When selling on Etsy, eBay and Amazon in the UK you must pay income tax or corporation tax on your profits, and you may need to register for VAT depending on your turnover and the goods you sell. Platform fees are not tax but they reduce your margins and must be recorded accurately in your bookkeeping.
This guide explains the main principles, how marketplaces handle VAT on sales, the role of self-billing invoices, and practical steps to stay organised so you can focus on growing your e-commerce business without unexpected HMRC issues.
Understanding Your Tax Responsibilities as a UK Online Seller
As a UK seller on major marketplaces you are responsible for declaring your trading income to HMRC. If you operate as a sole trader you report profits through self assessment. If you trade through a limited company you pay corporation tax on company profits and may also pay income tax on any salary or dividends you take.
Tax rules, thresholds and rates change regularly. Always check the latest guidance on GOV.UK and consult HMRC or a qualified accountant for your specific situation. Keep clear records of all sales, fees, refunds and expenses so you can calculate your true profit accurately.
Platform Fees and Their Impact on Your Margins
Etsy, eBay and Amazon each charge listing fees, final value fees, subscription fees or fulfilment charges. These are operating costs, not taxes, but they directly reduce the amount of profit you pay tax on. Record every fee in your bookkeeping system so your accounts show the real cost of selling on each platform.
Fees vary by category, sales volume and whether you use additional services such as promoted listings or fulfilment by the platform. Review the current terms on each marketplace’s seller hub regularly because they can change. Factor these costs into your pricing from the start to protect your margins.
Practical tip: Create a simple spreadsheet column for each platform’s fees and import your monthly statements. This makes it easier to separate fees from sales revenue when you prepare your self assessment or company accounts.
VAT on Marketplace Sales – How It Works
Value Added Tax (VAT) may apply to your UK sales and to sales into the EU or other countries. Marketplaces often collect and remit VAT on your behalf for certain transactions, but you remain responsible for understanding when VAT registration is required and for filing correct returns.
When your taxable turnover reaches certain levels you must register for VAT. Once registered you usually charge VAT on your selling price (subject to the rules for each product category) and can reclaim VAT on qualifying business purchases. Marketplaces provide reports to help you reconcile VAT charged and collected.
Check GOV.UK for current VAT registration thresholds, distance-selling rules and the VAT treatment of different product types. Rules for overseas sales and low-value imports have changed in recent years, so confirm the latest requirements before scaling internationally.
Self-Billing Invoices from Marketplaces
Amazon, eBay and Etsy often issue self-billing invoices or credit notes for the fees they charge you. These documents show the amount the platform has deducted from your sales and are treated as valid VAT invoices in most cases. Keep every self-billing document in your records because HMRC may ask to see them during a review.
When you receive a self-billing invoice you do not issue your own invoice to the platform. Instead you use the marketplace document to support your VAT reclaim on those fees (if you are VAT-registered). Make sure the self-billing invoice contains all the information required by HMRC, such as the platform’s VAT number, a clear description of the services and the correct VAT rate.
Practical step: Set up a dedicated email folder or cloud storage location for marketplace statements and self-billing documents. Reconcile them monthly against your bank deposits so your bookkeeping stays accurate and you avoid discrepancies at year end.
Bookkeeping and Record-Keeping Essentials
Good records are the foundation of accurate tax returns. Track every marketplace payout, fee, refund, advertising cost and product expense. Many sellers use cloud accounting software that connects directly to Etsy, eBay and Amazon so sales data is imported automatically.
Separate personal and business transactions. If you sell from home, you may be able to claim a proportion of household costs, but you must use a reasonable method and keep supporting calculations. Digital records are acceptable provided they are accurate, complete and accessible.
Retain records for at least six years. This includes platform reports, self-billing invoices, bank statements and evidence of expenses. Organised records make it much easier to complete your self assessment on time and reduce the risk of penalties.
Cash Flow, Pricing and Margin Calculations
Marketplace fees and VAT affect how much cash actually reaches your bank account. When setting prices, work backwards from the price the customer pays: deduct platform fees, VAT (if applicable), cost of goods, shipping and advertising to arrive at your net margin. This helps you decide whether a product is worth selling at scale.
Monitor cash flow weekly in the early stages. Payout schedules differ between platforms and delays can affect your ability to pay suppliers. Build a simple cash-flow forecast that includes expected sales, known fees and upcoming tax liabilities such as VAT payments or self-assessment deadlines.
Review your margins every quarter. If fees or advertising costs rise, adjust prices or find more efficient fulfilment methods rather than simply increasing sales volume of low-margin items.
Getting Help and Staying Compliant
HMRC provides free webinars, online tools and helplines for new businesses. Use the GOV.UK self-assessment and VAT sections to understand deadlines and filing requirements. Consider speaking to an accountant who understands e-commerce before your turnover grows significantly.
Loomworks in West Yorkshire offers selected early-stage founders free desks, a registered address and mentoring with no fees or equity taken. Such support can free up time to focus on the financial side of your business.
Stay up to date by checking the seller dashboards on Etsy, eBay and Amazon regularly and subscribing to their official newsletters. Accurate bookkeeping, prompt filing and honest declarations remain the best way to avoid problems with HMRC.
Frequently asked questions
Do I need to register for VAT if I only sell on Etsy and eBay?
You must register for VAT once your taxable turnover exceeds the current threshold set by HMRC. This includes sales made through all channels. Marketplaces may handle VAT collection on some sales, but you are still responsible for checking whether registration is required and for filing returns on time. Check GOV.UK for the latest threshold and rules.
What are self-billing invoices from Amazon and eBay?
Self-billing invoices are documents the platforms issue to show the fees and charges they have deducted from your sales. They act as valid VAT invoices for reclaiming VAT on those fees when you are VAT-registered. Keep them safely and reconcile them with your bank statements each month.
Can I claim back VAT on marketplace fees?
If you are registered for VAT you can normally reclaim the VAT charged on platform fees, provided the self-billing invoice meets HMRC requirements. Record the invoices correctly in your accounting software and only claim VAT on business use. Always retain the original documents in case of an HMRC enquiry.
How do I record platform fees in my bookkeeping?
Treat platform fees as a deductible business expense. Import your monthly statements into your accounting system and allocate the fees to the correct sales channel. This reduces your taxable profit. Keep a clear audit trail linking each fee to the related sales so your records are easy to explain if needed.
When do I pay tax on my Etsy, eBay and Amazon profits?
Sole traders pay income tax and Class 2 and Class 4 National Insurance through self assessment by 31 January following the tax year. Limited companies pay corporation tax nine months after their accounting year end. Make quarterly payments on account if your tax bill is likely to be high. Check current deadlines and methods on GOV.UK.
Related reading: How to prepare a cash flow statement for investors or loans, Can my startup claim the employment allowance on National Insurance?, How to read and understand your profit and loss report. Browse all tax & finance guides or apply to Loomworks.