Choosing Between BOI and Non-BOI Companies in Thailand for Foreign Investors

April 22, 2026 Posted by ASEAN Briefing Written by Ayman Falak Medina Reading Time: 4 minutes

The choice between a Board of Investment BOI promoted company and a non-BOI structure fixes three variables at entry. The effective tax rate over the initial investment cycle compresses to 0 percent during incentive years or remains at 20 percent. Ownership is either fully consolidated at 100 percent or constrained by foreign equity limits in restricted sectors. Time to market extends to several months under BOI or compresses into weeks under a non-BOI structure.

Structural differences in ownership tax and market access

A BOI-promoted entity can be 100 percent foreign-owned. A non-BOI company operating in a restricted activity may face foreign equity limits, often structured at 49 percent unless a Foreign Business License or other exemption applies. Corporate income tax is 20 percent for non-BOI companies, while BOI projects can receive tax holidays of 3 to 8 years, depending on activity and location. Import duties on approved machinery and selected inputs can be reduced to 0 percent under BOI incentives when included in the approved project scope.

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Non-BOI companies face duties that can range from 5 percent to 30 percent, depending on the asset class. BOI approval can permit foreign participation in certain promoted activities that would otherwise be restricted. Non-BOI structures remain subject to licensing constraints that can delay or narrow market access.

Financial impact of incentives versus compliance and profit timing

A BOI tax holiday creates a material uplift in early-stage cash flow when profits are generated within the first 3 to 5 years. Where profitability is delayed beyond the incentive window, the tax advantage erodes while compliance costs continue. Import duty exemptions on approved capital items reduce upfront expenditure and can shorten payback periods for projects with machinery investment above US$5 million.

This benefit is offset by application and advisory costs typically ranging from US$10000 to US$50000, alongside recurring compliance costs tied to reporting and audits. The result is a higher return profile for capital-intensive projects with early earnings, while service models with low capital intensity or delayed profitability capture limited financial benefit.

Variable	BOI company	Non-BOI company	Decision impact
Foreign ownership	Up to 100 percent	May be limited in restricted sectors	Determines control and governance risk
Corporate income tax	0 percent for 3 to 8 years, then 20 percent	20 percent from year 1	Drives early-stage cash flow advantage
Import duties	0 percent on approved machinery and inputs	5 to 30 percent, depending on the asset	Affects upfront capital expenditure
Setup timeline	3 to 6 months or longer for complex projects	2 to 6 weeks	Impacts speed to revenue
Compliance cost	Ongoing reporting and audit requirements	Lower regulatory burden	Reduces net benefit over time
Profit repatriation	Typically, a 10 percent withholding tax, depending on the treaty	Typically, a 10 percent withholding tax, depending on the treaty	Neutral on dividends, but it affects cash timing
Business flexibility	Restricted to approved activities	Flexible within permitted scope	Affects the ability to expand or pivot
Work permits	Facilitated but still subject to approval	Stricter ratios and slower processing	Affects execution speed

Profit repatriation and withholding tax exposure

Dividends paid to foreign shareholders are typically subject to a 10 percent withholding tax depending on the applicable tax treaty. BOI promotion does not remove this tax, but can streamline administrative processes for remittance through recognized channels. Cash can only be distributed after tax clearance and audited financial statements are completed, which introduces a timing gap between accounting profit and distributable cash. Delays in documentation or compliance extend this gap and affect group-level liquidity planning.

Control versus flexibility, ownership rights, and operating scope

BOI approval removes the need for local shareholders and consolidates decision-making within the foreign parent, which reduces minority risk and shortens internal approval cycles for capital allocation. This control is bounded by activity-specific approvals that restrict revenue generation to defined business lines. Entering adjacent activities requires formal amendments, which introduce approval risk and delay. The structure concentrates governance control while narrowing the range of actions that can be executed without regulatory clearance.

Work permits and foreign staffing execution

BOI promoted companies benefit from facilitated visa and work permit processing for foreign employees, although approvals remain subject to immigration and labor requirements. More flexible foreign-to-local staffing ratios allow faster deployment of key personnel, which supports project setup and knowledge transfer during the initial operating phase.

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Non-BOI structures face stricter thresholds and longer processing timelines, which can delay execution and increase reliance on local hiring before systems are fully established.

Setup timeline and execution risk

BOI approval typically requires 3 to 6 months, depending on project complexity and sector alignment, and may extend further for large or complex projects. The process requires submission of investment plans, feasibility studies, and supporting documentation. Applications can be modified or rejected, which introduces execution uncertainty before operations begin. Non-BOI company formation can be completed in 2 to 6 weeks with a predictable process. The timing gap creates a tradeoff between delayed entry with a potentially optimized structure and immediate entry with a structure that may require adjustment as constraints emerge.

Sector alignment and approval probability

BOI promotion is concentrated in sectors that support Thailand’s industrial strategy, including advanced manufacturing, digital technology, automation, electric vehicles, and green energy. Projects aligned with these sectors have a higher approval probability and access to longer incentive periods. Activities such as trading and basic services are less likely to qualify regardless of projected returns. Alignment with policy priorities determines whether the incentive framework is accessible before any financial benefit can be realized.

Post incentive tax exposure and compliance risk

After the 3-to-8-year incentive period ends, corporate income tax goes back to 20 percent, which increases the ongoing cost of running the business. Some projects may get a temporary 50 percent tax reduction for a limited period, depending on location or activity.

Reach out to Dezan Shira & Associates for tailored advice on structuring your business in Thailand

BOI companies must continue to meet specific conditions, including investment levels, approved business activities, and reporting requirements. If these conditions are not met, the incentives can be withdrawn, and previously exempt income may be taxed. This creates a risk that earlier tax savings can be reversed if compliance is not maintained.

Decision outcomes in practice

BOI is financially justified when capital expenditure exceeds US$5 million, and revenue is expected within 3 years, as tax savings and duty exemptions improve early cash flow and shorten payback time. It becomes less effective when investment is below US$1 million or when profitability is expected after year 5, as incentives may expire before meaningful earnings are generated, while compliance costs continue.

Non-BOI structures are more suitable when market entry is required within 1 to 2 months or when the business model needs flexibility to change activities. BOI structures are more suitable when full ownership control is required, and the business aligns with promoted sectors over a 5-to-10-year horizon.

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