You spent twenty years building your business, survived the due-diligence gauntlet, and finally wired the champagne moment: the sale closed, and the purchase price hit your account. Ninety days later, a letter arrives from the buyer's accountants. It says you owe $1.1 million back — because of something called a "working capital adjustment."
You did not commit fraud. You did not hide anything. You fell into a mechanical trap buried in your own purchase agreement: the target you promised and the closing balance sheet you delivered were measured with two different rulers. Here is how that trap works, why small-business sellers are especially exposed, and the five clauses that defuse it before you sign.
Why Nearly Every Deal Has a Working Capital Adjustment
Working capital is current assets minus current liabilities — the cash, receivables, and inventory on one side, net of payables and accrued expenses on the other. It is the fuel in the tank that keeps the business running between the day you close and the day the buyer's own cash cycle kicks in.
Buyers need a guarantee that the tank is full at handover. Without one, a seller could collect every receivable, drain every shelf, and delay every vendor payment in the weeks before closing — pocketing the cash while delivering a business that stalls on day one. So the purchase agreement sets a working capital target (often called the "peg"): the level of working capital you promise to deliver at closing.
The peg is usually derived from your own history — the balance at your most recent fiscal period-end, or more commonly an average of monthly balances over the trailing twelve months, which smooths out seasonal swings. If closing working capital comes in above the target, the buyer pays you the difference. If it comes in below, you pay the buyer. Many agreements add a small collar — say, 5% either way — inside which no money changes hands.
This mechanism is now close to universal. Analyses of private-target acquisitions covering thousands of deals and hundreds of billions in value find that a working capital adjustment appears in more than 90% of transactions, up from roughly half of deals a decade ago — and that working capital is the single most disputed purchase-price item after closing. If you sell your business, you will almost certainly sign one of these clauses. The question is whether yours is drafted to measure fairly.
How the Trap Springs: A $5 Million Example
Walk through the arithmetic, because the trap hides in it.
Suppose you and the buyer agree on a working capital target of $5,000,000, taken straight from your balance sheet at the most recent quarter-end. After closing, you prepare the closing balance sheet and compute closing working capital of $4,950,000. The $50,000 shortfall sits inside the agreement's 5% collar. You owe nothing. Case closed — or so you think.
But the purchase agreement gives the buyer's accountants the right to review your closing balance sheet, typically within 60 to 90 days. Their review is careful, professional, and devastating. They note that your books were never quite GAAP: receivables carry no allowance for doubtful accounts, and inventory is booked at cost with no write-down for obsolete stock. They restate both items properly — and closing working capital drops to $3,900,000. The demand letter follows: you owe $1,100,000.
Your objection is obvious and correct on the merits: this is not an apples-to-apples comparison. The $5,000,000 target was computed from the same non-GAAP books. Had the target been restated the way the buyer restated the closing sheet, it would have been roughly $3,900,000 too — and no payment would be due.
And here is the trap: the purchase agreement defines the target as a bare number. It says "Target Working Capital means $5,000,000." There is no contractual language tying that number back to the financial statements it came from, and no provision restating it when the closing calculation uses a different methodology. The buyer's number stands. You write the check — or you fight about it with escrow funds frozen and lawyers billing by the hour.
Why Small-Business Books Are Especially Exposed
Large companies get audited annually, so their targets and closing sheets usually speak the same GAAP dialect. Small businesses live in a different world, and every difference is a wedge the adjustment can exploit:
- Cash- or tax-basis books. If your accountant keeps the books on the tax basis to minimize your tax bill, reserves, accruals, and write-downs that GAAP requires may never appear. The target inherits every one of those omissions.
- No allowance for doubtful accounts. Many owner-managed businesses carry receivables at gross and write off bad debts only when they give up collecting. A buyer applying GAAP will age your receivables and reserve against the old ones — sometimes a six-figure haircut.
- Stale inventory. Slow-moving or obsolete stock sitting at full cost is the classic restatement item. GAAP requires the lower of cost or net realizable value; your books may never have taken the markdown.
- Related-party and owner receivables. Loans to you, your family, or your other entities parked in accounts receivable look like working capital but are not operating assets. Buyers routinely strip them out — from the closing sheet, but not from a bare-number target.
- Debt-like items hiding in current liabilities — or missing from them. Accrued vacation, bonuses, warranty reserves, customer deposits, and deferred revenue are all judgment calls. Whatever the agreement fails to classify explicitly becomes ammunition in the 90-day review.
None of this requires bad faith on either side. It only requires two accountants applying two different rulebooks to two different dates, with a contract that never says they must match.
