Enterprise Intelligence Group

The Dead-SKU Tax: What Slow Stock Really Costs — and How to Stop Paying It

It does not show up on an invoice, but a retailer can be paying it: the slow, near-duplicate, should-have-been-cut stock quietly costing shelf, capital and markdown dollars. How to see it, and how to stop paying.

A retailer can be paying a tax that never appears on an invoice: the dead-SKU tax.

It is the slow-moving stock that earned its shelf some time ago and has not moved since. The near-duplicate competing with itself. The line everyone means to cut "after this season." Individually, items like these may not trip any alarm the business has set. Together, they can be a steady drain.

What the tax actually costs

Slow SKUs don't just sit there — they charge rent, in three currencies:

• Shelf and space: the spot a faster seller could occupy, earning more per facing.
• Working capital: cash tied up in inventory that turns slowly, if at all.
• Markdowns: the eventual clearance, which can come later and at a worse price than if the decision had been taken when the signals first appeared.

None of it is dramatic; over time it can compound.

Why it lingers

Not laziness — volume. A genuine assortment review means pulling sales, margin, space productivity, and substitution data across hundreds of SKUs and dozens of stores. If that work depends on a category manager finding spare days alongside a full week, the review happens only as often as those days can be found. Between reviews, a SKU that has stopped earning its place may continue holding shelf, capital and markdown exposure unless another control prompts action. A delayed review can prolong that exposure, although other controls, such as replenishment rules, markdown triggers or supplier changes, may act first; the review interval is one of the controls on how long a dead SKU survives, alongside the rules used to identify it.

How to stop paying it

The fix is not heroics; it is an agreed cadence and usable evidence. Where sell-through, margin and space data are current and permitted, an assistant can review the assortment on that cadence rather than once a season:

• It lists candidate SKUs whose sell-through, margin and space numbers suggest they have stopped earning their place, with those numbers attached and the context the rules ask for.
• It surfaces possible substitutions or consolidations as candidates, with the substitution and customer risk to be checked before any cut.
• It hands the merchant a reasoned candidate list to review, not a spreadsheet to build.

The human still decides. What changes is that the decision can be made on a cadence the business agrees, with the results observed after each cut, rather than when someone finds the time.

A focused starting point

EIG can help examine a defined range or category review, its information requirements and the practical work needed to make the slow-stock decision on a cycle the business sets. Scope, participants, permitted sources and deliverables are agreed before the work begins.

Explore merchandising and assortment consulting.

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