The net working capital peg is the agreed target level of working capital a seller must leave in a business at closing so it can operate normally on day one. If actual working capital at closing lands above the peg, the buyer pays more; if it lands below, the buyer pays less. The adjustment is dollar-for-dollar, so a $400,000 shortfall against the peg reduces the purchase price by exactly $400,000. The peg is usually set from a trailing-twelve-month average of the target’s monthly working capital, estimated at closing, and then confirmed through a post-closing true-up. Understanding this mechanism is essential because it can shift real dollars long after the headline price is set.
Most middle-market deals price the business on a “cash-free, debt-free” basis, meaning the seller keeps the cash and pays off the debt at closing. In exchange, the seller is expected to deliver a normal amount of working capital to keep operations running. The peg is how the parties define “normal.” This article explains how the peg is calculated, what belongs in the working capital definition, how the closing estimate and true-up work, and how each step touches the price.
What the Net Working Capital Peg Is and Why It Exists
Net working capital (NWC) in a deal context is generally current operating assets minus current operating liabilities. On the asset side, that typically means accounts receivable, inventory, and prepaid expenses. On the liability side, it typically means accounts payable, accrued expenses, and other short-term operating obligations. The precise line items are always spelled out in the purchase agreement, because the deal definition often differs from the textbook accounting definition.
The peg exists to protect the buyer from receiving a business that has been stripped of the resources it needs to function. Without a peg, a seller could accelerate collections, delay paying vendors, and run down inventory right before closing, handing the buyer a company that looks fine on paper but cannot fund normal operations. The peg neutralizes that incentive by fixing a target level and adjusting the price for any deviation from it.
For the buyer, the working capital delivered at closing is essentially part of what was paid for. A business valued on its earning power needs a baseline of receivables and inventory to generate those earnings. The peg ensures that baseline is present and that the buyer is not forced to inject fresh cash immediately after taking ownership. A working capital adjustment mechanism is now standard in the large majority of private-company acquisitions: SRS Acquiom’s Working Capital Purchase Price Adjustment Study reports the provision in more than 90 percent of private-target deals, and BDO explains why the mechanism matters to both sides.
How the Peg Is Typically Set
The most common approach is to base the peg on a trailing-twelve-month (TTM) average of the target’s monthly net working capital. Analysts pull the working capital balance at each of the last twelve month-ends, then average them. Twelve months smooths out seasonality, which matters for businesses whose receivables and inventory swing across the year. Some deals use a shorter window, such as a trailing six months, when the business is growing quickly and older data no longer reflects normal operations.
The raw average is rarely used without adjustment. Advisors normalize the figure to remove one-time distortions and items that do not belong in ongoing operations. Common normalizations include:
- Removing non-recurring receivables or payables tied to unusual events
- Excluding balances that will not transfer to the buyer under the deal terms
- Adjusting for known seasonality if the closing date falls at a high or low point in the cycle
- Correcting stale or uncollectible receivables and obsolete inventory
This is one reason a quality of earnings analysis before a sale matters so much. The same diligence work that scrubs earnings also builds the working capital picture that supports the peg. When both sides trust the underlying monthly data, negotiating the peg is far smoother.
Here is a simplified hypothetical. Suppose a distributor’s month-end net working capital over the past year averages $2.1 million, but two of those months were inflated by a large one-time receivable that has since been collected and will not recur. After removing that item, the normalized TTM average settles at $1.9 million. The parties agree on a peg of $1.9 million. That number now becomes the benchmark against which closing working capital is measured.
What Is Included and Excluded From the NWC Definition
The working capital definition in the purchase agreement is negotiated line by line, and small wording choices can move real money. As a general rule, the definition captures operating current assets and operating current liabilities while excluding anything already handled elsewhere in the deal.
Cash is almost always excluded, because deals are structured cash-free, debt-free and cash is swept by the seller at closing. Interest-bearing debt and debt-like items are also excluded from working capital, since debt is settled separately at closing. Items that are frequently debated as “debt-like” rather than working capital include deferred revenue, customer deposits, accrued bonuses, unpaid taxes, and earned-but-unused vacation. Where these land can materially change the calculation.
A typical NWC definition might include and exclude the following:
- Included assets: accounts receivable, inventory, prepaid expenses, other operating current assets
- Included liabilities: accounts payable, accrued operating expenses, other short-term operating liabilities
- Excluded: cash and cash equivalents, interest-bearing debt, deferred taxes, and any item classified as debt-like or as a separate purchase-price adjustment
The definition also specifies the accounting standard. Agreements commonly require that working capital be calculated in accordance with generally accepted accounting principles (GAAP) applied consistently with the target’s historical practices. When GAAP and historical practice conflict, the agreement states which controls. The American Institute of CPAs offers guidance on accounting and financial reporting under GAAP, which underpins how these calculations are performed and disputed. Whether the deal is structured as a stock or asset purchase can also affect which balances transfer and therefore what belongs in the definition.
