Post-Closing Purchase Price Adjustments: Working Capital and Disputes

Most private acquisitions are priced on a cash-free, debt-free basis with a normal level of working capital delivered at closing. Because nobody knows the closing balance sheet on the closing date, the parties estimate it, close on the estimate, and then true it up once the actual numbers are known. That true-up is the working capital adjustment.

It is presented in the agreement as a computation. In practice it is a contract dispute waiting for a trigger, and the trigger is almost never a mistake in addition. It is a disagreement about which accounting treatment the contract required.

The three parts that carry the whole mechanism

Strip away the drafting and every true-up has the same skeleton. A target — the peg — states the amount of working capital the business is expected to deliver. A methodology states how working capital will be measured. A referee mechanism states who resolves a disagreement and what that person is allowed to decide. Weakness in any one of the three transfers value to the party with the better lawyers, not to the party with the better business.

The peg is usually derived from a trailing average — twelve months is the common convention — adjusted for seasonality, one-off items, and any change in the business between the reference period and signing. Two questions do more work than the number itself. First, is the peg calculated on the same basis the closing statement will use? A target built from historical management accounts and a closing statement built on the buyer's post-closing policies will never reconcile. Second, is there a collar, so that small variances do not trigger a payment at all? A dead band of one or two percent removes a large share of low-value disputes.

Methodology: where the money actually moves

A definition that says working capital will be determined "in accordance with GAAP" is an invitation. Generally accepted accounting principles permit ranges of treatment for exactly the items that matter most in a closing balance sheet. Better agreements set a hierarchy and say which level wins when they conflict.

1. Level one

   Specifically defined accounting principles, adjustments, and inclusions or exclusions negotiated for this deal and set out in a schedule.

2. Level two

   The methodologies actually used in preparing the sample calculation attached to the agreement, applied consistently.

3. Level three

   The target's historical accounting practices, applied consistently with the reference period.

4. Level four

   GAAP, as the residual default for anything the first three levels do not address.

State expressly that the earlier levels control over the later ones. Without that sentence, a buyer will argue that GAAP overrides an inconsistent historical practice, and a seller will argue that consistency overrides GAAP. That single ambiguity is the most common source of eight-figure true-up fights.

Attach a sample calculation using a real recent period. A worked example does more to prevent disputes than any amount of definitional prose, because it demonstrates the intended treatment of every line rather than describing it.

The timeline, and why the dates are conditions

1. Before closing

   The seller delivers an estimated closing statement, usually three to five business days out. The purchase price paid at closing moves dollar for dollar against the peg.

2. Closing

   The estimate is funded. An adjustment escrow is often held back to secure any downward true-up, sized against the expected variance rather than the whole exposure.

3. 60 to 90 days after closing

   The buyer delivers the actual closing statement with supporting detail. Weak clauses omit the detail requirement and leave the seller reviewing a conclusion.

4. Review period

   The seller gets access to books, records, and the people who prepared the statement, for a defined window. Without an express access right the objection process is theater.

5. Objection window

   Commonly 30 to 45 days. The objection notice must identify each disputed item and the seller's proposed value; unlisted items are usually deemed accepted.

6. Negotiation period

   A fixed number of days for the parties to resolve items directly before any neutral is engaged.

7. Referral to the neutral

   Remaining items go to the designated accounting firm, whose determination is typically final and binding on those items.

8. Payment and release

   The final amount is paid, and the adjustment escrow releases the balance.

Deadline discipline: objection periods are drafted as conditions, not preferences. A seller that misses the window can find the buyer's statement contractually final regardless of whether it was right. Calendar the date at closing, not when the statement arrives.

What the neutral accountant may and may not decide

The neutral is usually appointed as an expert, not an arbitrator. The distinction has consequences. An expert determines specified questions within a defined mandate, and judicial review is generally limited to whether the expert acted within that mandate. An arbitrator resolves disputes under a procedural framework with its own body of law and its own narrow grounds for challenge.

Three limits are worth building in deliberately. Confine the mandate to the items listed in the objection notice that remain unresolved — not "all disputes arising under this agreement." Require the neutral to select a value within the range of the two parties' positions on each item, which removes the incentive to take extreme positions. And state expressly that claims for breach of a representation are not accounting items, so a buyer cannot recharacterize an indemnity claim as a true-up entry.

That last point has teeth. Delaware's Supreme Court, in a 2017 decision involving a purchase price adjustment, read a narrowly drafted true-up provision as not permitting the buyer to use the adjustment mechanism to challenge the target's historical accounting practices, where the agreement had allocated that subject elsewhere. The lesson is not that true-ups are always narrow — it is that the clause is read as written, and a buyer who wants the true-up to reach accounting-policy questions has to say so. As always, the reach of these decisions is a question of the governing law the parties selected. Many acquisition agreements select Delaware, and many targets are entities formed under the Delaware General Corporation Law, which is why that body of law dominates the discussion.

