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This article applies to selling in: United States

FBA inventory storage limits

Note: Effective January 1, 2020, the IPI threshold for storage limits is 400 (previously 350).

To better manage fulfillment center storage space so that products are received and shipped to buyers more quickly, inventory storage limits can be applied. Storage limits are based on volume (measured in cubic feet) and are set for each storage type. Your current and potential storage limits and usage are shown on the Storage Monitor display, which you can view in your Inventory performance dashboard and Shipping Queue.

Storage limits criteria

Individual selling accounts have a set storage limit of 10 cubic feet; this value does not change. Individual selling accounts are not subject to storage limit increases.

Professional selling accounts may or may not have storage limits, depending on the following criteria:

  • Sellers who maintain an Inventory Performance Index (IPI) of 400 or greater will have unlimited storage for standard-size, oversize, apparel, and footwear items.
  • Sellers with an IPI score of less than 400 will be notified of their potential storage limits six weeks before the end of each quarter. If the IPI score remains less than 400 during the last full week of the quarter, these limits will apply to the next quarter.
  • New sellers that have been active for less than 26 weeks, or sellers without enough sales data to generate an IPI score during both of the two score check weeks will not receive storage limits.

Professional accounts that do have storage limits will still have a minimum of 25 cubic feet for standard, over-size, apparel, or footwear sort types.

Professional account holders can track your Inventory Performance Index in the Inventory Performance Dashboard and learn about IPI on the IPI Help page. The dashboard provides a hub for optimizing your FBA business, including customized recommendations to grow your sales and reduce costs. Your IPI score is updated weekly based on your ongoing inventory management.

Setting quarterly limits

Inventory storage limits are evaluated every three months for Professional accounts. If your IPI score is less than 400 six weeks before the end of the quarter, you will be sent an estimate of your possible storage limits for the following quarter. If your IPI score remains below 400 during the last full week of the quarter, inventory storage limits will apply for the next quarter.

Quarterly storage limits are calculated using several factors including:

  • Your sales volume (including your sales' seasonality periods)
  • Your historical IPI scores
  • Available fulfillment center capacity

Sellers with consistently higher IPI scores will receive higher storage limits, adjusted for sales volume and available capacity. When setting limits for an upcoming quarter, Amazon considers both your recent sales volume and seasonal volume from the last year.

Quarterly storage limits schedule

Storage limits are set by volume and adjusted quarterly. Storage limits will be determined based on your IPI during two score check weeks of the quarter – the sixth week before the end of the quarter and the last full week of the quarter. You can achieve unlimited storage if your Inventory Performance Index is 400 or above on either one of these score check weeks. The following table lists the score check weeks, as well as the effective quarter for the associated storage limits.

First score check

(sixth week before the quarter ends)

Final score check

(last full week of the quarter)

Storage limit effective period
Week 7 Week 13 April 1 – June 30
Week 20 Week 26 July 1 – September 30
Week 33 Week 39 October 1 – December 31
Week 46 Week 52 January 1 – March 31
Note: Week 1 begins during the first full week of January.

Storage types

Storage limits are applicable for six storage types: standard-size, oversize, apparel, footwear, flammable, and aerosol. You can see which storage types your products are categorized as and how much cubic feet they occupy using the FBA Inventory Age page and the Inventory Age report.

If you do not see a storage type in your Storage Monitor, it is because you have a limit of zero for that storage type.

Dangerous goods storage limit adjustments (flammable and aerosol) are handled separately from other storage types. See FBA dangerous goods (hazmat) program for more details.

Note: Amazon determines the storage type of your inventory based on the characteristics of the product. Storage type is not a category that can sellers can adjust. Products are not classified by more than one storage type.

Calculating cubic feet from inches

  1. Multiply length x width x height in inches to get the volume.
  2. Divide the volume by 1,728, which is 12 cubic inches.

Example: A unit measuring 47 x 12 x 10 inches divided by 1,728 = 3.3 cubic feet.

Note: Amazon may verify the weight and dimensions of a product using representative samples. Amazon’s information about a product’s weight and dimensions will be used to calculate fees if there is a difference between Amazon’s information and a seller’s information. Amazon may change its information about a product’s weight and dimensions from time to time to reflect updated measurements. Fees based on the weight and dimensions of a product are calculated using Amazon’s information about the weight and dimensions of that product at the time the fee is calculated.

Exceeding your FBA storage limit

Under the FBA inventory storage limits policy, you will not be able to create a new shipment to Amazon for a storage type until your inventory level drops below your limit for that storage type.

For example, if your current limit for standard-size inventory is 25 cubic feet and you have 26 cubic feet of standard-size inventory at an Amazon fulfillment center, you will not be able to create a new standard-size inventory shipment. However, if you are below your storage limit for oversize inventory, you will be able to create shipments of oversize inventory.

If you send more inventory than your storage limit allows, the extra inventory may be refused at the fulfillment center. For more information, see Shipping and routing requirements.

Storage overage fees will be charged if your existing inventory exceeds your storage limit for any sort type on any day within a given month. Please visit the Overage fee help page to learn more.

Reducing inventory

There are three ways to decrease the amount of inventory you have in an Amazon fulfillment center:

  • Sell more inventory. Manage Excess Inventory provides recommendations to increase sales.
  • Request to have inventory returned to you by creating a removal order.
  • Request to have inventory disposed of by creating a removal order.

For more information, see Remove inventory (overview).

Important: When you submit a removal order or make similar changes, the inventory Storage Monitor won't reflect the changes until your request has been processed, typically on the following day. Also, customer returns contribute to your overall inventory count.

Tracking ASIN limits

We may also create storage limits for specific ASINs. If an ASIN-specific limit is applied to your seller account, you can find the details in the downloadable Inventory Health report under the header asin-limit. This information is not available in the online Inventory Health report. See ASIN quantity limits for FBA.

Frequently asked questions

Can I purchase storage space?

At this time, Amazon does not offer the ability to purchase storage space.

Can I change the storage type of a product?

No. Storage types are determined by Amazon based on characteristics of a product.

You can check which storage type your products are categorized as and how much cubic feet they occupy on the FBA Inventory age page.

Can I trade space for one storage type with space in another storage type?

No. Inventory cannot be traded between storage types.

What happened to the hazmat storage type?

The storage type previously referred to as “hazmat” has been converted into two new storage types – aerosol and flammable. Storage limit adjustments for aerosol and flammable storage types are handled separately. See FBA dangerous goods (hazmat) program for more details.

What if I do not have an IPI score or am a new FBA seller?

Most sellers with Professional selling accounts have an IPI score, but some do not because we do not have enough data to generate a score for the account (for example, sellers who are new to FBA or have small quantities of FBA inventory).

After you first receive an IPI score, you will not be subject to storage limits for two full quarters.

For example, if you receive your first IPI score on week 3 (during Q1), you would have unlimited storage for all of Q2 and Q3, and then be subject to storage limits starting in Q4. As of Q3, you need to maintain a score above 400 six weeks before the end of Q3 or during the last full week of Q3 to keep unlimited storage during Q4.

You can view the date you received your first IPI score by clicking the Show details link under the IPI score color bar. This will reveal your Historical performance index and your First IPI score date will be visible above the graph.

Most sellers will receive their first IPI score approximately 15 weeks after their first product is received by FBA.

If you have an IPI score under 400 six weeks before the end of the current quarter, and you no longer have an IPI score the last week of the quarter, you will be subject to the specified storage limits for the next quarter. This does not apply if it's been less than two quarters since you've received your first IPI score.

Visit the Inventory performance dashboard and Get your inventory in shape for recommendations on managing your inventory.

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