Locked Box vs Completion Accounts in M&A India 2026: Purchase Price Mechanism & Worked Example

Locked box vs completion accounts in M&A India is fundamentally a choice about how the purchase price moves between signing and closing. A locked-box mechanism fixes the equity value by reference to an agreed historical balance sheet date and protects the buyer mainly through leakage controls. Completion accounts instead calculate or true-up price using financial information at or around closing, usually through agreed definitions of cash, debt and working capital. For CFOs, founders, buyers and transaction teams, the right mechanism depends less on labels and more on the quality of the accounts, transaction timetable, volatility of the business and the precision of the sale agreement.

Locked Box vs Completion Accounts in M&A India: the direct answer

A locked box gives greater price certainty at signing because the economic value is anchored to a historical locked-box date. The seller generally bears economic risk up to that date and the buyer takes the economic benefit from that date onward, subject to the sale agreement. The key diligence question becomes whether value has leaked to the seller or connected persons after the locked-box date. Completion accounts shift more of the pricing exercise to closing: the parties agree an enterprise value or headline price, then adjust equity value using closing cash, debt, debt-like items and, commonly, normalized working capital.

Neither mechanism is automatically superior. In professional practice, a locked box can be efficient when accounts are reliable and the business is relatively stable. Completion accounts can be more defensible when cash, debt, inventory, receivables or working capital can move materially before closing. The commercial drafting and financial definitions must work together.

Why this is a real transaction issue, not just deal terminology

Public Indian corporate filings show that locked-box mechanics are used in substantial transactions. In a BSE filing dated 2 September 2025, Sudarshan Chemical Industries described an acquisition structure under which economic benefits and obligations attached from a 31 May 2024 locked-box date. A BSE filing dated 10 September 2025 concerning a proposed Molycop acquisition stated that the upfront consideration was determined using a locked-box approach based on an unaudited 30 June 2025 balance sheet, with customary adjustments to be agreed in the purchase agreement. GE Power India disclosures have also described business transfers based on locked-box accounts and post-closing settlement of leakage items. These examples demonstrate market use; they do not create a universal statutory formula for every Indian M&A transaction.

How a locked-box purchase price mechanism works

The buyer and seller first agree an enterprise value and identify a historical financial date—the locked-box date. The balance sheet at that date is used to establish the equity-value bridge. From there, the agreement defines permitted leakage and prohibited leakage. Common leakage concepts include dividends, distributions, shareholder payments, non-arm’s-length management charges, transaction bonuses funded by the target for the seller’s benefit, waiver of seller-related receivables, or transfers of value to connected parties. The exact definition is contractual and transaction-specific.

The buyer therefore needs high confidence in the locked-box accounts. Financial due diligence should test cash, borrowings, debt-like items, working capital, related-party balances, unusual payments and the integrity of the cut-off. A weak historical balance sheet can turn apparent price certainty into a dispute about what was actually inside the box.

How completion accounts work

Under completion accounts, the sale agreement usually contains definitions and accounting principles for the closing balance sheet. A preliminary or estimated price may be paid at closing and then adjusted after the closing accounts are prepared and reviewed. The adjustment can include closing cash, financial debt, debt-like liabilities and actual working capital compared with an agreed target.

This approach can better capture a changing business, but it increases post-closing calculation risk. Disputes often arise not because the arithmetic is difficult, but because definitions are vague: whether a liability is debt-like or working capital, whether restricted cash is cash-like, whether overdue receivables belong in normalized working capital, whether provisions are already reflected in EBITDA, or whether a balance is being counted twice.

Worked example: same enterprise value, different price mechanics

Assume an illustrative enterprise value of ₹500 crore. At the agreed reference date, the target has ₹70 crore of financial debt, ₹15 crore of debt-like items and ₹25 crore of unrestricted cash. The illustrative locked-box equity value would therefore be ₹440 crore before any other specifically agreed adjustments: ₹500 crore less ₹85 crore of debt and debt-like items plus ₹25 crore cash.

Now assume the transaction closes three months later. If the deal uses a locked box, the ₹440 crore base equity value may remain fixed, but the buyer would investigate any prohibited leakage between the locked-box date and closing. If ₹6 crore of prohibited leakage is identified and the agreement provides a rupee-for-rupee remedy, the economic settlement would reflect that amount.

Under a completion-accounts mechanism, suppose closing net debt and debt-like items rise by ₹8 crore and actual normalized working capital is ₹5 crore below the agreed target. Subject to the contractual definitions, the final equity consideration could reduce by ₹13 crore. These numbers are purely illustrative; they are not market benchmarks or mandatory adjustment rules.

Locked box vs completion accounts: practical comparison

Price certainty: locked box is generally stronger at signing; completion accounts intentionally preserve a later true-up. Financial information: locked box relies heavily on the quality of historical reference accounts; completion accounts rely on the ability to prepare reliable closing accounts. Working-capital volatility: completion accounts can capture movements directly; a locked box requires the agreed price and diligence to absorb more of that risk. Leakage monitoring: central to a locked box; less central in a conventional completion-accounts structure. Post-closing disputes: a locked box can reduce broad closing-balance-sheet disputes but may create leakage disputes; completion accounts can create disputes around definitions, accounting policies and closing calculations.

