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Why Book Value Drops While Inventory Remains Unchanged: Calculation and Application of Net Realizable Value

Differentiating between the formula for net realizable value, inventory cost, and the differences in discounts, disposal, and cash flows to connect them to inventory decision-making.

이지영 EditorPublished 2026년 9월 17일Updated 2026년 9월 17일
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Why Book Value Drops While Inventory Remains Unchanged: Calculation and Application of Net Realizable Value

Even when products remain in the warehouse, their book value can change. This is because the physical fact that an item is undamaged is not the same as determining that it can be sold at the price originally expected. When trends change, new models emerge, or additional costs become necessary for sales, the amount that can be recovered from the same item also changes. This is a shift that is easy to miss when inventory is managed solely by quantity.

International Accounting Standard (IAS) 2 explains that inventories should be measured at the lower of cost and net realizable value (NRV). NRV is the estimated selling price in the ordinary course of business, less the estimated costs of completion and the estimated costs necessary to make the sale. The entire amount expected to be received from a customer does not immediately become the recoverable amount of the inventory, because costs remain to be incurred in the future to sell it.

This concept is not a term required only at the time of financial closing. It prompts the same questions when deciding when to start discount sales, whether to perform additional processing, or whether to shift to alternative distribution channels. It distinguishes how much has already been spent from which choice will recover more value now. Spending time solely with the objective of protecting past purchase prices can cause sales opportunities and storage costs to change together.


재고는 그대로인데 장부가치는 왜 줄어들까, 순실현가능가치의 계산과 활용 관련 비교와 판단 구조
Source: IFRS Foundation IAS 2 Inventories · [Data Composition: KBR Editorial Team]

What Should Be Subtracted from the Selling Price?

The expected selling price may differ from the number on the price tag because price differences based on discounts, channel conditions, and product conditions that must be provided in actual transactions need to be reflected. If costs required to complete or sell the product still remain, those portions are also considered together. When judging the value of unsold inventory, the money to be received and the additional tasks to be performed to receive that money must be placed on the same table.

For example, assuming a situation where a product with a cost of 100,000 KRW can be sold for 90,000 KRW, and additional costs required for completion and sale are 10,000 KRW, the net realizable value is 80,000 KRW. Under these conditions, the difference reflecting the recoverable amount lower than the cost is 20,000 KRW. This is not the average loss rate of the entire market, but a calculation inserting given prices and costs. It shows that even with the same selling price, if the remaining costs change, the judgment changes.

A drop in selling price does not always mean inventory must be discarded. The judgment to recognize a book loss and how to handle the items moving forward are connected, but separate decisions. Costs already spent are outcomes of the past, and for comparing current alternatives, incoming cash and additionally outgoing cash in the future are important. Even for a product with a reduced book value, selling it may be more advantageous than storing or discarding it.

Conversely, postponing sales on the grounds of not wanting to sell below cost may merely delay confirmation rather than avoid losses. As seasons pass or product compatibility declines, the recoverable amount may decrease further. Therefore, a strategy to maintain price requires grounds that the price can be obtained even as time passes. This is a part that must be distinguished from the emotional difficulty of simply giving up an initially set profit margin.


Inventory Age Alone Does Not Determine Value

Storage duration is an important warning signal, but it cannot replace valuation. The risks of parts that sell stably even when stored for a long time and goods whose demand changes within a short period differ. Only by placing remaining quantities, current orders, the emergence of substitute products, and sales channel accessibility together can one judge what kind of problem aging inventory actually creates.

The method of reducing a uniform percentage after a certain period, while ignoring product-specific characteristics, may be convenient for management, but it can miss individual situations. Products stored for a specific customer's confirmed order and products accumulated expecting general sales have different recovery conditions. Evaluation criteria must be established, but they must be connected to data that can explain actual transaction conditions so that numbers have both consistency and realism.

The location of inventory also affects economic feasibility. Even for the same product, if it is in a warehouse far from regions with customer demand, additional transportation and repackaging costs may be incurred. Returned products may require inspection or component replenishment before being resold. Assuming that all inventory can be recovered under the same conditions simply because item codes are identical tends to underestimate actual disposal costs.

