Introduction
If you’re hiring foreign talent in Thailand (or relocating an existing team member to Thailand), the Non-Immigrant “B” visa for employment is usually the starting point — but it’s often misunderstood.
Two things are true at the same time:
- The Non-Immigrant B visa is what allows the employee to enter Thailand for work purposes.
- The employee must still obtain a work permit before starting work in Thailand. Thailand’s Ministry of Foreign Affairs (MFA) explicitly notes that a holder wishing to work must be granted a work permit before starting work.
Where companies run into trouble is not the “big idea”—it’s the details: which documents the employer must prepare, how WP3 works, what embassies want, and what happens after arrival (work permit, extensions, 90-day reporting, re-entry permits).
This article gives you a checklist-style playbook for 2026, split into:
- Employer Requirements
- Employee Requirements
- and post-arrival compliance (so the employee stays legal and operationally smooth)
1. Quick Overview: What the Non-Immigrant “B” Is?
What it is
Thailand’s MFA describes Non-Immigrant Visa Category “B” as issued to applicants who wish to enter the Kingdom to work or conduct business.
What it isn’t
- It is not the work permit. You still need a work permit issued by Thailand’s Ministry of Labour before starting work.
- It is usually not a 1-year stay by default. MFA notes the holder is entitled to stay up to 90 days and can apply for an extension of stay (commonly 1 year) at Immigration.
Visa fee
MFA lists visa fees as 2,000 THB for single-entry (three-month validity) and 5,000 THB for multiple entries (one-year validity).
2. The Standard Process: From “Offer” to “Legal to Work”
Here’s the typical journey most employers follow:
Step 1 — Employer prepares the “approval pathway”
For employment, MFA states applicants must provide a letter of approval from the Ministry of Labour, and that the prospective employer in Thailand must submit Form WP3 at the Department of Employment / Provincial Employment Office to obtain it.
The Department of Employment also publishes WP.3 documentation guidance and required document ordering.
Step 2 — Employee applies for Non-Immigrant B visa at a Thai Embassy / Consulate
MFA notes that foreigners who wish to work must apply for a Non-Immigrant Visa at Royal Thai Embassies / Consulates-General.
Many locations use the official Thailand e-Visa platform operated by the MFA.
Step 3 — Employee enters Thailand
MFA notes initial stay permission is typically up to 90 days, and then an extension may be granted.
Step 4 — Work permit application + issuance
MFA explicitly highlights the requirement: Non-Immigrant B holders can work once granted a work permit and warns about penalties for working without one.
Step 5 — Extension of stay + ongoing reporting
MFA notes the employee may apply for an extension of stay at the Immigration Bureau (often up to one year from first entry).
Step 6 — Re-entry permit planning (if traveling)
Some Thai missions remind that if you leave Thailand without a re-entry permit, your stay permission may be void — so travel planning matters.
3. Employer Checklist: What You Must Prepare
Below is the employer-side checklist aligned with MFA’s employment document requirements plus embassy document patterns.
A) Employer core documents
MFA lists corporate documents of the hiring company that are typically required, such as:
- business registration / business license
- list of shareholders
- company profile
- details of business operations
- list of foreign workers (names, nationalities, positions)
- company location map
- balance sheet + tax filings
- VAT registration
Many embassy checklists echo a similar set — e.g., the Royal Thai Embassy Manila e-Visa guidelines reference the employer letter, business registration, employment contract, and company tax declaration.
Employer Checklist (Documents Packet)
- Company registration certificate / business registration
- Shareholder list
- Company profile + business activity summary
- Map of office location
- Latest corporate tax filings as applicable
- VAT registration
- List of foreign workers currently employed (if requested)
B) Employment / role documents
MFA requires (for work-purpose applicants) a Ministry of Labour approval letter obtained through WP3 submission by the employer.
Embassies commonly ask for an employer invitation / cover letter that states job details (position, salary, contract period). Example: Royal Thai Embassy Kuala Lumpur’s employment page specifies a cover letter detailing name, position, salary, employment period, and visa type.
Employer Checklist (Role Packet)
- Offer letter / employment contract (signed)
- Employer cover letter / request letter to the embassy (role, salary, duration)
- WP3 / Ministry of Labour approval letter (or the relevant pre-approval document required by the mission)
C) WP3 Checklist
MFA notes WP3 is submitted by the employer to the Department of Employment / Provincial Employment Office to obtain the approval letter for visa application. The Department of Employment provides WP.3 form guidance and indicates it’s a core document with a specified order of required documents.
Employer WP3 Checklist
- Identify correct filing office (Department of Employment or Provincial Employment Office)
- Prepare WP3 form and supporting documents per DOE guidance
- Ensure job title, work location, and employer details match the offer letter and visa cover letter (consistency matters)
- Keep a clean “visa packet” copy set ready for the employee (PDF scans, signed and sealed where needed)
D) Capital & “company readiness” expectations
Some Thai missions include explicit capital guidance for general employment cases (for example, the Kuala Lumpur embassy page references company registration / capital expectation in its checklist).
