Purchase Price Adjustments in Private Company Acquisitions

By Hank FasthoffJuly 6, 2026

A buyer and seller may agree on a headline price in the letter of intent (LOI), but that number often assumes a stated amount of working capital, no seller debt, an agreed treatment of cash, and payment of the seller's transaction expenses. The purchase agreement converts those assumptions into the amount paid at closing and any adjustment after closing.

The formula deserves attention before either party argues over individual definitions. A typical equity purchase starts with a base purchase price, subtracts closing indebtedness and unpaid seller transaction expenses, adds closing cash, and adjusts for the difference between closing working capital and an agreed target. An asset purchase may use a narrower working capital adjustment and leave cash and debt with the seller. Your transaction structure and negotiated formula determine which components apply.

Each component must use the same measurement time, accounting rules, and group of entities and assets included in the transaction. A carefully drafted formula can produce the wrong answer when one definition measures an amount before closing, another measures it after giving effect to closing payments, or a liability appears in both debt and working capital.

Build the Purchase Price Formula

Suppose the parties agree on a $5 million base purchase price for an equity acquisition. At closing, the target has $500,000 of indebtedness, $200,000 of cash, working capital $100,000 below the target, and $75,000 of unpaid seller transaction expenses. Under a dollar-for-dollar adjustment, the closing equity proceeds would equal $4,525,000.

That example works only after the agreement defines each input. A bank balance may qualify as cash, restricted cash, or an amount unavailable for distribution. A finance lease may qualify as indebtedness, while an ordinary operating lease may remain in working capital or outside the formula. Accrued bonuses may qualify as debt, transaction expenses, current liabilities, or none of those categories depending on who earned them, why they became payable, and whether the working capital target already accounts for them.

You should attach an illustrative calculation to the purchase agreement. The exhibit should use the negotiated definitions, sample balance sheet accounts, and the agreed formula. It should also show how the parties will treat zero balances, negative numbers, disputed classifications, and items omitted from the target calculation.

Define Working Capital for the Transaction

Net working capital often begins with current assets minus current liabilities, excluding cash, indebtedness, transaction expenses, income taxes, and other items addressed elsewhere in the purchase price formula. That description provides a starting point. The operative definition must identify the included and excluded accounts for the target business.

A working capital adjustment protects the economic assumptions behind the price. The buyer expects to receive enough operating assets to support the business without funding a shortfall created before closing. The seller expects credit when the business delivers more working capital than the agreed level. Those expectations require a target and a closing calculation prepared on the same basis.

You should review accounts receivable aging, inventory reserves, customer deposits, deferred revenue, prepaid expenses, accounts payable, accrued compensation, sales taxes, contract liabilities, and intercompany balances. A balance sheet label rarely resolves the treatment. The parties should decide whether the amount belongs in working capital, debt, transaction expenses, or an excluded category.

Deferred revenue requires particular attention. Cash received before closing may have benefited the seller, while the buyer must provide the goods or services after closing. Depending on the business and pricing model, the parties may include the full liability in working capital, apply a cost-to-fulfill approach, place the item outside working capital, or negotiate another treatment. The definition and target should use the same approach.

Set the Working Capital Target

The working capital target represents the level of working capital included in the parties' price. A trailing average of monthly balances may provide useful evidence, but no single averaging period fits every business. Seasonality, growth, acquisitions, customer losses, unusual payment timing, accounting changes, and nonrecurring balances can distort an average.

You should calculate the target from account-level data and test it against the expected closing date. A seasonal business may require a comparison to the same months in prior years. A rapidly growing company may require more working capital at closing than its historical average. A declining company may show the opposite result. The target should reflect the operating business the buyer priced, not a convenient average selected after the headline price was agreed.

The purchase agreement should state whether the target is a fixed number, a formula, or a schedule calculated under stated assumptions. You should resolve the target before signing when possible. Leaving it for the diligence period or a subsequent agreement allows either party to renegotiate the price through the target.

Write an Accounting Rules Hierarchy

Terms such as GAAP and consistent with past practice can point in different directions. Historical practices may depart from generally accepted accounting principles, while GAAP may permit more than one treatment. Your agreement should establish which rule controls when the standards conflict.

A useful hierarchy may place transaction-specific policies first, the sample calculation second, consistent historical practices third, and GAAP last. Another transaction may require GAAP first, followed by consistent application of identified policies. The right order depends on the financial information used to negotiate the price and the changes the parties intend the true-up to measure.

