Amazon IPI Score: How to Budget and Save

This guide explains the Amazon FBA inventory performance index (IPI) in 2026, how it affects your storage costs and sales, and provides practical steps to evaluate, budget, and save. You'll learn the key components, common pitfalls, and actionable strategies to maintain a healthy score.

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 inventory over time. It directly impacts your storage limits and fees. In 2026, with tighter warehouse capacity and higher fulfillment costs, maintaining a healthy IPI is critical for both sellers and buyers who rely on Prime delivery.

For sellers, a low IPI (below 400) results in storage limits and potential overage fees, which can eat into margins. For buyers, a well-managed IPI means faster shipping and fewer out-of-stock items. This guide will help you understand the IPI, evaluate your performance, and implement budget-friendly strategies to keep your score healthy.

Key Components of the Amazon FBA Inventory Performance Index (IPI)

Amazon calculates IPI based on four main factors: excess inventory, sell-through rate, stranded inventory, and in-stock rate. Each component contributes to your overall score, which ranges from 0 to 1000, with 400 being the typical threshold for unlimited storage.

Excess inventory refers to items that have over 90 days of supply. Sell-through rate measures how quickly you sell inventory relative to what you have on hand. Stranded inventory is stock that is listed but not buyable due to listing issues. In-stock rate tracks how often you have units available for sale. Understanding these components helps you identify which areas to improve.

Typical scores: above 500 is considered strong, 400-500 is acceptable, and below 400 triggers storage restrictions. Note that these thresholds are indicative and subject to change based on Amazon's official policy updates.

• Excess inventory: aim for less than 90 days of supply
• Sell-through rate: higher is better, typically above 80%
• Stranded inventory: keep it near zero
• In-stock rate: maintain high availability for popular items

How to Evaluate Your IPI: Criteria and Trade-offs

To evaluate your IPI, log into Seller Central and navigate to the Inventory Performance dashboard. Check your score and the breakdown of each factor. Look for red flags: high excess inventory, low sell-through, or any stranded listings.

Trade-offs: reducing excess inventory may require discounting or removal, which costs money. Increasing sell-through might mean ordering less, risking stockouts. Balancing these is key. For example, you might accept a lower in-stock rate on slow movers to avoid excess fees.

Set a target: if your score is below 400, focus on quick wins like removing stranded inventory and creating removal orders for excess. If your score is above 500, maintain your strategy but monitor trends monthly. Use Amazon's recommended actions in the dashboard as a starting point.

• Check IPI dashboard monthly
• Review excess inventory report for items over 90 days
• Analyze sell-through rate per SKU
• Fix stranded inventory within 48 hours
• Balance in-stock rate with storage costs

Common Pitfalls When Managing Your IPI

One common pitfall is ignoring the IPI until you hit a storage limit. By then, you may face overage fees or forced removals, which are costly. Another pitfall is overcorrecting by slashing inventory too aggressively, leading to stockouts and lost sales.

Pitfall: relying on sales forecasts that are too optimistic. This leads to excess inventory. Pitfall: not updating listings regularly, causing stranded inventory. Pitfall: forgetting to account for seasonal fluctuations, which can distort your sell-through rate.

To avoid these, set regular review cycles, use historical data for forecasting, and maintain a buffer for unexpected demand. Also, note that IPI is calculated weekly but updated monthly, so don't panic over short-term drops.

• Don't ignore IPI until it's too late
• Avoid overcorrecting and causing stockouts
• Use realistic sales forecasts
• Keep listings updated to prevent stranded inventory
• Account for seasonality in your inventory plan

Practical Recommendations and Next Steps

To budget and save, start by auditing your current inventory. Identify slow-moving items and create a removal or discount plan. Use Amazon's Fee Preview tool to estimate storage costs and compare them with potential revenue.

Next, implement a replenishment strategy: order smaller, more frequent shipments to maintain a steady sell-through rate. Consider using FBA Inventory Placement to optimize warehouse distribution, which can reduce shipping costs.

Finally, set a monthly IPI review. Track your score and adjust strategies based on performance. If you need help, consider using third-party inventory management tools that integrate with Amazon. Remember, all fees and policies are indicative and subject to change; always check the latest official Amazon updates.

• Audit inventory and identify slow movers
• Use Fee Preview to estimate costs
• Adopt smaller, frequent shipments
• Consider FBA Inventory Placement service
• Set monthly IPI review and adjust

Key Takeaways

In summary, the Amazon IPI score is a crucial metric for FBA sellers. By understanding its components, evaluating your performance, and avoiding common mistakes, you can budget effectively and save on storage fees. Next steps: check your IPI today, implement the recommendations, and review monthly. Stay updated with Amazon's official policies for any 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.