Inventory Carrying Cost Calculator

What inventory carrying cost means

Inventory carrying cost (also called inventory holding cost) is the total annual cost of holding unsold stock. It covers more than storage rent: it also includes the return you give up on the capital tied up in that stock, the labor to manage it, insurance, taxes tied to inventory value, and losses from shrinkage, damage, and obsolescence. Businesses use it to decide how much inventory to carry, whether to negotiate different supplier terms, and how to compare the true cost of stocking policies.

Assumptions used

• All amounts you enter are treated as already-annual figures, in the currency you select.
• The currency selector changes formatting only; it does not convert values between currencies.
• Quick mode applies a single rate to your average inventory value and does not break the result down by cost driver.
• Advanced mode sums the individual annual costs you enter; any cost you leave blank is treated as zero, not estimated for you.
• This is a planning estimate. It does not apply any specific accounting standard, tax treatment, or jurisdictional rule.

Formula and methodology

Quick mode

Annual carrying cost = average inventory value × carrying-cost rate ÷ 100.
Monthly carrying cost = annual carrying cost ÷ 12.

Advanced mode

Capital cost = average inventory value × cost-of-capital rate ÷ 100.
Total annual carrying cost = capital cost + storage + labor and handling + insurance + taxes + shrinkage + damage + obsolescence + administration and other.
Monthly carrying cost = total annual carrying cost ÷ 12.
Calculated carrying-cost rate = total annual carrying cost ÷ average inventory value × 100.

Each advanced cost field is counted exactly once; the calculator does not add any hidden component on top of what you enter.

Worked example

Example scenario (illustrative only, not an industry benchmark): a company with an average inventory value of $500,000, a cost-of-capital rate of 8%, and the following annual costs: storage $8,000, labor and handling $12,000, insurance $2,500, taxes $3,000, shrinkage $6,000, damage $1,500, obsolescence $4,000, and administration $2,000.

Capital cost = $500,000 × 8% = $40,000. Total annual carrying cost = $40,000 + $8,000 + $12,000 + $2,500 + $3,000 + $6,000 + $1,500 + $4,000 + $2,000 = $79,000. Monthly carrying cost = $79,000 ÷ 12 = $6,583.33. Calculated carrying-cost rate = $79,000 ÷ $500,000 × 100 = 15.8%. In this example, the largest single cost driver is the cost of capital.

Use the “Load example” button above to load this exact scenario into the calculator.

How to interpret the result

The annual and monthly figures show what holding your current average inventory is estimated to cost you per year and per month. The calculated carrying-cost rate lets you compare that cost against your inventory value as a single percentage, useful for benchmarking against your own targets over time. In Advanced mode, the largest cost driver points to where a reduction would have the biggest impact — for example, a high capital-cost share suggests reducing average inventory or its cost of financing would help more than trimming storage costs.

Limitations

• This calculator does not model seasonality, safety-stock policy, or inventory turnover directly.
• It does not apply any specific accounting standard, and actual accounting or tax treatment of carrying costs can vary by company and jurisdiction.
• Results are only as accurate as the figures you enter; this tool does not estimate any value on your behalf.
• This is a planning estimate, not accounting, tax, legal, or financial advice.

How carrying cost fits with safety stock, reorder point, and EOQ

The carrying-cost rate you use here also drives the holding-cost input in the Economic Order Quantity (EOQ) Calculator. See the Inventory Planning Formulas guide for one worked scenario that carries carrying cost, EOQ, safety stock, and reorder point through together.