Therefore, inventory management sheets should connect not only quantity and cost, but also saleable status, expected routes, and remaining work. If it is difficult to calculate all items precisely from the beginning, one can start with items that are large in scale and subject to volatile prices. The goal is not to create a massive table without blank spaces, but to discover the causes of value decline early and change behavior.


Discounts Can Be the Cause of Loss or a Choice to Prevent Greater Loss

The explanation that discount sales lower profit margins may be valid for a single point in time. However, when including the results of delayed sales, the comparison changes. When comparing the amount recovered through discounting now versus the amount recovered after future storage, storage costs, additional handling, product condition, and demand changes are all factored in. Judging solely on normal selling prices and discount selling prices omits the cost of time.

For example, if little time remains for the sales period of a seasonal product, discounting can become a way to approach remaining demand. On the other hand, discounting a continuously selling product due to short-term sales targets can unnecessarily lower prices for customers who would have bought at normal prices. The meaning of the same discount rate varies depending on the nature of the inventory and remaining sales opportunities. This is why inventory recovery strategies must be distinguished from revenue expansion strategies.

Alternatives such as changing sales channels can also be reviewed together. Instead of heavily lowering prices in existing channels, products can be sold through separate regions or bundled configurations, but new channels may entail commissions and return conditions. Even if the displayed selling price is high, the final recovery amount may be lower, so amounts remaining by channel must be compared. The fact that a transaction was concluded and the judgment that a favorable disposal was made are different.

The reactions of the brand and existing customers are also difficult to exclude. Frequent steep discounts can cause customers to wait for the next discount or alter relationships with distribution partners. However, vaguely using these risks to postpone all inventory liquidation is not the answer either. By setting the scope of which products, channels, and periods to apply discounts to, conflicts between immediate recovery and long-term pricing policies can be handled more concretely.


Separating Accounting Costs from the Timing of Cash Flows

IAS 2 explains that when inventory is sold, its carrying amount is recognized as an expense in the period in which the related revenue is recognized. In addition, write-downs to net realizable value and inventory losses are reflected as expenses of the period in which they occur. This principle shows that the timing of cash outflow when purchasing goods, the timing of sales, and the timing of reflecting value declines can all differ.

Evaluating inventory lower does not mean cash of the same amount flows out anew at that moment. Conversely, the absence of evaluation losses yet does not mean there is no cash burden. If purchase payments have already been made but sales are delayed, usable cash may be scarce even if assets remain on the books. This is why income statements and cash flows must be viewed separately.

Understanding this difference also clarifies the purpose of inventory meetings. The accounting department is responsible for reporting appropriate amounts, while the sales and purchasing departments manage future recovery and additional accumulation. Reflecting valuation losses does not conclude the tasks of sales, and establishing sales plans does not automatically create grounds for postponing accounting judgments. It is a structure where different responsibilities operate together regarding the same inventory.

After recognizing losses, it is important whether the causes are reflected in new procurement. Even if specific items sell slower than expected, if purchasing quantities remain unchanged, the problem can repeat even if existing inventory is discounted and cleared. Minimum order quantities, lead times, and sales forecast update cycles must be adjusted together for one-off disposals to lead to operational improvements. Accounting treatments reveal past states, while management plays the role of changing subsequent states.


Sales Optimism and Purchasing Discounts Meet in the Same Inventory

Lowering unit costs through bulk purchasing can improve the performance of the purchasing department. However, if the burden of unsold quantities is greater than the benefit of lowered unit costs, it may not be advantageous for the company as a whole. Such differences are obscured when purchasing unit costs, inventory turnover, and final recovery amounts are managed separately. Inventory reveals that even if departmental targets look rational, they can conflict when placed together.

Sales forecasts also need separation to ensure sales potential and hope are not mixed. Customer interest, requests for quotes, and confirmed orders are different stages. Reflecting the positive responses of customers who have not yet purchased as confirmed demand in procurement can prematurely shoulder inventory risks. Conversely, for products with long lead times requiring advance preparation, since uncertainty cannot be eliminated, it is better to explicitly state up to what level risks will be tolerated.

