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The Daily Insight

How do you fix ending inventory errors?

Author

James Williams

Published Mar 02, 2026

Inventory errors are usually two-period errors, because the ending inventory of one period is the beginning inventory of the next. To fix inventory errors, reverse the error as soon as it detected, record the correct accounting entries and restate prior-period financial statements.

What happens when you underestimate ending inventory?

Overstating inventory When inventories are overstated it lowers the COGS, because the excess stock in accounting records translates to higher closing stock and less COGS. When ending inventory is overstated it causes current assets, total assets, and retained earnings to also be overstated.

What would happen to the income statement if the amount of ending inventory was incorrectly counted?

On the balance sheet, incorrect inventory amounts affect both the reported ending inventory and retained earnings. If the ending inventory is overstated, cost of goods sold is understated, resulting in an overstatement of gross margin and net income.

Do inventory errors correct themselves?

Inventory errors are often self correcting, meaning that an error in ending inventory Will have a reverse effect on net income in the next accounting period. So over two years, the total net income is correct because the errors offset each other.

How long does it take an inventory error affecting ending inventory to correct itself in the financial statements?

Over a two-year period, misstatements of ending inventory will balance themselves out. For example, an overstatement to ending inventory overstates net income, but next year, since ending inventory becomes beginning inventory, it understates net income. So over a two-year period, this corrects itself.

What is the effect of overstated ending inventory?

If the ending inventory is overstated, cost of goods sold is understated, resulting in an overstatement of gross margin and net income. Also, overstatement of ending inventory causes current assets, total assets, and retained earnings to be overstated.

What happens when an inventory balance is incorrect?

An incorrect inventory balance causes an error in the calculation of cost of goods sold and, therefore, an error in the calculation of gross profit and net income.

What happens to inventory at the end of the year?

The current year’s purchases are recorded in one or more temporary accounts entitled Purchases. At the end of the accounting year, the beginning balance in the account Inventory must be changed so that it reports the cost (or perhaps lower than the cost) of the ending inventory.

How does an inventory error affect net income?

Left unchanged, the error has the opposite effect on cost of goods sold, gross profit, and net income in the following accounting period because the first accounting period’s ending inventory is the second period’s beginning inventory.

When is the unit count of an inventory is incorrect?

Incorrect unit count. Perhaps the most obvious error, this is when the physical count of the inventory is incorrect, resulting in an excessively high or low inventory quantity that is then translated into a valuation error when you multiply it by the unit cost.