Vinted, Etsy, eBay and Amazon: UK Tax Guide for Online Sellers 2026/27

Trade vs Casual Selling -- When Online Selling Becomes Taxable

Not every sale you make online is a taxable event. HMRC distinguishes between two categories of seller:

• Casual or one-off sellers -- people clearing out their own possessions. Selling your old wardrobe on Vinted, offloading unused furniture on eBay, or selling a bicycle you no longer ride is generally not a trade. You are simply realising assets you already owned. HMRC does not generally tax these transactions as trading income, and because you are selling personal items usually at below their original purchase price, there is no capital gains tax either.
• Traders -- people who buy goods to resell, manufacture or create items for sale, or operate in a regular, organised, profit-motivated way. This is a trade, and the profits are fully taxable.

The legal boundary between the two is drawn using the badges of trade -- a set of indicators developed through case law and set out in HMRC's Business Income Manual. No single badge is conclusive, but the more that apply, the more likely HMRC will treat your activity as a trade:

• Profit motive: did you set out to make a profit?
• Frequency and repetition: selling 200 items per year looks far more like a trade than selling 3 items.
• Nature of the asset: buying and reselling clothing, electronics or collectibles is more trade-like than selling a car you owned for years.
• Modifications before sale: cleaning, repairing, repackaging or photographing goods before sale suggests a trading operation.
• Supplementary work: time spent sourcing, listing, packing and managing stock is evidence of a business.
• Financing: if you borrowed money to buy stock, that points toward trade.
• Organisation and system: a dedicated workspace, stock management, business bank account and accounting records all suggest a trade.

If HMRC decides you are running a trade, all profits -- from the very first sale -- become taxable, even if you did not realise it at the time. This is why understanding your position early is important.

The GBP 1,000 Trading Allowance -- Full Rules

The trading allowance, introduced in April 2017, gives every individual a GBP 1,000 annual exemption from income tax on gross trading income. It is one of the most useful simplifications in the UK tax code for small-scale sellers.

Note the critical rule: you cannot combine both options. If you elect the GBP 1,000 trading allowance, you forfeit the right to deduct any actual expenses for that tax year. The allowance is only worth claiming if your deductible costs are less than GBP 1,000. If you spent GBP 1,500 on stock, fees and postage, opting out and claiming actual expenses will give you a larger deduction.

The allowance also applies to miscellaneous income such as odd-job earnings and babysitting, but it does not apply to rental income (which has a separate GBP 1,000 property allowance) or employment income. If you have both trading income and rental income, each allowance operates independently.

DAC7 -- Platform Reporting to HMRC from 2024

DAC7 (EU Directive on Administrative Cooperation, 7th revision) was transposed into UK law via The Platform Operators (Due Diligence and Reporting) Regulations 2023, effective from 1 January 2024. Under these rules, digital platforms that facilitate the sale of goods and services are required to:

1. Collect and verify the identity of every seller on their platform (name, address, date of birth, National Insurance number or Tax Identification Number).
2. Record and total the gross payments made to each seller, the number of transactions, and any fees, commissions and taxes withheld.
3. Report this information to HMRC annually -- for each calendar year -- by 31 January the following year.
4. Provide a copy of the report to each seller.

Platforms in scope include eBay, Etsy, Amazon Marketplace, Vinted, Airbnb, Fiverr, TaskRabbit, ASOS Marketplace and any other platform where sellers earn income from third-party buyers. Platforms with fewer than 25 sellers or whose sellers each earn below EUR 2,000 and complete fewer than 30 transactions per year may be exempt from reporting -- but most mainstream marketplace sellers will be within scope.

Self Assessment -- When to Register and Filing Deadlines

Once your gross trading income from online selling exceeds GBP 1,000 in a tax year, you need to register for Self Assessment and file an annual tax return. The key dates for the 2026/27 tax year (6 April 2026 to 5 April 2027) are:

• Registration deadline: 5 October 2027 -- register online at GOV.UK if you have not done so before.
• Paper return deadline: 31 October 2027.
• Online return deadline: 31 January 2028.
• Tax payment deadline: 31 January 2028 (balancing payment plus first payment on account for 2027/28).
• Second payment on account: 31 July 2028.

Payments on account are required once your Self Assessment tax bill exceeds GBP 1,000. HMRC automatically splits the estimated following year's liability into two equal instalments due in January and July. This can catch new sellers off-guard in their second year, when they face both the prior year's balancing payment and the first payment on account simultaneously.

Late filing penalty: GBP 100 automatic penalty if the return is filed even one day late, escalating to daily penalties of GBP 10 for up to 90 days after 3 months, then further percentage penalties at 6 and 12 months. HMRC has no discretion to waive these penalties without a reasonable excuse.

Allowable Deductions for Online Marketplace Sellers

If you opt out of the trading allowance and claim actual expenses, you can deduct costs that are incurred wholly and exclusively for the purposes of your trade. Common allowable deductions for marketplace sellers include:

Capital items (computers, cameras, shelving) used in the business are not deductible in full as a revenue expense in the year of purchase -- they are instead claimed as capital allowances. The Annual Investment Allowance (AIA) lets most sole traders claim 100% of the cost of qualifying plant and machinery in the year of purchase, up to a generous limit, which covers virtually all equipment a typical online seller would buy.

