How to Draft and Enforce Earn‑outs in Swiss Private Equity Deals (2026)

Earn-outs private equity switzerland transactions increasingly depend on well-constructed deferred consideration mechanics to bridge the gap between an optimistic seller and a cautious buyer. As Switzerland’s investment-screening legislation and recent corporate-law reforms reshape remedy channels and bargaining leverage, the drafting and enforcement of these contingent payment structures has become a sharper discipline. This practitioner guide sets out, step by step, how to design, document, tax and litigate an earn-out in a Swiss private equity deal, with required-document tables, cost ranges, enforcement timelines and a drafting checklist. It is written for corporate counsel, sponsors, founders and M&A advisers who need actionable detail rather than high-level commentary.

Updated 2026. The sample clause language in this guide is illustrative only and is not legal advice; seek Swiss legal review before use.

Overview: purpose and when to use earn-outs private equity switzerland deals

An earn-out is a contractual mechanism under which part of the purchase price for a target company becomes payable only if the business achieves defined performance thresholds after closing. The structure is governed principally by Swiss contract law under the Code of Obligations (Obligationenrecht / Code des obligations), which gives parties broad freedom to agree bespoke payment conditions provided they are sufficiently determinable. In a private equity context, earn-outs allow a sponsor to defer and de-risk a portion of consideration while giving the seller the opportunity to capture upside the buyer is not yet willing to pay for in cash.

The regulatory environment matters here. Switzerland has adopted a federal investment-screening regime (the Investment Screening Act / Investitionsprüfgesetz), which, once in force, is expected to condition certain acquisitions of domestic companies by foreign state-related investors on regulatory clearance. Where such screening applies, it affects both timing and the commercial leverage of each side. Where closing itself is conditional, parties must consider how any required approvals interact with earn-out measurement periods and payment triggers. The practical effect, industry observers expect, is that more Swiss deals will fold regulatory milestones into the deferred-payment architecture rather than treating them as pure conditions precedent.

When an earn-out is appropriate

Earn-outs suit situations where valuation is genuinely contested because future performance is uncertain. Classic triggers include founder-led businesses whose value depends on the founder remaining engaged, high-growth companies with unproven revenue trajectories, and life-sciences targets whose value turns on a pending regulatory approval or clinical milestone. They are also useful where the buyer wants to retain and incentivise key management through the measurement period. Conversely, earn-outs are poorly suited to deals where the buyer intends an immediate operational overhaul, because post-closing integration can distort the very metrics the earn-out measures.

Alternatives to earn-outs

An earn-out is one of several tools for allocating valuation risk, and it is often the most litigated. Alternatives worth weighing include a straightforward escrow or holdback, where a portion of the price is retained to secure warranty or indemnity claims; a closing-accounts price adjustment, which trues up consideration against a reference balance sheet shortly after completion; and a vendor loan note, which defers payment without tying it to performance. For a purely accounting-driven reconciliation, post-closing adjustments in Switzerland are usually simpler to administer than a multi-year earn-out and generate fewer disputes.

The Swiss market remains active, with mid-market buyouts and growth capital resilient despite tighter regulatory scrutiny. The combination of screening obligations and carefully negotiated contractual remedies has, if anything, increased demand for well-drafted contingent consideration, because parties want certainty about how and when deferred amounts become payable.

Eligibility and deal types that use earn-outs

There is no statutory eligibility threshold for an earn-out, any Swiss share or asset purchase agreement can incorporate one. In practice, earn-outs cluster around private company acquisitions, venture and growth-stage targets, and founder-led businesses where the seller stays on to run the company. Cross-border deals add complexity: currency conversion, withholding obligations and the enforceability of the chosen dispute forum all need express treatment. Where the buyer is foreign or the target operates in a sensitive sector, the investment-screening regime may condition the transaction and, by extension, the earn-out timetable.

