Updated October 30, 2026.
A Non-Immigrant B visa and a Thai work permit are separate parts of an employment plan. The visa supports entry for the approved purpose. Work authorisation concerns the work you may perform under the applicable labour procedure. Permission to stay, shown by admission or extension records, has its own dates.
I would review those three records together before agreeing a first working day. A job offer, visa approval or HR email can be a necessary part of preparation without proving that every permission needed to start work has been granted.
Compare the records you will use
| Record | Main question it answers | Who normally handles the decision | What the applicant should check |
|---|---|---|---|
| Non-Immigrant B visa | Is the applicant granted this visa for the stated business or employment purpose? | Responsible Thai mission for an overseas application | Category, passport details, entries and validity |
| Admission stamp | Until when was the person admitted on this entry? | Immigration at entry | Entry date, category and permission end date |
| Work authorisation | Is the proposed work authorised under the relevant procedure? | Department of Employment or the applicable special process | Holder, employer and relevant authorised conditions |
| Extension of stay | Is more time granted under the stated basis? | Thai Immigration or the applicable coordinated process | New permission end date and any conditions |
| Employment contract | What have employee and employer agreed? | Contracting parties | Role, duties, pay and dates consistent with the applications |
The contract does not replace the government records. Equally, the visa’s expiry should not be substituted for the current permission end date when planning a renewal. Keep copies of the actual issued documents and give each its own calendar entry.
Start by describing the work
Write a plain description of the job, employer and workplace. Explain whether you will serve customers, manage staff, teach, install equipment, attend meetings or perform another activity. A title such as “consultant” can cover very different duties.
Give the same accurate description to HR and the people preparing immigration and labour submissions. If one letter describes a short business visit and another describes ongoing employment, resolve the discrepancy before filing. An application should not rely on a convenient label that conceals the actual work.
Some business activities are treated differently from ordinary employment under particular rules. Special authorisation processes also exist. The business visits and employment guide helps prepare an activity description for that review. Do not treat the word “business” in Non-B as permission to do any paid or unpaid task.
Standard employment: a practical sequence
An overseas route commonly begins with employer and applicant preparation, followed by the appropriate visa application. The labour-related evidence needed at that stage depends on the route and the mission. After entry, the employer and applicant complete the required work-authorisation process and plan any eligible extension before the admission expires.
The Royal Thai Embassy in Vienna’s Non-B employment guidance gives a concrete mission example: it identifies labour-approval evidence such as WP3, or a work permit for the stated renewal circumstances, alongside employer documents. Its checklist is an overseas-application checklist, not a promise that the same sequence covers every in-country case.
Use the following working sequence with the actual responsible authorities:
- Confirm the employer’s legal entity and the applicant’s proposed duties.
- Identify the immigration route and the work-authorisation route.
- Obtain the employer’s required supporting records and relevant labour approval for the visa stage.
- Submit the correct visa application through the responsible mission when using an overseas route.
- Check the visa decision, then inspect admission on arrival.
- Complete the work-authorisation step required before beginning the role.
- Assemble the extension evidence while there is sufficient lawful time remaining.
- Check each final permission and record renewal, reporting and travel tasks.
The order can change under an eligible in-country or special route. A diagram from another employer should be a question list until it has been matched to your own case.
Divide the documents between applicant and employer
The applicant generally controls personal identity and history. The employer controls institutional evidence and the accuracy of its employment statements. Relevant authorities issue approval documents; neither the applicant nor HR should fabricate a substitute.
| Responsibility | Typical preparation item | Review task |
|---|---|---|
| Applicant | Passport and required photograph | Current identity, readable pages and correct typed details |
| Applicant | Current location or immigration evidence | Consistent with the selected overseas or in-country route |
| Applicant | Qualifications and professional records where requested | Issuer, names and any translation or authentication requirements |
| Employer | Employment confirmation or contract | Real role, duties, salary and dates consistent across documents |
| Employer | Company registration and business evidence | Correct legal entity and requested certification or recency |
| Employer | Authorised signatory’s supporting identification | Person signing has the required authority and details |
| Employer and relevant authority | Labour approval or work-authorisation application | Correct route and relationship to the proposed employer |
| Applicant and employer | Extension pack | Current permissions, required financial or institutional evidence and appointment timing |
These are evidence categories. The responsible check
non b visa checklist
Use this guide to compare non b visa. Confirm non b visa against your current record. Keep a written record of non b visa and review non b visa before you submit documents.
list decides which documents must be submitted in your application. The employer document guide turns them into a tracking sheet.
