Inventory Carrying Cost Calculator

Calculate the annual cost of holding inventory across capital, storage, service, and risk components — typically 20 to 30% of inventory value.

💰 Inventory📐 Carrying cost = capital + storage + service + risk costs💼 Business

Average inventory value

Cost of capital (%)

Storage cost (annual)

Insurance and taxes (annual)

Obsolescence and shrinkage (%)

Handling and admin (annual)

Please enter valid values.

Formula & Reference

Variable	Symbol	Formula	Units
Inventory Carrying Cost Calculator	—	Carrying cost = capital + storage + service + risk costs	currency and percent

Step-by-Step Examples

Example 1

Typical Distributor

Inventory 480,000, capital 9%, storage 36,000, insurance 7,200, obsolescence 4%, handling 18,000.

Capital = 480,000 × 9% = 43,200
Obsolescence = 480,000 × 4% = 19,200
Total = 43,200 + 36,000 + 7,200 + 19,200 + 18,000 = 123,600
Rate = 123,600 / 480,000 = 25.75%

✓ 123,600 annually — 25.75%

Example 2

High Obsolescence

Inventory 300,000, capital 12%, storage 20,000, obsolescence 15%.

Capital = 36,000, obsolescence = 45,000
Total = 101,000 excluding other components
Rate exceeds 33% — obsolescence alone is 15 points

✓ Obsolescence dominates

Example 3

Reduction Benefit

Same distributor cutting average inventory from 480,000 to 380,000.

Capital and obsolescence scale with value
Saving ≈ 100,000 × 13% = 13,000 on those components alone
Plus proportional storage and handling reduction

✓ Meaningful annual saving from lower stock

Real-World Applications

📊

EOQ Input

Carrying cost per unit is a required input to economic order quantity, so getting it right matters downstream.

⚖️

Stock Level Decisions

Knowing the true annual cost of holding inventory changes the calculus on safety stock and order sizing.

💸

Hidden Expense

Carrying cost is spread across several accounts and rarely reported as a single figure, so most businesses underestimate it.

📦

SKU Rationalisation

Applying carrying cost per SKU reveals slow movers whose holding cost exceeds their contribution.

Common Mistakes to Avoid

⚠️

Counting only warehouse rent

Storage is often the smallest component. Capital cost and obsolescence typically dominate, particularly for high-value or fast-changing goods.

⚠️

Omitting the cost of capital

Money tied up in inventory cannot be used elsewhere. This opportunity cost is real even though it never appears as an expense line.

⚠️

Using a generic 25% without checking

The commonly cited range is a starting point. Actual rates vary widely — perishables and electronics run far higher than stable commodities.

Frequently Asked Questions

What is inventory carrying cost? ▾

The total annual cost of holding stock, covering cost of capital, storage, insurance and taxes, handling, and obsolescence or shrinkage.

What is a typical carrying cost rate? ▾

Commonly 20 to 30% of average inventory value annually, though it varies substantially by product type and storage requirements.

Why include cost of capital? ▾

Because money invested in inventory is unavailable for other uses. That opportunity cost is genuine even though it is not an accounting expense.

How does carrying cost affect order quantity? ▾

It is the denominator in the EOQ formula. Higher carrying costs push toward smaller, more frequent orders.

How do I reduce carrying cost? ▾

Improve forecast accuracy, shorten lead times to reduce safety stock, rationalise slow-moving SKUs, and negotiate consignment or vendor-managed inventory.