Inventory Carrying Costs Run 12–35%: What That Means for Your Store

Inventory carrying costs represent the total cost of holding unsold goods over a period of time. Most operators anchor to one number: warehouse rent. That's a fraction of the real picture. Carrying costs fall into four categories:

• Reason 01Capital costsThe interest or opportunity cost of money tied up in inventory
• Reason 02Storage costsRent, utilities, warehouse maintenance
• Reason 03Service costsInsurance, property taxes, labor for inventory management, software
• Reason 04Risk costsShrinkage, obsolescence, depreciation

The reason carrying costs range so widely, from 12% to 35%, comes down to product type and turnover speed. A merchant selling commodity hardware with 90-day shelf life sits very differently than someone selling trend-driven apparel that goes stale in 60 days. Fast-moving categories with predictable demand sit closer to 12–18%. Slow-moving, seasonal, or fashion-sensitive inventory pushes toward 30–35%.

What Most Ecommerce Operators Miss

The biggest blind spot is opportunity cost. If $100,000 is sitting in slow-moving inventory, that capital cannot fund a paid acquisition campaign, a new product launch, or a supplier prepayment for better margins. The second blind spot is depreciation on trend-sensitive items. A fashion SKU sitting in your 3PL for six months doesn't just cost storage. It loses value. By the time you move it, you may be discounting 40% just to clear it. US retail shrinkage accounts for 1.62% of bottom-line revenue. That sounds small. On a $2M store, that's $32,400 per year in losses from theft, damage, and counting errors alone.

The core inventory carrying costs formula is straightforward: `Carrying Cost % = (Total Carrying Costs ÷ Average Inventory Value) × 100` To get your average inventory value: `Average Inventory Value = (Beginning Inventory + Ending Inventory) ÷ 2` Here's how to collect the data you need:

Once you have those four buckets totaled, divide by your average inventory value and multiply by 100.

Three Real Calculation Examples

Example 1: Manufacturing Business (22%)

• Example 01Total inventory value$100,000
• Example 02Capital cost$12,000
• Example 03Storage costs$2,000
• Example 04Service costs$3,500
• Example 05Risk costs$4,500
• Example 06Total carrying cost$22,000
• Example 07Carrying cost percentage22%

Example 2: Mid-Size Operation (15.6%)

• Example 01Total inventory value$500,000
• Example 02Storage costs$10,000
• Example 03Risk costs$5,000
• Example 04Service costs$3,000
• Example 05Capital costs$60,000
• Example 06Total carrying cost$78,000
• Example 07Carrying cost percentage15.6%

This mid-size operation likely runs lean, with fast turnover and disciplined reorder points.

H3: Example: Electronics Store With $300K Average Inventory

Here's a detailed breakdown for an electronics retailer:

• Example 01Monthly warehouse rent$2,000 ($24,000/year)
• Example 02Labor for inventory management$3,500/month ($42,000/year)
• Example 03Capital cost at 8% interest$24,000/year
• Example 04Shrinkage and obsolescence$6,000/year
• Example 05Insurance and property taxes$6,000/year
• Example 06Total annual carrying cost$86,000**
• Example 07Carrying cost percentage28%**

Notice that labor alone is $42,000 of that $86,000. Most operators calculate rent and stop there. The real number is nearly four times that figure. For an electronics retailer, 28% is on the high end. Gadgets depreciate fast. A product sitting unsold for six months may need a 20–30% discount just to move. That depreciation compounds the carrying cost exposure beyond what the formula captures.

Storage feels tangible. You get a monthly invoice. You can point to it. Capital cost is invisible, which is exactly why it gets ignored. And in most carrying cost calculations, capital cost is the single largest component. If you're borrowing to fund inventory, you're paying interest directly. If you're using your own cash, you're paying in foregone returns. Either way, the money has a cost. Here's a concrete scenario. You invest $10,000 in a slow-moving SKU. That inventory generates $10,000 in revenue over 12 months. Meanwhile, putting that same $10,000 into a well-targeted paid social campaign could have returned $15,000 in gross revenue. That's a $5,000 opportunity cost. It never shows up on an invoice. It just disappears quietly into your P&L as underperformance.

Deadstock Is the Worst Version of This Problem

Deadstock is inventory that sits unsold and keeps accumulating costs with zero revenue return. It's the financial equivalent of paying rent on an empty room. US retail shrinkage at 1.62% sounds manageable. But shrinkage compounds with obsolescence. A $500,000 inventory position generating 1.62% in losses is $8,100 per year in pure waste, before you count the storage and labor spent managing those dead units. Treating finished goods as short-term assets that must move quickly is not just good practice. It's a survival principle for maintaining healthy cash flow.

