying:
- The number of Thai employees on the payroll of the specific entity holding the permit
- Whether existing foreign permit holders at that entity already consume part of the ratio allowance
- Whether the company's registration type has different ratio requirements (BOI-promoted companies, for example, operate under a different framework)
Do Province-Specific Rules Affect the Transfer?
Stepping back from the entity-level rules, a separate concern is how individual provincial immigration offices interpret and administer these requirements. Each Thai province sets its own procedures for work permit applications and renewals. Document checklists, processing timelines, and officer discretion can differ meaningfully between Bangkok, Chiang Mai, Pattaya, and other locations.
If a foreign employee is being moved to a province different from where their current permit was issued, the HR team should contact the immigration office of the destination province before initiating the change. Do not assume the process that worked in one province will work identically in another [2].
What Happens to the Visa When the Work Permit Changes?
A related but distinct question is what happens to the employee's Non-Immigrant B visa when their work permit situation changes. The Non-B visa and the work permit are two separate but connected legal statuses. The standard process requires obtaining a Non-B visa first, then applying for the work permit after entering Thailand [6].
When a transfer involves changing the employer entity on the work permit, the employee may need to apply for a new Non-B visa rather than simply amending the existing one. You can apply for a new visa after the current visa has expired, or you can cancel the existing visa before applying for the new one. HR teams should plan for this possibility rather than treating it as an edge case [2].
The E-Work Permit system in Thailand has introduced online processes for some permit amendments, but manual submissions remain accepted for many scenarios as procedures continue to evolve [4]. Confirming the current submission method with the relevant authority or a qualified immigration professional before proceeding is advisable.
---Frequently Asked Questions
Can a foreign employee work at multiple Thai offices on a single work permit?
Generally, a work permit specifies a work location. If the permit is issued through the head office, the employee may be deployed to branches within that company structure. However, working simultaneously across multiple separate legal entities requires separate permits for each entity. Confirm the specific arrangement with the issuing authority.
Does the four-to-one Thai employee ratio apply per branch or per company?
The ratio applies at the level of the legal entity holding the work permit [5]. A head office and its branches may be treated as separate entities. HR teams should verify the ratio against the specific company registration that will hold the permit.
If an employee transfers provinces, do they need a new work permit or just an amendment?
This depends on whether the legal employer entity changes and which provincial office is involved. An amendment may suffice in some cases; in others, a new permit application is required. Always consult the immigration office in the destination province before acting [2].
Can an employee continue working during the transfer process?
There is a documented process for changing jobs and work permits that includes specific timelines [2]. Working without a valid, current permit is a violation. HR teams should ensure continuity of authorization is maintained throughout the transition period.
What is the E-Work Permit system in Thailand?
The E-Work Permit system is Thailand's Department of Employment initiative to move work permit applications and related processes online. While online submission is becoming the standard, the system has undergone phased rollouts and temporary manual submission allowances remain available for some cases [4].
Does the same rule apply when transferring employees within a BOI-promoted company?
BOI-promoted companies operate under a different regulatory framework, including different staffing ratio rules and permit processing pathways. Transfers within BOI structures should be handled through the BOI's own channels and are not covered by standard Department of Employment procedures.
How far in advance should HR teams start planning an inter-office transfer for a foreign employee?
Given that processing timelines vary by embassy, visa category, and provincial office, planning well in advance is critical. Issa Compass's licensed immigration consultants can provide timeline estimates based on your specific situation. For an accurate timeline specific to your situation, check the Issa Compass app for current estimates.
Issa Compass is a visa services platform dedicated to simplifying Thai immigration for individuals and businesses. The platform's licensed immigration consultants ensure applications are accurate and fully compliant before submission. Issa Compass specializes exclusively in Thailand visa application services and related legal documentation support, assisting clients with Non-B visa applications once employment has been secured. The company also backs qualified applications with a money-back guarantee: a full refund of both the government fee and the service fee if an pre-qualified application is not approved by immigration authorities.
Managing foreign employees across Thai offices?
Structuring work permits correctly from the start saves significant time, cost, and compliance risk later. The Issa Compass team can help you plan the right approach for your business structure and provincial context.
References
- Thailand: Moving Foreign Employees to Work in Thailand | Insight | Baker McKenzie (www.bakermckenzie.com)
- Foreigners Changing Jobs in Thailand | Non-B Visa (2026) (rlcoutsourcing.com)
- E-Work Permit Thailand: Complete Guide (benoit-partners.com)
- Thailand: Mandatory Online Work Permit and Foreign Worker Registration System Forthcoming | Fragomen, Del Rey, Bernsen & Loewy LLP (www.fragomen.com)
- Thailand Work Permit Requirements 2026 | Foreign Guide (bangkokbusinessclub.com)
- Non-Immigrant Visa B (for Business and Work) - (www.mfa.go.th)
