How To Do Amazon Accounting & Bookkeeping

A healthy bank balance doesn’t always mean your Amazon business is profitable. In fact, it’s one of the most common traps sellers fall into: you see cash in your account, assume you’re winning, then get hit with a surprise tax bill or an inventory reorder you can’t comfortably afford.

That’s why strong Amazon accounting and bookkeeping practices matter. When done correctly, they establish a clean set of books that are tax-ready, investor-attractive, and decision-friendly. This guide will break down the exact systems and workflows you need to run Amazon bookkeeping the right way, and what tools you can use to simplify the process.

The Foundation: Cash vs. Accrual Accounting

Before you touch any tools, you need to choose the right accounting method. This decision affects how your profits look on paper, how your taxes work, and how serious you appear to banks and potential buyers.

Why Cash Basis Can Mislead Amazon Sellers

Cash-basis accounting recognizes income when cash hits your bank account and recognizes expenses when cash leaves. That sounds simple, but it can distort reality for Amazon sellers because inventory-based businesses don’t behave in neat monthly cycles.

Here’s a classic example: let’s say you buy $20,000 of inventory in March, and that inventory arrives, gets prepped, and finally sells in June. On a cash basis, March looks unprofitable because of a big expense with no matching revenue. Meanwhile, June looks profitable due to a sales spike, with no inventory expense recorded.

But your business didn’t suddenly become better in June. You simply sold what you paid for months earlier.

This can lead to bad decisions like:

• Increasing PPC because you think margins are higher than they are
• Taking owner draws because the bank balance looks strong
• Reordering too late because March looked “too expensive”
• Misjudging true product profitability and scaling the wrong SKU

Cash basis is often fine for tiny service businesses. But for Amazon sellers, it’s a fast way to get confused.

The Benefits of Accrual Accounting

Accrual accounting records revenue when it’s earned and expenses when they’re incurred, regardless of when cash moves. For Amazon sellers, accrual is the gold standard because it matches how your business actually operates.

Accrual accounting fixes the “lumpy inventory” problem by applying inventory cost when the product sells, not when you pay for it. That means, using the example from earlier:

• March shows inventory as an asset (not an expense yet)
• June shows COGS when the revenue is recognized

Note that if you ever plan to do any of these things, you need accrual-based financials:

• Apply for a business loan
• Bring on investors
• Sell your Amazon brand
• Get valued based on EBITDA or SDE

Buyers and lenders want consistent, reliable reporting. They want to see real margins, inventory value, clean add-backs, and repeatable monthly performance, and accrual accounting makes your business look professional simply because it makes inventory and expense tracking easier.

Decoding the Amazon Settlement Statement

If you’ve ever looked at your Amazon payout and thought, “Why is it so much lower than my sales?” you’re not alone. Amazon settlement statements are the core “black box” of Amazon bookkeeping. Once you understand them, your accounting becomes easier.

Gross Sales vs. Net Deposits

Amazon can show you $50,000 in sales and deposit $31,000 into your bank account at the same time. This is not “missing money”; it’s Amazon taking fees, refunds, and adjustments before your payout.

Your settlement statement includes items like:

• Product sales
• Shipping income (if applicable)
• Promotional rebates
• Refunds and returns
• FBA fees
• Referral fees
• Storage fees
• Advertising charges (sometimes)
• Reimbursements
• Other adjustments

Remember:

Gross Sales = what customers paid (before deductions)
Net Deposit = what Amazon pays you after everything is netted out

If you only track deposits, your books will be wrong.

Identifying Key Fee Categories

To get clean books, you need to understand the major Amazon seller fees and how they impact profitability.

• FBA Fulfillment Fees: These are your pick/pack/ship fees. They vary by size tier, weight, category, and time of year. FBA fees are a major cost driver and should be tracked consistently.
• Referral Fees: This is Amazon’s “commission” for selling on the platform, typically a percentage of the sale price. These directly reduce your net revenue.
• Hidden Fees: Many sellers miss the smaller charges that quietly add up, such as monthly storage fees, aged inventory surcharges, return processing fees, and disposal/removal fees. These matter because they can surprise you when you check your margins.

The Reconciliation Workflow

Amazon pays out on a bi-weekly cycle (for most sellers), but your reporting should still be monthly. The solution is building a workflow that bridges payout timing and accounting periods.

