A foreign company that wants goods made in Thailand has two main routes. It can buy from a Thai contract manufacturer, which generally needs no Thai entity and little capital, or it can run its own factory through a Thai limited company, which gives direct control over process and IP but brings licences, land and employer duties. Contract manufacturing tends to suit companies still proving volume, while an own plant suits stable demand and sensitive processes. Each route brings its own operations work: supply agreement review and, where staff are placed in Thailand, EOR hiring for the contract route, and entity formation, payroll and work permits for an own plant.
Key takeaways
- A Thai contract manufacturer can supply an overseas buyer under a supply agreement, so the buyer generally needs no Thai entity to start.
- A legal employer becomes necessary once the buyer wants its own quality engineers or supplier managers in Thailand. An EOR covers this without a local entity.
- An own factory usually means a Thai limited company, a factory licence, an industrial estate site and direct liability under Thai labour law.
- Standard manufacturing is often outside the Foreign Business Act's restricted lists. BOI promotion can add tax and import duty incentives for eligible projects.
- A phased route keeps capital flexible: contract manufacturer first, then an own plant once volume is proven.
About the Author
This guide comes from Settlr Global's Business Operations and People & HR teams, led by Managing Director Gagan Ajmani, who has 15+ years of regional experience across Southeast Asia. Settlr Global reports 200+ companies incorporated and 300+ visas and work permits processed.
What is the difference between a contract manufacturer and your own factory in Thailand?
The choice between the two routes turns on who carries the operating obligations. With a contract manufacturer, the Thai partner owns the plant, employs the workforce and holds the factory licence. The partner is also directly liable for working hours, wages and social security under Thai labour law.
With an own factory, the foreign company's Thai entity carries all of those duties. Under a contract manufacturing deal, the buyer generally keeps control of:
- product specifications and quality standards set out in the supply agreement
- moulds and tooling where the contract states ownership
- pricing, volumes and delivery terms
A company should settle how much of the operation it needs to own before anything else. That decision sets the entity, licence and hiring work that follows. Our guide to expanding to Thailand sets out entry routes by home region.
Does a foreign company need a Thai entity to use a contract manufacturer?
The contract manufacturing route stays light because an overseas company can buy from a Thai factory under a supply agreement and import the goods without company registration in Thailand. The need for a Thai employer appears once the buyer wants its own people near the production line. Typical roles at this stage are quality engineers, a supplier development manager or a country lead.
These staff need a Thai legal employer, and an employer of record Thailand arrangement fills that gap. The EOR employs the staff under its own Thai company while the overseas client directs the work. With Settlr Global, for example, the first hire takes about 2 days, from THB 8,999 per employee per month for a local hire and THB 10,999 for an expat hire, through the Settlr Global EOR service.
Before signing, a buyer should have the supply agreement checked for tooling ownership, IP, confidentiality and governing law. Those clauses decide what can be moved if the relationship ends. See our legal advisory page for contract review.
What does building your own factory in Thailand involve?
An own plant moves every obligation the contract manufacturer carried onto the foreign company's books. The work generally follows this order.
- Choose the ownership route. A Thai limited company is the usual vehicle. Where an activity is restricted under the Foreign Business Act B.E. 2542 (1999),11boi.go.thboi.go.th the options are a Foreign Business License in Thailand, BOI promotion or, for US-majority companies, the Treaty of Amity in Thailand. Each route has its own exclusions.1boi.go.thboi.go.th
- Assess BOI promotion. According to the Board of Investment, eligible manufacturing projects can receive corporate income tax exemptions, import duty exemptions on machinery and import duty exemptions on raw or essential materials used in production for export, as set out in the Board of Investment FAQ.22boi.go.thboi.go.th The Board of Investment's 2024 investment presentation33boi.go.thboi.go.th also lists 100% foreign ownership among its incentives.2boi.go.thboi.go.th3boi.go.thboi.go.th
- Select a site. The Industrial Estate Authority of Thailand publishes details of each estate it lists, such as WHA Industrial Estate Eastern Seaboard,44ieat.go.thieat.go.th and utilities and fees should be confirmed with the estate before a site is chosen.4ieat.go.thieat.go.th
- Obtain operating licences. Factory and environmental requirements depend on the process and location. They should be confirmed with the Department of Industrial Works or the Industrial Estate Authority of Thailand.
