Working Capital Adjustments in M&A: What Every Seller Should Understand Before Closing
You agree to sell your company for $10M. The buyer's lawyer drafts a purchase agreement with a working capital adjustment provision. You sign it without fully understanding the mechanics. At closing, the buyer's accountants calculate that your working capital is $400,000 below the target, and your check is $9.6M instead of $10M. That $400,000 difference was avoidable if you had known what to negotiate before signing the LOI.
Working capital adjustments are present in more than 90% of private-company acquisitions, according to the SRS Acquiom 2026 Working Capital PPA Study, which analyzed over 1,500 deals totaling more than $385 billion. A decade ago, that number was closer to 50%. Today, these provisions are standard, and buyers expect them. Sellers who do not understand the mechanics leave money on the table. This guide covers how the peg works, what to negotiate, the traps to avoid, and what to do when a post-closing dispute arises.
Working Capital Adjustments in 90 Seconds: Why Your Closing Check Might Be $500K Less Than the Purchase Price
Working capital adjustments exist because the buyer is purchasing a business that needs a certain level of short-term assets to keep running on day one. The adjustment ensures the buyer gets a company with enough cash in the register, inventory on the shelves, and receivables in the pipeline to operate without immediately injecting their own capital.
Why Your Closing Check Might Be Different from the Purchase Price
The purchase price in an M&A deal assumes the business will be delivered with a "normal" level of working capital. If you deliver more working capital than the agreed target, the buyer pays you extra. If you deliver less, the buyer deducts the shortfall from your proceeds. The adjustment is dollar-for-dollar. Every dollar of working capital below the target is a dollar out of your pocket. Every dollar above the target is a dollar added to your check.
Why Working Capital Adjustments Exist
Without a working capital adjustment, a seller could drain the company's cash, delay paying vendors, and accelerate collections in the weeks before closing to put extra cash in their pocket. The buyer would take over a company with empty shelves and angry suppliers. The adjustment prevents that by establishing a baseline level of working capital the seller must deliver. It protects both sides: the buyer gets a functioning business, and the seller gets credit for any working capital above the target.
How the Working Capital Peg Works: A $5M Deal Example with Dollar-for-Dollar Math
The working capital peg, also called the target, is the number that determines whether the purchase price gets adjusted up or down at closing. Getting this number right is one of the most consequential negotiations in the entire deal.
What Is a Working Capital Peg (Target)?
The peg is a fixed dollar amount of net working capital that the seller agrees to deliver at closing. Net working capital is typically defined as current assets minus current liabilities, though the specific definition varies by deal. The peg represents the "normal" operating level of working capital the business needs to function. If the business normally operates with $1.2M in net working capital, the peg might be set at $1.2M.
How the Peg Is Calculated — Trailing Average Method
Most buyers and their advisors calculate the peg using a trailing average of the company's monthly net working capital over the prior 12 to 24 months. The SRS Acquiom 2026 M&A Deal Terms Study, which analyzed more than 2,300 deals totaling $569 billion, confirms that trailing averages remain the dominant methodology. The lookback period matters because it determines which months are included in the average. A company with seasonal revenue swings will have very different trailing averages depending on whether the calculation uses 6 months, 12 months, or 24 months.
The Closing Adjustment — Dollar-for-Dollar True-Up
At closing, the buyer's accountants estimate the company's actual net working capital as of the closing date. If the estimate exceeds the peg, the buyer pays the seller the difference. If the estimate falls short, the buyer deducts the difference. This is an estimate because final numbers are not available on closing day. The purchase agreement specifies a window, usually 30 to 90 days after closing, for the buyer to prepare a final closing balance sheet and calculate the true-up.
Worked Example: A $5M Sale with a Working Capital Adjustment
Seller agrees to a $5M purchase price with a working capital peg of $800,000. At closing, the estimated net working capital is $720,000, which is $80,000 below the peg. The buyer deducts $80,000 from the closing payment, and the seller receives $4.92M. Sixty days later, the buyer's accountants prepare the final closing balance sheet and determine that actual net working capital was $750,000. The shortfall is now $50,000 instead of $80,000, so the buyer owes the seller a $30,000 true-up payment. The seller's final proceeds are $4.95M. In this example, the $50,000 working capital shortfall reduced the seller's proceeds by 1% of the deal value. In larger deals with tighter margins, the adjustment can run into the millions.
What Sellers Need to Negotiate Upfront: 4 Provisions That Protect $200K to $1M in Proceeds
The working capital section of the purchase agreement is one of the most technical parts of the deal, and it is where buyers with experienced counsel gain an edge over sellers who treat it as boilerplate.
Setting a Fair Peg — The Lookback Period Matters
A 12-month trailing average is standard, but the specific 12 months matter. If your business had an unusually strong Q4 with elevated inventory and receivables, a trailing average ending in December will produce a higher peg than one ending in September. A higher peg means you need to deliver more working capital at closing. Sellers should push for a lookback period that reflects the business's normal operating cycle, not a period inflated by seasonal peaks. Your advisor should model the peg under multiple lookback scenarios and negotiate the one that most accurately reflects typical operations.
Including vs. Excluding Cash and Debt
The definition of net working capital in the purchase agreement determines which balance sheet items are included. Cash and cash equivalents are frequently excluded from the working capital calculation because the deal is priced on a "cash-free, debt-free" basis, meaning the seller keeps excess cash and pays off debt at closing. However, the boundary between "operating cash" and "excess cash" is negotiable. A company that needs $200,000 in the bank at all times to cover payroll and vendor payments has operating cash that arguably belongs in the working capital calculation. A company with $2M sitting in a money market account has excess cash that does not. Where the line falls affects the peg and, by extension, the adjustment.
