How to Register a Limited Company: A Step-by-Step Guide

Registering a limited company is one of the smartest things you can do as a business owner—but it's not some mysterious legal ordeal. It's a straightforward process that takes a few weeks, costs less than a decent laptop, and gives you personal liability protection, tax flexibility, and enough credibility to land clients who think "sole trader" means working from a garden shed.

This guide walks you through each step so you know exactly what to expect and what paperwork actually matters.

Why register a limited company instead of staying solo?

First, the obvious one: liability. If you're trading as a sole trader and your business gets sued, creditors can come after your personal assets. Limited company? The company takes the legal hit, and your personal stuff is protected (within reason—you're still liable for fraud and misconduct).

Then there's tax. Corporation tax is usually lower than the higher rates of income tax, and you get to decide how and when you draw money out—salary, dividends, a mix, whatever makes sense. A sole trader can't do that. For most businesses turning over £50k+, incorporation starts to make real financial sense.

There's also the credibility factor. Larger companies, councils, and public sector bodies often prefer to work with limited companies. They've got more confidence in your staying power. (Is this fair? Not really. But it's real.)

If you're trying to decide whether incorporation is right for you, check our guide on sole trader vs limited company—it walks through the numbers and helps you figure out your break-even point.

Choose a company name (and actually check it exists)

Your company name has to be unique on the register. Sounds obvious, but you'd be surprised how many people fall in love with a name, spend weeks branding around it, then find out it's already taken.

Check availability through Companies House before you get attached. It takes two minutes and saves you a lot of frustration.

A few restrictions: you can't use words like "Royal," "Authority," or "British" without special permission. Words that imply a link to government or professional bodies are flagged too. (This is why you see so many businesses with "Ltd" wedged awkwardly into their name—it's often the only bit left that doesn't trigger a restriction.)

Keep it short, memorable, and honest about what you do. "Smith Plumbing Ltd" beats "Smith's Comprehensive Residential Water Management Solutions" by miles.

Decide on your share structure

For most small businesses, you'll register as a private company limited by shares. This is standard—it's how nearly every small business is set up.

You need to decide:

Number of shares. The common starting point is 100 shares at £1 each. Simple, leaves room for bringing in partners or investors later without it getting messy.
Who holds them. Solo founder? You own 100%. Two partners splitting it 60/40? Adjust accordingly. This is straightforward stuff.
Who's the director. Every company needs at least one director. That's probably you. The director runs the business day-to-day and has legal duties to act in the company's interests (no using company money to pay for your holiday, basically).

Prepare your registered office address

Every limited company needs a registered office—the official address where legal mail and government letters get sent.

It doesn't have to be where you actually work. Use your home address, your accountant's office, or a virtual office service. The only requirement is that it has to be a physical address in the same country where you're registering. (You can't use "the internet" or a PO box.)

One thing to know: your registered office address is publicly available. If you're working from home and don't want your home address on the public register, a virtual office address is worth the £10–20/month. It's not paranoia—it's sensible privacy.

Write your articles of association

The articles of association are basically the rulebook for your company. They cover how decisions get made, how shares can be transferred, what happens if a director leaves, that sort of thing.

Most jurisdictions have model articles—a standard template that works fine for the vast majority of small businesses. Unless you're doing something unusual (complex investor arrangements, multiple share classes, that kind of thing), the model articles will be fine.

If you need something custom, get legal advice to make sure you're covering your specific situation. It's cheaper to get it right the first time than to amend articles later.

Register with Companies House

With your name, structure, address, and articles ready, you're set to register.

In the UK, you can register online with Companies House for £50—less than the cost of business lunch. You submit:

Company name
Registered office address
Director and shareholder details
Share structure
Articles of association
A statement of compliance (basically: "I've checked everything, it's all accurate, please register us")

You'll usually get confirmation within 24 hours. Seriously, faster than some restaurant reservations.

Register for tax—corporation tax, VAT, payroll

Once you're incorporated, you've got tax registrations to sort:

Corporation tax. Register with HMRC within three months of starting to trade. Miss this and you get penalties.
VAT. If your turnover hits the VAT threshold (currently £90k), registration is mandatory. Below that? Voluntary registration can still make sense if your clients are VAT-registered—they reclaim VAT from you, which makes you look better value.
Payroll. If you're paying yourself a salary or hiring anyone, register as an employer. HMRC will tell you what to do once you're on their system.

