E-commerce VAT &
Marketplace Accounting Guide.
Selling through Shopify, Amazon, or Etsy creates unique accounting challenges. This guide covers payout reconciliation, cross-border VAT obligations, landed cost tracking, and the digital link requirements for MTD compliance.
Payout reconciliation
Every e-commerce business has the same problem: marketplaces do not deposit your sales revenue. They deposit a net payout, your gross sales minus referral fees, fulfilment fees, advertising costs, refunds, and currency adjustments.
Recording this net deposit as "sales" in your accounts produces incorrect figures. Your gross revenue is understated, your expenses are understated, and your VAT return is wrong. HMRC requires you to report gross sales figures, not net payouts.
The Solution: API Integration
Tools like A2X (for Amazon) and Link My Books (for Shopify, Amazon, eBay, and Etsy) connect directly to the marketplace API and unpack each payout into its component transactions. Every gross sale, every fee category, every refund, and every adjustment is posted to your accounting software as a separate, properly coded entry. This is the only reliable way to achieve accurate e-commerce accounts.
UK VAT Registration for Online Sellers
You must register for UK VAT if your taxable turnover exceeds £90,000 in any rolling 12-month period. For e-commerce sellers, taxable turnover is your gross sales value, not your net payout. This distinction catches many sellers who believe they are below threshold because their bank deposits appear modest.
You can also register voluntarily below the threshold. For businesses that import goods (paying import VAT), voluntary registration lets you reclaim that VAT, which can significantly improve cash flow if you have high import volumes.
Cross-Border VAT: OSS & IOSS
Post-Brexit, selling to EU consumers as a UK-based business requires careful VAT structuring. There are two key EU mechanisms:
One-Stop Shop (OSS)
For B2C sales of goods already within the EU (e.g., stored in EU fulfilment centres like Amazon FBA warehouses in Germany or Poland). OSS lets you file a single EU VAT return covering all 27 member states, instead of registering in each country individually.
Import One-Stop Shop (IOSS)
For B2C sales of goods shipped directly from the UK (or outside the EU) to EU consumers, where the consignment value is €150 or less. IOSS allows you to collect the EU VAT at the point of sale, so your customer avoids unexpected customs charges on delivery.
Amazon FBA & EU VAT
If you use Amazon FBA and Amazon stores your inventory in EU warehouses, you are making domestic EU sales from that country. This triggers local VAT registration obligations in each country where stock is held, unless you use the OSS. Many UK sellers are unknowingly non-compliant because Amazon moves inventory between EU warehouses without explicit seller consent.
Landed costs and true cost of goods sold
Your product's landed cost is everything it costs to get that item into your customer's hands. For an e-commerce seller importing from overseas, this includes:
- Manufacturing cost, the unit price from your supplier.
- Freight & shipping, sea freight, air freight, or courier costs.
- Customs duties & import VAT, payable when goods enter the UK or EU.
- 3PL warehousing, storage, pick-and-pack, and handling fees.
- Marketplace fees, referral fees, FBA fees, advertising costs.
Through management accounts, we track landed costs per product line so you can identify which SKUs are genuinely profitable after all costs are accounted for, and which are running below break-even.
MTD digital links
HMRC's Making Tax Digital rules require that no manual transcription or copy-pasting occurs in the chain from source data to your VAT return. For e-commerce sellers, this means you cannot download a Shopify CSV, manually type figures into a spreadsheet, and then file your VAT return from that spreadsheet.
The entire data flow, from marketplace sale to accounting software to VAT return, must be connected through digital links (APIs). We build this around Xero as the accounting record, with A2X or Link My Books as the marketplace connector, so the VAT return follows the same audit trail.
Scaling your business structure
Many e-commerce sellers begin as sole traders because it is simple. But as revenue grows, the tax efficiency of a limited company becomes compelling. A sole trader pays Income Tax and National Insurance on all profit; a company pays Corporation Tax at 19-25%, and the director extracts profits via the tax-efficient salary and dividend route.
The tipping point varies, but for most e-commerce businesses generating consistent profit above £30,000-40,000 per year, incorporation reduces the overall tax burden. Use our Incorporation Decision Tool to run the numbers for your situation.
How we handle marketplace accounting.
We set up A2X or Link My Books, configure your Xero chart of accounts for e-commerce, and deliver management accounts that show your true margins per channel and per product line.
Book an E-commerce ReviewRelated reading
Inventory & COGS Accounting for E-commerce
How e-commerce sellers record inventory and cost of goods sold, including opening stock, closing stock, landed costs and marketplace records.
Read the guide GuideMarketplace Fees and True Profit for Sellers
How marketplace fees, shipping, refunds, stock and VAT affect true profit for e-commerce sellers using Amazon, eBay or Shopify.
Read the guide GuideMulti-Channel Reconciliation for E-commerce
How to reconcile sales across Amazon, Shopify, eBay and payment processors so payouts, fees, refunds and VAT are recorded correctly.
Read the guideFrequently Asked Questions
Do I need to register for VAT if I sell on Amazon or Shopify?
You must register for UK VAT if your taxable turnover exceeds £90,000 in any rolling 12-month period. For marketplace sellers, your turnover is your gross sales value (before marketplace fees are deducted). Amazon and Shopify do not collect UK VAT on your behalf for domestic B2C sales, that responsibility remains with you as the seller.
What is the EU One-Stop Shop (OSS) and do I need it?
The OSS is an EU-wide VAT registration that lets you report and pay VAT on all your B2C sales to EU consumers through a single return, filed in one EU member state. Without it, you would need to register for VAT separately in every EU country where your sales exceed that country's distance selling threshold. If you sell to EU consumers post-Brexit, you almost certainly need either OSS or IOSS registration.
How do I reconcile Amazon net payouts with my actual sales?
Amazon deposits a single net payout that has already had referral fees, FBA fees, advertising costs, and refunds deducted. You cannot record this as your sales figure. Integration tools like A2X or Link My Books use the Amazon API to unpack each payout into its component transactions, gross sales, individual fees, refunds, and post them to your accounting software automatically.