Set a start date from issued permission
An employer may want a firm date for payroll, induction and customer commitments. Separate the desired start date from the date on which the required permission is actually confirmed. If a decision is pending, state that clearly in the staffing plan.
Ask HR who will provide evidence that the work-authorisation step is complete. A statement that paperwork has been sent is different from the issued authorisation or the applicable authority’s confirmation. Keep the relevant record accessible rather than relying on a message forwarded between several people.
If training, trial work or unpaid duties are proposed before the formal start, include them in the activity review. Calling a task an “orientation” does not establish its legal treatment. Identify what the person will actually do, who benefits and whether the activity needs authorisation.
Avoid promising a universal number of working days. Visa review, employer document production and labour processing have different dependencies. An application requiring a correction can shift the sequence even when the original travel date stays unchanged.
BOI employment follows its own coordinated process
A BOI-promoted company should identify the approved company, position and specialist procedure being used. The applicant should know which steps are handled through the company’s BOI system and which records remain necessary for immigration and employment purposes.
The BOI One Start One Stop Investment Center’s visa and work-permit guidance describes BOI-related processing and distinguishes work permission from the visa arrangements. Use the specific current instructions for the company’s case. A company saying it has investment promotion does not, on its own, show that the applicant’s position or permission has been approved.
Ask for a simple status summary: company approval, position approval where relevant, applicant approval, appointment requirements, and issued visa or work-authorisation records. If a step is not applicable, have the handling team explain why. This is more useful than trying to force the BOI case into a standard employer checklist.
Do not assume BOI, LTR and SMART routes have identical privileges or procedures. They are separate arrangements and need to be named accurately in the file.
Teachers need an additional institutional review
Teaching applications can require education-sector approvals, qualification evidence and professional licensing or permission in addition to visa and labour steps. The relevant institution and role matter. A university academic appointment and a school teaching role should not automatically receive the same document pack.
The school should identify the authority responsible for the role and which documents it will supply. The applicant should establish the required qualification and background-check evidence before ordering translations or booking travel. The teacher document planning guide covers that responsibility split.
A visa issued for teaching does not make a missing professional or work-authorisation step disappear. Ask the school to confirm the actual permission needed for classroom duties and when it will be obtained.
Changes after approval need another review
If the employer, role or workplace changes, check the current notification or authorisation procedure before performing the changed work. Do not assume that an authorisation arranged for one employer transfers automatically to another.
If your permission to stay relies on the employment, ending the job can affect the immigration record as well as the labour record. The consequences may extend to linked dependants. Review the termination date, new employer’s readiness and lawful-stay plan together. The changing employers checklist explains why cancelling one document is not a complete transition plan.
Passport renewals also deserve attention. Inform the handling team of the new passport and follow the required record-update process. Keep the link between old and new passports available wherever permission records have not yet been transferred or updated.
A hypothetical readiness check
Imagine a new employee has a Non-B approval and a flight booking. The employer has drafted the contract, but its labour submission is still being prepared. The employee’s planned Monday start therefore needs another decision: what permission is required before the actual duties begin, and when will evidence of that permission exist?
The employee sends HR the correct passport details, HR completes the employer documents, and the handling authority’s process is followed. The travel date can be reviewed independently from the first authorised working day. This hypothetical example avoids turning a visa approval into an unsupported claim that the employment process is finished.
Keep the employment file ready for renewal
Store the contract, employer letters, visa confirmation, entry stamp, work authorisation and extension records in labelled sections. Record the real expiry dates and name the person responsible for each renewal. Review the oldest required employer document before an appointment, since a complete file can contain an out-of-date registration extract.
Separate official charges from company document fees, translations and professional support. Ask what is included in any quotation and which authority decides each application. No service provider can replace the government’s decision with a contractual guarantee.
For practical assistance, see Visa Support Thailand’s work permit support and contact the team. Describe the role, employer type, present location and current permission date. If an offer or permission is pending, say which stage has actually been completed.