How to Structure Earn‑outs, Escrows and Deferred Consideration in Thailand M&A: Tax, Withholding and Nominee‑risk Solutions

Thailand’s 2026 enforcement wave, tighter nominee‑verification orders from the Department of Business Development (DBD) and the Ministry of Commerce (MOC), combined with heightened merger‑control scrutiny, has reshaped how deal teams must design deferred‑payment mechanics in acquisitions. For any buyer, seller or PE sponsor negotiating contingent consideration, the central compliance question is now unavoidable: Will this earn‑out, escrow or deferred payment trigger Thai withholding tax, income‑tax reclassification or nominee‑enforcement action? This tax‑first playbook on earn‑out tax in Thailand provides the definitive structuring framework, covering characterisation rules, withholding and VAT calculations, escrow‑account design, beneficial‑owner checks, and model clauses, that practitioners need to close deals safely under the current regime.

Every recommendation below should be verified with qualified Thai tax counsel before implementation, as individual circumstances will vary.

The 48‑Hour Post‑Close Compliance Decision

Before the closing dinner is booked, deal teams should have answers to three questions that determine the tax and regulatory trajectory of every deferred payment. Failure to resolve these within the first 48 hours post‑close dramatically increases audit exposure and the risk of recharacterisation.

• Step 1, Identify the payer and the beneficial owner. Confirm the entity making payments and, critically, the ultimate beneficial owner receiving them. Post‑2026 DBD nominee checks mean that any opacity in the ownership chain can trigger an investigation. Map the payment flow from buyer entity → escrow agent → seller entity → ultimate individual or fund.
• Step 2, Choose the escrow and withholding model. Decide between a Thai‑bank trust account, an offshore escrow, or a third‑party trustee structure. Each carries different withholding obligations, repatriation requirements and nominee‑risk profiles. Lock in the model in the share purchase agreement (SPA) before closing.
• Step 3, Document transfer pricing and indemnities. Prepare contemporaneous transfer‑pricing documentation supporting the allocation between purchase price and any post‑closing service element. Execute tax warranties and post‑closing tax indemnities that specify the indemnity waterfall, escrow‑release triggers and dispute‑resolution mechanism.

Thailand M&A Tax Structuring: The Regulatory and Tax Landscape

2026 Nominee‑Verification Changes (DBD/MOC)

The DBD, operating under the MOC, has progressively tightened nominee verification Thailand requirements. Under the Foreign Business Act B. E. 2542 (1999) and subsequent ministerial orders, Thai companies with foreign involvement must demonstrate that Thai shareholders are genuine beneficial owners, not nominees holding shares on behalf of foreign parties. The 2026 enforcement orders expanded the scope of verification, requiring companies to produce updated shareholder registers, source‑of‑funds evidence and board‑resolution trails upon demand. For M&A transactions, this means any deferred payment routed through a Thai intermediary entity will face immediate scrutiny if the DBD suspects nominee arrangements. Practitioners should review the latest DBD and MOC orders directly for specific documentary thresholds.

For a broader discussion of these enforcement measures, see our coverage of how foreign property owners can protect themselves in Thailand after the 2026 nominee company crackdown and the updated overview of the Thailand Foreign Business Act (2026).

Merger Control Trends

Thailand’s Trade Competition Commission (TCC) has signalled closer review of acquisition structures that use complex deferred‑consideration arrangements. While merger notification thresholds remain revenue‑based, the TCC increasingly examines post‑closing payment structures, including earn‑outs tied to market‑share metrics, as indicators of ongoing economic control. Deal teams should factor TCC notification timing into escrow‑release schedules.

Thai Tax System Overview: Capital Gains, Income Tax and WHT Basics

Thailand does not impose a separate capital gains tax. Instead, gains from the sale of shares or assets are folded into the seller’s ordinary income and taxed under the Revenue Code. For Thai corporate sellers, this means corporate income tax (CIT) at 20 per cent on net profits. For individual Thai sellers, gains are subject to progressive personal income tax (PIT) rates of up to 35 per cent. Non‑resident sellers face withholding tax (WHT) on Thailand‑sourced income, with rates that depend on the character of the payment and any applicable double‑taxation agreement (DTA). The standard WHT rate on service fees paid to non‑residents is 15 per cent, while dividends attract 10 per cent WHT before treaty relief.

Value Added Tax (VAT) at 7 per cent applies to services performed in Thailand. These rates are published by the Thai Revenue Department.

