Written by the Thai Legal & Immigration legal team · Last reviewed · Editorial policy
The Non-Immigrant EX classification is intended for qualifying expert or specialist assignments. Seniority, professional experience or an overseas consultancy contract does not alone establish eligibility: the assignment, Thai host and any required authority certification must support the category.
Many technical specialists instead use Non-B, BOI-supported, SMART or LTR arrangements. We compare the actual duties and sponsoring framework so that a specialist title is not mistaken for a universal alternative to ordinary employment requirements.
What we handle
- Assess the specialist role against available categories.
- Review qualifications and evidence of relevant expertise.
- Confirm host support and required endorsements.
- Coordinate immigration and work-authorisation planning.
How the process works
Step 1
Role analysis
Define duties, assignment duration and the Thai beneficiary.
Step 2
Route confirmation
Check EX availability and requirements with the competent authority.
Step 3
Evidence filing
Prepare credentials, host records and assignment documentation.
Step 4
Compliance
Check permission to perform the duties and review later changes.
Not sure this route fits you?
Get a Free Preliminary Eligibility Review from our licensed team.
Why are applications refused, and how do we prepare?
| Common refusal reason | How we prepare |
|---|---|
| Expert status is asserted without sufficient assignment support | We link qualifications and specialist experience to the Thai host's documented project. |
| The assignment belongs under another employment framework | We compare EX with Non-B and relevant BOI-supported routes before filing. |
Counsel's note
Do not begin consulting, installation or technical supervision merely because the assignment is short. The activity's work-authorisation position must be checked separately.
Frequently asked
Does being a consultant automatically qualify me for EX?
Should a BOI-company expert always apply for EX?
Why clients choose us
Six licensed Thai attorneys
Including Notarial Services Attorneys registered with the Lawyers Council of Thailand.
77 provinces covered
Offices in Bangkok and Khon Kaen with field representatives nationwide.
Your passport stays with you
We work from copies and only handle originals for filings you approve.
Honest assessment first
A Free Preliminary Eligibility Review tells you your options before any engagement.
Sources & references
- Thai e-Visa — checked 2026-11-03
- Ministry of Foreign Affairs — checked 2026-11-03
- Thailand Board of Investment — checked 2026-11-03
- Department of Employment — checked 2026-11-03
General information only, not legal advice. Immigration decisions rest with the Thai authorities. See our disclaimer.