How should inventory be measured and written down under ASC 330?

Core rule Inventory must be measured at the lower of its carrying amount (cost) or net realizable value (NRV) — unless the entity uses LIFO or the retail inventory method (RIM), in which case the lower of cost or market (LCM) standard applies instead (ASC 330-10-35-1C). When market value or NRV falls below cost due to obsolescence, damage, or shifts in demand, the carrying amount must be written down and an impairment loss recognized immediately. Write-downs are not reversible under US GAAP, even if conditions later improve. --- How it works - Two impairment frameworks, depending on cost flow method. Most entities measure inventory at the lower of cost or NRV (ASC 330-10-35-1B). Entities using LIFO or RIM apply the lower of cost or market test instead (ASC 330-10-35-1C). The practical difference matters: "market" under LCM has a defined ceiling and floor, whereas NRV is simply the estimated selling price less reasonably predictable costs to complete and sell the inventory. - What goes into cost. Inventory cost includes purchase price, conversion costs, and other costs incurred in bringing inventory to its present location and condition (ASC 330-10-30-1). Fixed overhead must be allocated based on normal production capacity rather than actual output, p

How should NRV be estimated when a product is phased out and no comparable market transactions exist?

reventing inventory values from being inflated during low-production periods (ASC 330-10-30-3). Abnormal amounts of idle facility expense, freight, handling costs, and wasted materials must be excluded from inventory cost entirely and expensed in the period incurred (ASC 330-10-30-7). - Choosing the unit of account. Impairment is assessed either item by item or by reasonable groupings, depending on the character and composition of the inventory (ASC 330-10-35-8). Grouping similar items is acceptable when it reflects how the business manages and prices inventory, but arbitrary aggregation that masks individual impairments is not appropriate. The chosen approach should clearly reflect periodic income. - Recognizing and measuring a write-down. When NRV — or market, for LIFO/RIM inventory — falls below the carrying amount, the entity reduces the carrying amount to the lower value and recognizes an impairment loss in the current period. Once written down, that reduced carrying amount becomes the new cost basis. Recovery of previously recognized losses is not permitted (ASC 330-10-35-1A). Entities should reassess inventory values at each reporting date, both annual and interim (ASC 330-10-35-17). - Cost flow method consistency. Once an entity selects a cos

If inventory is written down in 20X4 but sells in 20X5 for more than the 20X4 NRV, how is the gain treated under ASC 330 and does the allowance reverse?

t flow assumption — such as FIFO, LIFO, or weighted-average — it must apply that method consistently from period to period (ASC 330-10-30-15). Changes in cost flow method require justification and disclosure. --- Common pitfalls - Using actual capacity instead of normal capacity for overhead allocation. Allocating fixed overhead based on actual production volumes inflates inventory cost in low-output periods. Normal capacity is the required benchmark under ASC 330-10-30-3. - Offsetting impaired items against appreciated items. Entities sometimes group inventory too broadly, allowing unrealized gains on some items to offset losses on others. ASC 330-10-35-8 requires that the unit of account reflect the actual character and composition of the inventory — not a grouping designed to minimize write-downs. - Failing to write down inventory to current NRV or market. Some entities delay recognizing impairment losses hoping conditions will reverse. US GAAP does not permit this deferral. The write-down must be recognized in the period the loss is identified. - Capitalizing costs that should be expensed. Selling costs, abnormal waste, and general administrative costs are not inventoriable. ASC 330-10-30-7 is explicit that such costs must be charged to expense i

What is the audit trail and documentation best practice for supporting NRV estimates and obsolescence decisions for SOX compliance?

n the period incurred, not deferred into inventory. - Misapplying the NRV versus market distinction. Applying the NRV framework to LIFO or RIM inventory — or vice versa — produces incorrect results. The applicable impairment test depends on the cost flow method in use (ASC 330-10-35-1C for LIFO/RIM; ASC 330-10-35-1B for all other methods). --- Key paragraphs to know - ASC 330-10-30-1 — Establishes that inventory cost includes purchase price, conversion costs, and all costs necessary to bring inventory to its present location and condition. - ASC 330-10-30-3 — Requires fixed overhead allocation to be based on normal production capacity, not actual capacity. - ASC 330-10-30-7 — Specifies that abnormal costs — including idle facility expense, excessive freight, and wasted materials — must be expensed in the period incurred, not capitalized. - ASC 330-10-35-1B — Mandates the lower of cost or NRV measurement for inventory not accounted for under LIFO or RIM. - ASC 330-10-35-1C — Requires entities using LIFO or RIM to apply the lower of cost or market test instead of the NRV framework. - ASC 330-10-35-8 — Provides guidance on selecting the appropriate unit of account for inventory impairment testing, based on the character and composition of the inventory.

