Amazon Ends Commingled Inventory Effective March 31, 2026

March, 2026
Abdullah Zafar

Amazon Ends Commingled Inventory Effective March 31, 2026

Amazon announced a major change to its FBA system: commingled inventory will be fully discontinued starting March 31, 2026.

This marks one of the biggest operational shifts in recent years for Amazon sellers. It will impact how inventory is labeled, tracked, and fulfilled across the entire network.

What Is Commingled Inventory?

Commingling allowed Amazon to pool identical products from multiple sellers under one listing (same UPC) and ship the closest available unit regardless of which seller originally supplied it.

While this improved delivery speed, it also created issues like:

Counterfeit or low-quality units affecting legitimate sellers
Negative reviews tied to the wrong seller
Loss of control over inventory quality

What’s Changing on March 31, 2026

From March 31 onward:

No more pooled inventory: Each seller’s inventory will be tracked and fulfilled separately
Stricter barcode requirements: Labeling rules will differ based on seller type
Inventory accountability increases: You are now fully responsible for your own units, and no cross-seller fulfillment
Deadline applies to inbound shipments: Even if created earlier, inventory arriving after March 31 must comply

The New Labeling Rules for Amazon Sellers

The following are the new labeling guidelines for sellers:

1. Brand Owners (Brand Registry)

Brand owners enrolled in Brand Registry can continue using manufacturer barcodes such as UPC or EAN for their products. In most cases, they are not required to apply Amazon (FNSKU) labels, which gives them greater flexibility in how they manage and distribute their inventory across Amazon’s fulfillment network.

2. Resellers (Not in Brand Registry)

Resellers who are not part of Brand Registry, however, must use Amazon barcodes (FNSKU) for all their products. This requirement applies even if the product already has a valid manufacturer barcode, ensuring that each seller’s inventory is tracked separately and accurately.

3. Products Without Manufacturer Barcode

For products that do not have a manufacturer barcode, all sellers, regardless of their status, are required to apply Amazon labels (FNSKU) before sending inventory to fulfillment centers.

What This Means for Sellers

This update will give the sellers better brand protection by eliminating the issue of “bad inventory” from other sellers. Sellers will have clear accountability for reviews and defects of their products. However, this update presents some additional challenges too, such as:

Increased prep and labeling requirements (especially for resellers)
Potential operational costs (labeling, prep centers)
Need for stricter inventory management

What Should Amazon Sellers Do

For successfully adapting to the new Amazon FBA policy, sellers should:

Audit your current listings and barcode setup
Transition to FNSKU labeling if required
Ensure all shipments arriving after March 31, 2026, are compliant
Consider enrolling in Brand Registry (if eligible)
Review your prep and logistics workflows

Final Takeaway

This update signals a shift toward a more controlled, brand-safe Amazon marketplace. Sellers who adapt early, especially by optimizing inventory processes, will be in a stronger position to scale without risk.