IPI Risk Check: What Sellers Should Watch For

This article provides a concise overview of Amazon FBA's inventory performance index (IPI), why it matters in 2026, how it's calculated, evaluation criteria, common pitfalls, and actionable steps to improve your score. Whether you're a seller or a buyer, understanding IPI helps you make better decisions.

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

Amazon's inventory performance index (IPI) is a metric that measures how well you manage your FBA inventory. It directly affects your storage limits, restocking opportunities, and long-term storage fees. In 2026, Amazon continues to tighten storage capacity, making IPI a critical factor for sellers to maintain operational flexibility and control costs.

For buyers, understanding IPI helps you identify reliable sellers who maintain healthy stock levels and fulfill orders promptly. For sellers, a low IPI can lead to reduced storage capacity, additional fees, and even suspension of FBA privileges. This guide explains what IPI is, how it's evaluated, and what you can do to improve it.

• IPI thresholds: Amazon typically sets a minimum IPI (often 400) to avoid storage restrictions.
• Storage types affected: IPI impacts standard-size, oversize, apparel, and footwear storage limits.
• Fee implications: High IPI can reduce or eliminate overage fees and long-term storage charges.

Key Components of IPI: What Amazon Measures

Amazon calculates IPI based on four main factors, each weighted and updated weekly. Understanding these components helps you target improvements effectively.

The four factors are: excess inventory percentage, sell-through rate, stranded inventory percentage, and in-stock rate. Each reflects a different aspect of inventory health.

• Excess inventory: The proportion of inventory that has enough units to cover more than 90 days of demand. High excess inventory lowers IPI.
• Sell-through rate: The number of units sold and shipped divided by average units in stock over the last 90 days. A higher sell-through rate improves IPI.
• Stranded inventory: Inventory that has a listing issue (e.g., no active offer) and cannot be sold. Reducing stranded inventory raises IPI.
• In-stock rate: The percentage of time your popular products are in stock. Maintaining high in-stock rates for top sellers boosts IPI.

How to Evaluate Your IPI: Criteria and Trade-offs

To assess your IPI, log into Seller Central and check the Inventory Performance dashboard. The score ranges from 0 to 1000, with higher being better. Amazon typically sets a threshold (often 400) below which you face storage restrictions. Aim for 450-500 to have a buffer.

When evaluating improvement strategies, consider trade-offs. For example, increasing sell-through rate might require more aggressive promotions, which can reduce profit margins. Reducing excess inventory may involve discounting or disposing of stock, incurring costs. Each action affects your IPI differently, so prioritize based on your cash flow and long-term goals.

• Regular monitoring: Check your IPI weekly; it updates every Monday.
• Action plan: If your IPI is below threshold, create a plan to address the worst-performing factor first.
• Seasonal adjustments: For seasonal products, plan inventory to avoid excess after peak season.

Common Pitfalls When Managing IPI

Many sellers make avoidable mistakes when trying to improve IPI. One common pitfall is overreacting to short-term fluctuations, leading to unnecessary write-offs or stock-outs. Another is ignoring stranded inventory because it seems minor, but it can significantly drag your score.

Additionally, some sellers focus solely on sell-through rate and neglect in-stock rate for bestsellers, causing lost sales and lower IPI. Also, failing to account for lead times can result in stockouts or overstocking, both of which hurt IPI.

• Overcorrecting: Cutting inventory too aggressively can lead to stockouts and lost sales, hurting in-stock rate.
• Neglecting stranded inventory: Regularly check the 'Fix stranded inventory' report.
• Ignoring seasonal trends: Overstocking for holidays can cause excess inventory after the season.
• Not using removal orders: When necessary, create removal orders to dispose of excess inventory, but factor in removal fees.

Practical Recommendations and Next Steps

To improve your IPI, start by reviewing your inventory reports. Identify items with excess inventory and create a plan to sell through them, such as running promotions or bundling. For stranded inventory, fix listing issues promptly. For slow movers, consider lowering prices or creating removal orders.

Also, improve your demand forecasting. Use historical sales data and market trends to order the right quantities. Maintain a safety stock for bestsellers to ensure high in-stock rates. Finally, monitor your IPI regularly and adjust your strategy as Amazon's policies evolve.

• Audit your inventory: Use the Inventory Performance dashboard to see which factors are dragging your score.
• Set a target: Aim for an IPI of 450 or higher to have a safe buffer.
• Create a calendar: Plan inventory replenishment around seasonal peaks and supplier lead times.
• Utilize FBA tools: Use Amazon's restock reports and fee previews to make informed decisions.
• Stay updated: Amazon may change IPI thresholds or calculation methods; check Seller Central news.

Key Takeaways

In summary, IPI is a vital metric for Amazon FBA sellers, affecting storage limits and fees. By understanding its components and avoiding common mistakes, you can maintain a healthy score and ensure smooth operations. Start by auditing your inventory, setting a target score, and implementing a regular monitoring routine. For buyers, IPI is a signal of seller reliability, so consider it when choosing whom to buy from. Always refer to official Amazon policy updates for the most current thresholds and fees.

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.