Amazon FBA Storage Limits in 2026: Capacity Limits Explained

Quick answer: Amazon no longer uses the old account-level storage limits and unit-based restock limits. Since March 2023, every FBA seller works with a monthly FBA capacity limit, measured in cubic feet for each storage type. Your limit is based mainly on your sales history and forecast, your Inventory Performance Index (IPI) score, and available fulfillment center space. If you need more room, you can request extra capacity through Capacity Manager.

What Are Amazon FBA Inventory Storage Limits?

Amazon FBA inventory storage limits, now called FBA capacity limits, cap the total volume of inventory you can store in and send to Amazon fulfillment centers. Amazon uses them to keep warehouse space available for products that actually sell, which keeps delivery fast for customers.

Here is how capacity limits work today:

• Measured in cubic feet, not units: the size of your products matters as much as how many units you send.
• Set per storage type: standard-size, oversize, apparel, and footwear each have their own limit.
• Monthly, with estimates ahead: Seller Central shows your current limit plus estimated limits for upcoming months, so you can plan inbound shipments.
• Inbound inventory counts: units already in fulfillment centers plus open and in-transit shipments all count toward your limit.
• Applies to new sellers too: new accounts start with a baseline limit that adjusts as they build sales history.

Read More: How to Start an Amazon FBA Business?

How Much Inventory Can I Send to Amazon FBA in 2026?

There is no fixed number of units. You can keep sending inventory as long as your on-hand plus inbound volume stays within the capacity limit for that storage type. The old unit-based restock limits were retired when capacity limits launched in March 2023, so the cubic-feet figure in your Capacity monitor is the number that matters.

If you reach your limit, Seller Central can block new shipments for that storage type until inventory sells down, and inventory stored above your limit can trigger capacity overage fees. Before you buy a big batch of online arbitrage deals, check that you have room to ship them to Amazon FBA.

Standard-Size vs. Oversize Storage: Amazon Size Tiers

Because capacity is split by storage type, you need to know each product’s size tier. Small and large standard-size items use your standard-size capacity, while large bulky and extra-large items use oversize capacity. Apparel and footwear have their own storage types.

Here are Amazon’s current US product size tiers (the structure in place since 2024):

*Important:

For large standard-size, large bulky, and extra-large items up to 150 lb, Amazon charges on the greater of unit weight and dimensional weight (length × width × height ÷ 139). Small standard-size items use unit weight. Amazon adjusts tiers and fees from time to time, so confirm current numbers in Seller Central or in our Amazon FBA fees breakdown.

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How to Check Your FBA Capacity Limit (Max Inventory Level)

Your capacity limit is the modern version of the old maximum inventory level. To find it:

1. In Seller Central, go to Inventory > Inventory Planning, which opens the Inventory Performance dashboard (direct link, login required).
2. Open the Capacity monitor to see your capacity limit, current usage (on-hand plus inbound), and estimated limits for upcoming months for each storage type.
3. If you need more room, use Capacity Manager on the same page to request additional capacity.

How Can I Increase My Amazon Storage?

Limits apply per storage type. For example, if your standard-size limit is 100 cubic feet and you already have 100 cubic feet on hand and inbound, you cannot create a new standard-size shipment until some of it sells, even if you still have room for oversize items. These are the most effective ways to get more space:

• Request extra capacity in Capacity Manager: you submit a request with a reservation fee per cubic foot. If the inventory sells through, Amazon gives back performance credits that can offset some or all of that fee.
• Improve your IPI score: reduce excess inventory, raise your sell-through rate, fix stranded listings, and keep top sellers in stock.
• Clear slow movers: lower prices, run deals, or create removal and liquidation orders for aged inventory.
• Ship smaller and more often: keep backstock at a prep center or in Amazon Warehousing and Distribution (AWD), and replenish FBA as units sell.
• Buy only proven sellers: check sales rank and price history before you buy so new inventory does not sit and eat into your capacity.

Sending more than your limit allows can lead to shipment creation being blocked or extra units being refused, so check your capacity before every shipment.

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What Is A Good IPI Score on Amazon?

The Inventory Performance Index (IPI) is a score from 0 to 1,000 that shows how efficiently you manage your FBA inventory. Amazon has used 400 as its minimum IPI threshold for several years. Staying above it, and ideally well above it, supports healthier capacity limits and helps you avoid extra storage costs.

Amazon updates your IPI score weekly, and it is driven by four main factors:

• Excess inventory: units with more supply than demand.
• FBA sell-through rate: units sold compared with your average inventory.
• Stranded inventory: units in fulfillment centers without an active offer.
• In-stock rate: how well you keep replenishable best sellers available.

Keep in mind that IPI is only one input. A high score does not guarantee more space, because Amazon also weighs your sales forecast and network capacity. For a full walkthrough, read our Amazon IPI score guide.

Final Thoughts

Amazon’s capacity system rewards sellers who send inventory that sells. Check your Capacity monitor before every shipment, plan holiday stock early (see our guide on how to prepare for Amazon Q4), and keep your IPI healthy so you have room when the best deals appear.

Don’t forget that using an Online Arbitrage sourcing list is also efficient for succeeding in your FBA business and preventing non-successful inventory.

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