Selling across eBay, Etsy, Amazon, Vinted, Depop and Shopify: trading vs personal sales, fees, platform reporting, VAT and MTD explained.
The defining feature of the modern online seller is that the business rarely lives on a single platform. A typical operation might list handmade goods on Etsy, clear overstock on eBay, run fulfilled-by-Amazon lines, shift fashion on Vinted and Depop, and drive its best margins through an own-brand Shopify store. Each platform has its own fee structure, its own payout schedule and its own report to HMRC, and that fragmentation is exactly where multi-channel sellers get into trouble at tax time. The mental model that fixes most of it is simple: HMRC does not tax platforms, it taxes you, and your tax return pulls every channel into a single set of figures.
This matters because almost every threshold in the system is applied to your combined total, not to any one platform. The GBP 1,000 trading allowance, the MTD mandation thresholds and the GBP 90,000 VAT threshold all look at the sum of your trading across every channel. A seller who is comfortably under each limit on each individual platform can still be well over it in aggregate, and that aggregate is what counts.
Before any threshold matters, settle the same question that governs all online selling: are you trading, or disposing of personal possessions? Selling your own used clothes on Vinted, an old phone on eBay, or unwanted homeware on Facebook Marketplace is not trading and is not taxable, however much it raises (subject only to the rare Capital Gains Tax charge on a single personal item selling for over GBP 6,000). Buying stock to resell, or making goods to sell, on any of these platforms is trading, and that income is taxable once it passes the allowance.
HMRC decides using the badges of trade: a profit motive, the frequency and organisation of sales, and whether you acquired or made the goods specifically to sell. The same person can be doing both at once, decluttering their own wardrobe on Vinted (not taxable) while running a sourced-stock reselling operation on eBay (taxable). Only the trading activity counts toward your thresholds.
Once your combined gross trading income exceeds GBP 1,000, you register for Self Assessment and pay tax on profit, which is total sales across all channels minus allowable expenses. Income Tax: nothing on the first GBP 12,570 (personal allowance), 20 per cent to GBP 50,270, 40 per cent to GBP 125,140, then 45 per cent. Class 4 NIC: 6 per cent on profit from GBP 12,570 to GBP 50,270, then 2 per cent. Class 2 NIC is collected through the return and protects your state pension. Scottish taxpayers (S-prefix codes such as S1257L) pay Income Tax under Scotland's own bands and Welsh taxpayers use C-prefix codes, but the trading rules, thresholds and NIC are identical UK-wide.
Many online sellers run their business alongside a job, so the profit stacks on top of employment income at their marginal rate. It is worth a quick check of your tax code to ensure HMRC has allocated your allowance sensibly, and the sole trader tax calculator will estimate the liability on your combined profit.
Since 1 January 2024, online marketplaces have been legally required to report seller data to HMRC under the OECD model reporting rules. eBay, Etsy, Amazon, Vinted, Depop, Airbnb and similar platforms each send HMRC an annual report in January covering the previous calendar year, for any seller exceeding 30 sales or roughly GBP 1,700 (around EUR 2,000) of proceeds on that platform.
The crucial point for multi-channel sellers is that the reporting threshold is applied per platform, but your tax obligation is applied to your combined total. You might fall below the reporting trigger on each individual platform yet still be a taxable trader because your aggregate sales are substantial. The reporting rule has not changed any tax; it has simply made HMRC far better at spotting sellers whose declared figures do not match the sum of their platform activity.
An expense is allowable if incurred wholly and exclusively for your selling business. These are the categories that matter most across channels.
