Register as a Sole Trader to Sell on eBay UK

Most people who start selling on eBay for profit never "register" anything in the way they might expect. There is no certificate, no fee to pay to the government and no form that makes you a sole trader on a particular day. That is why the question comes up so often: do I need to register, when, with whom, and what do I do in the first week? The honest answer is that in the UK you become a sole trader by starting to trade, and the obligations that follow are mostly about telling HMRC at the right time, keeping records from the first sale and giving eBay accurate business details.

This guide walks through that in the order you will meet it. It covers what GOV.UK says a sole trader is, the point at which registration with HMRC becomes necessary, how to register for Self Assessment, how long the tax reference number takes, what to do about your business name, how to set up an eBay business account, and the dates that decide when your first tax return and first payment fall due. Every figure was checked against official pages in October 2026, and the sources are listed at the end.

The short version

You do not have to register before you start trading as a sole trader. GOV.UK says you can start without registering, but you must keep records from the day you start.
You must register for Self Assessment as a sole trader if you earn more than £1,000 in a tax year. The tax year runs from 6 April to 5 April.
The deadline to tell HMRC is 5 October after the end of the tax year in which you passed that point. For the 2025 to 2026 tax year, GOV.UK gives 5 October 2026.
You can register earlier than you have to, and many new sellers sensibly do, because the reference number can take weeks by post.
eBay treats anyone reselling bought items as a business seller, so the eBay business account and the HMRC registration are two separate steps that should match.
Tax rates, thresholds and dates change. Confirm every figure on the linked official page before relying on it.

1. What "sole trader" actually means

GOV.UK describes a sole trader as the simplest business structure to set up and keep records for. You work for yourself, you are classed as self-employed, and you make all the business decisions. You can be a sole trader as your only job or alongside a job where you are an employee.

Two consequences matter more than the label. First, a sole trader has unlimited liability: you are personally responsible for all debts of the business, with no legal separation between you and it. GOV.UK points out that business insurance may give more protection. Second, you keep all the profits after tax, and they are taxed as your personal income through Self Assessment, with HMRC working out any Income Tax and National Insurance from your profits when you send your return.

Being a sole trader is therefore a description of what you are doing, not a status you apply for. If you want to compare it with a limited company before you commit, our guide to sole trader or limited company sets out the trade-offs; this post assumes you are starting as a sole trader, which is where most people begin.

2. When registration with HMRC is actually needed

GOV.UK's sole trader page says you must register for Self Assessment as a sole trader if you earn more than £1,000 in a tax year. The £1,000 figure is the same as the trading allowance. The allowance guidance on GOV.UK says that if your gross trading income is over £1,000 you register for Self Assessment, and that "gross" means the total you would report on your tax return before any allowances or expenses are taken off. Spending money on stock does not pull you back under the line.

That last point catches new eBay sellers. Suppose, purely as an illustration, that you sell £1,100 of goods in a tax year and the goods cost you £700 to buy. Your profit is £400, but your gross trading income is £1,100, which is over £1,000. The test is about the gross figure, so registration is needed. We cover how the allowance and your expenses interact in a separate post, The £1,000 Trading Allowance, because that is where many sellers make the wrong choice.

The tax year, not the calendar year

The £1,000 is counted over a tax year, which runs from 6 April to 5 April. A seller who begins in November 2026 is in the 2026 to 2027 tax year, which runs from 6 April 2026 to 5 April 2027.

Other reasons to register even under £1,000

The same GOV.UK allowance guidance lists situations where you need to be registered whatever your income: if you want to claim loss relief, pay voluntary Class 2 National Insurance, claim Tax Free Childcare on self-employment income or claim Maternity Allowance based on self-employment. It also says you cannot use the allowance against trading income from a partnership, or from your employer, your spouse's or civil partner's employer, or a company you or a connected person owns or controls.

