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Work permits, BOI/IEAT privileges, Treaty of Amity and APEC card — practical answers

First-party answers on Thai work authorisation: the standard Department of Employment route, BOI and IEAT channels for skilled experts, US company rights under the Treaty of Amity, and the APEC Business Travel Card for Thai nationals — including which supporting documents must be translated and legalised first. (19+ search topics covered)

Can I keep my work permit after changing employer?

A work permit is tied to the employer and the described work. Changing employer or the nature of the work requires notification or a fresh authorisation within the timeframe set by the Department of Employment's rules. Working for a new employer before that is completed falls outside the scope of the permission and exposes both employee and employer to penalties.

Must authorisation be obtained before starting work?

Yes. A foreign national must hold the permit before performing work, and may only do the role, for the employer and at the locations stated in the permit. Trial periods and side assignments outside that scope are not covered. Changes of employer, position or workplace require notification or amendment through the Department of Employment.

What must an employer prepare for a first foreign hire?

Typically current company records — registration certificate, shareholder list, financial statements and tax filings — together with social security registration for employees and an employment contract whose job title and scope match the permit sought. Ratio requirements for Thai employees or minimum registered capital may apply under the rules in force, so the corporate structure should be reviewed before filing begins.

What does the BOI channel change?

Promoted companies can request approved skilled or expert positions through the BOI e-Expert system and complete visa and work permit formalities at the One Stop Service Center. Conditions and validity depend on the promotion certificate and the approved position, so a company should confirm its certificate conditions before planning foreign headcount.

What happens if the permit lapses while renewal is pending?

Renewal must be filed before expiry within the period set by the regulations, and the permitted-to-stay end date must be tracked alongside it because the two dates do not always coincide. A lapse can force a restart and affect immigration status. Set calendar reminders several weeks ahead and keep current employer documents ready before the deadline.

What rights does the Treaty of Amity give US companies?

The 1966 Treaty of Amity and Economic Relations lets US nationals and majority US-owned companies operate in Thailand on largely the same footing as Thai nationals, exempt from many restrictions of the Foreign Business Act B.E. 2542, with some sectors still excluded such as land and certain resource activities. Use of the treaty requires nationality certification through the US Embassy and registration with the Department of Business Development.

Can I start working while the application is pending?

Working before authorisation is granted exposes both the worker and the employer to penalties under the foreigners' working management law. The safe course is to agree a start date conditional on issuance, and to keep the employment contract, the position description and the employer's registration documents consistent with what was filed, since discrepancies between the contract and the filing are a frequent cause of rejection.

Who can obtain an APEC Business Travel Card?

The card facilitates business travel among participating APEC economies and is issued to Thai business people by the Department of Consular Affairs, subject to endorsement by the designated authorities. Pre-clearance for each economy is decided by that economy, and the card does not grant the right to work abroad.
Topics covered
คำค้นหลัก: ขอใบอนุญาตทำงานคนต่างชาติ · work permit thailand requirements · BOI work permit e-Expert · one stop service center visa work permit · IEAT work permit นิคมอุตสาหกรรม · treaty of amity company registration · บัตรเอเปค APEC Business Travel Card
เอกสารที่มักต้องแปล/รับรอง: ปริญญาบัตร/ทรานสคริปต์ · หนังสือรับรองประสบการณ์ทำงาน · ใบอนุญาตประกอบวิชาชีพ · หนังสือรับรองบริษัทต่างประเทศ · หนังสือมอบอำนาจ (Power of Attorney) · ทะเบียนสมรส/สูติบัตรของผู้ติดตาม
หน่วยงานที่เกี่ยวข้อง: กรมการจัดหางาน (DOE) · สำนักงานคณะกรรมการส่งเสริมการลงทุน (BOI) · การนิคมอุตสาหกรรมแห่งประเทศไทย (กนอ./IEAT) · กรมพัฒนาธุรกิจการค้า (DBD) · สำนักงานตรวจคนเข้าเมือง (ตม.) · กรมการกงสุล กระทรวงการต่างประเทศ
Official references

Need your documents reviewed or your case assessed? Ask our team by phone, LINE, or email. We reply during business hours (Mon–Fri 9:00–18:00, Sat 9:00–15:00, ICT).

083-249-4999LINE @NYCVcontact@nycvisa.org
Company documents used to support a work permit application
Company documents used to support a work permit application — From actual casework by the NYC Visa & Translation team
Service Playbook

Thai work permit — company-side and employee-side documents

Work permits are issued by the Department of Employment and are tied to the employer, position and workplace. Changing job, role or location requires a new filing.

Documents to prepare

  • • Company side: current affidavit, shareholder list, financial statements, social security filings
  • • Employee side: passport, the correct visa category, and the required medical certificate
  • • Degrees and experience letters, legalised at source and translated for Thai use
  • • Employment contract and job description
  • • Workplace map and photographs where requested
  • • Power of attorney for the company's filing agent

Step-by-step process

  1. 1. Check company and role eligibility — Registered capital, Thai-to-foreign staff ratio and reserved occupations are verified first.
  2. 2. Prepare foreign documents — Qualifications and experience letters must be legalised abroad and translated before filing.
  3. 3. File the application — Through the Department of Employment, or a dedicated channel such as the BOI One Stop Service.
  4. 4. Collect and comply — Work only within the stated role and location, and renew before expiry.

Pitfalls and rejection causes

  • • Working outside the stated role or location breaches the permit conditions.
  • • A permit belongs to the employer — it cannot follow you to a new company.
  • • Visa and permit expire on different dates; track both.
  • • Company documents older than the accepted window must be reissued.

