The Non-Immigrant “B” (Business) visa is the standard entry route for foreigners who intend to work or conduct business in Thailand. It’s not the work permit itself — rather, it is the immigration category that allows you to enter Thailand and complete the legal steps (notably the work-permit application) needed to actually perform employment or many types of commercial activities. This guide explains the purpose and types of Non-B visas, exact documentary expectations, realistic timelines and practical pitfalls, plus step-by-step workflows for applicants, employers and advisers.
Use a Non-Immigrant B if your objective is to:
take up paid employment in Thailand; or
conduct ongoing business activities that go beyond short business visits (long meetings, business setup, long-term projects).
Short business trips (meetings, conferences) typically use a tourist or business-visitor entry; the Non-B is for longer-term business presence and is the precursor to a Thai work permit. Official consular guidance makes this distinction clear.
Apply at a Thai embassy/consulate abroad → enter Thailand (90 days) → get work permit → change/extend visa to 1-year Non-B (in-country). After arrival on an initial Non-B entry (usually single-entry good for 90 days), once the employer secures a work-permit approval the foreign national may apply to Immigration in Thailand to convert or extend the visa to a 1-year multiple-entry Non-B tied to employment. Many practitioners follow this route.
Apply directly for a longer Non-B (multiple-entry / 1-year) if you meet embassy pre-approval conditions. Some embassies allow applications for a one-year multiple entry Non-B with prior approval or where the applicant previously held a Non-B; local embassy rules differ. Check the specific Royal Thai Embassy guidance where you apply.
While each Thai embassy/consulate can set local documentary preferences, the core requirements are consistent in official lists:
Valid passport (usually at least 6 months validity).
Completed visa application form and recent passport photo.
Letter of invitation or employment letter from the Thai company stating position, salary and purpose.
Company documents from the Thai employer: business registration, list of shareholders, registered capital and a cover letter describing the role. (Embassies commonly ask for these to verify the employer’s legitimacy).
Proof of funds (often cited as 20,000 THB per person / 40,000 THB per family for general non-immigrant applicants, but embassies will also require employer sponsorship for work cases).
For actual employment: pre-approval letters (if required) such as a Ministry of Labour WP3 form or evidence that the employer has filed for a work-permit application.
Any residence permit or local ID for the applicant’s country of residence (if applying outside home country).
Always consult the specific Royal Thai Embassy/Consulate checklist where you will apply — many embassies now require e-visa submissions through the official e-Visa portal.
Consular processing: timing varies by post and completeness of the file. Some embassies process Non-B applications in a few working days; others require several weeks where background checks are completed. Many embassies now ask that e-Visa forms be submitted at least 21 working days before travel.
Work permit window: after arrival on a 90-day Non-B the employer should apply for the work permit promptly — ideally within the first 30–60 days — because the 90-day entry is tight if unexpected holdups arise. Once a work permit is granted, the visa extension to a 1-year Non-B is usually straightforward if immigration papers are in order.
A Non-B visa alone does not authorize employment. The employer must typically:
file required labour documents and secure approvals (e.g., Ministry of Labour forms);
sponsor the work-permit application and provide company financial docs, job descriptions, and proof of need for a foreign hire; and
assist the employee with immigration extensions and 90-day reporting obligations.
Expect the employer to provide bank statements, company registration (DBD) extracts, VAT certificates and corporates’ financials when the labour office reviews the case. The precise documentary set differs by the job, the company’s capital and sector.
Once legally employed and on a one-year Non-B, the foreign national must comply with immigration rules: 90-day reporting (notifying Immigration of current address every 90 days while resident), timely visa renewals, and any requirements for departure/re-entry stamps depending on the visa type. Non-compliance draws fines, record flags and possible visa revocation. Many employers either register the employee with a local immigration lawyer or use immigration service providers to calendar these events.
Arriving with the wrong visa type. Do not start work on arrival unless both a valid Non-B and a work permit are in place.
Insufficient employer documentation. Consular posts scrutinize the Thai company’s substance; weak or incomplete company files often lead to refusal. Obtain an embassy-specific checklist before filing.
Leaving legalization/translation late. If your employer’s documents are in Thai or English only, ensure certified translations and notarizations follow embassy rules where applicable.
Ignoring 90-day reporting and address updates. These are enforceable; assign responsibility clearly (employee vs employer).
Confirm which Thai embassy/consulate processes your Non-B and whether e-Visa submission is mandatory.
Gather: passport (≥6 months), photo, completed form, employer invitation/cover letter, company DB-D extract, proof of funds and any residence permit from the country of application.
Employer prepares: cover letter, business registration, shareholder list, tax documents and justification for hiring a foreigner.
Plan for 90-day arrival → work-permit filing → in-country 1-year visa extension; allow 4–8 weeks for work-permit approvals in normal cases.
Set up an immigration calendar for 90-day reports, passport/visa expiry and re-entry needs.
Thailand’s Non-Immigrant B regime is procedurally robust but administratively detailed: the visa is simply the start of a process that must be completed with a work permit, employer sponsorship and strict immigration compliance. Work closely with the hiring company and an experienced immigration adviser to line up embassy-specific documentation, meet labour-office requirements and keep to reporting deadlines — that combination is the most reliable way to turn a Business (Non-B) entry into lawful, long-term employment in Thailand.
Visit our website for more information: https://www.siam-legal.com/thailand-visa/business-visa-thailand.php