Working-Capital Adjustments and Earn-Outs in a Business Purchase, Explained

The headline price in a business purchase agreement (APA) is rarely the price that actually changes hands. Two mechanisms—the working-capital adjustment and the earn-out—can move the real number significantly, sometimes months or years after closing. They are also two of the most disputed terms in M&A, because each depends on definitions, accounting judgment, and assumptions about the future.

If you are buying or selling a small business, understanding how these clauses work is one of the highest-value things you can do before signing. This post explains the mechanics in plain language and points to where the disputes tend to start. (Not legal advice.)

The working-capital adjustment

Most deals are priced on a "cash-free, debt-free" basis with a normal level of working capital delivered at closing. Working capital here usually means current assets (receivables, inventory, prepaids) minus current liabilities (payables, accrued expenses)—the operating cushion a business needs to keep running the day after the sale.

The adjustment is a post-closing true-up against a target, often called the peg or working-capital target:

• The parties agree on a peg before closing (frequently a trailing average of the business's normal working capital).
• At closing, the buyer pays based on an estimate.
• After closing, the actual closing-date working capital is calculated and compared to the peg.
• If actual working capital is above the peg, the buyer typically pays the seller the difference. If it is below, the purchase price is reduced and the seller refunds the shortfall.

So even after the deal "closes," the price can still move. A seller who lets receivables pile up uncollected, or runs inventory down to nothing, can trigger a meaningful swing.

Where working-capital disputes start

• The peg itself. Set it too high and the buyer overpays; too low and the seller leaves money behind. How the trailing average is calculated matters enormously.
• Accounting methods. Was the peg built on GAAP, on the target's historical practices, or some hybrid? If the closing statement uses a different method than the peg, the comparison is apples-to-oranges.
• Judgment items. Reserves for bad debt, obsolete inventory, and warranty accruals all involve estimates—and estimates are where reasonable people disagree.
• The dispute mechanism. Most APAs route true-up disagreements to a neutral accounting firm whose decision is binding. Watch the timelines, the cost-sharing, and whether the expert can only pick between the two parties' numbers or set its own.

The earn-out

An earn-out is a deferred payment tied to future performance. Instead of paying the full price at closing, the buyer agrees to pay more later if the business hits agreed milestones—revenue targets, EBITDA thresholds, customer retention, product launches, or regulatory approvals.

Earn-outs exist to bridge a valuation gap: the seller believes the business is worth more than the buyer will pay up front, so the extra value is made contingent on the business actually delivering. Used well, they align both sides. Used carelessly, they are a reliable source of litigation.

Why earn-outs spawn disputes

• Accounting methods. If the milestone is EBITDA-based, every cost allocation matters—management fees, shared services, overhead pushed down from a parent. A buyer can depress earn-out metrics through ordinary post-closing accounting choices.
• Control of the business post-closing. After the sale, the buyer runs the company. Decisions about pricing, headcount, R&D spend, or integration can all affect whether milestones are met—and the seller no longer holds the levers. Strong earn-outs include covenants about how the business will be operated during the earn-out period.
• Milestone definitions. "Revenue" sounds simple until you ask: gross or net? Recognized when? Does a product the buyer cross-sells through its own channel count? Ambiguity here is the single biggest driver of earn-out fights.
• Time horizon and acceleration. What happens if the buyer resells the business mid-earn-out, or sunsets the product line? Without acceleration or protection language, the earn-out can quietly evaporate.

The related APA terms that interact with both

Working capital and earn-outs do not live in isolation. Several other clauses shape how much risk each side actually carries:

• Reps and warranties. The seller's factual promises about the business (financials, contracts, litigation, taxes). Their accuracy underpins the whole deal.
• Survival periods. How long after closing the buyer can bring a claim for a breached rep. Fundamental reps often survive longer than general ones; some may end sooner than buyers expect.
• Indemnification: caps, baskets, and escrow. A cap limits the seller's total exposure. A basket (or deductible) sets a threshold before claims can be made at all. An escrow holds back part of the price to fund potential claims. These define what a breach is actually worth in dollars.
• Assumed vs. excluded liabilities. Which obligations transfer to the buyer and which stay with the seller. A liability you didn't realize you assumed can dwarf any price adjustment.

Read together, these terms answer the real question: if something goes wrong, who pays, how much, and for how long?

Practical advice

• Define the peg and the accounting method precisely. State exactly how working capital is calculated, on what accounting basis, and confirm the closing statement uses the same method. Attach a sample calculation to the agreement.
• Tie earn-out milestones to objective, measurable metrics. Favor metrics that are hard to manipulate and clearly defined. Spell out the accounting conventions and add operating covenants so the buyer can't engineer a miss.
• Watch the survival periods and indemnity terms. Make sure the survival window, caps, baskets, and escrow actually match the risks you care about—and that they line up with the true-up and earn-out timelines.
• Model the downside, not just the headline. Run the numbers on what you pay or receive if working capital comes in low, or the earn-out hits only partway.

This is high-stakes—use AI as a pre-screen

Purchase-agreement terms carry real money and real risk, and they vary by deal structure, industry, and jurisdiction. AI is a strong pre-screen: it can surface where the peg, accounting method, milestone definitions, survival periods, and indemnity caps live in your draft, flag vague or one-sided language, and help you walk into a negotiation knowing what to ask. It is not a substitute for experienced deal counsel on a transaction this size.

To go deeper, see our pillar guide on business purchase agreement review, the comparison of business purchase: AI vs. an M&A attorney, and the clause library for plain-language explanations of individual terms.

When you're ready for a fast first pass, analyze your purchase agreement.