Earn-Out Agreements in Startup Acquisitions: What Texas Founders Need to Know Before Signing

The acquisition offer lands. The headline number looks strong. But when you read past the first page of the term sheet, you discover that 30% of your purchase price isn't guaranteed—it's contingent on post-closing performance milestones that the buyer, not you, will control. That contingent portion is called an earn-out, and it's one of the most consequential deal terms in any startup acquisition.

Earn-outs are increasingly common in tech M&A. According to SRS Acquiom's 2025 M&A Deal Terms Study—which analyzed more than 2,200 private-target acquisitions valued at $505 billion—24% of private-target deals (excluding life sciences) included earn-out provisions in 2025, up from 19% in 2014 (SRS Acquiom, M&A Earnout and Milestone Trends). The ABA's 2025 Private Target M&A Deal Points Study found that 18% of transactions with purchase prices between $25 million and $900 million included earn-outs (K&L Gates, 2025 ABA Private Target Deal Points Study analysis).

The pitch is seductive: the buyer will bridge the valuation gap by paying you more if the business performs. But the data tells a different story. Across the SRS Acquiom dataset, earn-outs pay just 21 cents on the dollar—and 41% of earn-outs pay zero (Griffin Advisory Group, analysis of SRS Acquiom 2025 Deal Terms Study). At least 28% of earn-outs are formally disputed.

If you're a Texas founder negotiating an exit with an earn-out, understanding the structure, the risks, and the negotiation levers can be the difference between collecting your full purchase price and walking away with a fraction of what you were promised. We've written about the earnout trap from a measurement-and-dispute perspective. This guide focuses on how earn-out agreements work structurally, the top five risks for selling founders, and the specific negotiation tactics that protect your payout.

How Earn-Out Agreements Work: Timeframes, Metrics, and Triggers

An earn-out is a form of contingent consideration in an acquisition agreement. The buyer pays a portion of the purchase price at closing and promises to pay the remainder if the business achieves specified performance targets during a defined post-closing period. The ABA's Model Stock Purchase Agreement with Commentary provides the structural template that most practitioners follow, with earn-out provisions typically addressing four elements: the performance metric, the measurement period, the payment mechanics, and the protective covenants (ABA, Model Stock Purchase Agreement with Commentary).

Typical Timeframes

Earn-out periods in middle-market deals typically run one to three years, with most settling around two years. SRS Acquiom's data shows that earn-out performance periods shortened in 2024, with none exceeding four years (SRS Acquiom, 2025 M&A Deal Terms Study). Payments are usually calculated at the end of each measurement period—often annual—and delivered 60 to 120 days after the close of each period. Shorter earn-out periods favor sellers because they reduce the buyer's window to influence outcomes through integration decisions, resource reallocation, or strategic pivots (Davis Wright Tremaine, Earnouts in M&A Deals).

Metric Types: Revenue vs. EBITDA vs. Milestones

The three most common earn-out metrics are revenue, EBITDA (or net operating income), and operational milestones. Each carries different risk profiles for selling founders.

Revenue-based earn-outs are the simplest to calculate and the hardest for a buyer to manipulate, because revenue is a top-line number that doesn't depend on discretionary cost allocations. SRS Acquiom reports that 62% of 2024 earn-outs used revenue as the metric—a meaningful seller-side shift toward the harder-to-manipulate measure (Griffin Advisory Group). For high-growth tech startups where profitability hasn't stabilized, revenue is generally the safer choice for sellers.

EBITDA-based earn-outs capture profitability but introduce complexity. The buyer controls post-closing spending decisions, overhead allocation, and accounting methodology—all of which can reduce the measured EBITDA without any actual decline in business performance. As Davis Wright Tremaine explains, NOI-based earnouts provide the greatest opportunity for buyer spending decisions or expense allocation that weren't expected by the seller to result in an earn-out being reduced or not paid (DWT, Earnouts in M&A Deals).

