Amazon charges standard and long-term storage fees separately from fulfillment fees, and both need to be tracked against inventory age to catch unnecessary charges before they build up. Accurate Amazon bookkeeping also helps monitor reimbursement claims for lost or damaged inventory, which have specific filing windows. Sellers who do not reconcile FBA inventory reports regularly may miss deadlines to claim money they are owed.

Selling across a DTC channel and Amazon at the same time requires syncing inventory counts and cost of goods sold between both platforms, since each one tracks and reports sales differently. Brands that manage each channel’s books separately often end up with inventory numbers that no longer match reality, which distorts true profitability. 

Amazon settlements bundle sales, refunds, fees, and reserve holdbacks into a single payout, which almost never matches gross sales for the period. Proper Amazon bookkeeping requires breaking the settlement report into its individual components and matching each one against the ledger, helping ensure the final deposit is fully reconciled.

Amazon reserves a portion of seller payouts to cover potential refunds, chargebacks, or claims, releasing it on a delayed schedule. Tracking reserve balances separately from available cash is the only way to know what is genuinely accessible versus what is temporarily held. 

Accurate per-SKU profitability requires tracking COGS, FBA fees, referral fees, and storage costs separately, since fee structures can change by category and season. Detailed Amazon bookkeeping provides SKU-level visibility into these costs, helping sellers identify which products are actually profitable instead of relying on blended numbers that can hide weak margins.