The Foreign Business Act and BOI Promotion in Thailand

Thailand does not close its economy to foreigners, but it does close specific activities to majority foreign ownership unless the company qualifies for an exemption. The Foreign Business Act is the law that draws that line, and three legitimate routes exist around it: a Foreign Business Licence, promotion from the Board of Investment, and (for American-owned companies only) the US-Thai Treaty of Amity. Each carries real conditions; none is a way to skip scrutiny.

The logic of the Foreign Business Act

The Foreign Business Act (FBA) defines “foreign” for a company by its shareholding: a company with 50% or more foreign-held shares is treated as foreign for the Act’s purposes, regardless of where it is registered. It then sorts restricted activities into three lists, roughly rising in strictness:

• List 1 covers activities considered closed to foreigners outright: no licence, no promotion, and no ownership structure changes that. Examples include specific media, land trading, and certain agricultural activities.
• List 2 covers activities tied to national security, arts and culture, natural resources, or the environment. Foreign participation is not absolutely barred, but requires Cabinet-level approval through the Ministry of Commerce, and in practice this route is used rarely.
• List 3 is the largest and most relevant list for founders reading this: services, and a range of trading and other activities where Thai businesses are judged not yet able to compete on equal terms with larger foreign players. This is where a Foreign Business Licence becomes the practical route.

Why the restriction bites hardest on services. Manufacturing for export, and many activities that clearly add production capacity or jobs without competing directly with existing Thai service businesses, sit outside the restricted lists or are actively courted through BOI promotion. Services (consulting, most retail formats, many trading activities, and similar) are exactly where List 3 concentrates, because these are the businesses where a foreign entrant competes head-to-head with existing small Thai operators. A founder planning a service business should assume the activity is restricted until a licensed adviser confirms otherwise, not the reverse.

Route 1: Foreign Business Licence or certificate

For a List 3 activity, a foreign-majority company can apply for a Foreign Business Licence from the Ministry of Commerce, via the Department of Business Development. The application is assessed on criteria that include the impact on Thai competitors, technology or know-how transfer, and capital brought into the country. It is a genuine case-by-case review, not a formality, and approval is not guaranteed. Some routes instead use a Foreign Business Certificate, issued rather than licensed, for companies that qualify through a treaty (the Amity route below) or a BOI-related exemption rather than through the discretionary licence process. The practical difference matters for timeline and certainty, and a licensed Thai lawyer will tell you which applies to your specific activity and structure.

Route 2: BOI promotion

The Board of Investment (BOI) is a government body that promotes investment Thailand wants (activities that build technology, exports, regional headquarters functions, or strategic industries) by offering incentives that can include relief from the Foreign Business Act’s ownership restriction for the promoted activity.

What BOI promotion is for. It targets categories the government prioritises for the country’s development, which shift over time as national priorities shift; recent priority areas have included advanced manufacturing, digital infrastructure and data centres, the bio-circular-green economy, and high-value services such as regional headquarters and R&D. The exact list of promoted activities and their conditions is set by the BOI and changes; check the current categories with the BOI or a licensed adviser rather than relying on a fixed list here.

The kinds of incentive. BOI promotion can bring:

• Tax holidays: exemption from or reduction of corporate income tax for a period tied to the activity’s category.
• Ownership relief: for many promoted activities, 100% foreign ownership despite what the Foreign Business Act would otherwise require.
• Import duty relief: on machinery and, for export manufacturing, on raw materials.
• Land ownership facilitation: promoted companies can, in some cases, own land they would not otherwise be permitted to hold as a foreign-majority entity.
• Visa and work-permit facilitation: a faster, often more generous track for foreign staff than the standard process, covered in the work permit guide.

The real application burden. BOI promotion is not a shortcut for a small service business; it is a formal application against a specific promoted activity, with a business plan, investment commitments, and reporting obligations that continue for the life of the promotion. A promoted company must operate within the scope it was promoted for, report against its commitments, and notify the BOI of material changes such as a large shift in ownership. Losing alignment with the promoted activity, or failing to meet the conditions attached to the promotion, can put the incentives (and in some cases the underlying ownership relief) at risk.

Route 3: the US-Thai Treaty of Amity

The Treaty of Amity and Economic Relations, in force since 1968, lets companies majority-owned and controlled by US nationals operate in Thailand on close to the same footing as Thai-owned companies, exempt from most of the Foreign Business Act’s restrictions. It is available only to genuinely American-owned and American-managed companies. This is checked, not assumed.

What it grants. Broad exemption from Foreign Business Act ownership limits for most activities, letting a US-majority company hold close to full ownership of a Thai business that would otherwise need a licence or Thai-majority structure.

What it still excludes. The treaty does not cover everything: activities such as land ownership, certain communications and transport sectors, banking, and a handful of others remain outside its scope, and the precise exclusions are worth confirming with a licensed adviser for your specific activity. It also does not exempt the company or its foreign staff from Thailand’s work-permit regime: Amity ownership answers the ownership question, not the “can this specific person work here” question, which is a separate process (see the work permit guide below).

The certification process, in outline. The typical path runs through three stages: registering a Thai limited company in the normal way; obtaining certification from the US Commercial Service at the US Embassy that the company is genuinely American-owned and managed; and then applying to the Department of Business Development for the Foreign Business Certificate that formalises the exemption. Ownership and management need to stay above the treaty’s thresholds on an ongoing basis: a drop in US shareholding or US-held directorships below what the treaty requires can void the certification, which makes the treaty a structure to maintain deliberately, not a one-time filing to forget about.