Carrying cost percentage should be a monthly metric, not an annual accounting exercise. By the time your year-end numbers arrive, the damage is already done. Here's how to set up tracking that actually drives decisions: Step 1: Set your baseline. Calculate your current carrying cost percentage using the formula above. This is your starting benchmark. Step 2: Define your target range. Based on your product category and turnover rate, set a target. Most ecommerce operators should target 15–25%. Step 3: Track monthly. Review carrying cost percentage every month. Flag any movement above 30% for immediate investigation. Step 4: Pair it with inventory turnover. Carrying cost percentage alone doesn't tell the whole story. A 20% carrying cost with a high turnover rate is healthy. The same 20% with slow turnover means you're bleeding cash. Step 5: Use software. Manual tracking is slow and error-prone. In 2026, there's no good reason to run inventory KPIs from memory and spreadsheets alone.

Warning Signs to Watch For

• Step 01Carrying costs trending above 30% for two consecutive months
• Step 02SKUs with 90+ days of no movement in the warehouse
• Step 03Warehouse space utilization below 60%
• Step 04Increasing write-offs and adjustments on monthly counts

Any one of these signals that inventory is accumulating faster than it's moving. The carrying cost percentage will confirm it numerically.

Tactic 1: Improve Demand Forecasting

Overstocking is the root cause of high carrying costs. And overstocking usually starts with bad forecasting. Combine three data inputs: historical sales velocity by SKU, current market and trend signals, and direct input from your sales and marketing teams on expected demand shifts. Update forecasts monthly, not quarterly. Static projections become outdated fast in fast-moving categories.

Tactic 2: Implement ABC Classification

ABC classification segments inventory into three tiers:

• Strategy 01A itemsTop 20% of SKUs driving roughly 80% of revenue
• Strategy 02B itemsMid-tier SKUs with moderate volume
• Strategy 03C itemsBottom tier with low velocity and high carrying cost relative to return

Once classified, prioritize capital and warehouse space for A items. Reduce reorder quantities on C items. Review whether C items should exist in your catalog at all.

Tactic 3: Negotiate Smaller, More Frequent Deliveries

Bulk orders lower per-unit cost but spike carrying costs. Work with suppliers to shift toward smaller batch deliveries on a more frequent schedule. You may pay slightly more per unit. But reducing average inventory on hand by 20–30% can cut carrying costs enough to more than offset the unit cost difference.

Tactic 4: Liquidate Deadstock Aggressively

Run quarterly audits. Any SKU with 90+ days of no movement gets flagged immediately. Options for liquidation:

• Strategy 01Run a flash sale or bundle promotion
• Strategy 02Offer to wholesale the units at cost to a liquidator
• Strategy 03Donate for a tax write-off if the economics make sense

Holding deadstock longer in hopes of full-price recovery almost never works. The carrying costs will eat whatever margin you're trying to protect.

Tactic 5: Optimize Warehouse Layout

Slotting optimization means placing your fastest-moving SKUs in the most accessible warehouse positions. It reduces pick time, labor cost, and handling errors. Fast movers near the shipping dock. Slow movers in the back. Use vertical storage to maximize cubic footage without expanding your footprint. This doesn't require a warehouse redesign. Spending one day reorganizing your top 20% of SKUs by velocity can meaningfully reduce labor costs.

H3: When Just-In-Time Inventory Makes Sense for Ecommerce

Just-in-time (JIT) inventory means ordering stock only when demand requires it. The benefit is near-zero carrying costs. The risk is stockouts if demand spikes or suppliers miss delivery windows. JIT works best under these conditions:

• Strategy 01Predictable, consistent demand with low variance
• Strategy 02Domestic or near-shore suppliers with 3–7 day lead times
• Strategy 03Strong supplier relationships with reliable fill rates

A practical hybrid approach works better for most Shopify merchants. Use JIT principles for your top A items with fast, predictable velocity. Maintain safety stock for B items and anything with supply chain variability. Don't apply JIT across the board just to cut costs. A stockout on your top-selling SKU during peak season will cost more than six months of carrying costs.

Manual calculation works for your first baseline number. It doesn't work as an ongoing system.

