Purchase Price Mechanics: Working Capital Adjustments, Net Debt, and How the Final Number Gets Calculated

By Hank FasthoffJuly 6, 2026

When a buyer and seller agree to a $5 million purchase price in the letter of intent, most sellers assume they'll receive $5 million at closing. They rarely do. In almost every private company acquisition, the price stated in the LOI is the enterprise value, not the equity value. Between signing and closing, that enterprise value is adjusted for the company's working capital position, outstanding debt, cash on hand, and unpaid transaction expenses. The adjustments can shift the seller's actual proceeds by hundreds of thousands of dollars in either direction, and understanding how they work before signing the purchase agreement is the difference between a clean exit and a costly surprise.

Working capital adjustments appear in more than 90 percent of private-target M&A transactions. They're the single most common source of post-closing disputes. Getting the mechanics right isn't optional.

Enterprise Value Versus Equity Value

Enterprise value is what the buyer is paying for the business as an operating entity, independent of how it's financed or how much cash is in its bank account. Equity value is what the seller receives, after accounting for the company's debt, cash, and working capital position.

In a simplified formula, equity value equals enterprise value, minus outstanding debt, plus cash on hand, plus or minus a working capital adjustment, minus unpaid seller transaction expenses.

If the enterprise value is $5 million, the company has $500,000 in debt, $200,000 in cash, and working capital that's $100,000 below the agreed target, the seller's equity value is $5,000,000 minus $500,000 plus $200,000 minus $100,000, which equals $4,600,000, four hundred thousand short of the headline number.

Each component of that bridge from enterprise value to equity value is defined in the purchase agreement and measured at closing.

Working Capital Adjustments

Working capital, for purchase price adjustment purposes, is typically defined as current assets minus current liabilities, excluding cash and debt (which are accounted for separately in the enterprise-to-equity bridge).

In a normally operating business, working capital fluctuates with revenue cycles, seasonal patterns, and the timing of receivables and payables. A business needs a certain level of working capital to fund day-to-day operations, and the purchase agreement should ensure the buyer receives a "normal" level of working capital at closing, neither depleted (which would force the buyer to inject cash after closing to keep the business running) nor inflated (which would mean the buyer paid for working capital that evaporates in the weeks after closing).

Setting the Peg. The working capital "peg" or "target" is the agreed benchmark against which actual closing working capital is measured. It's typically set as a trailing 12-month average of monthly working capital balances, calculated during financial due diligence as part of the quality of earnings analysis.

A 12-month average smooths out seasonal fluctuations and produces a benchmark that represents normal operating levels. But averages can be misleading. A retailer whose working capital peaks in December and troughs in February may have a 12-month average that doesn't match any actual month. If the deal closes in February, the actual working capital will be significantly below the average, producing a purchase price reduction the seller didn't anticipate.

For seasonal businesses, the peg should be matched to the period when closing is expected, using a quarterly average from comparable quarters in prior years rather than a straight annual average. Include the methodology and a worked example as an exhibit to the purchase agreement so both sides understand how the number was derived and how it will be measured at closing.

True-Up. At closing, the parties estimate the company's working capital based on financial data available a few days before closing (typically three to five days before the closing date). The estimated working capital is compared to the peg, and the purchase price is adjusted upward or downward by the difference.

After closing (typically 60 to 90 days), the buyer prepares a closing statement that calculates actual working capital as of the closing date using the methodology specified in the purchase agreement. If actual working capital differs from the estimated working capital used at closing, a true-up payment is made. If actual working capital was higher than estimated, the buyer pays the seller the difference. If actual working capital was lower than estimated, the seller pays the buyer the difference (usually from an escrow established for this purpose).

Net Debt Adjustment

Enterprise value assumes the business is acquired on a "cash-free, debt-free" basis. Any debt remaining in the company at closing is deducted from the enterprise value to calculate equity value, because the buyer is inheriting the obligation to repay it.

"Debt" for purchase price purposes is typically defined more broadly than just bank loans. It usually includes term loans, revolving credit facility balances, equipment financing, capital leases, related-party loans, seller notes from prior transactions, accrued but unpaid interest, unpaid income taxes, deferred compensation obligations, and any other obligations that function like debt (sometimes called "debt-like items").

Defining what constitutes "debt" versus "working capital" is one of the most consequential drafting exercises in the purchase agreement. An item classified as debt reduces the purchase price dollar-for-dollar. An item classified as a current liability within working capital is compared against the peg and may or may not produce an adjustment depending on whether the peg already accounts for it. Misclassifying an item between the two categories can shift hundreds of thousands of dollars from one party to the other.

Cash-on-Hand Adjustment

Cash on hand at closing is added to the enterprise value because the buyer is acquiring the entity's cash along with its operating assets. If the company has $200,000 in its operating accounts at closing, that $200,000 increases the equity value (and the seller's proceeds) by the same amount.

"Cash" for purchase price purposes should be defined to include cash in bank accounts, cash equivalents, and short-term investments, net of any outstanding checks, wire transfers in transit, and restricted cash (deposits held as collateral, escrow funds, or amounts restricted by contract or regulation).

