What it means
Every unit a company has for sale either gets sold during the period or remains in stock at the end of it. Ending inventory is simply what is left.
It matters for two very different reasons. On the balance sheet, it represents real money tied up in goods that have not yet generated cash, and an unusually large or growing ending inventory can be an early warning sign of slowing sales, overordering or obsolete stock.
On the income statement, it is the other side of the cost of goods sold equation: overstate ending inventory and cost of goods sold is understated, which inflates reported profit, and the reverse understates profit. How ending inventory is valued depends on the cost flow assumption a company uses, most commonly first-in first-out (FIFO), weighted average cost, or, in jurisdictions that permit it, last-in first-out (LIFO).
In a period of rising prices, FIFO tends to leave the most recently and therefore most expensively purchased units in ending inventory, producing a higher inventory value and lower cost of goods sold than weighted average or LIFO would. Ending inventory can be measured by physically counting stock at period end, known as a periodic system, or tracked continuously as each sale and purchase happens, known as a perpetual system.
Many businesses use a perpetual system for day-to-day management but still perform a periodic physical count to verify the recorded figure and catch shrinkage from theft, damage or errors. Because ending inventory feeds directly into cost of goods sold and therefore gross profit, it is also one of the more common places for errors, whether accidental miscounts or, occasionally, deliberate overstatement to flatter reported earnings.
In practice
Real-world examples.
Example
A clothing retailer's ending inventory swells heading into the holiday season as it stocks up ahead of expected demand, then falls sharply in January as the goods are sold.
Example
A furniture importer's ending inventory includes several containers of stock still in transit at year end, which some accounting policies include and others exclude depending on when legal title transfers.
Example
A grocery chain values its ending inventory using weighted average cost, since tracking the exact purchase batch of each individual perishable item under FIFO would be impractical.
Think of it
“Ending inventory is what's left on the shelves at period end-your unsold goods.
Formula
Calculation
Ending Inventory = Beginning Inventory + Purchases minus Cost of Goods Sold
Worked example. A hardware store starts the month with $85,000 of inventory, purchases $60,000 of additional stock during the month, and cost of goods sold for the month is $70,000.
Ending inventory = $85,000 + $60,000 minus $70,000 = $75,000
If a physical count at month end instead finds inventory worth only $71,000, the $4,000 difference is shrinkage, likely from theft, damage or recording errors, and must be written off as an additional cost of goods sold adjustment, since the goods are genuinely no longer there to sell.Case study
Seen in the real world.
A consumer electronics retailer reported strong quarterly profit, but the following quarter's results were unexpectedly weak. An investigation traced the discrepancy to ending inventory. The prior quarter's physical count had been rushed during a store renovation, and a significant batch of returned, damaged goods had been counted as full-value saleable stock rather than written down.
That overstated ending inventory understated cost of goods sold and inflated the prior quarter's profit by roughly $310,000. When the damaged goods were properly written off the following quarter, the cost hit that period's results instead, making it look artificially weak by comparison. The retailer introduced a mandatory separate count and valuation process for damaged and returned stock at every period end afterward, so that ending inventory would never again mix saleable and unsaleable goods at the same value.
Watch out
Common mistakes.
- Valuing damaged, obsolete or returned stock at full cost in ending inventory rather than writing it down to its realistic recoverable value.
- Excluding goods in transit or on consignment inconsistently, which can either overstate or understate ending inventory depending on which way the error runs.
- Assuming a rising ending inventory balance always means the business is growing, when it can equally mean sales are slowing and stock is piling up unsold.
Questions
People also ask.
Does ending inventory become next period's beginning inventory?
Yes. The ending inventory figure at the close of one period is simply carried forward as the beginning inventory of the next.
Why does the inventory valuation method matter if the physical goods are the same?
Because FIFO, weighted average and LIFO assign different costs to which units are considered sold versus remaining, which changes reported ending inventory value and profit even though the actual goods on the shelf never change.
How often should ending inventory be physically counted?
Many businesses count annually at minimum, with higher-value or fast-moving categories counted more often, such as monthly or through continuous cycle counting.
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