Inventory Shrinkage: Calculate and Record a Stock Shortage

Inventory shrinkage is the confirmed shortfall between the inventory your records say you have and the inventory a physical count actually finds, after known errors are corrected. Measure it at recorded cost, not selling price. In a perpetual system, record ordinary shrinkage by debiting Cost of Goods Sold (COGS) and crediting Inventory.

Some businesses record the shortage in a separate Inventory Over and Short account instead, so the loss stays visible on its own. A perpetual system updates inventory records with each purchase and sale, providing a current book balance to compare with the physical count.

A short count is a reason to investigate. Goods may be missing, a carton may have been counted in the wrong unit, or a sale may still need to be posted. The cause determines the entry. Booking a shrinkage loss for every initial difference can leave both the inventory records and the explanation wrong.

How to adjust merchandise inventory for shrinkage

Professor Farhat explains the inventory adjustment for shrinkage, loss, or theft (16:52–19:19). Watch this segment on YouTube.

What does a physical inventory count tell you?

Perpetual records show the quantities the business expects to own. Scanning deliveries and sales keeps those records current only for movements the system captures. A leaking container, spoiled product, or unrecorded breakage can remove usable units without triggering a scan. Theft is another possible cause. The count alone cannot distinguish among them.

A business that trusts an overstated quantity may promise customers goods it cannot deliver. Overordering to compensate also carries costs: cash is tied up, shelves fill, and slow-moving goods may become obsolete. Accurate counts help managers decide how much to order and which products need better protection.

For a real reporting example, Target’s fiscal 2025 annual report explains that its shrink estimate is based on historical losses and adjusted to the results of physical inventory counts, which it generally performs at each location once a year, with counts spread throughout the year. Target also notes that a 10 percent change in its 2025 year-end shrink reserve would change cost of sales by about $110 million, which shows how much an estimate like this can matter. See the inventory and cost of sales discussion in Target’s SEC filing.

What Causes Inventory Shrinkage?

A shortage can come from several places. The most common are:

• Shoplifting and other theft by outsiders
• Employee theft
• Damage, spoilage, or breakage that is thrown away without being recorded
• Recording errors, such as a sale, return, or delivery that was keyed wrong or never posted
• Supplier errors, such as a short shipment that was recorded as complete

Some of these are real losses. Others are paper differences that disappear once the error is fixed. That is why the investigation comes before the journal entry.

How to calculate inventory shrinkage at cost

Suppose Alder Pantry’s perpetual system lists 86 bottles of olive oil costing $14 each. Its shelf and stockroom count finds 80 bottles. The manager checks the register and discovers that a two-bottle sale just before closing was recorded as revenue, but its cost entry did not post. There are no other timing or recording errors, and a recount confirms 80 bottles.

The initial difference was six bottles, or $84. Two were sold and their cost belongs with that sale. The remaining four represent a confirmed shortage. The formula is: Shrinkage at cost = (corrected book units − counted units) × recorded cost per unit. Recorded cost is the unit cost shown in the inventory records. If items have different unit costs, calculate each item’s shortage at its own cost and then add the amounts.

The sales price of a bottle is irrelevant to the inventory adjustment. Multiplying four bottles by the shelf price would include a profit the business never earned and remove more cost than Inventory contains for those units.

How Do You Calculate The Inventory Shrinkage Rate?

Shrinkage rate = shrinkage at cost ÷ corrected book inventory at cost × 100.

For Alder Pantry: $56 ÷ $1,176 × 100 = 4.8% (rounded). Using units gives the same answer here: 4 ÷ 84 = 4.8%.

Retailers often report shrink as a percentage of sales instead, so check which base a report or exam question uses before comparing numbers.

Which journal entry records the shortage?

First, post the missing $28 cost of the two-bottle sale. Then record the $56 shortage. The following entries assume Alder uses the ordinary COGS treatment for shrinkage. The revenue side of the sale has already posted.

Inventory now equals $1,204 − $28 − $56 = $1,120, which agrees with the count. Both entries debit the same expense account in this example. Recording the reasons separately lets the manager distinguish the cost of an actual sale from an unexplained shortage.

If an exercise specifies Inventory Over and Short, debit that account for the $56 shortage and credit Inventory. The loss can then be presented separately in the income statement. Using both expense treatments for the same four bottles would double the loss. If investigation instead finds a recording error that overstated the books, such as a purchase posted twice or a return to a supplier that was never recorded, correct that entry instead of booking shrinkage. For example, an unrecorded return of goods bought on account is fixed with a debit to Accounts Payable and a credit to Inventory. An omitted receipt of goods works the other way: it makes the count higher than the records, so it explains an overage, not a shortage.

Common Mistakes When Recording Shrinkage

• Valuing the shortage at selling price instead of recorded cost.
• Booking shrinkage before checking for unposted sales, returns, or miscounts.
• Recording the same missing units in both Cost of Goods Sold and Inventory Over and Short.
• Treating a count overage as shrinkage. An overage needs its own investigation.
• Forgetting that in a basic periodic system, shrinkage is hidden inside cost of goods sold.

Why does a periodic system absorb shrinkage into COGS?

A basic periodic system takes the cost of goods available for sale and subtracts counted ending inventory. It has no running record of how many units should be on hand, so there is nothing to compare the count against to reveal an unexplained shortage. The residual includes the cost of sold goods and any untracked loss.

