Amazon FBA inventory accounting comes down to tying the Amazon settlement detail, FBA inventory movements, and your general ledger together so the month-end financials show what actually occurred. Below is a practical monthly workflow—with illustrations and a short checklist—for sellers who want dependable books without glossing over deposits, fees, returns, or reimbursements.
Scope disclaimer: This guide explains practical bookkeeping processes and documentation. It does not provide individualized tax or legal advice. For guidance that applies to your business and accounting method, consult a tax professional or the IRS resources linked below.
Why Amazon deposits are not revenue reports
It’s tempting to take the Amazon bank deposit and treat it as “sales.” That shortcut backfires. The deposit is a net number after referral fees, FBA fulfillment charges, refunds, advertising, reserves, and adjustments. Amazon’s disbursement cadence and the related settlement report carry the detail you need for bookkeeping; the deposit is only the cash leg you will reconcile to that detail.
Think of the deposit as a bank-reconciliation item—not a revenue report. The settlement report breaks out gross product sales, marketplace fees, FBA fulfillment fees, shipping credits, refunds, promotions, and advertising charges. Posting those lines separately preserves gross revenue, keeps fees in operating expenses instead of burying them in COGS, and supports correct COGS when inventory is relieved from FBA. For program context and seller tools, see Amazon Seller: Fulfillment by Amazon and Amazon Seller: Learn.
Illustrative example (not a client story)
Illustrative: A settlement period shows gross sales $10,000, refunds $300, FBA fulfillment fees $1,200, Amazon referral fees $1,000, advertising $400, and a net deposit of $6,900. If you record the $6,900 as “sales,” you understate revenue and blur which costs reduced margin. Recording each line as its own ledger entry shows $10,000 of sales, the separate fee expenses, the refunds, and a clear gross margin.
That separation matters. It supports SKU-level margin analysis, clarifies the effect of promotions, and gives lenders and advisors a cleaner view of performance. It also reduces rework at tax time because your income and expense classifications already align with the underlying settlement activity.
The separate records sellers need for settlements and inventory
Keep two connected but distinct sets of records: settlement activity and inventory source records. Settlement documentation shows what Amazon charged and paid in a period. Inventory records show what you bought, what you shipped to FBA, what sold, and what remains. Keeping them distinct allows you to pinpoint whether a variance is a cash-timing issue, a fee issue, or a stock-count issue.
Settlement-related records
- Amazon settlement report for each disbursement period (download and archive in CSV/PDF)
- Date-range or transaction reports for orders, refunds, promotions, and reimbursements
- Advertising invoices and any promotional credit memos
- Bank deposit details and bank statements for reconciliation support
Inventory-related records
- Supplier invoices and receipts (evidence of unit costs and terms)
- Inbound-to-FBA shipping and receiving confirmations
- Amazon inventory reports (Available, Reserved, Inbound, and FBA Fulfilled Inventory)
- Documentation for cost adjustments, write-offs, removals, and Amazon reimbursements
IRS guidance emphasizes documentation that supports income, deductions, and credits. See general recordkeeping resources (IRS Recordkeeping, IRS: What Records Should I Keep?) and IRS Publication 538 when selecting and applying an accounting method that affects inventory and COGS recognition.
In day-to-day work, tie settlement activity to inventory movement by SKU and by inbound shipment when possible. If you use inventory or accounting software that imports Amazon data, confirm that the import mapping matches your chart of accounts and save independent exports of the source reports. Those exports are your evidence if you need to show how numbers flowed into the ledger.
A practical monthly settlement workflow
Below is a straightforward monthly close process designed for most small FBA sellers. Adjust frequency and labeling to fit your accounting system. If you use QuickBooks Online, the QuickBooks Online test-drive walkthrough is a quick way to practice the entries before changing live books.
- Download the full Amazon settlement report for the month and any partial-period reports that overlap month-end. Save CSV and a locked PDF to a dated folder with a consistent naming convention.
- Capture Amazon inventory snapshots for the same period end: available, reserved, inbound/transit, and customer returns.
- Map settlement lines to your chart of accounts: gross sales, sales returns, shipping income, referral fees, FBA fees, advertising, promotions, and reimbursements.
