How seasonality in net working capital affects M&A deal price, NWC target negotiations and what FDD analysts must do to account for it.
Seasonality in Net Working Capital (NWC) is one of the most technically nuanced areas of Financial Due Diligence — and one of the most practically important. If the NWC target in the SPA does not properly reflect seasonal patterns, millions of euros can shift between buyer and seller in ways that neither party anticipated.
NWC fluctuates throughout the year in most businesses because:
For example, a toy manufacturer has high inventory in October and November (pre-Christmas production), high receivables in December (retailers buying), and lower NWC in January (collections, inventory depleted).
If a deal closes in December for a seasonal business, and the NWC target is simply the 31 December prior year balance, the buyer receives what appears to be "normal" NWC — but it is actually abnormally high due to the seasonal peak. When January arrives and NWC drops back to average levels, the buyer has over-received value.
Conversely, if a deal closes in January and the target is set at 31 December levels, the seller is required to deliver peak NWC into the business even though the cycle naturally unwinds after that date.
The first step is always to build a monthly NWC schedule over the last 24–36 months. This makes seasonal patterns immediately visible.
The most common methodology for the NWC target is the average of the last 12 months. This smooths out seasonal peaks and troughs and produces a representative "normal" level of NWC.
If closing is expected at a point that deviates significantly from the average, the FDD team may recommend an adjusted target that reflects the expected NWC at that specific closing date. This requires:
Within the seasonal history, the analyst must also identify structural shifts (new customers, changed payment terms, higher inventory requirements) that mean historical averages may not be representative of the future.
The NWC target negotiation is often one of the most contentious parts of the SPA process. Sellers prefer a lower target (less NWC to deliver at closing = higher equity proceeds). Buyers prefer a higher target (more NWC delivered at closing = more operational headroom post-acquisition).
A well-prepared FDD team can defend its proposed target with reference to:
Seasonality in NWC is not just a theoretical concept — it is a real deal negotiation battleground. FDD analysts who can model it clearly and argue it with data are genuinely valuable to deal teams.
The Transaction Services Interview Programme (€119.99, one-time) includes full NWC modules with seasonal analysis, Excel models and SPA negotiation scenarios. Enrol today.
Hundreds of candidates prepared their interviews with this programme. Those who landed the role have one thing in common: they worked the cases before walking into the room.
