Selling on Amazon in the UK looks simple from the outside — list a product, ship it into FBA, and let Amazon handle the rest. But once the sales start flowing, most sellers quickly discover that the accounting behind an Amazon FBA business is anything but simple. VAT thresholds, marketplace facilitator rules, fees deducted before payout, refunds, inventory sitting in Amazon warehouses, and monthly settlement reports that don’t look like anything a normal accountant has seen before.

The wrong accountant will treat you like a regular sole trader or limited company and miss the things that actually move your tax bill. The right one — an Amazon FBA accountant who understands e-commerce — will keep you compliant, protect your margins, and give you the numbers you need to grow.

This guide explains what an Amazon FBA accountant in the UK actually does, the biggest tax and bookkeeping issues Amazon sellers face, and how to pick the right one for your business.

1. Why Amazon FBA Sellers Need a Specialist Accountant

Amazon FBA is not a normal retail business, and it’s not a normal service business either. Your money doesn’t arrive as clean invoices — it arrives every two weeks as a lump-sum settlement from Amazon, already netted off against dozens of different fee types. Miss what’s inside that settlement and you either overpay tax or, worse, understate your income to HMRC.

What Makes FBA Accounting Different

• Amazon deducts referral fees, FBA fulfilment fees, storage fees, long-term storage surcharges, advertising (PPC) spend, refunds and reimbursements before you ever see the money
• Stock sits in Amazon warehouses across the UK (and often the EU) — that stock is an asset on your balance sheet, not an expense until it sells
• You’re paid in multiple currencies if you sell on international marketplaces, so FX gains and losses hit your P&L
• Marketplace VAT rules mean Amazon sometimes collects and pays VAT for you, and sometimes doesn’t — getting this wrong is one of the most common (and expensive) FBA mistakes

A generalist accountant who books your Amazon payout as one line of “sales income” will make you pay tax on money that was never really yours, and will miss legitimate deductions worth thousands.

Recommended action: Before you hit £30k–£50k in annual sales, get an accountant who has other Amazon FBA clients on their books and understands settlement-level reporting.

2. VAT: The Biggest Trap for UK Amazon Sellers

VAT is where most FBA sellers get into trouble. The rules changed significantly after Brexit and again with the introduction of the EU’s One Stop Shop (OSS) and Import One Stop Shop (IOSS) schemes. If you’re selling in the UK and Europe, you need to know exactly where you stand.

UK VAT Registration for FBA Sellers

If you’re a UK-established business, you must register for UK VAT once your taxable turnover exceeds the current £90,000 threshold in any rolling 12-month period. If you’re a non-UK business storing stock in the UK (including in an Amazon FBA warehouse), you must register for UK VAT from your very first sale — there is no threshold.

Marketplace Facilitator Rules

Since 1 January 2021, Amazon is required to collect and remit UK VAT on certain sales — mainly goods sold by overseas sellers to UK customers, and goods sold to UK customers where the consignment value is £135 or less. For a UK-established VAT-registered seller, however, you are still responsible for accounting for VAT on your own sales through your VAT return. Confusing these two situations is one of the most common errors we see.

Selling into the EU: OSS, IOSS and Country Registrations

• If you store stock in an EU country (for example under Pan-EU FBA), you almost always need a local VAT registration in that country
• Distance sales from one EU country to consumers in another are covered by the One Stop Shop (OSS) scheme once you exceed the €10,000 EU-wide threshold
• Low-value imports into the EU (up to €150) can be handled through IOSS, which speeds up customs and improves the customer experience

Making Tax Digital for VAT

All VAT-registered businesses in the UK must comply with Making Tax Digital — that means keeping digital records and filing VAT returns through compatible software such as Xero or QuickBooks. Manual spreadsheets uploaded through the old HMRC portal are no longer allowed.

Recommended action: Do a full VAT health-check before your next return. Confirm which of your sales Amazon collects VAT on, which you’re responsible for, and whether you have any EU stock movements that trigger a foreign VAT registration.

3. Bookkeeping and Profit Tracking: Making Sense of Amazon Settlements

Ask most Amazon sellers what their real net margin is per product and they don’t know. That’s not carelessness — it’s because Amazon’s own reports don’t give you a clean profit picture. A good Amazon FBA accountant fixes this by building bookkeeping around your actual settlement data, not your bank feed.

