Amazon FBA IPI score: Latest Rules Explained

In this article, you'll learn the latest Amazon FBAIPI score rules for 2026, including how the score is calculated, thresholds, common mistakes, and actionable steps to improve your score. Whether you're a seller or a buyer, understanding IPI is crucial for optimizing your Amazon experience.

Why Amazon FBA IPI Score Matters in 2026

Amazon FBA inventory performance index (IPI) is a metric Amazon uses to measure how efficiently you manage your FBA inventory. It directly impacts your storage limits for standard-size, oversize, and apparel items. In 2026, Amazon continues to enforce IPI thresholds to encourage healthy inventory turnover and reduce long-term storage costs. For sellers, a low IPI can result in storage capacity restrictions, limiting your ability to send new stock and potentially causing lost sales. For buyers, a seller with a high IPI is more likely to have items in stock and ship quickly, improving the overall purchasing experience.

Understanding IPI is not just about avoiding penalties; it's about optimizing your inventory strategy to maximize sales while minimizing storage fees. In this guide, we'll explain the latest rules, how IPI is calculated, common pitfalls, and practical steps to improve your score.

• IPI thresholds determine storage limits: as of 2026, the standard threshold is 400 (indicative, subject to official updates).
• IPI affects both sellers and buyers: sellers face storage restrictions, buyers may see out-of-stock items.
• A high IPI can lead to unlimited storage for certain categories, but this is not guaranteed.

Key Components of Amazon FBA IPI Score

Amazon calculates your IPI based on four key metrics: excess inventory, sell-through rate, stranded inventory, and in-stock rate. Each metric contributes to your overall score, which ranges from 0 to 1000. Excess inventory measures the percentage of inventory that has been in the warehouse for over 90 days. Sell-through rate is the number of units sold per unit stored over the last 90 days. Stranded inventory refers to items that have a listing issue and cannot be sold. In-stock rate measures how often you have inventory available for popular products.

In 2026, Amazon has refined the calculation to weigh sell-through rate more heavily, especially for seasonal items. For example, a seller with a sell-through rate above 200% (indicative) may see a significant boost in their IPI. Conversely, having more than 20% excess inventory (indicative) can lower your score. It's important to note that IPI is updated weekly, so you need to monitor your performance regularly.

• Excess inventory: items in the warehouse for over 90 days count against you.
• Sell-through rate: units sold per unit stored over 90 days.
• Stranded inventory: items with listing errors that prevent sales.
• In-stock rate: how often your popular items are available.

How to Evaluate Your IPI: Criteria and Trade-offs

To evaluate your IPI, you need to understand the thresholds. As of 2026, an IPI of 400 or above (indicative) is considered healthy and grants you unrestricted storage for most categories. Below 400, Amazon may impose storage limits, and in severe cases (below 350), you may face restrictions on creating new FBA shipments. However, these numbers are indicative and subject to change; always check the latest official guidelines.

When evaluating your IPI, consider trade-offs: maintaining a high sell-through rate might require aggressive pricing or promotions, which can reduce margins. Reducing excess inventory may involve disposing of or liquidating items at a loss. Similarly, increasing in-stock rate for fast-moving items might require more frequent replenishment, raising shipping costs. A balanced approach is key.

For buyers, evaluating a seller's IPI is not directly possible, but you can infer it from product availability, shipping speed, and whether out-of-stock notices appear frequently. Sellers with high IPI tend to have consistent stock levels and faster delivery times, which is beneficial for your purchasing experience.

• Thresholds: IPI >= 400 (indicative) for unrestricted storage; < 350 may trigger restrictions.
• Trade-offs: high sell-through may require discounts; reducing excess inventory may incur disposal costs.
• Buyers: look for sellers with consistent stock and fast shipping as indicators of good IPI.

Common Pitfalls When Managing IPI

One common pitfall is overstocking slow-moving items. Sellers often overestimate demand, leading to excess inventory that drags down IPI. Another is neglecting stranded inventory: if you have listings with errors, those items are not sellable, and Amazon may count them against you. Additionally, ignoring seasonal trends can cause you to miss the sell-through rate window, leading to a drop in IPI after the season.

Another pitfall is not using Amazon's tools effectively. Amazon provides a restock report and inventory performance dashboard, but many sellers fail to review these regularly. Also, some sellers try to game the system by creating fake orders or manipulating reviews, which can lead to suspension. Finally, for buyers, a common pitfall is assuming that a low price always indicates a good deal; it might be a sign of a seller trying to clear excess inventory, which could affect product quality or support.

• Overstocking slow movers: forecast demand accurately to avoid excess inventory.
• Ignoring stranded inventory: regularly check for listing errors and fix them promptly.
• Not using Amazon's tools: leverage restock reports and IPI dashboards.
• Gaming the system: avoid unethical practices that can lead to account suspension.
• For buyers: low prices may signal excess inventory, not necessarily good value.

Practical Recommendations and Next Steps

To improve your IPI, start by analyzing your inventory performance dashboard. Identify items with excess inventory and create a plan to sell through them, such as offering discounts or bundling. For stranded inventory, fix listing errors or remove them from FBA if necessary. Monitor your sell-through rate and adjust your inbound shipments to match demand more closely. Use Amazon's restock report to avoid out-of-stock on popular items.

Consider using a professional inventory management tool that integrates with Amazon to forecast demand and optimize stock levels. For buyers, the next step is to check the seller's ratings and feedback, as well as the product's availability history, to gauge their inventory management. If you are a cross-border e-commerce seller, also consider diversifying your sales channels to reduce reliance on FBA, but remember that IPI is specific to Amazon.

Finally, stay updated on Amazon's official announcements, as IPI rules can change. Set a monthly review of your IPI and adjust your strategy accordingly. Remember that these recommendations are based on current trends, and you should always verify with the latest official information.

• Analyze your dashboard monthly and act on data.
• Use discounts or bundles to move excess inventory.
• Fix stranded inventory immediately.
• Implement demand forecasting tools.
• For buyers: check seller feedback and availability history.
• Stay informed via Amazon's official communications.

Key Takeaways

Your Amazon FBA IPI score is a critical metric that impacts your storage limits and overall success on Amazon. By focusing on the four key components, avoiding common pitfalls, and following the practical recommendations, you can maintain a healthy IPI and ensure smooth operations. For buyers, a seller's IPI indirectly affects your shopping experience, so choose sellers with good inventory management. Next steps: review your inventory dashboard, implement improvements, and stay updated on official rule changes.

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.