For example, assume $2,800 of goods were available for sale and counted ending inventory cost $1,120. Periodic COGS is $1,680. If independent records establish that units customers bought cost $1,624, the $56 difference can be identified. Without that separate evidence, the calculation alone gives only the $1,680 total.

For the accounts used at purchase, sale, and period-end, compare perpetual and periodic inventory journal entries. If goods are unfinished or still awaiting production, first identify the correct inventory classification before reconciling the item’s balance.

How Is Abnormal Shrinkage Different From Normal Shrinkage?

Normal shrinkage is the expected loss from ordinary operations, such as minor theft, breakage, and spoilage. It is usually included in cost of goods sold, as in the Alder Pantry example.

Abnormal shrinkage is a loss that is unusual in size or cause, such as a warehouse fire, a flood, or a major break-in. Intermediate accounting textbooks generally show it as a separate loss, often called a casualty loss, instead of folding it into cost of goods sold, so it does not distort gross profit. Any insurance recovery is recorded separately too.

The retail inventory method (an estimating method that converts inventory at selling prices to cost using a cost-to-retail ratio) treats the two differently. Abnormal shrinkage is subtracted from both the cost and retail columns before the cost-to-retail ratio is computed. Normal shrinkage is subtracted only from the retail column, after the ratio is computed. This distinction comes up often in intermediate accounting problems, so it is worth memorizing.

Which Standards And Tax Rules Apply To Inventory Shrinkage?

Under U.S. GAAP, inventory accounting is covered by FASB ASC Topic 330, Inventory. It does not require one specific shrinkage account, which is why textbooks show both the Cost of Goods Sold treatment and the Inventory Over and Short treatment.

For U.S. federal income tax, Internal Revenue Code Section 471(b) lets a business adjust year-end inventory for estimated shrinkage, even when the physical count that confirms the estimate happens after year-end. Two conditions apply: the business must normally count inventory at each location on a regular and consistent basis, and it must adjust its inventory and its estimating method when estimates turn out higher or lower than actual shrinkage. Congress added this rule in 1997. EA candidates should know it.

Key Takeaways

• Inventory shrinkage is the gap between corrected book inventory and the physical count.
• Investigate first. Unposted sales, miscounts, and recording errors are corrected, not booked as shrinkage.
• Measure a confirmed shortage at recorded cost, never at selling price.
• Ordinary entry in a perpetual system: debit Cost of Goods Sold, credit Inventory. Some businesses use Inventory Over and Short instead, but never both for the same units.
• Shrinkage rate = shrinkage at cost ÷ corrected book inventory at cost × 100.
• In a basic periodic system, shrinkage is hidden inside cost of goods sold.
• Unusually large losses, such as a fire or major theft, are generally reported as a separate loss.

Interactive quiz on periodic inventory shrinkage

Test how a physical inventory count determines ending inventory and how shortages and overages affect cost of goods sold (COGS). Answer three questions, then review the explanations.

Practice questions and answers

The corrected book balance is 120 units at $9 each. A reliable count finds 117. What is the ordinary shortage entry?

Three units are missing at $9 each. Debit Cost of Goods Sold $27 and credit Inventory $27 under the ordinary COGS treatment.

A count appears to be short one case. A supervisor finds all 12 bottles on a display away from the regular shelf. What entry is needed?

Include the display in the count. If all quantities now agree, there is no shortage to record. Moving stock within the store did not reduce total inventory.

A periodic-system retailer finds that ending inventory is $150 lower than initially counted. What happens to calculated COGS if all other amounts are correct?

COGS increases by $150. Goods available for sale stays the same, and a smaller ending inventory is subtracted from it, so $150 more cost lands in COGS. The correction alone does not identify its cause.

Frequently asked questions

Does every inventory shortage mean theft?

No. Loss, damage, spoilage, counting mistakes, and transaction errors can produce a difference. Recount and check transaction timing before drawing conclusions.

Would a shortage adjustment create sales revenue?

No. A confirmed shortage removes an asset and recognizes a cost or loss. There is no customer transaction that would support recording revenue.

What if the physical count is higher than the records?

Investigate the overage in the same way. Check for duplicate counts and unrecorded receipts, correct any known error, and then reconcile the remaining difference. An overage is not a shrinkage loss.

Is Inventory Shrinkage An Expense?

Yes. Ordinary shrinkage is a normal cost of selling merchandise. Most businesses include it in cost of goods sold, and some track it first in an Inventory Over and Short account. Either way, it reduces income for the period.

What Is The Journal Entry For An Inventory Overage?

After ruling out counting and recording errors, a business using a perpetual system debits Inventory and credits Cost of Goods Sold (or Inventory Over and Short) for the overage, measured at recorded cost.

Can A Business Estimate Shrinkage Between Physical Counts?

Yes. Many large retailers estimate shrink for the period since the last count using past results, then adjust the estimate when the next count is done. Target describes this approach in its annual report, and U.S. tax law allows it under IRC Section 471(b) when counts are regular and estimates are trued up.

Want more practice like this? Start with the Farhat Lectures free sample course. If you are working through intermediate accounting or preparing for the CPA FAR exam, the full Intermediate Accounting course picks up right where this lesson leaves off.

About The Author

Professor Mansour Farhat teaches the accounting lessons behind Farhat Lectures, an online learning platform for CPA, CMA, and EA candidates and accounting students. He also explains these topics on the Farhat Lectures YouTube channel, including the inventory video embedded at the top of this page.