The Check That Arrives After Closing
The wire hits the account. The purchase agreement is signed. The attorneys shake hands, the advisors send their invoices, and the seller begins mentally allocating the proceeds. For many first-time sellers, that moment feels like the finish line. It is not. In a meaningful percentage of middle-market transactions, the final economics of a sale are not settled at closing. They are settled weeks or months later, after a buyer has had time to examine the business’s balance sheet in detail, run calculations against a contractually agreed target, and send the seller a document that is either a final payment or, more uncomfortably, a demand.
That document is the product of a working capital adjustment, and it is one of the least understood mechanisms in M&A for sellers who have never been through a transaction before. The concept is straightforward in theory: the deal was priced assuming the business would be delivered with a certain level of working capital in place, and if the actual balance sheet at closing came in below that level, the seller owes the buyer the difference. In practice, the calculation is rarely straightforward, the numbers are rarely what the seller expected, and the adjustment often runs in the buyer’s favor.
The sums involved are not trivial. In a transaction valued at $10 million, a working capital shortfall of two to three percent of enterprise value, a figure that would be easy to dismiss as accounting noise during negotiations, translates to $200,000 to $300,000 coming out of the seller’s pocket after closing. At $30 million, the same percentage shortfall becomes a seven-figure settlement. Sellers who spent months focused on EBITDA multiples and headline price routinely find themselves blindsided by a post-close adjustment that meaningfully erodes their net proceeds, often at a point when they have already spent or committed portions of what they believed was a certain number.
The core tension in any working capital adjustment in M&A is informational. A buyer, typically backed by an experienced finance team conducting a formal quality-of-earnings analysis, has spent 60 to 90 days scrutinizing the business before and after closing. The seller, often running the business without a dedicated CFO and relying on year-end accounting practices that have never been tested against institutional GAAP standards, is responding to that scrutiny without equivalent resources or preparation. That asymmetry is where surprises are born. Understanding how the mechanism works, before signing a letter of intent, is one of the highest-leverage things a seller can do to protect what they have built. For context on how balance sheet composition affects your actual take-home proceeds well before a transaction begins, this resource on net worth trapped in your business is worth reviewing early in your thinking.
What Working Capital Actually Means in an M&A Context
Most business owners know the accounting definition of working capital: current assets minus current liabilities. It appears on every balance sheet, it is referenced in every introductory finance course, and it seems, on its surface, to be a straightforward number. In an M&A context, however, the accounting definition is almost beside the point. What matters is the deal-specific definition of working capital, which is negotiated between buyer and seller, written into the purchase agreement, and often structured in ways that diverge meaningfully from what appears on the company’s historical financial statements.
The distinction matters because no two purchase agreements define working capital the same way. A buyer’s counsel will propose a definition that includes certain current asset and liability categories and excludes others, and those inclusion and exclusion decisions can shift the calculated working capital figure by hundreds of thousands of dollars before the ink is even dry. Cash, for instance, is almost universally excluded from the working capital calculation in a deal context, because purchase price is typically structured on a cash-free, debt-free basis. But beyond that standard carve-out, the treatment of items such as deferred revenue, accrued bonuses, customer deposits, income tax receivables, intercompany balances, and certain prepaid expenses is contested territory. A seller who signs off on a working capital definition without fully modeling its implications is agreeing to a measurement standard they may not fully understand.
The second layer of complexity in a working capital adjustment M&A context is the concept of the target peg, sometimes called the normalized working capital target. Rather than simply comparing the actual working capital at closing against zero, the purchase agreement establishes a specific dollar target, and the adjustment is calculated as the difference between actual closing working capital and that target. If closing working capital is below the peg, the seller pays the difference to the buyer. If it is above the peg, the buyer pays the surplus to the seller. The direction of adjustment is determined entirely by where the target is set.
That target is typically derived from a trailing average of the business’s historical working capital, most commonly a 12-month or LTM trailing calculation that is intended to reflect the normalized capital requirements of the business as a going concern. The logic is defensible: a buyer is purchasing a business with the expectation that it will arrive funded at its normal operational level, and the peg is designed to ensure neither party benefits from an artificial manipulation of the balance sheet in the weeks leading up to closing. In practice, however, the calculation of that trailing average is itself a negotiation, and one in which sellers who lack dedicated financial advisory support frequently concede ground without recognizing it.
