Read the measurement basis in the agreement
Find the signed rate schedule and determine what the warehouse bills: pallets, bins, shelves, cubic volume, another capacity unit or a contractual minimum. Identify the measurement dates and any partial-period rule. A lower ending unit count does not necessarily imply a lower storage bill if the business still occupies the same chargeable locations.
ShipBob's fulfillment-cost explanation identifies storage charges based on space such as bins, shelves and pallets, separately from other fulfillment activities. That illustrates why inventory units alone are insufficient for checking a storage invoice. Use the actual provider agreement for rates and measurement rules; published descriptions are not a substitute for the business's contract.
References: ShipBob: Fulfillment costs explained
Rebuild the billed occupancy
Obtain the supporting location or capacity report for each warehouse. Compare occupied spaces with receiving, transfers, consolidations and removals during the billed period. Keep product quantities alongside space usage, but do not assume a one-to-one relationship. A nearly empty pallet position can remain chargeable until the warehouse consolidates it under the agreement.
For a hypothetical contract charging $20 for each occupied pallet position for the full month, 30 positions produce $600 before other charges. If the warehouse report shows 26 positions at month end, ask whether four positions were occupied on the contract's measurement date or whether a different timing rule applies. The discrepancy needs the agreed measurement basis, not an automatic $80 credit request.
Review stock in receiving, quarantine and returns areas. Determine whether the agreement bills those locations differently and whether the invoice classifies them correctly. Retain evidence of requested consolidations and the warehouse's completion date.
Separate minimum charges and special storage
Identify contractual minimums, reserved capacity and special handling or storage conditions. A minimum can remain payable when actual activity falls, while a temporary extra space charge may need separate authorization. Compare changes with the contract version effective during the period. Keep a disputed amount distinct from the portion the business accepts.
Check whether storage appears inside another bundled fulfillment fee as well as on a separate invoice. Ask the provider to explain the intended pricing structure before treating both lines as valid. The accountant needs a clear service-period and charge description to apply the reporting policy; the word storage alone does not determine whether a cost belongs in inventory.
Allocate cost using a driver that explains the space
For management analysis, allocate shared storage using a documented measure of space and time where practical. Equal cost per unit can mislead when one product occupies a large carton and another occupies a small bin. Show unallocated contractual minimums separately if spreading them across a few units would conceal the capacity decision.
Give purchasing and operations a report of slow-moving stock occupying expensive space, with the costs of consolidation or removal included. Confirm any resulting action with the warehouse and inspect the next bill for its effect. Close invoice disputes with a credit or accepted explanation, retaining the occupancy evidence that supported the final amount.
Sources
Requirements and product details can change. Check the linked guidance for the facts that apply to your situation.
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