In Chicago Bridge & Iron Company N.V. v. Westinghouse Electric Company, 166 A.3d 912 (Del. 2017), the Delaware Supreme Court confined the purchase price true-up to changes in facts or circumstances between signing and closing under the accounting approach incorporated into the agreement. The buyer couldn't use the true-up to challenge historical accounting practices as noncompliant with GAAP when that theory belonged to the agreement's representations and warranties framework. Chicago Bridge shows why the accounting hierarchy and the boundary between a price adjustment and a representation and warranty claim must appear in the contract.

You should also prohibit changes based solely on purchase accounting, post-closing decisions, new reserves established because of the acquisition, or events after the measurement time. A buyer preparing the closing statement should apply the agreed rules to the target as it existed at the specified time, rather than recast the balance sheet through its preferred post-closing policies.

Define Indebtedness and Cash

Indebtedness usually includes borrowed money, accrued interest, reimbursement obligations, finance leases, seller notes, and guaranties of another person's debt. Negotiated definitions may also include deferred purchase price obligations, unpaid income taxes, deferred compensation, declared distributions, change of control payments, or other debt-like liabilities.

You should identify every included category instead of relying on a general reference to debt-like items. Some obligations resemble debt economically but belong in working capital under the target methodology. Others may be assumed by the buyer but reduce the purchase price because they relate to value extracted or expenses incurred before closing.

Cash requires the same precision. The definition should address bank balances, cash equivalents, money market funds, deposits in transit, outstanding checks, restricted cash, security deposits, customer funds, cash subject to transfer limits, and cash held by entities outside the transaction. The agreement should also state whether cash receives credit before or after closing payments and debt payoffs.

An asset purchase often excludes the seller's cash and indebtedness from the transferred assets and assumed liabilities. An equity purchase transfers ownership of the entity with those balances inside it, so the formula commonly adds qualifying cash and subtracts indebtedness. The asset purchase versus equity purchase structure should match the price mechanics.

Define Transaction Expenses

Seller transaction expenses may include legal, accounting, investment banking, broker, and data-room fees, along with sale bonuses, change of control payments, payroll taxes attributable to those payments, and expenses owed to owner affiliates. The agreement should identify whose expenses qualify, when an expense must be incurred, and whether payment at or after closing affects the calculation.

You should coordinate transaction expenses with indebtedness, working capital, and the closing funds flow. If the buyer pays an expense from the closing proceeds, the formula should prevent a second deduction. If the target pays the expense before the measurement time, the working capital calculation and target should prevent another reduction. An amount should affect the price once.

Invoices may arrive after closing. The purchase agreement should address unbilled fees, success fees calculated from the closing payment, payroll taxes assessed after payment, and expenses disputed by the seller. You should also require the seller to provide payoff information and authorize payment to the service providers from closing proceeds when the buyer needs a clean target balance sheet.

Estimate the Closing Payment

Parties often use an estimated closing statement because final account balances aren't available on the closing date. Shortly before closing, the seller may deliver a good faith estimate supported by trial balances, bank records, payoff letters, invoices, and an account-level calculation. The buyer then receives a defined period to review and comment without delaying closing unless the agreement provides otherwise.

Your agreement should identify who prepares the estimate, when it's due, which records must support it, and how the parties handle a disagreement before closing. You should also state whether the estimate controls the initial payment subject to the post-closing true-up or whether a disputed amount goes into escrow.

The funds flow should reconcile to the estimated statement. It should show payments to sellers, lenders, service providers, escrow agents, optionholders, taxing authorities, and any other recipient. Every payment should correspond to a line in the purchase price formula or a separately identified use of funds.

Calculate the Final Adjustment

After closing, the party designated in the agreement prepares a closing statement using the agreed measurement time and accounting rules. Buyer preparation is common because the buyer controls the target's books after an equity acquisition, but the agreement can allocate that responsibility differently.

You should select deadlines that fit the target's reporting cycle and the complexity of the calculation. The agreement should provide access to relevant books, records, work papers, and personnel during preparation and review. It should also preserve records and require cooperation from former owners or employees who possess information needed to complete the calculation.

A notice of disagreement should identify each disputed item, the amount in dispute, the proposed alternative, and the contractual basis for the objection. Undisputed items should become final. If silence results in deemed acceptance, the review period and access rights must give the reviewing party a fair opportunity to test the statement.

