Inventory Carrying Cost Optimizer
Calculate total inventory carrying costs and model reduction scenarios. Enter values for instant results with step-by-step formulas.
Worked Examples
Example 1: E-commerce Retailer
Problem:Online retailer holds $2M average inventory. Capital cost 10%, storage 6%, insurance 2%, obsolescence 8%, handling 4%, shrinkage 3%.
Solution:Total rate: 10+6+2+8+4+3 = 33%. Annual cost: $2M × 33% = $660K. This is HIGH. Focus on obsolescence (product mix, demand forecasting) and reduce slow-moving stock.
Result:33% carrying rate | $660K/year | HIGH - reduce obsolescence
Example 2: Manufacturing Firm
Problem:Manufacturer has $5M raw materials and WIP. WACC 8%, warehouse 4%, insurance 1.5%, spoilage 2%, handling 3%, loss 1%.
Solution:Total rate: 8+4+1.5+2+3+1 = 19.5%. Annual cost: $5M × 19.5% = $975K. Good rate for manufacturing. Each 10% inventory reduction saves ~$97K.
Result:19.5% carrying rate | $975K/year | GOOD - maintain efficiency
Example 3: Grocery Distribution
Problem:Grocery distributor: $1M perishable inventory. Capital 6%, cold storage 10%, insurance 2%, spoilage 15%, handling 5%, shrinkage 2%.
Solution:Total rate: 6+10+2+15+5+2 = 40%. Annual cost: $1M × 40% = $400K. High due to cold storage and spoilage. Focus on reducing spoilage through better forecasting and shorter holding periods.
Result:40% carrying rate | $400K/year | HIGH - reduce spoilage, improve turns
Frequently Asked Questions
What is inventory carrying cost?
Carrying cost (or holding cost) is the total expense of storing unsold inventory. It includes capital cost (opportunity cost of money tied up), storage, insurance, obsolescence, handling, and shrinkage. Typically 20-30% of inventory value annually.
Why does inventory have a capital cost?
Money invested in inventory could be earning returns elsewhere (opportunity cost) or requires financing (interest cost). If your cost of capital is 10%, holding $100K inventory costs $10K/year in capital alone.
How do I calculate inventory carrying rate?
Sum all cost components as a percentage of inventory value: capital cost (WACC or opportunity cost), storage (rent, utilities), insurance, obsolescence (writedowns), handling (labor), and shrinkage (theft, damage, errors). Total typically 20-30%.
What's a good inventory carrying cost?
Industry benchmarks: Retail 20-25%, Manufacturing 20-30%, Grocery 15-25%. Lower is better, but too low may indicate understocking. Compare to your industry and track trends.