Mergers & Acquisitions Lawyer in Thailand

Mergers & Acquisitions Lawyer in Thailand

Foreign ownership limits, licence transferability and undisclosed liabilities decide more deals than price does. We act for international acquirers, sellers and investors.

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StructuringShare sale, asset sale or JV
ClearanceFBA, BOI and competition
Full cycleTerm sheet → integration

Deal Structuring

Share purchase, asset purchase, merger or joint venture, assessed against foreign ownership limits, tax and licence continuity.

Legal Due Diligence

Corporate, contractual, employment, real estate, IP, licensing, litigation and regulatory review, reported by risk rather than by volume.

Transaction Documents

Term sheets, SPAs, shareholders’ agreements, warranties, indemnities, escrow and earn-out mechanics drafted for enforceability in Thailand.

Regulatory Clearance

Foreign Business Act analysis, BOI implications, sector licences and, where thresholds are met, trade competition notification.

Joint Ventures

Control mechanics that work in practice: reserved matters, board composition, deadlock, transfer restrictions and exit rights.

Completion & Integration

Conditions precedent, closing mechanics, share register and DBD filings, and post-completion licence and employment transitions.

Share Sale or Asset Sale in Thai M&A

Signing documents for mergers and acquisitions in Thailand

Mergers and acquisitions in Thailand start with one choice. In a share purchase you acquire the company and, with it, everything the company has ever done. An asset purchase instead takes selected assets and leaves most historic liability behind. However, it also leaves behind whatever attaches to the legal entity: licences, permits, leases, tax attributes and often key contracts.

Here the choice carries weight beyond the usual reasons. Many operating licences do not transfer. The buying entity must apply afresh, which can mean months of downtime. Land held by the target keeps the same registered owner in a share sale. Land Office transfer fees and specific business tax therefore do not arise. In exchange, however, the buyer inherits the company’s full history, including any nominee exposure.

ConsiderationShare purchaseAsset purchase
Historic liabilityInherited in fullLargely left behind
Licences and permitsUsually continue with the entityOften require fresh application
Land held by targetNo Land Office transferRegistrable transfer, fees and tax apply
EmployeesContinue automaticallyRequire transfer with consent and preserved terms
Contract counterpartiesUsually unaffected, subject to change-of-control clausesNovation or assignment generally needed
Diligence burdenHeavy — the whole entityNarrower — the assets acquired
Key Takeaway: Decide the structure before you agree a price, not after. Ultimately the structure determines the diligence scope, the tax cost, the regulatory timetable and the warranty package. As a result, reversing it late usually costs a re-negotiation.

Foreign Ownership Limits on Mergers and Acquisitions in Thailand

Above all, the Foreign Business Act restricts majority foreign participation in a long list of service and trading activities. It is administered by the Department of Business Development. As a result, an acquisition that pushes foreign shareholding past 50% can turn a lawfully operating Thai company into one that needs a foreign business licence. In some cases it cannot lawfully continue its current activities at all.

Fortunately, several legitimate routes exist: a foreign business licence, BOI promotion, treaty rights such as the US-Thai Amity Treaty, or restructuring the activity itself. By contrast, a nominee arrangement dressed up as a shareholding does not work. It is unlawful, and enforcement now detects it far more often. Therefore we identify which route is available before you sign the term sheet, because that answer drives the entire timetable.

Key Takeaway: Above all, establish the foreign ownership route at term sheet stage. Meanwhile a licence application or BOI approval can add months to completion. Buyers who discover this during diligence lose leverage precisely when they need it most.

Our Process for Mergers and Acquisitions in Thailand

  1. Structuring and feasibility. Ownership limits, licence transferability, tax and the realistic regulatory timetable, delivered before you commit commercially.
  2. Term sheet. Price mechanism, exclusivity, conditions, and the key protections agreed in principle while you still have negotiating leverage.
  3. Due diligence. A risk-ranked report that tells you what to walk away from, what to price, and what to cover by warranty or indemnity.
  4. Documentation and negotiation. SPA, disclosure letter, shareholders’ agreement and ancillary documents, negotiated against the diligence findings.
  5. Completion and post-closing. Conditions satisfied, closing executed, statutory filings made, and licence, employment and contract transitions managed.

Why Acquirers Choose Us for Mergers and Acquisitions in Thailand

Risk-Ranked Reporting

Our reports open with what could kill or reprice the deal, rather than a hundred pages of findings.

Regulatory Fluency

FBA, BOI, sector licensing and competition notification handled by the same team advising on the deal.

Enforceable Drafting

We draft warranty and indemnity packages for how Thai courts and tribunals actually treat them.

Litigation-Informed

We run disputes, so we know which clauses fail under pressure and draft accordingly.

Integrated Support

Company registration, work permits, tax and accounting available in-house for the post-completion phase.

Sell-Side Preparation

We clean up share registers, filings and nominee exposure first, so that diligence does not destroy your price.

