Navigating 2026–2027 Inbound Logistics & Inventory Buffers
The Economics of Shipment Splitting
Amazon's inbound placement fee structure incentivizes sellers to distribute inventory geographically. By sending inventory to 4+ fulfillment centers, sellers bypass the placement fee entirely ($0.00/unit), but must negotiate competitive multi-destination freight with carriers.
Avoiding the 28-Day Inventory Cliff
When stock drops below 28 days of supply, Amazon penalizes every shipped unit with a surcharge between $0.32 and $1.11. To prevent this without inflating Q4 aged storage fees, top sellers aim for a 35 to 55 day rolling inventory window.
Frequently asked questions
When is paying the Minimal Split placement fee worth it?
When shipping small carton quantities (under 150 units) where booking 4 separate carrier shipments incurs multiple minimum box charges that exceed the per-unit placement fee.
How does Amazon determine Historical Days of Supply (HDOS)?
Amazon calculates HDOS by dividing your average daily on-hand inventory by your average daily dispatched units across both the trailing 30-day and 90-day windows.