ASC 330 Inventory — Lower of Cost or NRV

ASC 330 Inventory — Core Rule

Inventory must be measured at the lower of its carrying amount (cost) or net realizable value (NRV) — unless the entity uses LIFO or the retail inventory method (RIM), in which case the lower of cost or market (LCM) standard applies instead (ASC 330-10-35-1C). When market value or NRV falls below cost due to obsolescence, damage, or shifts in demand, the carrying amount must be written down and an impairment loss recognized immediately. Write-downs are not reversible under US GAAP, even if conditions later improve.

How ASC 330 Inventory Works

Two impairment frameworks, depending on cost flow method. Most entities measure inventory at the lower of cost or NRV (ASC 330-10-35-1B). Entities using LIFO or RIM apply the lower of cost or market test instead (ASC 330-10-35-1C). The practical difference matters: "market" under LCM has a defined ceiling and floor, whereas NRV is simply the estimated selling price less reasonably predictable costs to complete and sell the inventory.

What goes into cost. Inventory cost includes purchase price, conversion costs, and other costs incurred in bringing inventory to its present location and condition (ASC 330-10-30-1). Fixed overhead must be allocated based on normal production capacity rather than actual output, preventing inventory values from being inflated during low-production periods (ASC 330-10-30-3). Abnormal amounts of idle facility expense, freight, handling costs, and wasted materials must be excluded from inventory cost entirely and expensed in the period incurred (ASC 330-10-30-7).

Choosing the unit of account. Impairment is assessed either item by item or by reasonable groupings, depending on the character and composition of the inventory (ASC 330-10-35-8). Grouping similar items is acceptable when it reflects how the business manages and prices inventory, but arbitrary aggregation that masks individual impairments is not appropriate. The chosen approach should clearly reflect periodic income.

Recognizing and measuring a write-down. When NRV — or market, for LIFO/RIM inventory — falls below the carrying amount, the entity reduces the carrying amount to the lower value and recognizes an impairment loss in the current period. Once written down, that reduced carrying amount becomes the new cost basis. Recovery of previously recognized losses is not permitted (ASC 330-10-35-1A). Entities should reassess inventory values at each reporting date, both annual and interim (ASC 330-10-35-17).

Cost flow method consistency. Once an entity selects a cost flow assumption — such as FIFO, LIFO, or weighted-average — it must apply that method consistently from period to period (ASC 330-10-30-15). Changes in cost flow method require justification and disclosure.

ASC 330 Inventory — Common Pitfalls

Using actual capacity instead of normal capacity for overhead allocation. Allocating fixed overhead based on actual production volumes inflates inventory cost in low-output periods. Normal capacity is the required benchmark under ASC 330-10-30-3.

Offsetting impaired items against appreciated items. Entities sometimes group inventory too broadly, allowing unrealized gains on some items to offset losses on others. ASC 330-10-35-8 requires that the unit of account reflect the actual character and composition of the inventory — not a grouping designed to minimize write-downs.

Failing to write down inventory to current NRV or market. Some entities delay recognizing impairment losses hoping conditions will reverse. US GAAP does not permit this deferral. The write-down must be recognized in the period the loss is identified.

Capitalizing costs that should be expensed. Selling costs, abnormal waste, and general administrative costs are not inventoriable. ASC 330-10-30-7 is explicit that such costs must be charged to expense in the period incurred, not deferred into inventory.

Misapplying the NRV versus market distinction. Applying the NRV framework to LIFO or RIM inventory — or vice versa — produces incorrect results. The applicable impairment test depends on the cost flow method in use (ASC 330-10-35-1C for LIFO/RIM; ASC 330-10-35-1B for all other methods).

ASC 330 Inventory — Key Paragraphs

ASC 330-10-30-1 — Establishes that inventory cost includes purchase price, conversion costs, and all costs necessary to bring inventory to its present location and condition.
ASC 330-10-30-3 — Requires fixed overhead allocation to be based on normal production capacity, not actual capacity.
ASC 330-10-30-7 — Specifies that abnormal costs — including idle facility expense, excessive freight, and wasted materials — must be expensed in the period incurred, not capitalized.
ASC 330-10-35-1B — Mandates the lower of cost or NRV measurement for inventory not accounted for under LIFO or RIM.
ASC 330-10-35-1C — Requires entities using LIFO or RIM to apply the lower of cost or market test instead of the NRV framework.
ASC 330-10-35-8 — Provides guidance on selecting the appropriate unit of account for inventory impairment testing, based on the character and composition of the inventory.