Allocating Jurisdiction between Accounting Experts and Arbitrators in Earn Outs

Schism

The allocation of dispute resolution authority in cross-border sale agreements establishes two distinct forums with fundamentally different procedural protections. Purchase agreements routinely bifurcate post-closing controversies between independent accounting firms and arbitral tribunals. The accounting referee receives authority over mathematical computations, working capital reconciliations, and earn-out calculations.

The arbitral tribunal retains jurisdiction over general contractual breaches, breach of representations, operational covenants, and statutory claims. The division of authority is fragile.

Litigation arises when an operational dispute masquerades as an accounting variance. A seller disputing an earn-out calculation rarely confines the challenge to clerical arithmetic. The seller typically asserts that the buyer diverted revenue to adjacent corporate entities, delayed product releases until after the measurement period, or altered inventory valuation methodologies.

These claims involve breaches of operating covenants, the covenant of good faith and fair dealing, and contractual definitions. When the purchase agreement directs all earn-out disputes to an independent accountant, the parties confront an immediate jurisdictional threshold regarding whether the expert or an arbitrator possesses the adjudicatory power to resolve the underlying claim.

Courts examine whether the disputed clause creates an expert determination or an arbitration. An agreement to submit purchase price or earn-out computations to an accounting firm qualifies as an expert determination under Delaware and New York law unless the contract explicitly grants arbitral powers. Under English law, the distinction between an expert and an arbitrator governs procedural rights, discovery entitlements, and the finality of the determination.

Arbitrators decide legal controversies pursuant to statutory procedural frameworks, including the Federal Arbitration Act or the English Arbitration Act 1996. Accounting experts decide discrete factual or financial questions within their specialized professional knowledge, devoid of formal evidentiary hearings, witness examinations, or compelled document production.

The Dual Dispute Architecture

Transactional documentation consistently pairs a specialized financial resolution clause with a broad, omnibus arbitration provision. The specialized clause appears directly within the earn-out section of the share purchase agreement, setting strict deadlines: thirty days for buyer statement delivery, thirty days for seller objection notices, thirty days for commercial negotiation, and thirty days for expert determination. The general dispute resolution clause sits among the miscellaneous provisions at the end of the contract, selecting an institutional forum such as the International Chamber of Commerce, the London Court of International Arbitration, or the American Arbitration Association.

Jurisdiction dictates the outcome. The omnibus arbitration clause typically encompasses any controversy, claim, or dispute arising out of or relating to the contract, its interpretation, performance, or breach. When the earn-out provision states that any dispute regarding the earn-out calculation will be referred to an independent accountant, the two clauses point in opposite directions.

The structural tension between a broad general arbitration clause and a narrow expert determination clause generates immediate satellite litigation regarding competence-competence. The primary question becomes whether the court, the arbitrator, or the accountant determines which forum decides the matter.

Threshold Boundaries of Authority

The scope of the accounting expert’s authority depends entirely on the contractual grant. In Markow v. Synageva BioPharma Corp. and Penton Business Media Holdings, LLC v.

Informa PLC, the Delaware Court of Chancery established that an accounting expert lacks jurisdiction to interpret legal terms unless the agreement unmistakably assigns legal interpretation to that accountant. The typical formulation commits disputes regarding the calculation of the Earn-Out Statement to the expert. That text confines the expert to mathematical reconciliation and the application of stated accounting principles.

When the purchase agreement fails to explicitly empower the accountant to evaluate allegations of operational misconduct, the accountant’s determination on those legal issues remains vulnerable to judicial vacatur. An accounting expert who assesses whether a buyer deliberately suppressed post-closing sales acts beyond delegated authority. That operational assessment belongs before an arbitral tribunal convened under the general dispute resolution clause.

The consequence of conflating these tracks is complete procedural nullification: the parties incur substantial expert advisory fees across twelve months only to have a court set aside the expert determination on jurisdictional grounds, restarting the entire dispute inside an arbitral forum.

