More than 90% of private-target M&A transactions now carry a purchase price adjustment mechanism, up from roughly 50% a decade ago, according to SRS Acquiom's 2026 Working Capital Purchase Price Adjustment Study. For most sellers, that mechanism turns on one line: the change in net working capital between the day you agree a price and the day you close. Get it right and your proceeds match the headline number. Miss it and a six-figure true-up can pull money back months after you thought the deal was done.
Key Takeaways
- The gap moves your check, not the balance Your sale price adjusts dollar-for-dollar on how actual closing working capital compares to a pre-agreed peg, not on the raw net working capital number.
- Working capital is the most-negotiated deal adjustment It was the purchase price adjustment metric in 89% of private-target deals in the ABA's 2023 study, and PPA mechanisms now appear in more than 90% of deals per SRS Acquiom's 2026 study.
- Direction decides cash flow An increase in net working capital consumes cash and lowers free cash flow, while a decrease frees up cash (Wall Street Prep).
- The true-up lands after you have left Buyers prepared the closing adjustment calculation in 97% of 2023 ABA-studied deals and typically have 60 to 90 days post-closing to deliver it.
What Net Working Capital Measures - and Why M&A Rewrites the Formula
Net working capital is the difference between a company's current assets and current liabilities: the short-term resources a business uses to fund day-to-day operations. The textbook working capital formula is simple, current assets minus current liabilities. A positive net working capital balance means current assets cover current liabilities; a negative one means they do not.
M&A rewrites that definition. Because most middle-market deals are structured cash-free and debt-free, the net working capital formula used in a transaction strips out both cash and interest-bearing debt (SRS Acquiom; Morgan & Westfield). The seller sweeps the cash at close and pays off the debt, so buyers only care about the operating items needed to keep the business running the morning after: receivables to collect, inventory to sell, and payables to settle.
That leaves a narrower figure than the one on your balance sheet. The table below shows what typically stays in and what comes out.
| Balance sheet item | In M&A net working capital? | Why |
|---|---|---|
| Accounts receivable | Yes | Operating current asset the buyer must collect |
| Inventory | Yes | Operating current asset needed to keep selling |
| Prepaid expenses | Yes | Operating current asset |
| Cash and cash equivalents | No | Swept by the seller in a cash-free deal |
| Accounts payable | Yes | Operating current liability |
| Accrued expenses | Yes | Operating current liability |
| Interest-bearing debt | No | Settled at close in a debt-free deal |
Source: SRS Acquiom; Morgan & Westfield
The precise inclusions and exclusions get negotiated line by line and then fixed in the asset purchase agreement. Iconic's advisors work through this definition before a business goes to market, because the exclusions quietly decide who keeps which dollar at close.
Calculating the Change in Working Capital
Once you know the net working capital balance, calculating the change in working capital is a matter of comparing two periods. Wall Street Prep frames the change in NWC as Beginning NWC minus Ending NWC, a convention that makes the cash impact fall out cleanly: when the balance grows year over year, the change is negative and represents a cash outflow; when the balance shrinks, the result is a positive change and a cash inflow.
A quick example. Say operating net working capital starts the year at $1.8 million and ends at $2.1 million. The nwc balance rose by $300,000, which means $300,000 of cash got tied up in receivables and inventory over the year, a cash outflow and a negative change under the Wall Street Prep convention. Reverse the numbers and you free up cash.
Understanding changes in working capital this way matters because the sign, not just the size, is what carries through to cash flow and, ultimately, to how a buyer values the business.
How Working Capital Changes Affect Cash Flow
The reason buyers watch working capital on cash flow so closely is that it sits directly in the free cash flow build. In a discounted cash flow valuation, free cash flow to the firm equals NOPAT plus depreciation and amortization, minus capital expenditures, minus the Change in Net Working Capital (Financial Edge Training). Working capital can affect that number as much as earnings do, so every dollar of working capital growth is a dollar of cash flow the business never reports.
The mechanics are straightforward. An increase in net working capital reduces the cash a business generates, because money sunk into receivables and inventory is money it cannot use; a decrease does the opposite, since collecting faster or stretching payables frees up cash (Wall Street Prep). Net income can look healthy while operating cash flow lags, and working capital changes are usually the reason for the gap.
On the cash flow statement, these swings show up in the operating section, reconciling accrual net income to actual cash generated. For a seller the takeaway is blunt: a business that ties up more cash to grow will report weaker free cash flow, and a buyer's model discounts it accordingly.
What Causes a Change in Working Capital
Three operating levers cause a change in working capital: how fast you collect, how much you hold in inventory, and how long you take to pay. Wall Street Prep captures the interaction with the cash conversion cycle, days inventory outstanding plus days sales outstanding minus days payable outstanding, which measures how many days cash stays tied up before it converts back to cash. Faster collections and leaner inventory shrink working capital; slow-paying customers and stockpiled inventory inflate it.
Growth is the driver owners underestimate. A business scaling revenue usually has to fund more accounts receivable and more inventory before the cash comes back, so working capital rises and the working capital ratio moves with it. Iconic has served more than 200 businesses through a sale, and rapid growth reliably tightens working capital right when an owner wants the cleanest possible numbers in front of buyers.
