- · Earn-outs appear in roughly 22% of M&A transactions and are especially common in Swiss SME deals, yet sellers routinely treat maximum payouts as equivalent to cash at closing.
- · Proper valuation requires probability-weighted scenario modelling and a discount rate that reflects time value, performance risk, buyer control, and collection uncertainty.
- · Swiss tax authorities have documented practice of reclassifying earn-out receipts from tax-exempt capital gains into taxable dependent income when employment or non-compete provisions are present.
- · Advisors should model earn-out present value explicitly across multiple scenarios and consider requesting a binding cantonal tax ruling before the letter of intent is signed.
Earn-outs are, at first glance, a reasonable solution to an uncomfortable situation. Buyer and seller cannot agree on value. The buyer believes the projected growth is speculative; the seller knows what the business is capable of. Rather than force a concession from either side, the parties defer a portion of the purchase price to post-closing performance. Everyone shakes hands and calls it alignment.
The problem is what happens next, specifically in the mind of the seller.
A deal structured as CHF 5 million at close, CHF 2 million in escrow, and CHF 3 million contingent on Year 2 EBITDA reaching a defined threshold is frequently described, and mentally accounted for, as a CHF 10 million transaction. For liquidity planning, lifestyle decisions, and tax expectations, the seller treats the earn-out ceiling as if it were a wire transfer already in transit. It is not.
This cognitive shortcut carries real financial consequences and, under Swiss law, a tax dimension that can render the earn-out materially less valuable than anticipated at any payout level.
As Auxo Capital Advisors explains in their overview of earnout structures, an earn-out pays the seller only when the acquired business achieves predefined performance targets after the deal closes. Revenue, EBITDA, gross profit, and operational milestones are common metrics. The same source makes a point that deserves careful attention: once the buyer takes ownership, the seller typically loses control over pricing decisions, expense management, integration choices, investment levels, and the accounting policies used to measure the very metric on which the earn-out depends.
That is not a minor caveat. It means the earn-out's outcome is materially influenced by someone whose incentives may not be fully aligned with the seller's payout. The seller has transferred both the business and the steering wheel.
Correct analysis begins by abandoning the single-outcome assumption. A properly constructed earn-out valuation requires four sequential steps.
Rather than modelling one trajectory, a rigorous analysis requires at minimum a base case, an upside, and a downside. A two-year EBITDA earn-out, for instance, must account for integration disruption in the first year, the possibility of margin compression from consolidation costs, the potential for cross-selling synergies to arrive later than expected, and the realistic probability that market conditions shift materially between signing and the measurement date.
Each scenario receives a probability weight reflecting integration risk, management execution, and market conditions. Without this step, the valuation is not analysis; it is optimism with a spreadsheet attached.
This is where formula structure becomes decisive. An all-or-nothing earn-out pays zero if the target is missed by even a marginal amount. A pro rata formula pays proportionally. A tiered or cumulative structure may allow later outperformance to compensate for an earlier shortfall. The same underlying business performance produces dramatically different seller outcomes depending on which structure was negotiated. A seller who did not model these scenarios numerically before signing has, effectively, not read the contract.
Mercer Capital's analysis of fair value measurement for contingent consideration notes that analytical approaches must account for payout structure, underlying metrics, and risk characteristics, with careful documentation of key assumptions. For practical purposes, the discount rate applied to earn-out cash flows reflects several compounding layers of risk.
A reasonable build-up for a Swiss SME earn-out might begin with the Swiss 10-year government yield (currently approximately 0.9%), add an equity risk premium for SMEs (typically 5 to 8%), a company-specific premium reflecting key-person dependency or customer concentration (2 to 5%), a performance risk premium for the probability of actually hitting the target (3 to 8%), buyer credit and collection risk (0 to 3%), and measurement or dispute risk arising from accounting ambiguity (1 to 3%).
Applied concretely: a two-year earn-out with a maximum payout of CHF 3 million, a 60% probability of full payment, and an 18% annual discount rate produces a present value of approximately CHF 1.5 million. The gap between CHF 3 million and CHF 1.5 million is not a rounding error. It is a material difference that affects liquidity planning, investment decisions, and tax obligations.
As Niederer Kraft Frey observes in their Swiss M&A Pricing Practice Guide, earn-outs are more typically found in small to medium-sized deals, which means this valuation gap disproportionately affects precisely the sellers for whom the consideration matters most.
Earn-outs introduce a structural subtlety that is underappreciated even by experienced sellers: the outcome depends not only on the final result but on how and when that result is achieved.
