Amazon FBA Accounting UK: VAT, OSS & IOSS for Sellers (2026 Guide)

Amazon FBA accounting in the UK is several distinct problems pretending to be one: VAT registration thresholds that move in real time, EU storage that triggers foreign tax obligations without warning, settlement reports that don’t reconcile to bank deposits, and currency conversions that quietly distort your margins. Get any of it wrong and HMRC catches up two years later with interest and penalties. Here’s the playbook.

Why Amazon FBA accounting isn’t normal accounting

A high street retailer takes a card payment, banks the deposit, and the bookkeeping is a one-line entry. Amazon doesn’t work like that. A typical UK Amazon FBA seller deals with:

• 3–6 different Amazon marketplaces (UK, DE, FR, IT, ES, NL, sometimes US/CA).
• Bi-weekly or fortnightly disbursements that bundle thousands of micro-transactions.
• FBA fees, referral fees, advertising charges, and storage fees deducted before payout.
• Reserves (cash held back for refund risk) that move on a rolling basis.
• Returns and refunds that span tax periods.
• Inventory stored in foreign warehouses you didn’t choose.

The result: your “sales revenue” in Amazon’s seller dashboard, your bank deposit, your invoice records, and your VAT-relevant turnover are four different numbers. Reconciling them is the core skill of Amazon-specialist accounting.

UK VAT for Amazon sellers

When you must register

You must register for UK VAT if your taxable UK turnover (per HMRC’s rolling 12-month rule) exceeds £90,000 in the past 12 months, or you expect it to exceed £90,000 in the next 30 days. The threshold is calculated on rolling 12 months — not your accounting year — and Amazon sellers tend to cross it abruptly during peak season.

For non-UK established sellers selling into the UK, the threshold is £0 — you must register before your first UK sale. Amazon enforces this aggressively and will suspend accounts that lack a valid UK VAT number where required.

When Amazon collects VAT for you

Since the Brexit changes of January 2021, Amazon is the “deemed supplier” for VAT purposes in two scenarios:

• Goods sold to UK customers from non-UK established sellers (regardless of order value).
• Goods imported into the UK with a value of £135 or less, sold by any seller via Amazon.

In these cases, Amazon collects and remits the VAT directly to HMRC. As the seller, you receive the net amount and you don’t account for that VAT on your own return — but you still need to record the gross transaction correctly. Get the categorisation wrong and your VAT return double-counts (or under-counts) badly.

Which VAT scheme is best for FBA sellers?

Three viable options for UK Amazon sellers:

• Standard VAT — what most growing sellers end up on. Charge 20% on UK sales, reclaim on inputs, file quarterly.
• Flat Rate Scheme (FRS) — pay a flat percentage of gross turnover (typically 7.5% for retail). Simpler but worse for businesses with high input VAT (which most Amazon sellers have).
• Cash Accounting — only account for VAT when money actually moves. Helpful for cash flow if you have late-paying B2B customers, less relevant for FBA.

Most FBA sellers above £230,000 turnover are forced off FRS regardless. We typically recommend Standard VAT plus solid bookkeeping software from day one.

OSS, IOSS, and selling into the EU

One Stop Shop (OSS)

If you sell goods to EU consumers (B2C) above €10,000 across all EU countries combined per year, you must charge the local VAT rate of the destination country. The One Stop Shop (OSS) scheme lets you register and report all that EU VAT through a single registration in one EU member state, instead of registering in every country you sell to.

Since Brexit, UK businesses must use the Non-Union OSS via an EU member state. Many UK Amazon sellers register through Ireland or Germany. European Commission’s OSS guidance is the canonical reference.

Import One Stop Shop (IOSS)

For goods sold to EU consumers with a consignment value of €150 or less, imported from outside the EU (i.e., shipped from the UK), the IOSS scheme lets you charge EU VAT at the point of sale and remit it via a single monthly return. Without IOSS, your customers pay VAT on import — which kills your conversion rate and creates customer service nightmares.

If you’re using Amazon’s Pan-EU FBA programme, IOSS is partly handled by Amazon for low-value imports — but you still need separate compliance for goods over €150 and any direct shipments outside Amazon’s logistics.

Distance selling thresholds — a quick history

Pre-July 2021, each EU country had its own distance-selling threshold (typically €35,000 or €100,000). Since 1 July 2021, those are gone — replaced by the single €10,000 EU-wide threshold and OSS scheme. If you’ve got pre-2021 records still in distance-selling format, they need to be re-categorised.

The biggest gotcha: Amazon stores your inventory abroad without telling you

This is where most Amazon sellers — and most generalist accountants — get caught out. If you opt into Pan-EU FBA (or even just European Fulfilment Network), Amazon decides where to store your inventory based on demand patterns. Your stock can be sitting in a warehouse in Germany, France, Poland, the Czech Republic, Spain, or Italy at any given moment.

The tax consequence: storing inventory in an EU country creates a VAT registration obligation in that country, regardless of whether you’ve made a single sale to a customer there. The threshold is zero, the timeline is “before you store”, and the penalties for backdating run into thousands per country.

