Forming a Limited Company: Steps, Costs, Compliance

Thinking about setting up a limited company? The process can open up tax advantages, limit your liability, and give your business a more professional image—but it’s also packed with legal responsibilities and ongoing costs. This guide walks you step-by-step through forming a UK limited company, how much it really costs, and what you must do to stay on the right side of Companies House and HMRC. Read on for practical, honest advice that goes well beyond the basics.

A limited company is a distinct legal entity, separate from its owners and directors. In the UK, the most common type for small businesses is a private company limited by shares (Ltd), where liability is limited to the value of shares held. There are also companies limited by guarantee, typically used for non-profits. Choosing this structure affects everything from your tax position and personal risk to the image you present to partners and clients. See our guide on Pros and Cons of UK Legal Structures for more details.

Operating as a limited company offers several advantages—most notably, it protects your personal assets if the business faces debts or legal claims. Unlike sole traders, where you and the business are legally the same, a limited company’s finances and liabilities are kept distinct. However, this comes with extra admin, transparency, and compliance requirements. You’ll need to file annual accounts, returns, and keep detailed records.

Forming a limited company can also be tax-efficient, especially as your profits grow. Corporation tax is currently 25% for profits above £250,000 and 19% for small profits under £50,000, with a marginal rate in between. Directors can pay themselves a mix of salary and dividends, which may reduce their overall tax and National Insurance burden compared to the self-employed route. However, this depends on your circumstances, and there are running costs to consider.

• Personal liability protection for directors and shareholders
• Tax planning opportunities, including dividends
• More complex reporting and filing requirements
• Enhanced credibility with suppliers, banks, and clients
• Access to different funding options (including equity investment)

Forming a company in the UK is a relatively straightforward process, but it pays to get the details right from the start. Companies House, the UK’s official registrar, handles the incorporation process. You can form a company online, by post, or using a formation agent. The online process is quickest—most companies are registered within 24 hours. For a step-by-step overview, see How to Incorporate a Limited Company via Companies House.

The key steps involve choosing a unique company name, deciding on directors and shareholders, preparing key documents (memorandum and articles of association), and submitting your application with the correct fee. You’ll need a registered office address in the UK (not a PO box), and must provide details for at least one director and one shareholder (these can be the same person for a single-person company).

You must also decide on the share structure—how many shares to issue, their value, and who owns them. Even if you’re the only shareholder, you must record these details. The articles of association set out how the company will be run; you can use the default ‘model’ articles, or tailor your own if you have specific requirements.

• Company name must end with 'Limited' or 'Ltd'
• Directors and PSCs (People with Significant Control) are publicly listed
• Registered office address and service address are published online
• Shareholders can be individuals or other companies

The headline cost of forming a limited company is low—just £12 if you do it yourself online. But this is only the start. The real costs come from ongoing compliance, accounting, and admin. HMRC and Companies House both have annual reporting requirements, and you’re legally obliged to keep proper records and file accounts.

Most small companies will also want an accountant, at least for year-end accounts and corporation tax returns. Expect to pay anywhere from £600 to £2,000 per year for a basic package, depending on transaction volume and complexity. If you’re VAT registered (required if turnover exceeds £90,000 as of 2026), expect extra fees. Formation agents can provide address services, mail forwarding, and secretarial support for ongoing monthly or annual charges.

Other costs to factor in include business insurance (public liability, professional indemnity), payroll software if you employ staff (or pay yourself a salary), and possibly a business bank account (most banks charge monthly fees). HMRC can fine you for late or incorrect returns, and Companies House charges £13 for annual confirmation statements (or £40 by post).

• Accountancy is the biggest hidden cost—don’t skimp if you want to sleep at night
• Most banks now require proof of ID and address for all directors and PSCs
• Confirmation statement is due every 12 months, regardless of trading activity
• Late accounts or returns trigger automatic penalties from Companies House and HMRC

As a company director, you take on strict legal duties under the Companies Act 2006. These include acting in the company’s best interests, keeping accurate records, and ensuring all filings are correct and on time. Directors are personally responsible for ensuring compliance—even if you use an accountant or agent.

Annual requirements include preparing and filing statutory accounts, a confirmation statement (which updates Companies House on your company’s structure and details), and a corporation tax return to HMRC. You must also keep registers of directors, shareholders, and people with significant control (PSC), which must be available for public inspection at the registered office.

Failing to comply can have serious consequences. Companies House and HMRC can issue fines, strike your company off the register, or in serious cases disqualify directors. You must also keep your company data up to date—change of address, directors, or shareholdings must be notified promptly. Ignorance is not a defence; as a director, you are expected to know your obligations.

