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Working Capital Adjustments: The Number That Changes Between Signing and Closing

Author: Yanni Papoutsi - Fractional VP of Finance and Strategy for early-stage startups - Author, Exit Ready Published: 2026-03-14 - Last updated: 2026-03-14

Reading time: ~12 min

What Working Capital Is and Why Buyers Care

Working capital is the operating cash needed to run a business: customer invoices you have not collected (accounts receivable), inventory you have purchased but not sold, and cash minus money you owe vendors (accounts payable) and accrued expenses. The formula is simple: WC = (AR + Inventory + Cash) - (AP + Accrued Expenses).

A typical e-commerce company needs 30-45 days of working capital. If daily revenue is $100K, you need roughly $3-4.5M in WC to operate: $2.5M in customer invoices (30-45 days of AR), $1M in inventory, minus $500K in vendor payables. When you sell the company, the buyer assumes all of these balances. The buyer needs that $3-4.5M in WC to keep the business running post-close.

This is where the adjustment comes in. The buyer does not want to pay for 50 days of WC if 30 days is standard. And they do not want to overpay for excess inventory that sits unused. So the deal is structured with a target WC level. If actual WC at closing exceeds the target, the buyer pays the seller additional cash (dollar-for-dollar). If actual WC falls short, the buyer withholds funds from the seller's purchase price (or deducts from an escrow).

For example: You agree on a $100M deal price with a target WC of $5M. At closing, actual WC is measured at $5.5M (higher than expected because a large customer paid slowly). The buyer pays you an additional $500K. Conversely, if actual WC is $4.5M, the buyer deducts $500K from your proceeds. This seems fair in theory, but in practice, it is where deals leak value.

The Peg Mechanism and How It Works

The working capital mechanism is typically structured as a peg or target system. At signing, you provide a balance sheet showing your estimated WC. This becomes the target. The calculation is:

Adjustment = Actual Closing WC - Target WC

If the adjustment is positive (actual exceeds target), the seller (you) receives cash. If it is negative, you owe money back. The challenge is defining "actual closing WC" and "target WC" in a way that is fair and not manipulated by the buyer.

Best practice: Use your last audited or reviewed balance sheet as the baseline target. If your balance sheet as of June 30 shows $5M WC, that becomes the target. At closing (say, September 30), the buyer measures actual WC using the same accounting methods and policies you used historically. Any variance triggers an adjustment.

The devil is in the details:

- Which accounting methods apply? Your historical GAAP accounting or the buyer's accounting policies?
- How are reserves calculated? Are reserves for bad debt, inventory obsolescence, and returns calculated using historical percentages or buyer estimates?
- What is included in WC? Does it include deferred revenue (customer prepayments) as a reduction?
- How is inventory valued? LIFO, FIFO, or weighted average?

Buyers often want to shift from your historical methods to theirs, which inflates reserves and reduces WC at closing. This triggers a seller clawback.

A Concrete Example of Working Capital Adjustment

Let's model a realistic scenario:

Your SaaS company is valued at $50M EBITDA and sells for $500M (10x multiple). Your June 30 balance sheet (target) shows:

Accounts Receivable: $8M (30 days of revenue)
Inventory: $0 (SaaS, no physical inventory)
Cash: $2M
Accounts Payable: ($2M)
Accrued Expenses: ($1.5M)
Target WC: $6.5M

The deal agreement targets $6.5M WC. Any variance from this is subject to adjustment.

Closing happens September 30. The buyer measures actual WC as follows:

AR: $9M (slower collections than expected; some customers paid on 45-day terms)
Inventory: $0
Cash: $2M
AP: ($1.8M) (buyer negotiated extended terms with vendors)
Accrued Expenses: ($2.5M) (buyer accrued additional warranty reserves)
Actual WC: $6.7M

Adjustment = $6.7M - $6.5M = $200K. The buyer owes the seller an additional $200K.

This seems fair. But what if the buyer is aggressive?

Aggressive buyer scenario:

The buyer switches from your historical accounting to their own policies. They calculate reserves more conservatively:

AR: $9M, but apply a 3% bad debt reserve (vs. your historical 0.5%). Bad debt reserve: ($270K) instead of ($45K). Effective AR: $8.73M.
Accrued Expenses: ($3.5M) (buyer accrues higher warranty costs and customer support refunds based on post-close experience, not historical rates).
Deferred Revenue: ($1M) (customer prepayments reduce WC; not counted by your historical method).

Aggressive buyer WC: $8.73M + $0 + $2M - $1.8M - $3.5M - $1M = $3.43M

Adjustment = $3.43M - $6.5M = ($3.07M). The seller owes the buyer $3.07M.

The difference between reasonable accounting and aggressive accounting is $3.27M. That is 6.5% of the $50M deal price. The buyer just clawed back millions through a WC dispute.