Verify before relying: expert determination clauses, the finality they carry, and the standard for challenging them differ across states. Confirm the position under the law actually chosen by the agreement rather than the law of the target's home state.

How the true-up interacts with the rest of the deal

The adjustment does not sit alone. It overlaps with the representation package, the indemnity architecture, and any deferred consideration, and the overlaps have to be resolved on paper.

• Double recovery. The same shortfall — an uncollectible receivable, an unrecorded liability — is claimed both as a true-up item and as a breach of a financial statement representation. Control: an express anti-double-counting provision naming the true-up as the exclusive route for items reflected in the closing statement.
• Basket erosion. Items pushed into the indemnity track have to clear a basket and cap, while true-up items are paid dollar for dollar. Control: decide deliberately which channel each category of exposure runs through.
• Materiality mismatch. A materiality qualifier narrows a representation but does nothing to an arithmetic threshold. Control: do not assume qualifiers soften the adjustment; they operate on different clauses.
• Earnout interference. Working capital decisions taken after closing can move the metric that drives an earnout. Control: align the definitions and accounting hierarchy across both mechanics.
• Escrow undersizing. A downward adjustment larger than the escrow leaves the buyer chasing the seller's owners after distribution. Control: size the escrow to a realistic downside and add a setoff right against other deferred amounts.
• Access denied. The buyer controls the books after closing and can slow-walk the seller's review. Control: specific access obligations with named categories — trial balances, work papers, sub-ledgers — and personnel availability.

For comparison points on how the market drafts these clauses, acquisition agreements filed as exhibits with the Securities and Exchange Commission are a genuinely useful and free resource. Where the assets include inventory, goods, or secured receivables, the commercial-law overlay is set by state adoptions of the Uniform Commercial Code, which affects how some of those balance-sheet items are characterized.

Questions the desk gets

Should the seller or the buyer prepare the closing statement?

Whoever prepares it holds a real advantage, because the other side must object within a short window and bears the burden of identifying every disputed item. Buyer preparation is the market default in most private deals, since the buyer controls the books after closing. Sellers who cannot move that point should negotiate hard on access rights, a longer objection period, and a detailed sample calculation instead.

Is a working capital adjustment necessary at all?

Not always. Locked-box pricing, common in some markets, fixes the price by reference to a pre-signing balance sheet, with the seller giving covenants against leakage between that date and closing. It removes the post-closing true-up entirely and moves the economic risk of the interim period to the buyer. It works best when the buyer has had thorough access to reliable historical accounts and the interim period is short.

Can the seller object to items it did not raise in the notice?

Usually not. Most clauses deem unlisted items accepted and confine the neutral's mandate to items actually raised. That is why the objection notice should be drafted defensively — listing every item under genuine review with a stated proposed value — rather than as a short letter reserving rights. Reservations of rights do not preserve items the clause requires to be identified.

What if the dispute is really about whether the seller lied?

Then it probably does not belong with the neutral accountant. Claims that the financial statements misrepresented the business, or that the seller concealed a liability, are breach claims running through the representation and indemnity provisions, and from there to arbitration or court depending on the dispute clause. The choice between those forums is covered in our brief on arbitration versus court.

Who pays the neutral accountant?

Commonly the fees are split in proportion to how the disputed amounts are resolved, so the party whose positions are largely rejected bears most of the cost. That allocation is worth negotiating rather than accepting from a form, because a simple 50-50 split removes the deterrent against advancing weak items. Cap the fee exposure if the total disputed amount is small relative to the likely cost.

Sequencing the work

Before signing, do three things. Build the peg and the sample calculation from the same data set, so the target and the closing statement speak the same language. Write the accounting hierarchy with an express statement of which level controls. And define the neutral's mandate by listing the categories referred to it, then say expressly what is excluded.

At closing, calendar every date in the mechanism — statement delivery, review period, objection deadline, negotiation window, referral date — and assign an owner to each. True-up rights are lost to calendars far more often than to arguments.

After closing, treat the review as a real exercise. Request the trial balance, the supporting sub-ledgers, and the work papers behind each reserve, and compare the treatment of each line against the sample calculation rather than against instinct. Where the diligence findings that drove the reps are relevant, coordinate with the framework in representations and warranties in an asset purchase and with any deferred consideration mechanics in earnout provisions in business sales. Buyers should also confirm which liabilities followed the assets at all, using the analysis in successor liability in asset deals, and confirm that the authority record supports the deal as described in board minutes and written consents.

General guidance on buying an existing business is published by the Small Business Administration, and background on how civil disputes proceed if a true-up escalates is available from the federal courts. More transaction material sits on the Corporate Operations & Risk desk. This brief is general information from an independent legal publisher, not legal advice, and it does not evaluate any specific agreement or closing statement.