Understanding how your balance sheet is actually composed, and how specific line items will be classified under a buyer’s proposed working capital definition, is foundational work that should happen well before a letter of intent is signed. The composition of your current assets and liabilities is not just an accounting matter; it directly determines your net proceeds. Sellers who have spent time assessing how much net worth is trapped in their business are better positioned to enter these negotiations with clear expectations about what the balance sheet will show and how a buyer is likely to frame it.
How the True-Up Mechanism Works: From Estimated Close to Final Settlement
Most sellers experience the working capital adjustment as a single event that arrives unexpectedly after closing. In reality, it is a structured, multi-stage process with contractually defined timelines, response obligations, and escalation procedures. Understanding that process in advance is not a technical exercise for lawyers and accountants alone; it is a practical prerequisite for any seller who wants to protect their net proceeds and respond effectively when a buyer’s calculation arrives.
The process begins at closing itself. Because the final balance sheet cannot be audited and reconciled instantaneously on the day of signing, purchase agreements universally rely on an estimated closing statement prepared in advance of close, most often by the seller. That document reflects the best available estimate of the business’s working capital as of the closing date, and it is used to set the initial wire transfer. If the estimate shows working capital equal to the target peg, the seller receives the agreed headline purchase price in full. If the estimate shows a shortfall, the initial proceeds are reduced by that gap. If it shows a surplus, the buyer pays an increment above headline price. The estimated statement is, in every sense, a preliminary number, and both parties understand at signing that a reconciliation will follow.
The timeline for that reconciliation is typically specified in the purchase agreement with considerable precision. Buyers are usually granted 60 to 90 days following the closing date to prepare and deliver a final closing statement, which represents their own formal calculation of actual working capital as of the closing date. This is not a casual exercise. A buyer’s finance team and their external accountants will work through the closing balance sheet line by line, applying the working capital definition agreed in the purchase agreement and the GAAP consistency standards required by the same document. In the context of a working capital adjustment M&A transaction, this period is when the informational asymmetry between an experienced buyer and an often under-resourced seller becomes most consequential.
Once the buyer delivers the final closing statement, the seller is granted a defined response window, commonly 30 to 45 days, to review the calculation and either accept it or submit a formal written objection. This response window is more demanding than it appears. The seller must not only understand the buyer’s methodology but must identify, document, and articulate specific line-item disagreements with sufficient precision to hold up in a formal dispute process. Sellers who lack in-house financial staff or who have not maintained clean, audit-ready accounting records frequently struggle to mount an effective response within the contractual deadline, which in many agreements means the buyer’s figures are deemed accepted by default if no timely objection is filed.
When the parties cannot reach agreement through direct negotiation following the seller’s objection, the purchase agreement typically requires the disputed amounts to be submitted to an independent accounting firm, often called the Accounting Referee or the Independent Accountant, for binding resolution. This is not arbitration in the traditional legal sense; the referee’s mandate is narrow and accounting-specific, limited to resolving the disputed line items in accordance with the definitions and GAAP standards set out in the purchase agreement. The referee’s determination is usually final and non-appealable on accounting questions, which means a seller who brings weak documentation or inconsistent historical accounting practices into that process is unlikely to prevail.
Escrow accounts serve as the financial mechanism underlying this entire timeline. Rather than leaving the adjustment unsecured, purchase agreements typically require a portion of the purchase price, commonly one to two percent of transaction value but sometimes larger, to be held in escrow at closing and released only after the working capital true-up is resolved. This holdback ensures the buyer has a funded remedy if the final calculation produces a downward adjustment that the seller would otherwise resist paying from outside proceeds. In some transactions, working capital escrow is structured alongside a broader indemnification escrow that covers post-close claims, and the interaction between the two accounts can complicate settlement timing considerably.
Sellers who have invested in exit preparation conversations before going to market tend to navigate this process with significantly more confidence. When your accounting records are clean, your accruals are properly stated, and your advisors understand the specific working capital definition in your purchase agreement, responding to a buyer’s final closing statement becomes a manageable task rather than an emergency. The sellers most exposed to post-close losses are those who treat the closing wire as the end of the transaction rather than the beginning of its final chapter.
The Most Common Sources of Post-Close Surprise
Not every working capital adjustment M&A dispute traces back to bad faith or aggressive buyer tactics. Many of the most costly post-close shortfalls originate in balance sheet items that the seller’s own accounting team understated, misclassified, or simply never scrutinized with institutional rigor. The gap between how a privately held business records its financials for tax and operational purposes and how a buyer’s finance team reads those same financials under a formal GAAP lens is often wider than sellers anticipate, and that gap has a dollar value that appears in the final closing statement.
