Updated 2026: Many eCommerce businesses struggle to balance inventory availability with operational costs. Carrying too much inventory increases storage expenses, while carrying too little can lead to stockouts and lost sales. Understanding how to decide inventory levels helps businesses improve cash flow, maintain customer satisfaction, and operate more efficiently across multiple sales channels.
Too much inventory in your warehouse means that you have too much of cash tied up in the warehouse shelves. If you can somehow reduce the amount of inventory in your warehouse, that reduction directly translates into free cash that you can use to run other aspects of your business. And deciding how much to stock for each item is not too hard either. In this article, I will give you 4 easy tips for good inventory management.
Here are 4 questions to ask while deciding how much to stock of each item.
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How Predictable Is Customer Demand?
Understanding sales patterns and seasonal demand helps businesses avoid overstocking or running out of inventory during high-volume periods. -
How Quickly Can Inventory Be Replenished?
Supplier lead times directly impact inventory planning. Businesses with slower suppliers often need higher safety stock levels to prevent stockouts. -
What Are the Costs of Carrying Inventory?
Storage fees, dead stock, insurance, and warehouse space all contribute to inventory carrying costs. Businesses should evaluate whether excess inventory is creating unnecessary operational expenses. -
How Accurate Is Inventory Visibility Across Channels?
Businesses selling across multiple marketplaces need accurate inventory synchronization to prevent overselling and fulfillment issues.
Platforms like Ordoro help eCommerce businesses centralize inventory tracking and improve visibility across multiple sales channels.
Why Inventory Planning Matters More Today
Modern eCommerce businesses often manage inventory across websites, marketplaces, warehouses, and fulfillment partners simultaneously. Without accurate inventory planning, businesses risk fulfillment delays, overselling, and poor customer experiences.
If the item is cheap (e.g., pencils that cost $0.50 a piece) then there is no harm in stocking up a large quantity. Particularly if the supplier gives you discounts for ordering large quantities (batches > 1000 units). Even if you have to stock 1000 units, you are tying up only $0.50*1000 = $500.
But what if each unit costs $100 (e.g. jewelry). The more you stock, the more cash you are tying up (e.g. 200 units will cause 200*$100 = $20,000 to be tied up). That is $20,000 out of your revolving credit line (or your credit card credit limit).
However, just because an item is expensive, does not mean you shouldn’t stock it in large quantities. What if you are selling the jewelry item mentioned above at a rate of 10 units a day? So you are carrying only 200/10 = 20 days of inventory. Which may not be a bad deal at all.
Why Supplier Lead Times Matter
For the same item, let us say it takes 30 days for you to receive a new shipment from the vendor, counting from the day you place a purchase order. Now you are in trouble. Even if you place an order today, you will receive the shipment only 30 days from now. But you have only 20 days worth of inventory in stock. So for the last 10 days, you are out of stock, and therefore you are losing 10 days worth of sales.
And finally, you should consider the vendor’s minimum order size. If the vendor requires you to order in batches of 500 units (for the jewelry item mentioned above), now you need to pony up 500*$100 = $50,000 in cash to purchase the inventory. At a rate of 10 units a day, it will take you 500/10 = 50 days to sell the inventory.
I hope these ideas explain the intuition behind deciding inventory levels. In a future article, I will explain how to use the concept of “cost of money” to make financial sense of these intuitive ideas.
Why Inventory Planning Matters More Today
Modern ecCmmerce businesses often manage inventory across websites, marketplaces, warehouses, and fulfillment partners simultaneously. Without accurate inventory planning, businesses risk fulfillment delays, overselling, and poor customer experiences.
Frequently Asked Questions
Why are inventory levels important?
Proper inventory levels help businesses avoid stockouts, reduce storage costs, and improve customer satisfaction.
What causes inventory problems?
Poor forecasting, inaccurate inventory tracking, and long supplier lead times often create inventory management challenges.
How do eCommerce businesses improve inventory visibility?
Businesses improve visibility through centralized inventory management systems and real-time stock synchronization.
Determining inventory levels requires balancing customer demand, operational costs, and supplier reliability. Businesses that improve inventory visibility and forecasting are better positioned to scale efficiently while avoiding costly fulfillment problems. To learn how eCommerce businesses streamline inventory management and fulfillment workflows, talk to an Ordoro expert today.
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