We are delighted to guide you step by step through your Non-Immigrant B (Business) Visa process — from your first question to final visa approval. At SiamConsult, you will receive clear instructions, bilingual checklists, and continuous follow-up support to make every stage simple and stress-free.
Since 2009, we have assisted founders, teachers, and executives throughout Krabi, Phuket, Ao Nang, Koh Lanta, Phi Phi, and Phang-Nga to prepare eligibility documents, company registration filings, DBD paperwork, Immigration submissions, and Ministry of Labour applications — all handled with precision and care.
With proper company registration, supporting documents, and employment approval, you will be eligible to apply
for your Non-B Visa at a Thai Embassy or Consulate abroad, or extend it within Thailand when applicable.
SiamConsult ensures that your visa and work permit are reviewed, timelines are coordinated, and submissions are completed smoothly — so you can focus fully on your professional goals while living and working legally in Thailand.
IMPORTANT: Please do not work, accept salary, or perform any business activities in Thailand until your work permit is approved and issued by the Ministry of Labour.
From us to you — with pride, care, and dedication — welcome to your professional journey in Thailand, and thank you for your trust in SiamConsult.
There are two main categories:
• Non-B (Business Purpose): For company founders, investors, or business representatives who are not yet employed.
• Non-B (Employment Purpose): For foreign employees who already have a Thai employer and will apply for a work permit immediately after arrival.
The Non-Immigrant B Visa — often called the “Business Visa” — is the official Thai visa category for foreigners who wish to engage in business, investment, or employment activities in Thailand.
It allows you to enter and stay in Thailand legally while you set up a company, attend business meetings, explore partnerships, or apply for a work permit later.
This visa is the foundation of all professional and business activities in Thailand and is required before any foreigner can apply for a Work Permit.
There are two stages: the initial 90-day visa, and, once your company and documents are in order, a one-year extension, renewable every year.
Yes. This is very common for new entrepreneurs or investors who wish to start a company first. You are allowed to enter Thailand for business preparation — such as meeting lawyers, registering your company, or opening a bank account — before applying for a work permit.
A Non-B visa is issued for 90 days initially, allowing you to enter Thailand and begin your business or employment process.
After your company is registered, your tax ID is issued, and your business is active, you can apply for a one-year extension at the Immigration Office.
The one-year visa can be renewed annually as long as your business remains operational and your work permit is valid.
You’ll need to submit financial reports, tax filings, employee records, and office photos.
SiamConsult coordinates this process with Immigration and ensures your documents meet all conditions for a smooth one-year extension and re-entry permit.
SiamConsult assists with every stage — from your initial 90-day application to your yearly renewal — ensuring smooth transitions without overstays or interruptions.
Yes. We assist with full company registration, shareholding structures, tax registration, and payroll setup, ensuring compliance with Thai law.
The required documents depend on your case, but typically include:
Passport valid for at least six months
Visa application form and passport photos
Invitation letter from a registered Thai company or legal office (e.g., SiamConsult)
Company registration papers or a business plan
Bank statement or proof of sufficient funds
Lease agreement or proof of Thai business address
Evidence of planned or ongoing business activity (letters, contracts, etc.)
For employment-based Non-B visas, your employer also provides corporate documents, such as their DBD certificate, VAT registration, and shareholder list.
SiamConsult prepares and reviews all documents to ensure accuracy.
In most cases, first applications are made at a Thai Embassy or Consulate abroad. However, certain conversions from other visa types are possible inside Thailand with the correct paperwork. Conversion is feasible through the Immigration Bureau, provided you can present a valid business reason, such as company setup or employment.
You must submit a letter of invitation from a Thai company, evidence of capital, office lease, and other documents.
Once approved, Immigration cancels your Tourist Visa and issues your new Non-B Visa with a 90-day stay.
SiamConsult prepares the entire file and arranges your submission so you don’t need to travel abroad to apply.
Yes. We manage the full process — preparing immigration forms, liaising with authorities, and securing both your visa extension and work permit.
Yes. We act as your intermediary, preparing documents, booking appointments, and working directly with Thai authorities to save you time and stress.
Yes. Dependents (spouse and children) can apply for a Non-O Visa based on your Non-B Visa. SiamConsult also assists with these applications.
Thai Immigration rules change often and can be complex. With over 16 years of experience, SiamConsult ensures your visa or work permit is fully compliant, fast, and stress-free.
With 16 years of experience in accounting, law, and immigration, SiamConsult offers a one-stop solution. We combine legal expertise, local authority connections, and personalized service to make your visa and work permit process stress-free.
The required salary varies by nationality and job position. For example, most Western professionals must earn at least 50,000–60,000 THB per month. SiamConsult reviews your company structure and employment contract to ensure compliance with official labour regulations.
If employment ends, your visa and work permit must be canceled within seven days. SiamConsult assists with the cancellation process and can advise on other visa options (such as Non-O or LTR) if you plan to remain in Thailand.
