How to Avoid Doubled FBA Storage Fees for Inventory Over 180 Days in 2026

Key Takeaway

⚠️ Efficient inventory management is crucial, as FBA inventory exceeding 180 days faces increased Long-Term Storage Fee (LTSF) risks. In 2026, LTSF for specific inventory age tiers has doubled, making proactive management a must.

Why This Matters Now

Amazon consistently strengthens its policies to improve the efficiency of its Fulfillment Center space. Specifically, in 2026, Amazon adjusted the FBA fee structure in several ways, significantly increasing Long-Term Storage Fees (LTSF). Effective January 15, 2026, the minimum LTSF for items stored for 12-15 months doubled from $0.15 to $0.30 per unit per month, and a new fee tier was introduced for inventory aged 15 months or more. Failing to acknowledge these changes and manage your inventory accordingly can lead to unexpected, substantial costs, directly impacting your profitability as a seller. Now is the time to review and optimize your inventory management strategy.

Key Rules to Remember

180-Day Threshold: FBA inventory stored for 180 days or more is categorized as 'Aged Inventory,' increasing the risk of Long-Term Storage Fees. It also begins to negatively impact your Inventory Performance Index (IPI) score. Actual LTSF charges apply to inventory stored for 12 months or longer. 2026 LTSF Increase: Starting in 2026, the minimum Long-Term Storage Fee for inventory stored for 12-15 months has doubled to $0.30/unit per month. For inventory aged 15 months or more, the fee will be the greater of $0.35/unit per month or $7.90 per cubic foot. The Importance of IPI Score Management: Your IPI score is a metric that measures how efficiently you manage your FBA inventory, and it directly impacts your FBA Storage Limits. Maintaining an IPI score of 400 or higher remains crucial in 2026, as Amazon is applying IPI policies even more strictly. Monthly Storage Fees: Beyond Long-Term Storage Fees, don't overlook the Monthly Storage Fee charged every month. During the peak Q4 (October-December) season, storage fees for standard-size products can increase up to $2.40 per cubic foot, so be mindful.

Consequences of Non-Compliance

⚠️ Massive Storage Fees: The increased Long-Term Storage Fees and Monthly Storage Fees in 2026 will lead to unexpected costs, shrinking your product's Profit Margin and severely eroding your profitability. Restricted FBA Storage Limits: A low IPI score will restrict your FBA Storage Limits, making it difficult to send in new products and replenish popular items, ultimately leading to lost sales opportunities. Increased Inventory Disposal Costs: If you need to dispose of or remove slow-moving inventory, fees will be charged per-unit starting February 15, 2026. While this offers greater visibility into processing costs, the financial burden still exists.

Actionable Checklist

1. Regularly Check Inventory Age Reports: In Seller Central, navigate to Reports → Fulfillment → Inventory Age to immediately identify inventory aged 180 days or more, and then create a plan to promote sales or dispose of it. 2. Monitor and Improve Your IPI Dashboard: Continuously check your IPI score under Inventory → Inventory Performance and actively follow Amazon's inventory management recommendations. It's crucial to reduce excess inventory and increase your Sell-through Rate. 3. Sales Promotion and Inventory Disposal Planning: Quickly sell off aged inventory through promotions, advertising, or price adjustments, or if sales are difficult, prevent additional fees by creating a Removal Order or Disposal Order. You might also consider utilizing Amazon Warehousing & Distribution (AWD) to bypass FBA capacity limits and store additional inventory.

Common Mistakes to Avoid

1. Ignoring Inventory Age and IPI Score: Many sellers simply let inventory accumulate in FBA warehouses without regularly checking inventory age or IPI scores, only to later face massive fees or storage limit restrictions. Remember, inventory management is a critical component of FBA selling. 2. Overstocking Due to Inaccurate Sales Forecasting: Without accurate sales forecasting, sellers often send in excessive inventory, leading to fees from Excess Inventory, or conversely, miss sales opportunities due to insufficient stock. Amazon recommends maintaining approximately two months' worth of inventory in FBA warehouses.