How to Audit Amazon FBA Aged Inventory and Surcharges

Start with the FBA Inventory view or report, aged inventory data, excess inventory, monthly storage fees, aged inventory surcharge detail, recommended removals, and removal-order status available to the account. Amazon's FBA business-report directory identifies these as separate report families. Record marketplace, seller SKU, FNSKU, ASIN, condition, disposition, fulfillment method, units, age band, volume, estimated fee, charged fee, report date, and source file. Do not merge different marketplaces or conditions into one product total.

Amazon's current FBA fee guidance distinguishes fulfillment costs, monthly storage, and other costs that can include aged inventory, returns processing, removals, disposal, and inbound placement. Keep each cost in its own column. An estimated aged surcharge is not a settled payment, and a monthly storage charge is not automatically an aged surcharge. Reconcile charged amounts to the payment or fee report before describing money as paid, avoided, or recovered.

For every material aging line, compare current age and units with the Inventory Ledger, receipts, customer shipments, returns, removals, disposals, adjustments, and transfers. A high age bucket can reflect real slow movement, a disposition change, a timing gap, or a reporting issue. Use stable SKU and FNSKU identifiers and preserve the report timestamps. Do not infer the exact receipt date from a broad age band unless the source provides that precision.

Separate sellable, reserved, unfulfillable, researching, and removal-pending units. A single product can contain inventory in several states with different available actions. Confirm that the offer is active and buyable before attributing weak movement to demand. Check inbound supply and open purchase commitments so a removal decision is not followed by an automatic replenishment. If the quantity itself is disputed, reconcile it before comparing disposition options or estimated fees.

For each SKU, calculate a scenario from verified inputs: expected selling price, referral and fulfillment costs, advertising or promotional spend when planned, storage and aging costs, removal or disposal cost, liquidation proceeds when available, return freight, handling, and inventory value under the approved accounting method. Label every estimate and date. Do not reuse a percentage from another product or claim that a promotion will clear inventory without observed evidence.

Evaluate hold, price change, advertising change, outlet or other eligible sales program, liquidation, return, disposal, or no action. Confirm program eligibility and operational deadlines in the account. Preserve brand, channel, pricing, and customer-experience constraints. The cheapest immediate fee option may create a larger inventory or brand problem, while a higher short-term cost may preserve usable stock. Route tax, accounting, hazardous-material, and regulated-product questions to the authorized owner.

Approve one action with SKU, units, marketplace, deadline, owner, evidence, maximum cost, and stop condition. If creating a removal or disposal order, record the request identifier, quantity, status, address or destination under protected access, expected processing window, and related fee evidence. If testing price or promotion, define the product set, period, inventory guardrail, and rollback. Do not mark units resolved when the request is submitted; wait for completed movement and the next ledger update.

Monitor cancellations, partial removals, stranded units, returns, liquidation status, sell-through, and new inbound inventory. A removed unit can still appear in an earlier snapshot, and a requested action can fail. Keep the aged-inventory queue tied to source statuses instead of manually deleting a line. If the chosen program is unavailable or economics change, reopen the decision with the current evidence rather than carrying forward the prior forecast as fact.

After the applicable reporting and billing cycle, compare prior units and estimates with the new age report, ledger movements, removal completion, and actual fee detail. Classify the result as completed, partial, failed, still processing, or inconclusive. Reconcile both quantity and money. Do not describe avoided cost as actual savings unless the comparable charge would otherwise have occurred and the evidence supports that counterfactual; report the verified action and observed fee instead.

Review recurring aged inventory by launch cohort, supplier, inbound size, forecast owner, listing status, returns, and replenishment rule. Improve purchase quantities, reorder points, inbound timing, catalog retirement, or exception alerts only where repeated evidence supports the change. Set a review cadence before the next age threshold and include outstanding inbound inventory. The durable control is an age-aware replenishment and disposition ledger, not a one-time clearance event that leaves the same automatic ordering rule in place.

Publish an internal review table with age band, units, inventory value method, estimated next charge, actual prior charge, open action, deadline, and confidence. Require the operator to explain material changes from the prior review. A falling aged-unit count can come from sales, removals, disposals, transfers, or adjustments, and those outcomes have different economics. Keep the movement source beside the trend so the team does not reward a lower count that was achieved through an expensive or unintended disposition.