How To Register a UK Business in 2026: Everything You Need To Know

This can be a symbolically powerful moment, even if the reality is mostly about paperwork. Even so, this is when your business becomes an official entity, and can therefore be considered your “Day Zero”. That also means it can be a demoralising event if it goes wrong. But don’t worry, because today we’re going to walk you through all the ins and outs of registering your business so you can get off to the very best start. We’ll cover:

• When to register your business

• The different kinds of business structures

• How to choose your business structure

• Step-by-step guide to registering your business

• How much does business registration cost

• Registering for VAT

If you’re still feeling daunted by this process, don’t. It’s not as scary as it sounds, and by the time you’re done reading, you’ll know everything you need to easily register your business. So let’s get to it!

When to register your business

Depending on your structure, and how far along you already are in your setup and even your trading. For instance, if you’re operating as a sole trader (which we’ll talk about later), you only need to register with HMRC (His Majesty’s Revenue and Customs) once you start earning over £1000 in a tax year, so you have a little leeway if you start work before you register. 

For limited companies, though, you need to register before you begin trading, but you can complete the process in as little as 24 hours if you do it online. The difference is that as a sole trader, you’re operating as an individual (and as an individual, you exist before registration). As a limited company, your business only exists legally once you’ve registered it, so you can’t trade until your business exists!

If you’re applying to secure funding, signing contracts with partners, hiring your team, or building your brand, you may need to register earlier. And if you’re doing so by mail, instead of online, be sure to leave yourself longer (a week, to be safe), to ensure you’re registered and compliant right from the start.

The different kinds of business structures

Choosing the right business structure is one of the most important decisions you’ll make, as it affects everything from taxes to personal liability, but once you know what the options are, the appropriate one for you will likely be obvious. Here’s a breakdown of the main options in the UK:

Sole trader

A sole trader is the simplest business structure, where you operate as an individual and keep all profits after tax. You register with HM Revenue & Customs, but there’s no separate legal identity between you and the business, so if the business struggles financially, so will you.

Advantages: Easy to set up, minimal paperwork, full control, and lower costs.
Disadvantages: Unlimited personal liability (you’re personally responsible for the debts of the business), and potentially less credibility with larger clients.
Best for: Freelancers, tradespersons, consultants, and small, low-risk businesses just starting out.

Partnership

A partnership involves two or more people sharing responsibility for a business. This is a similar setup to sole trading, but with multiple people involved. The partners involved register with HM Revenue & Customs, though the business itself is not a separate legal entity (unless it’s a limited partnership or LLP).

Advantages: Shared workload, combined skills and resources, and a relatively simple setup.
Disadvantages: Each partner is still personally liable for debts, including those caused by other partners, unless structured as an LLP.
Best for: Professional services (like accountancy or legal firms) or businesses run jointly by trusted, dependable partners.

Limited company

Unlike a sole trader, a limited company is a separate legal entity from its owners, registered with Companies House. This means the company can own assets, enter contracts, and be liable for its own debts.

Advantages: Limited liability (your personal assets are protected), greater credibility, and potential tax efficiency.
Disadvantages: More administrative responsibility, including annual filings and accounts, as well as higher setup and running costs.
Best for: Growing businesses, those planning to take on loans or risks, or anyone planning to hire staff or seek investment.

Private company limited by guarantee

This structure is similar to a limited company but has no shareholders or share capital. Instead, it has members who act as guarantors. It’s also registered with Companies House.

Advantages: Limited liability and a clear legal structure without distributing profits.
Disadvantages: Profits cannot be paid out to members, but members still need to manage administration as with a limited company.
Best for: Non-profits such as charities, clubs, and community organisations.

Unlimited company

An unlimited company also registers with Companies House but, unlike a limited company, it offers no limit on members’ liability.

Advantages: Less admin, with less need for public financial disclosures in some cases.
Disadvantages: Members are fully liable for debts, making it a higher-risk option.
Best for: Rare, but sometimes used by businesses where owners are comfortable with risk and want increased financial privacy.

