Amazon FBA IPI: Your Top Questions Answered

This article answers your top questions about the Amazon FBA Inventory Performance Index (IPI) in 2026. You will learn why IPI matters for your business, how to evaluate your score, common pitfalls to avoid, and actionable recommendations to maintain or improve your IPI. Whether you are a new or experienced seller, this guide provides clear, specific insights to help you manage inventory effectively and avoid storage limitations.

Why Amazon FBA Inventory Performance Index (IPI) Matters in 2026

The Amazon FBA Inventory Performance Index (IPI) is a metric Amazon uses to measure how well you manage your FBA inventory. It directly affects your storage limits, which in turn influence your ability to list products, plan promotions, and generate sales. In 2026, Amazon continues to prioritize efficient inventory management to optimize warehouse space and reduce operational costs. A low IPI score can lead to storage restrictions, limiting the quantity of products you can send to FBA, and potentially costing you sales and ranking.

For cross-border e-commerce sellers, especially those shipping from China to the US or Europe, maintaining a healthy IPI is critical. It ensures you have enough inventory to meet demand without incurring high storage fees or risking long-term storage surcharges. A high IPI also gives you more flexibility to experiment with new products and seasonal promotions, as you are less likely to face capacity constraints. Understanding IPI is not optional; it is a fundamental part of successful FBA operations.

In this guide, we will break down the components of IPI, how to interpret your score, and what practical steps you can take to keep your IPI in a safe range. We will also highlight common mistakes that drag down your IPI and how to avoid them. By the end, you will have a clear action plan to improve your inventory performance.

Key Components of Your Amazon FBA IPI Score

Your IPI score is calculated based on four main factors: excess inventory, sell-through rate, stranded inventory, and in-stock rate. Each factor contributes to your overall score, and understanding them is essential for improvement.

Excess inventory measures the amount of inventory you have that is not selling at a healthy rate. Amazon considers items that have been in stock for over 90 days, or that have a high number of units compared to sales velocity, as excess. To improve this, you need to reduce stock levels for slow-moving products, either through promotions, removal orders, or better forecasting.

Sell-through rate is the number of units sold compared to the number of units in stock over a given period. A higher sell-through rate indicates that your inventory is moving efficiently. Amazon tracks this over the last 90 days. To boost your sell-through, focus on products with proven demand and avoid overstocking.

Stranded inventory refers to products that are in FBA but have no active listing, often due to listing errors, missing product information, or accidental deletion. Stranded inventory hurts your IPI because it represents unsellable stock. Regularly check your inventory dashboard for stranded items and fix listing issues promptly.

In-stock rate measures how often your popular products are available for purchase. If you frequently run out of stock, your IPI suffers. Maintaining a consistent supply of high-demand items is crucial. This might involve setting up restock alerts and using tools like Amazon's restock recommendations.

• Excess inventory: keep stock levels aligned with sales velocity.
• Sell-through rate: monitor units sold vs. units on hand over 90 days.
• Stranded inventory: ensure all FBA units have active, buyable listings.
• In-stock rate: avoid stockouts for bestsellers.

How to Evaluate Your Amazon FBA IPI: Criteria and Trade-offs

Amazon assigns an IPI score between 0 and 1000, with the threshold for unrestricted storage typically set at 400 or 450, depending on the season and category. As of 2026, the standard threshold is 400, but it can be adjusted by Amazon. A score above 400 usually means you have no storage limits, while below 400 may result in capacity constraints. To evaluate your IPI, log into Seller Central and navigate to the Inventory Performance dashboard. There you will see your current score and a breakdown of the four factors.

When evaluating your score, consider the trade-offs. For example, maintaining a high in-stock rate might require you to hold more inventory, which could increase excess inventory and lower your sell-through rate. Conversely, reducing excess inventory aggressively might lead to stockouts and hurt your in-stock rate. The key is to find a balance that keeps all factors within acceptable ranges.

Typical benchmarks: a sell-through rate of around 4-5 (i.e., you sell 4-5 units per 100 units in stock per month) is considered healthy. Excess inventory should be less than 10% of your total inventory. Stranded inventory should be close to zero. In-stock rate should be above 90% for your top-selling ASINs. These numbers are indicative and depend on your product category; always refer to Amazon's official guidance for the latest thresholds.

Another trade-off involves seasonal products. If you sell seasonal items, you might have high excess inventory during off-peak periods, which can lower your IPI. In such cases, you might accept a temporary dip in IPI to prepare for peak season, but you must plan to clear excess inventory before the next IPI evaluation.