Milestone-based earn-outs tie payments to non-financial events: product launches, regulatory approvals, patent issuances, or customer retention targets. These introduce a different problem—you're depending on the buyer to do something, and the buyer controls whether and how that happens. In Fortis Advisors LLC v. Johnson & Johnson, the Delaware Court of Chancery found that J&J breached its obligation to use "commercially reasonable efforts" to obtain regulatory approvals that served as earn-out milestones, with the court stating that "it is obvious from the record that J&J's efforts toward the iPlatform regulatory milestones were not commercially reasonable" (Skadden, Earnout Eruption: Delaware Courts Interpret Best Efforts Clauses).

Acceleration Triggers

Acceleration clauses cause the full earn-out (or a specified portion) to become immediately payable if certain triggering events occur. Common triggers include the buyer selling the business during the earn-out period, the buyer materially breaching its operating covenants, the buyer taking actions that make earn-out calculation impossible, or the buyer terminating the seller's employment without cause. Acceleration provisions prevent the buyer from "earning" a discount by disrupting the business and then claiming the targets weren't met (DWT, Earnouts in M&A Deals). For founders, acceleration triggers are among the most important protections—without them, a buyer can flip the acquired business, starve it of resources, or fire the founding team, and then point to missed targets as justification for non-payment.

The Top 5 Risks for Selling Founders

Risk 1: Buyer Under-Resourcing the Acquired Company

The core paradox of earn-outs is that the seller's payout depends on business performance, but the buyer controls the business. After closing, the buyer decides hiring, spending, product roadmap, customer relationships, and strategic priorities. A buyer that under-resources the acquired company—cutting sales teams, reducing marketing spend, deprioritizing product development—can systematically suppress earn-out targets without ever taking action that looks like deliberate sabotage.

In Shareholder Representative Services v. Albertsons Companies, the Delaware Court of Chancery allowed claims to proceed where Albertsons allegedly directed Plated to "drastically reallocate its resources to get a retail product into 1,000 stores in the span of one week," shifting marketing away from the e-commerce business that drove earn-out targets (SRS v. Albertsons, Del. Ch. June 7, 2021). The court found a reasonable inference that Albertsons intended to avoid short-term earn-out targets in favor of long-term gains.

Risk 2: Shifting Goalposts: Accounting Methodology Changes

If your earn-out is based on EBITDA or net operating income, the buyer controls the accounting post-closing. The buyer can change accounting methods, reallocate corporate overhead to the acquired business, reclassify expenses, or adopt different revenue recognition policies—all of which reduce the measured metric. A well-drafted earn-out should require the buyer to apply GAAP "consistent with the target company's historical practices" and should specify which expenses are included or excluded. Without this lock-in, the buyer's accounting choices can systematically erode your earn-out, as the definitions that seemed clear at signing become subject to interpretation post-closing (DWT, Earnouts in M&A Deals).

Risk 3: Change-of-Control Clauses That Void Your Earn-Out

Some earn-out agreements include change-of-control provisions that terminate the earn-out obligation if the buyer itself is acquired during the earn-out period. Without an acceleration clause tied to this event, a buyer can sell your company to a third party, and the earn-out you negotiated simply disappears. The new owner never agreed to pay it, and the original buyer's obligation terminates on the change of control. This is one of the most common mechanisms by which founders lose earn-out value through no fault of their own. An acceleration provision that triggers full payment upon any change of control of the buyer is essential to protect against this risk.

Risk 4: Integration That Obscures Standalone Performance

If the buyer integrates your product into its existing platform, the earn-out formula may become impossible to calculate. In Fortis Advisors, LLC v. Dematic Corp., the Delaware Supreme Court addressed a dispute over whether "Company Products" included the seller's standalone software or pieces of code integrated into the buyer's platform—a definitional ambiguity that led to litigation (Skadden, Earnout Eruption). The court found the term "Company Products" was ambiguous and relied on extrinsic evidence to determine intent. The lesson for founders: if integration will occur, the earn-out formula must account for it explicitly, with provisions that attribute revenue or metrics from integrated products back to the earn-out calculation—or that accelerate the earn-out if integration makes standalone measurement impossible.

Risk 5: Effort Standards That Don't Protect You

Most earn-out provisions include an effort standard—typically "commercially reasonable efforts," "best efforts," or "good faith"—that ostensibly requires the buyer to work toward achieving the earn-out targets. But Delaware courts have repeatedly shown that the specific language matters enormously.

