Starting your own business is an exciting step, but registering correctly with HM Revenue & Customs (HMRC) is essential to avoid missed tax deadlines and unexpected penalties.

Whether you are becoming a freelance designer, starting a consultancy, opening an online shop or running a small trade business, understanding how to register as a sole trader will help you establish your business on the right footing.

The good news is that sole trader registration is generally straightforward. You do not need to incorporate a limited company, and registering for Self Assessment directly through HMRC is free.

However, you need to understand when registration becomes compulsory, what information HMRC requires and which tax obligations apply after registration.

This Accfirm guide explains how to register as self-employed with HMRC, obtain your Unique Taxpayer Reference (UTR), understand the registration deadlines and manage your tax responsibilities during the 2026/27 tax year.

Quick answer: How do you register as a sole trader in the UK?

To register as a sole trader, visit GOV.UK, check whether you need to register for Self Assessment, and complete HMRC’s online registration process. You will need your personal details, National Insurance number and business information. HMRC will then issue or confirm your Unique Taxpayer Reference (UTR).

1. What is a sole trader in the UK?

A sole trader is a self-employed individual who owns and runs a business personally. A sole trader keeps the business profits after tax but is also personally responsible for business debts and liabilities.

Sole traders are not required to register a company with Companies House. Instead, they register their self-employment with HMRC when the relevant registration requirements apply.

You can operate as a sole trader in a wide range of occupations, including:

• Freelance writing, graphic design and web development.

• Plumbing, electrical work, building and other trades.

• Business consultancy, bookkeeping and professional services.

• E-commerce, online retail and independent shops.

• Hairdressing, beauty services and personal training.

• Private tutoring, photography and delivery services.

Unlike a limited company, a sole trader business is not a separate legal entity from its owner. You are personally responsible for the business’s financial obligations, subject to applicable legal protections.

A sole trader reports business income and allowable expenses through their personal Self Assessment tax return. Business profits may be subject to Income Tax and National Insurance contributions.

Sole trader vs limited company: What is the difference?

The main difference is that a sole trader and their business are legally the same person, whereas a limited company has a separate legal identity.

A company director may also operate a separate sole trader business. However, income earned by the company belongs to the company and should not be reported as the director’s personal self-employment income.

Accfirm tip: Before registering, consider your expected profits, commercial risks, administrative requirements and long-term business plans. The appropriate business structure depends on more than tax rates alone.

2. Do you need to register as a sole trader with HMRC?

You generally need to register as a sole trader if your gross self-employment income exceeds £1,000 in a tax year. Registration may also be necessary below that threshold for specific tax, National Insurance or benefit-related reasons.

The UK tax year runs from 6 April to 5 April the following year.

When is sole trader registration compulsory?

HMRC requires sole trader registration in circumstances including:

• Your gross self-employment income exceeds £1,000 during the tax year.

• You need to demonstrate self-employed status for certain purposes, such as claiming Tax-Free Childcare.

• You need to make voluntary Class 2 National Insurance contributions.

• You need to register as a subcontractor under the Construction Industry Scheme (CIS).

If you are already registered for Self Assessment because of rental income, investments or another reason, you still need to notify HMRC that you have started working as a sole trader.

Do you need to register if you earn less than £1,000?

You do not normally need to register for Self Assessment solely because of trading income of £1,000 or less in a tax year, provided you qualify for the trading allowance and have no other reason to register.

The trading allowance is an annual tax exemption of up to £1,000 for eligible individuals with trading income.

Importantly, the £1,000 threshold relates to gross income before expenses, not the profit remaining after business costs.

Example: A freelance photographer

Sarah starts a photography business and receives £1,400 from customers during the 2026/27 tax year.

Her business expenses total £600.

Sarah’s gross trading income exceeds £1,000, so she must register for Self Assessment even though her profit is only £800.

Sarah may be able to use the £1,000 trading allowance instead of deducting her actual £600 of expenses.

If she qualifies, the allowance could reduce her taxable trading profit to £400. However, she cannot claim the trading allowance and deduct her actual business expenses against the same income.

The registration requirement remains separate from whether Sarah ultimately has Income Tax to pay.

Can you register before earning £1,000?

Yes. You can register as self-employed before your trading income reaches £1,000, provided you have genuinely started trading or have another valid reason to register.

Early registration can help you establish your Self Assessment record and prepare for your first tax return.

However, registering for Self Assessment may result in HMRC requiring you to submit annual tax returns, even if your income is low.

If HMRC issues a notice to file a tax return, you must deal with that notice rather than assuming that no return is needed because your earnings are below the trading allowance.

3. What documents and information do you need to register as a sole trader?

To register as a sole trader with HMRC, prepare your National Insurance number, personal identification details, contact information and details of your self-employment.