What is deferred purchase price consideration? Deferred consideration is any portion of the purchase price not paid at closing, typically a fixed sum payable on a set date. An earn‑out, by contrast, is contingent consideration whose amount depends on the target’s post‑closing performance against agreed metrics (revenue, EBITDA, customer retention). The tax treatment of each turns on characterisation: purchase price, income, or service compensation.

Earn‑Out Tax Thailand: How Earn‑Outs and Deferred Consideration Are Taxed

Characterisation: Purchase Price vs Income vs Service Compensation

The single most consequential tax decision in any Thai M&A earn‑out is characterisation. Thai tax authorities will examine substance over form. If the earn‑out is documented as additional purchase price for shares, the seller reports it as proceeds of sale. If, however, the seller retains operational control or provides management services during the earn‑out period, the Revenue Department may recharacterise the payment as service remuneration, taxable as ordinary income and subject to WHT. Industry observers expect this recharacterisation risk to intensify as the Revenue Department aligns its enforcement posture with the broader anti‑nominee campaign.

• Purchase‑price treatment (preferred). Document the earn‑out as part of the share‑sale consideration. The SPA should state that all contingent payments constitute deferred purchase price. Board resolutions, valuation reports and arm’s‑length pricing evidence reinforce this position.
• Service‑compensation risk (avoid). If the seller is required to remain as a senior executive, hit performance targets personally, or is subject to non‑compete payments bundled with earn‑out milestones, authorities may reclassify the earn‑out as assessable employment or service income, attracting PIT up to 35 per cent and employer social‑security obligations.
• Hybrid arrangements. Where some seller involvement is commercially necessary, ring‑fence the service element in a separate consulting agreement with its own arm’s‑length fee. This firewall reduces the risk that the entire earn‑out is recharacterised.

Timing and Source Rules

Under the Thai Revenue Code, income is generally assessable when it is received or becomes receivable. For earn‑outs, this means the seller may owe tax in the year a milestone is achieved and the payment becomes due, not at closing. Non‑residents are taxed only on Thailand‑sourced income. If the shares being sold are in a Thai company (or derive their value substantially from Thai assets), the earn‑out is almost certainly Thailand‑sourced, regardless of where the payment is actually received.

Worked Example: Domestic Seller vs Foreign Seller

Scenario: Buyer acquires 100 per cent of a Thai target for THB 100 million at closing, plus an earn‑out of up to THB 30 million payable if EBITDA exceeds THB 50 million in year one. The seller’s original cost base is THB 40 million.

Domestic corporate seller (Thai company):

• Closing gain: THB 100m − THB 40m = THB 60m, taxed at 20% CIT = THB 12m CIT.
• Earn‑out (if THB 30m triggers): additional gain of THB 30m, taxed at 20% CIT = THB 6m CIT in year of receipt.
• No WHT applies on the earn‑out payment because the seller is a Thai resident entity.

Foreign corporate seller (non‑resident, no DTA):

• Closing gain: same THB 60m. Thai buyer must withhold tax at the applicable rate. If the payment is characterised as proceeds of a share sale (capital gain), the WHT treatment depends on whether the Revenue Department treats the gain as assessable income derived in Thailand. For service fees, the default WHT rate is 15 per cent.
• Earn‑out (THB 30m): if treated as purchase price and the gain is Thailand‑sourced, buyer withholds at the applicable rate (typically 15 per cent absent a DTA = THB 4.5m). If a DTA applies (e.g., Thailand–Singapore, Thailand–Japan), the rate may be reduced or eliminated depending on the treaty’s capital‑gains article.
• The buyer must file a WHT return (Form PND 54) and remit the withheld amount to the Revenue Department within seven days of the payment month.

Treaty Considerations and Documentation

Thailand has an extensive DTA network. Many treaties allocate taxing rights over capital gains from share sales to the seller’s residence country, potentially eliminating Thai WHT. However, treaties frequently include a “land‑rich” or “immovable property” exception: if more than 50 per cent of the target’s asset value derives from Thai immovable property, Thailand retains taxing rights. For cross‑border earn‑out tax planning, sellers should obtain a tax‑residency certificate from their home jurisdiction and provide it to the Thai buyer before the first deferred payment is made.

Withholding Tax, VAT and Cross‑Border Earn‑Out Payment Flows

WHT Rates by Payment Type

The withholding tax earn‑out Thailand framework depends entirely on how the payment is characterised. The table below summarises the key distinctions.

VAT on Services and Cross‑Border Earn‑Outs

If any element of the earn‑out is characterised as consideration for services performed in Thailand, VAT at 7 per cent applies. The Thai buyer (as the payer) is required to self‑assess reverse‑charge VAT on service fees paid to non‑residents. This is an additional cost that must be modelled into net‑proceeds calculations for the seller. Where the earn‑out is purely deferred purchase price for shares, no VAT applies.