• File annual accounts within 9 months of year-end
• Pay corporation tax within 9 months and 1 day of year-end
• Maintain accurate company registers and make them available
• Report changes to directors, PSCs, or address within 14 days
• Submit a confirmation statement every 12 months

A limited company pays corporation tax on its taxable profits. As of April 2023, the main rate is 25% for profits over £250,000, with a small profits rate of 19% for profits up to £50,000, and a marginal rate for profits between these bands. You must register for corporation tax with HMRC within three months of starting to trade, even if you’ve already registered the company at Companies House.

If your VAT-taxable turnover exceeds £90,000 (2026/27 threshold), you must register for VAT. This adds complexity—quarterly returns, digital record-keeping under Making Tax Digital, and potential cash flow implications. Some businesses benefit from VAT registration even below the threshold, but this depends on your customers and suppliers. VAT errors are a common source of penalties, so get advice if unsure.

Directors and employees are taxed on salaries via PAYE, and the company must operate payroll and report to HMRC in real time. Dividends paid to shareholders have their own tax regime—after the first £500 tax-free (2026/27), basic rate is 8.75%, higher rate 33.75%, and additional rate 39.35%. You must keep minutes declaring dividends, and only pay them from distributable profits.

• Register for corporation tax with HMRC as soon as you start trading
• Keep digital records for VAT if registered—required by law under Making Tax Digital
• Don’t mix up directors’ loans, salary, and dividends—each has specific rules
• Late tax returns or payments attract penalties and interest

Once your company is registered, you’ll need a business bank account. Most UK banks require your certificate of incorporation, memorandum and articles, and proof of ID/address for all directors and PSCs. Some online banks now offer speedy onboarding, but traditional banks can take several weeks due to anti-money laundering checks.

A separate account is not just best practice—it is essential for proper record-keeping. Mixing business and personal funds is one of the most common mistakes new company owners make. It can lead to messy accounts, tax issues, and could even pierce the corporate veil in court. Make all business payments and receipts via the company account, and keep clear records of expenses, salaries, and dividends.

Consider using cloud accounting software (like Xero, QuickBooks, or FreeAgent), which can automate much of the admin, generate compliant invoices, and link directly to your bank. Many accountants now require this as standard. For payroll, HMRC-recognised RTI-compliant software is mandatory if you pay any salary, even to yourself as a director.

• Shop around—different banks offer varying fees and features for business accounts
• Online-only banks (e.g., Tide, Starling, Monzo) can be faster but may have limits
• You’ll need all directors’ details—even if they’re not shareholders
• Set up cloud accounting early to avoid headaches at year-end
• Keep receipts and invoices for at least 6 years (HMRC requirement)

Many first-time company directors underestimate the admin burden of running a limited company. Filing accounts late, failing to update Companies House on changes, or muddling up your personal and company money are all frequent errors. These can lead to fines or, worse, having your company struck off the register.

It’s also a misconception that a limited company always saves you tax. For low profits (typically under £30,000), the extra costs of accountancy and admin can outweigh the benefits. If you’re unsure, get a breakdown from a professional before you commit. Remember, directors’ loan accounts must be carefully managed—taking money out of the company that isn’t salary or dividend can cause tax headaches and trigger S455 tax if not repaid promptly.

Another common mistake is treating the company as your alter ego. It is a separate legal entity, and you must act accordingly. Make sure contracts, insurance policies, and invoices are in the company’s name. Don’t use company funds for personal expenses—they could be treated as income and taxed accordingly. If you stop trading, you must go through the official process to close the company (strike off or liquidation), not just stop using it.

• Don’t ignore Companies House or HMRC correspondence—respond promptly
• Always keep statutory registers up to date (directors, PSCs, shareholders)
• Dividends can only be paid from profits—never from capital
• If in doubt about tax or legal issues, consult a qualified accountant

Choosing the right structure is a big decision. For some, a limited company is a natural fit—especially if you want to limit personal risk, raise investment, or present a professional image to clients. For others, especially those just starting out or with modest profits, the extra admin and cost may not be worthwhile. The shift from sole trader to limited company is not irreversible, but it is a legal process, so weigh up the pros and cons carefully.

Consider your growth plans, industry expectations, and appetite for paperwork. If you’re in a sector where clients expect to deal with companies (consultancy, contracting, tech), or you plan to employ staff or take on partners, a limited company may be a must. If you’re testing an idea or have a side hustle, starting as a sole trader is simpler and cheaper—you can always incorporate later. For more on this decision, see How to Decide if Business Ownership is Right for You.

Speak to an accountant before you commit. They can model your likely tax position, explain the hidden costs, and help you avoid rookie mistakes. The cost of advice is tiny compared to the pain of getting it wrong. Remember, forming a company is easy—running it properly is the hard part, but it’s entirely manageable with the right setup and support.

• Does your industry or client base expect you to be a limited company?
• Are you comfortable with public disclosure of your details and accounts?
• Do you want to bring in partners or external investors?
• Will your profits justify the extra admin and accountancy costs?
• Are you prepared to keep on top of deadlines and paperwork?