HMRC requires a National Insurance number for the standard sole trader Self Assessment registration process.

You do not normally need to prepare company incorporation documents or a certificate of incorporation when registering as a sole trader.

If you do not have a National Insurance number, check the government application process before attempting to complete your registration.

4. How to register as a sole trader with HMRC: Step-by-step guide

You can register as a sole trader online through the official GOV.UK service. The process involves checking your registration requirements, providing your personal and business details, completing HMRC’s identity checks and obtaining access to your Self Assessment account.

Follow these steps to register your business correctly.

Step 1: Check whether you need to register for Self Assessment

Before beginning your registration, establish whether your business income or circumstances require you to notify HMRC.

If you are starting a new sole trader business and expect to exceed the £1,000 gross trading income threshold, you should plan to register for Self Assessment.

If you already have a UTR, have submitted Self Assessment returns previously or receive income from other sources, HMRC may direct you through a different registration process.

Use the official HMRC Self Assessment registration checker  to identify the correct route.

Step 2: Visit the official HMRC sole trader registration page

Go to the GOV.UK website and select the option to register as a sole trader.

Avoid paying third-party websites simply to submit a standard HMRC registration application.

You may choose to pay an accountant for professional advice or assistance, but the government registration itself does not require a commercial service provider.

Step 3: Sign in to your HMRC online account

HMRC’s online registration process will direct you to sign in using the applicable government sign-in service.

If you do not already have the required sign-in credentials, follow the instructions to create them and complete any identity checks.

You may be asked to verify your identity using personal information or identification documents, depending on the sign-in and registration route available to you.

Keep your sign-in details secure. You will need access to your HMRC online account to manage your Self Assessment obligations.

Important: Your government sign-in credentials and your Unique Taxpayer Reference are different. A sign-in allows you to access the service, while a UTR identifies your tax record.

Step 4: Enter your personal information

Complete the personal information requested by HMRC.

Depending on the registration route, you may be asked for your:

• Full legal name and date of birth.

• National Insurance number.

• Current home address.

• Telephone number and email address.

• Existing tax reference, if applicable.

Check that your details match HMRC’s records.

For example, an incorrect National Insurance number or mismatched personal details can delay identity verification or prevent you from completing the application successfully.

Step 5: Provide your sole trader business details

HMRC will need information about your self-employment so it can record the nature and start date of your business.

You should be prepared to provide:

The information in this table is illustrative. Enter your actual business details on the HMRC form.

What counts as your business start date?

Your start date should reflect when you actually started carrying on your trade, based on your circumstances.

For example, if you began providing paid consultancy services in September 2026, that may be your trading start date even if you did not receive your first customer payment until October.

Buying equipment, developing a business plan or registering a domain name does not automatically establish that trading has begun.

Keep evidence of your business activity and seek professional advice if the start date is unclear.

Step 6: Submit your sole trader registration

Review your application before submitting it.

Make sure that your personal information, business description and trading start date are accurate.

After submitting your application, retain any confirmation or reference provided by HMRC.

Do not assume that submitting the registration application also means you have filed your first tax return.

Registration establishes your self-employment record. Reporting your income and paying the tax due are separate obligations.

Step 7: Obtain your Unique Taxpayer Reference (UTR)

After registration, HMRC will issue or confirm your Unique Taxpayer Reference.

Your UTR is a 10-digit number used to identify your Self Assessment tax record.

Keep the reference somewhere secure because you may need it when submitting tax returns, contacting HMRC or authorising an accountant to act on your behalf.

10. What business records must a sole trader keep?

Sole traders must keep accurate records of business income and expenses to prepare their Self Assessment tax returns and support the figures reported to HMRC.

You should begin keeping records as soon as you start trading, rather than waiting until you receive your UTR or complete your first tax return.

Essential records for sole traders

If you use your personal bank account for business transactions, you must still maintain records that allow you to distinguish business income and expenditure from personal transactions.

How long must sole traders keep their records?

HMRC generally requires self-employed individuals to retain their business records for at least five years after the 31 January Self Assessment submission deadline for the relevant tax year.

For example, records relating to the 2026/27 tax year would normally need to be retained until at least 31 January 2033.

Longer retention periods may apply in certain circumstances, including where a tax return is submitted very late.

Should you use accounting software?

Accounting software can simplify the management of invoices, business expenses, bank transactions and tax estimates.

A spreadsheet may be sufficient for some small businesses that are not required to use Making Tax Digital. However, businesses within the Making Tax Digital system need compatible software and must meet the applicable digital record-keeping and submission requirements.

If you are unsure which system is appropriate, an accountant can help you choose software that suits your turnover, business activities and reporting obligations.

