How Overstock Holding Cost Is Calculated
The longer inventory sits in a warehouse, the more warehousing cost and the opportunity cost of the capital tied up in it keep piling up. Stock that isn't turning into sales generates a hidden cost, so knowing the real holding cost is the first step to better inventory management.
Formula
- Annual Holding Cost Rate = Warehouse Rate + Capital Cost Rate
- Total Holding Cost = Inventory Value × Annual Holding Cost Rate × (Holding Period ÷ 12)
For example, $50,000 of inventory with an 8% warehouse rate, 6% capital cost rate, and a 4-month holding period gives a 14% annual holding cost rate and about $2,333 in holding cost over 4 months.
Frequently Asked Questions
Warehouse rent, staff, and insurance make up the warehousing cost, while the interest or opportunity cost of capital tied up in the inventory makes up the capital cost.
If you financed the inventory with a loan, use the loan's interest rate. If it's your own capital, use the return you could have earned elsewhere as the opportunity cost.
Improve demand forecasting accuracy, clear slow-moving stock with promotions, and order in smaller, more frequent batches to cut down on overstock.