Accounting for inventory spoilage comes down to four steps: decide whether the loss is normal or abnormal, put a defensible dollar figure on it, post the right journal entry, and document everything well enough to survive an IRS or auditor review. That classification at the front of the process controls where the cost ends up, how it affects your gross margin, and whether it reduces taxable income this year or later.
Normal or Abnormal: The Classification That Drives Everything
The single most consequential decision in spoilage accounting is whether the loss was expected or not.
Normal spoilage is the waste you expect under efficient operating conditions. A bakery losing five percent of its dough during shaping, a chemical plant seeing predictable evaporation, a lumber mill generating sawdust and offcuts. These losses get baked into the cost of the good units that survive the process. When those finished products are eventually sold, the spoilage cost hits the income statement as part of cost of goods sold.
Abnormal spoilage comes from events outside the normal production range: a freezer failure that ruins a batch of vaccines, a forklift accident that destroys palletized inventory, a flood that contaminates raw materials. These losses are expensed immediately in the period they happen and never fold into inventory cost. That treatment protects the integrity of your gross profit margin, because a one-time freezer failure has nothing to do with how efficiently you produce under normal circumstances.
The line is not always clean. A manufacturer that routinely sees a two percent defect rate has a clear normal benchmark. If the defect rate jumps to eight percent because a supplier shipped off-spec raw materials, the excess six percent is abnormal. Setting a documented baseline for expected spoilage rates makes the classification defensible when auditors ask questions.
Rework, where an item that fails quality standards is corrected and sold at full price, follows the same logic. Routine rework gets absorbed into product costs the same way normal spoilage does. Rework caused by an abnormal event is expensed as a period cost.
Valuing the Spoiled Inventory
Before any journal entry, you need a dollar figure. Valuation depends on where in the production cycle the item was and whether it retains any residual worth.
Assigning Cost to Spoiled Units
The cost you assign to spoiled inventory follows whatever method the business already uses: FIFO, LIFO, or weighted average. For raw materials, the cost is the purchase price plus freight and handling. For work-in-process, you need to account for every dollar spent up to the point of spoilage: raw material cost, direct labor already performed, and an allocated share of factory overhead such as utilities and equipment depreciation. Production logs and time records are the backbone of that calculation.
Scrap Value and Net Realizable Value
Many spoiled items retain some value. Damaged metal can be sold for recycling. Off-spec chemicals may find a buyer at a discount. Expired food products can qualify for animal feed. Whatever a buyer will pay, minus the cost of getting the items to that buyer, is the net realizable value. Subtract that from total cost to arrive at the actual loss.
Under current GAAP, inventory measured using FIFO or average cost is carried at the lower of cost and net realizable value. If spoilage pushes an item’s net realizable value below its recorded cost, you recognize the difference as a loss in the period the decline occurs. Inventory valued under LIFO or the retail inventory method still follows the older lower-of-cost-or-market framework, which uses replacement cost bounded by a ceiling of net realizable value and a floor of net realizable value minus a normal profit margin.
The IRS Rule for Subnormal Goods
For tax purposes, damaged or spoiled inventory that cannot be sold at normal prices must be valued at the bona fide selling price minus direct costs of disposition. If the spoiled items are raw materials or partially finished, you value them on a reasonable basis considering their usability and condition, but never below scrap value.1eCFR. 26 CFR 1.471-2 – Valuation of Inventories
“Bona fide selling price” means you actually offered the goods for sale within 30 days after the inventory date. That window catches businesses off guard. If you write down spoiled inventory on your tax return but never attempted to sell or dispose of it within that timeframe, the IRS can challenge the deduction.2Internal Revenue Service. Lower of Cost or Market (LCM) Goods that are completely unsalable due to physical deterioration may be exempt from the 30-day offering requirement. Courts have recognized that forcing a business to offer worthless goods for sale would be an empty gesture. You still need documentation proving the items are genuinely worthless, not just inconvenient to sell.
