เปลี่ยนประเภทวีซ่าเป็นวีซ่า Non B (Non-Immigrant B) ต้องทำอย่างไร ?

How to Change Your Visa to a Non-B (Non-Immigrant B) Visa

27/01/2026

What Is a Non-B (Non-Immigrant B) Visa?

The Non-B (Non-Immigrant B) Visa is intended for foreign nationals who wish to enter Thailand for employment or business purposes in compliance with Thai law. It is commonly used for working with Thai companies as executives or specialists, or for business-related activities such as meetings, negotiations, or company establishment. The Non-B Visa is not a tourist visa, and employment is not permitted without a valid Work Permit. Typically, the visa is initially granted for 90 days and can be extended to one year. An extension must be applied for at least 30 days before the visa expires. Visa holders are also required to obtain a Work Permit and report their stay to the Immigration Office every 90 days.

Eligibility Requirements for Foreign Nationals Applying for a Non-B (Non-Immigrant B) Visa

Applicants must currently hold a Tourist Visa or a Transit Visa only. Other visa types, such as a Non-O Visa or any other categories, are not eligible for conversion to a Non-B Visa. If you are holding a different type of visa, you may consult FDI for further guidance and case-specific advice.
The visa must have at least 15 days of remaining validity before its expiration date.
The applicant must receive a salary that meets the legal requirements.

How Can a Non-B (Non-Immigrant B) Visa Be Applied For?

Applying from overseas before entering Thailand
Applying for a visa conversion within Thailand

Visa and Work Permit Application Process

Contact our officers to discuss your case and receive professional consultation immediately. Tel: (02) 642-6866, (02) 642-6869, (02) 642-6895 , Line ID : fdigroup
Our officers will issue a quotation, and payment for the service will then be processed. Payment can be made either in two installments, with 50% payable per stage, or in full prior to the commencement of the service.
Document Preparation Prepare all required documents accurately and in full accordance with the requirements, under the close supervision and support of FDI officers.
Visa application appointment Our expert team will schedule the visa submission appointment with the client. Our officers are able to communicate fluently in English, Japanese, Chinese, and Thai ensuring smooth and worry-free communication throughout the process.
Document submission will be handled with assistance from FDI’s team, who will support and guide clients through every step of the process with professional experience until completion.
Upon approval, an appointment will be scheduled for visa collection.

Did You Know? What’s the Difference Between a Business Visa (Non-B Visa) and a Work Permit?

Non-Immigrant B Visa

This is a document that allows foreign nationals to enter and stay in Thailand legally for business or employment purposes. It is issued by Thai embassies or consulates under the Ministry of Foreign Affairs. However, holding this visa alone does not grant permission to work; a valid Work Permit is also required before any employment can commence.

Work permit

This is a document that authorizes foreign nationals to work legally in Thailand. It is issued by the Department of Employment and clearly specifies details such as the job position, employer, and workplace.

Working in Thailand requires both a valid work visa and a work permit. If either one is missing, the employment will be considered illegal under Thai law.

You can speak with our expert team immediately to receive detailed service information, pricing, and a free initial consultation. We are ready to support you at any time contact us now.