Negative working capital is not automatically a warning. Corporate Finance Institute notes it is common, and often a sign of efficiency, in large retailers that collect from customers immediately but pay suppliers on long terms, and in subscription businesses that collect cash upfront as deferred revenue before delivering the service. Positive net working capital is the norm for most middle-market companies, but a negative position can be a genuine strength depending on the model.
Setting the Working Capital Peg Before You Sell
The change in working capital only becomes a price adjustment once there is a target to measure against. That target is the working capital peg, and it is usually set as an average of normalized net working capital over the trailing twelve months, with the review period stretched or reweighted when the business is seasonal (Baker Tilly; BDO). The peg exists to protect the cash flow a buyer expects to inherit, so normalizing it means cleaning up one-time items, reclassifying misbooked accounts, and agreeing what counts well before closing.
This is where a quality of earnings report earns its cost. A QoE analysis, which buyers routinely commission to normalize working capital and pressure-test the peg, typically runs between $20,000 and $75,000 depending on firm size and deal complexity (Windes, 2026). The peg is agreed in principle at the letter of intent stage, and the loi meaning in m&a explainer covers what that document actually commits you to, before it gets refined through diligence.
Understanding how central this mechanism is helps. Working capital has been the most common purchase price adjustment metric in nearly every ABA Private Target Deal Points Study since 2007, appearing in 89% of deals in the 2023 study, while purchase price adjustment mechanisms overall now sit in more than 90% of private-target transactions (SRS Acquiom, 2026). This is standard practice, not an edge case.
The Post-Closing True-Up and How It Hits Your Proceeds
At closing, your net working capital rarely lands exactly on the peg, and the difference flows straight into the purchase price. The bridge works like this: enterprise value, plus cash, minus debt, plus or minus the amount by which closing working capital beats or misses the peg, minus transaction expenses, equals net proceeds to the seller. Close above the peg and the buyer owes you more; close below it and the buyer claws money back dollar-for-dollar.
The adjustment is not instant. Buyers prepared the initial closing calculation in 97% of deals in the 2023 ABA study, and they typically have 60 to 90 days after closing to deliver the statement, followed by roughly a 30-day window for the seller to object (Valutico). A majority of deals, 58% in the 2025 ABA study, now park a separate escrow to fund any shortfall. The reassuring news for sellers: SRS Acquiom found buyers' proposed calculations were accepted in about 7 out of 10 cases, and even contested claims cleared in under two months on a median basis.
Many agreements soften the swing with a collar, a tolerance band around the peg that triggers no adjustment for small deviations. A Valutico example uses a $50,000 no-adjustment band around a $2 million peg, and lower-middle-market collars commonly land in the $100,000 to $250,000 range. Disputes still happen: in the Delaware Court of Chancery case Driven Intermediate Holdings, Inc. v. Jimenez, the buyer's closing statement claimed a $2.72 million adjustment, the sellers pushed back, and the parties brought in a Deloitte partner as the independent accountant to resolve the disputed items.
One structural choice sets the tone for all of this, whether the deal uses completion accounts or a locked box.
| Dimension | Completion accounts | Locked box |
|---|---|---|
| Where it is common | North America | Europe |
| When price is fixed | After closing, via a true-up | Before signing, at a set balance sheet date |
| Working capital risk | Adjusted to the actual closing figure | Fixed; interim risk shifts to the buyer |
| Certainty of proceeds | 60 to 90+ days after close | Known at signing |
Source: Valutico
Frequently Asked Questions
Why do buyers exclude cash and debt from net working capital in M&A deals?
Because most middle-market deals are structured cash-free and debt-free (SRS Acquiom). The seller keeps the cash on the balance sheet and pays off interest-bearing debt at closing, so buyers only value the operating items, receivables, inventory, and payables, needed to run the business. Including cash or debt would double-count value the parties already settled separately.
What is a net working capital peg and how is it set?
The peg is the target working capital level the business is expected to deliver at closing, usually set as an average of normalized net working capital over the trailing twelve months (Baker Tilly). Buyers refine it through diligence, often using a quality of earnings report that runs $20,000 to $75,000. Seasonal businesses may use a longer or reweighted review period so the peg reflects a normal operating cycle.
What happens if actual closing working capital is lower than the peg?
The buyer reduces the purchase price dollar-for-dollar for the shortfall, typically drawing on an escrow set aside for the adjustment; 58% of deals in the 2025 ABA study used a separate adjustment escrow. Many agreements include a collar, so small misses inside the tolerance band trigger no payment. If the gap is large or disputed, the parties usually refer it to an independent accountant.
What to Watch Before You Sign
The change in net working capital is not a line most owners think about until a closing statement lands two or three months after they believed the deal was finished. By then the peg is fixed, the definitions are locked, and money moves in whichever direction the numbers point. Owners who protect their proceeds are the ones who normalize working capital early, argue the peg on real trailing data, and understand the true-up mechanics before they sign, not after. That preparation is where Iconic focuses on the sell side. If you want a grounded read on where your business stands before a buyer sets the terms, start with a complimentary valuation and build the rest of the process on numbers you can defend.
