Working Capital Mechanism in M&A: Setting the Peg and Defining the Adjustment

The working capital mechanism is one of the most commercially significant elements of an M&A transaction. It ensures the buyer acquires the business with a normalized level of working capital, neither inflated by the seller running up receivables before closing nor depleted by aggressive cash extraction.

For Transaction Services teams, the working capital analysis directly determines the purchase price adjustment. Getting the peg wrong, or failing to identify manipulation in the completion balance sheet, has a direct financial impact on the client.

How the Mechanism Works

The working capital mechanism operates in three steps:

1. Define the components of net working capital for the transaction (which balance sheet items are included and excluded)
2. Set the peg: Determine the normalized level of working capital the business requires to operate (the "target" or "peg" amount)
3. Calculate the adjustment: At completion, compare actual working capital to the peg. If actual exceeds the peg, the buyer pays the difference. If actual is below the peg, the seller pays.

The economic logic is straightforward: the enterprise value reflects the business with a normal level of working capital. Any deviation at closing is a price adjustment, not a windfall for either party.

Defining Net Working Capital

The first analytical challenge is defining which balance sheet items comprise net working capital for the transaction. There is no single standard definition. The classification depends on the deal terms and the target's business model.

A typical NWC definition includes:

Current assets:

• Trade receivables (net of provisions)
• Inventory (raw materials, work-in-progress, finished goods)
• Prepaid expenses and accrued income
• VAT and other tax receivables (if operational)

Current liabilities:

• Trade payables
• Accrued expenses and deferred income
• Customer deposits and advances
• VAT and other tax payables (if operational)

Typically excluded (classified in net debt or treated separately):

• Cash and cash equivalents
• Financial debt (current portion)
• Tax provisions and corporate income tax payable
• Dividend payables
• Deferred consideration

The boundary between working capital and net debt is a negotiation point. Items like deferred revenue, supplier financing arrangements, and certain provisions can legitimately be classified either way. The advisory team must ensure consistency between the NWC and net debt analyses.

Setting the Peg

The peg is typically set as the average of the target's net working capital over a representative period, most commonly the trailing 12 months. The analytical work involves:

Monthly NWC Calculation

Calculate net working capital for each month over 24 to 36 months. This requires monthly balance sheet data at the account level, which in turn requires the trial balance data to be properly imported and mapped for each period.

Seasonality Assessment

Many businesses exhibit significant working capital seasonality. A retailer may have materially different inventory and payable positions in December versus June. A construction company's receivables peak during the building season.

The peg must reflect this seasonality. Using a simple 12-month average may understateor overstate the normalized requirement depending on where in the seasonal cycle the transaction closes. Some transactions use a seasonally-adjusted peg or a monthly peg schedule that varies with the time of year.

Normalizing Adjustments

The historical NWC data must be adjusted for items that do not reflect the normal operating level:

• One-time items: Unusual receivables, inventory build-ups for specific orders, exceptional accruals
• Accounting changes: Shifts in provisioning policy or revenue recognition that affect the trend
• Growth effects: A rapidly growing business may show an increasing NWC trend that needs to be considered in the peg

Period Selection

The choice of reference period is commercially sensitive. Sellers prefer a period where working capital was at its lowest (reducing the peg and minimizing the price reduction at closing). Buyers prefer a higher peg. The advisory team's role is to provide an objective assessment of the normalized level based on the data.

Data Requirements

Working capital analysis is one of the most data-intensive due diligence workstreams. It requires:

• Monthly trial balance data for the entire analysis period (typically 24-36 months)
• Account-level detail to correctly classify each balance into NWC, net debt, or excluded categories
• Sub-ledger detail for major working capital items (trade receivables aging, inventory breakdown, payables aging)
• Understanding of the target's billing and collection cycles, procurement terms, and inventory management practices

The account mapping must be precise. A single GL account misclassified from net debt to working capital (or vice versa) shifts the peg and creates a corresponding price adjustment. On a business with 50M EUR of gross working capital, even a 2 percent misclassification creates a 1M EUR pricing discrepancy.

The Completion Balance Sheet

At deal close, the buyer and seller agree on a completion balance sheet that measures actual working capital against the peg. This triggers the price adjustment.

The completion balance sheet must be prepared on the same basis as the peg. If the peg was set using specific account classifications and normalizing adjustments, the same methodology applies to the completion calculation. Any inconsistency creates a dispute.

This is where audit trail discipline is essential. The methodology used to set the peg must be clearly documented so that the same approach can be replicated at completion, potentially months later by different people.

Practical Impact

Working capital adjustments on mid-market transactions routinely range from 500K to 5M EUR. The analytical work that determines the peg is therefore directly material to the purchase price. The teams that produce clean, well-documented working capital analyses with clear methodology and granular data support protect their clients' economic interests and reduce post-closing dispute risk.