How to register a limited company in the UK: step by step

Starting your first limited company can feel overwhelming. You know you need to register with Companies House, but where do you actually begin? What information do you need, and what choices will affect your business for years to come?

The good news is that the process to register a limited company in the UK is straightforward once you understand the steps. You can complete the entire process online, and your company can be ready to trade within 24 hours in most cases.

This guide walks you through exactly how to form a limited company, from choosing your company name to completing your Companies House registration. We'll cover the key decisions you need to make about directors, shares, and your registered office address. Plus, we'll highlight the most common mistakes that trip up first-time company founders so you can avoid them entirely.

By the end of this post, you'll have everything you need to incorporate your company UK with confidence.

Before you start: key decisions and information you'll need

Before you begin the companies house registration process, gather the essential information and make some fundamental decisions about your company structure.

First, you'll need personal details for all directors and shareholders. This includes full names, dates of birth, addresses, and nationalities. Directors must be at least 16 years old, and every company needs at least one director who is a natural person (not another company).

Next, decide on your share structure. Most small companies start with ordinary shares at £1 each, but you can choose any value. You'll need to decide how many shares to issue and who owns them. A typical setup might be 100 shares at £1 each, giving you flexibility for future investment.

Choose your Standard Industrial Classification (SIC) codes. These tell HMRC and Companies House what your business does. You can select up to four codes, and it's worth choosing broadly to give yourself room to grow.

Finally, you'll need a registered office address in the country where you're incorporating (England and Wales, Scotland, or Northern Ireland). This address appears on public records and receives official correspondence. It cannot be a PO Box, and someone must be available during business hours to receive mail.

Choosing your company name and checking availability

Your company name is one of the most important decisions you'll make. It needs to be unique, comply with naming rules, and work for your brand long-term.

Start by checking name availability using the Companies House WebCHeck service. Your name cannot be identical to an existing company, and it cannot be too similar if it might confuse the public. Remember that company names are case-insensitive, so "ABC Ltd" and "abc ltd" are considered the same.

Your company name must end with "Limited" or "Ltd" for private limited companies. You cannot use certain restricted words without permission, including "Royal," "British," "Government," or "University." Some words like "Bank" or "Insurance" require regulatory approval.

Avoid names that might infringe trademarks, even if they pass the Companies House check. A trademark owner could force you to change your name later, which involves paperwork and costs. Check the UK Intellectual Property Office database for potential conflicts.

Consider how your name works practically. Is it easy to spell over the phone? Does the domain name work for your website? Will it translate well if you expand internationally? These factors matter more than you might think in your day-to-day operations.

Setting up directors, shareholders and company structure

Every limited company needs at least one director and one shareholder (who can be the same person). Getting this structure right from the start saves complications later.

Directors have legal responsibilities including filing annual returns, maintaining company records, and acting in the company's best interests. You can appoint directors during incorporation or add them later. Each director needs to provide their full name, date of birth, nationality, occupation, and service address.

Shareholders own the company through their shares. Decide whether you want equal ownership or different shareholding percentages. If you have business partners, consider what happens if someone wants to leave. You might want a shareholders' agreement, though this isn't required for incorporation.

Choose your share capital carefully. Many companies start with £100 share capital (100 shares at £1 each), which is affordable and provides flexibility. You can issue different classes of shares with different rights, but ordinary shares work fine for most small companies.

Don't forget about the People with Significant Control (PSC) register. Anyone who owns more than 25% of shares or voting rights must be recorded. This information becomes public, so consider the privacy implications when structuring ownership.

Think about future needs too. Will you want to bring in investors? Might you need employee share options? While you can change your structure later, planning ahead makes life easier.

Completing your Companies House registration

The actual incorporation process happens online through the Companies House WebFiling service. You'll need to complete form IN01, which captures all your company information in one place.

Start by creating your Companies House WebFiling account if you don't already have one. You'll need an email address and will create a password. This account lets you file documents and track your application progress.

Complete the IN01 form with your company details. Enter your chosen company name, registered office address, SIC codes, share capital, and director information. Double-check everything carefully - mistakes can delay your application or require costly corrections later.

Pay the incorporation fee online. The standard fee is £12 for online applications, or you can pay £100 for same-day incorporation if you need your company registered urgently. Payment is by debit or credit card through the secure portal.

Once submitted, you'll receive an acknowledgement email. Standard applications usually complete within 24 hours on working days. You'll receive your Certificate of Incorporation by email, which proves your company legally exists. This certificate includes your company number, which you'll need for banking and other services.

After incorporation, you have immediate obligations including appointing an accountant, setting up business bank accounts, and registering for Corporation Tax within three months.

How Basely Virtual helps

One of the biggest challenges when you register a limited company UK is finding a suitable registered office address. Your home address becomes public record, which many business owners prefer to avoid for privacy and security reasons.

Basely Virtual provides professional UK registered office addresses from £6.99 per month. Your mail gets scanned and forwarded digitally the same day it arrives, so you never miss important correspondence from Companies House or HMRC. The service includes automatic compliance monitoring to ensure your address stays valid.

For businesses wanting a prestigious London address, Professional plans start from £22.99 monthly and include additional services like Digital Business Cards with verified badges. All addresses are fully compliant with Companies House requirements and staffed during business hours.

The process integrates seamlessly with company formation. You can use your Basely Virtual address during incorporation, then manage all your business correspondence through the online portal. This keeps your personal address private while ensuring you meet all legal obligations.

You can start with a 14-day free trial at baselyvirtual.co.uk with no card required.

Conclusion

Registering a limited company in the UK is simpler than many people expect, but getting the details right matters. Take time to choose your company name carefully, think through your share structure, and gather all required information before starting your application.

The most successful incorporations happen when founders plan ahead and understand their ongoing obligations. Remember that forming your company is just the beginning - you'll need to maintain proper records, file annual returns, and comply with various regulations.

Your next step is straightforward: gather your information, check your chosen company name, and complete your Companies House registration online. Most applications complete within 24 hours, so you could be trading under your new limited company by tomorrow.