Why a factory in an industrial estate needs industry-literate counsel
A factory rarely faces just one body of law — it faces several at once: labor law, customs procedure, BOI privileges, Industrial Estate Authority (IEAT) regulation, environmental law, and immigration law for foreign staff. A mistake in one layer usually spills into another: an unlawful termination becomes a Labor Court case; a misdeclared tariff code can jeopardize BOI privileges.
This guide summarizes the issues factories in estates meet most often, so management can see the whole picture and know where to ask for advice.
1. Labor law — the number-one factory issue
A factory employs many people, which makes labor disputes its biggest legal risk. Get these right from the start:
- Employment contracts and work rules — establishments above the statutory headcount must maintain and file work rules under the Labor Protection Act. Tight documentation reduces later disputes.
- Termination and severance — severance is calculated on a statutory length-of-service ladder; the longer the service, the higher the pay. Termination needs fair cause and correct procedure, or you risk an "unfair dismissal" claim and additional damages.
- Restructuring / line closures — mass terminations from replacing labor with machinery, or restructuring, carry special severance rules. Plan ahead.
- Disputes and unions — collective-bargaining agreements, mediation, and Labor Court litigation.
Most factories lose labor cases on "missing documents" and "wrong termination procedure," not on the facts. Setting up the system early is far cheaper than fixing it later.
See our labor and termination services.
2. Customs and import duty — where money is most often lost
Factories importing machinery and raw materials have manageable tax costs if they use the right privileges:
- Tariff classification and valuation — wrong classification means overpaid duty, or back-assessment plus penalties.
- Exemptions and drawbacks — BOI privileges, duty drawback for raw materials used in exports, and import into Free Zones / free-trade zones.
- Challenging customs assessments — when assessed extra, operators can appeal and litigate in the Tax Court — a core strength of the firm.
See tax and customs and international trade.
3. BOI investment promotion
Many estate activities qualify for BOI promotion, which grants key privileges:
- Corporate income-tax exemption or reduction
- Import-duty exemption on machinery and raw materials for promoted activities
- Land-holding rights for promoted activities and easier work permits for foreign specialists
After promotion you must report privilege use annually and meet the conditions, or privileges can be suspended. See investment and BOI.
4. Land holding and leasing in estates
Foreign operators generally cannot hold land themselves under the Land Code, but estates offer lawful routes — land-holding rights under a BOI-promoted activity, rights under the Industrial Estate Authority law, or long-term leases. We will not build nominee-shareholder structures, which are an offence.
5. Factory environmental and safety compliance
- Factory operating licence (Ror.Ngor.4) and modification/expansion
- Environmental Impact Assessment (EIA) for activities the law requires
- Industrial-waste and wastewater management to standard
- Workplace safety and liability when accidents occur
When facing a complaint or inspection, consult a lawyer immediately to prepare submissions to the Provincial Industry Office or IEAT and defend related administrative/criminal proceedings to protect the licence. See compliance and environment.
6. EEC — special privileges for the Eastern industrial base
Factories in the Eastern Economic Corridor (EEC) — Chonburi, Rayong, and Chachoengsao (e.g., Amata City, Laem Chabang, Map Ta Phut, Eastern Seaboard) — receive extra tax, visa, and one-stop-approval privileges. Structuring to use EEC alongside BOI can cut costs significantly.
7. Foreign workers and work permits
Factories employing foreign specialists and migrant workers must keep visas, work permits, renewals, and foreign-worker quotas in order. Letting a foreigner work without a permit is an offence even if the visa allows residence. We time filings so there is no gap.
Common mistakes
- Failing to maintain complete work rules and employment documents
- Terminating without fair cause and correct procedure — unfair-dismissal claims
- Misdeclaring tariff codes, or not using available drawback / Free Zone privileges
- Letting BOI privileges lapse by missing reporting deadlines
- Using nominee structures to hold land — unlawful and revocable
- Letting foreign staff start work before the permit is issued
Talk to a lawyer for your factory
Suwanvara Law Firm acts for factories and operators across Thailand's industrial estates, with a bilingual Thai-English-Chinese team. Choose your estate to see area-specific services at our industrial-estate hub, or call for a free initial consultation: +66 92 254 2045.
— Business & Industrial Law Desk, Suwanvara Law Firm (established 1986)