Seam

The legal boundary dividing financial measurement from contract interpretation sits at the point where accounting rules depend on legal characterizations. Calculations never exist in a vacuum. An earn-out metric structured around earnings before interest, taxes, depreciation, and amortization requires specific adjustments defined in the agreement.

When the buyer deducts restructuring costs, acquisition expenses, or corporate management fees, the dispute raises both accounting compliance and contractual authorization. The accountant can calculate the sum of the adjustments. The accountant cannot independently rule on whether the contract permitted the buyer to execute the restructuring without seller consent.

Language precedes arithmetic. In cross-border venture exits, founders frequently surrender operational control in exchange for an earn-out tied to gross revenue or EBITDA targets. The buyer assumes day-to-day command while promising to operate the acquired business in the ordinary course and refrain from taking actions whose primary purpose is reducing earn-out consideration.

If the buyer consolidates the acquired sales force into its global enterprise network, revenues attributable to the target entity become obscured. The founder frames the resulting revenue drop as an operational breach of covenant. The buyer frames the dispute as an accounting matter concerning the proper allocation of consolidated sales under Generally Accepted Accounting Principles or International Financial Reporting Standards.

A standard accounting determination clause that directs all calculation disagreements to an independent accountant deprives the seller of formal discovery on pre-closing operational covenants.

Contractual Interpretation versus Numeric Computation

The determination of whether an item represents an accounting issue or a legal issue depends on the primary source of the rule governing the dispute. If the resolution turns on whether an entry conforms to GAAP or past practice consistently applied, the matter falls on the accounting side of the boundary. If the resolution turns on whether a party breached a negative covenant, an integration covenant, or an implied duty, the matter sits on the arbitral side.

Delaware precedent treats accounting dispute clauses as narrow submissions. In Ray Beyond Corp. v. Trimaran Fund Management, L.L.C., the court ruled that an expert determination clause referencing calculation disputes did not confer authority on the accountant to adjudicate whether an acquisition constituted an extraordinary transaction under the contract.

The interpretation of transactional terminology remains an exclusively legal task. The table below delineates the institutional allocation across standard dispute categories in transaction agreements.

Can Accounting Standards Resolve Contractual Ambiguity?

GAAP and IFRS provide frameworks with wide bands of professional discretion rather than single mathematical answers. Revenue recognition under ASC 606 requires five analytical steps, several of which involve management estimates of standalone selling prices and variable consideration. When an earn-out agreement directs the buyer to prepare accounts in accordance with GAAP applied consistently with past practice, a hierarchy conflict arises whenever past practice deviated from strict GAAP.

The numbers follow the text.

An accounting expert asked to resolve this hierarchy must interpret the contractual phrase consistently with past practice. Some state courts hold that an accounting expert possesses incidental authority to interpret contractual terms necessary to complete the assigned calculation. Other jurisdictions, notably New York in decisions like Matter of Westmoreland Coal Co. v.

Entech, Inc., preserve a strict separation, holding that broad legal questions of contractual interpretation cannot be decided by an accountant under a standard calculation submission clause. Inserting the phrase acting as an expert and not as an arbitrator restricts the reviewer strictly to technical accounting metrics, preserving legal claims for an arbitral tribunal.

Mandate

The engagement letter signed by the parties and the accounting expert establishes the outer boundary of the referee’s adjudicative power. In cross-border venture exits, parties often spend months negotiating the share purchase agreement, only to sign an unexamined standard engagement letter provided by a major accounting firm. This oversight creates severe jurisdictional exposure.

The accounting firm’s standard terms routinely disclaim any legal interpretation, limit financial liability to the fee received, reject formal discovery protocols, and mandate summary dismissal of covenant claims. The engagement letter supersedes conflicting provisions in the sale contract when executed by all three entities.

