What is a Net Working Capital Peg? Protecting Equity in a UK Business Sale

The 30-Second Definition

The Net Working Capital (NWC) Peg (or Target) is a benchmark level of current assets (such as inventory, trade debtors, and prepayments) minus current liabilities (such as trade creditors and accruals) that a seller must legally leave in the business at completion. In UK M&A, if your actual working capital at midnight on the closing date falls below this agreed "Peg", the buyer reduces your final purchase price pound-for-pound.

Why Corporate Buyers Insist on an NWC Peg

Most mid-market business owners focus exclusively on the Profit & Loss account. However, institutional buyers know that a business is a running engine that requires physical fuel to operate on Day 1 post-sale. If a seller strips out all the cash, collects every trade debt early, and leaves empty stock shelves right before handover, the business will collapse without an immediate injection of cash.

The NWC Peg prevents this scenario. It ensures that the company is handed over with a normal, healthy level of operational liquidity. The deal is usually structured as "Debt-Free, Cash-Free", meaning you take the surplus cash, but you must leave the working capital intact.

How the "Peg" is Negotiated (and the Seasonal Risk)

The Net Working Capital Peg is typically calculated using a 12-month rolling average of the business's balance sheets to smooth out short-term fluctuations. However, this poses a substantial trap for seasonal businesses:

- The Trap: If your business builds up massive stock levels in Autumn to prepare for Winter sales, a buyer may attempt to set the Peg using your peak operational month. This forces you to leave significantly more value in the company at completion without receiving a higher purchase price.

- The Solution: You must map out your rolling 12-month working capital cycle with your corporate finance advisors long before signing an Letter of Intent (LOI) to establish a fair, normalized baseline.

The Buyer’s Playbook: The Balance Sheet Price Chip

In the final weeks of due diligence within the Virtual Data Room, the buyer's forensic team will audit your balance sheet definitions. They will look for any opportunity to reclassify items to adjust the final payout:

- Aged Stock Write-Downs: Accountants will scan your inventory records. Any stock older than 90 or 180 days will be argued down to zero value, reducing your current assets and pushing you below the Peg level.

- Bad Debt Provisions: If you have invoices that are overdue, the buyer will insist they are excluded from the working capital calculation, meaning you don't get credited for them at completion.

- Reclassifying Tax Liabilities: Buyers will check that accrued corporation tax, VAT, and PAYE are correctly separated from standard working capital liabilities, ensuring they don't artificially distort the baseline.

Defend Your Closing Balance Sheet

Negotiating the working capital definitions in the Share Purchase Agreement (SPA) is often where the real battle for deal value takes place. Entering these discussions without an internal NWC model leaves you highly exposed to late-stage price deductions.