- Post sales at gross, not net deposit. Record refunds/returns to a contra-revenue account. Post Amazon referral and FBA fulfillment fees to operating expense accounts, not COGS.
- Record returns against sales and evaluate the inventory impact: units returned to sellable inventory increase inventory and reverse COGS; units marked unsellable require a write-down and documentation.
- Calculate COGS for the units shipped to customers during the month and record the inventory reduction. Apply your chosen cost-flow assumption consistently.
- Reconcile the settlement totals to cash. Sum sales less refunds and fees, then match to the bank deposits for the period. Create reconciling entries for timing differences, holds, or reserves and clear them during your bank reconciliation.
- Review and record Amazon reimbursements for lost or damaged inventory.
- Document adjustments and file copies of Amazon reports and supplier invoices alongside your month-end reconciliation worksheet.
Mapping common settlement lines to ledger accounts (illustrative)
| Settlement line | Typical ledger account (example) | Debit/Credit direction (illustrative) |
|---|---|---|
| Gross product sales | Sales — Product Revenue | Credit Sales; Debit Accounts Receivable/Clearing or Bank |
| Refunds and returns | Sales Returns & Allowances | Debit Sales Returns; Credit Accounts Receivable/Clearing or Bank |
| Amazon referral/marketplace fees | Marketplace Fees (expense) | Debit Expense; Credit Accounts Payable/Clearing or Bank |
| FBA fulfillment fees | Fulfillment Fees (expense) | Debit Expense; Credit Accounts Payable/Clearing or Bank |
| Advertising charges | Advertising Expense | Debit Expense; Credit Accounts Payable/Clearing or Bank |
| Inventory reimbursements | Other Income or Inventory Adjustment | Debit Bank/Receivable; Credit Other Income or Inventory |
Account names will vary by chart of accounts, but the structure stays the same: revenue is recorded gross, fees reduce profit through expenses, and cash is reconciled to settlement detail. When one bank deposit covers more than one settlement period, use a dated clearing account per settlement to make matching straightforward and auditable.
Sample journal entries (illustrative)
- At time of sale: Debit Accounts Receivable or Settlement Clearing $100; Credit Sales Revenue $100.
- When settlement shows fees: Debit Marketplace Fees Expense $15; Debit Fulfillment Fees Expense $10; Credit Accounts Receivable or Settlement Clearing $25.
- When bank deposit arrives: Debit Bank $65; Credit Accounts Receivable or Settlement Clearing $65.
A simple practice that pays off: close each settlement to a zero balance in its own clearing account. You will be able to show exactly how the deposit relates to the period’s sales, fees, and refunds without sifting through unrelated entries.
Amazon FBA inventory accounting: COGS, returns, reimbursements, and fee review
Inventory accounting has three moving parts: capturing cost, applying a cost-flow method, and recognizing cost in the right period. IRS Publication 538 discusses methods and the process for changing them. If you are selecting or changing a method that affects when you recognize COGS, confirm requirements with a tax professional and follow the IRS process.
COGS recognition with FBA
Most sellers recognize COGS when a unit is shipped to a customer because it is no longer available for sale. With FBA, that typically lines up with a shipped order in Amazon reports. Use order-level detail and FBA inventory movement to tie quantities shipped to your cost layers and retain supplier invoices to support unit costs.
Whether you use FIFO or weighted-average, consistency is key. Track receiving dates and unit costs for each inbound to FBA. If you later change your cost-flow method for tax purposes, understand the approval requirements in Publication 538 and maintain documentation that bridges old and new methods.
Returns and refunds
Returns require two decisions: revenue and inventory. First, book the refund to Sales Returns & Allowances. Then decide how inventory is affected. If Amazon returns a sellable unit to stock, reverse the original COGS at the same unit cost and increase inventory. If the unit is unsellable, record a write-down and keep Amazon’s return and disposition evidence.
Reimbursements
Amazon may reimburse you when inventory is lost or damaged under its control. When a reimbursement posts, save the case file and reimbursement report. Then record the accounting impact in line with your policy and document the choice consistently.
