Amazon FBA Inventory Management: How to Optimize Storage Fees and Maximize Your IPI Score

Managing Excess and Aged Inventory

Despite best efforts, excess inventory accumulates. The key is managing it before it becomes a financial disaster through aged inventory surcharges.

Removal and Liquidation Strategies

Once you've identified excess inventory, you have several options:

Removal Orders: You can request that Amazon physically remove inventory from their fulfillment centers. This costs approximately $0.50-$2.00 per unit depending on product size. For low-value inventory, the removal cost may exceed the product value.

Liquidation: Amazon's official liquidation channel sells overstock at steep discounts. You receive a percentage of the discounted sale price. While the financial return is minimal, it's often better than incurring aged inventory surcharges for months.

Outlet Deals and Promotions: Running aggressive sales and promotions can move excess inventory if demand exists. Deep discounts (30-50% off) combined with enhanced visibility can substantially increase sales velocity.

For more detailed guidance on addressing excess inventory challenges, our Amazon excess inventory guide covers strategies specific to different scenarios and product categories.

Stranded Inventory: Causes and Solutions

Stranded inventory is particularly frustrating because it represents inventory you own but cannot sell. Amazon flags these as inactive and penalizes your IPI score aggressively.

Common Causes of Stranded Inventory

• Missing Product Information: Incomplete listings lacking images, descriptions, or required product information are suppressed.

• Pricing Issues: Products priced above market rate or with formatting errors become unsellable.

• Compliance Issues: Products that violate Amazon's policies get suppressed. Refer to our seller policy compliance guide to ensure all listings comply.

• UPC or Barcode Problems: Incorrect or missing barcodes prevent proper inventory tracking.

• Category Restrictions: Some categories require approval, and unapproved sellers' listings get suppressed.

We recommend a monthly stranded inventory audit for all sellers. Catching and fixing stranded products within 30 days typically prevents them from triggering significant IPI penalties.

FBA Capacity Limits and How They Work

Your FBA capacity is the maximum amount of inventory you can store in Amazon's fulfillment centers at any given time. This limit is directly tied to your IPI score and historical inventory levels.

For sellers with an IPI score of 500 or above, capacity is typically set generously. Below 500, capacity drops to 50-80% of your historical peak, which can create severe constraints during peak seasons.

If you're hitting capacity limits, strategies like inventory rotation, SKU consolidation, and just-in-time inventory can help. But the fundamental solution is to grow your IPI score by addressing excess and stranded inventory issues.

Seller Central Tools for Inventory Management

Amazon provides several tools within Seller Central specifically designed for inventory management:

• IPI Dashboard: Shows your current score, historical trend, and the specific metrics driving your score.

• Inventory Age Report: Breaks down your inventory by age cohorts (0-90, 90-180, 180-365, 365+ days).

• Stranded Inventory Report: Identifies all stranded inventory and categorizes the reason for each product's status.

• Excess Inventory Report: Flags inventory considered excess based on Amazon's algorithm.

• Sales and Traffic Dashboard: Shows detailed sales velocity by product for demand forecasting.

We export these reports monthly and use them to identify immediate action items for our clients.

Lab 916's Approach to Inventory Optimization

At Lab 916, inventory management is one of the core services we provide for our Amazon seller clients. Our approach combines data analysis, strategic planning, and disciplined execution.

We begin every engagement with a complete inventory audit, analyzing IPI score history, current composition, age distribution, and performance metrics. If a client's IPI score is suboptimal, we identify the specific factors driving the problem and develop a customized optimization plan.

Our clients typically see IPI score improvements from below 500 to 700+ within 90-180 days, monthly storage fee reductions of 20-40%, and elimination of aged inventory surcharges through proactive management.

These results compound over time. As storage fees decline and capacity increases, sellers can invest more in inventory of high-performing products, which further increases sales and profit margins.

For detailed guidance on how packaging and shipping affect your inventory costs, review our FBA shipping and packaging requirements guide. And if you're looking to understand how inventory costs fit into your overall business economics, our guide to calculating your Amazon true profit provides the complete framework.

Your IPI score doesn't have to be a constraint on growth. With the right strategies and disciplined execution, it can become a powerful tool for expanding your business while improving profitability. That's the approach we take with every client at Lab 916.