Completion Accounts

The dominant US M&A pricing mechanism: the purchase price is adjusted after closing based on the actual balance sheet at the closing date, measuring working capital, cash, and debt. Completion accounts are contrasted with the locked box mechanism (common in European deals) where price is fixed pre-close. Most US SMB deals use completion accounts — see [Working Capital Adjustment](#working-capital-adjustment) and [Post-Closing Adjustment](#post-closing-adjustment) for detailed mechanics.

Last updated: April 2026

Full Definition

Completion accounts (the UK and international term for what US practitioners typically call "closing date accounts" or the "closing balance sheet") is the post-closing mechanism that adjusts the purchase price based on the actual financial position of the business on the closing date, compared to a reference point agreed at signing. The mechanism ensures the buyer receives the business with the agreed financial position — neither more nor less value than what was negotiated.

How completion accounts work: The purchase price is typically set assuming the business will be delivered with a "target" level of net working capital, net debt, and other agreed metrics. After closing, the seller prepares completion accounts (a balance sheet as of the closing date) using the accounting policies specified in the purchase agreement. The buyer reviews these accounts and proposes adjustments. The parties negotiate any differences; unresolved disputes go to an independent accountant for binding determination. The final purchase price is then adjusted up or down based on how actual closing figures compare to the targets.

Locked box vs. completion accounts: The primary alternative to completion accounts is the "locked box" mechanism, more common in European PE transactions. Under a locked box, the purchase price is fixed based on a historical balance sheet (the "locked box date"), and no post-closing adjustment occurs. Instead, the seller's obligations to not "leak" value from the business between the locked box date and closing provide the buyer's protection. Completion accounts are more buyer-friendly (economic risk stays with seller until close); locked box is more seller-friendly (certainty of price, no post-close adjustment risk).

Common adjustment items: The most frequently adjusted items in completion accounts include: working capital (accounts receivable, inventory, accounts payable — ensuring the business arrives with appropriate liquidity); net debt (outstanding debt and debt-like items that are paid off at close, plus any excess cash retained by the business); and specific items negotiated deal-by-deal (deferred revenue treatment, accrued liabilities, earnouts, pension deficits).

Accounting policy disputes: Completion accounts adjustments generate significant litigation because both parties have incentives to argue for accounting treatments that move the adjustment in their favor. The purchase agreement must specify accounting policies in exhaustive detail — GAAP vs. IFRS, specific revenue recognition policies, inventory valuation methods — to minimize dispute surface area.

Seller vs. Buyer Perspective

If you're selling

Completion accounts adjustments are one of the most common post-close disputes in M&A. Protect yourself by ensuring the purchase agreement specifies accounting policies in precise detail and that the target working capital amount is calculated using the same methodology as the closing accounts. Run a "mock closing" calculation well before the closing date to identify any unexpected gaps between your expected and actual working capital position. Sellers who wait until closing to understand their working capital position often face unwelcome adjustments.

If you're buying

The completion accounts mechanism is your primary tool for ensuring you receive the business in the financial condition you paid for. Use it carefully: specify the accounting policies precisely, negotiate a working capital target based on a realistic average of historical periods (not a cherry-picked high point), and engage your accounting advisors early to review the seller's completion accounts submission. Challenge items that appear incorrectly classified — but focus your energy on material items, not minor accounting differences that cost more to dispute than they're worth.

Real-World Example

A buyer pays $8M for a business assuming a target net working capital of $1.1M. The purchase agreement specifies a dollar-for-dollar adjustment if closing working capital differs from the target. At closing, the seller submits completion accounts showing working capital of $860K — $240K below target. The buyer reviews the accounts, agrees with the methodology, and the seller pays a $240K post-closing adjustment (usually by reducing the escrow release or through a direct payment), bringing the effective purchase price to $7.76M.

Why It Matters & Common Pitfalls

  • !Working capital target must reflect the business's actual normalized needs. Using a single historical period as the target can produce a misleading baseline if that period was unusually high or low. Use a rolling 12-month average, adjusted for seasonality and any known one-time items.
  • !Accounting policy gaps are exploited by both sides. The party preparing the completion accounts (usually the seller) has an inherent advantage: they can apply accounting judgments in ways that favor their outcome. Counter this by specifying accounting policies precisely and requiring consistency with historical practice.
  • !Expert determination is final and non-appealable. When disputes are referred to an independent accountant for determination, that determination is typically binding and not subject to court review except for fraud or manifest error. Choose the expert determination process carefully — the rules governing the expert's mandate and process matter.
  • !Don't confuse debt-free cash-free with the completion accounts mechanism. 'Debt-free, cash-free' sets the pricing convention (seller retains cash, pays off debt at close). Completion accounts adjusts the actual financial position delivered. Both apply simultaneously — understand how they interact in your specific deal structure.

Frequently Asked Questions

What are completion accounts?
Completion accounts (or closing accounts) adjust the purchase price post-close based on the actual balance sheet at the closing date. It's the dominant US M&A pricing mechanism, contrasted with the locked box approach where price is fixed pre-close.
Are completion accounts or locked box better for sellers?
Locked box provides more certainty (price fixed at signing), which sellers often prefer. Completion accounts can produce either adjustments — positive if WC exceeds peg, negative if below. Neither is universally better; the preferred mechanism depends on business stability and negotiating position.

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Disclaimer: The information provided on this page is for educational and informational purposes only. It should not be considered financial, legal, or investment advice. Business valuations depend on many factors specific to each situation. Always consult with qualified professionals — including business brokers, CPAs, and M&A attorneys — before making acquisition or sale decisions. LegacyVector is not a licensed broker, financial advisor, or attorney. Data shown may be based on limited samples and may not reflect current market conditions.

LV

LegacyVector Research Team

Reviewed by M&A professionals · Updated April 2026