Why Your Bank Feed Isn’t Enough

Your bank shows the net payout Amazon sends you every two weeks. Behind that single number sit thousands of transactions: sales, refunds, FBA fees, storage fees, PPC spend, promotional rebates, chargebacks and reimbursements. If your bookkeeping stops at the bank feed, you have no visibility of gross sales, no visibility of true fees, and no accurate cost of goods sold.

The Right Tech Stack for an Amazon FBA Business

• Cloud accounting: Xero or QuickBooks Online as your core ledger
• Amazon integration tool: A2X or Link My Books to break Amazon settlements down into the correct sales, fee and refund accounts, and to post clean summary journals into your ledger
• Inventory tracking: Software that values stock at cost so your balance sheet and cost of goods sold are accurate
• PPC and advertising reports: Reviewed monthly against sales, not just left inside Seller Central

Cost of Goods Sold and Inventory

Because you often buy stock months before it sells, your cost of goods sold has to be matched to the period the sales actually happened in — not the period you paid the supplier. Getting this right can shift your reported profit (and your tax bill) meaningfully in either direction. Under HMRC rules you’ll normally use the accruals basis for a limited company, and either cash basis or accruals basis as a sole trader depending on turnover and business type.

Recommended action: If you’re still working from Amazon’s Business Reports and your bank statements, switch to a proper cloud accounting + A2X/Link My Books setup. You’ll spend less time in spreadsheets and finally see your true margin per SKU.

4. Choosing the Right Amazon FBA Accountant in the UK

Not every accountant advertising “e-commerce” experience actually knows Amazon. Before you sign an engagement letter, ask these questions.

Questions to Ask Before You Hire

• How many active Amazon FBA clients do you currently work with?
• Do you use A2X or Link My Books as standard for FBA bookkeeping?
• How do you handle VAT on marketplace-facilitated sales versus my own sales?
• Can you support Pan-EU FBA and foreign VAT registrations (or refer me to someone who can)?
• How will you help me plan for corporation tax or Self Assessment as my profits grow?
• What’s included in your monthly fee, and what’s charged extra?

Red Flags to Watch For

• Quoting a fee before even asking about your marketplaces or turnover
• Wanting to bookkeep straight from your bank feed with no Amazon integration
• Vague answers on marketplace VAT and EU compliance
• No experience with cloud accounting software like Xero or QuickBooks

Recommended action: Shortlist two or three accountants, ask the questions above, and pick the one whose answers show real Amazon-specific experience — not just general small business knowledge.

Final Thoughts

An Amazon FBA business can be incredibly profitable, but only if your numbers are clean. VAT set up correctly. Settlements broken down properly. True cost of goods and true margin visible every month. Get those foundations right and you’ll make better sourcing decisions, price with confidence, and never be blindsided by a tax bill in January or a VAT bill in the middle of Q4.

If you’d like an Amazon FBA accountant who genuinely understands e-commerce — from settlement-level bookkeeping to UK VAT, marketplace rules and international expansion — our e-commerce accounting specialists in Blackburn work with sellers across the UK.

Use this link to book a free, no-obligation meeting.

Frequently Asked Questions

Do Amazon FBA sellers need to register for VAT?

You must register once UK taxable turnover exceeds £90,000, or immediately if you are a non-UK seller storing stock in the UK. Amazon may also require VAT registration for its own marketplace compliance checks.

What are OSS and IOSS for FBA sellers?

OSS (One Stop Shop) lets you file a single EU-wide VAT return for cross-border B2C sales inside the EU; IOSS (Import One Stop Shop) covers imports up to €150 into the EU. Both simplify EU VAT for sellers using Amazon’s Pan-European FBA.

How is Amazon FBA income taxed in the UK?

A UK limited company pays Corporation Tax (19–25%) on trading profits; a sole trader pays Income Tax and Class 4 NI. Marketplace fees, FBA fees, cost of goods, shipping, software subscriptions and accountancy are all allowable expenses.

What accounting software works best for Amazon FBA?

Xero or QuickBooks paired with an ecommerce connector (A2X, Link My Books or Taxomate) pulls settlement data from Amazon and posts it correctly — critical for accurate VAT, revenue recognition and profitability by SKU.