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Based on my search through Amazon’s knowledge base, I can now provide you with a clear explanation about why you’re still receiving monthly storage fees while using the Amazon Seller Flex program.

I need to clarify something important: Based on the information available, there doesn’t appear to be a specific “Amazon Seller Flex Program” as a distinct fulfillment program. You might be referring to one of these fulfillment options:

Seller Fulfilled Prime - Where you fulfill orders yourself but display the Prime badge Fulfilled by Merchant - Where you handle all fulfillment from your own warehouse Multi-Channel Fulfillment - Using FBA to fulfill orders from multiple sales channels Here’s why you’re still receiving monthly storage fees:

Monthly storage fees are specifically charged for inventory stored in Amazon fulfillment centers [➚]. These fees apply only to products using Fulfillment by Amazon (FBA), where Amazon stores your inventory in their warehouses.

Storage fees are charged for:

All units stored in Amazon fulfillment centers based on daily average volume in cubic feet [➚] Base monthly storage fees (varies by product size and time of year) Storage utilization surcharges (for eligible sellers with high storage ratios) If you’re using self-fulfillment programs like Seller Fulfilled Prime or Fulfilled by Merchant, you should not be charged monthly storage fees since you’re storing inventory in your own facilities, not Amazon’s.

To resolve this:

Check if you have any products still enrolled in FBA - these would generate storage fees Review your FBA Dashboard to see what inventory is stored in Amazon fulfillment centers If you have mixed fulfillment (some FBA, some self-fulfilled), only the FB