Work Permit in Thailand — How to Get One in 2025

THE FUNDAMENTAL RULE Work in Thailand without a work permit is a criminal offence — punishable by up to 5 years imprisonment and/or fine, and deportation, for the foreign worker. The employer is also liable. There is no grey area for "occasional" or "casual" work without a permit. Exception: remote work for overseas employers on a DTV does not require a work permit (the DTV authorises this work type). But work for any Thai entity always requires a work permit. THE TWO-STEP PROCESS: VISA FIRST, THEN WORK PERMIT STEP 1: OBTAIN A NON-IMMIGRANT B VISA The work permit process cannot start without the correct visa. You need a Non-Immigrant B (Non-B) visa, which is obtained at a Thai consulate abroad before arriving in Thailand. Your employer applies for a "visa support letter" from the relevant Thai authority (BOI, IEAT, or the Ministry of Labour) which you take to the consulate. STEP 2: ENTER THAILAND AND APPLY FOR THE WORK PERMIT Within 90 days of entering Thailand on the Non-B visa, you and your employer jointly apply for the work permit at the Department of Employment (กรมการจัดหางาน). WHO APPLIES: the employer applies on behalf of the employee. You attend in person for the work permit interview and photo. The employer''s HR or an authorised representative handles the document submission. EMPLOYER DOCUMENTS REQUIRED: - Company registration certificate (DBD — Department of Business Development) - VAT registration certificate - Audited financial statements (showing the company is financially viable) - List of Thai employees (establishing the 4:1 ratio — see below) - Work permit application form (บต. 1) - Job description and scope of work EMPLOYEE DOCUMENTS REQUIRED: - Passport (original) with Non-B visa stamp - Passport photos (2, white background) - Educational certificates (degree, diploma — sometimes required for professional roles) - Professional licences if applicable (medical, legal, engineering) - Health certificate from a Thai doctor (some offices require this) THE 4:1 RATIO RULE For most industries, Thai law requires that for every foreign worker employed, the company must have at least 4 Thai employees. A company with 4 Thai employees can have 1 foreign work permit. A company with 20 Thai employees can have 5 foreign work permits. Exceptions exist for BOI-promoted companies (which receive quota exemptions) and certain professional categories. RESTRICTED OCCUPATIONS — OCCUPATIONS FOREIGNERS CANNOT DO Thailand''s Alien Working Act reserves specific occupations exclusively for Thai nationals. The restricted list includes: - Driving and manual labour jobs (rice farming, salt farming, etc.) - Haircutting and beauty salon work - Tourism guide work (Thai-language) — English-language guides may have a separate permit - Secretary work - Civil engineering (certain categories) - Architecture (certain categories) - Certain retail and trading occupations These restrictions are not always enforced uniformly, but they are legally binding. BOI FAST-TRACK FOR PROMOTED COMPANIES Companies that have BOI (Board of Investment) promotion enjoy significantly streamlined work permit processing: - One-Stop Service at BOI OSS (Chamchuri Square, Bangkok) - Work permit issued in 1 business day at BOI OSS (vs 7–30 days at the Department of Employment) - Quota exemptions (4:1 ratio does not apply to BOI-promoted positions in many cases) - Online application system If your employer has BOI promotion, use the BOI OSS exclusively. SMART VISA WORK PERMIT Smart Visa holders (category T, I, E, or S) receive a simplified digital work permit at the time of visa issuance. No separate Department of Employment visit required for Smart Visa-sanctioned work. PROCESSING TIME Department of Employment: 7–30 business days. Speed varies by office and current workload. BOI OSS: 1 business day. ANNUAL RENEWAL Work permits are issued for 1 year and must be renewed annually. Renewal follows the same employer-led process. Failure to renew = illegal work from the day of expiry. CHANGING EMPLOYERS The work permit is tied to the specific employer. If you change employers, the old permit must be cancelled and a new one applied for through the new employer. You may not work for the new employer until the new permit is issued — this creates a gap period that requires careful management. HOW VISA CENTRE HELPS We assist with the Non-B visa application (employer letter preparation, consulate submission), coordinate the work permit application with the employer''s HR team, and handle BOI OSS applications for promoted-company employees. General guidance only. Work permit rules are established under the Alien Working Act B.E. 2551 and associated regulations. Requirements vary by occupation and company type. Not legal advice. No outcome guaranteed. Independent visa assistance agency; not affiliated with any government body.