If you're an Amazon FBA seller, you already know that your business moves fast. Products sell, fees get deducted, reimbursements arrive, and returns pile up — all before you've had your morning coffee. The problem? Most sellers have absolutely no idea what their real net profit is at the end of any given month.
This isn't a lack of intelligence. It's a structural problem with how Amazon pays you. And once you understand it, you can fix it — permanently.
💡 Key Takeaway
Amazon FBA sellers who implement proper bookkeeping typically discover their actual profit margin is 15–25% different from what they thought. Sometimes higher — often lower. You need to know the truth.
Why Amazon Bookkeeping Is Different from Normal Business Accounting
When a traditional retail business makes a sale, the transaction is simple: customer pays, money arrives in the bank. But Amazon FBA works through a settlement process that bundles dozens of different transaction types into a single bi-weekly deposit. That deposit includes:
- Product sales revenue — gross sales across all SKUs
- Referral fees — typically 8–15% of the sale price depending on category
- FBA fulfilment fees — pick, pack, and ship charges per unit
- Monthly storage fees — based on cubic feet of inventory stored
- Long-term storage fees — for inventory stored over 365 days
- Return processing fees — when customers send items back
- Reimbursements — when Amazon loses or damages your inventory
- Advertising credits or charges — Sponsored Products, Brands, Display
- Refunds issued — to customers minus Amazon's return fee
- Subscription fees — Professional selling plan at $39.99/mo
When all of these are bundled into one bank deposit every two weeks, most sellers simply book the deposit as "revenue." This is one of the most common — and costly — bookkeeping mistakes in eCommerce.
⚠ Booking your Amazon deposit as revenue inflates your gross income, overstates your tax liability, understates your true margins, and makes it impossible to spot which products are actually profitable.
Step-by-Step: How to Properly Reconcile Amazon Settlement Reports
Step 1: Download Your Settlement Reports
In Seller Central, navigate to Reports → Payments → All Statements. Download the flat file (.txt) for each settlement period. This is the raw data that contains every single transaction bundled into your deposit.
Step 2: Separate Revenue from Fee Categories
Using A2X (our recommended tool) or a detailed spreadsheet, map each transaction type to the correct accounting category:
| Amazon Transaction Type | Accounting Category | Tax Treatment |
|---|---|---|
| Product Sales | Gross Revenue | Taxable income |
| Referral Fees | Cost of Sales / Platform Fees | Tax deductible |
| FBA Fulfilment Fees | Fulfilment / COGS | Tax deductible |
| Storage Fees | Inventory / Storage Costs | Tax deductible |
| Advertising Spend | Marketing Expenses | Tax deductible |
| Reimbursements | Other Income | Taxable income |
| Refunds Issued | Sales Returns | Revenue reduction |
Step 3: Track COGS Separately
Your Cost of Goods Sold (the price you paid for the products you sold) must be tracked separately from Amazon fees. This requires knowing your landed cost per unit — purchase price + freight + customs + prep fees — and matching it to the units sold in each settlement period.
✓ Pro tip: Use a FIFO (First In, First Out) or weighted average cost method consistently. Your accountant should help you choose the right method for your business and apply it consistently across all tax years.
Step 4: Reconcile Every Settlement to Your Bank
Once you've mapped all line items, the net of all transactions should equal the deposit that hits your bank account. If the numbers don't match, there's an error somewhere — either a missing transaction, a refund that wasn't properly recorded, or a reserve amount Amazon is holding.
Step 5: Close the Books Monthly
Don't wait for year-end to review your financials. A monthly close process — ideally on the 5th business day of the following month — gives you:
- Accurate P&L for the prior month
- Inventory valuation update
- Cash flow position
- Running tax liability estimate
Struggling with Amazon Settlement Reports?
Our bookkeeping team handles this every day for 500+ sellers. We set up A2X, connect it to your Seller Central, and reconcile every settlement automatically — giving you clean books without lifting a finger.
Get a Free Consultation →The Tools You Need for Amazon FBA Bookkeeping
A2X — The Essential Amazon Reconciliation Tool
A2X connects directly to Amazon Seller Central and your accounting software (QuickBooks or Xero) and automatically maps every settlement to the correct accounting category. It transforms a 500-line settlement report into clean, organised journal entries in minutes. At TSA & COO, we use A2X for 100% of our Amazon clients.
QuickBooks Online or Xero
Your main accounting platform where all transactions are ultimately recorded. Both work well with A2X. QuickBooks has a slight edge for US sellers due to its sales tax features; Xero is generally preferred for UK/international sellers due to its VAT handling and bank feed reliability.
Inventory Lab or Seller Board
For COGS tracking at the SKU level, these tools integrate with Seller Central and track landed cost, helping you see profitability per product in real time.
Common Amazon Bookkeeping Mistakes That Cost Sellers Thousands
- Recording the bank deposit as revenue — As we've covered, this overstates your income and distorts your margins.
- Not tracking reimbursements as income — Amazon reimbursements for lost/damaged inventory are taxable income. Many sellers miss these entirely.
- Ignoring the Amazon reserve — Amazon often holds a reserve of your funds (sometimes 7–21 days of sales). This is not lost money — it's a timing difference that must be correctly accounted for.
- Mixing personal and business finances — Run all Amazon-related transactions through a dedicated business bank account. Mixing personal expenses creates an accounting nightmare at tax time.
- Not accounting for sales tax collected by Amazon — Amazon collects and remits sales tax on your behalf in marketplace facilitator states. This should not appear as your revenue.
How Much Does Poor Amazon Bookkeeping Actually Cost?
In our experience working with hundreds of Amazon sellers, poor bookkeeping typically results in one or more of the following:
- Overpaying income tax by 10–20% due to not deducting all allowable expenses
- Missing $2,000–$15,000 in annual Amazon reimbursements that were never claimed
- Making buying decisions based on incorrect margin data, leading to unprofitable restocks
- Failing to identify slow-moving SKUs that are accumulating long-term storage fees
- Being unable to get business loans or investment due to lack of clean financial records
📈 Real Client Result
One of our Amazon FBA clients (UK seller, $420K/year revenue) discovered after a bookkeeping cleanup that they had been overstating their COGS by 12% and understating their true net profit. The corrected books showed they were significantly more profitable than they thought — enabling them to secure a £50,000 inventory finance facility they previously thought was out of reach.
When Should You Hire an Amazon Bookkeeper?
The honest answer: as soon as possible. But practically speaking, if any of the following apply to you, it's time to get professional help:
- You're doing more than $5,000/month in sales
- You're selling in more than one country
- You have more than 20 active SKUs
- You haven't filed taxes correctly in the past 1–2 years
- You're considering taking on investors or external finance
At TSA & COO Private Limited, our Amazon bookkeeping service starts from $149/month and includes full settlement reconciliation, monthly P&L, and QuickBooks or Xero access. Book a free consultation to get started.