Thailand BOI Promotion: Check the Project, Not Just the Industry

The biggest BOI incentive is not necessarily the best one for your business. A long tax holiday is useful only if the project qualifies, earns covered profits and can meet its conditions. For a small founder, a simpler lawful structure can sometimes be a better fit than a promoted project with commitments the business cannot sustain.

Thailand's Board of Investment promotes specific activities, not any company describing itself as innovative. This guide was reviewed on 5 October 2026. It explains how to read the incentives, with examples from the official guide; it does not promise approval for a sector or company.

Start with the activity code, then the incentive

Use the official eligible-activities list to identify what the project will actually do. Read the description, conditions, investment basis and incentive group together. “AI”, “biotech” or “EV” on a pitch deck does not establish eligibility.

The official Investment Promotion Guide available from BOI's OSOS service carries a September 2025 preface. It is a useful baseline, not a substitute for the later announcements. That distinction matters when reading a 2026 article: an older guide can contain measures whose application windows have closed.

What the basic incentive groups mean

The guide's basic scheme distinguishes these corporate income-tax incentives. The exemption concerns qualifying profits from the promoted project, not every payment the company receives.

BOI	Basic profit-tax exemption in the guide
A1+	10–13 years, no cap
A1	8 years, no cap
A2	8 years, with a cap
A3	5 years, with a cap
A4	3 years, with a cap
B	No basic corporate income-tax holiday

The general capped scheme is tied to qualifying investment as determined by BOI; some activities have a special calculation. Additional measures can change the benefits, but only if their own requirements are met. Do not add every headline incentive together as though they all apply to one project.

Import-duty and non-tax benefits are separate from profit-tax relief. Their use may require approved machinery or materials lists, position approvals, applications and records. Promotion does not mean unrestricted duty-free imports or automatic work permission for anyone on the payroll.

Which sectors deserve a closer look?

The guide covers agriculture, food and biotechnology; medical activities; advanced manufacturing; materials and supporting industries; digital activities; creative work and high-value services. These headings help you find a division, but the activity underneath is what determines the conditions.

Research-heavy or advanced-technology projects may have strong incentives. They also need evidence of the required processes, investment and capabilities. A reseller of imported medical devices is not automatically treated like a manufacturer or research project. An ordinary restaurant is not a biotechnology project because it serves healthy food.

For manufacturing, check the process, machinery, environmental requirements, location and financing before committing to a site. For services, check what work must happen in Thailand and what expenditure counts. A broad sector comparison without those details gives a misleading picture of the real obligation.

Software shows why the fine print matters

The guide's activity 8.1.1 concerns development of software, digital platforms or digital content. Its listed conditions include development processes in Thailand and a minimum annual investment basis of 1.5 million baht calculated from specified Thai IT-personnel salary expenditure. It excludes retail and wholesale sales of products.

The listed incentive is A2, but this activity has its own annual exemption-cap calculation. It is not simply “put money in a company and pay no tax for eight years.” The guide also sets a full-operation deadline and rules on extensions. Confirm the currently applicable activity and announcement with BOI before hiring or spending to meet a condition.

The neighbouring software-modification activity is listed as B in that guide. A seemingly small difference in what the team does can therefore change the incentive. Our remote-work business guide explains why freelancing, overseas employment and a Thai development operation should not be treated as the same arrangement.

Calculate the benefit your project can actually use

Prepare two budgets: the ordinary lawful route, and the proposed promoted project. Include the same commercial assumptions in both. Then add the promoted route's qualifying investment, recruitment, reporting and professional support costs.

In a deliberately simplified example, 1 million baht of qualifying net taxable profit would create 200,000 baht of corporate income tax at the general 20% rate before other relief. It would not create a benefit worth 20% of total sales. If the project makes a loss, there is no current profit tax for that year's holiday to remove.

Ask the accountant to model the exemption cap, covered income, starting date and profits outside the promoted activity. Do not assume the tax holiday starts when the founder signs the application. Use our company budget checklist to keep capital, fees and operating cash separate.

Ownership, land and staff still need individual checks

Foreign shareholding may be permitted for a promoted activity, subject to its conditions and other laws. Where a Foreign Business Certificate is required, it remains a separate step. BOI is not permission to add any restricted side business to the same company.

Likewise, an approved project-related land benefit is not a personal property-purchase shortcut. Check the approved use, legal owner and conditions before acquiring land. Ordinary company formation is covered in our registration guide.

Promoted companies can have specific routes for bringing in skilled workers and experts. That does not erase position approval, individual immigration and work-authorisation checks, or obligations to Thai employees. Keep the project staffing plan aligned with the foreign hiring checklist.

Leave the first meeting with a short written checklist

• The exact activity code and current announcement relied on.
• The expenditure and staffing that count towards qualification.
• The incentive group, cap and income covered by the proposed benefit.
• The application, acceptance, certificate and full-operation deadlines.
• The evidence and reporting needed to use each benefit.
• What happens if the product, location, ownership or timetable changes.

Keep realistic figures in the application. Increasing a declared investment to make it look impressive can create commitments the project cannot meet. A defensible project with clear records is more valuable than a larger number on paper.

Common questions

Does every BOI-promoted company get a tax holiday?

No. BOI's basic scheme includes group B without a corporate income-tax holiday. Benefits depend on the approved activity, certificate and applicable conditions.

Does an AI or software business automatically qualify?

No. Match the actual development activity to the current BOI rules. The official guide's software-development example includes Thai development and specified personnel-expenditure conditions.

Does promotion cover all the company's income?

No. A project incentive is not a blanket exemption for unrelated business income. Have an accountant identify covered profits, the exemption cap, the starting date and the required records.