Sectors that raise special considerations

Technology targets frequently base earn-outs on recurring revenue or user metrics, which demand precise definitions to avoid manipulation. Life-sciences deals often tie payment to regulatory approvals or development milestones, making the earn-out binary and the drafting of the trigger decisive. Businesses in sectors the screening regime treats as sensitive, such as certain critical infrastructure, energy or defence-adjacent activities, may fall within investment-screening scope, so the earn-out must account for the possibility that clearance conditions delay or alter the payment structure. In each case, the KPI must be drafted against the sector’s accounting and regulatory realities rather than a generic template.

Step-by-step: how to draft and implement an earn-out

The following procedure maps the lifecycle of an earn-out from term sheet to payment or dispute. Each step identifies the typical actor, the output and the realistic duration.

Step 1, Term-sheet mechanics

Fix the headline parameters before the lawyers draft a word of the schedule: the maximum earn-out amount (cap), any minimum (floor), the measurement period, the payment schedule and the primary KPIs, revenue, EBITDA, product milestones or regulatory approvals. Resolving these at term-sheet stage avoids re-trading later. A short illustrative term-sheet clause might read: “The Sellers shall be entitled to an earn-out of up to CHF [●], payable if the Company achieves EBITDA of at least CHF [●] in the financial year ending [date], calculated in accordance with Schedule [●].” (Illustrative only, seek legal advice.)

Step 2, KPI drafting and measurement mechanics

This is where most earn-out disputes are born or avoided. Define each metric with precision: the exact measure, the measurement date, the accounting basis (Swiss GAAP FER or IFRS), permitted exclusions, pro-rata adjustments and the treatment of extraordinary items. Specify how intra-group charges, management fees and one-off costs are handled, because a buyer that can load costs onto the target will compress an EBITDA-based earn-out. An illustrative KPI clause: “EBITDA shall be calculated on a basis consistent with the Accounting Principles set out in Part B, excluding (a) transaction costs, (b) management charges levied by the Buyer’s group, and (c) non-recurring items agreed in writing.” (Illustrative only.)

Step 3, Accounting and tax treatment alignment

Involve a Swiss tax adviser early. The characterisation of the earn-out, as part of the capital purchase price or as remuneration for continued services, drives its tax treatment and must be addressed before the clause is finalised. Where the seller remains an employee, the tax authorities may treat payments contingent on continued employment as taxable income rather than a tax-free private capital gain, with corresponding social-security and withholding consequences. Aligning the accounting recognition of the deferred liability with the tax position avoids nasty surprises when payment falls due.

Step 4, Security and collection

Sellers face credit risk on a deferred payment; buyers face overpayment risk. Common security devices include escrow accounts, bank guarantees and contractual set-off rights. Escrow is the most frequent choice: the agreement should specify the escrow amount, the release triggers, any repayment caps and, critically, the treatment of the escrowed funds on the insolvency of either party. The trade-off is cost and tied-up capital against certainty of collection. An escrow release trigger should be objective and tied to the certified earn-out calculation, not to a party’s unilateral confirmation.

Step 5, Governance and reporting

During the measurement period the seller is exposed to the buyer’s conduct of the business. The SPA should impose positive and negative covenants: an obligation to run the target in the ordinary course, to maintain accounting consistency, to grant the seller information and audit rights, and to refrain from actions that would artificially depress the KPI. Build in a periodic reporting template and a clear escalation path to independent expert determination if the parties dispute the figures.

Step 6, Dispute escalation ladder

Draft a tiered mechanism: a good-faith meet-and-confer period, then independent expert determination for technical accounting questions, then arbitration or court for genuine legal disputes. The clause should name the appointing body for the expert, the seat of any arbitration (Switzerland is a strong choice for international enforceability), the governing law and the language of proceedings. A clean escalation ladder prevents a technical dispute about a number from escalating prematurely into full-blown litigation.

Step 7, Closing mechanics and funds flow

At closing, establish the escrow and payment accounts, document the timed-release conditions, and set out any true-up mechanics, tax-withholding obligations and currency-conversion provisions. For cross-border deals, state the conversion date and rate source to avoid later argument. Where regulatory clearance is a condition, make the funds-flow contingent on that clearance and address what happens to the earn-out timetable if clearance is delayed.

