What Are Inventory Carrying Costs?

Carrying costs — also called holding costs — are the total expenses associated with storing unsold inventory over a period of time. They're often underestimated but can represent a significant portion of a business's operating expenses when fully accounted for.

Carrying costs typically include: warehouse or storage space costs, insurance on stored goods, labor for managing and handling stock, depreciation or obsolescence of products, financing costs (the interest on capital tied up in stock), and shrinkage from theft or damage.

For many businesses, carrying costs amount to a meaningful percentage of total inventory value each year. Reducing them — without creating stockouts — is one of the clearest paths to improving profitability.

Strategy 1: Improve Demand Forecasting

Excess inventory usually starts with inaccurate forecasting. If you're consistently ordering more than you sell, the root cause is often a disconnect between purchasing decisions and actual demand signals.

Improve your forecasting by:

  • Analyzing historical sales data by product, season, and channel.
  • Factoring in upcoming promotions, market trends, or supply disruptions.
  • Using rolling forecasts (updated monthly) rather than annual projections.
  • Collaborating with sales teams who have on-the-ground demand insights.

Strategy 2: Reduce Safety Stock Through Better Supplier Relationships

Safety stock exists because of uncertainty — primarily lead time variability and unreliable supply. If you can reduce that uncertainty, you can safely reduce your safety stock levels without increasing stockout risk.

Work with suppliers to shorten lead times, improve delivery reliability, and share demand data so they can plan better too. The more predictable your supply chain, the leaner you can run.

Strategy 3: Implement Cycle Counting

Inaccurate inventory records mean you often hold more stock than necessary as a buffer against "mystery" discrepancies. Regular cycle counting — auditing a small portion of your inventory on a rotating basis — keeps records accurate, which in turn makes your reorder and safety stock calculations more reliable.

Strategy 4: Identify and Liquidate Slow-Moving Stock

Dead and slow-moving stock is one of the biggest contributors to high carrying costs. Conduct a monthly or quarterly review of inventory by sales velocity and take action on underperformers:

  • Run promotions or clearance sales.
  • Bundle slow sellers with popular products.
  • Return unsold goods to suppliers (if your agreement allows it).
  • Sell through alternative channels (marketplaces, B2B bulk buyers).

Strategy 5: Optimize Reorder Quantities with EOQ

The Economic Order Quantity (EOQ) formula calculates the optimal order size that minimizes the combined cost of ordering and holding inventory:

EOQ = √(2 × Annual Demand × Order Cost ÷ Holding Cost per Unit)

While it involves some simplifying assumptions, EOQ gives you a rational, data-driven starting point for order quantities — helping you avoid the instinct to over-order "just to be safe."

Balancing Efficiency With Service

The goal isn't to minimize inventory at all costs — it's to hold the right amount. Every reduction in carrying costs should be weighed against the risk of stockouts, which carry their own costs: lost sales, expediting fees, and damaged customer relationships.

A well-optimized inventory sits at the intersection of low holding costs and high service levels. Use data, not instinct, to find that balance for your specific business.