In STX Business Solutions, LLC v. Financial Information Technologies, LLC, the Delaware Court of Chancery granted the buyer's motion to dismiss because the merger agreement gave the buyer "broad discretion to run the business so long as the Buyer did not take action in bad faith or with the specific intention of causing a reduction in the Earnout." The court held that "a party does not act in bad faith by relying on contract provisions for which that party bargained where doing so simply limits advantages to another party" (Skadden, Earnout Eruption). In other words, if you negotiate a buyer-friendly efforts clause, the buyer can make business decisions that suppress your earn-out—so long as it didn't act with "specific intention" to harm you.

In contrast, in SRS v. Alexion Pharmaceuticals, the court awarded approximately $130 million in damages after finding that Alexion breached its "commercially reasonable efforts" obligation by pursuing an idiosyncratic product-launch initiative instead of developing the earn-out-milestone drug (SRS v. Alexion, Del. Ch. Sept. 5, 2024). The difference between these outcomes turned on the specific language of the efforts clause and whether it imposed an objective external standard or a subjective good-faith standard.

What Delaware Courts Say About Earn-Out Disputes

Delaware courts have developed substantial precedent on earn-out disputes, and the pattern is clear: courts enforce what the agreement says, not what the seller hoped it would say. In Lazard Technology Partners v. Qinetiq North America Operations, the Delaware Supreme Court ruled that an express provision requiring "intent" to suppress an earnout could not be extended via the implied covenant of good faith and fair dealing. Conduct that had the effect of suppressing the earnout—but was not undertaken with that intent—was not a breach (Griffin Advisory Group, analysis of Lazard v. Qinetiq). The implied covenant will not fill contractual gaps that the parties could have addressed through explicit negotiation.

As Skadden's analysis notes, Delaware courts have seen an increase in earnout litigation, resulting in significant precedent interpreting what standards parties must meet to comply with these provisions. The main issue in these cases is whether the buyer complied with its responsibilities under a "best efforts" provision, which provides the buyer with discretion to run the surviving entity so long as the buyer's efforts are, for example, "reasonable," "commercially reasonable" or in "good faith" (Skadden, Earnout Eruption).

The practical takeaway: the effort standard you negotiate at signing determines your leverage post-closing. An outward-facing standard tied to industry benchmarks gives you far more protection than an inward-facing standard tied to the buyer's own practices.

Negotiation Strategies to Protect Your Payout

If an earn-out is unavoidable—and sometimes it's the only way to bridge a valuation gap—here are the protections we recommend founders negotiate before signing.

1. Shorter Earn-Out Periods

The longer the earn-out period, the more time the buyer has to integrate, restructure, or deprioritize your business. Push for one to two years maximum. Shorter periods reduce both the buyer's opportunity to influence outcomes and your exposure to integration disruption. SRS Acquiom's 2025 data confirms that earn-out periods are trending shorter, with none exceeding four years in the 2024 deal cohort (SRS Acquiom, 2025 Deal Terms Study).

2. Floors and Caps

Negotiate a floor—a minimum earn-out payment guaranteed regardless of performance. This converts part of the contingent consideration into certain consideration and shifts risk back to the buyer. Even a 50% floor dramatically improves your downside protection compared to an all-or-nothing structure. Caps, which limit the maximum earn-out payment, are typically buyer-proposed and should be negotiated to reflect realistic upside scenarios (DWT, Earnouts in M&A Deals).

3. Independent Auditor Arbitration

Most earn-out provisions include a dispute resolution mechanism: the buyer delivers its calculation, the seller has 30 to 60 days to object, and unresolved disputes go to a neutral third-party accounting firm. This framework sounds fair, but structural features tilt it toward buyers. The buyer prepares the initial calculation, the seller must identify specific objections within a compressed window, and the accountant's review is typically limited to disputed items rather than a full de novo review. Negotiate for: (1) express seller access to the buyer's financial records and personnel during the review period, (2) a longer objection window, (3) cost allocation that penalizes the party whose position is further from the accountant's determination, and (4) a provision that the accountant's determination is binding "absent manifest error"—a high bar for reversal (DWT, Earnouts in M&A Deals).

