Can a Business Deduct the Cost of Damaged or Unsellable Inventory?
Inventory that’s damaged, spoiled, or simply too outdated to sell represents money already spent, but recovering any tax benefit from that loss works differently than deducting an everyday business expense.
The short answer
A business generally accounts for unsellable inventory by adjusting its cost of goods sold rather than claiming a separate line-item deduction, since inventory is treated as an asset until it’s sold or otherwise disposed of. Writing down or writing off damaged, obsolete, or unsellable inventory effectively increases the cost of goods sold for the period, which reduces taxable income the same way a deduction would — just through a different mechanic. The general concept holds across most methods, though the specific accounting steps depend on the inventory method the business uses.
Why inventory isn’t deducted like a regular expense
Most ordinary purchases — office supplies, advertising costs, contract labor — get deducted in the period they’re paid or incurred. Inventory doesn’t work that way. Because inventory is held as an asset on the business’s books until it’s sold, its cost normally flows through the cost of goods sold calculation rather than being deducted upfront when purchased. That distinction matters here: when inventory becomes worthless or unsellable before it’s ever sold, the loss shows up by adjusting that same cost of goods sold figure, not by adding a new deduction elsewhere on the return.
How a write-off typically happens
The general process involves identifying inventory that’s damaged, spoiled, obsolete, or otherwise unsellable, then valuing it down — often to scrap value or zero — and reflecting that lower value in the year-end inventory count. Because ending inventory is subtracted in the cost of goods sold formula, a lower ending inventory value increases the cost of goods sold and, in turn, lowers reported profit for the period. Some businesses formally dispose of the damaged goods, donate them, or document destruction as part of substantiating the write-off, since the loss generally needs to be supportable if it’s ever reviewed.
Documentation that supports the write-off
Because this kind of loss doesn’t show up as a discrete transaction the way paying an invoice does, careful documentation becomes especially important: photos or records of the damage, a physical inventory count showing the adjustment, and a clear explanation of why the goods became unsellable. Businesses that keep this kind of record tend to have a far easier time if a return is ever reviewed, compared to those that simply reduce a number on a spreadsheet with no supporting trail.
How this differs from other kinds of business losses
It’s worth distinguishing an inventory write-off from other deductible losses a business might claim, such as bad debt from an unpaid invoice or ordinary operating losses. Inventory write-offs are specifically about goods that were purchased or produced for sale and never generated revenue, and the mechanics — running through cost of goods sold rather than a standalone deduction — are unique to how inventory is accounted for in the first place.
The bottom line
Unsellable inventory doesn’t vanish from a business’s taxes the way an unpaid expense might; it gets absorbed into the cost of goods sold calculation through a valuation adjustment, which lowers taxable profit in the process. Because accounting methods for inventory vary and rules can be technical, it’s generally worth working through the specific mechanics with a tax professional rather than assuming one method applies universally.