Frequently Asked Questions

How long does an M&A transaction take in Thailand?
Thailand does not set a single statutory timetable for a private M&A transaction, so no fixed duration applies across deals. What the law does fix are the timetables for the regulatory steps that can apply: under section 51 of the Trade Competition Act, a merger that may cause a monopoly or a dominant position needs the Trade Competition Commission’s approval before completion, reviewed within ninety days of application and extendable by fifteen days, while a merger that only crosses the post-merger notification threshold must be notified within seven days after completion. Where a foreign business licence or BOI approval also applies, each runs on its own separate process. Confirm which of these apply to a specific transaction before fixing a closing date.
Is a share sale always more tax-efficient?
Not always. A share sale avoids Land Office transfer fees and specific business tax where the target holds property, and attracts stamp duty on the share transfer instrument. However, the sellers pay tax on their gains, non-resident sellers can face withholding, and buyers routinely discount for inherited history. For that reason, model both structures with real numbers before choosing.
What usually goes wrong in Thai due diligence?
Diligence on a Thai target should specifically test for: undocumented shareholder arrangements and nominee exposure, licences that turn out to be non-transferable, land or leases held on terms that do not match what was represented, unrecorded employee entitlements including accrued severance, and related-party contracts on non-commercial terms. None of these are exotic, and a properly scoped diligence exercise finds them before signing.

Structuring mergers and acquisitions in Thailand

Does the acquisition need competition clearance?
Thailand’s Trade Competition Act, administered by the Trade Competition Commission of Thailand, requires post-merger notification or prior Commission approval where a merger meets the thresholds section 51 sets out. See our guide to Trade Competition Commission merger review below for the specific tests and deadlines. Run the analysis for a specific transaction early rather than assume it falls outside scope, because sections 80 and 81 penalise a merger that proceeds without the required notification or approval.
Can we acquire a Thai company and keep foreign control?
Often yes, but the route depends on the target’s activities. Options include obtaining a foreign business licence, acquiring through a BOI-promoted entity, relying on treaty rights where the acquirer qualifies, or restructuring so that restricted activities sit in a separately owned entity. We assess which is realistic before you sign a term sheet.
Do you act for sellers as well as buyers?
Yes. Moreover, sell-side work is often the higher-value engagement, because preparing a company for diligence — cleaning up filings, share registers, contracts and licensing — protects the price far more effectively than negotiating hard after the buyer’s lawyers have found the problems.
What happens to employees on completion?
In a share purchase the employer does not change, so employment continues on existing terms. By contrast, employees do not transfer automatically in an asset purchase. Transfer needs employee consent and continuity of terms, and you must address accrued entitlements including service-based severance. This is a frequent source of unbudgeted cost.
What is the deadline to notify the Trade Competition Commission after completing a merger?
Seven days after completion, under section 51, paragraph 1 of the Trade Competition Act, where the merger may substantially lessen competition without causing a monopoly or a dominant position. Missing the deadline exposes the merging parties to the administrative fine section 80 sets, which continues to accrue on a daily basis until notification is made.
What happens if a merger is completed without required Commission approval?
Completing a merger that needed prior approval under section 51, paragraph 2 without obtaining it exposes the parties to the administrative fine section 81 sets, calculated as up to 0.5 percent of the transaction value. The Commission’s power to review is not limited to deals that asked for approval; it can examine a completed merger that should have sought approval and did not.

How does Trade Competition Commission review apply to a merger or acquisition?

Definition. Under section 51 of the Trade Competition Act B.E. 2560 (2017), a “merger” covers a business combination leaving one business standing, an acquisition of assets to control another business’s policy or management, and an acquisition of shares, direct or indirect, for the same purpose. All three forms can trigger a Trade Competition Commission process, and which process applies depends on what the merger does to competition in the relevant market.

Section 51 sets two separate gates, and a Thai M&A transaction can sit in either, both, or neither. A merger that may cause a monopoly or result in a dominant position in a market needs the Commission’s approval before completion; a merger that may only substantially lessen competition, without reaching monopoly or dominance, is instead subject to a post-merger notification after completion. The two gates run on different clocks and carry different consequences for missing them.

Prior approval (section 51, para. 2)Post-merger notification (section 51, para. 1)
TriggerMerger may cause a monopoly or a dominant market positionMerger may substantially lessen competition, without reaching monopoly or dominance
TimingBefore completionWithin 7 days after completion
Commission review period90 days from application, extendable by 15 daysNot applicable; a notification, not an approval
Penalty for non-complianceAdministrative fine of up to 0.5 percent of the transaction value, under section 81Administrative fine of up to 200,000 baht plus up to 10,000 baht per day of continuing non-compliance, under section 80
Key takeawayThe foreign-ownership consent process and the Trade Competition Commission process test different things on different clocks. A deal that is entirely clean on foreign ownership can still owe the Commission a notification within 7 days of completion, and that deadline runs regardless of how long the ownership side of the transaction took.

This is where the ownership analysis above and the competition analysis interact, and it is a sequencing point worth building into the transaction timetable rather than discovering at completion. A structure cleared under the Foreign Business Act, a BOI promotion, or a treaty right addresses who may own the target. It says nothing about whether the Trade Competition Commission needs to see the deal, because section 51 measures market impact, not ownership. A buyer that treats foreign-ownership clearance as the only regulatory item can complete a deal that is lawful on ownership grounds and still non-compliant on notification, which is precisely what sections 80 and 81 penalise.

Last reviewed: 28 September 2026. This article describes the framework in force under the Trade Competition Act B.E. 2560 (2017) and its subordinate notifications. Whether a specific transaction meets the monopoly, dominance, or substantial-lessening thresholds depends on the relevant market and the parties’ position in it, which requires a transaction-specific analysis; this is general information, not legal advice.

Planning an Acquisition or an Exit in Thailand?

Lex Bangkok advises international acquirers, sellers and investors on structuring, due diligence, regulatory clearance and completion. Send us the target profile and we will set out the realistic route and timetable.

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