What this means in practice for a Pan-EU seller:

• Up to 7 separate VAT registrations (UK + 6 EU FBA countries: DE, FR, IT, ES, PL, CZ).
• Each requires a local accountant or VAT agent.
• Each files monthly or quarterly returns.
• Total ongoing compliance cost: £2,000–£8,000/year on top of UK accounting.

The Pan-EU programme is genuinely worth it for high-volume sellers (lower fulfilment fees, faster Prime delivery across Europe), but the tax overhead has to be priced in. A surprising number of sellers we onboard had no idea they were liable in 4 EU countries until we ran the numbers.

Reconciling Amazon settlement reports

Every fortnight, Amazon deposits a single net figure into your bank account. That figure is the result of:

• Gross sales (every order in the period)
• − Refunds (current period, plus some that span periods)
• − FBA fees (per-unit fulfilment + storage)
• − Referral fees (Amazon’s commission, typically 8–15%)
• − Advertising spend (PPC charges run separately by some sellers)
• − Reserves (held back for refund risk)
• − Other adjustments (chargebacks, FBA losses, removal fees)

For VAT and accounts, you need the gross revenue figure with each fee categorised separately as an expense. Three approaches:

1. Manual import of settlement reports — works for low volume, breaks above 50 orders/month.
2. A2X or LinkMyBooks — purpose-built integrations between Amazon and Xero/QuickBooks. Industry standard for serious sellers; £20–£60/month.
3. Direct Xero/QuickBooks Amazon integration — getting better but still less complete than A2X.

If your accountant is manually transcribing Amazon settlements into a spreadsheet, you’re paying for hours and getting errors. A2X-grade automation should be standard.

Multi-currency accounting

If you sell on Amazon DE/FR/IT/ES, you receive payouts in EUR. On amazon.com, USD. On amazon.ca, CAD. Three options:

• Convert each payout to GBP at Amazon’s exchange rate. Simple but you’re paying Amazon’s FX margin (usually 2–3% above mid-market).
• Use a multi-currency account (Wise Business, Revolut Business) and have Amazon pay in native currency. Convert when rates suit you.
• Run multi-currency books in Xero or QuickBooks. Your statutory accounts still need to be in GBP, but you record transactions in original currency and account properly for FX gains/losses at year-end.

For most growing sellers, option 2 + multi-currency books is the right answer — it saves several thousand pounds a year on FX and gives you proper financial visibility.

Common mistakes UK Amazon sellers make

1. Treating the bank deposit as turnover. Your VAT-relevant turnover is gross sales, not net payout — and getting this wrong understates VAT and Corporation Tax.
2. Missing Pan-EU VAT obligations. By far the biggest issue we see at onboarding.
3. Not tracking Amazon advertising spend properly. PPC is a deductible expense; many sellers miss it because it bills outside settlements.
4. Mixing personal and business Amazon accounts. Even one personal purchase on a business card creates reconciliation chaos.
5. Forgetting about IOSS for sub-€150 EU shipments. Without it, your EU customers pay VAT on import and complain.
6. Letting refunds drift. Refunds in the next quarter need to be accounted for in the original VAT period if material.
7. No proper inventory accounting. Cost of goods sold should match what was actually shipped, not what you bought from suppliers.

Frequently asked questions

Do I need a UK accountant if I sell only on Amazon US?

If you’re a UK-resident company or individual, yes — your worldwide income is taxable in the UK. Amazon US sales are part of your UK Corporation Tax or Self Assessment regardless of where they’re earned. You may also need US sales tax registrations (a different beast — handled via TaxJar, Avalara, or specialist US accountants).

Do I have to register in every EU country I store in?

Yes, if you’re using FBA and Amazon stores inventory there. Amazon will tell you which countries you’re storing in via the Inventory Health report; cross-reference against your VAT registrations and act on any gaps quickly.

What’s the best accounting software for UK Amazon FBA?

Xero or QuickBooks Online, plus A2X (or LinkMyBooks) as the Amazon-to-accounting connector. We use this stack for the majority of our FBA clients. Sage doesn’t have the same level of integration; FreeAgent is too basic for multi-marketplace sellers.

How much does Amazon FBA accounting cost in the UK?

For a single-marketplace UK seller under £250k turnover, expect £180–£300/month for full compliance plus monthly bookkeeping with A2X. For Pan-EU sellers with multiple VAT registrations, £400–£800/month is realistic. See our pricing for what’s included at each tier.

Can I switch accountants if my current one isn’t handling Amazon properly?

Absolutely. Switching mid-year is fine — your new accountant handles the disengagement and clearance process. We’ll typically pick up settlement reconciliation from the start of your current accounting year and re-categorise prior periods if needed. Read our guide to switching accountants for the full process.

The bottom line

Amazon FBA accounting rewards specialist knowledge more than almost any other niche in UK tax. The compliance burden is real but predictable; the operational savings from doing it well are significant. Pick a software stack early (Xero + A2X is our usual answer), get your VAT registrations in order from day one, and reconcile settlements monthly so issues surface fast.

If you’re growing fast and feel like the books are slipping behind, that’s the moment to bring in a specialist — not 12 months later. Talk to us or see who we work with if you want to know whether we’re the right fit for your stage.