Earn-Out in SME M&A Transactions

1. What is an earn-out?

An earn-out (or additional price) is a contractual mechanism by which part of the sale price of a company is deferred and conditional upon the achievement, over a defined post-closing period, of previously set performance objectives (revenue, EBITDA, margin, customer acquisition, contract renewals, etc.).

Typical price structure with earn-out:

• Fixed price ("upfront"): paid at closing, generally 60% to 80% of the total valuation
• Earn-out: paid later, under certain conditions, generally over 1 to 3 years

An earn-out is neither a seller loan nor a liability guarantee: it is a variable price indexed to future performance, which transfers part of the business risk from the buyer to the seller.

Earn-outs are also a frequent source of disputes. This guide explains how they work, how to choose the indicator, the triggering mechanism, and the clauses that secure the system.

The balance between fixed and variable components reflects the sharing of risk. A high variable component protects the buyer but worries the seller; a low variable component reassures the seller but limits the benefit of the mechanism.

In practice, the earn-out often represents 15 to 35% of the price. Beyond that, the seller feels they are "selling on credit" their own performance, and the risk of tension increases, especially if they remain in charge during the period.

2. Why use an earn-out? The economic rationale

From the buyer's point of view

• Bridging a valuation gap between the seller's (often optimistic) expectations and their own risk analysis
• Securing the transition by maintaining the seller's operational involvement during the critical post-acquisition period
• Limiting the risk associated with uncertainty about the sustainability of the client portfolio, dependence on management, or the reliability of the business plan
• Finance the acquisition by spreading part of the price over time (favorable cash flow effect)

From the seller's point of view

• To capture the future value that he believes is not reflected in the fixed price
• To unblock a transaction which, without this mechanism, would not reach an agreement on the price
• Benefit from a positive narrative: accepting an earn-out can be perceived as a signal of confidence in the strength of the company being sold.
• Potential tax optimization depending on the structure

3. Situations in which earn-out is relevant

4. Key conditions to negotiate

4.1 Choosing the indicator (KPI)

A simple, auditable indicator should be prioritized, one that is as unmanipulated as possible by the buyer (often revenue or EBITDA with accounting rules contractually "fixed" from closing).

In any case, the seller must bear in mind that once the transaction is completed, the buyer controls the company and can easily ensure that targets are not met in order to avoid paying the earnings. outs. The human relationship, trust and the study of the buyer's behavior on previous transactions are as important to study as the legal clauses.

4.2 The duration of the earn-out period

• Standard SME market: 12 to 36 months
• A duration that is too short (< 1 year) does not allow for the absorption of seasonality or long sales cycles.
• A duration that is too long (> 3 years) dilutes the seller's motivation and increases the risk of strategic misalignment with the buyer.

4.3 Calculation method and payment schedule

Three common architectures:

1. Binary threshold ("all or nothing"): earn-out paid in full if the objective is met, nothing otherwise → simple but can create opportunistic behavior at the end of the period
2. Linear/pro-rata formula: payment proportional to the achievement of the objective between a floor and a ceiling → recommended, better aligns interests
3. Progressive tiers ("tranches"): several thresholds with increasing payment multiples → useful for rewarding significant outperformance

Example of a linear formula:

4.4 Floor and ceiling

• The floor protects the buyer: below a certain performance level, no earn-out is due.
• The slope determines the sensitivity of the supplement to overperformance
• The cap protects the buyer from a disproportionate earn-out in the event of exceptional outperformance (but can demotivate the seller once the cap is reached — to be handled with care)

4.5 Governance during the earn-out period

An often underestimated but critical point:

• What level of operational autonomy does the salesperson retain (if they remain in charge)?
• What are the buyer's commitments regarding resources: maintenance of the marketing budget, key staff, no reallocation of resources to other entities within the group?
• Non-interference clause: the acquirer must not be able to manage the business in such a way as to artificially reduce earn-out indicators
• Contractual definition of the accounting principles applicable during the period (methods, no change in depreciation practices, allocation of group expenses, intra-group transfer pricing)

4.6 Seller protection clauses

• Good faith/best efforts clause: the buyer is obligated to manage the business in the interest of achieving its objectives.
• Prohibition of sale or merger of the business during the earn-out period without the seller's agreement or an acceleration clause
• Acceleration clause: In the event of the sale of the business, a change of control, or the dismissal without cause of the selling executive during the period, the earn-out becomes immediately payable at the maximum amount or a reasonable estimate.
• Reporting and auditing: the seller has the right to access the accounts and to have the figures used as the basis for the calculation audited (by an independent expert in case of disagreement).

4.7 Dispute Resolution Mechanism

• Appointment in advance of an independent expert (often a third-party auditing firm) to make a ruling in case of disagreement over the calculation
• Arbitration or mediation clause prior to any legal action
• Specific contractual deadlines for notification, dispute and response

5. Advantages and disadvantages — comparative summary

6. Common pitfalls observed in practice

1. Poorly defined KPI: lack of a precise definition of "EBITDA" (before or after holding company expenses, exceptional adjustments, etc.) → number 1 source of disputes
2. Lack of a governance clause: the acquiring company redirects business priorities, reduces budgets, or reallocates key resources to other entities, which inevitably drags down the indicators.
3. Earn-out too complex: multi-criteria formulas difficult to audit and a source of misunderstanding
4. Lack of an acceleration clause: if the buyer quickly resells the target property, the original seller loses all chance of receiving the additional payment.
5. Underestimating the risk of the seller leaving: if the selling manager leaves before the end of the period (breakdown of the relationship, disagreement over governance), the mechanism may collapse.
6. In the absence of a pre-appointed third-party expert, in the event of a dispute, without a provisional mechanism, the only remaining option is lengthy and costly legal proceedings.

