Amazon IPI Score
The Inventory Performance Index decides how much FBA storage Amazon will give you. It is built from excess inventory, stranded inventory, sell-through rate and in-stock rate, and it is measured on a rolling basis rather than on the day you look at it. Below is what each score range means in practice and what to do at each threshold, plus the mechanics behind the four inputs.
By score range
What Amazon does at your current number.
IPI Score Under 300: Critical Actions to Take Immediately
An IPI score below 300 means Amazon will impose severe storage limits on your FBA inventory. Here is what to do right now.
IPI Score 300-349: Serious Storage Restriction Territory
An IPI score between 300-349 means significant FBA storage limits are in effect. Steps to recover your score quickly.
IPI Score 350-399: Below Target: Improvement Plan
A 350-399 IPI score puts you in the storage restriction zone on some Amazon marketplaces. Here is how to push it above 400.
IPI Score 400-449: Approaching the Safe Zone
At 400-449, you are close to Amazon's comfortable threshold. Small improvements move you into unrestricted territory.
IPI Score 450-499: Stable but Room to Grow
An IPI score of 450-499 means your FBA account is in reasonable health. Here is how to push it toward 500+ for buffer.
IPI Score 500-549: Good Performance
An IPI score of 500-549 shows healthy FBA inventory management. How to maintain this range and push toward 550+.
IPI Score 550-599: Strong Performance
A 550-599 IPI score is well above Amazon's thresholds. What puts top sellers in this range and what drives them higher.
IPI Score 600-649: Excellent FBA Health
An IPI score of 600-649 puts you in the top tier of FBA sellers. The habits and systems that get you here.
IPI Score 650-699: Top-Tier Inventory Management
A 650-699 IPI score is in the top percentile of FBA sellers. The advanced practices that sustain this level.
IPI Score 700+: Elite FBA Performance
An IPI score above 700 means your FBA inventory operation is running at elite levels. What separates these sellers from the rest.
How the score works
The inputs, the timing, and the levers that move them.
What Is Amazon IPI Score? A Complete Explanation
The Amazon Inventory Performance Index (IPI) score explained: what it measures, why it matters, and how it is calculated.
How to Improve Your Amazon IPI Score: 8 Proven Methods
Eight specific actions that improve your Amazon IPI score, ranked by impact and speed of result.
Amazon IPI Penalties: Storage Limits and How They Work
What happens when your IPI score falls below Amazon's threshold, including storage limits, fees, and how to recover.
IPI Score vs. Sell-Through Rate: How They Relate
How sell-through rate affects your IPI score and what a good sell-through rate looks like for FBA sellers.
Amazon IPI Dashboard Guide: How to Read and Use It
A walkthrough of the Amazon Inventory Performance Index dashboard in Seller Central, where to find it and how to interpret each metric.
IPI Score Best Practices for FBA Sellers
The operational habits and systems that consistently high-IPI sellers use to maintain scores above 500.
Amazon FBA Storage Limits and IPI Score: Complete Guide
How Amazon determines FBA storage limits based on IPI score, including current thresholds and how to maximize your allocation.
Q4 FBA Strategy: Managing IPI Score During Peak Season
How to manage your Amazon IPI score heading into Q4 without missing out on peak season sales.
Amazon Restock Limits vs. Storage Limits: What Changed
How Amazon transitioned from restock limits to storage limits and what the current system means for FBA sellers.
History of Amazon IPI Score: How It Has Evolved
How Amazon's Inventory Performance Index has changed since its introduction and what the current system looks like.
Amazon IPI Score Formula: How It Is Calculated
The exact factors Amazon uses to calculate your IPI score and the weight each factor carries.
Excess Inventory and IPI Score: Complete Breakdown
How excess inventory is defined by Amazon, how it affects your IPI, and the most effective ways to reduce it.
Sell-Through Rate and IPI: How to Improve It
Sell-through rate is a key IPI driver. How Amazon calculates it, what a good rate looks like, and how to improve yours.
Stranded Inventory and IPI: How to Keep It at Zero
How stranded FBA inventory affects your IPI score and a systematic approach to keeping your stranded count at zero.
In-Stock Rate and IPI: How to Maintain High Availability
How in-stock rate contributes to your IPI score and practical strategies to avoid stockouts on high-velocity products.
Stranded inventory is usually a listing problem
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What is a good Amazon IPI score?
Above 500 keeps you clear of storage limits with room to spare. Between 400 and 500 is workable but leaves no margin before a restriction. Below 400 is where Amazon starts capping FBA storage, and below 300 the caps get severe enough to affect what you can restock.
How often does the IPI score update?
Weekly, with the number that matters measured at the end of each quarter. That timing is the part sellers miss: fixing excess inventory in the last week of a quarter rarely moves the score enough, because the underlying metrics are rolling averages over the preceding weeks.
What actually raises an IPI score?
Four things: clearing excess inventory, fixing stranded inventory, keeping sell-through up, and holding in-stock rate on your best sellers. Stranded inventory is the fastest of the four because it is usually a listing problem rather than a demand problem, and it can be fixed the same day.
Does a low IPI score affect my ranking?
Not directly. It affects storage limits, which affect how much you can keep in stock, which affects sales velocity and therefore rank. The damage is real but it arrives one step removed, which is why low IPI often shows up as a slow decline rather than a sudden drop.