Tips from our team

  • • Set reminders at least 45 days before either expiry date.
  • • Maintain a standing company document pack to speed up future filings.
  • • BOI-promoted companies should use the dedicated channel to cut steps.

Prefer not to handle the queues yourself, or worried about a rejection? Send us photos of your documents for a free pre-check. We handle the full chain — obtaining certified copies, translation, certification and submission — and keep you updated at each step. Reach us on LINE, phone or email during business hours.

Route Comparison

Comparing Thai work permit routes

Different employer types use different channels, and each channel pairs with a different visa category.

RouteWhen to useCertifying authorityApprox. durationRejection risk
Standard filing with the Department of EmploymentThe employer is an ordinary Thai company without BOI promotionDepartment of Employment, Ministry of LabourVariable, driven by how complete the employer's file isThai-to-foreign staff ratios and registered capital not meeting thresholds is the common refusal ground
BOI-promoted company channelThe employer holds a promotion certificate and the position is on the approved listBOI together with the Immigration Bureau and Department of EmploymentGenerally faster than the standard route, still variableA position that differs from the approved list requires an amendment first
Conditional or short-term work authorisationShort assignments or job types covered by specific published rulesDepartment of Employment under the notification in forceShorter than a full applicationWorking beyond the authorised scope is an offence even when a permit exists

Timelines above are practical estimates from live casework and can change with each authority's policy; confirm with the receiving authority before booking travel. If you would rather not test routes by trial and error, our advisers can assess which route fits your case.

Advisory Service

We do not just process documents — we advise you through the whole case

Our team has worked on cross-border documents, certified translation and government liaison for over 15 years. Most rejections we see are not caused by missing paperwork but by choosing the wrong route on day one, so we always start with a case assessment.

Route assessment

We look at your destination, purpose and deadline, then tell you which certification route applies — and which steps you can skip.

Pre-submission review

Name spelling, consistency across documents, document age and translation format are checked before anything reaches a counter.

Timeline planning

We sequence the steps around your appointment or travel date and flag bottlenecks in advance.

Rejection recovery

We read the refusal reasons, identify the underlying cause, and plan a resubmission that answers what the authority asked for.

Rather not learn by trial and error? Send your case details and document photos for a review — reach us on LINE, phone or email during business hours.

Practical Q&A

Practical questions · Near me / DIY / Required documents

What is the route for Thai company documents used abroad?

Obtain the company affidavit, shareholder list (BorJor 5) or latest memorandum from the Department of Business Development, translate into the language the destination requires, then legalise at the Legalization Division of the Department of Consular Affairs. If the destination is not an Apostille Convention party, the destination country's embassy certifies last.

Must the company affidavit be freshly issued?

Most receiving authorities set a validity window counted from the registrar's issue date, commonly measured in months. Check the recipient's requirement before ordering copies: filing an out-of-date affidavit is a frequent rejection cause, and legalisation cannot revive an expired document.

How is a corporate power of attorney certified?

An authorised director signs before a Notarial Services Attorney, attaching a current company affidavit that evidences signing authority. The signed POA then goes to the Department of Consular Affairs and, where required, the destination embassy. Ask our team by phone, LINE or email for the order that applies to your country.
Practical advice & cautions

Business licensing and BOI: advice and cautions

Before you start

  • Treat product and premises permits as separate from the business licence

    Company registration does not authorise sales. Food, cosmetics and medical devices require FDA Thailand registration, and production or storage premises are inspected separately.

  • Draft company objectives to cover, but not exceed, what you need

    Objectives registered with the Department of Business Development must cover the licensed activity. A mismatch forces an amendment of the affidavit first, typically costing weeks.

  • Check whether your activity sits on a restricted list

    The Foreign Business Act B.E. 2542 groups activities into Lists 1–3 with different conditions. Define the real activity first, then pick the route: licence, certificate, treaty right, or a BOI promotion certificate.

  • Plan licences together with work permits for foreign executives

    Thai-to-foreign staff ratios and registered capital determine how many work permits you can obtain. Design the staffing structure early to avoid emergency capital increases.

Common reasons documents get rejected

  • Signatory names not matching the latest affidavit

    If directors change mid-process, the affidavit and power of attorney must be updated to match, otherwise the application is rejected at intake.

  • Filing before the premises can pass inspection

    Many licences involve a site visit. Filing without signage, floor plans or required sanitation results in a correction order and a new inspection date.

  • Ignoring post-approval reporting duties

    Most licences require periodic reporting, renewal or notification of changes. Missing these can lead to revocation even when the business operates normally.

  • Assuming a BOI certificate covers every activity

    Incentives attach only to the promoted activity and its stated conditions. Revenue from non-promoted activities must be accounted for separately and taxed normally.

Requirements differ by authority and destination country and can change. Confirm current conditions with the receiving authority, or ask our team by phone, LINE or email.

What people search for

Frequently searched topics about BOI and business licensing

Foreign Business Licence
Activities in the schedules to the Foreign Business Act B.E. 2542 require a licence before operating.
Registered capital and Thai staff ratios
Requirements tied to employing foreigners follow the rules in force with the supervising agency at filing time.
Company registration with DBD
Name reservation, memorandum filing and incorporation follow the Department of Business Development's procedure.
BOI promotion privileges
Scope and conditions follow the Board of Investment's announcements for each promoted activity.

These topics reflect the rules and practice of the relevant authorities and can change. Confirm with the receiving authority, or ask our team by phone, LINE or email.

Related services

What clients usually handle next

One document set often moves through several stages — translation, notarial certification, legalization and finally a visa filing. The links below follow that real sequence.

External authority references

Authority requirements change. Verify with the receiving authority before filing, or ask our team by phone, LINE or email.