Amazon FBA bookkeeping breaks down at the exact point most sellers try to shortcut it: recording the settlement deposit that hits your bank account as a single revenue line. That deposit is actually a net figure — gross sales minus Amazon's referral fees, FBA fulfillment fees, storage fees, advertising spend, refunds, and reserve holds, all bundled into one transfer every two weeks. Booking it as one number means your P&L shows a deposit, not a business — you can't see true revenue, true fee expense, or true product cost separately.
The fix is reconciling the settlement report line by line, not booking the net deposit. Each settlement period should post gross product sales as revenue, referral fees and FBA fees as separate expense categories, refunds as a contra-revenue or refund expense line, and advertising (Amazon PPC) as its own marketing expense — so your P&L actually shows what each of those categories costs you, not just what's left over.
Reserves are the piece sellers most often lose track of. Amazon holds back a portion of your funds — for new accounts, high-return categories, or general risk — and releases it later, sometimes weeks after the sale it relates to. An unreconciled reserve either disappears from your books entirely (understating cash you're actually owed) or gets miscounted as a loss when it's really just delayed, not gone.
True cost of goods sold (COGS) for an FBA seller goes well beyond the unit cost you paid your manufacturer. It should include inbound freight and customs duties to get inventory to Amazon's warehouse, FBA fulfillment fees (pick, pack, and ship per unit), and storage fees (which scale with how long inventory sits, and spike sharply during Q4 peak season). Sellers who only track manufacturer unit cost as COGS are looking at a gross margin that's meaningfully overstated — and pricing or ad-spend decisions made from that inflated margin compound the problem.
Inventory valuation adds another layer for sellers running multiple SKUs or reordering at different unit costs over time: without a consistent method (typically FIFO for most small e-commerce sellers), COGS on units sold this month can be miscalculated based on which cost basis actually applies to those specific units, especially when a reorder came in at a different landed cost than the batch before it.
Multi-channel sellers — FBA plus Shopify, plus Walmart or eBay — face the added task of consolidating settlement data from every channel into one chart of accounts without losing the channel-level detail that shows which channel is actually profitable once fees and ad spend are accounted for, not just which one has the most top-line sales.
None of this replaces your CPA at tax time — inventory accounting method elections, COGS timing, and cost capitalization decisions should be made with your CPA. What clean FBA bookkeeping does is make sure the underlying data — true gross sales, true fee expense by category, true landed COGS per unit, and reconciled reserves — is accurate and ready when your CPA needs it, instead of a settlement-report PDF and a guess.
Our team reconciles Amazon (and other marketplace) settlement reports line by line — separating gross sales, fees, refunds, advertising, and reserves — and builds landed COGS tracking that includes freight, duties, and fulfillment fees, not just unit cost. New clients get a free historical cleanup, so settlements that have only ever been booked as net deposits get rebuilt to show what's actually happening in the business.
If your FBA books currently show a deposit total instead of real revenue, fees, and margin, a short discovery call is the fastest way to see what a properly reconciled settlement and COGS system would actually show you.
| What the books should show | Reconciled (line-by-line) | Common shortcut (net deposit only) |
|---|---|---|
| Gross sales | Recorded as revenue, separate from fees | Netted away, invisible |
| Referral & FBA fees | Tracked as their own expense categories | Bundled into the deposit total |
| Advertising (PPC) | Its own marketing expense line | Often mixed into "fees" generally |
| Reserves | Tracked as held funds, reconciled on release | Disappear or get miscounted as loss |
| COGS | Unit cost + freight/duties + fulfillment fees | Manufacturer unit cost only |
| True margin visibility | Clear, category by category | Effectively invisible |
An Amazon settlement deposit is a net figure, not revenue — reconciling it line by line and tracking true landed COGS is what actually shows an FBA seller their real margin.
Frequently Asked Questions
Why shouldn't I just book my Amazon settlement deposit as revenue?
The deposit nets together gross sales, referral fees, FBA fees, refunds, advertising, and reserve changes into one number. Booking it as revenue hides your true sales, true fee expense, and true margin — you can't manage what you can't see broken out.
What counts as true COGS for an FBA seller?
Manufacturer unit cost plus inbound freight and customs duties, FBA fulfillment fees, and storage fees. Tracking only the unit cost you paid your manufacturer overstates your actual gross margin.
What happens to Amazon reserve holds in my books?
Reserves should be tracked as held funds you're owed, not lost revenue, and reconciled when Amazon releases them — often weeks after the related sale. Left unreconciled, reserves either vanish from the books or get miscounted as a loss.
Can you help if my FBA books have only ever tracked net deposits?
Yes. New clients receive a free historical cleanup, so we can rebuild settlement history line by line and establish proper landed-COGS tracking going forward.