Selling versus trading

Not every eBay sale is trading. HMRC's guidance, as reported by Full Fact when platform reporting began, is that selling your own unwanted items such as used clothes, an old TV or unwanted furniture does not mean paying Income Tax, while buying goods to resell, or making goods to sell for profit, is likely to be trading. HMRC's Business Income Manual lists nine "badges of trade", including profit-seeking motive, the number of transactions, how quickly an item is resold after purchase and how the sale is carried out. It says no single badge is conclusive and the overall impression decides. Reselling bought stock repeatedly, which is what a dropshipper does by definition, sits firmly on the trading side. Our post on what separates a hobby from a shop looks at the grey area in more depth.

3. The registration deadline, worked through

GOV.UK says that if you need to complete a tax return for the previous tax year and either you have never sent one before, or you registered before but did not need to send one for 2024 to 2025, you must tell HMRC by 5 October 2026. Registering after that date could result in a penalty. The sole trader page adds that you can register earlier than required.

In practice the deadline falls on 5 October after the end of the tax year in which you first had to register. Here is what that looks like for two illustrative sellers who both begin in the 2026 to 2027 tax year.

Illustrative seller	Tax year of first trading income over £1,000	Tell HMRC by	Online return and tax due by
Starts selling in May 2026, passes £1,000 by August 2026	2026 to 2027 (6 April 2026 to 5 April 2027)	5 October 2027	31 January 2028
Starts selling in November 2026, passes £1,000 by February 2027	2026 to 2027 (same tax year)	5 October 2027	31 January 2028

The pattern comes from GOV.UK's own dates for the 2025 to 2026 tax year: register by 5 October 2026, online return by 11:59pm on 31 January 2027, tax paid by the same time. The 2026 to 2027 dates in the table apply the same rule one year on, so confirm them on GOV.UK when the time comes. Notice that the two sellers start in different months yet share every deadline, because only the tax year matters.

If you are reading this after 5 October 2026 and think you should already have registered for 2025 to 2026, do not wait. GOV.UK's deadlines page says that if you register after 5 October 2026, HMRC will send a letter or email with a different return deadline, 3 months from the date on it, but you must still pay the tax you owe by 11:59pm on 31 January 2027 or get a penalty. GOV.UK's penalties page gives the penalty for filing late as £100 to start with, then daily penalties after 3 months, then percentage charges, and notes that registering after 5 October can also lead to a "failure to notify" penalty if you do not pay all of your tax bill by 31 January. The page does not give the amount for that one, so use HMRC's estimator or ask HMRC rather than guessing.

4. How to register for Self Assessment, step by step

Step 1: check whether you need to

GOV.UK provides a "check if you need to send a tax return" service. Use it first. If you have never filed a return and your gross trading income has passed £1,000, the answer will be yes.

Step 2: get your sign-in details

HMRC online services accept either a Government Gateway user ID or a GOV.UK One Login (an email address and password). If you have never used HMRC online services, choose "Create new sign in details" when you sign in. If you already use HMRC online services, keep using your existing sign-in details. GOV.UK's sign-in page says to choose that option even if you have One Login details from another government service, and that the service then guides you through creating either kind of login.

Step 3: complete the registration

Go to GOV.UK's Register for Self Assessment page, choose Start now and follow the questions. You will say that you are registering as self-employed (a sole trader). If you registered in the past but did not send a return last year, you may need to reactivate your Self Assessment account instead, and the service explains how. If you live abroad you cannot register online and must register by post using form SA1.

Step 4: wait for the Unique Taxpayer Reference

The UTR is the Unique Taxpayer Reference HMRC uses for your Self Assessment. GOV.UK says that if you register online your UTR will be in your personal tax account within 72 hours. If it comes by post it usually takes about 15 working days, or 21 days if you are abroad, and can take longer in busy periods. If it has not arrived after that time, GOV.UK points you to a page where you can check when to expect it.

That timing is the practical argument for registering early.

5. Choosing and using a business name

GOV.UK says you can trade under your own name or choose another name for the business. A sole trader name must not include "limited", "Ltd", "limited liability partnership", "LLP", "public limited company" or "plc", must not be offensive and must not be too similar to another company's trade-marked name. If someone complains about a name that is too close to a trade mark, you may have to change it, which on eBay would mean rebranding listings and any shop name.

The same page says you must include your name and your business name, if you have one, on official paperwork such as invoices and letters. GOV.UK links to a trade mark search, and it is worth using before you commit to a name and a logo.