• Check your IPI score and the four factor breakdown regularly.
• Aim for sell-through rate above 4, excess inventory below 10%, stranded inventory near zero, and in-stock rate above 90% for key products.
• Balance in-stock rate vs. excess inventory: avoid overstocking to prevent stockouts, but don't accumulate dead stock.
• Seasonal products may cause temporary IPI dips; plan for clearance strategies.

Common Pitfalls When Dealing with Amazon FBA IPI

Many sellers make avoidable mistakes that unnecessarily lower their IPI. One common pitfall is ignoring stranded inventory. When a listing is suppressed or removed, the units sitting in FBA become stranded, hurting your score. To prevent this, regularly audit your listings for errors, ensure all required attributes are filled, and promptly create or relist products if they become inactive.

Another pitfall is overstocking based on optimistic sales forecasts. Sellers often order large quantities to save on unit cost or avoid stockouts, but if demand does not meet expectations, excess inventory accumulates. This not only lowers your IPI but also incurs additional monthly storage fees and potential long-term storage surcharges. Use historical sales data and demand forecasting tools to order more accurately.

Some sellers neglect to remove or dispose of unsellable inventory. If you have items that are damaged, expired, or have been in storage for over 365 days, they count as excess and incur high fees. Amazon offers removal or disposal options, but they cost money. However, the cost of removal is often less than the storage fees and IPI damage. Evaluate the cost-benefit of removing old inventory.

Finally, a lack of attention to restocking popular items leads to stockouts, which hurt your in-stock rate. While you might be cautious about overstocking, you also need to ensure you have enough inventory to meet demand. Set up automatic alerts for low stock and use Amazon's restock recommendations as a starting point, but adjust based on your own sales velocity and lead times.

• Ignoring stranded inventory: fix listing issues quickly.
• Overstocking without accurate forecasts: order based on data, not guesswork.
• Neglecting removal of dead stock: compare removal costs vs. storage fees.
• Understocking bestsellers: monitor stock levels and reorder in time.

Practical Recommendations and Next Steps

To improve or maintain your IPI, start by setting a regular review schedule. Check your IPI dashboard at least weekly to monitor trends. Use the following action plan to address each factor.

For excess inventory, identify products with excess units and take action. Options include running promotions, creating lightning deals, or using Amazon's Outlet deals. If the product is slow-moving, consider a removal order to free up storage space and reduce fees. Remember, the goal is to reduce excess inventory to below the 10% threshold.

To improve sell-through rate, focus on optimizing your product listings. Enhance your title, images, and bullet points to increase conversion. Consider adjusting your price to stay competitive. Also, use Sponsored Products to boost visibility for slow-moving items, but monitor your advertising costs to ensure profitability.

For stranded inventory, immediately resolve any listing issues. Use the 'Fix stranded inventory' report to identify affected ASINs and take corrective action. If a listing is intentionally removed, create a new listing or delete the inventory to avoid it being stranded.

To maintain a high in-stock rate, plan your inventory replenishment carefully. Factor in your supplier's lead time, shipping time, and sales velocity. Use FBA's restock recommendations, but adjust for your own data. Set reorder points to trigger restocking before stockouts occur. For seasonal items, build up inventory well in advance of the peak season, but have a clear plan to reduce stock after the season ends.

Finally, consider using third-party tools for inventory forecasting and analytics. These tools can provide more detailed insights and help you automate some decisions. However, always validate their recommendations with your own understanding of your business.

• Set a weekly reminder to review your IPI dashboard.
• Create a plan to reduce excess inventory via promotions or removals.
• Optimize listings and pricing to improve sell-through rate.
• Actively fix any stranded inventory issues.
• Use restock alerts and supplier lead times to avoid stockouts.
• Consider third-party analytics tools for advanced forecasting.

Key Takeaways

Your Amazon FBA Inventory Performance Index (IPI) is a critical metric that affects your storage limits and overall FBA success. In this guide, we covered why IPI matters, the four key components, how to evaluate your score with specific benchmarks, common pitfalls to avoid, and practical steps to improve. To move forward, start by checking your current IPI and the breakdown of factors. Then, implement at least one action from each category: reduce excess inventory, improve sell-through, fix stranded inventory, and maintain in-stock rates. Regularly review your progress and adjust your strategy as needed. By taking these steps, you can keep your IPI above the threshold and enjoy unrestricted storage, allowing you to grow your cross-border e-commerce business smoothly.

This article is compiled by kuajing168.cn for reference only. Please refer to the official announcements of each platform for the latest policies and rates.