Situation guide
Thailand's 4:1 Staffing Rule: Stay, Work Permits and Capital
Employers, finance and HR teams preparing Non-B status, business stay extensions and work authorisation.
Quick answer
The clearest basis for four permanent Thai employees per foreign employee is the ordinary business stay-extension test, not a universal work-permit formula. Its THB 2 million paid-up capital clause concerns the business; DOE worker allocation needs separate assessment. The FBA's THB 3 million permission-required floor is per business, not per permit. Listed offices have scoped relief, BOI uses approved personnel routes, and Treaty of Amity certification does not automatically waive every requirement.
The PDF button opens a print-ready sheet — choose “Save as PDF” in the browser dialog. It contains the key facts, the document checklist and the timeline.
Detailed guidance
1. Identify three independent approvals before counting staff
Non-B or Non-Immigrant status concerns entry or immigration status; a stay extension grants additional residence permission. DOE work authorisation is a different process, while FBA/DBD determines the employer's entitlement to carry on the activity. An FBL or FBC does not automatically authorise every employee's stay and work. Maintain separate expiry dates, approval bases and owners for each record.
The familiar 'two million per work permit' expression appears in administrative guidance, but it should not be treated as a universal current allocation rule without checking DOE criteria for the actual employer and application. Likewise, the 4:1 ratio is directly grounded in immigration extension criteria, not proof that all permit types share one formula. A registered capital number alone proves neither actual payment nor work entitlement.
2. Ordinary business extensions require genuine employer evidence
Immigration Order 12/2568 of 23 January 2025, clause 2.1(a), sets out the ordinary business-extension basis: Non-Immigrant status, income meeting the nationality table, at least THB 2 million paid-up registered capital, four permanent Thai employees per foreign employee, and preceding-accounting-year financial evidence of genuine business. Use the current order's wording rather than blending it with older English guidance referring to two accounting years.
The capital paragraph states a business-level threshold, not two million baht per foreign employee within that clause. Finance should reconcile registered capital, company records, actual share-payment evidence and bank movements. Do not create evidence through temporary circular deposits or nominal employees who do not genuinely work. The receiving office's current order and document list must be checked before submission; automated access to some official hosts can be restricted.
3. Listed offices receive specific relief, not a zero-staff exemption
Clause 2.1(a)(6) provides relief for the specified representative offices, regional offices and qualifying multinational-company branches: the cited capital and financial-statement criteria are waived and the staffing ratio becomes one permanent Thai employee per foreign employee. This is a business stay-extension relaxation, not permission to employ zero Thai staff. A Thai subsidiary must not be relabelled a branch to claim the exception.
Retain the office's legal establishment basis, parent-company papers, permitted activities and remittance records consistent with its classification. Immigration relief does not automatically waive DOE work authorisation, accounting duties or FBA capital and funding obligations. A non-revenue representative office can still have payroll, expenses and reporting duties. Distinguish funding support from sales in the accounts rather than treating no revenue as no compliance.
4. BOI and Amity are not interchangeable exemptions
BOI approved-personnel routes operate through Investment Promotion Act sections 25 and 26, with endorsed positions, headcount, duties and periods. Promotion does not cover every employee, activity or affiliate. Nor should the guide claim there are no Thai-staffing conditions: Por.8/2568 adds scoped personnel requirements, including a 70% Thai-employment condition for the specified manufacturing population subject to headcount and implementation rules. That is not a universal condition for every BOI company.
Treaty of Amity eligibility supports a section 11 FBC for the qualifying nationality and activity. The certificate alone is not a listed waiver of the ordinary immigration ratio or capital test. Where a business independently qualifies as a listed office or has a BOI approval, document that separate basis. American nationality does not remove the work-authorisation requirement, and treaty-specific capital treatment should not be assumed without checking the implementing rules and certificate.
5. Build a staffing reconciliation that survives real changes
Build a dated roster of permanent Thai and foreign employees showing role, start and departure dates, stay basis, work authorisation, paying employer and payroll. Reconcile it to employee records, tax returns and social-security evidence requested for the case. Do not automatically count outsourced or temporary staff as permanent employees. Eight genuine Thai employees for two foreign employees meets the numerical 4:1 comparison only; it does not establish the remaining eligibility conditions.