Doing these early means you're set up properly from day one. It's not fun, but it beats sorting it out six months later when you're behind on filings.

Open a business bank account

Your limited company needs its own bank account. This is both a legal requirement and a practical one—mixing personal and business money makes accounting a nightmare and raises red flags with HMRC if you're ever audited.

Most banks want your certificate of incorporation, director details, and shareholder info. Some online banks can set this up in days. Traditional banks take longer but might offer perks like free overdrafts or fee-free accounts for the first year.

Check out our guide on how to open a business bank account for a breakdown of what to expect from different providers.

Set up accounting from day one

From the moment you incorporate, you need to keep proper records. Income, expenses, receipts—all of it. It sounds tedious, but doing it properly from the start means you're not frantically reconstructing everything in December.

Spreadsheets work, but accounting software is worth the cost. Look for something that handles invoicing, expense tracking, bank feeds, and VAT returns. You want it all in one place so tax filing doesn't become a weekend of copy-pasting between systems.

Annual obligations—don't miss these dates

Running a limited company means annual paperwork:

Annual accounts. File financial statements with Companies House each year.
Confirmation statement. An annual update confirming your company details are current.
Corporation tax return. File this with HMRC within a set period after your financial year ends.
VAT returns. If registered, these are quarterly.

Miss a deadline and you get penalties. Set phone reminders, use a calendar app, or use software that tracks these dates for you. Seriously—this is worth automating.

Get business insurance before you start trading

Insurance isn't part of the registration process, but it should be sorted before your first day of trading:

Employers' liability. Legal requirement if you have employees.
Professional indemnity. Essential for service-based businesses—covers you if something you do (or advise) goes wrong.
Public liability. Important if clients or the public come to your premises.

Check out our guide to business insurance to figure out what you actually need (not just what insurers think sounds serious).

Common mistakes to avoid

Not checking your name is available. Just check Companies House. Takes two minutes.

Using your home address without thinking about privacy. It's public. If that matters to you, use a virtual office.

Mixing personal and business finances. Legal requirement, accounting nightmare, tax red flag. Don't do this.

Delaying tax registrations. Register within the deadline. Late fees aren't worth the "I'll do it next week" savings.

Not tracking income and expenses from day one. It's exponentially harder to reconstruct records six months later. Start tracking immediately.

Frequently Asked Questions

How long does it take to register a limited company? In the UK, about 24 hours once you've submitted everything to Companies House. Getting all your paperwork together beforehand usually takes a few days.

Can I register a limited company online? Yes. Companies House lets you register entirely online in the UK.

Do I need a solicitor to register a limited company? No. For a straightforward private company with standard articles, you don't need legal help—just follow the steps and submit your application. If you have complex arrangements (multiple investors, unusual share structures, etc.), then yes, get advice.

What's the difference between a director and a shareholder? A shareholder owns part of the company (holds shares). A director runs it. You can be both. A shareholder who doesn't run the business (like a silent investor) is just a shareholder.

Can I register a limited company part-time while employed elsewhere? Yes. But check your employment contract—some employers restrict outside work. Once you're incorporated, you're self-employed for that business, even if it's small.

What happens if I don't file annual accounts? Companies House sends you reminders. If you ignore them, you get penalties and eventually the company can be struck off (dissolved). Then you lose all legal protection and can't trade. File them.

Can I change my company name after registering? Yes, but it involves paperwork and a small fee. Get the name right first time if you can.

How much does it cost to run a limited company? Costs include Companies House filing fees (£50–100 per year for accounts and confirmation statement), accounting software (£5–50/month), business bank account (free to £15/month), tax advice (varies widely), and insurance. Budget £1,000–2,000 per year for the basics, more if you hire an accountant.

The first 90 days matter

Registering the company is the start, not the finish line. The next three months are when you set up the systems and habits that either run smoothly or haunt you all year. Open that bank account, get your accounting sorted, file your tax registrations, and sort your insurance. Our guide on the first 90 days of starting a business covers the full checklist.

Once you've got your foundations right, the business side of running a company becomes routine rather than overwhelming. Set up your accounting properly from day one, automate your tax deadlines, and you'll spend far less time on admin and far more time actually building something.