An earn-out calculation under an earn-out cap of 12,500,000 euros swings by more than forty percent based entirely on the priority given to past practice over baseline IFRS accounting.

The Accounting Principles Waterfall

Precision in drafting requires an explicit accounting waterfall within the earn-out schedule. The waterfall establishes the order of precedence for resolving accounting methodology disagreements, preventing the expert from substituting general professional preferences for agreed transaction metrics.

A rigorous waterfall operates through sequential levels. The first level mandates specific accounting treatments set forth in the earn-out schedule, including agreed add-backs for transaction expenses, founders’ severance, and pre-closing research write-offs. The second level mandates consistency with the target company’s historical accounting policies and past practices, protecting the seller against post-acquisition accounting shifts.

The third level applies standard GAAP or IFRS in effect on the closing date. Silence breeds litigation.

Worked Adjustment Case

The commercial impact of jurisdictional allocation becomes evident through a worked post-closing earn-out computation. Take an acquisition of an enterprise software company with a base purchase price of 45,000,000 euros and an earn-out consideration of 10,000,000 euros payable if target-generated EBITDA reaches 15,000,000 euros in year two post-closing. If EBITDA falls between 12,000,000 euros and 15,000,000 euros, the payout scales linearly at 3.33 euros per euro of EBITDA above 12,000,000 euros.

Below 12,000,000 euros, the earn-out yields zero.

The buyer delivers an earn-out statement showing EBITDA of 11,200,000 euros, resulting in zero payment. The seller delivers a timely dispute notice challenging four specific items totaling 4,800,000 euros in adjustments:

1. Capitalized Software Development Costs of 1,600,000 euros that the buyer expensed immediately under its corporate accounting policy, whereas the target company historically capitalized development payroll under IAS 38.
2. Central Corporate Overhead Allocation of 1,400,000 euros charged by the buyer for shared enterprise legal, human resources, and cloud infrastructure costs, which the seller asserts violates the ordinary course covenant.
3. Deferred Revenue Acceleration of 1,100,000 euros omitted from current EBITDA because the buyer renegotiated customer terms into multi-year commitments under revised ASC 606 revenue recognition criteria.
4. Severance and Retention Payments of 700,000 euros incurred to replace departing European sales personnel, which the seller classifies as non-operating transition expenses.

If the accounting expert adjudicates all four items, the expert applies accounting standards to item one, restoring 1,600,000 euros based on past practice priority. The expert applies technical standards to item four, restoring 700,000 euros as non-recurring items. The expert rejects item two and item three, stating that corporate cost allocations and customer contract amendments involve legal definitions of ordinary course operations and implied good faith.

The resulting EBITDA equals 13,500,000 euros. Under the linear formula, the seller receives 4,995,000 euros. If the seller bifurcates the proceedings, sending items two and three to an ICC arbitral tribunal, the arbitrator evaluates evidence regarding whether the buyer diverted resources or loaded corporate costs to depress the earn-out.

Finding a breach of the operational covenant, the tribunal adds back the 1,400,000 euro overhead and 800,000 euros of deferred revenue, elevating EBITDA to 15,700,000 euros and unlocking the full 10,000,000 euro earn-out payment.

Buyers defend unilateral accounting changes by asserting that acquired entities cannot maintain outdated, non-compliant bookkeeping practices inside a publicly traded multinational enterprise.

Review

Finality provisions in purchase agreements state that the determination of the accounting expert will be final, conclusive, and binding on the parties, absent manifest error or fraud. Courts strictly enforce this finality language. The standard of review applied to an expert determination is substantially narrower than the review applied to an arbitral award.

An expert determination cannot be challenged for simple mistakes of law or erroneous factual findings. Unless the contract defines manifest error, courts interpret the phrase as an obvious error of mathematical computation or an error appearing on the face of the award that requires no external inquiry.

