Thailand Work Permit for Foreigners — 2026 Complete Guide

What a Thailand work permit actually authorizes

A Thai work permit is a job-specific, employer-specific and location-specific authorization issued under the Foreign Working Act B.E. 2551 (and the 2017 Emergency Decree on the Management of Foreign Workers' Employment). It is not a permit to 'live and work' generically — it lists the exact job title, the exact employer, and the exact business addresses where the foreigner may perform duties. Working outside any of those three parameters is illegal even with a valid permit.

A separate visa — Non-Immigrant B for most employees, Non-Immigrant IB for BOI-promoted companies, Non-Immigrant O for the spouse of a Thai national — is required to enter and remain in the country while the work permit is active. The two documents are administratively independent but practically inseparable: cancelling one effectively voids the other.

The two-track system — BOI vs non-BOI

Whether your employer holds a Board of Investment (BOI) promotion certificate determines almost every parameter of your work permit application, from capital requirements to processing speed.

• Non-BOI route — THB 2 million registered and paid-up capital per foreign employee; four Thai employees per foreigner; processing at the local Department of Employment office; 4–8 weeks end-to-end
• BOI route — capital and Thai-staff ratios waived; processing at the BOI One Stop Service Centre in Chamchuri Square Bangkok; 7–14 working days end-to-end; foreign employees can hold senior management or specialist positions only
• BOI route also enables a 'Visa & Work Permit' single-submission window, where the Non-B visa stamp and the WP-7 booklet are issued together on the same day after document checks

Personal documents the foreign employee must provide

The employee-side document package is consistent across BOI and non-BOI routes. Most foreign-issued documents require translation into Thai and authentication chain (notary in the home country, then the Thai embassy in the home country, or alternatively MFA legalization once translated in Thailand).

• Passport with at least 18 months validity and the active Non-B/IB visa
• Bachelor's degree certificate AND transcript — both notarized, translated, and authenticated
• CV with continuous employment history matched to the job offer
• Two reference letters from previous employers (BOI strongly prefers this)
• Medical certificate issued in Thailand within the last 30 days (covers six specific diseases listed in the application form)
• Five 5×6 cm colour photographs in formal business attire, taken within six months
• TM6 arrival card (or e-arrival receipt) showing the most recent Non-B entry

Company-side documents the employer must compile

The sponsoring Thai company files the bulk of the paperwork. For a non-BOI applicant, the package is substantial because the Department of Employment uses it to verify the capital ratio, Thai-staff ratio, and business legitimacy.

• Company affidavit (Nor Sor 2.0) issued within the last 90 days
• Shareholder list (Bor Or Jor 5) issued within 90 days
• VAT registration certificate (Phor Phor 20)
• Most recent withholding tax returns (Phor Ngor Dor 1) for Thai employees — proof of the four-Thai-per-foreigner ratio
• Most recent social security contribution list (SSO 1-10)
• Audited financial statements for the last fiscal year
• Map and photographs of the office premises (the work permit ties to a specific address)
• Employment contract signed by both parties, specifying job title, salary, duties and term

Realistic 2026 timeline

From the day a complete document package is filed, plan as follows:

• Non-BOI in Bangkok — Department of Employment review 7–10 working days, WP-7 booklet issuance 2–3 working days after approval
• Non-BOI in a province (Phuket, Chiang Mai, Pattaya) — typically 2–4 working days longer than Bangkok due to file routing
• BOI route — One Stop Service Centre processes the visa and work permit in 3 hours of counter time after document approval, but document approval itself takes 5–10 working days
• Visa conversion (in-country switch from Tourist or Education to Non-B) — adds 2–3 weeks at the Immigration Bureau

Government fees in 2026

Fees are paid in Thai baht in cash or cashier's cheque at the relevant counter. There is no online payment for work permit fees.

• Work permit application fee — THB 100
• Work permit issuance — THB 750 for 3 months, THB 1,500 for 6 months, THB 3,000 for 1 year, THB 6,000 for 2 years
• Non-B visa stamp — THB 2,000 single entry, THB 5,000 multiple entry (issued at Thai embassy abroad) or THB 1,900 in-country conversion
• 90-day report and one-year extension of stay — THB 1,900 each
• Re-entry permit (if leaving Thailand mid-permit) — THB 1,000 single, THB 3,800 multiple

The annual renewal cycle expats must master

A Thailand work permit and Non-B visa run on parallel one-year cycles that the foreign employee must personally manage. Missing a single deadline can void both documents and trigger a 90-day exit-and-re-enter process.

• Day -45 — start collecting the renewal document package (financial statements, tax filings)
• Day -30 — file the work permit renewal at the Department of Employment
• Day -10 — file the visa extension at the Immigration Bureau (must be at least 7 days before expiry)
• Every 90 days — file the TM47 90-day address report (online or in person)
• Within 24 hours of arriving home — landlord files the TM30 address notification

Common pitfalls that delay or void the permit

The Department of Employment is administratively strict. The most common reasons applications are returned or permits voided after issuance:

• Foreign degree not authenticated by the Thai embassy in the home country (translation alone is insufficient)
• Job title on the work permit does not match the daily duties (especially common when expat is promoted internally)
• Working from a branch office or client site not listed on the work permit
• Travelling out of Thailand without a re-entry permit — the visa cancels automatically on exit
• Failing to file the TM47 90-day report on time (THB 2,000 fine and a black mark on the immigration file)

How a law firm shortens the timeline and reduces risk

Most large Thai companies and all BOI-promoted firms outsource work permit processing to a specialist law or visa firm. The firm pre-checks the document package against current Department of Employment guidance (which changes informally several times a year), books the application slot, attends the counter on behalf of the company representative, and handles all renewals and 90-day reports. For SME employers in Phuket, the typical service fee is THB 25,000 to 45,000 per foreign employee per year, all-inclusive of translation and certification of the foreign degree.