| Expense | What counts | Notes |
|---|---|---|
| Cost of stock | What you pay for goods or materials to sell, across all channels | Usually the largest expense; keep purchase records |
| Platform and payment fees | eBay, Etsy, Amazon (including FBA and referral fees), Vinted, Depop, Shopify, PayPal, Stripe | Declare gross sales and claim fees rather than reporting the net payout |
| Postage and packaging | Royal Mail, couriers, fulfilment fees, boxes, mailers, labels | Fully deductible cost of dispatch |
| Home-working costs | A fair proportion of household running costs, or HMRC's simplified flat rate | Flat rate is usually simplest for home-based sellers |
| Software and subscriptions | Listing tools, inventory management, accounting software, design tools | Business proportion fully deductible |
| Mileage and travel | Trips to source stock, to fulfilment centres and the post office | 45p per mile for the first 10,000 miles, then 25p |
| Equipment | Label printers, scales, cameras, packing benches, computers | Larger items can go through the Annual Investment Allowance |
| Marketing | Platform-promoted listings, social ads, branding, product photography | Allowable |
| Professional fees and insurance | Accountancy, bookkeeping, product and public liability insurance | Fully deductible |
The biggest practical risk for an online seller is fragmented record-keeping: a payout figure here, a fee report there, a separate spreadsheet for each platform. Because tax is assessed on your combined position, you need one consolidated record of gross sales and fees from every channel. Pulling each platform's monthly statements into a single system, rather than juggling them at year-end, is what keeps the numbers reconcilable and your return defensible if HMRC compares it to the platform reports.
Most online sellers stay below the GBP 90,000 VAT registration threshold, but multi-channel sellers reach it faster than they expect because the test combines all channels. Exceed GBP 90,000 of combined taxable turnover in any rolling 12-month period and you must register within 30 days. Use the VAT calculator to model how registration would affect your prices and reclaims across your platforms.
Marketplaces account for VAT on their own fees, and Amazon, eBay and others handle VAT on many imported and facilitated sales under deemed-supplier rules. None of that removes your own gross sales from your VAT threshold calculation or from your Income Tax turnover. If you sell second-hand goods at scale, the VAT margin scheme may reduce the VAT due to your margin rather than the full price, which is worth exploring with an accountant before you register.
Take a sole trader selling across three channels in 2025/26: GBP 22,000 on Amazon, GBP 16,000 on eBay and GBP 8,000 through their own Shopify store, GBP 46,000 gross combined.
Combined gross sales: GBP 46,000
Allowable expenses:
Taxable profit: GBP 46,000 minus GBP 35,300 = GBP 10,700
Income Tax (assuming this is the only income, the GBP 12,570 allowance covers it, giving nil; if a job has used the allowance, GBP 10,700 at 20 per cent = GBP 2,140)
Class 4 NIC (if the allowance is free): nil, as profit is below GBP 12,570.
Note that no single channel reaches GBP 50,000, yet the combined GBP 46,000 is the figure that matters for VAT and MTD thresholds and would push this seller into MTD if it grew past GBP 50,000. The GBP 6,400 of platform fees and GBP 21,000 of stock are only deductible if every channel's gross sales are declared. Model your own combined position with the sole trader tax calculator.
Online selling tax has one golden rule: HMRC taxes the seller, not the platform. Add every channel together, declare the gross, and claim the fees. The aggregate is what counts.
Making Tax Digital for Income Tax Self Assessment (MTD for ITSA) replaces the annual return with four quarterly digital submissions and a final declaration. Mandation runs from April 2026 for combined gross income over GBP 50,000, April 2027 over GBP 30,000, and April 2028 over GBP 20,000, all measured on combined gross sales before fees. A multi-channel seller whose total crosses GBP 50,000, even with no single platform near that figure, is in the first wave.
For online sellers, MTD makes consolidated digital record-keeping essential rather than optional, because you must submit cumulative quarterly figures drawn from every channel. The quarterly planner helps you anticipate each submission and set aside the right amount of tax as the year progresses, so the final declaration in January holds no surprises. Building one consolidated system now, ahead of your mandation date, turns four deadlines a year into a routine export rather than a quarterly scramble across half a dozen platforms.
Treating each platform separately. Thresholds apply to your combined total; add every channel together.
Confusing personal sales with trading. Decluttering on Vinted is not taxable; sourced reselling on the same account is.
Reporting net payouts. Declare gross sales per channel and claim platform fees as expenses.
Losing track of stock and fees across channels. Fragmented records make your return hard to reconcile against the platform reports HMRC receives.
Forgetting payments on account. A first balancing bill over GBP 1,000 triggers advance payments toward next year, half each in January and July.
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