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FinanceBackground · 5 min read · LUCID

The cash asleep on your shelves: what your stock really costs

A well-stocked warehouse is reassuring. It shouldn't be. Every euro tied up in stock is a euro of cash the company cannot use to pay, invest or grow, and that euro has a cost: invisible, but very real. In a country where insolvencies are breaking records and where short-term financing remains expensive, dormant stock and uncollected receivables form a silent trap that strangles growing SMEs. The good news: that cash can be recovered.

A proud leader takes you round the warehouse. The racks are full, the range is broad, everything is immediately available for the customer. To him, it is a sign of solidity. To his banker, and to his cash position, it is something else: a mountain of cash frozen in goods that, for as long as they remain unsold, earn nothing and cost something every day. Stock is not a quiet asset. It is cash in a form that sleeps, goes out of fashion, spoils, and has to be financed.

The working capital requirement, that trap of growth

Behind this phenomenon sits an indicator that too many leaders ignore or underestimate: the working capital requirement, the WCR. Its formula is simple: stock, plus customer receivables not yet collected, minus supplier debts not yet paid. That amount is the cash the company must permanently advance to keep its activity turning, between the moment it pays for its purchases and the moment it collects on its sales. The trap is cruel: the more an SME grows, the bigger its working capital requirement, because more stock and more receivables are needed to support more sales. A company can therefore go under in the middle of a growth phase, strangled by a cash need rising faster than its collections.

Key figures
  • WCR =stock + customer receivables − supplier debts: the working capital requirement the company advances permanently
  • 11,665insolvencies in Belgium in 2025, a record since 2013, often through cash strain (Statbel)
  • 1 in 4insolvencies linked to late payment, a direct component of the working capital requirement (Graydon)

The hidden cost of stock, line by line

Many leaders see nothing in stock but its purchase value. Yet its real carrying cost is far higher. First there is the cost of financing: money tied up is either borrowed, and bears interest, or denied another profitable use. Then there is the cost of space, of handling, of insurance. Then there is the risk of obsolescence and damage, those items that go out of fashion or deteriorate before they are sold. Added together, these costs mean that excess stock eats into the margin in silence, month after month. The question is never only what my stock is worth, but what it costs me to keep it.

« An over-full warehouse isn't security, it is cash held prisoner. The right stock isn't the biggest, it is the most accurate. »
LUCID principle

Not all stock is equal: the rule of priorities

Good stock management doesn't mean cutting everything blindly, at the risk of running out of the very items that keep the company turning. It means treating each item according to its real weight. A small share of items almost always accounts for the bulk of sales and value: those you watch closely, and never run out of. At the other end, a multitude of marginal items ties up cash for negligible turnover: those you rationalise, reduce, sometimes drop altogether. That simple sorting, applied with method, often releases a significant share of cash without losing anything in customer service. Accurate stock beats big stock.

The other two taps: receivables and suppliers

Stock is only one third of the equation. Customer receivables are another, and it is a line on which Belgian SMEs leave fortunes asleep: invoice fast, set clear payment terms, chase without embarrassment from the very first day of delay. Every day of credit granted is a day of cash lent to the customer free of charge. The third lever is supplier debt: negotiating reasonable payment terms lets your suppliers finance part of the cycle, within the Belgian legal framework. Acting on all three taps at once, stock, receivables and suppliers, is the fastest and cheapest way to release cash without borrowing a single euro.

The cash is asleep in your own house: wake it up

Most SMEs look for financing outside when part of the solution is inside, tied up in a poorly managed working capital requirement. Acting on stock, on receivables and on supplier terms costs almost nothing and releases cash that is available immediately, with no interest to repay. Against a backdrop of record insolvencies and expensive credit, this sleeping cash is not a management detail: it is sometimes the difference between healthy growth and growth that strangles. The most profitable stock isn't the most reassuring to look at. It is the most accurate.

Sources

Definition and calculation of the working capital requirement (stock + receivables − supplier debts): standard financial reference sources and the working capital calculator of Belfius (Belgian bank) · Statbel, “11,665 insolvencies in 2025”, a record since 2013 · Graydon, a quarter of insolvencies linked to late payment · Principles of stock classification by importance (the Pareto method applied to stock items) · Belgian legal framework on payment terms (the Act of 2 August 2002, as amended) · LUCID field observations, logistics assignments 2025-2026, references anonymised.

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