Discretion is not absolute. When parties select an expert determination, they sacrifice extensive appellate rights in exchange for speed and reduced expenditure. If an accounting firm applies an erroneous valuation multiple or misapplies an amortization formula, the resulting dollar figure remains binding if the decision remained within the accountant’s mandate.

Setting aside an expert determination requires proving that the expert exceeded the contractual grant of authority or acted with demonstrable partiality.

Standards of Finality

Judicial treatment diverges significantly depending on the governing legal system. Under English law, as established in Barclays Bank plc v. Nylon Capital LLP, an expert determination on a point of contractual interpretation does not bind the parties if the contract did not expressly authorize the expert to resolve questions of law.

Lord Neuberger affirmed that the court retains ultimate jurisdiction over contract construction unless the parties use unambiguous language conferring exclusive legal jurisdiction upon the expert. Under the New York Civil Practice Law and Rules Section 7601, an appraisal or valuation proceeding can be confirmed or challenged using standards similar to arbitration, but courts routinely enforce the restricted mandate agreed in the transaction documentation.

Grounds for Setting Aside Determinations

Challenging an adverse accounting determination requires establishing a structural failure rather than a computational disagreement. Parties seeking judicial invalidation proceed through a structured legal sequence:

1. The applicant demonstrates that the expert exceeded contractual boundaries by adjudicating matters outside the calculation schedule, such as resolving breach of contract claims.
2. The applicant establishes that the expert failed to follow the mandatory procedural instructions, including refusing to apply the contractually defined accounting principles waterfall.
3. The applicant identifies palpable mathematical blunders on the face of the determination sheet that produce mathematical distortion without requiring extrinsic evidence.
4. The applicant proves evident partiality, active fraud, or collusion between the accounting referee and the counterparty during the determination process.

Bad faith destroys finality. If an accountant departs from the assigned instructions, the resulting calculation is voidable because the referee acted outside the delegated mission. A decision rendered without contractual authority carries no binding effect.

Interplay

Parallel proceedings present the most severe operational threat to deal certainty in earn-out disputes. When a seller files a notice of arbitration for breach of operational covenants while simultaneously submitting calculation disagreements to an independent accountant, the risk of inconsistent outcomes and conflicting monetary determinations escalates immediately. The two forums proceed on different timelines under different procedural rules.

An accountant may render a final, unreviewable determination within sixty days, while an arbitral tribunal takes two years to conduct document production and complete evidentiary hearings.

An accounting expert determination rendered before an arbitral award on operational covenants creates irreconcilable issue preclusion risks.

Timing controls the remedy. If the accounting expert issues an award first, the buyer argues that the calculation constitutes res judicata, barring the seller from relitigating those same financial components as damages inside the arbitration. Conversely, if the arbitral tribunal issues an award finding that the buyer breached the ordinary course covenant, the arbitrator must decide whether to award expectation damages directly or order the buyer to revise the earn-out statement and resubmit the figures to the accounting expert.

Arbitrators interpret legal duties.

Sequencing Concurrent Claims

The primary tactical decision in an earn-out dispute is whether to stay the accounting expert determination pending the conclusion of the arbitration. If the arbitral claims challenge the foundational data feeding the financial metrics, proceeding with the accounting determination first creates wasted effort. If the seller asserts that customer contracts were wrongfully assigned away from the target business, the accountant cannot inspect records that do not exist in the acquired company’s ledger.

The accounting referee can only evaluate the figures recorded on the books.

Courts apply varying tests to requests for preliminary injunctions or stays of expert determinations. Under the Federal Arbitration Act, federal courts frequently decline to stay an expert determination if the purchase agreement explicitly requires calculation disputes to proceed under strict contractual deadlines. The Delaware Court of Chancery will enjoin an expert determination where the threshold issue of arbitrability remains contested, preserving arbitral jurisdiction until the tribunal defines the boundaries of the dispute.

May Parallel Proceedings Proceed Simultaneously?

