Earn-outs in a higher-rate environment: the one deal structure CFOs need to rethink

Earn-outs are deferred payment arrangements tied to the future performance of an acquired business. The buyer pays a base price at closing and promises additional consideration if the target hits defined milestones, typically revenue, EBITDAEBITDAEBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization) measures a company's operating profitability before financing and accounting decisions, used to compare core performance across firms.View full definition →, or a specific product milestone, over a one-to-three-year post-closing period. On paper, they bridge valuation gaps. In practice, they generate more post-deal disputes than almost any other transaction mechanism. The rate environment of the past two years has made that tension sharper, and the way CFOs think about earn-outs needs to reflect that.

Why earn-outs matter more now for CFOs specifically

When rates were effectively zero, the time value of a deferred payment was trivial. A $50 million earn-out payable in two years cost almost nothing more to promise than $50 million today. That calculus no longer holds. With the US Federal Reserve keeping benchmark rates elevated through much of 2025 and the ECB maintaining a restrictive stance into 2026, the present value of a deferred payment is materially lower than its face value. A buyer promising $50 million in 24 months, discounted at a rate reflecting current capital costs, is actually offering something closer to $43 to $45 million in economic terms. Sellers who do not model this explicitly are leaving money on the table.

For a CFO on either side of a deal, this changes the math in two specific ways. First, the earn-out becomes a more powerful tool for a buyer to compress effective deal consideration while maintaining a headline number that keeps sellers at the table. Second, for the seller's CFO, the financing structure of the earn-out, particularly whether it carries an interest rate or not, becomes a genuine valuation issue rather than a footnote.

There is also a credit risk dimension that was nearly invisible in a low-rate world. If the acquirer is itself carrying more expensive debt, its capacity to pay out a large earn-out in year two is not guaranteed. Sellers need to treat the earn-out as an unsecured credit exposure to the buyer.

How earn-outs actually work: the mechanics

The structure is straightforward in concept. At signing, the parties agree on a purchase price split between a fixed closing payment and a contingent earn-out component. The earn-out is governed by a detailed definition of the metric being tracked and a schedule of payouts linked to performance thresholds.

Take a concrete example. In late 2024, a mid-market software acquirer bought a SaaS business generating $18 million in ARRARRAnnual Recurring Revenue (ARR) is the normalized, predictable revenue a subscription business expects to earn from active contracts over a single year.View full definition →. The seller wanted $90 million. The buyer, constrained by the cost of acquisition financing at roughly 8%, was willing to pay $70 million. The gap was bridged with a $20 million earn-out tied to the business reaching $26 million ARR within 24 months of closing.

The earn-out agreement defined ARR using the target's existing methodology, set a single payout trigger at the full $20 million if the threshold was met (no sliding scale), excluded ARR contributions from other acquisitions the buyer might make into the same business unit, and specified that disputes would go to a neutral accounting firm rather than arbitration. That level of definition matters enormously. The two most common earn-out failure modes are metric ambiguity and post-close integration decisions by the buyer that make it structurally impossible for the target to hit the milestone.

That second failure mode is the one higher rates amplify. When an acquirer is under pressure to reduce costs quickly to service acquisition debt, it frequently cuts sales headcount, consolidates systems, or redirects product roadmaps, all decisions that undermine the earn-out business's ability to perform. The interests are directly misaligned.

When to use earn-outs and when to walk away from them

Earn-outs work best in a specific set of circumstances. They are genuinely useful when the target's value depends heavily on uncertain future outcomes: a biotech asset waiting for Phase III data, a software product mid-launch, a founder-led services business whose revenue is tied to relationships that may or may not transfer. In these cases, the earn-out is not just a valuation compromise, it is appropriate risk allocation.

They also work well when the seller retains operational control post-close, either running the business as a standalone subsidiary or staying on in a defined leadership role with clear authority over the metrics being measured. Arm & Hammer's approach to tuck-in acquisitions of smaller brands has historically preserved this kind of operational continuity, which is part of why those deals tend to close without earn-out litigation.

The situations where earn-outs become expensive mistakes are more numerous. Full integration deals, where the target's operations are absorbed into the buyer's existing structure within six to twelve months, create immediate metric contamination. How do you calculate the acquired business's standalone EBITDA once its finance function, IT systems, and sales team have been merged? You cannot, which is exactly when earn-out disputes begin.

In a higher-rate environment, there are two additional cautions. First, if the buyer is financing the acquisition with leveraged debt at current market rates, the earn-out payout competes with debt service obligations. Sellers should demand either an escrow account funded at close, a letter of credit, or a parent guarantee. An unsecured promise from a leveraged buyer is not the same instrument it was in 2020. Second, be cautious about long earn-out windows. A three-year earn-out at a discount rate of 8% represents significant economic erosion. If the seller is treating it as part of their proceeds, the present value needs to be calculated honestly at the start, not optimistically.

The honest tradeoff is this: earn-outs preserve deals that would otherwise fall apart on price, and that has real value. But they introduce operational conflict, legal exposure, and credit risk that compound the longer they run and the more integrated the post-close structure becomes.

In the current rate environment, a shorter earn-out window with a higher base price, even if it requires the buyer to take on slightly more closing-day risk, is often a cleaner structure than a longer deferred payment that looks attractive on paper but creates two years of management distraction and legal exposure. CFOs who push for definitional clarity upfront, and who model the present value of the earn-out honestly from day one, will avoid most of the disputes that make these instruments so costly in practice.