M&A Earn-outs in Vietnam: Drafting, Enforcement & Tax-proofing Deferred Consideration

Executive summary and TL;DR

M&A earn-outs Vietnam deals sit at the intersection of a bridging-valuation tool and a moving regulatory target, and buyers and sellers should regularly revisit how they structure deferred consideration against the current Law on Enterprises and Law on Investment. An earn-out is a portion of the purchase price paid after closing, contingent on the acquired business hitting agreed financial or operational milestones. It aligns seller incentives with post-closing performance and allows the parties to close despite disagreeing on valuation. This guide explains how to draft enforceable clauses, how deferred payments interact with foreign ownership and approval rules, how earn-out disputes are resolved in Vietnam, and how to reduce tax leakage on staged payments.

Quick takeaways before you read further:

• Define measurement metrics with forensic precision, vague KPIs are the single biggest source of earn-out litigation.
• Confirm whether deferred consideration counts toward foreign ownership thresholds before you sign, because the settlement mechanism affects how post-closing payments are assessed.
• Choose arbitration for quantum disputes, but plan for local interim measures to preserve assets.
• Structure payment mechanics with tax recognition timing in mind, the difference between an earn-out, a vendor loan and an escrow release can shift the tax profile materially.

This guide is for general information only and is not legal advice. Always consult qualified counsel in Vietnam before executing a transaction.

1. What is an earn-out and when to use it in Vietnam

Definition and commercial purposes

An earn-out is a form of deferred consideration in which part of the purchase price is paid only if the target achieves defined performance benchmarks over a stated period after completion. Instead of paying the full price at closing, the buyer pays an upfront amount and commits to additional payments, the “earn-out”, triggered by revenue, EBITDA, customer retention, regulatory milestones or other measurable outcomes. The mechanism does three things at once: it bridges a valuation gap between an optimistic seller and a cautious buyer, it defers cash outflow for the buyer, and it keeps the seller economically motivated to hand over a healthy, growing business.

Deferred consideration Vietnam structures range from simple staged cash payments to complex multi-tranche formulas tied to audited accounts. The common structures include single-metric earn-outs (for example, a revenue threshold), tiered earn-outs that pay progressively more as performance improves, and cliff earn-outs that pay nothing unless a hard target is cleared. Each structure allocates performance risk differently, and the choice should follow the commercial logic of the deal rather than a template.

Typical deal scenarios in Vietnam

Earn-outs appear most often in three scenarios in the Vietnamese market. The first is cross-border private equity exits, where a fund selling a portfolio company wants to capture upside from a business it believes is still accelerating. The second is strategic buyouts, where an acquirer purchasing a Vietnamese operating company wants to protect against overpaying for projected synergies that may not materialise. The third is founder-retention deals, where the buyer conditions part of the price on the founders staying and hitting growth targets, ensuring continuity of relationships and know-how that are frequently concentrated in a handful of individuals.

In each of these scenarios, the earn-out must be reconciled with Vietnam’s foreign investment and corporate governance regime.

Pros and cons for buyers and sellers

For buyers, the earn-out defers cash, ties price to actual performance, and keeps sellers engaged. The downside is administrative burden, the risk of manipulation disputes, and potential deferred-tax and accounting complexity. For sellers, the earn-out can unlock a higher headline valuation and reward strong performance, but it transfers control risk: once the business is in the buyer’s hands, the seller depends on the buyer running it in good faith. The comparison table below sets out how earn-outs weigh against alternative post-closing payment mechanisms.

2. Comparison of post-closing payment mechanisms

Before drafting, decide whether an earn-out is genuinely the right instrument. The following table compares the main post-closing payments Vietnam practitioners use.

3. Key legal and regulatory issues

Overview of the Law on Enterprises and Law on Investment framework

Vietnam’s corporate and investment framework is governed principally by the Law on Enterprises and the Law on Investment, together with their implementing decrees and circulars, whose consolidated texts are published on the Ministry of Justice’s national legal database. For anyone structuring m&a earn-outs Vietnam transactions, three practical consequences follow: whether contingent future payments are treated as present ownership, whether triggering an earn-out requires a fresh approval or filing, and how post-closing investor changes must be notified to the licensing authorities.

Because the exact article numbers and implementing decrees can change, buyers and sellers should confirm the applicable provisions with the Ministry of Justice legal database and the relevant investment-registration authority before completion rather than relying on prior-year positions.

Foreign ownership thresholds and whether deferred consideration counts

Vietnam applies foreign ownership caps in a number of sectors, and the central question for any earn-out is whether a payment that has not yet crystallised counts toward the foreign investor’s stake. The practical test turns on when legal ownership of shares or capital transfers. Where the earn-out is a pure cash payment against shares already transferred at closing, the ownership position is fixed at closing and the deferred payment is simply a price adjustment.

