Inventory Carrying Cost: Formula, Examples & How to Reduce It

Inventory carrying cost is the total cost of holding inventory over time. It includes more than the purchase price of the products. Cash tied up in stock, storage, insurance, handling, shrinkage, spoilage, and obsolescence can all contribute.

Inventory carrying cost formula

A common approach is:

Carrying Cost Percentage = Annual Inventory Holding Costs ÷ Average Inventory Value × 100

You can also estimate annual carrying cost in dollars by multiplying average inventory value by the carrying-cost percentage.

Carrying cost example

Assume average inventory value is $200,000 and annual holding-related costs total $40,000.

Carrying Cost Percentage = $40,000 ÷ $200,000 × 100 = 20%

The business is spending the equivalent of 20% of average inventory value each year to carry that stock under this cost definition.

What inventory carrying cost includes

Cost of capital

Money tied up in inventory cannot be used elsewhere in the business. The financing or opportunity cost of that capital is often one of the largest components.

Storage

Warehouse space, stockroom space, shelving, utilities, and third-party storage can all contribute.

Insurance and taxes

Depending on the business and jurisdiction, inventory may create insurance or tax-related holding costs.

Handling and administration

Counting, moving, managing, and maintaining inventory requires labor and systems.

Shrinkage

Theft, damage, spoilage, and other inventory losses increase the effective cost of carrying stock. See the inventory shrinkage guide for causes and controls.

Obsolescence

Products can lose value when trends change, packaging changes, technology advances, or shelf life expires.

How to reduce inventory carrying cost

Improve forecasting

Better demand planning can reduce purchases that exceed likely demand.

Review safety stock

Buffers should be large enough to manage real uncertainty, not permanently inflated because they were set once and forgotten. See the safety stock formula guide.

Improve reorder points

High reorder thresholds can create unnecessary inventory. See the reorder point guide.

Reduce dead stock

Dead inventory creates carrying cost without supporting normal sales. Identify it early and take deliberate action.

Use transfers before new purchases

Multi-location businesses can often rebalance inventory between stores rather than increasing total company stock.

Negotiate supplier terms

Smaller minimum order quantities, more frequent deliveries, or better lead times can reduce the amount of buffer stock required.

Carrying cost vs. purchase price

A product with a low unit cost can still be expensive inventory if it requires large minimums, sells slowly, occupies a lot of space, or becomes obsolete quickly.

Carrying cost and inventory turnover

Slow turnover typically increases the amount of time capital remains tied up in stock. Reviewing inventory turnover and DSI alongside carrying cost can show where excess inventory is reducing efficiency.

How Stash fits

Stash helps physical businesses connect inventory, purchasing, forecasting, suppliers, and location-level stock. Better visibility into what is moving, what is already on order, and what is sitting can support lower carrying costs without blindly cutting inventory.

Frequently asked questions

Is carrying cost the same as storage cost?

No. Storage is only one component. Carrying cost can also include capital, insurance, shrinkage, handling, and obsolescence.

What is a good carrying cost percentage?

There is no universal percentage for every industry. Businesses should define the cost components consistently and compare trends over time and against relevant benchmarks.