Practitioner tip: “The single most valuable paragraph in any earn-out schedule is the worked calculation example. Two pages of definitions can still produce two different numbers; a worked example forces the parties to agree the arithmetic before the dispute arises.”

Choosing the enforcement forum

Where a dispute does crystallise, the forum materially affects speed, cost and confidentiality. The table below compares the three principal options for earn-outs private equity switzerland disputes.

Required documents

A workable earn-out requires a document set broader than the SPA itself. Prepare the following before and immediately after closing.

Timeline and deadlines

Earn-out timelines vary sharply by deal type. A short, revenue-based earn-out on a technology target might run a single 12-month measurement period, with a payment certification window of 2–8 weeks after year-end and payment within a further 10–30 business days. A growth-equity deal with a staged EBITDA earn-out may run 24–36 months, with annual interim measurements and corresponding reporting obligations throughout.

Three categories of deadline deserve explicit calendaring. First, reporting deadlines, the dates by which the buyer must deliver the earn-out statement to the seller. Second, objection deadlines, a fixed period (commonly 20–30 business days) within which the seller must dispute the statement, failing which it becomes binding. Third, limitation periods, under the Code of Obligations, ordinary contractual claims are subject to statutory prescription, so the SPA should confirm how notice and objection deadlines interact with the general limitation regime. Build a calendar checklist into the SPA schedule so neither party forfeits rights through inattention.

Where investment-screening clearance conditions apply, add the clearance timetable to the calendar. If clearance is delayed, the measurement period should be expressly tolled or re-based so that the seller is neither advantaged nor prejudiced by a regulatory process outside its control.

Costs and fees

Costs scale with deal size and complexity. The figures below are indicative ranges, not quotations, and reflect typical Swiss market practice. Legal fees in Switzerland are generally agreed freely between lawyer and client, commonly on an hourly basis, subject to the professional conduct rules under the Federal Act on the Free Movement of Lawyers (Anwaltsgesetz / BGFA).

For a mid-market earn-out, parties can expect combined drafting, tax and accounting costs broadly in the region of CHF 25,000–100,000 at the documentation stage, with dispute costs sitting on top only if the earn-out is contested. The economic case for investing in precise drafting is straightforward: every franc spent clarifying the KPI methodology reduces the probability of a six-figure dispute later.

What changes affect earn-outs private equity switzerland structures

Two developments reshape the earn-out landscape. The first is Switzerland’s broader corporate-law modernisation, including the revised company-law provisions of the Code of Obligations that have entered into force in recent years, affecting share capital, distributions and shareholder arrangements. For earn-out drafters, the practical consequence is that remedy clauses, notice mechanics and limitation interactions deserve a fresh look rather than a roll-forward of older precedent. The SPA should state expressly which remedies the parties intend to preserve or exclude, so that the contractual bargain is not displaced by a default statutory position.

The second is the investment-screening regime. Where a transaction falls within scope, clearance becomes a condition that can delay closing and, by extension, the start of the earn-out measurement period. The regime changes bargaining leverage: a buyer that needs clearance may accept a more seller-friendly earn-out to compensate for execution risk, while a seller exposed to clearance delay will want the measurement period tolled and the payment timetable protected. For a fuller treatment of the regime, see Switzerland investment screening, implications for PE deals, available at globallawexperts.com.

Recommended drafting adjustments include an express regulatory-approval milestone within the earn-out schedule, a material-adverse-change provision tailored to screening outcomes, and a clear tolling clause that re-bases the measurement period if clearance is delayed. These provisions allocate regulatory risk deliberately rather than leaving it to default interpretation.

Enforcement and dispute resolution: practical playbook

When an earn-out is contested, discipline in the early stages determines the outcome. The lifecycle runs from identification of the dispute, through internal escalation, to formal determination and finally enforcement of the result.