Consider a two-year earn-out with separate annual EBITDA targets of CHF 1 million per year. If Year 1 EBITDA comes in at CHF 900,000 and Year 2 delivers CHF 1.2 million, cumulative two-year EBITDA is CHF 2.1 million — exceeding the aggregate target by CHF 100,000. Under an all-or-nothing annual formula, the seller may receive nothing, because each year is evaluated independently and Year 1 fell short. Under a cumulative formula, the seller earns out in full.
The formula is not a technicality. It is the mechanism by which economic value is either transferred or retained. Sellers should negotiate formula structure explicitly and, critically, stress-test it with numerical examples before execution: Does unearned performance carry forward? Can later periods cure earlier shortfalls? If the buyer sells the company or integrates it before the earn-out period concludes, does the remaining contingent consideration accelerate?
Swiss private capital gains from the sale of a qualifying business are generally exempt from tax under Article 16(3) of the Federal Direct Tax Act. This exemption is a meaningful feature of Swiss M&A transactions and shapes deal economics across the market. What many sellers do not adequately appreciate is how readily the Swiss tax authority can recharacterize earn-out receipts to fall outside that exemption.
As Valfor's Tax Page on earn-out treatment and capital gains exemption limits explains, authorities may reclassify an earn-out as taxable income when they conclude it compensates something other than the transfer of shares — for example, when the business's value is closely tied to the seller's personal involvement and the agreement includes continued employment or a non-compete clause.
The conditions that attract scrutiny follow a discernible pattern. If post-closing executive compensation decreases significantly relative to pre-sale levels, the earn-out can appear to substitute for salary. If the purchase price diverges materially from an independent valuation, it raises questions about whether stated consideration conceals employment-related payments. If multiple sellers receive meaningfully different earn-out terms that correlate with their willingness to remain employed, the structure invites comparison. And if the purchase agreement explicitly conditions earn-out payment on continued employment or non-compete compliance, the contractual language alone may be sufficient to trigger reclassification.
Baer Karrer's analysis of Swiss M&A tax considerations confirms that earn-out arrangements where sellers continue working for the target, or where non-compete agreements are present, may partly qualify as taxable income and lead to social security contribution consequences at the company level as well.
When a reclassification occurs, the consequences are not partial. The full earn-out amount becomes subject to ordinary income tax and social security contributions at both cantonal and federal levels. In a high-income canton, this exposure can eliminate 40 to 50% of the earn-out's face value in taxes that were not anticipated in any pre-closing financial model.
Structural protection is available but must be built into the agreement before signing. The purchase price should reflect independently supported market value. Post-sale compensation should remain consistent with historical norms. No contractual link should exist between earn-out receipt and employment duration or non-compete compliance. Where non-compete provisions are commercially necessary, a separate penalty mechanism — rather than earn-out conditioning — is structurally cleaner from a tax perspective.
The sell-side advisor's obligation in a transaction involving earn-outs is not limited to negotiating the headline figure. It encompasses two analytically distinct layers.
The first is financial modelling. A three-scenario model with explicit probability weighting, a layered discount rate reflecting all identifiable risk categories, and sensitivity analysis across formula structures is the minimum standard. The analysis should express the earn-out's expected present value as a percentage of total stated consideration. When contingent consideration represents more than 20 to 25% of total stated value, the transaction's effective economics become substantially sensitive to post-closing performance and buyer-controlled variables.
The second is tax analysis. This requires reviewing the specific contractual language covering employment arrangements, non-compete provisions, change-of-control acceleration, and formula mechanics — and engaging early with cantonal tax authorities to obtain a binding tax ruling, or Steuerruling, confirming that the earn-out will be treated as tax-exempt capital gains. A ruling requires time and documentation, but it eliminates the category of surprise that is most difficult to absorb after the deal has closed.
The earn-out, properly modelled and properly structured, remains a legitimate instrument for bridging valuation disagreement in Swiss SME transactions. The difficulty is not the instrument itself but the systematic tendency to evaluate it at face value rather than at expected present value, and to negotiate its economics before its tax treatment is secured.
A seller who has operated a business for twenty years deserves a transaction that reflects the actual economics of what is being agreed, not a ceiling figure that will only be reached under the most favourable conditions. Rigorous modelling and early tax analysis are not refinements reserved for large-cap transactions. They are the baseline standard of informed advice.
This post reflects market observation only and does not constitute legal, tax, or investment advice. Parties to any M&A transaction should engage qualified legal, tax, and financial advisors appropriate to their specific circumstances.
