FBA inventory storage overage fees

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 is subsequently reduced to a level 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. For more information, visit FBA inventory 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 this fee is assessed and charged:

You can check if you are over your limit at any time by viewing the Storage Monitor on the Inventory Performance dashboard or in the Shipping Queue. You will see an alert icon if you are over your limit. If you are over your limit, you can calculate your current overage for that storage type by subtracting your current usage from your current storage limit. We will also send you weekly alerts if you are over your limit for each storage type and you will incur inventory storage overage fees.

The Inventory storage overage fees report provides the inventory storage overage fees for each storage type and day your inventory in Amazon fulfillment centers exceeded your storage limits. This month-end report is available for download starting the second day of the following month. It is available from the Reports menu by selecting Fulfillment and on the resulting page selecting Inventory storage overage fees under Payments on the left.

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We provide an estimate of your monthly inventory storage overage fee by storage type using the following formula:

Estimated monthly overage fee = (current overage x daily overage rate x charge days remaining in month) + monthly overage fees incurred to date

Current overage = current usage – current limit

Daily overage rate = $10 / number of days in current month

Charge Days Remaining in Month = number of days in current month – current day number + 1

Example:

Standard-size storage limit = 100 cubic feet

Inventory = 110 cubic feet

Today = July 12

Charge days in current month = 31 – 12 + 1 = 20

Daily overage rate = $10 / 31 = $0.322581

Current overage = 10 cubic feet

Monthly overage fees incurred to date = $50 (calculated from overage already incurred in days 1-11)

Estimated monthly overage fee = (10 * $0.322581 x 20) + $50 = $114.5162

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.

How do I know if I am subject to the inventory storage overage fee?

If you have a Professional selling account, you are subject to the overage fee if you have exceeded your current limits for a given storage type by the end of the day for any day in a given month. This charge will occur even if your inventory was subsequently reduced to a level below your storage limits allocated for that month.

How can I determine which SKUs are contributing to my current usage for a storage type?

Current usage is a real-time representation of your on-hand inventory minus any pending removals. FBA Inventory Age provides a list of all of your active FBA listings, along with their storage type (standard-size, oversize, apparel, footwear, flammable, or aerosol) and how much volume the ASIN is taking up (Available units x volume per unit = cubic feet). This information is also available via the Inventory Age report.

While the Inventory Age data is good way to approximate current usage, it may not match your current usage value displayed on the Storage Monitor for a few reasons.

1. Current usage is a real-time data source, and the Inventory Age report data may be delayed up to 72 hours due to data processing times.
2. Current usage includes unsellable inventory and excludes any units pending removal, and these values are not included on the Inventory Age and the associated report.
3. Inventory that does not have an active listing may be counted in current usage (such as stranded inventory).

When will I be charged inventory storage overage fees?

You will be charged applicable inventory storage overage fees after the end of the month in which the fees were incurred. For example, let’s say that you exceeded your storage limit on July 1 and removed inventory to a level below your limit by July 5. On August 1, you would be charged for the four days you were over the limit in July.

Do inventory storage overage fees apply to flammable and aerosol storage?

No, overage fees are not charged if you exceed your flammable or aerosol storage. Overage fees apply only to standard-size, oversize, apparel, and footwear storage types.