Practical Routing: Thai Bank Escrow vs Offshore Escrow

Holding deferred consideration in an escrow holding Thailand structure, a Thai commercial‑bank trust account, provides the strongest documentary trail for Revenue Department audits. Offshore escrows (e.g., Singapore or Hong Kong trust accounts) may be commercially preferred by foreign sellers but create repatriation complexity and weaken the evidentiary chain for Thai tax purposes. Industry observers expect the Revenue Department to view offshore escrows with greater suspicion, particularly where nominee entities are involved in the flow.

Treaty Relief and the Protective WHT Gross‑Up Clause

Where a DTA reduces or eliminates Thai WHT, the SPA should include a mechanism for the buyer to apply the treaty rate at source, supported by the seller’s tax‑residency certificate. A protective gross‑up clause should require the buyer to pay additional amounts so that the seller receives the full earn‑out net of any unanticipated WHT. This shifts the risk of Revenue Department reclassification to the buyer, a negotiation point that often determines whether the deal closes on agreed economics.

Escrow, Holdback Mechanics and Nominee‑Risk: A Practical Playbook

Escrow Account Types: Pros and Cons

• Thai commercial‑bank trust account. Strongest for local regulatory compliance and Revenue Department audit trails. The bank acts as custodian under a tripartite escrow agreement. Limitations: relatively high fees, limited flexibility for multi‑currency transactions, and the bank may require extensive KYC on all parties.
• Omnibus escrow (international bank, Thai branch). Balances local compliance with cross‑border flexibility. Suitable for deals with multiple tranches and currencies. Requires careful structuring to ensure the Thai branch can satisfy local WHT withholding obligations.
• Third‑party trustee (law firm or licensed trust company). Maximum flexibility in release mechanics and dispute‑resolution procedures. The trustee can be instructed to perform beneficial‑owner verification before releasing funds. Risk: the trustee must be licensed or otherwise authorised under Thai law to hold client funds.

Escrow Triggers and Release Mechanics

Escrow release should be tied to objectively verifiable events to minimise disputes. Recommended triggers include:

• Delivery of audited financial statements confirming earn‑out metric achievement.
• Confirmation by buyer (or independent accountant) that no indemnity claim is pending.
• Evidence that all WHT obligations have been satisfied (buyer to provide PND 54 filing receipts).
• Beneficial‑owner certification from the seller, refreshed at each release date.

Beneficial‑Owner Verification and KYC/DBD Checks

The nominee verification Thailand regime demands that escrow instructions include specific beneficial‑owner verification steps. The following checklist should be embedded in the escrow agreement:

• Do: Require the seller to certify its ultimate beneficial ownership at signing and at each escrow release. Include a representation that no nominee arrangement exists with respect to the seller’s shareholding or its entitlement to receive earn‑out payments.
• Do: Instruct the escrow agent to perform independent KYC, including source‑of‑funds verification and cross‑referencing the DBD’s shareholder register for the target company.
• Do: Require prompt notification to the buyer if the escrow agent identifies any discrepancy or if the DBD issues a nominee‑investigation notice affecting any party.
• Don’t: Route payments to shell entities or companies whose shareholders are not identifiable through public registers.
• Don’t: Allow the seller to redirect earn‑out payments to a different entity post‑closing without full KYC re‑verification and buyer consent.
• Don’t: Rely solely on the seller’s self‑certification, independent verification by the escrow agent is essential given the current enforcement climate.

The typical escrow flow proceeds as follows: (1) buyer deposits earn‑out funds with the Thai escrow agent at closing or upon milestone confirmation; (2) the escrow agent holds funds in a segregated account, performs BO verification and confirms WHT compliance; (3) upon delivery of audited metrics, absence of indemnity claims, and refreshed BO certification, the escrow agent releases funds to the seller (net of any WHT); (4) the buyer files PND 54 with the Revenue Department confirming the withholding.

Drafting Playbook: Model Clauses for Earn‑Out Tax Thailand Compliance

Model Earn‑Out Clause (Metrics, Measurement Period, Caps)

“The Contingent Consideration shall be calculated as [X]% of the Target’s audited EBITDA for the Measurement Period (1 January 20[XX] to 31 December 20[XX]), less the EBITDA Threshold of THB [Y] million, subject to a maximum aggregate Contingent Consideration of THB [Z] million (the ‘Cap’). The Contingent Consideration shall constitute additional purchase price for the Sale Shares and shall not be characterised as compensation for services, employment remuneration or any other payment.”