Reassess ratios, permissions and expiries when employees leave, employers change or renewals approach. Keep the FBA's permission-required capital floor separate: THB 3 million concerns each relevant business, not each employee. Contact staff for document assessment and a quotation, identifying the employer type, BOI/FBC basis and personnel to assess. Provide personal records through an appropriate private channel, not in public messages.
Key facts
| Ordinary stay-extension ratio | 4 permanent Thai employees per foreign employee under the ordinary business category |
|---|---|
| Immigration capital criterion | At least THB 2,000,000 paid-up registered capital for the business; this clause is not worded as a per-person formula |
| Listed office ratio | 1 permanent Thai employee per foreign employee for qualifying listed office relief, not zero Thai staff |
| FBA capital | Permission-required activity has a THB 3 million floor per business, with implementing rules checked; not a work-permit purchase or quota |
| BOI personnel | Check approved positions, individual placement and project conditions; not blanket relief for all employees |
| Amity scope | Treaty-based FBC is not a general immigration or work-permit waiver |
Practical summary
If you only read one block, start with these five lines and return to the detail afterwards.
- 1.Before hiring — Classify the business, stay and work-authorisation bases.
- 2.Before work starts — Confirm work authorisation; Non-B is not a substitute permit.
- 3.Before stay extension — Reconcile capital, staffing and documents under the correct category.
- 4.Company records and paid-up capital evidence
- 5.Dated employee roster
Document checklist
Company records and paid-up capital evidence
Registration alone does not prove payment.
Dated employee roster
The ratio depends on qualifying genuine employees.
Contracts, payroll, tax and social-security records
Reconcile actual duties, employer and payments.
Individual stay and work-authorisation records
Separate both permissions and their expiries.
Office classification or BOI personnel approvals
Evidence the specific relief rather than assume it.
FBL/FBC and activity-specific capital file
FBA capital is separate from immigration capital.
Timeline
Before hiring
Classify the business, stay and work-authorisation bases.
Before work starts
Confirm work authorisation; Non-B is not a substitute permit.
Before stay extension
Reconcile capital, staffing and documents under the correct category.
Whenever personnel change
Recalculate the ratio and reassess any relief basis.
Before the next permission period
Check current DOE, Immigration and BOI requirements independently.
Common mistakes
- Presenting 4:1 as the condition for every work-permit type.
- Turning the FBA floor into THB 3 million per work permit.
- Claiming a representative office needs no Thai employees.
- Promising blanket capital and employment waivers from Amity.
Repeat questions
The directly cited basis is ordinary business stay-extension criteria. DOE assesses work authorisation separately; check the actual application rather than generalise to all routes.
That paragraph states at least THB 2 million paid-up capital for the business, not a per-person formula. DOE worker-allocation criteria need a separate check.
No. Qualifying listed offices use one permanent Thai employee per foreign employee within that stay-extension relief, with other obligations assessed separately.
Do not assume so. A treaty-based FBC is not a general immigration waiver. An independent BOI or listed-office basis must be established separately.
No. Check approved positions and individuals, including Por.8/2568's scoped conditions by activity, headcount and implementation dates.
Verifiable sources
These original sources address the issues described under each reference; they do not certify every statement or a service outcome. Check amendments and the conditions applicable to the entity's actual circumstances.
1. Notification
Immigration Order 12/2568: clause 2.1 business stay extensionsImmigration Bureau
23 January 2025 order separates paid-up capital, staffing and listed office relief from work permits; the official host may restrict automated access.
2. Official system or form
Department of Employment — e-WorkPermit application routesDepartment of Employment
Separate routes for Non-Immigrant skilled workers, BOI cases and employers applying for a worker abroad; select by eligibility, not as a substitute for stay permission.
3. Guidance
BOI: approved skilled personnel under sections 25–26Board of Investment
23 May 2025 guidance separates position approval, individual placement, immigration and work authorisation.
4. Notification
BOI Por.8/2568: promoted-business foreign-personnel criteriaBoard of Investment
Check activity, headcount and implementation dates, including the scoped 70% Thai-employment manufacturing condition; not universal to all BOI companies. BOI-hosted unofficial English translation; automated access may be restricted.
5. Act
BOI: official-hosted Foreign Business Act translationBoard of Investment
Sections 4, 11–12, 14 and 17 cover definitions, certification, capital and licensing; applicable Thai text and regulations govern.
6. Act
US–Thailand Treaty of Amity and Economic Relations (1966)US Department of Commerce and Embassy
National treatment and six reserved categories; neither a general land-ownership right nor a tax exemption.
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