To better manage fulfillment center storage space so that products are received and delivered to buyers more quickly, we may apply inventory storage limits. 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 appears in several places in your seller account, including your Inventory performance dashboard and Shipping Queue.
Individual selling accounts have a set storage limit, which does not increase or decrease.
Professional selling accounts may or may not have storage limits, depending on the following criteria:
You can check your IPI score on the Inventory performance dashboard, where we also provide you with four ways you can improve your performance.
For sellers with a Professional selling account, storage limits are evaluated every three months. If your IPI score is less than 350 six weeks before the end of the quarter, you will be notified of your potential storage limits. If your IPI score is still less than 350 during the last full week of the quarter, those limits will apply for the next quarter.
Quarterly storage limits are based on:
Sellers with consistently higher 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.
Storage limits are determined based on your Inventory Performance Index score during two weeks of the quarter: the sixth week before the end of the quarter and the last full week of the quarter. The following table lists these dates, as well as the effective dates 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|
For sellers with Professional selling accounts, storage limits will not be set lower than 25 cubic feet for each storage type.
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.
Example: A unit measuring 47 x 12 x 10 inches divided by 1,728 = 3.3 cubic feet.
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.
If your existing inventory exceeds your storage limits for a given month, you will be charged an inventory storage overage fee in addition to monthly inventory storage fees and, if applicable, long-term storage fees. The overage fee is based on how many days your storage limits are exceeded. This charge will occur even if your inventory was reduced back below your storage limits allocated for that month. It will be charged monthly at $10 per cubic foot based on the daily average volume (measured in cubic feet) for any space your inventory occupies in Amazon fulfillment centers beyond your storage limits.
The volume measurement is based on unit size when properly packaged and ready to ship in accordance with FBA policies and requirements. Amazon reserves the right to measure or weigh packaged units or representative samples and to determine the storage type. In the event of any conflict between an Amazon measurement and information provided by the seller, Amazon's measurement will govern.
The following example illustrates how the overage fee will be assessed and charged:
|Event (with dates)||Sample values|
|Notification sent six weeks before end of quarter (week 20)|
|The seller’s Inventory Performance Index is less than 350 for this week, so a notification is sent indicating what their storage limit will be on July 1 if their score does not improve to at least 350 by week 26.||Inventory Performance Index||300|
|Current standard-size storage limit||1,200 cubic feet|
|Potential standard-size storage limit||1,000 cubic feet|
|Quarter-end Inventory Performance Index (week 26)|
|The seller’s Inventory Performance Index is still less than 350 on week 26 so their storage limit will be adjusted on July 1.||Inventory Performance Index||280|
|Original standard-size storage limit||1,200 cubic feet|
|New standard-size storage limit||1,000 cubic feet|
|Inventory Storage Overage Fee accrues (July 1)|
|The seller’s inventory currently exceeds their standard-size storage limit by 100 cubic feet, so they will incur an overage fee of $10 per cubic foot, or $1,000 total if no action is taken (to be assessed and charged in August).||Standard-size storage limit||1,000 cubic feet|
|Space taken by existing standard-size inventory||1,100 cubic feet|
|Current standard-size overage||100 cubic feet|
|Potential overage fee:||$1,000|
|Seller reduces inventory exceeding limit (July 5)|
|The seller creates a removal order for 80 cubic feet of standard-size inventory on the July 5. No other standard-size inventory is sold or removed during July.||Standard-size overage, July 1 – 4||100 cubic feet|
|Standard-size removal, July 5||80 cubic feet|
|Standard-size overage, July 5 – 31||20 cubic feet|
|Inventory Storage Overage Fee billed (August 5)|
|The seller’s average overage for the month was 30.322 cubic feet. They will be charged $10 per cubic foot for a July total of $303.22.||July average standard-size overage||30.322|
|Storage Overage Fee per cubic foot||$10.00|
|Total July Storage Overage Fee||$303.22|
In the example above, if the seller does not remove or sell through their inventory that exceeds the standard-size limit by August 1, they will begin accruing Inventory Storage Overage Fees for August.
There are three ways to decrease the amount of inventory you have in an Amazon fulfillment center:
For more information, see Remove inventory (overview).
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.
You will be informed what your potential storage limits will be six weeks before the end of the current quarter. Those limits will go into effect only if your IPI score is also less than 350 during the last full week of the quarter.
You will have storage limits only if your IPI score is less than 350 six weeks before the end of the current quarter and during the last week of the current quarter. In this example, you would not have storage limits because your score was more than 350 six weeks before the quarter ended.
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. You would need to maintain a score above 350 six weeks before the end of Q3 and the last full week of Q3 in order to keep unlimited storage in 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 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 350 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.
No, storage types are determined by Amazon based on characteristics of the 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.
No, inventory cannot be traded between storage types.
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.