4. Accelerator on Termination Without Cause

Include acceleration clauses that cause the full earn-out to become immediately payable if the buyer terminates your employment without cause during the earn-out period. Without this protection, a buyer can fire you, replace you with someone who lacks your industry relationships and institutional knowledge, and then point to underperformance as justification for non-payment. Acceleration on termination without cause ensures that if the buyer removes you from the equation, they pay for the consequence.

5. Operating Covenants with External Benchmarks

Negotiate operating covenants that require the buyer to run the business "in the ordinary course consistent with past practices" and to use "commercially reasonable efforts" defined by reference to industry standards, not the buyer's own past practices. As the Delaware case law shows, outward-facing standards give you a meaningful benchmark to enforce; inward-facing standards give the buyer cover for almost any decision. Pair this with a requirement that the buyer maintain separate books and records for the acquired business during the earn-out period, so you can actually audit the numbers (DWT, Earnouts in M&A Deals).

6. Scaled or Tiered Structures

Scaled earn-outs—where partial achievement triggers partial payments—are more favorable than binary structures where the full amount is paid only if the target is met and nothing is paid if it falls short by even one dollar. Tiered structures reduce the cliff effect and give you partial recovery even if the business narrowly misses targets. For more on how earn-out structures interact with other deal terms, see our guide to non-compete provisions in startup M&A and our analysis of reverse termination fees that protect you if the deal itself falls apart.

Why Texas Founders Face This Now

Texas tech M&A activity remains strong. Baker Tilly Capital's Texas regional M&A update reported 33 middle-market transactions in H1 2024, an 18% increase from H2 2023, with aggregate disclosed deal value of $8.3 billion—a 32% increase. Strategic buyers represented approximately 58% of closed transactions, with information technology accounting for 12% of all Texas M&A deals (Baker Tilly Capital, Texas Regional M&A Update: H1 2024).

As financing conditions tighten and buyers become more cautious about forward-looking valuations, earn-outs are increasingly used to bridge the gap between what founders believe their company is worth and what buyers are willing to pay upfront. For Texas founders, this means more deals will include contingent consideration—and more founders will face the risks that come with it. You should also understand how earn-outs interact with your tax planning; see our guide to Section 280G golden parachute tax traps for how accelerated equity and deal bonuses can trigger additional excise tax exposure.

Actionable Next Steps

1. Model the worst case before you sign. Before agreeing to an earn-out, model what happens if the business achieves 50% of targets. At the empirical 21-cent-on-the-dollar payout rate, a $10 million earn-out has an expected value of approximately $2.1 million. If that number doesn't work for your cap table, don't sign.
2. Negotiate the metric carefully. Push for revenue-based earn-outs with clearly defined recognition rules rather than EBITDA-based metrics that give the buyer discretion over expense allocation. Define every term precisely—ambiguity favors the buyer, always.
3. Insist on floors, acceleration, and operating covenants. A minimum guaranteed payment, acceleration triggers (especially on change of control and termination without cause), and operating covenants tied to external industry benchmarks are your insurance policy against buyer-induced underperformance.
4. Require separate books and seller access rights. The buyer must maintain separate books and records for the acquired business during the earn-out period, and you must have express rights to access financial records and personnel during each review period.
5. Engage experienced M&A counsel before the LOI. Earn-out provisions are highly negotiated, deal-specific terms that determine whether you collect millions in contingent consideration or walk away with nothing. The difference between a well-negotiated earn-out and a poorly negotiated one can be the difference between your full purchase price and a fraction of it. Get counsel who understands earn-out negotiation strategy, the Delaware case law on efforts clauses, and the interaction between earn-outs and your other deal terms before the LOI is signed—not after.

An earn-out agreement is not a bonus. It's part of your purchase price, paid in installments that depend on someone else's business decisions. Treat it with the same intensity you bring to valuation and equity terms—because when the earn-out doesn't pay, the headline number on your term sheet was never your real price.