The final payment provision should identify who pays, the payment deadline, the source of recovery, and whether interest accrues. A buyer may recover from a dedicated adjustment escrow, the seller representative, or the sellers directly. The agreement should address several liability among sellers, distribution of excess escrow, setoff rights, and the consequences of a payment default.

Limit the Accountant's Authority

An independent accountant should receive a defined assignment. The purchase agreement should identify the disputed items the accountant may decide, the materials each party may submit, whether the accountant may request additional information, the accounting rules it must apply, and the deadline for a written determination.

In Penton Business Media Holdings, LLC v. Informa PLC, 252 A.3d 445 (Del. Ch. 2018), the Court of Chancery treated the accounting firm as an expert rather than an arbitrator because the agreement designated the firm as an expert and delegated a narrow dispute within its expertise. That distinction affected who interpreted the contract and what information the accountant could consider. Your agreement should state whether the accountant acts as an expert or arbitrator and should define its authority accordingly.

Many agreements limit the accountant to the unresolved items and prevent it from selecting a number outside the range of the parties' submitted positions. They may also allocate the accountant's fees according to each party's relative success. Those provisions require a formula precise enough to apply when several items move in different directions.

The true-up procedure should address accounting disputes rather than every disagreement connected to the transaction. Contract interpretation, fraud, breach of a representation, and compliance with operating covenants may belong in court or another agreed forum. Chicago Bridge and Penton both show that the forum depends on the authority the parties granted in the purchase agreement.

Consider Collars and One-Way Adjustments

The parties may negotiate a collar under which no payment occurs while the adjustment falls within a specified range. A deductible collar applies only the amount outside the range. A tipping collar applies the full adjustment once the threshold is exceeded. The agreement should state which result applies.

Some transactions use a one-way working capital adjustment. A shortfall reduces the price, while an excess produces no increase. Other transactions cap the adjustment or exclude specified accounts from upward credit. Those structures change the economic bargain and should appear in the LOI or purchase agreement before the parties set the target.

You should distinguish a collar from an indemnification basket. A collar limits the purchase price calculation. An indemnification basket limits recovery for specified breaches. Combining the concepts without precise language can create a dispute over whether the same loss receives treatment under both provisions.

Locked Box Transactions

A locked box fixes equity value by reference to a historical balance sheet rather than a closing statement. The buyer receives the economic benefit and risk of the business from the locked box date, while the seller agrees that value won't leave the business between that date and closing except through permitted leakage.

Your agreement should define leakage, permitted leakage, the locked box accounts, seller warranties concerning the accounts, and the remedy for prohibited payments. Dividends, owner fees, related party payments, asset transfers, debt releases, and transaction bonuses may require specific treatment. The parties may also negotiate an interest or value-accrual amount for the period between the locked box date and closing.

A locked box trades the post-closing true-up for greater reliance on historical accounts and pre-closing covenants. It fits a business with reliable financial reporting and a manageable period between the locked box date and closing. The buyer should complete financial diligence before accepting the historical balance sheet as the price reference.

Coordinate Tax Reporting

A post-closing increase or decrease in consideration can affect tax reporting and purchase price allocation. In an applicable asset acquisition governed by Section 1060, Treasury Regulation Section 1.1060-1 requires the seller and purchaser to report subsequent adjustments to consideration. If the adjustment occurs after the tax year of the acquisition, each party generally files a supplemental Form 8594 for the year in which the adjustment is taken into account.

You should coordinate the adjustment formula with the tax allocation provisions. The agreement should require consistent reporting, information exchange, notice of supplemental filings, and cooperation if a price adjustment changes the amount allocated among asset classes. Equity acquisitions and transactions involving tax elections require separate analysis under the rules that apply to their structure.

Negotiate the Definitions Together

If you're the buyer, you should test the price formula against the target's account-level financial data before signing. You should identify debt-like liabilities, cash restrictions, deferred revenue, unpaid transaction expenses, and accounting practices that could change the closing calculation. Your proposed target should match the operating assets required after closing.

If you're the seller, you should calculate the expected closing proceeds under the buyer's definitions and challenge any item that receives duplicate treatment. You should preserve access to the books after closing, require a detailed closing statement, define the accountant's authority, and secure a practical payment process for any upward adjustment.

Both parties should negotiate the formula, definitions, accounting hierarchy, sample calculation, deadlines, access rights, objection procedure, and dispute forum as one system. The final purchase price will come from that system, not from the headline number standing alone.