Earn-outs are a common way to bridge a valuation gap in M&A: the buyer pays part of the purchase price today, and the rest later if the business hits agreed performance targets.
Related: Working capital peg & closing adjustments (purchase price true-up) often interacts with earn-out definitions and post-close economics.
Key takeaways
- An earn-out is pricing + risk allocation. Treat it like a mini contract-within-a-contract: define metrics, measurement rules, and control rights.
- Most disputes come from vague definitions (EBITDA adjustments, revenue recognition, working capital, intercompany charges) and unclear post-close operating covenants.
- Accounting: earn-outs are usually contingent consideration measured at fair value on Day 1 with subsequent remeasurement (often through earnings) depending on the framework and classification.
- Tax: treatment depends on facts and jurisdiction. Structure and drafting can materially change outcomes (capital vs income, withholding, allocation). Always coordinate tax early.
What is an earn-out?
An earn-out is a contractual mechanism where the seller receives additional consideration after closing if the target achieves specified milestones over an earn-out period (often 12–36 months). Milestones are typically based on revenue, EBITDA, gross profit, customer retention, or product/operational milestones.
Why buyers and sellers use earn-outs
- Valuation gap: Seller believes growth will continue; buyer wants proof.
- Information risk: Short history, customer concentration, churn, or product roadmap uncertainty.
- Retention + transition: Keeps key sellers/operators incentivized post-close.
- Downside protection: Buyer avoids overpaying if performance under-delivers.
Common earn-out structures
- Single metric (simple): e.g., revenue ≥ $X over 12 months.
- Tiered / sliding scale: payouts at multiple thresholds.
- Multiple-year earn-out: yearly tranches or cumulative measurement.
- Milestone-based: product launch, regulatory approval, signed customers.
- Cap + floor: limits payout volatility.
Drafting checklist: how to avoid disputes
If you only do one thing: write the metric like an accountant would. Assume an adversarial reader.
1) Define the metric precisely
- Revenue: recognize on invoice? cash? GAAP/IFRS? net of refunds? treatment of multi-element arrangements?
- EBITDA: list add-backs and exclusions; specify accounting policies; define “one-time” and “non-recurring”.
- Gross profit: define COGS and allocations (hosting, support, shared services).
2) Specify measurement rules
- Measurement period, cut-off dates, and how partial months are handled.
- Whether the buyer can change accounting policies post-close (and if so, how that affects the metric).
- How acquisitions, divestitures, and new business lines are treated.
3) Control and operating covenants
- Is the buyer required to operate the business “consistent with past practice”?
- What decisions need seller consent (pricing changes, cost allocations, layoffs, major customer terms)?
- What happens if the buyer integrates the target (shared services, cross-selling, bundling)?
4) Reporting, audit, and dispute resolution
- Timeline for buyer calculation and seller review.
- Seller access to supporting schedules, GL detail, and customer-level reports.
- Independent accountant/arbitrator mechanism and scope (technical accounting vs legal interpretation).
Accounting overview: contingent consideration
In purchase accounting, earn-outs are commonly treated as contingent consideration and recorded at fair value at the acquisition date. Subsequent changes in fair value are often recognized in earnings (subject to the applicable standard and whether the earn-out is classified as a liability or equity).
Practical implication: even if the earn-out is “future pricing,” it can create volatility in post-close earnings through fair value remeasurement. This is a reason finance teams care about earn-out design, not just lawyers.
Tax considerations (high-level)
Earn-outs can be treated differently for tax depending on the structure and jurisdiction: part of purchase price, compensation for services, interest-like amounts, or something else. Key practical issues include:
- Character: capital vs income (and whether payments look like employment/bonus).
- Withholding: cross-border payments can trigger withholding requirements.
- Allocation: earn-out may need to be allocated among asset classes in an asset deal.
- Timing: recognition timing can differ between buyer and seller.
A simple example
Assume a buyer pays $10M at closing plus a $5M earn-out if 12-month revenue ≥ $15M. If revenue ends at $16M, the seller receives $5M (subject to the agreement’s calculation and any caps/floors). The buyer’s finance team will also track (and often remeasure) the fair value of the expected earn-out over the period.
Related reading
- Asset Purchase vs Share Purchase (deal structure and tax comparison)
- Goodwill and Intangible Assets in M&A (earn-outs affect goodwill calculation)
- Pre-closing transactions (what they are + common examples)
- Indemnity clauses in M&A (risk allocation basics)
- Tax due diligence (what to look for)
- Purchase Price Allocation under IFRS 3 (earn-outs are contingent consideration)
- Corporate finance and taxation (related categories)
