What Is Inventory Carrying Cost?
Inventory carrying cost, also called holding cost, is the annual expense of keeping unsold products in stock. It includes the cost of cash tied up in inventory, storage, insurance, shrinkage, obsolescence, and handling.
For an e-commerce business, these costs affect pricing, cash flow, and the profit left after products sell. A product can have a strong gross margin and still underperform if it sits in storage for months or loses value before sale.
Inventory Carrying Cost Formulas
Total Carrying Cost Rate =
Capital Cost % + Storage Cost % + Insurance % + Shrinkage %
+ Obsolescence % + Handling %
Annual Carrying Cost =
Average Inventory Value × Total Carrying Cost Rate
Carrying Cost as % of Revenue =
Annual Carrying Cost ÷ Annual Revenue × 100
Average Carrying Cost per SKU =
Annual Carrying Cost ÷ Total SKUs
The per-SKU result is an average across your catalog. It is not the actual cost of each product unless inventory value and carrying costs are distributed evenly.
How to Use This Calculator
- Enter Average Inventory Value — use the average value of inventory at cost over the period, not its retail value. Use a monthly or quarterly average if your stock level changes significantly through the year.
- Enter Capital Cost %, Storage Cost %, Insurance %, Shrinkage %, Obsolescence %, and Handling % — estimate each expense as a percentage of average inventory value. Include warehouse rent and utilities in storage, and labor for moving or counting stock in handling.
- Enter Annual Revenue — the calculator uses this to show carrying cost as a share of sales.
- Enter Gross Margin — use gross profit divided by revenue. This gives context for how much gross profit carrying costs consume; it does not include operating expenses.
- Enter Total SKUs — use the number of active SKUs to estimate average carrying cost per SKU. The figure is a broad allocation, so investigate individual products separately.
- Review the reduction scenarios — compare modeled cost reductions with your current estimate. Treat the savings as scenarios, not guaranteed results; a reduction is realistic only if you can make the operational change behind it.
Step-by-Step Example
Suppose a Shopify store holds $120,000 in average inventory at cost and sells $750,000 per year. Its estimated annual carrying cost components are:
| Cost component | Calculation | Annual cost |
|---|---|---|
| Capital | $120,000 × 12% | $14,400 |
| Storage | $120,000 × 6% | $7,200 |
| Insurance | $120,000 × 1.5% | $1,800 |
| Shrinkage | $120,000 × 2% | $2,400 |
| Obsolescence | $120,000 × 5% | $6,000 |
| Handling | $120,000 × 2.5% | $3,000 |
| Total | $120,000 × 29% | $34,800 |
The carrying cost is $34,800 per year. Divide $34,800 by $750,000 to get 4.64% of annual revenue. With a 52% gross margin, gross profit is $750,000 × 52% = $390,000; carrying cost therefore uses $34,800 ÷ $390,000 = 8.92% of gross profit. Across 150 SKUs, the average is $34,800 ÷ 150 = $232 per SKU per year.
A modeled 10% reduction in carrying costs would save $34,800 × 10% = $3,480 annually. Check which components can actually fall before using that figure in a budget.
What Drives Carrying Cost?
Capital cost measures the return you give up by holding cash in stock instead of using it elsewhere. Storage, insurance, and handling tend to reflect operating choices; shrinkage and obsolescence often reveal control or forecasting problems.
The U.S. Small Business Administration’s cash-flow guidance explains why cash tied up in business operations matters. For broader market context, the U.S. Census Bureau publishes monthly retail inventory and sales data; compare trends cautiously because retail-wide ratios do not set a target for an individual store.
Carrying cost and inventory turnover are connected: faster-selling stock spends less time exposed to annual holding costs, but high turnover alone does not prove a product is profitable. Compare carrying cost with gross profit and stockout risk, and use the Inventory Turnover Calculator to review turnover alongside days sales of inventory and GMROI. For stock aging, the Dead Stock Identifier can help compare holding on to items with markdown or liquidation options.
Industry Benchmarks
Use these ranges as starting estimates, then replace them with your own accounting and warehouse data. Product shelf life, seasonality, storage needs, and supplier lead times can move a business outside typical ranges.
| Product or cost measure | Typical annual range |
|---|---|
| Fast-moving, shelf-stable products | Under 20% total carrying cost |
| Most direct-to-consumer inventory | 20–30% total carrying cost |
| Fashion and seasonal products | 25–35% total carrying cost |
| Commodity products | 15–22% total carrying cost |
| Capital cost | 8–15% |
| Storage | 3–8% |
| Insurance | 1–3% |
| Shrinkage | 1–3% |
| Obsolescence | 2–8% |
| Handling | 1–3% |
The ranges for individual components do not necessarily add up to the category ranges: each business has a different mix of costs. Inventory-management research from NC State’s Supply Chain Resource Cooperative also emphasizes the role of inventory information and controls, which can help a merchant identify where estimates need better data.
6 Experiments to Reduce Carrying Costs
- Test a smaller replenishment batch: Change a 12-week supply target to 8 weeks and check whether lower average stock offsets any added freight or ordering costs.
- Review slow movers: Filter Shopify inventory by days since last sale, then test a 15% markdown on products that have not sold in 90 days. Compare the expected cash recovered with the cost of continued storage.
- Separate high-value SKUs: Use the ABC Inventory Analysis Tool to focus cycle counts and purchasing reviews on SKUs that account for the most inventory value.
- Test storage alternatives: Ask your warehouse or 3PL for a quote based on pallet space, pick fees, and minimums; compare the full quote rather than rent alone.
- Reduce seasonal exposure: Change a seasonal purchase plan from one large order to staged deliveries, then compare storage and obsolescence estimates against any supplier price premium.
- Check reorder settings: Compare current safety stock with supplier lead-time variability using the Reorder Point Calculator. Lower buffers only when the stockout risk remains acceptable.
Frequently Asked Questions
What is inventory carrying cost?
Inventory carrying cost is the total annual expense of storing unsold inventory, including capital, storage, insurance, shrinkage, obsolescence, and handling. E-commerce businesses often use 20–30% of average inventory value per year as a planning range, then refine it with their own cost records.
What is a good inventory carrying cost percentage?
A useful target depends on product type, stock velocity, and storage model; compare your result with the ranges in the benchmark table rather than treating one percentage as universal. A high rate can point to slow-moving stock, expensive storage, losses, or inventory that is becoming outdated.
How do you calculate carrying cost per unit?
Divide annual carrying cost by the number of units held to estimate the annual holding cost per unit. For product-level decisions, use each SKU’s own inventory value and unit count; the calculator’s per-SKU average is less precise when catalog items differ greatly in value or volume.
How can I reduce inventory carrying costs?
Reduce excess stock, improve turnover, prevent losses, limit obsolete inventory, and use storage space more efficiently. Before cutting stock, compare the expected savings with lead times and the cost of stockouts; a cheaper inventory position can still lose sales if replenishment is unreliable.
What is the relationship between carrying cost and inventory turnover?
Higher turnover generally means products spend less time in inventory and incur less holding cost per unit sold, assuming other costs stay similar. But turnover does not show whether sales are profitable by itself, so compare it with gross margin, stockout risk, and the carrying cost of the inventory.
About This Calculator
The Inventory Carrying Cost Calculator was built by Luis Dev Studio for Shopify merchants to estimate carrying costs and test reduction scenarios. For help applying the results to your store, contact us.
Updated by Luis Gonzalez · Aug 30, 2026