7. Tax and accounting aspects (points to consider, to be validated with a tax specialist)

• Tax treatment of earn-out payments: in France in particular, the tax regime for earn-outs depends on their nature (earn-out payment for the sale of securities vs. remuneration for continued employment), with significant consequences for the applicable tax regime (capital gain vs. income) — the contractual classification is decisive.
• Provisioning at the acquirer's level: the fair value of the earn-out must be provisioned on the balance sheet upon acquisition (IFRS 3 standard in consolidation), with periodic revaluation impacting the income statement.
• Risk of reclassification: a tax authority may reclassify an earn-out as a salary supplement if it is too closely tied to the manager's continued employment rather than to the company's performance.

8. Tips

1. An earn-out is not a tool to bridge a fundamental valuation disagreement. If it is used to mask a price difference of more than 20-25%, it is often a sign that the transaction itself is flawed, or that the underlying multiple needs to be revised.
2. Simplicity > sophistication. The most contentious earn-outs are those with complex, multi-indicator, multi-tiered formulas. A single, clear indicator with a simple linear formula drastically reduces the risk of litigation.
3. Negotiate the governance structure as much as the formula. A savvy seller will spend as much time negotiating on the operational protection clauses (budget, staffing, autonomy) as on the percentage or multiple applied.
4. Anticipate the buyer's exit scenario. Always include an acceleration clause: this is the best protection against the risk of a "stillborn earn-out" in the event of a quick resale.
5. Have the accounting feasibility of the chosen KPI audited from the outset of the structuring process. Good M&A advice is to have the accounting definitions reviewed by a chartered accountant or auditor before signing, not after.
6. The earn-out is also a managerial retention tool. When well structured, it aligns the interests of the seller-manager with those of the buyer during the riskiest phase: integration.
7. Market statistics: in SME/ETI transactions, we generally observe an earn-out representing between 10% and 30% of the total price, rarely beyond 40%, a difference that is too high making the operation psychologically difficult for the seller to accept (uncertainty deemed excessive).

9. Checklist for structuring an earn-out

• Does the valuation gap really justify an earn-out (vs. renegotiating the fixed price)?
• Is the chosen KPI simple, objective, and difficult to manipulate?
• Are the applicable accounting rules contractually fixed?
• Is the duration appropriate to the economic cycle of the activity?
• Is the calculation formula (threshold, linear, plateau) clearly defined with numerical examples in the appendix?
• a floor and a cap planned?
• Do the governance clauses during the period protect the seller against adverse management?
• Is there an acceleration clause in place in the event of a change of control or dismissal without cause?
• Is the dispute resolution mechanism (independent expert, arbitration) defined in advance?
• Was the tax treatment validated beforehand with a tax advisor?
• the periodic reporting (frequency, format, seller's right to audit) contractually agreed upon?

10. Conclusion

An earn-out is a powerful tool for bridging the gap between buyer and seller positions in an M&A transaction involving SMEs, but it shifts the point of contention: from price negotiations to negotiations on definitions, governance, and execution. Its success depends less on the principle itself than on the quality of the contract drafting and the anticipation of potential disagreements.

A poorly structured earn-out is often worse than no earn-out at all: it creates a prolonged and conflictual contractual relationship between two parties who, normally, should have turned the page on negotiation at closing.

Frequently asked questions about earn-outs

What is an earn-out (additional price)?

An earn-out is a contractual mechanism by which part of the sale price of a company is deferred and conditional upon the achievement, over a defined post-closing period, of previously set performance objectives (revenue, EBITDA, margin, etc.). It is neither a seller loan nor a liability guarantee: it is a variable price indexed to future performance.

What share of the price does an earn-out usually represent?

In practice, the earn-out often represents 15 to 35% of the price. Beyond that, the seller feels they are "selling on credit" their own performance, and the risk of tension increases, especially if they remain in charge during the period.

Which indicator (KPI) should be chosen for an earn-out?

A simple, auditable indicator should be prioritized, one that is as unmanipulated as possible by the buyer — often revenue or EBITDA, with accounting rules contractually "fixed" from closing.

How long does the earn-out period last?

The standard SME market range is 12 to 36 months. A duration that is too short (less than one year) does not allow for the absorption of seasonality or long sales cycles; a duration that is too long (more than 3 years) dilutes the seller's motivation and increases the risk of strategic misalignment with the buyer.

How can the seller be protected in an earn-out?

Through dedicated clauses: a good faith / best efforts clause, governance clauses framing how the business is managed during the period, an acceleration clause in the event of a change of control or dismissal without cause, and the right to reporting and auditing of the figures used as the basis for the calculation.

What is the leading source of earn-out disputes?

A poorly defined KPI: the lack of a precise definition of "EBITDA" (before or after holding company expenses, exceptional adjustments, etc.). More broadly, 80% of post-acquisition disputes related to earn-outs stem from imprecise drafting of the clauses.