Drafting note: Expressly characterising the earn‑out as purchase price is essential for Thai tax purposes. Include a separate recital confirming that the seller has no obligation to provide services during the Measurement Period as a condition of earning the Contingent Consideration.

Escrow Trustee Instruction Clause

“The Escrow Agent shall release the Escrow Amount (or the relevant portion) to the Seller within [10] Business Days of receipt of: (a) the Earn‑Out Certificate signed by the Independent Accountant; (b) written confirmation from the Buyer that no Indemnity Claim Notice has been delivered; (c) evidence of WHT compliance (PND 54 filing receipt); and (d) a refreshed Beneficial Ownership Certificate from the Seller.”

Drafting note: The requirement for a refreshed BO certificate at each release addresses the 2026 nominee‑verification regime. The escrow agent should be authorised (but not obligated) to withhold release if it has reasonable grounds to believe a nominee arrangement exists.

WHT Gross‑Up and Protective Indemnity Clause

“If any Deduction is required by law to be made from any payment of Contingent Consideration, the Buyer shall pay such additional amount as is necessary to ensure that the Seller receives a net amount equal to the full amount of the Contingent Consideration that would have been receivable had no such Deduction been required. The Buyer shall indemnify the Seller against any Tax assessed on the Seller arising from the Buyer’s failure to withhold and remit WHT in accordance with the Revenue Code.”

Drafting note: Buyers will typically resist an uncapped gross‑up. Negotiate a cap equal to the difference between the treaty‑rate WHT and the domestic‑rate WHT, so the gross‑up applies only if the Revenue Department successfully challenges treaty relief. This limits buyer exposure while protecting the seller’s net economics.

Tax Warranty and Post‑Closing Indemnity Clause

“The Seller warrants that all payments received under this Agreement constitute purchase consideration for the Sale Shares and that the Seller has not entered into, and will not enter into, any arrangement that would cause any such payment to be recharacterised as service income, employment income or any other category of assessable income under the Revenue Code.”

Drafting note: Pair this warranty with a post‑closing tax indemnity requiring the seller to hold the buyer harmless for any additional tax, penalties or interest arising from a successful recharacterisation claim by the Revenue Department. Specify that indemnity claims may be satisfied first from the escrow balance before recourse to the seller directly.

Caution, seller retention of control: If the seller retains board seats, exercises veto rights over operational decisions, or provides management services during the earn‑out period, the entire structure is vulnerable to recharacterisation. Limit the seller’s post‑closing involvement to information rights and observer status only.

Post‑Closing Governance, Audits and Dispute Avoidance

Audit Rights and Access to Accounts

The seller should negotiate audit rights over the target’s financial records during the earn‑out Measurement Period. Standard provisions grant the seller (or its appointed accountant) access to the target’s books, records and management for the purpose of verifying earn‑out metrics. The buyer should cooperate in good faith but may restrict access to commercially sensitive information unrelated to the earn‑out calculation.

Expert Determination for Earn‑Out Measurement Disputes

Arbitration is often too slow and expensive for earn‑out measurement disputes. Expert determination, appointing an independent Big Four accounting firm to resolve disputes over metric calculations, is faster and binds both parties. The SPA should specify the appointing body, the expert’s terms of reference and the timeline for determination (typically 30–60 days). The expert’s decision on the calculation should be final and binding absent manifest error.

Escrow Claims Process and Indemnity Waterfall

A clear indemnity waterfall prevents procedural disputes from derailing post‑closing relations. The recommended sequence is: (1) buyer delivers an indemnity‑claim notice specifying the breach and estimated loss; (2) seller has a response period (typically 20–30 business days); (3) if the claim is undisputed, the escrow agent deducts the claimed amount from the next scheduled release; (4) if disputed, the contested amount remains in escrow pending expert determination or arbitration; (5) any remaining escrow balance is released to the seller after expiry of the final indemnity period (typically 18–24 months post‑closing).

Sources

1. Thai Revenue Department, Personal & Corporate Tax Rules
2. Tilleke & Gibbins, Thailand Tax Guide
3. PwC Tax Summaries, Thailand
4. ICAEW, Earn‑Out Agreements Guidance
5. Thai Revenue Department, VAT Guidance
6. Global Law Experts, How Foreign Property Owners Can Protect Themselves in Thailand (2026 Nominee Crackdown)
7. Global Law Experts, Thailand Foreign Business Act (2026)