How to Register a Company with Companies House (Step-by-Step Guide for Beginners)

If you’re setting up a business in the UK, at some point, you’ll need to register a company, depending on your business and tax structure

That’s where Companies House comes in.

This is the government body responsible for:

• Registering companies
• Storing company information
• Making your business legally recognised

Without registering here, your limited company simply doesn’t exist in the eyes of the law.

Before You Start: Do You Actually Need to Register?

Not every business needs Companies House.

You only need to register if you’re creating a:

• Limited company (Ltd)

You do not need it if you’re:

• A sole trader
• A freelancer operating under your own name

However, many founders choose a limited company for:

• Credibility
• Liability protection
• Tax structure benefits

What You Need Before Registering

Before you start the process, prepare the following:

• A company name (must be unique)
• A registered office address (UK address)
• At least one director
• Details of shareholders
• Share structure (e.g. 1 share, 100 shares, etc.)
• SIC code (business activity classification)

Tip: Keep it simple Most small businesses start with:

• 1 Director
• 1 Shareholder
• 100% Ownership

Step-by-Step: How to Register Your Company

Step 1: Choose Your Company Name

Make sure your name:

• Is not already taken
• Doesn’t include restricted words
• Ends with Ltd or “Limited

Step 2: Register Online with Companies House

Go to the official website and complete the application.

You’ll need to:

• Enter company details
• Add directors and shareholders
• Confirm share structure

Cost: Typically £12 for online registration. Estimated Time: Usually within 24 hours

Step 3: Receive Your Certificate of Incorporation

Once approved, you’ll receive:

• Certificate of Incorporation
• Company number

This means your business is now legally formed

Step 4: Register with HMRC

After incorporation, you must register with HMRC for:

• Corporation Tax
• PAYE (if hiring employees)
• VAT (if applicable)

You’ll also receive your:

• UTR (Unique Taxpayer Reference)

Step 5: Open a Business Bank Account

To keep things clean and compliant:

• Separate personal and business finances
• Use a dedicated business account

What Happens After Registration?

This is where many new founders get it wrong. Registering your company is just the beginning.

You are now responsible for:

• Filing annual accounts with Companies House
• Submitting tax returns to HMRC
• Keeping accurate financial records
• Meeting deadlines

Miss these? You face penalties.

Common Mistakes to Avoid

1. Choosing a complicated share structure
2. Using your home address without understanding privacy
3. Ignoring HMRC registration
4. Not tracking income and expenses from day one

How to Stay Organised from Day One

This is where most businesses struggle, not with registering, but with managing what comes after.

To stay on top of things:

• Track your invoices and payments from the start
• Record all expenses properly
• Keep everything organised for tax time

This is where tools like BFSB help you:

• Create invoices and receive payment easily
• Track expenses in one place
• Stay ready for HMRC and filings

Final Thought

Registering a company in the UK is actually simple.

What’s hard is:

• Staying compliant
• Staying organised
• Staying consistent

Get the foundation right early, and everything else becomes easier.

Frequently Asked Questions (FAQ)

Do I need to register with Companies House as a sole trader?
No. Sole traders do not register with Companies House, only limited companies do.

How much does it cost to register a company in the UK?
It typically costs £12 if you register online directly.

How long does it take to register a company?
Most companies are registered within 24 hours.

What is a Certificate of Incorporation?
It’s an official document confirming your company legally exists.

Do I need to register with HMRC after Companies House?
Yes. You must register for Corporation Tax and other obligations depending on your business.

Can I register a company by myself?
Yes. Most small business owners complete the process themselves online.