Accrued liabilities represent the most consistently problematic category. Growing businesses frequently understate accruals, not through intentional misrepresentation but because accrual accounting requires estimates, and internal teams under operational pressure tend to err toward conservative recognition. Common understatements include accrued vacation and paid time off balances that were never fully reconciled to payroll records, accrued warranty obligations on products sold in prior periods, bonuses that were discussed but not formally booked, and accrued professional fees for services rendered but not yet invoiced. A buyer’s due diligence team will reconstruct each of these line items from source documentation, and the result frequently shows a higher liability balance than the seller carried on the pre-close balance sheet. Each dollar of additional accrued liability reduces working capital by a dollar, directly translating into a downward adjustment to the seller’s proceeds.
Deferred revenue is another frequent source of dispute, particularly in businesses that sell subscriptions, annual service contracts, maintenance agreements, or other arrangements where cash is received before performance is fully delivered. The core question in any working capital adjustment M&A context is whether deferred revenue is treated as a current liability in the working capital calculation or excluded entirely as a non-cash item. Sellers often carry deferred revenue at face value, recognizing it as an asset in the sense that it represents future work already paid for. Buyers view it as an obligation: cash has been collected from customers, but the service still has to be delivered, and delivering it will cost money. Depending on the purchase agreement’s working capital definition, deferred revenue can represent a six- or seven-figure swing in the final settlement, and sellers who did not model this exposure during negotiation routinely absorb the impact at close.
Inventory valuation disputes are particularly sharp in businesses that carry physical goods. Most private companies value inventory using standard cost or weighted average methods that are applied consistently year to year but never subjected to independent verification. When a buyer applies lower-of-cost-or-net-realizable-value testing to the closing inventory, they will write down slow-moving stock, obsolete SKUs, and items with carrying values above current market price. Sellers often push back on these write-downs as overly aggressive, but if the purchase agreement requires GAAP consistency and the buyer’s methodology is technically defensible, the seller’s objection is difficult to sustain in front of an accounting referee. The write-down reduces the current asset balance, compresses working capital, and generates an adjustment in the buyer’s favor.
Accounts receivable collectability is the fourth major category. Sellers typically carry receivables at gross amounts, with either no allowance for doubtful accounts or an allowance calculated loosely based on historical write-off experience. A buyer analyzing the aging schedule in the weeks following close will apply a more rigorous collectability assessment, reserving against receivables that are more than 90 or 120 days outstanding, excluding balances from customers in dispute, and discounting receivables that are concentrated in a single counterparty. The resulting net receivable balance is often lower than what the seller reported, reducing working capital accordingly. The asymmetry is significant: the buyer now owns the business and has direct access to the receivables aging and customer correspondence that the seller’s team managed internally. That access produces findings the seller could not easily challenge without equivalent documentation.
Understanding what the post-close period actually looks like, both operationally and financially, is something most sellers underestimate. This resource on life after selling your business offers a grounded view of what sellers typically encounter once the transaction closes and the true-up process begins in earnest.
Negotiating the Peg: Where Sellers Give Up Leverage Without Realizing It
The working capital target peg is the single most consequential number in a working capital adjustment M&A transaction, and it is set during one of the most time-compressed, psychologically loaded phases of the entire process: the period between a letter of intent and a signed purchase agreement. Sellers who have spent months preparing for a sale, who have run a competitive process, and who have finally received an acceptable headline number from a credible buyer are not, at that moment, inclined to spend political capital arguing about trailing average balance sheet calculations. Buyers know this. Their counsel submits a proposed peg, the seller’s counsel reviews it, and in a significant number of transactions, the number is accepted with minimal scrutiny. That acceptance, often framed internally as closing a routine administrative detail, can cost a seller hundreds of thousands of dollars before the business changes hands.
The mechanism by which a peg is calculated appears straightforward in the purchase agreement: the parties agree on a trailing period, typically the last 12 months, compute the average monthly working capital over that period using the agreed balance sheet definition, and set the result as the target. In practice, the buyer’s proposal involves a series of embedded choices that each carry financial consequences. The selection of the measurement period is the most direct lever. A buyer who proposes a 12-month trailing average that happens to include the three highest-working-capital months of the seller’s fiscal year, while a 15-month trailing average would have averaged those peaks out, is not doing anything technically improper. They are simply selecting the window that produces the highest peg, which is the most favorable outcome for the buyer. The seller who does not run the alternative calculations independently has no basis to push back.