How Buyers Manipulate Working Capital Adjustments

Buyers deploy several tactics to reduce WC and trigger seller clawbacks:

- Inflated bad debt reserves: Claiming more AR is uncollectible than historical experience justifies. If your AR has historically been 0.5% uncollectible, the buyer claims 2-3% and writes down the balance.
- Aggressive inventory reserves: Claiming inventory is obsolete, slow-moving, or damaged when it is not. The buyer counts this as a WC reduction.
- Liberal accruals for warranties and returns: The buyer accrues warranty reserves and anticipated customer refunds based on post-close experience (not your historical rates). This is insidious because the buyer is using actual post-close data to justify higher accruals at closing, even though closing happened before that experience occurred. It is reverse retroactive accounting.
- Deferred revenue treatment: If your balance sheet does not include customer prepayments as a WC reduction, the buyer applies different treatment and reduces WC by the prepayment amount.
- Cash adjustments: The buyer excludes certain cash (escrow, restricted cash, or cash earmarked for specific purposes) from the WC calculation, effectively reducing WC.
- Timing manipulation: If closing happens at the end of a weak revenue month, AR is naturally lower. The buyer claims this is the "normalized" level and requires the seller to pay down for higher historical WC.

The pattern is clear: the buyer controls the accounting after close and has every incentive to minimize actual WC and trigger a seller adjustment.

Protecting Yourself: Tight WC Clause Language

Negotiating the WC adjustment clause requires precision. Key protections:

- Clear definition of WC: Specify exactly what is included. Example: "Working Capital means current assets (AR, inventory, prepaid expenses, and cash) minus current liabilities (AP, accrued expenses, and deferred revenue), calculated in accordance with the company's historical GAAP accounting policies as of the target date."
- Reference balance sheet: Use your audited or reviewed balance sheet as the baseline. The target WC is calculated on this balance sheet using the same methodology.
- Accounting continuity: Require that closing WC is calculated using your historical accounting policies and methods, not the buyer's. This prevents methodological shifts that inflate reserves.
- Reserve calculations: Specify that bad debt, inventory, and warranty reserves are calculated using your historical percentages or rates, not buyer judgment.
- Caps and collars: Set a cap on WC adjustments. For example, "Adjustments shall be capped at 5% of purchase price." This prevents a surprise $5M clawback on a $100M deal.
- Basket: Require adjustments below a minimum threshold (e.g., below $100K) are ignored. Only material adjustments trigger payment.
- Independent dispute resolution: If buyer and seller disagree on actual WC, require a "blind" determination by a mutually selected independent accountant. Each side submits its WC calculation; the accountant picks the closer one. This disincentivizes extreme positions because your number might be chosen in full.

- Seller rep sign-off: Require the seller's representative (CFO or controller) to sign the WC closing statement. This adds professional liability and makes aggressive claims riskier.

Negotiating WC Terms Early

Most founders focus on the headline purchase price and equity/cash splits, ignoring WC until the final term sheet. This is a mistake. WC language should be negotiated early, as part of the LOI or preliminary term sheet discussion. For a complete playbook on exit preparation and negotiation, see Exit Ready.

Starting position: "We target 40 days of WC, which based on our trailing revenue of $X, equals $Y million. This is our target. Adjustments are limited to +/- $500K. Any dispute goes to [Big Four accounting firm] for blind determination. We use our historical GAAP accounting methods, and reserves are calculated using our historical percentages."

Buyer pushback: "That is too tight. We need flexibility because WC fluctuates. We also prefer to use consistent accounting methods across all acquired companies."

Compromise: "We accept a +/- 10% variance on target WC (e.g., $6.5M +/- $650K). Adjustments above this are capped at $500K. Accounting methods are your standards, but reserves use our historical rates for the first 12 months post-close, and you cannot retroactively adjust reserves based on post-close experience."

The key is getting some protection in place rather than a blank check.

Post-Closing Disputes and Arbitration

Most WC disputes emerge 60-120 days post-closing when the buyer's accounting team completes the final WC calculation. By this point, you have received the majority of proceeds (minus escrow). The buyer claims actual WC is $2M below target and wants a $2M refund from escrow or your post-close working capital accounts.

If you have no dispute resolution clause, you are in litigation hell. The buyer controls the books and the buyer's accountant will testify that their WC calculation is "GAAP compliant." You will fight for months, rack up $100K+ in legal bills, and often settle for 50-70% of your claim because both sides are tired and uncertain.

Better approach: Include an independent accounting firm determination in the deal agreement. If you and the buyer cannot agree on WC within 60 days of closing, you each submit your WC calculation to the agreed accountant (e.g., "the Big Four firm mutually selected by both parties"). The accountant determines which party's calculation is closer to correct and that calculation is binding. This speeds resolution and prevents standoff.

Real-World Scenarios and Outcomes

I worked with a founder whose $75M acquisition included loose WC language. The buyer measured actual WC at $3M below the seller's target and claimed a $3M refund. The seller contested it but had no specific agreement on reserve methodology. After 8 months of dispute, they settled for $2M refund—the seller's claim was right but they did not have the contractual ammunition to defend it. The firm hired an advisor to renegotiate; it was too late. The lesson: tight WC language would have saved $2M and 8 months of distraction.

Another founder negotiated a tight WC clause with caps, collars, and independent accounting determination. The buyer claimed $1.5M adjustment; the seller claimed no adjustment. The independent accountant reviewed both and determined the truth was $750K adjustment (midway). The seller received $750K less than the headline price. It was fair, predictable, and resolved in 75 days. The tight clause made all the difference.