Collar Provisions — Limiting the Adjustment Range
A working capital collar sets a range around the peg within which no adjustment occurs. For example, a $50,000 collar on a $1M peg means that if the closing working capital falls between $950,000 and $1.05M, neither side pays or receives an adjustment. Collars protect both parties from immaterial fluctuations caused by timing differences in collections or payments. According to the ABA 2025 Private Target Deal Points Study, deal terms continue to evolve in favor of more structured protections, with rep-and-warranty insurance appearing in 63% of deals, up from 29% in 2016. Sellers should push for a collar to avoid disputes over small amounts that cost more to litigate than they are worth.
The Definition of "Net Working Capital" Is Negotiable
This is the provision that catches the most sellers off guard. The buyer's first draft of the purchase agreement will define net working capital in a way that serves the buyer's interests. Items that might be excluded from current assets (like certain prepaid expenses) or included in current liabilities (like accrued bonuses) change the math. A definition that excludes $100,000 in prepaid insurance from current assets and includes $150,000 in accrued vacation in current liabilities shifts the peg by $250,000, which is a $250,000 reduction in your closing proceeds. Every line item in the definition should be reviewed and negotiated.
Common Seller Traps in Working Capital Provisions: 3 Tactics That Cost Sellers $300K on Average
Buyers and their advisors have seen hundreds of deals. Most sellers have seen one. That experience gap shows up in the working capital provisions.
The Buyer Who Manipulates the Closing Balance Sheet
After closing, the buyer controls the company's books. The purchase agreement gives the buyer 60 to 90 days to prepare the final closing balance sheet and calculate the true-up. A buyer who changes accounting methods, reclassifies assets, or accelerates liability recognition during that window can reduce the closing working capital and trigger a payment from the seller. The SRS Acquiom data shows that purchase price adjustments are present in more than 90% of deals, and disputes about the closing balance sheet are among the most common post-closing conflicts. The protection against this is a provision in the purchase agreement requiring the buyer to use the same accounting methods, policies, and practices the company used historically.
Seasonal Businesses and Timing Games
A landscaping company with $2M in revenue does 60% of its business between April and September. If the deal closes in November, receivables are low, inventory is minimal, and net working capital is at its annual trough. A peg based on a 12-month average will be higher than the November reality, triggering a downward adjustment. The seller pays for seasonality they cannot control. Seasonal businesses should negotiate a peg based on same-month historical averages, not annual averages. Closing in November? The peg should reflect November's typical working capital, not the full-year average.
GAAP Methodology Disputes
The phrase "in accordance with GAAP" appears in nearly every working capital provision, but GAAP allows judgment in areas like revenue recognition, allowance for doubtful accounts, inventory valuation, and accrual timing. Two accountants applying GAAP to the same business can produce net working capital figures that differ by hundreds of thousands of dollars. The purchase agreement should specify not just "GAAP" but "GAAP applied consistently with the company's historical practices" to limit the buyer's ability to reinterpret the numbers after closing.
Post-Closing Disputes and How to Handle Them: What Happens in the 30 to 90 Days After You Sign
Even well-negotiated working capital provisions produce disputes. The question is whether the dispute gets resolved quickly and cheaply or drags on for months with lawyers billing $600 an hour.
The 30-90 Day True-Up Window
The purchase agreement specifies a period, typically 60 to 90 days after closing, during which the buyer prepares the final closing balance sheet. The seller then has a review period, usually 30 days, to accept the buyer's calculations or object. If the seller objects, the parties enter a negotiation period. The timeline matters because the seller's escrow or holdback funds are tied up until the dispute is resolved.
Dispute Resolution Mechanisms
Most purchase agreements specify that if the parties cannot agree on the closing working capital within a defined period, the dispute goes to an independent accounting firm for resolution. The independent accountant acts as an arbitrator, reviewing both sides' positions and issuing a binding determination. The cost is split between the parties, usually based on how close each side's position was to the final determination. A seller whose position is 90% correct pays 10% of the independent accountant's fees.
When to Involve Independent Accountants
If the gap between the buyer's calculation and your calculation is less than $50,000 on a $5M deal, it is usually cheaper to negotiate a settlement than to engage an independent accountant, whose fees can run $50,000 to $150,000 for a complex determination. If the gap is $200,000 or more, an independent accountant is worth the cost. Your M&A advisor should help you assess whether the buyer's position has merit or is a post-closing negotiating tactic designed to claw back part of the purchase price.
How Your M&A Advisor Should Protect You: The 5 Questions to Ask Before Signing the LOI
A competent M&A advisor earns their fee in the working capital negotiation. The SRS Acquiom data showing working capital provisions in 90%+ of deals means your advisor has no excuse for being surprised by the mechanics. Here are the five questions to ask your advisor before you sign the letter of intent.
First, what working capital peg are you recommending, and what lookback period and methodology did you use to calculate it? Second, which balance sheet line items are included in the net working capital definition, and have you compared the buyer's proposed definition against the company's historical balance sheets to quantify the impact of any differences? Third, does the purchase agreement include a collar, and if not, why not? Fourth, does the provision require the buyer to use the company's historical accounting methods when preparing the closing balance sheet? Fifth, what is your experience with post-closing working capital disputes, and who on your team will handle the true-up process?
An advisor who cannot answer these questions clearly is not equipped to protect you in the most technical and dollar-consequential part of the deal. The difference between a well-negotiated working capital provision and a poorly negotiated one can be $200,000 to $1M on a $10M deal. That difference often exceeds the advisor's entire fee.