Seasonal businesses are particularly exposed to this dynamic. A landscaping company, a retailer with a holiday concentration, or a manufacturer that builds inventory ahead of a spring selling season will show dramatically different working capital levels in different months. A buyer measuring the peg during the balance sheet’s peak inventory period will establish a target that the business can only match when it is fully stocked heading into its primary season. If closing happens in the off-season, the actual working capital at close will fall below that peak-period peg by construction, and the adjustment flows to the buyer. The seller did not strip assets or manipulate the balance sheet; the calendar did the work.
Beyond period selection, buyers sometimes propose to exclude favorable months from the trailing calculation on the basis that they reflect non-recurring or anomalous conditions, while simultaneously insisting that high-working-capital months represent normalized operations. A month in which a large customer payment arrived early, accelerating cash conversion and temporarily reducing receivables, might be characterized as a timing anomaly to be excluded from the average. A month in which payables were stretched to manage cash flow, reducing current liabilities and inflating working capital, might conversely be included as representative. These characterizations are not always made in bad faith, but their cumulative effect on the calculated peg is directionally consistent: the target moves up, and the seller’s exposure to a post-close shortfall increases.
GAAP consistency requirements add a further layer of complexity that sellers frequently underestimate. Purchase agreements require the closing balance sheet, and therefore the working capital calculation, to be prepared in accordance with GAAP applied on a basis consistent with the company’s historical practices. This sounds protective for the seller. In practice, it gives buyers a contractual basis to recharacterize how certain items were historically recorded if the historical treatment was not technically consistent with GAAP, even if that treatment was applied uniformly for years. Deferred revenue recognized too early, vacation accruals calculated on a non-GAAP basis, or inventory costing methods that deviate from standard practice all become adjustment opportunities for a buyer who is motivated to find them. The GAAP consistency clause is supposed to prevent manipulation; in the hands of an experienced buyer, it can also enable reclassifications that shift the peg unfavorably for the seller.
The countermeasure is preparation, and the window in which preparation actually provides leverage closes earlier than most sellers expect. A seller who enters LOI negotiations having already computed their own trailing working capital analysis, using the same line-item definitions a buyer is likely to propose, can identify and challenge a proposed peg before it is written into the agreement. A seller who begins that analysis after the LOI is signed is working against an already-established anchor number and a ticking exclusivity clock that creates pressure to move to signing rather than reopen economic terms. The sellers who consistently achieve better peg outcomes are not necessarily the most aggressive negotiators; they are the ones who arrive at the table with their own numbers already run. Starting that preparation well before a formal process begins is what creates the analytical foundation to challenge a buyer’s proposed peg with credibility rather than instinct.
There is also a structural dynamic that reinforces peg vulnerability: sellers who feel they need to transact are less likely to push back on any specific deal term, including the peg. A seller under time pressure, whether from a partner dispute, a health issue, or a declining business, will subordinate working capital negotiations to deal certainty. A seller with a strong business who is genuinely indifferent between selling now and continuing to operate carries a fundamentally different leverage profile. The best exits tend to happen when the seller does not need to sell, and nowhere is that dynamic more financially concrete than in working capital adjustment M&A negotiations, where the willingness to walk away from an unfavorable peg is worth real dollars at closing.
How to Prepare Your Balance Sheet Before Going to Market
The most effective time to address working capital adjustment M&A exposure is 12 to 24 months before a letter of intent is signed. By the time a buyer’s term sheet is on the table, the historical balance sheet that will anchor the working capital peg already exists. The trailing average is already calculated. The accruals that were never properly booked are already missing. A seller who waits until LOI to begin thinking about balance sheet quality is not preparing for a working capital adjustment; they are reacting to one. The distinction between those two postures is, in the middle market, often worth several hundred thousand dollars.
Begin with receivables. Pull a full aging report and apply the same collectability standard a buyer’s finance team will use: any balance more than 90 days outstanding should be treated as impaired unless there is documented evidence of active collection or a confirmed payment plan. Receivables that have been rolling for two or three cycles without resolution should be written off before a sale process begins, not because it helps the financial statements aesthetically but because it forces an honest accounting of what the business actually owns. A buyer will find aged balances regardless, apply a reserve, and reduce working capital accordingly. If the seller has already taken that write-off, the closing balance sheet reflects reality and the adjustment is neutralized.
Accrued liabilities require a full reconciliation, ideally led by an outside accountant or financial advisor rather than the internal team that prepared the original figures. Work through each accrual category systematically: unpaid vacation and paid time off balances verified against payroll records, accrued bonuses tied to board-approved compensation plans, accrued warranty reserves benchmarked against actual claims history, and professional fee accruals matched to open invoices and engagement letters. Any category where the internal team is estimating rather than calculating from source data is a category a buyer will challenge. Translating estimates into documented calculations before the due diligence process begins eliminates a significant source of working capital adjustment M&A exposure.