A clean reconciliation workflow looks like this:

1. Pull Amazon settlement data for all payouts that occurred in the month
2. Record the settlement summary into your accounting software
3. Match the settlement totals to your bank deposits
4. Confirm that deposits + reserves align with settlement activity
5. Review exceptions (negative payouts, reserve holds, chargebacks)

This is why automation tools like A2X exist: manually recreating settlement activity line-by-line is a nightmare.

Mastering Cost of Goods Sold (COGS)

If you want to know whether your Amazon business is truly profitable, you must understand COGS. Most sellers underestimate it, misclassify it, or treat it like a guess. Let’s define and break down how COGS works:

Defining “Landed Cost”

COGS isn’t just what you paid for the unit. Your landed cost is the total cost to get the product ready to sell.

That includes:

• Unit cost from the supplier
• Freight (air, sea, rail, truck)
• Customs duties and import taxes
• Port fees and broker fees
• Drayage and delivery to warehouse/prep
• Prep center fees (labeling, polybagging, bundling)
• Inspection fees (if applicable)
• Packaging inserts (if included per unit)

If you ignore these, your margin calculations will look better than reality, which leads to overspending on PPC and scaling the wrong products.

Here’s a simple landed cost formula you can use:

Landed Cost per Unit = (Total landed shipment cost) ÷ (Units received into sellable inventory)

Inventory Valuation Methods

Once you track landed cost, you still need to decide how you value inventory over time, especially if costs change between shipments.

The two most common methods for Amazon sellers are FIFO and Average Costing. FIFO (First-In, First-Out) assumes the first inventory you purchased is the first inventory you sell.

This method is useful when:

• Costs are rising or falling significantly
• You want clean batch-based reporting
• You track inventory shipments precisely

FIFO can create more accurate profit reporting by matching older costs to earlier sales.

Average costing, on the other hand, blends your inventory costs together and uses an average cost per unit. This method is simpler and works well when:

• Your unit cost is stable
• You reorder frequently
• You don’t want batch-level complexity

Average costing reduces volatility but may hide changes in supplier pricing.

The Mathematical Formula for Profit

To verify margins and keep your reporting honest, always return to the core equation:

Gross Profit = Net Sales − COGS

Where:

• Net Sales = gross sales minus refunds, discounts, and allowances
• COGS = the landed cost of units sold during that period

This is the formula that tells you whether your product is healthy before you even consider PPC, software, payroll, or overhead. If gross profit is weak, the business can’t be fixed with “better ads.” It needs pricing, sourcing, or product strategy changes.

Managing Sales Tax and Marketplace Facilitator Laws

Sales tax is one of the most confusing parts of Amazon bookkeeping, mostly because Amazon collects tax in many states on your behalf. That’s good news operationally, but it creates accounting confusion if you record it incorrectly.

Who Actually Collects the Tax?

In most U.S. states, Amazon acts as a marketplace facilitator, meaning Amazon calculates the sales tax, collects it from the customer, then remits it to the state. As the seller, you often never touch that money. But the transaction can still appear in reports, which leads to a common mistake: accidentally counting sales tax as revenue.

Remember: sales tax is not your income. It’s a liability collected for the state. To record this without “double-counting” your revenue:

• Record product revenue as revenue
• Record sales tax collected as a liability (or exclude it entirely depending on your integration)
• Ensure Amazon’s remittance doesn’t hit your P&L as an expense

Your goal is that sales tax does not inflate revenue or distort profit.

Economic Nexus and Your Responsibilities

Even though Amazon handles sales tax in many places, you still need to understand nexus, which determines where you have Amazon seller tax obligations.

Nexus can be triggered by:

• Physical presence (warehouse, office, employees)
• Inventory stored in a state (including Amazon FBA inventory)
• Economic nexus (sales volume or transaction thresholds)

You should track where you have:

• Inventory stored (Amazon’s inventory placement can create multi-state exposure)
• Significant sales volume

The exact rules vary by state and change over time, so many sellers work with a sales tax specialist or software. The important point is: marketplace facilitator laws reduce your burden, but they don’t eliminate compliance risk.

The 5 Best Tools for Amazon Accounting & Bookkeeping

Amazon bookkeeping becomes dramatically easier when you stop trying to brute-force it with spreadsheets. The right tools help you reconcile settlements correctly, keep books clean, and create CPA-ready reporting.

