What Is a Purchase Price Adjustment? The 2026 Guide to Closing Adjustments

“The headline price is what you negotiate; the purchase price adjustment is what reality does to it. A business doesn’t stand still between LOI and closing — and the adjustment is the mechanism that settles up.”

Key Takeaways

• A purchase price adjustment changes the final price based on the business’s actual condition at closing.
• The most common adjustments are for working capital and net debt.
• Adjustments can move the final price up or down from the LOI’s headline number.
• They exist because a business changes constantly — cash, receivables, payables, and debt all move.
• Adjustments are typically settled through a post-closing ‘true-up’ against agreed targets.
• The locked box mechanism is an alternative that fixes the price with no post-closing adjustment.
• Price adjustments directly change the seller’s actual proceeds — they are not a detail to overlook.

Purchase Price Adjustment Defined

For 2026 AR closing mechanics and working capital target math, see our AR closing mechanics guide.

A purchase price adjustment is a contractual mechanism that changes the final purchase price of a business based on the actual condition of the company at the time of closing.

The headline price — the number agreed in the letter of intent and the purchase agreement — is set with certain assumptions about the state of the business: that it will be delivered with a normal level of working capital, a certain level of debt, a certain amount of cash. But the business keeps operating right up until closing, and its actual condition at the closing date won’t match those assumptions perfectly.

The purchase price adjustment reconciles the difference. It compares the actual condition of the business at closing against the assumptions baked into the price, and adjusts the final amount accordingly — up or down — so the buyer gets what they paid for and the seller is fairly settled.

Why Purchase Price Adjustments Exist

Purchase price adjustments exist because of a simple, unavoidable fact: a business is a moving target.

Between the day the price is agreed and the day the deal closes — often weeks or months — the business keeps operating. Cash comes in and goes out. Receivables are collected and new ones created. Inventory is bought and sold. Payables accrue and get paid. Debt is drawn and repaid. The business at closing is not the business as it was when the price was set.

Without an adjustment mechanism, this creates problems and perverse incentives. A seller could strip cash out of the business before closing, or stop collecting receivables, or let inventory run down — delivering the buyer a depleted business at the full price. Or the business could naturally build up extra working capital that the seller, having agreed a fixed price, wouldn’t be compensated for.

The purchase price adjustment solves this. It pins the price to the business’s actual condition at closing, ensuring the buyer receives the business in the expected state and the seller is fairly credited or charged for any difference. It removes the incentive to game the gap between agreement and closing.

The Common Types of Purchase Price Adjustment

Purchase price adjustments come in a few standard forms, each addressing a different way the business’s condition can differ from what the price assumed.

Working Capital Adjustment

The most common adjustment. The parties agree a ‘target’ level of working capital — typically based on the business’s normal historical average. At closing, actual working capital is measured. If it’s above target, the seller delivered extra operating capital and the price adjusts up. If below, the price adjusts down.

Net Debt Adjustment

Most deals are done ‘cash-free, debt-free.’ The price adjusts for the actual cash and debt in the business at closing — the seller keeps the cash and clears the debt, and the price is trued up for the actual net debt figure.

Other Closing Adjustments

Depending on the deal, adjustments can also cover specific items — prepaid expenses, deferred revenue, transaction costs, or other defined items the parties agree should be reconciled at closing.

How a Purchase Price Adjustment Is Calculated

The mechanics of a typical purchase price adjustment — focusing on the working-capital adjustment, the most common — work like this:

1. The parties agree, in the purchase agreement, a ‘target’ (often a working-capital peg based on the business’s historical average)
2. They also agree the precise methodology for measuring the relevant figure
3. At or shortly before closing, an estimated figure is used to set the price paid at closing
4. After closing, the actual figure as of the closing date is determined — through ‘completion accounts’ or ‘closing accounts’
5. The actual figure is compared to the agreed target
6. If the actual figure is above target, the price adjusts up — the buyer pays the seller the difference
7. If below target, the price adjusts down — the seller pays the buyer the difference
8. This post-closing reconciliation is the ‘true-up’

The True-Up: Settling the Adjustment After Closing

Most purchase price adjustments are settled through a post-closing process called the ‘true-up.’ For pricing-strategy specifics, our walkthrough on how to find the selling price of a business covers the three-method approach.

Here’s why a true-up is needed: the precise actual condition of the business as of the exact closing date can’t always be known on the closing day itself. The final numbers — actual working capital, actual net debt — take time to determine accurately.

So the deal typically closes using an estimate, and then, after closing, the actual figures are calculated through completion accounts. The difference between the estimate used at closing and the actual figure is the true-up — a final payment, one direction or the other, that settles the adjustment.

The true-up is a common source of post-closing disputes, because it involves preparing and agreeing accounts after the deal has closed. Clear methodology, agreed in advance in the purchase agreement, and a defined dispute-resolution process are what keep the true-up from becoming a fight. This is one reason the methodology for the adjustment should be negotiated carefully and precisely in the agreement.