For businesses that carry physical inventory, the pre-sale period is the time to conduct a full physical count and reconcile it to the general ledger. Discrepancies between book inventory and actual inventory are common in businesses that have not been audited, and they surface without fail during a buyer’s due diligence. Beyond the count itself, apply a rigorous lower-of-cost-or-net-realizable-value review to the existing stock. Identify slow-moving SKUs, obsolete items, and units with carrying values that exceed current market pricing. Write down or write off the impaired inventory before closing. The same discipline applies to capitalized costs and prepaid expenses: if amounts on the balance sheet do not represent economic assets that will generate future benefit, they should be removed rather than left for a buyer to challenge.
Working with a quality-of-earnings advisor before going to market, not after receiving an LOI, is perhaps the highest-leverage action a seller can take. A quality-of-earnings analysis does more than assess EBITDA; it examines balance sheet composition, accrual accuracy, revenue recognition consistency, and working capital normalization through the same lens a buyer’s advisor will apply. A seller who has already been through that process internally arrives at the negotiating table knowing exactly where their balance sheet is vulnerable, which line items are likely to generate adjustment claims, and what their defensible working capital position actually is. That knowledge is the foundation of an effective peg negotiation and an effective response to a final closing statement.
Sellers navigating this process are often doing so while simultaneously managing a business that has, in some sense, begun to outpace their capacity to oversee every financial detail personally. That inflection point is itself a signal that outside financial support is warranted, both for operational reasons and for sale readiness. Similarly, sellers who are beginning to think seriously about timing should avoid the trap documented in this piece on founders who sold too late: the balance sheet you present to buyers reflects years of accounting decisions, and the window to clean it up closes faster than most owners realize.
Protecting Net Proceeds: What Sophisticated Sellers Do Differently
Sellers who walk away from a transaction with proceeds close to their original expectations share a common characteristic: they treated the working capital adjustment M&A process as a financial discipline problem, not a legal one. They did not wait for a buyer’s final closing statement to understand their balance sheet. They did not learn what “normalized working capital” meant during LOI negotiations. They built that understanding months or years before a formal process began, and they arrived at the table with documentation, not assumptions.
The practical difference between a prepared seller and an unprepared one is not a matter of sophistication in the abstract. It is a matter of specific, concrete actions taken at specific points in time. A seller who reconciles accrued liabilities against source documentation 18 months before closing does not face an accrual dispute in the true-up. A seller who applies a rigorous collectability standard to accounts receivable before going to market does not receive a buyer’s closing statement showing a $400,000 reserve against balances the seller believed were current. A seller who runs their own trailing working capital analysis before the LOI is signed can push back on a buyer-proposed peg with numbers, not objections. Each of these actions is individually unremarkable. Their cumulative effect on net proceeds is not.
What separates sophisticated sellers is also a recognition that headline purchase price is one variable in a transaction, not the only one. The final economics of a sale are determined by the purchase price, less working capital shortfalls, less indemnification claims drawn from escrow, less the tax consequences of how the transaction is structured, less any seller note or earnest-out that remains contingent on post-close performance. A seller who negotiates an enterprise value of $15 million but absorbs a $600,000 working capital adjustment, a $250,000 indemnification draw, and a tax structure that costs an additional $400,000 relative to an asset sale alternative has effectively closed a $13.75 million deal. The gap between the number announced and the number deposited is where working capital adjustment M&A exposure lives, alongside every other post-close variable the seller did not model before signing.
The advisors a seller retains matter as much as the preparation work itself. An M&A attorney who has seen hundreds of working capital disputes understands which proposed definition clauses create exposure and which protective provisions are worth fighting for. A quality-of-earnings advisor who has sat on the buyer side knows exactly which balance sheet items will be scrutinized and can help a seller pre-empt those findings. A financial advisor who has run competitive sale processes understands how to use buyer interest to preserve negotiating leverage on economic terms, including the peg, rather than surrendering that leverage in pursuit of speed. Assembling that team early, before the business is formally marketed, is one of the highest-return decisions a seller makes.
The window to do this work is finite, and it closes earlier than most owners expect. For sellers thinking seriously about timing, understanding what those exit preparation conversations actually look like is a practical starting point. The sellers who protect their net proceeds are not the ones who reacted best to a buyer’s closing statement. They are the ones who made that closing statement difficult to dispute before the process ever began.