Identification and internal escalation. The dispute usually surfaces when the buyer delivers an earn-out statement the seller rejects. The SPA should require a good-faith meet-and-confer period before any formal step, with senior representatives mandated to resolve the matter. This stage resolves a meaningful proportion of disputes without external cost.

Expert determination. For disputes that are essentially about numbers, whether a cost was correctly excluded, whether revenue was properly recognised, an independent expert is faster and cheaper than arbitration. The clause should specify the appointing body, the expert’s mandate, the cost allocation and the extent to which the expert’s decision is final. Swiss practice treats a properly framed expert determination as binding with only limited court review, which is precisely why it suits technical KPI disputes.

Arbitration and courts. Where the dispute raises genuine legal questions, contract interpretation, alleged breach of the ordinary-course covenant, fraud, arbitration or litigation is the right forum. Arbitration seated in Switzerland offers confidentiality and strong cross-border enforceability, because awards are recognised internationally under the New York Convention; the Swiss Arbitration Centre publishes institutional rules (the Swiss Rules of International Arbitration) suited to M&A disputes. Swiss civil courts offer robust domestic enforcement and are the right venue where a public record or injunctive relief is required, though proceedings are slower and public.

A recommended escalation clause reads: “Any dispute concerning the Earn-Out Statement shall first be referred to senior representatives for 20 business days; failing resolution, an accounting dispute shall be referred to an independent expert whose determination shall be final; any other dispute shall be resolved by arbitration seated in [Swiss city] under the Swiss Rules.” (Illustrative only, seek legal advice.)

Practitioner tip: “Decide at the drafting stage which questions go to an expert and which go to arbitration. The worst outcome is a clause so vague that the parties first have to litigate about where to litigate.”

Common pitfalls and drafting checklist

Recurring failures in earn-out drafting are predictable and avoidable. The most damaging are set out below with the corresponding remedy.

• Imprecise KPIs. A metric defined in a sentence invites manipulation. Remedy: define the measure, the accounting basis, the exclusions and a worked example.
• Inconsistency with the accounting basis. Measuring EBITDA without fixing the accounting standard produces two defensible numbers. Remedy: specify Swiss GAAP FER or IFRS and require consistency with historical practice.
• No security. A seller who takes an unsecured deferred payment bears full credit risk. Remedy: use escrow, a bank guarantee or set-off rights with insolvency-proof release triggers.
• Weak escalation mechanics. A single undifferentiated dispute clause forces every disagreement into expensive arbitration. Remedy: a tiered ladder separating accounting from legal disputes.
• No audit rights. Without information and audit rights, the seller cannot verify the buyer’s statement. Remedy: express reporting obligations and a right to inspect the underlying records.
• Buyer conduct uncontrolled. A buyer free to reorganise the target can suppress the KPI. Remedy: an ordinary-course covenant and a prohibition on actions designed to defeat the earn-out.

Treat these as a pre-signing checklist. A red flag in any one of them is reason to revisit the schedule before the SPA is executed rather than after a dispute emerges.

Conclusion

Earn-outs private equity switzerland transactions reward precision and punish ambiguity. The difference between a clean payment and a multi-year dispute almost always lies in the quality of the KPI definitions, the accounting basis, the security package and the dispute-escalation ladder agreed at the drafting stage. With Switzerland’s investment-screening regime and modernised corporate-law framework now shaping remedies and timing, drafters should revisit their precedent and build regulatory milestones, tolling provisions and tailored remedy clauses into the earn-out schedule. Handled with this discipline, an earn-out remains one of the most effective tools for bridging a valuation gap in a Swiss deal, and one of the most defensible if it is ever tested.

Sources

1. Swiss federal legislation portal, Fedlex
2. Swiss Federal Tax Administration (ESTV)
3. Swiss Federal Supreme Court (Bundesgericht / Tribunal fédéral)
4. Swiss Arbitration Centre
5. Swiss Federal Administration (admin.ch)
6. Swiss Bar Association (SAV/FSA)