Fee review and periodic assessment
FBA and referral fees can move your margin more than you expect. Set a monthly review to compare actual fees to expectations by SKU or product group. Keep advertising and promotions in their own expense lines so ROI analysis remains visible.
A month-end reconciliation checklist
- Download and archive the settlement report(s) for the month along with order, refund, promotion, and reimbursement detail.
- Reconcile gross sales, refunds, and adjustments from Amazon reports to your sales ledger totals.
- Post marketplace and FBA fees to operating expense accounts—do not net them against sales or hide them in COGS.
- Compute and record COGS for units confirmed shipped in the month.
- Compare the Amazon inventory snapshot to the general ledger inventory balance and research any variance line-by-line.
- Record Amazon reimbursements or inventory write-offs and attach the related case files or disposition reports.
- Complete bank reconciliations so deposits and withdrawals match statements.
- Post necessary adjusting entries; refer to the adjusting entries guide as needed.
- Save all reports and supporting vendor documents for your retention period in an organized folder structure.
Typical reconciling items table (illustrative)
| Reconciling item | Why it happens | Suggested ledger action |
|---|---|---|
| Deposit timing difference | One payout covers multiple settlement windows | Use a clearing account; reconcile per settlement and clear next period |
| Missing fee line | Late-applied fee posts after your report cutoff | Record an accrual or adjust in the next period with a note |
| Inventory shrinkage | Lost, damaged, or unaccounted units within FBA | Open an Amazon case; write off unsalvageable units with documentation |
Keep a dated reconciliation worksheet that ties settlement subtotals to ledger postings and to bank deposits. Attach it to your month-end file along with the source reports.
What to bring to a tax preparer or bookkeeper
When you ask a preparer or bookkeeper to review your Amazon records, bring these items so the review moves quickly and nothing material is guessed at:
- Amazon settlement reports for the tax year and current year-to-date
- FBA inventory reports showing quantities, reserved stock, and dispositions
- Supplier invoices and receipts supporting the inventory cost per SKU
- Bank statements and merchant account statements covering the same periods
- Advertising invoices and campaign spend reports
- Documentation for Amazon reimbursements, claims, and appeals
- Sales tax filings and reports, if you collect sales tax
Your preparer may reference IRS Publication 538 and Publication 583 when advising on inventory and period issues. Organizing these items up front shortens the review and reduces follow-up questions.
See the guide to understanding financial statements and the cash flow overview for a refresher on how sales, COGS, operating expenses, and cash movement line up in a typical close.
Why this guide is different
The closest related page on this site covers inventory methods in a different context. This guide focuses on Amazon settlement reports, marketplace and fulfillment fees, refunds, returns, and the FBA inventory records that drive COGS. It stays centered on the reconciliation points that commonly misstate revenue, distort COGS, or trigger tax adjustments for FBA sellers.
What you will see emphasized here: specific steps, disciplined archiving, and a clear audit trail. The approach maps Amazon line items to your chart of accounts, documents exceptions, and equips you to explain variances to your lender, accountant, or a tax authority—without rebuilding a month from scratch.
Professional next step
If you want a quick review of your monthly settlement and inventory workflow or help setting up the accounting mappings, contact Daniel Sandler, CPA for an initial discussion: contact Daniel Sandler, CPA.
Consider asking a preparer to review one closed month end. Have them validate the settlement mapping, sample a SKU’s COGS calculation, and examine your reconciliation worksheet.
Frequently asked questions
Should I book an Amazon deposit as sales?
No. Treat the deposit as a cash receipt. Use the settlement report to post gross sales, refunds, and each fee line. Then reconcile the deposit to that report during bank reconciliation so cash ties out to the detail.
How often should an FBA seller reconcile inventory?
Monthly at a minimum. Higher-volume sellers or thin-margin operations may reconcile more often. Use Amazon inventory reports and purchase records to verify quantities and costs, and keep documentation consistent with general IRS recordkeeping guidance.
What documents should I keep for Amazon inventory purchases?
Keep vendor invoices, purchase orders, bills of lading or shipping confirmations, FBA inbound confirmations, and any customs documents when applicable. These support your inventory cost basis and align with the recordkeeping expectations described by the IRS.