FASB ASC 330 Inventory: Costing, Write-Downs, and Disclosures

ASC 330 is the FASB standard that governs inventory accounting under U.S. GAAP. It tells you three things: what costs to capitalize into inventory when you buy or produce it, how to move those costs to cost of goods sold as items are sold, and when to write inventory down because its value has fallen below what you paid. The framework was reshaped in 2015 when ASU 2015-11 replaced the older “lower of cost or market” test with a simpler “lower of cost or net realizable value” standard for most companies.¹

What Belongs in Inventory

Inventory under ASC 330 covers finished goods held for sale, raw materials awaiting production, and work-in-process items that are partially complete. The distinction matters because each category carries different cost components and different exposure to obsolescence.

Ownership, not physical possession, controls whether an item sits on your balance sheet. Goods held on consignment from a supplier stay on the supplier’s books until they sell, even if they occupy your warehouse. Goods you ship to a retailer on consignment stay on your books until the retailer sells them to an end customer.

Goods in transit at period-end need attention. FOB shipping point terms transfer ownership when goods leave the seller’s dock, so the buyer records inventory the moment it ships. FOB destination terms leave ownership with the seller until the goods arrive at the buyer’s location. Ignoring these terms misstates inventory at every close where significant shipments are moving.

What Costs Get Capitalized

Inventory enters the balance sheet at historical cost: the total expenditure required to bring the goods to their present condition and location. What that includes depends on whether you purchase the inventory or produce it.

Purchased Inventory

For a retailer or distributor, inventory cost includes the purchase price, inbound freight, import duties, and handling charges needed to get the goods to your facility. Trade discounts reduce cost. Cash discounts for early payment are generally treated as income rather than a cost reduction.

Manufactured Inventory

Manufacturers must apply full absorption costing. Direct materials, direct labor, and manufacturing overhead all get loaded into unit cost. Overhead includes both variable components tied to output and fixed components like factory rent and equipment depreciation.

Fixed overhead allocation runs off the facility’s normal capacity, not actual production. When output falls well below normal, the unabsorbed overhead attributable to idle capacity gets expensed in the period rather than pushed onto the smaller number of units produced. Without that rule, slow quarters would inflate inventory values.

Costs That Cannot Be Capitalized

Several categories must be expensed as incurred and never touch inventory:

Selling expenses, including advertising, sales commissions, and distribution of finished goods.
General and administrative overhead unrelated to manufacturing, such as corporate salaries, legal fees, and executive compensation.
Abnormal spoilage, scrap, and idle facility costs beyond normal levels. Normal spoilage stays inventoriable; abnormal amounts do not.
Research and development, which is expensed under ASC 730.

Companies using standard costing internally must still allocate variances between standard and actual back to inventory for external reporting, so the reported figures approximate actual cost.

Choosing a Cost Flow Method

When identical goods are purchased at different prices over time, you need a systematic rule to decide which costs move to cost of goods sold and which stay in ending inventory. GAAP permits four methods, and the choice affects reported profit, tax liability, and balance sheet values.

First-In, First-Out

FIFO expenses the oldest costs first. Ending inventory reflects the most recent purchases, so the balance sheet approximates current replacement cost. During inflation, FIFO produces higher reported profit because older, cheaper costs are matched against current revenue.

Last-In, First-Out

LIFO expenses the newest costs first. In a rising-price environment, that matches current costs against current revenue and produces lower gross profit and lower taxable income. Ending inventory, however, gets stuck at older costs that may bear little resemblance to current value. LIFO is permitted under U.S. GAAP but prohibited under IFRS, which complicates comparability for internationally active companies.

Weighted-Average Cost

This method pools all costs. A new average cost per unit is computed after each purchase in a perpetual system, or at period-end in a periodic system, by dividing total cost of goods available for sale by total units available. Both cost of goods sold and ending inventory use the blended rate. Results fall between FIFO and LIFO.

Specific Identification

When each unit is physically distinguishable and individually tracked, you can assign the actual cost of each item sold. It’s standard for automobiles, jewelry, and custom equipment. Specific identification produces the cleanest matching but is impractical for fungible goods and creates room to shape reported income by choosing which particular units to “sell.”

Whichever method you pick, you must apply it consistently from period to period. A change in cost flow assumption is a change in accounting principle under ASC 250 and requires retrospective application and disclosure.

Writing Inventory Down

Inventory loses value when goods become obsolete, market prices drop, or products are damaged. ASC 330 requires you to check for that and record a write-down when carrying cost exceeds recoverable value. The specific test depends on which cost flow method you use.