6. Setting up the eBay side

Registering with HMRC and registering with eBay are separate and neither triggers the other. eBay's UK business seller policy says sellers must register as a business if, for example, they sell items they have bought to resell, they make items in order to sell them, or they buy items for their business. It also says business sellers cannot present themselves as private individuals. Dropshipping is resale, so it falls under the business rules.

Choosing the account type

eBay's seller centre page on business accounts says you should register a business account if you plan to sell large quantities, have items you have made or bought to resell, or already have a business outside eBay. You select "Create a business account" at registration and eBay asks for details such as your business name, business type and address. Check eBay's current help pages for how to change an existing personal account to a business account.

What eBay verifies

eBay's page on registering as a seller says it confirms your identity, your bank account for payouts and your business details, and that checks can happen again whenever relevant details change. For a sole trader or registered business it asks for the legal business name, any trading name, a registration number where there is one and the business address, plus identity details for the people involved. For sole traders it lists the accepted proof of identification as an HMRC Self Assessment document, an HMRC document from the last tax year or a tax return from within the last 2 years, plus identity documents for the people listed on the account. That is one more reason to register with HMRC early. Names on documents must match your eBay account.

The bank account

The same eBay page says the name on your bank account must match the name on your eBay account to pass verification, and that account types must match: it states that a business eBay account requires a business bank account, using the business name on the bank account. If you are unsure what that means for a sole trader with an existing personal account, read our post, does a dropshipper actually need a business bank account, and then check eBay's current wording on the registering page, because this is the area where the rules are most specific.

What a business seller must show and offer

The business seller policy lists the information you must put in listings: full business contact details, any trade organisations you belong to, any relevant authorisation scheme, clear pricing including postage, delivery charges and tax, and a VAT number if your activity is subject to VAT. It also says you must set a returns policy, that buyers have 14 days to withdraw from contracts covered by the Consumer Contracts Regulations, and that faulty items covered by the Consumer Rights Act 2015 must be accepted back within 30 days with a full refund. Business sellers cannot charge restocking fees or keep the original postage on returns. Our post on business versus private selling goes through the practical effect of those rules.

7. Records from the first sale

GOV.UK's sole trader page says to keep records from the day you start trading, because you need them to work out your profit or loss for Self Assessment. The records page says sole traders must keep records of business income and costs, and your personal income as well. You can prepare accounts for any period you choose, though matching the tax year of 6 April to 5 April can make your return easier. If you do not prepare accounts, you record income and expenses for each tax year.

GOV.UK also says cash basis is the default from the 2024 to 2025 tax year. Under cash basis you record income when you are paid and expenses when you pay them; under traditional accounting you use the invoice or bill date. You can opt out of cash basis.

Keep, at a minimum:

An export of every eBay sale, including the amount the buyer paid, the fees eBay took and the date.
Supplier invoices or order confirmations for every item you bought to fulfil an order.
Receipts for anything else you spend on the business, such as packaging, subscriptions and software.
Records of refunds, so that sales are not overstated.

As for how long to keep them: GOV.UK's general rule for most Self Assessment records is at least 22 months after the end of the tax year if you sent your return on time, or at least 15 months after you sent it if you were late. The same page says self-employed people must keep business income and costs records for longer, and refers you to a separate page for that period, so confirm it there. See what counts as a business expense for a dropshipper for what is worth keeping receipts for.

8. What the first tax year looks like in money and dates

A new sole trader's first return can produce a bigger payment than people expect, because of how payments on account work. GOV.UK says payments on account are advance payments towards the next Self Assessment bill, including Class 4 National Insurance. You must make them unless last year's tax bill was under £1,000, or you paid more than 80% of last year's tax outside Self Assessment. There are two payments, due by midnight on 31 January and 31 July, each usually half of last year's tax. In the first year, GOV.UK says you pay the full tax bill and the first payment on account together by 31 January.