How to choose your business structure

Choosing the right structure comes down to balancing risk, control, and long-term plans. Start by thinking about how much liability you’re comfortable with. If your business carries financial risk, a limited company registered with Companies House can protect your personal assets, whereas sole traders and partnerships are personally liable if the business starts to accrue debts.

Next, think about taxation and profits. Sole traders and partners pay income tax via HM Revenue & Customs, while limited companies pay corporation tax, which can become more efficient as profits grow.

Finally, you’ll want to plan for the admin you’ll need to do. Simple structures (like setting up as a sole trader) mean less paperwork, while companies require ongoing filings and reporting, which you’ll either need to handle yourself or pay for an accountant to do.

Finally, factor in your future plans, if you intend to scale, hire staff (beyond an apprentice or assistant for a tradesperson), or seek investment, a limited company may well be the better choice.

Step-by-step guide to registering your business

Registering your business in the UK is a straightforward process, but the exact steps depend on your chosen structure. Here’s a practical guide to help you through it:

1. Choose your business name
Start by selecting a name to trade under. If you’re forming a limited company, your name must be unique, so you’ll need to check availability on the Companies House register and ensure it complies with naming rules.

2. Decide on your structure
Based on the information we’ve included above, confirm whether you’ll operate as a sole trader, partnership, or limited company, as this determines the registration process and legal responsibilities.

3. Gather essential information
You’ll typically need personal details (name, address, date of birth), a business address, and a description of your activities (which means finding your SIC code for companies, which means standard industrial classification, such as 73110 for advertising). Limited companies will also need to register their director and shareholder details.

4. Register with the relevant authority
Sole traders and partnerships register to self-assess your income tax with HM Revenue & Customs, which means each year you’ll be announcing your income and paying your income tax. Limited companies must be incorporated with Companies House, either online or via an agent. They’ll file their tax returns at the end of the financial year and pay corporation tax on the profits.

5. Prepare key documents (for companies only)
You’ll need a memorandum (a legal document declaring your intention to start a company) and articles of association which determines the relationship between members of the company and defines how the company will be run, plus details of shares and ownership structure.

6. Set up your business finances
Open a business bank account and ensure you’re ready to track income and expenses from day one.

7. Register for taxes if required
Depending on your turnover and activities, you may need to register for VAT or PAYE with HM Revenue & Customs.

Once these steps are complete, your business is officially registered and ready to trade!

How much does business registration cost

For many businesses, especially those starting from scratch, setting up as a sole trader or simple partnership doesn’t cost anything at all.

For a limited company, you’ll need to register with Companies House, which typically costs £12 for online applications (or more if you use an agent or require same-day processing). So while it does cost money, in the grand scheme of business expenses, the expense is minimal.

Registering for VAT

Value Added Tax (VAT) is a consumption tax that certain businesses must charge on goods and services. You’re required to register for VAT with HM Revenue & Customs if your taxable turnover exceeds the current threshold (typically £85,000 over a 12-month period). If you’re not sure whether or not you’ll hit that threshold, you can get VAT registered when you’re below the £85,000 mark anyway and cover your bases (which at least takes it off your mind).

Registering for VAT allows you to reclaim VAT on eligible business expenses, but also means you’ll need to charge VAT on your sales and submit regular VAT returns. You can register online through the HMRC website. Once registered, you’ll receive a VAT number and must then start keeping accurate digital records and submitting your returns electronically.

Registering a UK Business: It's Not as Hard as You’d Think

Now you’ve read all about the steps involved in business registration, and the options that a business owner has, to become a sole trader or limited business owner, you can see there’s not too much involved. With a little admin work, and usually either no or very little expense, you can become a business owner.

Once you’re done with all that, you can start moving ahead with your business plan: finding a premises, inventory, staff, and a POS system that can become the foundation of your business.

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