11. What expenses can sole traders claim after registering?

Sole traders can generally deduct allowable business expenses when calculating their taxable trading profits.

An expense must satisfy the applicable tax rules. In particular, ordinary revenue expenses generally need to be incurred wholly and exclusively for business purposes.

Where expenditure has both business and personal elements, only the allowable business portion can normally be claimed.

Common categories of allowable expenses include:

• Office equipment, stationery and business software.

• Business insurance and professional subscriptions.

• Advertising, website hosting and marketing costs.

• Business-related telephone and internet costs.

• Eligible travel, vehicle and accommodation expenses.

• Accountancy fees and other qualifying professional costs.

• Business premises expenses or eligible home-working costs.

The precise tax treatment depends on the nature of the expenditure. Capital expenditure, private expenditure and certain other costs may be subject to different rules.

Example: Business expenses for a freelance designer

A freelance designer earns £28,000 during the tax year and incurs £4,000 in allowable business expenses.

Their trading profit before other tax adjustments is £24,000.

The designer would generally calculate Income Tax and National Insurance using their taxable trading profit, rather than the full £28,000 received from customers.

Important: If you choose to deduct the £1,000 trading allowance instead of actual expenses, you cannot also deduct the same business’s actual expenses against that income.

For a detailed explanation of deductible business costs, see Accfirm’s guide to Allowable Expenses for Sole Traders .

12. Can you register as a sole trader while employed?

Yes. You can work as an employee and operate a separate sole trader business at the same time.

You may need to register for Self Assessment if your additional self-employment income exceeds the relevant registration threshold, even if your employer already deducts Income Tax and National Insurance through PAYE.

Example: Starting a side business while employed

Emma works full-time and earns £32,000 a year through PAYE.

She starts a freelance writing business and receives £8,000 in gross trading income during the 2026/27 tax year.

Emma must generally register her self-employment with HMRC and report her freelance income through Self Assessment.

Her PAYE employment income and taxable self-employment profits will both be relevant when calculating her overall Income Tax liability.

Her employer will continue to deduct PAYE tax and employee National Insurance from her salary. Any Class 4 National Insurance due on her self-employment profits will be assessed under the applicable self-employed rules.

Accfirm tip: If you are starting a business alongside employment, check your employment contract for any restrictions on outside work, conflicts of interest or use of your employer’s confidential information.

13. Can you register as a sole trader using a business name?

Yes. A sole trader can trade under their own legal name or use a separate business name.

For example, James Carter could operate under the trading name Carter Digital Marketing.

However, choosing a business name does not create a separate limited company or provide limited liability.

HMRC and other authorities will still identify the individual as the business owner.

Sole trader business name rules

Your sole trader business name must not include restricted company designations such as Limited, Ltd, LLP or plc.

The name must not be offensive or infringe another business’s trademark rights.

You must also include your own name and any business name used on official business paperwork, such as invoices and letters.

Before choosing a trading name, check whether another business already uses it and whether any relevant trademark restrictions apply.

You can search the UK Intellectual Property Office trademark database  when researching a prospective business name.

14. Common mistakes to avoid when registering as a sole trader

Registration errors can create unnecessary correspondence, delayed tax returns and unexpected financial liabilities.

Understanding the most common mistakes can help you establish a more reliable accounting process from the beginning.

Mistake 1: Confusing turnover with profit

The £1,000 trading income threshold is based on gross trading income before expenses, not profit.

A business earning £12,000 in turnover with £11,500 in expenses does not fall below the registration threshold simply because its profit is only £500.

Mistake 2: Missing the 5 October registration deadline

New sole traders sometimes assume they only need to register when their first tax return becomes due.

However, the standard notification deadline is 5 October following the relevant tax year.

Registering before the deadline gives you more time to resolve any issues with HMRC and prepare your return.

Mistake 3: Failing to register an existing Self Assessment account for self-employment

An individual may already submit Self Assessment returns for rental income or another reason.

Starting a sole trader business still requires the individual to notify HMRC of the new self-employment activity.

Do not assume that holding a UTR automatically means HMRC has recorded your new business.

Mistake 4: Spending business income without reserving money for tax

Sole traders generally receive customer payments without PAYE Income Tax being deducted at source.

This can make business income appear more readily available than it actually is.

Set aside an appropriate proportion of your profits for tax and National Insurance.

Your required tax reserve will depend on your total income, allowable expenses, tax rates, other tax deductions and any payments on account.

Mistake 5: Forgetting about payments on account

Payments on account are advance payments towards the following year’s Self Assessment liability.

They are normally made in two instalments, due on 31 January and 31 July.

Payments on account may be required if your previous Self Assessment tax liability was at least £1,000, unless you paid more than 80% of your tax outside Self Assessment or another relevant exception applies.