Here is an illustrative sum, with numbers chosen only to show the mechanism. Suppose your first-year bill comes to £2,400. By 31 January you pay £2,400 plus a first payment on account of £1,200 (half of £2,400), which is £3,600. The second payment on account of £1,200 follows on 31 July. If the next year's bill turns out to be £2,400 again, the two payments of £1,200 cover it exactly. If it is higher, you pay the difference on the following 31 January. If you expect a lower bill, GOV.UK says you can ask HMRC to reduce the payments online or by form SA303, but you will be charged interest on the difference if your final bill is higher than expected.

How much tax, roughly

For 2026 to 2027, GOV.UK lists the Personal Allowance at £12,570 and the basic rate of Income Tax at 20% on income from £12,571 to £50,270, with 40% above that up to £125,140 and 45% beyond. Those bands apply in England, Wales and Northern Ireland; GOV.UK says Scotland's bands differ. For self-employed National Insurance in 2026 to 2027, GOV.UK gives Class 4 at 6% on profits over £12,570 up to £50,270 and 2% above. Class 2 is £3.65 a week, paid only voluntarily, when profits are below the £7,105 small profits threshold.

9. Other things to check once you are registered

VAT

VAT registration is separate from Self Assessment. GOV.UK says a business must register if its VAT taxable turnover is more than £90,000, and that businesses below that can register voluntarily. The sole trader page says you can register voluntarily to reclaim VAT on business expenses. Do not register voluntarily without understanding that you would then charge VAT on sales. Our post on VAT for UK dropshippers covers it in depth.

Making Tax Digital

GOV.UK says Making Tax Digital for Income Tax started on 6 April 2026 for sole traders and landlords with qualifying income above £50,000, extending to those above £30,000 from April 2027 and above £20,000 from April 2028. Qualifying income means gross self-employment and property income before allowances or expenses. GOV.UK says people covered must keep digital records and send quarterly summaries using compatible software.

10. Common mistakes

Waiting for profit. The registration test is gross trading income over £1,000, not profit. Costs do not lower it.
Leaving the UTR to the last minute. By post it usually takes about 15 working days and sometimes longer.
Forgetting the first-year payment on account. The first January bill can include the tax due plus half as much again toward the next year.
Claiming expenses and the allowance together. GOV.UK says you cannot deduct other expenses if you use the trading allowance.

11. Where to go next

Once the paperwork is done, pricing, listing quality and supplier reliability decide whether the business makes money. Sellhelm, the eBay dropshipping software this blog belongs to, prices every listing from your real fees, and the fee calculator does the same sum for one item. The guide on how to dropship on eBay covers the model itself, and Self Assessment for eBay sellers walks through the return you will eventually file.

Sources and how we checked

Facts in this guide were checked against these official pages in October 2026. Rules and figures change, so confirm anything that affects a decision. This is general information, not legal or tax advice.

Questions people ask

Do I have to register as a sole trader before I sell on eBay?

GOV.UK says you can start trading without registering. You must keep records from the day you start, and you must register for Self Assessment as a sole trader if you earn more than £1,000 in a tax year (6 April to 5 April).

What is the deadline to register for Self Assessment?

GOV.UK says you must tell HMRC by 5 October after the end of the tax year in which you needed to file. For the 2025 to 2026 tax year the date is 5 October 2026. Registering late could result in a penalty.

How long does it take to get a UTR?

GOV.UK says that if you register online your UTR will be in your personal tax account within 72 hours. By post it usually takes about 15 working days, or 21 days if you are abroad, and can take longer in busy periods.

Can I use a trading name instead of my own name?

GOV.UK says you can trade under your own name or another name. The name must not include words such as limited, Ltd, LLP or plc, must not be offensive and must not be too similar to another trade mark. Your name and business name go on invoices and letters.

Does eBay need to know I am a sole trader?

eBay UK says sellers must register as a business if they sell items they bought to resell. It asks registered business sellers, which includes sole traders, for a legal business name, any trade name and a business address, and may ask for HMRC documents. Check eBay UK help for current requirements.

Is my profit or my turnover the figure that counts toward £1,000?

GOV.UK explains that gross income means the total you would report before any allowances or expenses are deducted. So the £1,000 test is about turnover from trading, not profit, and the cost of stock does not lower it.

Registering as a Sole Trader to Sell on eBay in the UK: The Step-by-Step Guide