Amazon Restock Limits Explained – How to Navigate Inventory Caps

Navigating Amazon’s restock limits has become one of the biggest operational challenges for FBA (Fulfillment by Amazon) sellers in recent years. With fluctuating inventory restrictions, sellers need to be more strategic than ever to maintain sales velocity without getting penalized. 

This guide will break down what Amazon restock limits are, how they work in 2025, and what you can do to stay ahead. 

What Are Amazon Restock Limits? 
Amazon restock limits are caps placed on how much inventory sellers can send to FBA warehouses. These limits are determined at the account level and by storage type (standard-size, oversize, apparel, footwear, etc.). 

Amazon introduced these constraints to optimize warehouse space and improve fulfillment efficiency, especially during peak periods like Q4 or Prime Day. 

Restock Limits vs Storage Limits 
It’s essential to distinguish between two different concepts: 

• Restock limits: These govern how many units you can send to Amazon fulfillment centers. 
• Storage limits: These determine how much space (in cubic feet) your current inventory can occupy in FBA warehouses. 

You can hit your restock limit even if you’re within your storage capacity, so tracking both is crucial. 

How Are Restock Limits Calculated in 2025? 
As of 2025, Amazon calculates restock limits using a variety of performance metrics: 

• IPI score (Inventory Performance Index) 
• Sell-through rate 
• Storage utilization 
• Inbound performance and delays 

Accounts with strong sell-through and healthy IPI scores are rewarded with higher restock limits, while those with slow-moving inventory get penalized. 

How to Check Your Restock Limit 
To find your restock limits: 

1. Log into your Seller Central account. 
2. Go to Inventory → Inventory Planning. 
3. Click on the Restock Limits tab. 

There, you'll see a breakdown by storage type, your usage, and your maximum limits. 

Top Challenges with Amazon Restock Limits 

1. Best-sellers get throttled 
   High-volume sellers often face the irony of being unable to replenish fast-selling products in time. 
2. New product launches are constrained
   New listings have no historical performance, so limits are minimal — making launches riskier. 
3. No clear notice of change
   Amazon may update restock limits weekly without prior notice. 

Tips to Manage and Improve Your Restock Limits 

1. Optimize Sell-Through Rate 
Improve the ratio of units sold vs. units in storage. Strategies include: 

• Running time-sensitive promotions 
• Improving listing quality 
• Adjusting pricing dynamically 

2. Remove Excess Inventory 
Use Amazon’s automated removal recommendations, or manually create removal orders for dead stock. 

3. Diversify Fulfillment – Consider FBM 
Don’t rely entirely on FBA. Set up FBM listings for popular SKUs so you can continue selling even when restock limits hit. 

4. Use 3PLs (Third-Party Logistics Providers) 
Work with a 3PL to stage inventory closer to fulfillment centers and drip-feed stock as space opens. 

5. Track Your IPI Score Weekly 
An IPI score of 400+ is generally safe, but Amazon prefers sellers to aim for 450 or above. Use it as a diagnostic tool to detect what’s impacting your limits. 

How SentryKit Helps You Stay on Top of Inventory Limits 

SentryKit’s AI-powered product monitoring can alert you when: 

• Your restock limits change suddenly 
• Your inventory health metrics decline 
• A best-seller starts to run low 

This gives you a real-time edge, allowing proactive decisions to avoid stockouts or penalties. 

Final Thoughts 
Amazon restock limits aren't going away — in fact, they're likely to become more dynamic. For sellers, this means that success in 2025 depends not just on finding winning products, but also on mastering your logistics. 

By using data, diversifying fulfillment, and tracking performance closely, you can thrive within Amazon’s constraints.