Purchase Price Adjustments and the Locked Box Alternative

Purchase price adjustments are the standard ‘completion accounts’ approach — but they’re not the only way to handle the moving-target problem. The alternative is the locked box mechanism.

Two Ways to Solve the Same Problem

Both approaches address the moving-target problem. The purchase price adjustment trues up the price after closing to the actual figures. The locked box fixes the price on a historical balance sheet and prohibits the seller from extracting value in the interim. Which approach a deal uses is negotiated — and should be settled early, ideally in the LOI.

Why Purchase Price Adjustments Matter to a Seller

For a seller, purchase price adjustments are not a technical footnote — they directly change what you actually receive. Here’s why they deserve real attention:

Adjustments move the final number. A working-capital adjustment alone can swing the price by a meaningful amount in either direction. The headline price you negotiated is not necessarily the number that lands in your account — the adjustment determines the final figure.

The target is negotiated, and where it’s set matters. The working-capital target (the peg) is a negotiated number. If it’s set too high, the seller has to deliver more working capital and effectively receives less. If it’s set fairly, the adjustment is neutral. Sellers should model their normal working capital carefully and negotiate the target deliberately.

The methodology is negotiated, and ambiguity gets exploited. How working capital is defined and measured — what’s included, what’s excluded — is a negotiated point. Vague methodology becomes a post-closing fight. Precise methodology protects the seller.

Lock the adjustment terms early. The price adjustment mechanism, the target, and the methodology should be settled at the LOI stage, not left to be worked out later. The terms negotiated at LOI typically carry into the final agreement — so what’s agreed there matters.

How Sellers Should Approach Purchase Price Adjustments

Practical guidance for handling purchase price adjustments well:

• Understand that the headline price is not the final number — the adjustment changes it
• Model your business’s normal working capital before negotiating, so you know what a fair target looks like
• Negotiate the working-capital target (peg) deliberately — it directly affects your proceeds
• Negotiate the measurement methodology precisely — define what’s in and out, leaving no ambiguity
• Settle the adjustment mechanism and terms at the LOI stage, not later
• Understand the true-up process and the dispute-resolution path before signing
• Consider whether a locked box would suit the deal better than completion-accounts adjustments
• Use experienced M&A advisors and accountants — adjustments are technical and the dollars are real

Conclusion

Frequently Asked Questions

What is a purchase price adjustment?

A purchase price adjustment is a contractual mechanism that changes the final purchase price of a business based on its actual condition at closing. It reconciles the headline price — set with certain assumptions — against how the business actually is at the closing date.

Why do purchase price adjustments exist?

Because a business is a moving target. Between the day the price is agreed and the day the deal closes, cash, receivables, payables, and debt all change. Adjustments pin the price to the business’s actual condition at closing and remove the incentive to game the gap.

What are the common types of purchase price adjustment?

The most common are the working-capital adjustment (truing up the price for actual working capital versus an agreed target) and the net-debt adjustment (for actual cash and debt in a cash-free, debt-free deal). Other defined items can also be adjusted.

Can a purchase price adjustment increase the price?

Yes. Adjustments move the price up or down. If, for example, the seller delivers more working capital than the agreed target, the price adjusts upward — the buyer pays the seller the difference.

What is the working-capital adjustment?

The working-capital adjustment compares the business’s actual working capital at closing against an agreed target (the peg). If actual is above target, the price adjusts up; if below, the price adjusts down. It’s the most common purchase price adjustment.

What is the true-up in a purchase price adjustment?

The true-up is the post-closing process that settles the adjustment. The deal typically closes using an estimate, then the actual figures are determined through completion accounts. The difference between the estimate and the actual figure is settled with a true-up payment.

How is a purchase price adjustment calculated?

The parties agree a target and a measurement methodology in the purchase agreement. At closing, an estimate sets the price paid. After closing, the actual figure is determined through completion accounts and compared to the target; the difference is settled via the true-up.

What’s the difference between a purchase price adjustment and a locked box?

A purchase price adjustment trues up the price after closing to the business’s actual condition. A locked box fixes the price on a historical balance sheet with no post-closing adjustment. Both solve the moving-target problem; the locked box gives more certainty, the adjustment reflects the true closing position.

Why do purchase price adjustments matter to a seller?

They directly change what the seller receives. The headline price is not necessarily the final number — the adjustment can swing it meaningfully. The target and methodology are negotiated, and where they’re set directly affects the seller’s proceeds.

Can purchase price adjustments cause disputes?

Yes. The true-up involves preparing and agreeing completion accounts after closing, which can be a source of disputes. Clear methodology agreed in advance and a defined dispute-resolution process are what keep the true-up from becoming a fight.

When should purchase price adjustment terms be negotiated?

At the LOI stage, not later. The adjustment mechanism, the target, and the methodology should be settled early. The terms negotiated at the LOI typically carry into the final purchase agreement, so what’s agreed there matters.

How should a seller prepare for a purchase price adjustment?

Understand the headline price isn’t the final number, model the business’s normal working capital before negotiating, negotiate the target and methodology deliberately and precisely, settle the terms at LOI, understand the true-up process, and use experienced M&A advisors and accountants.