Excel Inventory Carrying Costs Calculator

An inventory carrying costs Excel template should include four tabs:

A fifth summary tab pulls totals and automatically calculates your carrying cost percentage. Add a month-over-month comparison column to spot trends. This is the foundation of an inventory carrying costs calculator approach before you move to dedicated software.

Inventory Management Software

For 2026, any platform you use should have:

• Insight 01Real-time inventory visibility across locations
• Insight 02Automated reorder point alerts
• Insight 03Built-in cost tracking that separates carrying cost categories
• Insight 04Integration with your Shopify storefront for demand-side data
• Insight 05Mobile warehouse management for accurate cycle counts

Accurate cycle counts directly reduce shrinkage. Better data means better forecasting. Both reduce carrying costs downstream.

RFID and Barcode Scanning

Barcode scanning and RFID technology reduce shrinkage by improving count accuracy and reducing manual entry errors. For any store holding $200K+ in inventory, the ROI on scanning infrastructure is typically fast. RFID is especially valuable for high-volume operations where manual counts are slow and error-prone.

Your carrying cost percentage is a diagnostic number. Here's how to read it: 12–18%: Highly Efficient You're running lean. Strong demand forecasting, fast turnover, or JIT principles at work. Verify you're not cutting so close that stockouts are a real risk. Check your fill rate alongside this number. 19–25%: Healthy and Balanced This is the standard benchmark range for well-run ecommerce operations. You're holding enough to fill demand without excess. Focus on maintaining this range as you scale. 26–35%: Approaching Inefficiency You likely have excess safety stock, slow-moving SKUs accumulating in the warehouse, or capital tied up in inventory that should have been liquidated. This range is fixable with targeted action. Above 35%: Structural Problem This is a red flag. You're probably holding too much inventory, dealing with significant deadstock, or operating in oversized warehouse space. At this level, carrying costs are actively compressing your margins.

Don't Read a Single Number in Isolation

A one-month snapshot can be misleading. Seasonal businesses naturally spike carrying costs during buildup periods. Track the trend over 6–12 months. A percentage that's rising consistently is a structural problem. A percentage that spikes in October and normalizes in January is seasonal. Treat them differently. Pair carrying cost percentage with inventory turnover rate for a complete picture. High carrying costs with high turnover means you're paying to hold inventory that moves well. You can probably cut safety stock. High carrying costs with low turnover means you have a demand or purchasing problem that needs immediate attention.

Knowing your carrying cost percentage is only useful if it drives action. Here's a four-week execution plan. Week 1: Calculate Your Baseline Gather all cost data across the four categories: capital, storage, service, and risk. Calculate your current carrying cost percentage using the formula. Build or download an inventory carrying costs Excel template to organize the data cleanly. Week 2: Audit Your Inventory Run a full inventory audit. Flag every SKU that hasn't moved in 90+ days. Identify your bottom 20% by turnover rate. Note any items approaching obsolescence or seasonal expiration. Week 3: Build Your Action Plan Set a target carrying cost percentage. Identify your top three cost reduction opportunities from the audit. Recalculate reorder points for your top 10 SKUs based on actual demand data rather than historical defaults. Recalculating reorder points manually is where most operators stall. Monocle's Reorders page lets you group products by supplier, get AI-suggested quantities based on your coverage days, and turn those numbers into a purchase order you can send directly. If you want to move from spreadsheet guesses to data-driven reorders, click the top right "Get started today" button. Week 4: Execute Quick Wins

• Insight 01Launch a liquidation promotion for all 90-day deadstock
• Insight 02Contact one key supplier about shifting to smaller, more frequent deliveries
• Insight 03Reorganize warehouse layout to move your top 20% velocity SKUs to the most accessible positions

Set Up Ongoing Tracking

After week four, build a monthly rhythm. Review carrying cost percentage and inventory turnover rate together on the first week of each month. Schedule a quarterly review to reassess targets, absorb seasonal patterns, and adjust purchasing strategy based on what the data shows. Inventory carrying costs don't fix themselves. But with monthly visibility and quarterly recalibration, you can systematically move from the 28–35% range down to 18–22%, freeing up tens of thousands of dollars in cash that's currently sitting on a warehouse shelf. The shift to smaller, more frequent supplier orders only works if creating purchase orders is fast enough to justify the extra frequency. Monocle lets you select items from a single supplier view, set coverage days for AI-calculated quantities, and send the PO with one click. No reason to let process friction keep you ordering in bulk. Click the top right "Get started today" button.