Transaction Expenses

Unpaid seller transaction expenses are typically deducted from the purchase price or paid at closing from the seller's proceeds. These include the seller's legal fees, accounting fees, investment banking or broker fees, any retention bonuses or transaction-triggered compensation payable to employees, and any other costs the seller incurred in connection with the sale.

If transaction expenses aren't addressed in the purchase agreement, the buyer may inherit the obligation to pay the seller's advisors out of the company's operating funds after closing, which reduces the value the buyer received.

The Closing Statement and Dispute Resolution

After closing, the buyer prepares a closing statement calculating actual working capital, net debt, cash, and transaction expenses as of the closing date. The buyer delivers the closing statement to the seller within the period specified in the purchase agreement (typically 60 to 90 days after closing).

Sellers should also account for the review period (typically 30 days) during which the seller can examine the closing statement and either accept it or deliver a written objection identifying the specific items in dispute and the seller's proposed adjustments. If the seller doesn't object within the review period, the closing statement is deemed final.

If the seller objects, the parties negotiate to resolve the disputed items during a specified period (typically 30 days). If they can't resolve the disputes through negotiation, the purchase agreement provides for an independent accounting firm to make a binding determination. The independent accountant's role is limited to resolving the disputed items (not re-preparing the entire closing statement), and the accountant's determination can't fall outside the range of the buyer's position and the seller's position on each disputed item.

Costs of the independent accountant are typically allocated proportionally based on which party's position prevails. If the accountant resolves a $100,000 dispute by adjusting $70,000 in the buyer's favor and $30,000 in the seller's favor, the buyer pays 30 percent and the seller pays 70 percent of the accountant's fees.

Collars and Tolerance Bands

To avoid disputes over immaterial amounts, many purchase agreements include a "collar" or "tolerance band" around the working capital peg. If the difference between actual working capital and the peg falls within the collar (for example, plus or minus $50,000 on a $2 million peg), no adjustment payment is made.

Collars can be structured as a "dead band" (no adjustment at all if the deviation is within the band) or a "tipping basket" (if the deviation exceeds the band, the full amount of the deviation becomes an adjustment, not just the excess over the band). Which structure applies should be stated in the purchase agreement.

A collar reduces post-closing disputes over small amounts but also means that one party absorbs a working capital shortfall or surplus that it would otherwise be compensated for. Sellers prefer wider collars (which absorb more variance without reducing their proceeds). Buyers prefer narrower collars or no collar at all (which ensures dollar-for-dollar accuracy).

Locked-Box Versus Completion Accounts

U.S. middle-market transactions predominantly use the completion accounts mechanism described above, where the purchase price is adjusted after closing based on the company's actual financial position at the closing date.

An alternative mechanism, the locked-box approach, is more common in European transactions and is gaining some traction in U.S. private equity deals. Under a locked-box structure, the purchase price is fixed by reference to a historical balance sheet (the "locked-box date," typically the most recent audited or reviewed financial statements) rather than measured at closing. From the locked-box date forward, the seller is prohibited from extracting value from the business through dividends, distributions, management fees, related-party payments, or other "leakage." If no leakage occurs, the purchase price isn't adjusted.

A locked-box structure provides the seller certainty (the price is fixed before closing and won't be reduced by a post-closing true-up) but transfers economic risk to the buyer between the locked-box date and closing (because the buyer bears the risk of working capital depletion or debt accumulation during that period). Locked-box structures work best when the company has reliable financial reporting, a predictable working capital profile, and a short interval between signing and closing.

Practical Recommendations

Negotiate the working capital peg before signing the purchase agreement, not after. The peg is the most consequential number in the entire adjustment mechanism, and every other provision is downstream of it. Use the quality of earnings analysis to support the peg, and include a worked example as an exhibit to the purchase agreement.

Define "working capital," "debt," and "cash" with precision and include an illustrative schedule showing which accounts are classified in each category. Ambiguous definitions are the most common source of post-closing purchase price disputes, and the time to resolve the ambiguity is during the negotiation, not during the 90-day post-closing review period.

Don't let the same item appear in both the debt deduction and the working capital calculation. If accrued bonuses are deducted as "debt" in the enterprise-to-equity bridge and also included as a current liability in the working capital calculation, the seller is paying for the same item twice. Build the categories as mutually exclusive buckets.

Specify the accounting methodology for the closing statement. The most common approach requires the closing statement to be prepared using the same accounting policies and practices the company used in preparing its historical financial statements, not GAAP in the abstract. "Consistent with past practice" produces an apples-to-apples comparison against the data used to set the peg.

For seasonal businesses, match the peg to the expected closing period rather than using a straight 12-month average. If closing is expected in Q1, set the peg using Q1 averages from the prior two or three years rather than a full-year average that no Q1 will match.

If you're the seller, consider negotiating a collar around the peg to absorb immaterial variances. A plus-or-minus two percent band reduces post-closing friction without materially affecting the economics. If you're the buyer, resist collars or negotiate them narrow enough to preserve the accuracy of the adjustment.

Fund the working capital adjustment with a dedicated escrow, typically one to two percent of the purchase price, held for 90 to 120 days. Once the closing statement is finalized, the escrow is distributed to the prevailing party.