Free Inventory Carrying Cost Calculator
Measure inventory carrying cost percentage instantly using total holding costs and average inventory value with our free inventory management calculator.
When to use this calculator
Inventory carrying cost converts average stock into an annual cash drag from capital, storage, insurance, and obsolescence risk. CFOs and supply chain leads use it to justify turnover targets and smaller MOQs. Update when warehouse rates or cost of capital change.
Methodology and inputs
Annual carrying cost = average inventory value × carrying rate %. Rate typically blends cost of capital, occupancy, handling, shrink, and obsolescence — finance often supplies 18–28% depending on category.
Worked example
Pharma distributor holds $3.8M average inventory at a 24% carrying rate. Annual carrying ≈ $912,000 — $76,000/month invisible overhead. Cutting average inventory 12% saves ~$109,000/year without touching sales if service levels hold.
How to interpret the result
Carrying cost makes excess stock tangible — compare savings to supplier volume discounts before accepting larger MOQ. Rising carrying cost with flat inventory value signals rate inputs moved (e.g., higher interest).
Reviewed by ZBI Tools · Practical finance and operations calculators for SMB teams.
Further reading
For a deeper walkthrough of the concepts behind this tool, see our guide: Read the full analysis guide.
Related hub: Browse all calculators · Analyzers & calculators home · About Zen Box Infinity
Practical questions
Retail or cost value?
Use inventory at book cost for finance-aligned decisions.
Include depreciation on warehouse?
Only if your rate methodology allocates occupancy — do not double-count rent and depreciation.
Per SKU carrying cost?
Allocate by average SKU inventory dollars × rate to find worst offenders.
Formulas
Carrying Cost % = Total Holding Costs ÷ Average Inventory Value × 100
Example: Holding costs EUR 48,000; average inventory EUR 400,000 → 12% carrying cost.
Source: ZBI Business Control Library — inventory-carrying-cost.
FAQ
What is inventory carrying cost?
The annual cost of holding inventory—storage, capital, obsolescence, insurance, handling.
Why track carrying cost %?
It quantifies the price of excess stock and supports EOQ and service-level decisions.