Journal Entries
The entries flow directly from the normal-versus-abnormal classification.
Normal Spoilage
When normal spoilage occurs during production, the cost of the spoiled units is typically transferred from Work-in-Process into Manufacturing Overhead. That spreads the loss across all good units produced during the period, which is the whole point: normal spoilage is a cost of doing business that every surviving unit should carry. If any scrap value is recovered, credit Manufacturing Overhead (or a Scrap Inventory account) to offset the loss. When the finished goods are eventually sold, the embedded spoilage cost flows into cost of goods sold.
Abnormal Spoilage
Abnormal spoilage gets isolated in its own expense account to keep it out of product costs. Debit a Loss from Abnormal Spoilage account (or a similar operating-expense label) and credit the appropriate inventory account: Raw Materials, Work-in-Process, or Finished Goods. If you recover some value by selling the scrap, debit Cash or Accounts Receivable and credit the loss account to reduce the recognized expense. The goal is a clean audit trail. Anyone reviewing the ledger should see exactly how much was lost to abnormal events, separate from the cost of routine production.
Where Spoilage Shows Up on the Financial Statements
Placement carries real consequences for how investors and lenders read your operations.
Normal spoilage costs are bundled into cost of goods sold once the related finished goods are sold. The loss is real, but invisible as a separate item because it represents the expected cost of production. Abnormal spoilage appears as a distinct line item, usually under operating expenses or other losses. That separation protects the gross profit margin from being distorted by one-time events and lets analysts compare operational efficiency across periods without noise from accidents or equipment failures.
On the balance sheet, both types reduce the inventory balance. Normal spoilage reduces inventory indirectly by increasing the per-unit cost allocated to remaining goods. Abnormal spoilage directly removes the spoiled items’ full value from the inventory total. The asset figures should reflect only inventory that is actually available for sale or use in production.
Normal spoilage does not require separate footnote disclosure unless it deviates significantly from historical trends. A spoilage loss that is small in dollar terms could still be material if it masks an earnings trend, affects loan covenant compliance, or signals a problem in a key business segment.
Tax Treatment
Spoilage flows through the cost of goods sold calculation rather than appearing as a standalone deduction on most business returns. Understanding the mechanics prevents both missed write-offs and double-counted losses.
How the Deduction Actually Happens
Under the general inventory rule, businesses must value inventory using a method that conforms to best accounting practice and clearly reflects income.3Office of the Law Revision Counsel. 26 U.S. Code 471 – General Rule for Inventories Spoilage reduces ending inventory. Since cost of goods sold equals beginning inventory plus purchases and production costs minus ending inventory, a lower ending inventory produces higher COGS and lower taxable income. The loss is reported on Form 1125-A, which requires checking a box if you wrote down subnormal goods during the year.4Internal Revenue Service. Form 1125-A, Cost of Goods Sold
Section 263A and the UNICAP Rules
Manufacturers and certain resellers subject to the uniform capitalization rules under Section 263A must capitalize spoilage costs into inventory. The Treasury regulations specifically list spoilage, including rework labor and scrap, as an indirect cost that must be allocated to produced or acquired property.5GovInfo. 26 CFR 1.263A-1 – Uniform Capitalization; Capitalization and Inclusion in Inventory Costs of Certain Expenses For tax purposes, normal spoilage cannot simply be expensed in the current year. It must be capitalized as part of inventory and only reduce taxable income when the related goods are sold. The statute applies to real or tangible personal property produced by the taxpayer, and to property acquired for resale.6Office of the Law Revision Counsel. 26 U.S. Code 263A – Capitalization and Inclusion in Inventory Costs of Certain Expenses
Section 471(c) provides an exemption for small businesses that meet the gross receipts test under Section 448(c). The base threshold is $25 million in average annual gross receipts over the prior three tax years, adjusted annually for inflation.7Office of the Law Revision Counsel. 26 U.S. Code 448 – Limitation on Use of Cash Method of Accounting Qualifying small businesses can treat inventory as non-incidental materials and supplies or follow the method used on their financial statements, sidestepping the full UNICAP capitalization requirement.3Office of the Law Revision Counsel. 26 U.S. Code 471 – General Rule for Inventories
Casualty and Theft Losses
When inventory is destroyed by a casualty (fire, flood, storm) or stolen, you have two options. The default approach is to claim the loss through the COGS calculation by properly reporting your opening and closing inventories. Alternatively, you can elect to claim it separately as a casualty or theft loss, but if you do, you must adjust your opening inventory or purchases to remove the loss items so the loss is not counted twice. Any insurance reimbursement received for the loss is taxable income.8Internal Revenue Service. Publication 538 (01/2022), Accounting Periods and Methods – Inventories If the loss results from a federally declared disaster, you can elect to deduct it on the prior year’s return, which can accelerate the tax benefit, but you must then decrease opening inventory for the disaster year to prevent double counting.
