The Amazon Inventory Performance Index (IPI) measures how efficiently you manage FBA inventory. A score below 400 triggers storage limits. Here is how to fix it.
What the IPI measures
Your IPI reflects four metrics: excess inventory percentage, sell-through rate, stranded inventory, and in-stock rate for top sellers. Amazon updates it weekly.
7 steps to raise a low score
- Create removal orders for excess stock
- Run promotions to improve sell-through
- Fix stranded listings immediately
- Hold new shipments before quarterly evaluations
- Keep top sellers in stock
- Switch slow movers to FBM temporarily
- Set reorder alerts by days of supply
Full guide: https://amazonlistingaudit.com/blog/amazon-inventory-performance-index-guide-2026
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