What financial due diligence should test before choosing the mechanism

• Quality of earnings: determine whether reported EBITDA needs normalization and whether one-off costs or revenues distort the valuation base.

• Net debt: identify bank debt, shareholder loans, accrued interest, lease-related treatment where relevant, overdue statutory liabilities and other debt-like items.

• Working capital: establish seasonality, historical averages, structural changes and whether a target working-capital level is commercially sensible.

• Cash quality: separate unrestricted operating cash from restricted, trapped or operationally required balances.

• Related parties: reconcile balances, management charges, advances, guarantees and payments that could become leakage concerns.

• Cut-off and balance-sheet integrity: test revenue, receivables, inventory, payables, provisions and subsequent settlements around the reference date.

Common transaction mistakes

The first mistake is treating ‘locked box’ as synonymous with ‘fixed price’. The price can still be affected by leakage remedies, interest-like value accrual, permitted distributions or other negotiated mechanics. The second is importing generic net-debt definitions without testing the target’s actual liabilities. The third is allowing the same item to reduce price twice—for example once through normalized EBITDA and again as a debt-like item. The fourth is selecting a working-capital target without considering seasonality. The fifth is failing to align the financial model, due-diligence report and sale agreement definitions.

CFO and transaction-team checklist

Before signing, prepare a single purchase-price bridge that reconciles enterprise value to equity value under the exact contractual definitions. Maintain a schedule of cash, debt, debt-like items, working capital and related-party balances. For a locked box, create a leakage register covering the period from the locked-box date to closing, including permitted leakage approvals. For completion accounts, agree accounting policies, hierarchy of GAAP versus specific deal rules, preparation timelines, review rights, dispute thresholds and the independent-expert mechanism before the deal is signed—not after a disagreement appears.

Where CA-led transaction advisory adds value

A CA-led diligence team can connect the historical accounts to the actual purchase-price mechanism. The work is not merely verifying balances. It involves identifying economic debt, testing cash convertibility, assessing normalized working capital, reconciling related-party movements, reviewing leakage risk and building a defensible equity-value bridge that transaction counsel can translate into the sale agreement. Legal drafting remains the responsibility of the relevant legal advisers; financial diligence supports the numbers and definitions on which that drafting depends.

Related PGT & Associates transaction-advisory guides

Working Capital Normalization in M&A India: https://www.pgtandassociates.com/post/working-capital-normalization-ma-india

Net Debt in Financial Due Diligence India: https://www.pgtandassociates.com/post/net-debt-financial-due-diligence-india

Enterprise Value to Equity Value Bridge India: https://www.pgtandassociates.com/post/enterprise-value-to-equity-value-bridge-india

Frequently asked questions

Is a locked box mandatory in Indian M&A?

No. A locked box is a negotiated purchase-price mechanism. Transaction structure, applicable law, regulatory approvals, tax consequences and accounting treatment need separate analysis for the specific deal.

Does a locked box eliminate purchase price adjustments?

Not necessarily. It typically reduces reliance on broad closing-account true-ups, but the sale agreement can still provide adjustments or remedies for leakage and other specifically agreed matters.

When are completion accounts more useful?

They can be useful where the business is volatile, the gap between signing and closing is meaningful, net debt can move substantially, or working capital is seasonal or difficult to lock reliably at an earlier date.

What is the biggest financial risk in completion accounts?

Ambiguous definitions. A technically correct closing balance sheet does not prevent a pricing dispute if the agreement is unclear about debt-like items, cash-like items, working capital or accounting-policy hierarchy.

Practical takeaway

For most transactions, the key question is not ‘locked box or completion accounts?’ in isolation. It is whether the financial information, diligence findings and sale-agreement definitions produce a purchase price that behaves as the parties intend. PGT & Associates can support promoters, CFOs, buyers and transaction teams with financial due diligence, net-debt and working-capital analysis, purchase-price bridges and transaction-data-room review. This is professional advisory support and does not constitute legal, investment or transaction-completion assurance.

Sources and market evidence

BSE corporate filing, Sudarshan Chemical Industries, 2 September 2025: https://www.bseindia.com/xml-data/corpfiling/AttachLive/a93e2bc8-4e6c-4183-bad2-a4032694b214.pdf

BSE corporate filing concerning Molycop proposed acquisition, 10 September 2025: https://www.bseindia.com/xml-data/corpfiling/AttachLive/0de3d287-d008-4b46-a213-f75d8a6de0a8.pdf

BSE corporate filing, GE Power India: https://www.bseindia.com/xml-data/corpfiling/AttachHis/200e5fa5-982c-4e72-8ff8-e1d554a20139.pdf