VAT Threshold -- GBP 90,000 and What It Means for Sellers

VAT registration becomes compulsory once your VAT-taxable turnover (gross sales of goods or services that are not exempt from VAT) exceeds GBP 90,000 in any rolling 12-month period. For most physical goods sold on Etsy, eBay or Amazon, VAT at the standard rate of 20% applies.

Once you hit the GBP 90,000 threshold you must register within 30 days and begin charging VAT from the date you were required to be registered. Failure to register on time results in a penalty -- HMRC charges a percentage of the VAT due from the date you should have registered.

Marketplace VAT rules: for many cross-border sales, online platforms act as the "deemed supplier" for VAT purposes and collect and remit VAT on the seller's behalf. For example:

• Amazon collects and remits UK VAT on sales to UK customers by non-UK sellers and, in some cases, UK sellers using Fulfilment by Amazon (FBA) with goods stored in UK warehouses.
• eBay collects VAT on sales to UK consumers by overseas sellers on goods valued up to GBP 135.
• Etsy collects VAT on UK sales to buyers where the seller is based outside the UK.

UK-based sellers who sell exclusively to UK buyers through platforms that do not operate as deemed suppliers must account for VAT themselves once registered. Once registered, you must use Making Tax Digital (MTD) for VATcompatible software and submit returns digitally every quarter.

HMRC Connect -- How HMRC Matches Platform Data to Tax Returns

HMRC Connect is an internal data analytics and risk profiling system that integrates data from over 30 external sources. For online marketplace sellers, the most important feed is the annual DAC7 report from platforms. Connect automatically matches this to what sellers have declared:

• If you earned GBP 18,000 on Etsy in 2025/26 but filed no Self Assessment return, Connect flags this as a potential non-filer case.
• If you declared GBP 5,000 of online income but the platform reported GBP 15,000, the discrepancy triggers a risk score increase.
• If you have no Self Assessment record at all but a platform reports substantial income, Connect can trigger automatic "nudge letters" from HMRC prompting you to register.

HMRC has been explicit in its communications that it is using DAC7 data to identify non-compliant marketplace sellers. The Voluntary Disclosure facility allows taxpayers to correct past errors before HMRC opens a formal enquiry. Unprompted voluntary disclosure of a careless error typically results in a 0% penalty (you pay the tax and interest only). Prompted disclosure after HMRC contact results in penalties of 15-30% of the unpaid tax. Deliberate concealment can attract penalties of up to 100% plus potential criminal prosecution.

Sole Trader vs Limited Company for Online Sellers

When your online marketplace business grows beyond a hobby, you face a structural decision: remain a sole trader or incorporate as a private limited company.

Sole trader is the default for most small sellers. It is simple: you register for Self Assessment, declare your trading profit, and pay income tax and NI through your annual tax return. There is no Companies House filing, no separate business bank account required in law, and no payroll unless you employ staff. The disadvantage is that all profits are taxed at your personal income tax rate -- 20% at basic rate, 40% at higher rate -- plus Class 4 NI at 9% on profits between GBP 12,570 and GBP 50,270.

Limited company becomes more tax-efficient once profits consistently exceed approximately GBP 30,000-40,000 per year. A company pays Corporation Tax at 19% on profits up to GBP 50,000 (the "small profits rate"), and you extract money via a combination of salary (up to the Secondary Threshold of GBP 5,000 to minimise employer NI) and dividends. Dividends above the GBP 500 allowance are taxed at 10.75% (basic rate taxpayer) -- substantially less than the 29-31% combined income tax and NI on equivalent sole trader profit.

Key Action Points for Online Marketplace Sellers

Whether you are just starting to sell or have been trading for years without declaring income, here is what to do:

1. Review your gross income for the current and past 4 tax years. Total up all receipts from all platforms. If gross income exceeded GBP 1,000 in any year, a tax return was required.
2. Register for Self Assessment if you have not already done so. You can register online at GOV.UK. If you are late, HMRC may charge a penalty -- but registering and disclosing voluntarily significantly reduces the risk of larger penalties.
3. Gather your records. Platform dashboards (Etsy, eBay, Amazon Seller Central) typically provide annual or monthly summaries of gross sales, fees charged and returns processed. Export this data and reconcile it against your bank statements.
4. Decide: trading allowance or actual expenses? If your allowable costs are under GBP 1,000, the trading allowance is simpler. If costs exceed GBP 1,000, claim actuals.
5. Consider VAT. If your gross sales have approached or exceeded GBP 90,000 in any rolling 12-month period, take urgent advice. Late VAT registration can result in significant back-payments plus penalties.
6. If you have undeclared income from prior years, disclose voluntarily. Use HMRC's online disclosure facility or seek advice from a tax adviser or accountant. Early disclosure saves money and avoids the risk of formal enquiry.