The Real Cost Goes Beyond the Check
A seven-figure adjustment demand hurts on its own. The collateral damage can hurt more:
- Tax timing. If the dispute drags into the next tax year, the repayment may fall in a different reporting period than the sale proceeds — complicating your return and, in the worst case, stranding you with tax paid on money you had to give back. Resolve the mechanics fast, and loop in your CPA before you concede anything.
- Frozen escrow. Most deals hold part of the price in escrow precisely to fund adjustments and indemnity claims. A disputed adjustment keeps that money locked up while the fight plays out.
- The referee is expensive. Purchase agreements typically escalate deadlocks to an independent accounting firm whose decision is binding. That process costs tens of thousands of dollars and months of management attention — over what is, at bottom, a drafting failure.
- The relationship. If you stay on as a consultant, employee, or earnout participant, opening the post-closing era with a million-dollar demand poisons everything after it.
How to Defuse the Trap Before You Sign
Every one of these outcomes is preventable at the negotiating table, when leverage is still yours. Bring this checklist to your accountant and your deal attorney.
1. Get your books reviewed before the letter of intent
The single highest-return move is a sell-side quality-of-earnings review — or at minimum a GAAP diagnostic of working capital — before anyone drafts a target. You want to discover the missing bad-debt reserve and the obsolete inventory while the findings still shape the peg, not while the buyer's accountants are using them to shrink your proceeds. Clean, reconciled monthly closes for the trailing twelve months are the raw material every peg calculation feeds on; gaps and plug figures in those months become disputes later.
2. Define the target by reference, not by number
Never let "Target Working Capital" be a naked dollar figure. Insist that the definition points to a schedule attached to the agreement: the specific financial statements and monthly balances the target was computed from, account by account. That schedule is what makes the comparison apples-to-apples — the buyer's accountants can see exactly which treatments produced the number, and the agreement can require the same treatments at closing.
3. Negotiate the accounting standard as a hierarchy
Buyers will push for "GAAP." Sellers often counter with "past practice." The market compromise that protects you is a defined hierarchy: the closing statement is prepared in accordance with GAAP applied consistently with the target company's historical accounting practices as reflected in the scheduled financial statements — with named exceptions for the specific items both sides agree to treat differently. Whatever the formulation, the essential feature is symmetry: the target and the closing balance sheet must be computed under the same rules, and the agreement should say explicitly that the target is restated if the closing methodology differs.
4. Pin down exactly what counts
Attach a second schedule listing every account included in working capital — and just as important, what is excluded. Cash, debt, income taxes, transaction expenses, and related-party balances are the usual exclusions, but "usual" is not a contract term until you write it down. Call out the treatment of accrued bonuses, vacation, warranty reserves, customer deposits, and deferred revenue individually. Then negotiate the collar: a 5% band around the target absorbs rounding-level noise, while dollar-for-dollar adjustment above the band keeps real shortfalls meaningful. Know which one you are signing.
5. Control the closing statement process
The agreement's timetable is part of the economics. Typical terms give the buyer 60 to 90 days after closing to deliver objections to your closing statement, then give you about 30 days to respond — so calendar the entire sequence before you sign. Push for prompt access rights to the books you need to defend your numbers, a tight definition of what the independent accountant may decide (accounting questions only, not legal reinterpretation of the agreement), and an escrow sized to plausible adjustments rather than the buyer's worst case.
Clean Monthly Closes Are Your Best Defense
Strip away the legal machinery and the lesson is a bookkeeping lesson. The seller in the example lost $1.1 million not because the business was worth less, but because twelve months of informal accounting — gross receivables, unreserved inventory, missing accruals — gave the other side's accountants a restatement they could not answer. A business with disciplined monthly closes, aged receivables with real reserves, counted inventory with real write-downs, and accrued liabilities booked every month simply has less surface area for a post-closing ambush.
That discipline also pays off long before any sale: the same clean trailing-twelve-month records that support your peg are what lenders, investors, and auditors ask for first. If your books cannot currently produce a trustworthy working capital balance for each of the last twelve month-ends, that is the project to start this quarter — whether or not a buyer ever calls. Your fava dashboards and monthly review habits are where that readiness is built, one close at a time.
Keep Your Books Sale-Ready from Day One
Whether you sell next year or never, maintaining clear, reconciled financial records is what turns a working capital negotiation from a trap into a formality. Beancount.io provides plain-text accounting that gives you complete transparency and control over your financial data — no black boxes, no vendor lock-in. Get started for free and see why developers and finance professionals are switching to plain-text accounting.
