I'm a Sole Trader, Do I Need to Register with Companies House?

No. Sole traders are not required to register with Companies House. Companies House is the registrar for limited companies and other incorporated entities, and since a sole trader isn't a separate legal entity, there's nothing to register there.

That doesn't mean you have no registration responsibilities at all. Here's what you do need to do and what comes with running a business as a sole trader.

Key Takeaways

• Sole traders do not need to register with Companies House. Registration there is only required when forming a limited company or partnership.
• Sole traders must register with HMRC for Self Assessment to report income, expenses, and pay the correct tax. This is done online through the HMRC website.
• Sole traders pay Income Tax on profits and Class 4 National Insurance contributions. Class 2 National Insurance was abolished from April 2024, though voluntary contributions may still be available to protect State Pension entitlement.
• If you trade under a business name rather than your own, it must follow HMRC naming rules and cannot include terms like "Limited" or "Ltd."
• As a sole trader, you and the business are legally the same entity, meaning personal assets are exposed if the business has debts. A limited company creates a legal separation and protects personal finances.

What Is Companies House and Does It Apply to Sole Traders?

Companies House is the official registrar of companies in the UK. It holds public records for limited companies, LLPs, and other incorporated entities, including directors, shareholders, and annual filings.

Sole traders don't register there because they don't create a separate legal entity. As a sole trader, you and your business are legally the same thing. There's no company to register, so Companies House isn't part of the picture.

Do Sole Traders Need to Register With HMRC?

Yes. While you don't register with Companies House, you do need to register with HMRC for Self Assessment. This is how the government tracks your business income and makes sure you're paying the right amount of tax.

You should register by 5 October following the end of the tax year in which you started trading. You can do this online through the HMRC website. Once registered, you'll file a tax return every year covering your income and expenses from the previous tax year.

What Tax Do Sole Traders Pay?

Sole traders pay Income Tax on their business profits through the Self Assessment system. The rate you pay depends on how much you earn and which income tax band you fall into.

You also pay Class 4 National Insurance contributions on profits above the lower profits limit. It's worth noting that Class 2 National Insurance was abolished from April 2024. If your profits are above the lower profits threshold, you'll receive National Insurance credits automatically. If your profits are below it, you can choose to pay Class 2 voluntarily to protect your entitlement to certain state benefits, including the State Pension. Check current HMRC guidance for the exact thresholds before filing.

Keeping accurate records of income and expenses throughout the year makes the Self Assessment process considerably more straightforward and helps you claim all the deductions you're entitled to.

What Other Responsibilities Do Sole Traders Have?

Business Name Rules

You can trade under your own name or choose a separate business name. If you use a trading name, it must follow HMRC's naming rules. It cannot include terms like "Limited," "Ltd," "LLP," or anything that implies your business is an incorporated entity, because it isn't.

Your trading name also cannot be offensive, misleading, or too similar to a registered company name. You don't need to formally register a trading name, but it's a good idea to check that no other business is already using it.

Record-Keeping

You're legally required to keep accurate records of all your business income and expenses. These records support your annual tax return and allow you to claim allowable expenses to reduce your tax bill. HMRC can request to see your records, so storing them securely for at least five years after the relevant Self Assessment deadline is essential.

Good bookkeeping software makes this considerably easier and reduces the chance of errors at tax time.

Sole Trader vs Limited Company: When Does It Make Sense to Incorporate?

Being a sole trader is the simplest way to start a business. There's minimal setup, no Companies House registration, and your tax reporting is handled through Self Assessment. For many people starting out, it's the right choice.

The main drawback is liability. As a sole trader, your personal assets are exposed if the business runs into debt. There's no legal separation between you and your business, which means any financial problems the business has are your problems personally.

A limited company changes that. It's a separate legal entity, which means your personal finances are generally protected if the business runs into difficulty. A limited company also protects your company name on the Companies House register, can look more credible to clients and suppliers, and can offer more flexibility in how you pay yourself as profits grow.

Many people start as sole traders and switch to a limited company once the business has traction. There's no obligation to incorporate early, but it's worth understanding what the change involves before you need it rather than after.

You can read more about the differences in our guide on sole trader vs limited company, or if you're ready to incorporate, take a look at our step-by-step guide to forming a limited company.

FAQs

Do sole traders need to register with Companies House?

No. Companies House registration is only required for limited companies, LLPs, and other incorporated entities. Sole traders are not a separate legal entity and have no obligation to register there.

How do I register as a sole trader with HMRC?

Register online through the HMRC website using the Self Assessment system. You'll need a Government Gateway account and will confirm your personal details and the nature of your business. Register by 5 October following the tax year in which you started trading to avoid a late registration penalty.

Do sole traders pay National Insurance?

Sole traders pay Class 4 National Insurance on profits above the lower profits limit. Class 2 National Insurance was abolished from April 2024. If your profits are above the lower profits threshold, NI credits are applied automatically. Below that threshold, you can pay Class 2 voluntarily to protect your entitlement to State Pension and certain other benefits. Check current HMRC guidance for the relevant figures before filing.

Can a sole trader use a trading name?

Yes. You can trade under a business name rather than your own name. The name must follow HMRC's naming rules and cannot include terms like "Limited" or "Ltd." It also cannot be misleading or too similar to an existing registered company name.

What records does a sole trader need to keep?

You must keep accurate records of all business income and expenses. These support your annual Self Assessment return and allow you to claim allowable expenses. HMRC can request to see your records, so keep them securely for at least five years after the relevant Self Assessment deadline.

When should a sole trader consider forming a limited company?

Consider incorporating when you want to protect your personal assets from business liability, when your profits are at a level where a limited company structure may be more tax efficient, or when you want your company name protected on the Companies House register. An accountant can help you decide when the timing makes sense for your situation.

Can I switch from sole trader to limited company later?

Yes. Many people start as sole traders and incorporate once the business grows. The switch involves forming a limited company with Companies House, opening a business bank account in the company name, and updating HMRC. You can keep trading throughout the process.

This article is for general information only and does not constitute legal or tax advice. Tax rules, National Insurance rates, and HMRC requirements can change. Always check current guidance on GOV.UK and speak to a qualified accountant before making decisions about your business structure or tax obligations.