Documentation That Survives an Audit
The IRS places the burden of proof on the taxpayer to demonstrate that inventory is subnormal and that the write-down figure is accurate. Weak documentation is where spoilage deductions fall apart during examinations.
For finished goods written down to a reduced selling price, you need evidence that the goods were actually offered for sale at that price within 30 days after the inventory date. Acceptable proof includes records showing an offering for sale, an actual sale, or a contract cancellation. For raw materials or partially finished goods, the valuation must be reasonable given the condition and usability of the items, and you need records showing how you arrived at the figure.2Internal Revenue Service. Lower of Cost or Market (LCM)
Items that are completely unsalable due to physical deterioration must be removed from inventory entirely. IRS examiners are instructed to request contemporaneous documentation supporting the disposition of subnormal goods, including evidence of disposal, sales attempts, and contract activity. “Contemporaneous” is the key word. Documentation created months later during an audit looks like reconstruction.
A practical spoilage log captures, for every incident:
- Date and location where the spoilage was identified
- Item description and quantity lost
- Cause: equipment failure, expiration, contamination, handling damage, or other
- Classification as normal or abnormal, with the rationale
- Cost assigned, including the valuation method and any allocated labor and overhead
- Scrap or salvage value recovered and how the figure was determined
- Disposition of the items, with supporting records
Book inventories should be verified by physical counts at reasonable intervals and adjusted to conform with the physical results.1eCFR. 26 CFR 1.471-2 – Valuation of Inventories Section 471(b) also permits estimates for inventory shrinkage, provided the business performs regular physical counts and adjusts its estimating methods when estimates diverge from actual losses.3Office of the Law Revision Counsel. 26 U.S. Code 471 – General Rule for Inventories That second requirement is easy to overlook. If your estimated shrinkage rate has been five percent for three years but physical counts consistently show three percent, the IRS expects you to adjust the estimate downward.
Insurance Recoveries
When spoilage results from an insured event, the recovery needs its own accounting treatment. You do not simply net the recovery against the loss.
Under GAAP, the loss and the recovery are recognized separately. The inventory loss is recorded when it occurs, even if you have filed a claim. A recovery asset can only be recognized when realization of the claim is probable, meaning the insurer has acknowledged coverage or the claim is otherwise virtually certain to be paid. Until then, the recovery stays off the books. If insurance proceeds ultimately exceed covered losses, the excess is treated as a gain contingency with a higher recognition threshold, typically requiring the proceeds to be realized or realizable before recognition.
For tax purposes, any insurance reimbursement received for an inventory loss is taxable income.8Internal Revenue Service. Publication 538 (01/2022), Accounting Periods and Methods – Inventories If you elected to claim the loss separately as a casualty loss rather than through cost of goods sold, you must reduce the claimed loss by the amount of reimbursement received or reasonably expected. Forgiveness of amounts owed to creditors or suppliers because of inventory loss is also treated as taxable income.