Where, by contrast, the earn-out is settled in additional shares, or where share transfer is staged to track payment tranches, the additional equity may only count when it actually vests, and each tranche may need to be tested against the applicable sectoral cap at that time.

This distinction matters enormously in regulated sectors. If an earn-out settled in shares would push a foreign investor above a cap, the structure must be redesigned, for example by capping the equity component, converting the upside to cash, or using a warrant or option that only converts within the permitted headroom. The competent investment-registration authority’s guidance and the international overview maintained by UNCTAD’s Investment Policy Hub are useful reference points for identifying which sectors carry restrictions, but the definitive position must always be confirmed against the current law and Vietnam’s market-access commitments.

Corporate approvals and internal governance

Even where foreign ownership is not an issue, an earn-out typically requires internal corporate approvals on both sides. On the seller side, disposing of shares or assets may need shareholder or member consent depending on the company form and its charter. On the buyer side, committing to future contingent payments and to information rights over the target may require board or shareholder authorisation, and any change in the target’s capital or investor composition may require updates to the enterprise registration and, for foreign-invested entities, the investment registration certificate. Building these approvals into the conditions precedent avoids a scramble later.

Licensing, sectoral approvals and competition filings

Some earn-out mechanics can independently trigger regulatory filings. Where the transaction meets the economic-concentration notification thresholds under the Law on Competition, a filing with the National Competition Commission may be required before completion, and the staged nature of an earn-out does not remove that obligation, the assessment looks at the overall acquisition of control, not the payment schedule. Sector-specific approvals, for example in banking, telecommunications or other conditional sectors, may also apply where the earn-out changes the identity or size of the controlling foreign investor. The practical rule is to map every approval trigger against the whole deal, including future tranches, before signing.

4. Drafting practical earn-out clauses: a term-by-term playbook

Drafting sample, requires local legal review. The pointers and sample wording below are practitioner drafting aids, not off-the-shelf clauses. Every earn-out agreement Vietnam parties execute should be reviewed by qualified local counsel and reconciled with the current law.

Core economics and payment mechanics

Start by fixing the total consideration split: how much is paid upfront and how much is at risk in the earn-out. Decide whether the earn-out is paid in cash or shares, and whether it is a single payment or multiple tranches. Cash is cleaner from an ownership and enforcement perspective; shares create ownership-threshold and dilution questions. State the currency, the payment date mechanics, and the account into which payment must be made.

For cross-border deals, note that foreign exchange controls administered by the State Bank of Vietnam govern the flow and repatriation of investment proceeds, so the payment clause should require the parties to complete any registration or notification (including use of the required capital or investment accounts) needed to move funds.

Measurement period, KPIs and calculation methodology

The measurement provisions are where earn-outs live or die. Choose the metric deliberately: revenue is simple to measure but easy to inflate at the expense of margin; EBITDA aligns better with value but invites accounting disputes over adjustments; customer or operational metrics can work where financials are volatile. Whatever the metric, define it exhaustively. Specify:

• The exact accounting policies to be used, ideally by reference to the accounts as prepared at signing, so the buyer cannot change policy to depress the result.
• The data source, audited statutory accounts, management accounts, or a bespoke earn-out statement, and who prepares it.
• Audit and access rights giving the seller the right to inspect the working papers and to appoint an independent expert if the numbers are disputed.
• The measurement window, with clear start and end dates and rules for partial periods.

Ambiguity in any of these is the leading cause of earn-out litigation, so over-specify rather than leave gaps.

Governance, information rights and dispute prevention

Because the seller loses operational control at closing, the agreement should preserve enough visibility to detect manipulation early. Build in periodic reporting obligations, an agreed set of accounting policies that cannot be varied without consent, and, in larger deals, a joint monitoring committee that reviews performance against the KPIs during the earn-out period. Good governance provisions prevent disputes far more cheaply than litigation resolves them.

Conditions precedent versus conditions subsequent

Distinguish clearly between conditions that must be satisfied before the earn-out obligation arises (conditions precedent, such as regulatory approvals or the delivery of clean accounts) and conditions that, if they occur, unwind or reduce a payment already made (conditions subsequent, such as a post-completion breach of warranty). Confusing the two creates uncertainty over when money must move.

Payment mechanics: escrow, holdback, vendor loan and guarantees

Layer security appropriately, cross-referencing the comparison table above. An escrow with a Vietnamese or regional bank is the cleanest way to give the seller comfort that funds exist. A parent-company guarantee protects the seller where the buyer is a thinly capitalised acquisition vehicle. A pledge of shares can secure the seller’s position, though the enforceability of a pledge depends on proper perfection and registration where required. Choose the security package that matches the credit risk of the paying party.

Acceleration, clawback, anti-manipulation and anti-avoidance clauses

Protect both sides against opportunistic behaviour. Acceleration clauses cause the full earn-out to fall due on defined events, a sale of the target, a change of control, or a material breach by the buyer. Clawback clauses let the buyer recover overpayments where later information shows a target was not met. Anti-manipulation covenants prohibit the buyer from taking steps whose main purpose is to depress the earn-out metric, such as diverting revenue to an affiliate or loading the target with discretionary costs. A good-faith covenant to operate the business consistently with past practice underpins all of these.

Drafting traps and sample language

The recurring red flags are: undefined accounting terms, no independent-expert mechanism, no anti-manipulation protection, mismatched conditions, and payment clauses that ignore foreign-exchange registration. As a sample of the level of precision required, a revenue earn-out clause should state something to the effect that “the Earn-out Amount shall equal [X]% of Net Revenue in excess of [threshold] for the Measurement Period, calculated in accordance with the Agreed Accounting Policies set out in Schedule [ ], as certified in the Earn-out Statement.” Every bracketed term must then be defined elsewhere. Treat this only as a starting point for counsel review.

5. Approval, ownership and foreign investor implications

When earn-outs count as ownership

To answer the question directly, do earn-outs count toward foreign ownership limits?, the answer depends on the settlement mechanism. Where shares transfer in full at closing and the earn-out is a deferred cash adjustment, the foreign investor’s ownership is fixed at closing and the earn-out does not add to it. Where the earn-out delivers additional equity, that equity generally counts only when it vests, and each vesting must be tested against the applicable cap at that time. Filing timing follows the same logic: an equity-settled tranche that changes the foreign holding may require registration and notification when it vests, not at signing.

Impact on investor declarations, enterprise registration and change notifications

Any change in the foreign investor’s participation flows through to Vietnam’s registration and notification regime. Foreign-invested enterprises must keep their investment registration and enterprise registration current, and changes to shareholders or charter capital typically require filings within the periods set by law. Where an earn-out is settled in shares, plan the notification workflow for each tranche so that vesting does not leave the company out of compliance. The competent investment-registration authority (typically the provincial Department in charge of investment registration, or the management board of the relevant industrial or economic zone) is the reference point for investor registration and FDI procedures.

Structuring tips for foreign investors

Foreign investors should cap any equity component to stay within sector headroom, prefer cash settlement where a cap is close, use options or warrants that convert only within permitted limits, and build foreign-exchange registration steps into conditions precedent so that funds can lawfully move when payments fall due.

6. Enforcement, dispute resolution and remedies in Vietnam

Contractual remedies and interim measures

Are earn-outs enforceable in Vietnam? Yes, an earn-out is a contractual obligation and is enforceable like any other, provided it is drafted with clear, objectively determinable triggers. The practical challenge is not enforceability in principle but proving the quantum when performance is disputed. Contractual remedies include damages for breach, specific performance of the payment obligation, and, where the agreement provides, acceleration. To protect against dissipation of assets while a dispute runs, a claimant can apply for interim or provisional measures such as asset preservation, which are valuable where the paying party might otherwise move funds.

Arbitration versus Vietnamese courts for earn-out disputes

For earn-out disputes, which are typically technical, document-heavy quantum arguments, arbitration is usually preferable to litigation. Arbitration offers confidentiality, the ability to appoint arbitrators with financial expertise, and, for cross-border deals, more predictable enforcement of awards. Commercial arbitration in Vietnam is governed by the Law on Commercial Arbitration, and the Vietnam International Arbitration Centre (VIAC) is a commonly used institution. Vietnamese courts remain relevant for interim relief and for recognition and enforcement of awards. A well-drafted seller earn-out enforcement strategy pairs an arbitration clause for the merits with the ability to seek local interim measures to preserve the position while arbitration proceeds.

Evidence, audits and quantum disputes

Because earn-out fights turn on numbers, evidence discipline is decisive. The agreement should require the buyer to preserve the accounting records underlying the earn-out statement, grant the seller inspection rights, and provide for an independent accounting expert to determine disputed figures. Forensic accounting frequently decides these cases, so build the evidentiary architecture into the contract rather than hoping to reconstruct it later.

Practical timelines

Sellers should budget realistically. An expert-determination route can resolve a pure calculation dispute in a matter of months; a full arbitration on manipulation or breach can take considerably longer, and enforcement of an award adds further time. The lesson is that prevention, through precise drafting and monitoring, is almost always cheaper and faster than enforcement.

7. Tax and accounting treatment, how to tax-proof earn-outs

Income tax consequences for seller and buyer

How are earn-outs taxed in Vietnam? The central issue is the timing of income recognition. For the seller, the question is when the contingent portion of the price becomes taxable, at closing, when the earn-out crystallises, or when it is paid. The answer affects cash flow and the effective rate, and it turns on the guidance issued by the tax authorities and the Ministry of Finance on contingent consideration. For the buyer, the tax treatment of the deferred payment and any deductibility of related costs must be confirmed. Where the structure uses a vendor loan rather than a pure earn-out, transfer pricing rules can apply to the interest element, so the choice of mechanism has direct tax consequences.

VAT and withholding tax considerations

The parties must confirm whether the earn-out payment attracts value-added tax and whether withholding or capital-gains tax applies, particularly on cross-border payments to a foreign seller. The correct rate and withholding obligation depend on the nature of the payment, the residence of the recipient and any applicable double-tax treaty, and the applicable circulars issued by the tax authorities govern the analysis. Getting the withholding position wrong exposes the paying party to penalties, so the payment clause should allocate responsibility for any tax and specify whether payments are gross or net of withholding.

Accounting and contingent consideration

Contingent consideration raises accounting questions on both sides. Under Vietnamese accounting standards, and under IFRS where a group reports internationally, the earn-out is typically recognised as a liability at fair value with subsequent remeasurement, which can create earnings volatility. Sellers and buyers should align their tax advisers and auditors early so that the accounting treatment and the tax recognition timing are consistent and defensible.

Practical tax-proofing techniques and due diligence checklist

To reduce tax leakage on m&a earn-outs Vietnam transactions:

• Fix the tax characterisation of each payment in the contract and allocate withholding responsibility explicitly.
• Compare the tax profile of an earn-out, an escrow release and a vendor loan before choosing the mechanism, the timing of recognition differs.
• Confirm the withholding, capital-gains and VAT position with reference to current tax-authority and Ministry of Finance guidance and any applicable treaty.
• Build foreign-exchange registration steps into the timetable so cross-border payments clear without delay.
• Align the accounting and tax treatment of the contingent consideration across both parties.

8. Model clause library and drafting checklist

Drafting sample, requires local legal review. The following describes the components of a model earn-out package. Any template should be signed off by qualified counsel before use.

• Standard earn-out clause (revenue or EBITDA). A core payment formula with editable variables for the metric, threshold, percentage, and measurement period, cross-referring to defined accounting policies.
• KPI schedule. A structured schedule setting out each metric, its definition, its data source, and the calculation methodology.
• Escrow and security clause. Sample wording establishing an escrow account, release conditions, and any parent guarantee or pledge.
• Negotiation and documentation checklist. A step-by-step list covering approvals, foreign-exchange registration, notifications, tax allocation and dispute mechanics.

9. Practical negotiation playbook for buyers and sellers

Negotiation levers for buyers

Buyers should push for robust reporting and inspection rights, a cap on the total earn-out to limit exposure, escrow or guarantee-backed comfort only where they are the recipient of security, and firm anti-manipulation carve-outs that still allow them to integrate and run the business commercially.

Negotiation levers for sellers

Sellers should insist on tightly defined KPIs, fixed accounting policies that cannot be changed to their detriment, a realistic and adequately long measurement window, an independent-expert mechanism, and good-faith operating covenants that prevent the buyer from starving the business of the resources it needs to hit targets.

Timetable and milestones

Sequence the deal so that approvals, foreign-exchange registration and internal authorisations are conditions precedent, the measurement period begins on a clean date, reporting obligations run throughout, and the payment and dispute mechanics are triggered by objectively verifiable events. A clear timetable reduces friction at every payment date.

For deals structured as joint ventures rather than outright acquisitions, many of the same post-closing compliance considerations apply, see our related guide, Vietnam, Joint Venture: Essential Guide, for the joint venture perspective on ownership and governance.

Conclusion and next steps

M&A earn-outs Vietnam transactions reward precision and punish ambiguity. Because the way deferred consideration interacts with ownership thresholds, approvals and reporting depends on the current Law on Enterprises and Law on Investment and their implementing texts, the analysis you relied on in prior years should be revisited before each deal. Draft KPIs forensically, confirm whether equity-settled tranches count toward foreign ownership caps, choose arbitration backed by local interim measures for disputes, and structure payment mechanics with tax recognition timing front of mind. Done well, an earn-out closes the valuation gap and aligns both sides; done carelessly, it becomes the most litigated part of the deal.

To pressure-test your structure, have your draft earn-out clauses reviewed against the current law before you sign. For more on choosing counsel and related transactional support, see the Company practice area, Vietnam page and the Lawyer directory, Vietnam filtered to the Company practice.

Sources

1. Vietnam Law Database (VBPL), Ministry of Justice
2. Ministry (in charge) of Planning and Investment
3. Ministry of Finance (MOF), including the tax authorities
4. State Bank of Vietnam (SBV)
5. Vietnam International Arbitration Centre (VIAC)
6. UNCTAD, Investment Policy Hub (Vietnam)