Lower of Cost or Net Realizable Value

For inventory measured under FIFO, weighted-average, or specific identification, the test is a single comparison. Net realizable value equals the estimated selling price in the ordinary course of business, minus reasonably predictable costs of completion, disposal, and transportation.¹ If NRV is below cost, the difference is a loss in the current period.

This is the framework ASU 2015-11 introduced, replacing an older three-way comparison involving replacement cost, a ceiling, and a floor. The write-down can be applied item by item, by major category, or to the inventory pool as a whole. The approach chosen should most clearly reflect periodic income and must be applied consistently.¹ Item-by-item is the most conservative and the most commonly used.

Once recorded, the reduced amount becomes the new cost basis. Annual write-downs are not reversed if value later recovers. Within interim periods of the same fiscal year, a company may recognize recoveries of earlier interim write-downs as gains, capped at the amount of the previously recognized loss.

Lower of Cost or Market for LIFO and Retail Users

Companies using LIFO or the retail inventory method were excluded from the ASU 2015-11 simplification and must still apply the older lower of cost or market framework.¹ “Market” here means current replacement cost, subject to a ceiling of NRV and a floor of NRV less a normal profit margin. If replacement cost falls within those bounds, it is used; if it exceeds the ceiling, the ceiling applies; if it falls below the floor, the floor applies. That designated market value is then compared to cost, and the lower figure is used.

LIFO Conformity and LIFO Liquidation

LIFO carries a constraint that no other method does. IRC Section 472 requires any company using LIFO on its tax return to also use LIFO in the financial statements it issues to shareholders and creditors.² The conformity rule blocks the combination of LIFO on the tax return with FIFO on the financials. Supplemental FIFO figures may be disclosed parenthetically or in a footnote as long as the primary statements use LIFO.

A LIFO liquidation occurs when a company sells more inventory than it purchases in a period and dips into older LIFO layers recorded at much lower historical costs. Those old costs flow to cost of goods sold, and reported gross profit jumps. The gain is an accounting artifact rather than the result of better pricing or operations, and the tax bill on the inflated income is real. SEC Staff Accounting Bulletin Topic 11.F requires disclosure of the income statement impact when a LIFO liquidation occurs.

Bill-and-Hold Arrangements

Invoicing a customer does not by itself let you remove goods from inventory. Under ASC 606, a seller can derecognize inventory and recognize revenue on a bill-and-hold arrangement only if all four of these conditions are met: the arrangement exists for a substantive reason, typically at the buyer’s request; the specific units are separately identified as the buyer’s; the goods are physically complete and ready to ship; and the seller cannot use them or redirect them to another customer.³ Fail any of them and the goods stay on your books regardless of what the invoice or contract says.

Required Disclosures

Every GAAP reporter must disclose the cost flow method in use and the basis for valuing inventory (lower of cost or NRV, or lower of cost or market for LIFO and retail users). Substantial or unusual losses from write-downs should be separately disclosed, and it is often desirable to show the write-down as a separate line rather than folding it into cost of goods sold.¹

SEC registrants have more to disclose. Major inventory classes, including finished goods, work-in-process, raw materials, and supplies, must appear on the balance sheet or in the notes. The description of cost must identify the nature of the cost elements included. If any general and administrative costs are charged to inventory, the aggregate amount incurred each period and the estimated amount remaining in inventory at each balance sheet date must be disclosed. LIFO users must disclose the excess of replacement cost or current cost over the stated LIFO value when the difference is material, a figure commonly known as the LIFO reserve.⁴ Inventory pledged as collateral requires disclosure of the approximate amounts and related obligations.

Why Getting It Right Matters

Inventory is one of the most common vehicles for financial statement fraud because overstating ending inventory simultaneously inflates assets on the balance sheet and understates cost of goods sold on the income statement. A modest percentage overstatement can make an unprofitable company look healthy. The SEC identifies material misstatements and deficient internal controls, both of which can trace back to inventory accounting failures, as priority enforcement areas.⁵ Restating inventory triggers reaudits, damages credibility with lenders and investors, and often draws shareholder litigation on top of any regulatory penalty.

1
FASB. Accounting Standards Update 2015-11 Inventory Topic 330
2
Office of the Law Revision Counsel. 26 USC 472 Last-in First-out Inventories
3
FASB. Accounting Standards Update 2014-09 Revenue From Contracts With Customers Topic 606
4
eCFR. 17 CFR 210.5-02 Balance Sheets
5
U.S. Securities and Exchange Commission. SEC Announces Enforcement Results for Fiscal Year 2024