The required salary varies by nationality and job position. For example, most Western professionals must earn at least 50,000–60,000 THB per month. SiamConsult reviews your company structure and employment contract to ensure compliance with official labour regulations.
Foreigners use the Non-B Business Visa for a variety of legitimate pre-employment or investment purposes.
Here are ten typical and accepted roles:
Company Founder or Investor – Starting a Thai limited company or investing in an existing one.
Business Consultant or Adviser – Conducting feasibility studies or market research.
Board Member or Shareholder – Overseeing company registration or shareholder meetings.
Negotiator or Representative – Signing contracts or negotiating business deals.
Property Developer or Project Manager – Supervising construction or real estate projects.
Franchise or Brand Representative – Exploring brand expansion in Thailand.
Business Visitor for Due Diligence – Visiting local partners or potential acquisitions.
Import / Export Founder – Registering trading and distribution activities.
BOI Applicant or Startup Planner – Preparing documentation for Thailand Board of Investment approval.
Incorporation Representative – Attending DBD, bank, or lawyer meetings for company setup.
These roles are fully recognized by the Thai authorities and commonly supported by SiamConsult’s invitation letters and company sponsorship.
Yes — this is one of the most common ways foreign entrepreneurs begin their journey in Thailand.
You may apply as a business visitor, investor, or company founder, before obtaining a work permit.
This visa is ideal if you plan to set up a new business, purchase an existing company, invest in real estate projects, or attend meetings with government offices.
During this stage, you are legally allowed to stay in Thailand, but you may not perform work duties.
Once your company registration is complete and Thai staff are hired, you can then apply for your Work Permit and extend your visa for one year.
No. You can apply first with an invitation from SiamConsult Account & Law Co., Ltd. or a local Thai partner, stating your intention to establish or invest in a business.
Once your visa is approved, you can remain in Thailand legally to complete registration with the Department of Business Development (DBD).
This approach is beneficial for foreign entrepreneurs who have not yet finalized partners, company names, or office locations.
These roles are fully recognized by the Thai authorities and commonly supported by SiamConsult’s invitation letters and company sponsorship.
You can:
Attend business meetings or sign documents
Negotiate with clients, suppliers, or government agencies
Visit potential business locations
Open a corporate bank account
Submit company registration and tax applications
Supervise setup or construction related to your investment
You cannot, however, perform daily work or receive a salary until your work permit is granted.
Processing time varies, but typically 4–6 weeks.
SiamConsult coordinates with Thai authorities to reduce delays and ensure a smooth process. Preparation of documents usually takes 3–5 working days.
Embassy processing generally requires 5–10 working days, depending on location.
For visa conversions inside Thailand, the Immigration review takes around 2–3 weeks. SiamConsult monitors every stage, coordinates directly with authorities, and keeps you informed through each step.
A Work Permit is the official license issued by the Ministry of Labor that legally allows a foreigner to perform specific duties for a specific employer in Thailand. It lists your job title, company, and authorized location of work.
You need a Work Permit as soon as you begin any form of employment or management activity within a Thai company — even if it is your own business.
Working without one is a criminal offence under Thai law and can result in fines of 5,000–50,000 THB, immediate deportation, and possible blacklisting. Employers who allow foreigners to work illegally face fines up to 100,000 THB per person.
SiamConsult ensures your company meets all requirements — including registered capital, Thai employee ratio, and valid visa — so your Work Permit is issued safely and fully compliant with the law.
Yes. Your spouse and children can apply for a Non-Immigrant O Visa (Dependent Type) based on your Non-B Visa.
They can stay in Thailand as long as your visa remains valid.
Dependents can also apply for a multiple-entry re-entry permit, ensuring they can travel in and out freely.
SiamConsult assists with the dependent visa documentation and extensions at the same time as your main visa.
To legally hire or assign a work permit to a foreigner, a Thai company must show:
2 million THB registered capital per foreign employee (or 1 million THB if married to a Thai citizen)
At least 4 full-time Thai employees per foreigner
A registered Thai office address
Paid taxes and Social Security contributions
Proof of business operations (invoices, clients, or contracts)
SiamConsult helps set up these structures from the start, ensuring your company qualifies for future foreign employment.
Because we transform Thai bureaucracy into clarity, confidence, and comfort.
With over 16 years of combined expertise in accounting, law, immigration, and corporate compliance, SiamConsult manages every stage of your visa, work permit, and company setup with precision and care. Avoid the common misstakes:
Submitting incomplete company documents
Applying for the wrong visa type (Tourist instead of Non-B)
Using unofficial invitation letters
Failing to maintain a proper capital or Thai staff ratio
Forgetting to renew the visa before expiration
These mistakes can cause delays or visa denial. SiamConsult reviews every file carefully, corrects all inconsistencies, and maintains communication with authorities to ensure approval the first time.
We prepare complete files, book appointments, communicate directly with authorities, and protect your compliance — allowing you to focus entirely on growing your business.
Our goal is to make your experience in Thailand not only successful but effortless and secure from day one.