To this end, sales forecasts can be managed as ranges with conditions rather than a single number. This involves dividing required volumes for cases where orders from core customers are confirmed versus delayed, and setting the timing to decide on additional procurement. If small-scale responses are difficult due to a supplier's minimum order quantity, other options such as delivery splitting or item standardization can be reviewed. The subject of purchasing negotiations expands from unit price to risk distribution.

Return conditions are also important. Shipping to a sales outlet does not mean end-consumer demand has been confirmed, and if the probability of returns is high, inventory has merely moved to another location while risks remain. Viewing internal shipment performance and actual recoverable amounts together prevents channel stuffing from being packaged as performance. This is the limitation of management that looks only at quantities without understanding transaction conditions.


Questions That Must Change in Inventory Meetings

If month-end inventory meetings stop at reporting how much is left, actions will be delayed. Questions can shift to which items have altered sales conditions, what more must be done to recover value, and which orders must be adjusted to prevent further accumulation. Setting subsequent actions and decision-making timings by item transforms inventory management from number explanation to operational choice.

It is more productive to design responsibilities around updating the grounds for judgment rather than finding who caused a loss. Solutions differ depending on whether inaccurate demand forecasts stemmed from a lack of customer information, changes in lead times, or excessive procurement tailored to internal targets. Simply issuing instructions to buy less from then on can reduce even necessary inventory, harming lead times and customer experiences.

Reducing quantities for its own sake must not become the goal. Inventory needed due to supply uncertainty and inventory accumulated because of low sales potential play different roles even if their inventory days are identical. The former is a cost chosen for operational continuity, while the latter can represent a mismatch between demand and procurement. Distinguishing the two allows inventory reduction goals and service level goals to be discussed simultaneously.


Methods of Determining Cost Versus Methods of Judging Recoverable Value

It is also necessary to understand how inventory costs are calculated. The general overview of IAS 2 explains identifying individual costs for items that are generally not interchangeable, and applying FIFO (First-In, First-Out) or weighted average methods for interchangeable items. This is a matter of what costs to assign to the books. It is distinct from the issue of comparing those assigned costs with current recoverable amounts.

For example, if the same item was purchased at different times and unit prices, inventory book amounts cannot be known from warehouse quantities alone. The remaining amounts vary depending on the cost allocation method. However, regardless of the cost calculation method, the points remain that the prices customers are currently willing to pay and future sales costs required are what matter. Cost allocation logic and market recovery conditions must not be confused into a single number.

In internal sales judgments, the condition of individual products can become even more important. Even for the same item, goods with damaged packaging or missing accessories are difficult to sell through the same channels as normal-state products. Comparisons can be made on whether repair and packaging supplementation can increase recovery amounts, and whether those additional costs are smaller than the increased recovery amounts. Operational information supplements the fact that accounting bundles and disposal units required in the field are not always identical.

At this point, post-sale liabilities can also affect alternative comparisons. Selling products in differing conditions without sufficient explanation may yield higher short-term recovery amounts, but brings burdens of returns and customer service. Rather than liquidating inventory quickly, accurately communicating conditions and transaction conditions and selecting appropriate channels is correct for judging overall costs. Discounts cannot justify the omission of information.

For companies building management systems for the first time, items with recently delayed sales can be selected to trace records from purchase decisions to the present. Comparing initially expected sales timings, actual orders, price changes, and additional storage and disposal costs reveals which assumptions went wrong. Warning criteria established through this process can be applied to subsequent items, but if product characteristics differ, adjustments rather than direct copying are needed. Learning in inventory management does not end with organizing numbers, but is completed by changing procurement and sales standards.

The summary viewed by management should also leave the person in charge of the recovery plan and the next decision date. This is to verify whether evaluated numbers connect to execution.

Net realizable value is a language that re-views warehouse goods under current business conditions. It prompts questions of how much can be recovered rather than how much was paid, and what more must be spent for that recovery. When connecting these questions to pre-closing procurement and sales decisions, inventory ceases to be a loss revealed late and becomes a management task that can be adjusted early.

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    저작권자 ⓒ 코리아비즈니스리뷰(Korea Business Review). 무단 전재 및 재배포 금지

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