Obsolete inventory: meaning, examples and what to do

A stock-ageing report flags everything that has not moved for a year. The list includes a repair spare, current packaging and a component for a discontinued product.

Clearing those shelves based on the ageing flag could leave maintenance without a spare it still needs.

Obsolete inventory has lost its intended use or market because requirements have changed. Age can prompt the review, but age alone does not settle that decision. A superseded item may still have a resale or recovery route, so obsolete to this business does not necessarily mean worthless everywhere.

Slow-moving, excess and obsolete inventory are different

Slow-moving describes little recorded movement over a stated period. Excess means more stock than a defined requirement justifies. Obsolescence concerns whether the item still has a useful application or market. Expired stock has passed an applicable use-by or shelf-life limit; it is not simply stock that has moved slowly. The FIFO vs FEFO example follows that date-based control.

Our fictional review contains these three lines:

Stock line	What the report shows	What the team finds	Decision to investigate
Repair seal	No issue for 18 months	Still fits equipment in service; failure demand is infrequent	Check criticality, replacement lead time and the required spare quantity
Current packaging	500 packs held, 100 expected to be needed before a planned version change	Some of the balance may be excess; the change and demand are still assumptions	Review future use, cancellation and supplier-return options
Old controller	100 units left after its product range was discontinued	No approved internal use; a specialist may buy it	Confirm resale, return or disposal, with Engineering and Finance involved

The ABC/XYZ inventory analysis can help organise the review. It cannot decide whether the seal protects a critical machine or whether the controller is approved for another use.

Likewise, inventory turnover relates a stock balance to activity. It does not measure the age or usefulness of every item in that balance.

Check the future requirement before calling stock obsolete

For the seal, confirm that the relevant equipment is still in service and that the part revision fits. Look at the maintenance policy and credible replacement options. Low usage may be exactly what an emergency spare is expected to show.

For the packaging, check the version-change date and the orders still needing the current design. The possible 400-pack excess follows from our stated horizon: 500 held minus 100 expected use. If the change slips or demand differs, the conclusion changes.

For the controller, ask whether an alternative application is technically approved. Similar dimensions or a compatible-looking connector are not approval to substitute it.

Keep these decisions with the item, revision, location, quantity, evidence date and owner. A report that groups revisions under one item number can hide the stock the operation can actually use.

Give the stock an approved disposition

Possible routes include using the item for an approved requirement, returning it under agreed terms, selling it, repairing or reworking it where appropriate, recycling it or disposing of it. Each needs evidence and authority suited to the material.

Compare achievable recovery with the relevant additional costs. A buyer offering €400 is not offering €400 net if preparing and selling the stock costs €100. Include any required handling, testing or disposal costs in the decision.

A reverse-logistics process helps manage items moving back from customers or toward a supplier. Keep stock status controlled until the chosen route is approved. A shelf marked “clearance” is not evidence that a unit is fit for release.

There is no helpful universal rule that every item older than twelve months should be scrapped. Set review triggers around the product, operating risk and evidence of continuing use.

What does obsolescence mean for the stock value?

For an IFRS illustration, IAS 2 measures inventory at the lower of cost and net realisable value. Net realisable value is the estimated selling price less estimated completion and selling costs.

Suppose our 100 controllers cost €20 each. Assume an appropriate estimate supports resale at €4 each, with €1 each needed to complete the sale.

Under those assumptions and that accounting basis, the inventory would be written down by €1,700. Finance still needs to assess the estimates and applicable treatment.

The write-down does not remove the controllers from the building. It does not create €1,700 of cash, and it does not establish that a buyer has paid €300. Valuation, physical disposition and cash collection are separate events.

Stop the same surplus building again

After clearing a line, follow how it became excess or lost its use. Did the engineering change reach Purchasing before another order was placed? Did a minimum order quantity outlast the product's remaining demand? Were repair spares reviewed when equipment was retired?

Keep useful stock under review without treating every quiet item as a planning mistake. The inventory-management Note starts with the record and the actual shortage mechanism before changing a policy.

For this list, maintenance should decide the spare requirement, Planning should check packaging demand and the change date, and Engineering should confirm the controller's permitted uses. Finance can then value the evidence-backed outcome. One ageing flag should not make all those decisions at once.

Sources and example notes

• IFRS Foundation: IAS 2 Inventories, lower of cost and net realisable value, and recognition of write-downs.

Items, quantities, costs and recovery assumptions are fictional. The accounting calculation illustrates a stated IFRS basis, not every organisation's accounting or tax treatment. No physical disposal or cash recovery is assumed to have happened.