The Closing-Date Estimate and the Post-Closing True-Up
Working capital cannot be measured precisely on the closing date because the books are not yet closed for the final period. To bridge that gap, the seller delivers an estimated closing statement shortly before or at closing, showing its good-faith estimate of net working capital as of the closing date. The purchase price paid at closing is adjusted up or down based on how that estimate compares to the peg.
After closing, the buyer prepares an actual closing statement using finalized numbers. This is the true-up. The buyer is typically required to deliver its post-closing statement within a defined window, commonly 90 to 120 days after closing, which allows time to close the books and finish the accounting. The seller then reviews the statement and has a limited period, often 30 to 60 days, to accept it or deliver a written objection.
If the parties cannot agree on disputed items, the agreement almost always sends the dispute to an independent accounting firm whose determination is binding on both sides. This mechanism keeps working capital fights out of court and gives both parties a neutral referee. Careful drafting of the definition, the accounting policies, and a sample calculation attached as a schedule sharply reduces the odds of a dispute reaching that stage.
Consider the timeline in practice. A deal closes on June 30 with an estimated closing NWC of $1.95 million against a $1.9 million peg, so the buyer pays $50,000 more at closing. Ninety days later the buyer’s finalized statement shows actual closing NWC was really $1.85 million. Because the actual figure is $50,000 below the peg rather than above it, the seller must return the $50,000 overpayment plus the additional $50,000 shortfall, for a total true-up payment of $100,000 back to the buyer.
How the Peg Affects the Purchase Price
The core rule is simple: the purchase price moves dollar-for-dollar with the difference between actual closing working capital and the peg. Deliver more working capital than the peg and the seller collects the excess; deliver less and the seller funds the gap. There is no rounding and, in most deals, no threshold or collar unless the parties specifically negotiate one.
Walk through two clean scenarios against a $1.9 million peg. If actual closing NWC is $2.05 million, working capital came in $150,000 above the peg, so the purchase price rises by $150,000 in the seller’s favor. If actual closing NWC is $1.7 million, working capital came in $200,000 below the peg, so the purchase price falls by $200,000 and the seller pays the buyer that amount. The base enterprise value never changes; only the working capital adjustment moves.
This is why sellers should manage working capital deliberately in the months before closing rather than draining it. Aggressively collecting receivables and stretching payables to pull cash out of the business simply lowers closing working capital and triggers an offsetting price reduction. The peg turns those maneuvers into a wash at best. Sophisticated buyers and their advisors will catch the pattern in diligence.
Because the peg can swing hundreds of thousands of dollars, it deserves attention early in the process, not as an afterthought in final documents. Engaging experienced transaction advisory support before signing helps sellers set a defensible peg, structure a fair working capital definition, and avoid surprises at the true-up. The peg is one of the few deal terms that keeps affecting the price after the ink is dry.
Frequently Asked Questions
What is the difference between the working capital peg and the working capital adjustment?
The peg is the fixed target level of net working capital agreed in the purchase agreement. The adjustment is the dollar amount by which the purchase price changes based on how actual closing working capital compares to that peg. The peg is the benchmark; the adjustment is the result of measuring against it.
Why is cash excluded from net working capital in a deal?
Most acquisitions are structured on a cash-free, debt-free basis, meaning the seller keeps the cash on hand and pays off the debt at closing. Because cash is handled separately, including it in working capital would double-count it. The peg focuses on operating items like receivables, inventory, and payables that the business genuinely needs to run.
How long after closing does the working capital true-up happen?
The buyer typically delivers its post-closing statement within 90 to 120 days after closing, once the books are finalized. The seller then has a review period, often 30 to 60 days, to accept the statement or object. If a dispute remains, it usually goes to an independent accounting firm for a binding determination.
What happens if actual working capital is higher than the peg?
If actual closing working capital exceeds the peg, the seller delivered more than the target amount, so the purchase price increases dollar-for-dollar by the excess. The buyer effectively pays the seller for the additional receivables and inventory left in the business.
Can a seller game the peg by collecting receivables early before closing?
Not effectively. Accelerating collections or delaying vendor payments to pull cash out reduces closing working capital, which triggers an equal reduction in the purchase price under the peg mechanism. The adjustment offsets the maneuver, and diligence teams are trained to spot these patterns.
Who calculates the peg and the closing working capital?
The peg is negotiated by both parties, usually with financial advisors on each side working from the target’s historical monthly data. The seller prepares the estimated closing statement, and the buyer prepares the actual post-closing statement for the true-up. Independent transaction advisors are commonly engaged to build and defend these figures.
