How To Set Up A Company In The UK?

By Simply Accounts on Apr 9, 2026 10:00:00 AM

Starting a new business venture is an exciting milestone, but the administrative side can often feel daunting. Whether you are turning a side hustle into a full-time career or launching a completely new idea, understanding the logistics of incorporation is vital. Knowing how to set up a company in the UK correctly from day one ensures you have a solid foundation for growth and stay on the right side of the law.

The process is designed to be efficient, but it requires attention to detail. By following a structured path, you can move from a concept to a legally recognised business entity quickly, allowing you to focus on what matters most: serving your customers and building your brand.

Choose Your Company Type And Name

The first step is deciding on your legal structure. Most small businesses and entrepreneurs register as a private limited company. This offers limited liability, meaning your personal assets are generally protected if the business faces financial trouble.

Other options include sole trader status or partnerships, but limited companies provide stronger protection and appear more professional to clients and suppliers.

Once you've settled on structure, you need a unique name. This is where creativity meets compliance. Your chosen name must not be the same as or too similar to an existing company on the register.

Check availability on the Companies House register before committing to branding or domain names. Your name is your identity, but it must meet legal requirements to be accepted.

Avoid names that:

• Are identical or too similar to existing registered companies
• Include sensitive words like "Royal" or "Government" without permission
• Could be considered offensive

Choose something memorable that reflects your business and allows room for growth. You don't want to outgrow your name in two years.

Register With Companies House

With your name and structure decided, the next phase is formal registration. File incorporation documents with Companies House, providing specific details about people and location.

You'll need to appoint at least one director (who must be at least 16 years old). You'll also identify shareholders—the people who own the company. In many small businesses, directors and shareholders are the same people.

You need a registered office address, the official address where HMRC and Companies House send statutory mail. This must be a physical UK address, not a PO Box. Many people use their accountant's address to keep their home address private.

Most people register online. The digital application is straightforward and usually processed within 24 hours. The cost of incorporation is typically £100 (VAT exempt) for online company registration, or £124 for paper registration.

Gathering these details early avoids delays during application. You'll need:

• Company name
• Registered office address
• At least one director's details (name, address, date of birth)
• At least one shareholder and their shareholding
• Details of shares (how many and what value)
• Standard articles of association (or customised ones)

Obtain Your Registration Number And Certificate

Approval from Companies House is a significant milestone. Once your application is accepted, you'll receive your Certificate of Incorporation. This is essentially your business's birth certificate, confirming the company legally exists as its own entity.

You'll also receive a Company Registration Number (CRN). You'll need this for many official tasks, opening a business bank account, applying for permits, or signing commercial leases.

Keep these documents safe. They're the primary proof of your business's legal standing. Store digital and physical copies securely, as you'll reference them regularly.

Register For Corporation Tax With HMRC

Setting up with Companies House is only half the legal requirement. Once your company is active, you must inform HMRC. Register for Corporation Tax within three months of starting to trade.

"Starting to trade" means when you begin any business activity—buying stock, advertising, or receiving income. It's not just when you make your first sale.

HMRC will send you a Unique Taxpayer Reference (UTR) for the company. This ten-digit code is separate from your personal tax details and is used for all business tax filings.

Missing this deadline triggers automatic penalties, so set a reminder immediately after incorporation. The registration process is done online through the HMRC website and takes about 15 minutes.

Additional Steps To Consider

While not legally required immediately, these steps help your business run smoothly:

Open A Business Bank Account: Keep personal and business finances separate. Most banks require your Certificate of Incorporation and proof of address.

Register For VAT: If your turnover exceeds £90,000 (as of 2026), you must register for VAT. You can also register voluntarily if it benefits your business.

Set Up PAYE: If you're employing staff or paying yourself a salary, you need to register as an employer with HMRC.

Get Business Insurance: While not always legally required, professional indemnity and public liability insurance protect you from potential claims.

Consider A Business Bank Account: Separating personal and business finances makes accounting much simpler and looks more professional.

How Simply Accounts Can Help

Incorporating involves more than filling out forms. It's about setting a trajectory for long-term success. While steps seem simple, the implications for future tax position and legal liability are significant.

Simply Accounts can handle the entire process for you. We guide you through each registration, ensuring all filings are accurate. We don't just stop at incorporation, we set up your accounting systems from the start, giving you clear visibility of your numbers from day one.

By letting us manage the administrative burden, you can focus your energy on getting your business off the ground and pursuing your goals with confidence, and when you choose one of our packages, you may even qualify for free company incorporation.

Talk To Simply Accounts About Your Next Steps

Ready to turn your business idea into legal reality? We're here to help. We provide simple, practical support to ensure your company is set up correctly and remains compliant as it grows.

Get in touch with Simply Accounts today to discuss your new venture and build a strong financial foundation for your business.

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