Life after promotion is granted

Getting the promotion certificate is the start of an ongoing relationship with the BOI, not the end of the process. A promoted company takes on obligations that run for the life of the promotion, and the BOI monitors against them.

Conditions attached to the certificate. Every BOI promotion is issued against a specific set of conditions tied to the promoted activity: minimum investment or capital commitments, a timeline for starting operations, sometimes local content, employment or export requirements, and the scope of activity the company was actually promoted for. These conditions are set out in the promotion certificate itself, and they vary by category and by the specifics of the application; there is no single universal checklist.

Annual reporting. A promoted company generally has to report to the BOI on an ongoing basis: confirming it is still operating within the scope it was promoted for, meeting investment or performance commitments, and maintaining whatever ownership or management structure the promotion assumed. The exact reporting cadence and format are set by the BOI and can differ by activity category; a promoted company should build this into its normal compliance calendar alongside its corporate tax filings, not treat it as a one-off formality after the certificate arrives.

Material changes that must be notified. A promoted company generally needs to notify the BOI of significant changes that could affect its eligibility: a material shift in shareholding, a change to the actual business activity carried out, moving the promoted operation to a different location than approved, or a significant change in the investment plan the promotion was granted against. Making such a change without notifying the BOI first is one of the more common ways a promotion runs into trouble, often discovered only when the company’s next report or an audit surfaces the gap.

What can cause a promotion to be withdrawn. Grounds for revocation vary by case, but recurring themes include: operating outside the scope of the promoted activity, failing to meet the investment or performance commitments the promotion was granted against, letting the ownership structure drift below what the promotion assumed without notifying the BOI, and submitting false or materially incomplete information in the original application. Revocation can mean losing the incentives going forward and, depending on the circumstances, having certain benefits already received clawed back. This is a real risk, not a theoretical one, and it is why a promoted company needs someone actively tracking compliance, not just the person who handled the original application.

The practical takeaway. BOI promotion is closer to an ongoing regulatory relationship than a one-time grant. A company that treats the certificate as the finish line, rather than the start of a compliance obligation, is the company most likely to find its incentives at risk years into operating. Confirm the specific reporting schedule and compliance obligations attached to your promotion with the BOI directly, or with a licensed adviser who handles BOI compliance rather than only applications.

Specialised regimes, in outline

A few adjacent structures come up alongside these three main routes:

• International Business Centre (IBC) and similar regional-headquarters regimes: tax and regulatory arrangements aimed at companies using Thailand as a base for managing regional operations, with their own eligibility tests and reporting obligations, distinct from ordinary BOI promotion.
• SMART Visa: a visa category (not an ownership route) for qualifying investors, executives, experts, and startup founders in targeted industries, often used alongside BOI-promoted structures to bring in specific talent faster than the standard work-permit path.

The trade-offs, plainly

None of the three routes is free of ongoing scrutiny, and none is a way to treat a restricted activity as unrestricted going forward:

• BOI promotion brings real incentives but also real reporting duties, activity restrictions, and a condition-monitoring relationship with the BOI that lasts as long as the promotion does.
• The Treaty of Amity solves ownership for qualifying American companies but changes nothing about work-permit rules, and it lapses if US ownership or control drops below the treaty’s threshold.
• A Foreign Business Licence is a genuine, discretionary application, assessed on its merits, and rejection is a real possibility, not a technicality to route around.

A decision framework

Where none of the routes fit cleanly, the honest options are a real Thai-majority partner (not a nominee, which is illegal and covered in the company setup guide) or deciding that the activity, as structured, does not belong in Thailand yet.

Disclaimer

This article is general information, not legal or investment advice. The Foreign Business Act’s lists, BOI promoted categories and incentives, and Treaty of Amity practice all change, and a reform to the FBA has been proposed but is not law until published in the Royal Gazette. Confirm your activity’s current status and the applicable route with the Board of Investment, the Department of Business Development, or a licensed Thai lawyer before committing capital.

Common questions

Is Thailand actually closed to foreign business owners?

No: most manufacturing and many BOI-promoted activities are open, and services can often be opened through a Foreign Business Licence, BOI promotion, or the Treaty of Amity. What is closed is majority foreign ownership of a specific, defined set of restricted activities, mostly services, without going through one of those routes.

What is the difference between a Foreign Business Licence and BOI promotion?

A Foreign Business Licence is a discretionary approval to operate a specific restricted activity as a foreign-majority company; BOI promotion is a broader package of incentives (potentially including ownership relief) for activities the government wants to attract, with its own reporting obligations attached.

Does the Treaty of Amity mean I don’t need a work permit?

No. The treaty addresses company ownership, not individual permission to work. A US national who owns an Amity company still needs a proper visa and a work permit to work in that company, exactly as described in the founder work-permit guide.

Can I just use a Thai nominee shareholder to get around the Foreign Business Act?

No, and you should not try. Nominee shareholding (a Thai name on paper with no real stake or control) is illegal under Thai law, is actively enforced against, and puts both the foreign beneficiary and the Thai nominee at legal risk. See the company setup guide for why this is not a workaround.

How long does BOI promotion take to obtain?

It varies by category and how complete the application is, and the BOI publishes its own current processing expectations; treat any fixed number you see elsewhere as indicative at best. What is consistent is that it is a genuine application process with a business plan and investment commitments, not a same-week formality.

What happens if a proposed reform to the Foreign Business Act passes?

Proposed liberalisation of some List 3 sectors and simplification of the licence process have been discussed, but a proposal is not law until it is published in the Royal Gazette. Treat any reporting on upcoming changes as a signal to re-check with a licensed adviser closer to your registration date, not as current law.