Practical Guidance
- Treat capital / headcount / financial readiness as embassy- and case-specific checks.
- If your company is newly set up, expect more scrutiny and be ready with stronger supporting documents.
4. Employee Checklist: What the Employee Must Prepare
A) Basic application requirements
MFA lists these baseline requirements for work applicants:
- Passport with validity not less than 6 months
- Completed application form
- Recent passport photo (4 x 6 cm) within past 6 months
- Evidence of adequate finance (20,000 THB per person / 40,000 THB per family)
Employee Checklist (Baseline)
- Passport (≥ 6 months validity)
- Completed visa application (online via Thai e-Visa if applicable)
- Passport photo meeting mission specs
- +Proof of funds (as required)
B) Employment-specific requirements
MFA includes:
- Ministry of Labour approval letter (WP3-based)
- Corporate documents of hiring company (see employer packet)
Employee Checklist (Employment Packet Submission)
- Ministry of Labour approval letter (via employer WP3 process)
- Employer cover letter (job details)
- Company registration docs + shareholder list + tax/VAT docs (as required by mission)
- Employment contract / offer letter
C) If the employee previously worked in Thailand
MFA notes additional items may be required in that case, such as a copy of the work permit and Thai personal income tax return.
Employee Checklist (if previously employed in Thailand)
- Copy of prior work permit (if applicable)
- Thai personal income tax filing evidence if applicable
5. Post-Arrival Compliance Checklist
This is where many companies get surprised: the visa is not the end — Thailand has ongoing compliance steps.
A) Work permit before work starts
MFA is explicit: work permit must be granted before working; violations can be prosecuted.
Post-Arrival Checklist
- Schedule work permit application immediately after entry (timing depends on your case)
- Ensure job title, work location, and employer details match visa documents (consistency)
- Do not start work (including “productive work”) until work permit is issued
B) Extension of stay (often 1 year) + planning travel
MFA notes the Non-Immigrant B holder may apply for extension of stay at Immigration and may be granted a one-year extension from first entry. If the employee needs to travel during the permission-to-stay period, re-entry permit planning matters (some missions warn that leaving without a re-entry permit can void the stay).
Post-Arrival Checklist
- Prepare extension-of-stay timeline early (don’t wait until the last week)
- If traveling internationally, confirm re-entry permit requirements before departure
C) 90-day reporting (for long stays)
Thailand requires foreigners staying longer than 90 days to report their residence periodically. An official Immigration regional office page states that an alien staying more than 90 days must report every 90 days; it also notes reporting windows (before 15 days or after 7 days from due date).
90-Day Reporting Checklist
- Track 90-day due dates in HR / ops calendar
- Submit report within the permitted window (per Immigration office guidance)
- Keep confirmation / receipt on file
6. Common Mistakes
Mistake 1: Employer documents aren’t signed / sealed correctly
MFA notes company document copies should be signed by authorized director / MD and affix the company seal.
Missing signatures / seals is a classic “request for additional documents” trigger.
Mistake 2: Inconsistent job details across documents
You can expect delay if the job title or salary differs between:
- employer cover letter,
- employment contract,
- WP3 / work permit paperwork.
Mistake 3: Applying at the wrong mission / without residency proof
MFA recommends applying in the country where the applicant has residence.
Many missions also ask for local residence permits if you’re applying outside your nationality country.
Mistake 4: Starting work before the work permit
MFA clearly warns about working without a work permit under Thai law.
Mistake 5: Forgetting travel rules (re-entry permit)
If the employee travels and the stay permission is voided, it can create urgent rework and business disruption.
7. Practical “Aster Lion” Tips to Make This Smooth
Build a single “master visa packet” (PDF folder)
- 01_Passport
- 02_Photo
- 03_Employer_Letter
- 04_Employment_Contract
- 05_WP3_Approval
- 06_Company_Registration
- 07_Tax_VAT_Docs
This reduces chaos when embassies request resubmissions.
Set internal deadlines
- Employer to complete WP3: target within X business days
- Employee to submit e-Visa: within 48 hours of receiving packet
- Post-arrival work permit filing: within first 7–14 days (case-dependent)
Keep scope discipline
If the employee’s role changes significantly, update the work permit / extension plan early.
Treat 90-day reporting as an HR compliance task
Put it in your HRIS / calendar with reminders. Use the reporting window guidance from Immigration office sources.
Conclusion
The Non-Immigrant B visa for employment is a well-established pathway—but success depends on coordination between the employer (Thailand-side corporate and WP3 steps) and the employee (application accuracy and post-arrival compliance).
Use this checklist approach:
- Employer prepares a complete, signed / sealed document set and completes the WP3 / approval steps where required.
- Employee applies via the correct Thai mission (often through Thai e-Visa) with consistent documents.
- After arrival, the employee obtains the work permit before starting work, plans extension timing, and follows 90-day reporting rules.
Navigating the visa application process and staying compliant with tax and labor regulations can be complex. For expert guidance, book a free consultation with Aster Lion to ensure a seamless transition to long-term residency in Thailand.