For a new sole trader, the first January payment can therefore include both the outstanding tax for the previous year and a payment on account towards the current year.

Mistake 6: Mixing personal and business expenses

Paying personal expenses from a business account does not automatically make those expenses tax-deductible.

Similarly, withdrawing money from a sole trader business for personal use is generally treated as an owner’s drawing, rather than a deductible business expense.

Maintain clear records so that private spending is not incorrectly included in your tax calculations.

Mistake 7: Ignoring VAT and Making Tax Digital requirements

Self Assessment registration does not automatically register your business for VAT.

Equally, registering as a sole trader does not automatically complete your Making Tax Digital enrolment or fulfil any quarterly reporting obligations that may apply.

Check each requirement separately as your business develops.

15. What should you do after registering as a sole trader?

After registering with HMRC, your next priority should be establishing a reliable system for managing business income, expenses and tax deadlines.

You should also review your bookkeeping arrangements regularly, particularly if you begin employing staff, acquire expensive equipment, enter new markets or experience substantial growth in turnover.

16. Frequently asked questions about sole trader registration

Is registering as a sole trader the same as registering as self-employed?

For an individual starting a sole trader business, registering as self-employed generally means registering that business activity with HMRC for Self Assessment. Different registration arrangements may apply to other forms of self-employment, including partnerships and individuals working through limited companies.

Can I start trading before registering as a sole trader?

Yes. You can generally begin carrying on a sole trader business before completing HMRC registration, provided you meet the applicable notification deadline. You must still comply with any licensing, insurance or other requirements relevant to your business activities.

Can I register as a sole trader without a National Insurance number?

HMRC requires a National Insurance number for the standard online sole trader Self Assessment registration process. If you do not have one, check whether you can apply for a National Insurance number before registering.

Do I need an accountant to register as a sole trader?

No. You can register directly with HMRC without using an accountant. However, an accountant can help you understand your registration obligations, select an appropriate accounting method, organise business records and prepare your Self Assessment returns.

Do I need to register a business name with Companies House?

No. Sole traders do not need to incorporate a company to operate under a trading name. You can trade under your own name or another permitted business name, subject to applicable naming and trademark rules.

Can I be a sole trader and a limited company director at the same time?

Yes. An individual may be a director of a limited company and independently operate a sole trader business. The company and the individual’s personal trade must be accounted for separately. Company income is not automatically the director’s personal self-employment income.

What happens if I register but earn no money?

Registering as a sole trader does not automatically mean that Income Tax will be payable. If HMRC requires you to submit a Self Assessment return, you must still file it unless HMRC withdraws the filing requirement. You should report your actual business results and check whether your National Insurance record needs attention.

Can I register more than one sole trader business?

Yes. An individual can operate more than one sole trader business. You should maintain appropriate records for each activity and report the relevant income and expenses through your personal tax affairs. Different activities do not automatically create separate £1,000 trading allowances or separate personal tax identities.

Does registering as a sole trader affect Universal Credit?

Self-employment can affect Universal Credit because business earnings and other relevant circumstances may change your entitlement. The Department for Work and Pensions has separate rules for assessing self-employed earnings, reporting income and applying the minimum income floor where relevant.

If you receive Universal Credit, check the current reporting requirements and notify the DWP about your self-employment as required.

Can I stop being a sole trader after registering?

Yes. If you stop trading, you should notify HMRC that your self-employment has ended and complete any outstanding tax reporting obligations. Do not assume that ceasing business activity automatically removes an existing Self Assessment filing requirement.

17. How Accfirm can help you register as a sole trader

Registering with HMRC is only the first step towards running a financially organised business.

As your income increases, you may need professional support with Self Assessment, allowable expenses, National Insurance, VAT registration, Making Tax Digital and business tax planning.

Accfirm provides accounting support for UK sole traders, freelancers and small business owners who want to understand their tax obligations and manage their business finances more effectively.

Our sole trader accountants  can help you understand the accounting requirements associated with starting and running a self-employed business.

Professional accounting support can be particularly useful if you are moving from employment into self-employment, operating multiple businesses or managing business income alongside employment or property income.

Final thoughts: Registering as a sole trader in the UK

Registering as a sole trader is generally straightforward, but understanding the correct registration process and your responsibilities after registration is essential.

If your gross trading income exceeds £1,000 in a tax year, you will normally need to register for Self Assessment, subject to the applicable rules and exceptions.

For individuals who start trading during the 2026/27 tax year, the standard registration deadline is 5 October 2027, with the first online tax return normally due by 31 January 2028.

Keep accurate business records from the beginning, plan for your future tax payments and review whether VAT or Making Tax Digital requirements apply to your circumstances.

If you need help understanding your obligations, speak with a qualified accountant before your reporting deadlines approach.