Simultaneous proceedings consume enormous resources and create procedural conflicts. If the independent accountant interprets an accounting definition that overlaps with a contractual definition under arbitral review, the parties face competing determinations. The failure modes listed below emerge routinely in parallel cross-border earn-out litigation:

• Inconsistent Evidentiary Records generated when an accountant reaches conclusions based strictly on written party submissions, while an arbitral tribunal uncovers contradictory internal executive emails during formal document disclosure.
• Premature Calculation Enforcement where the buyer obtains entry of judgment on a favorable accounting expert award while an arbitration concerning the buyer’s intentional operational sabotage of target performance remains pending.
• Waiver of Arbitral Claims resulting from a party presenting mixed legal and financial arguments to an accounting referee without explicitly reserving its rights to arbitrate legal breaches.
• Double Recovery Confusions arising when an arbitral tribunal awards contract damages for breach of covenant, overlapping with adjustments already incorporated into the expert’s revised EBITDA figure.

The operational question remains unsettled whether a buyer can successfully compel arbitration of an entire earn-out controversy based solely on an omnibus arbitration clause when the specific accounting clause lacks express subordination language.

Remedy

A determination by an accounting expert does not possess the status of an arbitral award. An expert determination cannot be registered immediately as a court judgment under the Federal Arbitration Act or recognized internationally under the 1958 Convention on the Recognition and Enforcement of Foreign Arbitral Awards (the New York Convention). To convert an expert determination into executable cash proceeds, the prevailing party must commence an action for breach of contract, file a motion for summary judgment in lieu of complaint under rules such as New York CPLR 3213, or obtain an arbitral award that formally incorporates the expert’s mathematical findings.

The distinction carries steep financial stakes. When cross-border venture exits involve assets distributed across multiple jurisdictions, enforcing an expert determination against an uncooperative buyer requires bringing separate plenary contract actions in every foreign court where the buyer holds bank accounts. If the dispute is resolved by an arbitral tribunal, the resulting award benefits from the streamlined enforcement mechanics of the New York Convention across more than 170 contracting states.

International enforcement considerations dictate the initial dispute architecture.

Enforcement Mechanisms for Net Consideration

Sophisticated exit agreements bridge this enforcement gap through two-step integration provisions. The contract specifies that the accounting expert functions strictly as an appraiser, but provides that the expert’s final certificate must be submitted directly to an arbitral tribunal for formal confirmation as a consent award if payment is withheld beyond ten business days. This mechanism converts the expert’s financial calculation into an internationally enforceable New York Convention instrument without undergoing full-scale arbitral proceedings.

Speed comes at a price. Sellers often believe that assigning all disputes to an accounting expert will guarantee a rapid, low-cost resolution within ninety days. In practice, an accounting firm confronted with complex covenant claims and disputed legal definitions will suspend its work, demand indemnification agreements, and instruct the parties to obtain declaratory relief from a court before proceeding.

What appeared to be an expedited procedure becomes an expensive multi-forum endurance contest.

Drafting Safeguards for Deal Architecture

Preventing jurisdictional failure requires defensive drafting when the sale agreement is initially executed. The parties must structure the dispute resolution architecture with definitive boundaries that eliminate ambiguities before post-closing operations begin.

The contract must explicitly state that the independent accountant possesses zero authority to interpret legal terms, review operational covenants, or assess claims involving good faith. The agreement must establish that any operational breach of covenant must be submitted exclusively to arbitration, with the arbitral tribunal possessing the express power to stay the accounting expert determination until liability is determined. The definition of the accounting referee’s scope must be restricted to resolving specific written objections to computational line items based strictly on the accounting waterfall.

The contract must mandate that the arbitral tribunal will calculate consequential damages and order specific performance regarding earn-out adjustments, leaving only mathematical execution to the accountant. These drafting boundaries preserve the integrity of both forums and ensure that net exit proceeds remain protected against procedural derailment.