Can a foreigner own a Thai company without Thai partners? Yes—there are several legal paths. Each has conditions, costs, and limits. Here’s a clear rundown so you can pick the route that actually fits your business model.

The main options

1) Foreign Business License (FBL)

What it is: Permission under the Foreign Business Act (FBA) to operate restricted “service” activities with foreign majority ownership.

When it fits: You’re not BOI-eligible and not covered by an exemption (export, manufacturing, etc.), but you still want 100% foreign ownership.

Notes

• Discretionary review; plan detailed business rationale, benefits to Thailand (technology, jobs, training).

• Capital requirements apply (and must be paid-in per the approval schedule).

• Timeline: several months is normal; varies by activity and province.

• Some activities are unlikely to get licensed; early feasibility check saves time.

2) BOI promotion → then FBL certificate

What it is: If your activity is on the BOI’s eligible list and you meet the conditions (Thai staffing, investment, operations in Thailand), BOI can grant promotion. With the BOI certificate, you obtain an FBL certificate (typically a simpler process than an FBL without BOI).

Why choose it

• 100% foreign ownership, easier visas/work permits, and in many categories—tax and duty incentives.

• Clearer path to operate services that would otherwise need a hard FBL.

Key checks

• Confirm your category on the BOI list.

• Model Thai headcount/salaries and 12-month “start of operations” timeline.

• Keep scope focused on development/production/support (not pure trading unless the category allows it).

3) U.S.–Thailand Treaty of Amity

What it is: U.S. citizens/majority-owned companies can hold 100% of a Thai company under the Treaty, subject to restricted sectors.

Good for

• U.S. founders who aren’t BOI-eligible.

• Service businesses that can pass the Amity review.

Caveats

• Still restricted in certain sectors; a Foreign Business Certificate (not the same as an FBL) is issued.

• Ownership/control must remain American under the Treaty’s rules.

• Not a land-ownership shortcut.

4) Representative Office (RO)

What it is: A non-revenue entity for market research, sourcing, quality control, after-sales reporting, etc. No sales, no invoices in Thailand.

When to use

• You need people on the ground, but all revenue is booked offshore.

• You’re testing the market before a revenue entity.

Limits

• Strict activity list; costs only (no income).

• Converting to a revenue company later requires a new structure (BOI/FBL/partnered Co., etc.).

5) Activities outside FBA restrictions (no FBL)

Some activities are exempt from the FBA’s foreign-ownership limits. Common examples:

• Export only (no domestic trading).

• Manufacturing for domestic/export sales.

• Wholesale/retail when a company meets high paid-up capital thresholds (e.g., ≥ THB 100m—check current rules).

• Certain hotel management cases under specific regulations.

If you fit an exemption, you can often register a 100% foreign-owned company without BOI/FBL. Always confirm with the DBD/Licensing authority before acting.

“If there are options, why do many still add Thai partners?”

Because each route has constraints. If you’re not American (no Amity), don’t want non-revenue limits (RO), and are not clearly exempt, you typically compare FBL vs BOI→FBL. BOI is popular because it can streamline licensing and immigration and sometimes adds tax benefits—if you can meet the staffing/investment conditions.

Choosing your path (quick framework)

1. Map your activity (service, manufacturing, export, trading, software, R&D, etc.).

2. Check exemptions (manufacturing/export/high-capital retail). If exempt → standard company registration may suffice.

3. Check BOI categories. If eligible and you can meet conditions → BOI → FBL certificate.

4. If not BOI/exempt: assess a direct FBL (prepare strong rationale and capital plan).

5. If U.S. majority: consider Amity.

6. If testing the market/ops only: use a Representative Office.

Mini-FAQ

Is BOI mandatory for 100% foreign ownership?
No. It’s one path. Others include FBL, Amity (for U.S. persons), or exempt activities.

Is FBL faster with BOI?
Generally yes. The BOI certificate tends to make the licensing step more straightforward than a standalone FBL.

Can I sell domestically without FBL/BOI?
Only if your activity is outside FBA restrictions (e.g., manufacturing) or you meet a defined exemption (such as high-capital retail). Otherwise you need BOI or FBL.

What if I need to start lean?
Consider RO (no revenue) or start with an exempt activity; later upgrade to BOI/FBL as the model matures.

Helpful services

• Company setup in Thailand (structures, exemptions, BOI/FBL pathfinding):
  https://integro.asia/register-a-company-in-thailand-a-comprehensive-guide/

• Accounting & compliance (capital planning, payroll, immigration support coordination):
  https://integro.asia/services-accounting-services-in-thailand-integro/