What Is a Limited Company? Simple Explanation, Tax & Requirements

If you’re starting a business in the UK or Ireland, the legal structure you choose matters more than you might think. More than 5.6 million limited companies are registered in the UK, and the reason isn’t just prestige: a limited company creates a legal wall between your personal assets and your business debts. Here’s what that means in practice for entrepreneurs on both sides of the Irish Sea.

Limited companies registered in the UK (2024): 5.6 million · Percentage of UK businesses that are limited companies: 68% · UK corporation tax rate (2025/26): 19% to 25% · Minimum number of directors (UK): 1 · Minimum number of shareholders (UK): 1

Seven key figures define a limited company, from liability cap to filing obligations:

What does it mean to be a limited company?

Limited liability explained

• Shareholder liability is capped at the value of unpaid shares or the guarantee amount (Anna Money (business banking provider)).
• Personal assets (house, car, savings) are protected from company debts.

This means if the company goes under, creditors cannot come after your personal belongings. You only lose what you invested in the business.

Separate legal entity status

• The company can own property, sign contracts, and be sued in its own name (Your Company Formations (UK formation specialists)).
• It continues to exist even if shareholders change.

The implication: a limited company is its own legal person. You and the business are not the same in the eyes of the law.

What is a limited company in simple terms?

Quick analogy for beginners

• Think of a limited company as a separate legal “container” for your business activities.
• You put money into the container (shares), and the container operates, owns assets, and owes debts. Your personal wallet stays outside.

This is why the word “limited” matters: your liability is limited to what you put in.

Key differences from sole trader

• A sole trader is the business – there is no separation (Rapid Formations).
• Limited companies pay corporation tax on profits and can pay dividends to shareholders.

The trade-off: you get legal protection and tax planning options, but also more paperwork and public disclosure.

What is a limited company in Ireland?

Irish private limited company (LTD) requirements

• Minimum one director plus a separate company secretary for a private limited company (CRO (Irish Companies Registration Office)).
• Must have a registered office address in Ireland.
• Corporation tax rate on trading income is 12.5%, non-trading income 25%.

Registration with the Companies Registration Office (CRO)

• Register online via CRO, fees €50–€100.
• Need company name (must end in “Limited”), constitution, director and secretary details.
• Receive Certificate of Incorporation – company is legally formed.

The pattern: Ireland offers a lower headline corporation tax rate (12.5%) but adds the requirement for a separate secretary, which is not needed in the UK.

Advantages and disadvantages of limited companies

Benefits of a limited company

• Limited liability protects personal assets (Anna Money).
• Tax efficiency through salary and dividends – dividend tax rates are lower than income tax (10.75% basic band vs 20%) (HMRC (UK tax authority)).
• