Earn-Out and VAM: Two Bridging Mechanisms for Valuation Gaps in M&A

When a buyer and seller cannot agree on what a Vietnamese target company is really worth, earn-out and VAM in Vietnam structures have become the two most common tools for bridging that valuation gap without killing the deal. Both defer part of the purchase price to a future date, tying final consideration to the target’s actual performance.

They are legally distinct, however, and carry very different enforceability risks under Vietnamese law. This article explains how each mechanism works and how dealmakers structure earn-out and VAM in Vietnam clauses that hold up.

Table of Contents

• What Are Earn-Out and VAM in Vietnam M&A Deals?
• Why Dealmakers Use Earn-Out and VAM in Vietnam Transactions
• Earn-Out vs VAM: Key Differences
• Legal Enforceability of Earn-Out and VAM in Vietnam
• Drafting Techniques That Strengthen Earn-Out and VAM in Vietnam Clauses
• Tax Implications of Earn-Out and VAM Payments in Vietnam
• Dispute Resolution for Earn-Out and VAM in Vietnam Transactions
• Frequently Asked Questions

What Are Earn-Out and VAM in Vietnam M&A Deals?

In Vietnamese M&A practice, earn-out and VAM in Vietnam transactions typically surface whenever a buyer and a founder-seller cannot agree on a single valuation number. Instead of walking away, the parties split the price into a fixed upfront payment and a variable component that depends on what actually happens after closing. The two mechanisms achieve this in different ways, and understanding the difference matters as much for tax and accounting treatment as it does for enforceability.

How an Earn-Out Is Typically Structured

An earn-out is contingent consideration: part of the purchase price is withheld at closing and paid out later only if the target hits agreed post-closing financial performance targets. Typical structures include:

• Revenue or EBITDA thresholds measured over one to three fiscal years following completion;
• Operational KPIs, such as new store openings, licensed project milestones, or regulatory approvals in real estate and infrastructure deals;
• Tiered payout schedules, where the additional consideration scales proportionally between a floor and a cap; and
• Clawback or deferred escrow arrangements, where a portion of the initial price is held back rather than added on top.

Key takeaway: An earn-out moves money toward the seller if performance exceeds the base case — it rewards outperformance rather than penalizing shortfall, and the seller almost always keeps operational control of the target during the earn-out period.

How a VAM (Value Adjustment Mechanism) Works

A VAM operates in the opposite direction. Common in private equity minority investments into Vietnamese companies, a Value Adjustment Mechanism obliges the founders — or, less commonly, the company itself — to compensate the investor if agreed targets (revenue, net profit, an IPO timeline, or a specific valuation at a future financing round) are not met. Typical VAM triggers and remedies include:

• Ratchet mechanisms that increase the investor’s effective equity percentage if targets are missed, diluting the founders without new cash changing hands;
• Share transfer-back obligations, requiring founders to transfer additional shares to the investor at nominal or discounted value;
• Cash compensation or price-adjustment payments, calculated by formula and paid personally by the founders; and
• Put option triggers, allowing the investor to sell its stake back to the founders at a guaranteed internal rate of return.

This is precisely where earn-out and VAM in Vietnam diverge as legal instruments: an earn-out is a contractual condition on consideration owed by the buyer, while a VAM is frequently structured as a personal guarantee-like obligation of the founders, which raises a distinct set of validity questions under Vietnamese law.

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Why Dealmakers Use Earn-Out and VAM in Vietnam Transactions

Vietnam’s private M&A and venture markets have grown faster than reliable valuation benchmarks, particularly in technology, consumer, fintech, and mid-market manufacturing. Buyers and investors use earn-out and VAM in Vietnam clauses to manage three recurring problems:

• Information asymmetry — the founder knows the business better than the incoming investor, and a deferred, performance-linked price forces disclosure to matter economically;
• Forecast risk — Vietnamese businesses frequently present optimistic projections that a buyer is unwilling to pay for in cash at signing; and
• Retention — an earn-out in particular keeps founders and key management economically incentivized to stay and perform through an agreed transition period.

Key takeaway: Earn-outs are more common in strategic trade-sale acquisitions where the seller exits; VAMs are more common in growth-equity and venture rounds where the founder remains in control and the investor takes a minority stake.

Earn-Out vs VAM: Key Differences

The table below summarizes how earn-out and VAM in Vietnam mechanisms compare across the dimensions that matter most in drafting and negotiation.

Feature	Earn-Out	VAM (Value Adjustment Mechanism)
Trigger direction	Target outperforms base case	Target underperforms agreed KPI
Who pays / delivers	Buyer, out of deferred purchase price	Founders/sellers personally, or via share dilution
Typical settlement form	Additional cash consideration	Share transfer-back, ratchet dilution, or cash penalty
Common deal context	Strategic acquisitions, trade sales, full exits	PE/VC minority investments, growth-equity rounds
Enforceability risk under Vietnamese law	Moderate — generally enforceable as conditional consideration	Higher — scrutinized if it resembles a guaranteed minimum return or disguised interest
Tax treatment	Additional taxable transfer price/capital gain when paid	Case-by-case; may be treated as adjustment to transfer price or as separate taxable income to the recipient

Legal Enforceability of Earn-Out and VAM in Vietnam

The enforceability of earn-out and VAM in Vietnam clauses depends on how they interact with several distinct bodies of Vietnamese law. None of these statutes mentions “earn-out” or “VAM” by name — both are market-created structures that Vietnamese courts and arbitral tribunals must fit into existing categories of obligation.

Civil Code 2015 and Conditional Obligations

The Civil Code (Law No. 91/2015/QH13) permits civil transactions and contracts to be made subject to a condition (Article 120 and Article 402.6), so an earn-out payment conditioned on a future EBITDA target is, in principle, a lawful conditional obligation. The condition must be lawful, sufficiently certain to verify, and not designed to circumvent a mandatory rule — three tests that both earn-out and VAM in Vietnam clauses need to satisfy to survive judicial review.

Penalty Clauses and the Statutory Cap

A VAM cash-compensation clause that functions as a fixed penalty for underperformance risks being recharacterized as a penalty for breach of contract (phạt vi phạm). Under commercial contracts, Vietnamese law generally caps agreed penalties at 8% of the value of the breached obligation unless the breach falls into specific regulated exceptions.

A VAM drafted as an uncapped, fixed cash payment for missing a target is therefore vulnerable to being read down to that statutory ceiling, or challenged entirely, if a Vietnamese court or tribunal treats the underperformance as a “breach” rather than as the non-occurrence of a condition affecting price.

Enterprise Law 2020 and Charter Capital Constraints

Under the Enterprise Law (Law No. 59/2020/QH14), share transfer-back and ratchet mechanisms must respect rules on charter capital, share classes, and the equal treatment of shareholders. A VAM that effectively guarantees an investor a fixed minimum return — dressed up as a share adjustment — can be challenged as an unlawful capital guarantee disguised as an equity transaction, particularly where it operates independently of the company’s actual performance or profit distribution rules.

Securities Law 2019 Considerations

For deals involving public or soon-to-be-public companies, the Securities Law (Law No. 54/2019/QH14) adds a further layer: disclosure obligations, related-party transaction rules, and restrictions on preferential treatment among shareholders can all be implicated by a VAM’s ratchet or buy-back terms, especially where the target is preparing for an IPO that the VAM itself is designed to incentivize.

How Vietnamese Courts and Arbitral Tribunals Have Approached VAM Clauses

In practice, Vietnamese courts and arbitral panels have shown more skepticism toward VAM clauses than toward straightforward earn-outs. Where a VAM is structured as a guaranteed minimum return regardless of the company’s actual performance — effectively fixed interest on invested capital dressed as an equity adjustment — tribunals have questioned its validity as disguised lending or as a device that undermines charter capital and profit-distribution rules.

Specific published rulings on VAM enforceability remain limited in number and are not uniformly reported; parties should not assume a VAM will automatically be upheld on its literal terms. This is the central reason earn-out and VAM in Vietnam clauses require more careful drafting than their equivalents in more litigated markets such as Singapore or Hong Kong.

Drafting Techniques That Strengthen Earn-Out and VAM in Vietnam Clauses

Because Vietnamese statutory law does not expressly regulate either mechanism, enforceability is largely a function of drafting discipline. Practitioners structuring earn-out and VAM in Vietnam clauses typically use the following techniques to reduce risk:

• Prefer share-based settlement over fixed cash penalties. A ratchet that adjusts equity percentages based on a genuine, formula-driven valuation is harder to recharacterize as a penalty or disguised interest than a flat cash payment.
• Tie triggers to audited, objectively verifiable metrics — audited revenue, EBITDA, or net profit under a named accounting standard — rather than subjective or management-controlled measures.
• Avoid guaranteed minimum return language. Framing the adjustment as a valuation correction, not as a guaranteed IRR or fixed annual return, keeps the clause closer to a legitimate price mechanism.
• Cap or structure cash components conservatively against the statutory penalty ceiling, or characterize any cash payment expressly as a price adjustment rather than a penalty for breach.
• Build in an independent expert determination mechanism for disputed financial metrics, reducing reliance on litigation to resolve factual valuation disagreements.
• Use a VIAC arbitration clause for cross-border and PE-backed deals, giving the parties a specialized, commercially experienced forum rather than a generalist provincial court.

Key takeaway: A well-drafted VAM should read as a valuation-true-up mechanism, not as a disguised guarantee — the closer it stays to that framing, the more defensible it is if challenged.

Tax Implications of Earn-Out and VAM Payments in Vietnam

Tax treatment is often underestimated when structuring earn-out and VAM in Vietnam clauses, yet it materially affects the economics for both sides.

Earn-out payments made to a departing seller are generally treated as additional transfer price or capital gain, taxable when actually paid or accrued, which can create timing mismatches between when tax authorities expect reporting and when the contingent amount is finally quantified. For a foreign corporate seller, this additional consideration typically falls within capital assignment/transfer tax rules and may trigger further withholding obligations for the buyer as the paying party.

VAM payments raise a separate question: whether a cash compensation or share transfer-back should be treated as (i) an adjustment to the original transfer price of the shares, (ii) separate taxable income to the recipient investor, or (iii) in narrower cases, a transaction with no independent tax base because it merely restores the parties to the originally agreed economic position.

Vietnamese tax authorities have not published comprehensive guidance specific to VAM structures, so parties should document the commercial rationale for the adjustment carefully and, for material transactions, seek a formal ruling or at minimum a reasoned tax memorandum before the VAM is triggered. Parties should confirm current tax treatment with a licensed tax advisor at the time of a specific triggering event, as practice continues to evolve.

Dispute Resolution for Earn-Out and VAM in Vietnam Transactions

Because earn-out and VAM disputes usually turn on financial metrics — audited EBITDA, revenue recognition timing, or the calculation of a ratchet formula — the dispute resolution clause matters as much as the substantive drafting. Considerations specific to earn-out and VAM in Vietnam transactions include:

• Arbitration over litigation. The Vietnam International Arbitration Centre (VIAC) is generally preferred for cross-border PE and M&A disputes over provincial People’s Courts, given greater familiarity with international deal structures and confidentiality of proceedings.
• Expert determination carve-outs. Many well-drafted agreements route purely accounting or valuation disagreements to an independent auditor or expert, reserving arbitration for legal validity disputes.
• Governing law choice. Where the SPA is governed by foreign law (for example, Singapore or English law) but the target and founders are in Vietnam, enforcement of any resulting award against Vietnamese assets or individuals still runs through Vietnamese recognition and enforcement procedures, so the underlying VAM structure must remain defensible under Vietnamese public policy even if the contract itself is governed offshore.
• Interim relief. Asset-freezing or injunctive relief to secure a share transfer-back pending dispute resolution can be difficult to obtain quickly in Vietnam, which argues for security mechanisms (escrow, pledged shares) agreed at signing rather than relying solely on post-dispute remedies.

Frequently Asked Questions

Is a VAM legal under Vietnamese law?

A VAM is not prohibited outright, but its enforceability depends heavily on drafting. A VAM framed as a genuine valuation adjustment is more defensible than one framed as a guaranteed minimum return.

Can an earn-out and VAM be used in the same Vietnam deal?

Yes. Some transactions combine a seller-side earn-out with an investor-side VAM, particularly where a founder both sells a partial stake and remains a shareholder subject to future performance targets.

What happens if VAM targets are missed but the founder cannot pay?

Most VAM clauses anticipate this by allowing share transfer-back or dilution instead of cash payment, since founders in Vietnam often lack liquid personal assets to satisfy a cash compensation obligation.

Are VAM clauses enforceable in Vietnamese courts or only in arbitration?

Both venues can hear VAM disputes, but arbitration through VIAC is more commonly chosen for cross-border, PE-backed transactions due to greater commercial familiarity with these structures.

How long do earn-out and VAM periods typically run in Vietnam deals?

Most earn-out periods run one to three years post-closing; VAM periods are often linked to a future financing round or IPO timeline rather than a fixed calendar period.

Earn-out and VAM in Vietnam mechanisms will keep growing in importance as private equity, venture capital, and strategic M&A activity in Vietnam matures and valuation gaps between buyers and sellers remain common. The practical next step for any party negotiating one of these clauses is to have Vietnamese counsel stress-test the trigger definitions, settlement mechanics, and dispute resolution forum against current Civil Code, Enterprise Law, and Securities Law requirements before signing — not after a dispute arises. Explore IVLF’s cross-border dispute resolution and arbitration services.

This article provides general legal information for educational purposes and does not constitute legal advice for any specific transaction. Parties should seek tailored advice from qualified Vietnamese counsel before entering into an earn-out or VAM arrangement.