Inventory Shrinkage

Inventory shrinkage, often shortened to shrink, is the difference between the amount of inventory a business's records show it should have and the amount it actually has when a physical count is made. If the inventory system says a store should hold $500,000 of goods but a count finds only $490,000, the $10,000 shortfall is shrinkage. It is a loss: goods have disappeared without producing any revenue. In retail it is usually just called shrinkage.

Shrinkage is a significant problem in retail, where goods are on open display and handled by many people, but it affects wholesalers, manufacturers and restaurants too. Industry surveys by the National Retail Federation have put average retail shrink at around 1.4 to 1.6 percent of sales in recent years, which amounts to more than $100 billion a year across the US retail sector. Because retail margins are thin, even small changes in shrink can have a large effect on profit.

Shrinkage has several main sources:

• External theft, such as shoplifting and organized retail crime.
• Internal theft by employees, including taking goods, giving unauthorized discounts to friends and processing false refunds.
• Administrative and process errors, such as miscounts, incorrect pricing, receiving errors and goods recorded under the wrong code.
• Vendor fraud or errors, where suppliers deliver less than was invoiced.
• Damage, spoilage and expiry, especially for perishable goods, though some businesses report these separately from shrink.

Shrinkage can only be measured where a business has an expected figure to compare with a count. Under a perpetual inventory system, the expected balance is the running total in the records. Shrinkage is usually expressed as a percentage of sales:

Here $\text{Book inventory}$ is the value of inventory according to the records at cost or retail, $\text{Physical inventory}$ is the value actually counted, and $\text{Sales}$ is net sales for the same period. A clothing store with book inventory of $820,000 and a counted figure of $802,000, measured at retail prices, and annual sales of $1,200,000 has shrinkage of $18,000, a rate of 1.5 percent.

Under a periodic system, shrinkage is hidden: cost of goods sold is calculated as beginning inventory plus purchases minus ending inventory, so missing goods simply end up in cost of goods sold. Retailers using the retail method estimate expected inventory from sales and markups to reveal it.

When a count reveals shrinkage, the inventory records are adjusted to the physical count. Using cost figures, a company that finds a $10,000 shortfall debits an inventory shrinkage or inventory loss account and credits inventory for $10,000. Most companies include normal shrinkage in cost of goods sold, which reduces gross profit. Unusual losses, such as a major theft or a fire, may be reported separately as a loss, and any recovery from insurance is recorded when a claim is probable. Because counts may not happen at every month end, businesses often accrue estimated shrinkage between counts, based on historical rates, so that interim results are not overstated. Losses from waste beyond normal levels are related to abnormal spoilage in manufacturing.

Businesses fight shrinkage with a mix of physical, procedural and technological controls. These include security tags, cameras and staff training; separating duties so that no single person orders, receives and records goods; checking deliveries against purchase orders; regular cycle counts of high-value items; exception reports on refunds, voids and discounts; and background checks under know-your-employee procedures. Retailers increasingly use data analytics and item-level RFID tags to locate where losses occur. Regular account reconciliation between the inventory ledger and counts helps detect problems early.

Shrinkage directly reduces profit and distorts key measures such as gross margin and inventory turnover. Unexplained or rising shrink can also signal fraud, weak controls or misstatement of inventory on the balance sheet, which is why auditors pay close attention to it during inventory observation.