1. CapForge

CapForge is ideal for sellers who want to outsource bookkeeping entirely while still getting Amazon-specific accuracy.

It’s especially valuable because it understands Amazon nuances like:

• Inventory tracking
• COGS accuracy
• Settlement reconciliation
• FBA reimbursement reconciliation

If you want “done-for-you” with fewer mistakes, this is a strong option.

2. QuickBooks Online

QuickBooks Online is the standard for:

• Professional reporting
• CPA compatibility
• Business lending documentation
• Long-term financial clarity

It integrates with many Amazon accounting tools and is widely supported by bookkeepers. If you plan to grow, QuickBooks is the most common foundation.

3. Xero

Xero is an excellent alternative, especially for:

• International sellers
• Multi-currency needs
• Cloud-first workflows
• Clean UI and reporting

Many e-commerce operators prefer Xero’s experience and flexibility.

4. A2X

A2X is often considered the gold standard for automating Amazon settlement reconciliation into QuickBooks or Xero. Instead of importing chaos, A2X helps you post clean summaries that match deposits and categorize fees properly. If you’re serious about accurate books at scale, A2X is a major unlock.

5. Link My Books

Link My Books is a streamlined alternative to A2X and is especially strong for:

• Automated tax jurisdiction mapping
• Clear settlement posting
• E-commerce-friendly workflows

If you want automation with simplicity, it’s a strong contender.

Tracking Non-Amazon Expenses

One of the biggest bookkeeping mistakes Amazon sellers make is focusing only on what Amazon reports. To understand your true profit, you must track everything.

Advertising Spend (PPC)

Amazon Advertising is often charged to:

• Credit cards
• Direct bank withdrawals
• Separate billing cycles

That means your settlement may not include all Amazon ad costs, and your P&L can be wrong if you only look at Amazon fees.

Best practices to keep this accurate include:

• Track PPC spend as its own expense category
• Separate it from Amazon selling fees
• Review TACoS and true contribution margin monthly

Operating Overhead

Overhead is where profits quietly disappear. Track recurring and operational costs like:

• Software subscriptions (Helium 10, Keepa, Sellerboard, etc.)
• VA salaries and agency fees
• Insurance (liability, product insurance)
• Product photography and creative
• Samples and R&D
• Office expenses
• Accounting and legal fees

The Monthly Bookkeeping Checklist

Monthly bookkeeping isn’t just “closing the books.” Bookkeeping creates a decision system that helps you answer questions like:

• Which SKU is truly profitable after fees and PPC?
• Can I afford my next inventory order?
• Am I scaling profit or scaling revenue?
• Why did margins drop this month?
• Is cash tight because of growth, or because of poor profit?

Here’s a monthly process you can use that keeps everything clean.

Step 1: Reconciliation of Settlements

Every month:

• Pull all Amazon settlements that occurred in the month
• Ensure each settlement is recorded in your accounting system
• Match settlement deposits to bank transactions
• Investigate discrepancies (reserve holds, negative payouts, chargebacks)

This is the step that prevents “mystery gaps” between Amazon reports and your bank.

Step 2: Inventory Counts and COGS Adjustments

Inventory errors destroy profit reporting. Monthly, you should:

• Confirm inventory purchases were entered correctly
• Ensure landed costs were included
• Reconcile received inventory vs. expected inventory
• Adjust for damaged, lost, or disposed units
• Review reimbursements

COGS accuracy is what separates real financials from fantasy numbers.

Step 3: Reviewing the P&L and Balance Sheet

Most sellers only glance at revenue. That’s not enough.

Every month, review your Profit & Loss (P&L) records and look at:

• Gross margin trends
• PPC as a % of revenue
• Net profit consistency
• Unexpected fee spikes
• Refund rates and return costs

Likewise, check your balance sheet and pay attention to your:

• Inventory asset value
• Cash position
• Credit card balances
• Loans payable
• Sales tax liabilities (if any)

A healthy Amazon business has strong financial structure, not just strong sales.

Conclusion

Amazon accounting and bookkeeping isn’t glamorous, but it’s one of the highest-leverage systems you can build. A strong bank balance can hide weak profit, and revenue can disguise operational problems for months until the business hits a wall.

When you build clean, accrual-based books and understand your settlement statements, you gain something most sellers never achieve: financial clarity. Try these tips out or implement the suggested bookkeeping tools into your workflow, so you’ll be tax-ready and more resilient when sales or costs change.