A Thai work permit is separate from your visa stamp — you need both aligned to work legally for a Thai employer. Immigration issues Non-B (or category-specific) permission; the Department of Employment processes the permit booklet tied to one employer, one job description, and one location.
Visa + permit: two layers
| Document | Who issues | Purpose |
|---|---|---|
| Non-B visa | Thai embassy / Immigration | Entry and stay category |
| Work permit | Department of Employment | Legal work for named employer |
| Extension of stay | Immigration | Annual renewal linked to employment |
Without a valid permit, performing work in Thailand — even unpaid consulting onsite — can trigger fines, detention, and deportation.
Related: Non-B work visa guide · Tax ID for foreigners
Standard employer-sponsored path
- 1
Job offer from Thai-registered company
Company must meet capitalization and Thai staff ratio rules unless BOI-promoted.
- 2
Non-B visa at embassy
Submit offer letter, company docs, passport, photos — timing varies by post.
- 3
Enter Thailand and report
Employer initiates work permit application within statutory window after arrival.
- 4
Work permit issuance
Receive blue booklet listing position, employer address, and expiry.
- 5
Immigration extension
Extend stay to match employment — typically one year — at provincial Immigration.
- 6
Annual renewal cycle
Renew permit with HR, then extend visa before permit expiry — miss dates and both lapse.
Warning
Your permit authorises one employer only. Side gigs, freelance clients in Thailand, or teaching at a second school without amendment are violations.
Documents employers typically collect
Foreign employee file
- Passport biodata and Non-B pages
- Degree certificates and transcripts (apostille/legalisation may apply)
- Resume/CV matching job description
- Medical certificate (some employers)
- Passport photos — Thai spec
- Thai address and TM.30 receipt
- Marriage certificate if using spousal support docs
HR quality varies — expats in Bangkok often use employer legal teams; smaller provinces need patience.
BOI and promoted companies
Board of Investment promoted firms enjoy streamlined permits and visa lanes for skilled roles. Smart visa and LTR categories overlap but are not automatic work permission — read category terms.
Compare long-stay routes: DTV vs LTR · LTR visa guide
Changing jobs
Switching employers requires cancelled old permit and new application — you cannot silently transfer. Gap days between employers can affect extension eligibility; plan with both HR departments.
Tax ID and social security
Employers register employees for social security (SSO) where applicable. Foreigners need a Tax ID (TIN) for payroll — HR usually files; self-follow-up via Tax ID guide.
Remote work without Thai employer
| Status | Typical rule |
|---|---|
| Tourist / exemption | No local work |
| DTV | Remote foreign employment only — no Thai clients |
| Non-B + permit | Work for sponsoring employer only |
| LTR WFT category | Defined remote rules — verify BOI terms |
Hub: DTV complete guide
Penalties for working without permit
Fines up to ฿100,000, imprisonment terms, deportation, and blacklist entries appear in enforcement cases. Immigration audits at language schools and agencies occur — verify employer legitimacy before relocating.
Overstay intersects harshly — overstay guide
Practical expat tips
- Keep permit booklet dry and on person during work hours when required
- Before vacation, confirm re-entry permit if on single-entry
- File 90-day reports — employment does not exempt TM.47 — task hub
- Bank accounts: work permit often unlocks branch acceptance — banking guide
Interactive tools
Visa Expiry Calculator
Enter your entry date and permitted stay to see your visa expiry date and days remaining.
Stamp dates, visa conditions, and extension approvals vary. Always check your passport stamp, 90-day reporting obligations, and official immigration records.
Frequently asked questions
Can I work while permit is processing?
No — start date must follow issuance unless HR confirms a legal training exemption — rare.
Does marriage to a Thai grant work rights?
Marriage supports Non-O family visa — not automatic work permit. Employer sponsorship still required.
Can I volunteer without permit?
Unpaid onsite work for organisations can still require permission — confirm with employer counsel.
How long does issuance take?
BOI routes: days to weeks. Standard companies: several weeks. Provincial offices vary.