- Set up payroll and filings. A factory company runs payroll with PND.155rd.go.thrd.go.th withholding and Social Security Office contributions,66sso.go.thsso.go.th files VAT on PP.305 and handles Thailand corporate income tax on PND.515 and PND.50.5 The Thailand Tax Calendar 2026 lists the deadlines.5rd.go.thrd.go.th6sso.go.thsso.go.th
A company should budget for accounting and tax support as early as it budgets for land. Accounting and filing obligations generally begin at incorporation, well before the first production run.
How do the two routes compare on cost, control and risk?
Comparing the routes side by side shows how much capital and liability a company accepts in exchange for control.
| Factor | Contract manufacturer | Own factory |
|---|---|---|
| Thai entity | Not generally needed to buy | Thai limited company or BOI-promoted company |
| Upfront capital | Tooling and samples | Land or lease, building and machinery |
| Employer duties | Held by the partner | Held by the company |
| Process and IP control | Contractual | Direct |
| BOI incentives | Go to the partner, if promoted | Available to the company if eligible |
| Exit | End the supply agreement | Sell or close the entity and assets |
A simple test helps here. An own plant is worth modelling when V × (P minus C) exceeds F. V is annual volume, P is the contract price per unit, C is the projected own cost per unit and F is the annual fixed cost of plant, staff and compliance.
Which route fits a China Plus One strategy?
For companies diversifying away from China, the same trade between capital and control applies, but tariffs and timing matter more. Under a China Plus One strategy, Thailand offers an established supplier base and is a party to the Regional Comprehensive Economic Partnership (RCEP),77mfa.go.thmfa.go.th which the Ministry of Foreign Affairs reports Thailand ratified in October 2021.
7mfa.go.thmfa.go.th
A company moving final assembly often starts with a contract manufacturer to test quality and Thai origin rules. A company moving proprietary processes tends to need its own plant, because process know-how is hard to protect by contract alone. Rules of origin should be checked for each export market before the route is chosen.
Can a company start with contract manufacturing and move to its own factory later?
A phased path is often the practical answer to the trade-off above, since it lets demand data set the timing.
- Contract with a Thai manufacturer and place quality staff through an EOR.
- Register a Thai entity once volume is stable, with a BOI application where the project qualifies. Settlr Global can run EOR while incorporation is underway.
- Secure the site and operating licences.
- Move EOR employees onto the new entity's payroll and transfer production in stages.
The Thailand business setup guide covers entity choices for this stage of business setup in Thailand.
Frequently asked questions
Can a foreign company own 100% of a factory in Thailand?
Often, yes. Standard manufacturing is frequently outside the business lists annexed to the Foreign Business Act B.E. 2542 (1999),1 and the Board of Investment's 2024 investment presentation3 lists 100% foreign ownership among the incentives for eligible promoted projects. Restricted activities need a Foreign Business License or another route. Approval is not guaranteed and depends on each application's specific circumstances.
Does buying from a Thai contract manufacturer require a Thai company?
Generally not. You can purchase and import under a supply agreement. A Thai entity or an EOR becomes relevant once you want to employ staff in Thailand.
Can EOR staff work at a contract manufacturer's site?
Generally yes. The EOR is the legal employer and you direct the day-to-day work, so quality engineers can be based at a partner plant. Site access and safety rules should be written into your supply agreement.
Which visa do foreign managers at a Thai factory need?
Foreign staff employed in Thailand generally need a Non-Immigrant B visa and a work permit. See our visa and work permit services for details. The Destination Thailand Visa is for remote workers and digital nomads and does not permit employment with a Thai employer. The DTV guide explains who qualifies, and the Thailand Visa Matcher gives an indicative fit.
How long does it take to open a factory in Thailand?
Timelines vary with BOI review, licensing and whether the site is built or leased ready-made. Government processing times are not fixed, so your plan should carry buffer around each approval.
About Settlr Global
Settlr Global is the operating arm of WOWS Global, a Singapore-incorporated corporate advisory and investment banking group, and provides a one-platform ecosystem for business operations in Thailand. It combines payroll, HR, legal, tax and incorporation support under a single team, so founders do not have to coordinate separate local agencies. The platform has processed payroll and compliance work for 200+ clients across 15+ countries, from early-stage startups to established multinational enterprises. Its Employer of Record service lets companies hire in Thailand in about two days, with or without a local entity.
If you are weighing a contract manufacturer against your own plant, talk to the Settlr Global team about the entity, hiring and filing work each route needs.
References
- boi.go.thboi.go.th
- boi.go.thboi.go.th
- boi.go.thboi.go.th
- ieat.go.thieat.go.th
- rd.go.thrd.go.th
- sso.go.thsso.go.th
- mfa.go.thmfa.go.th
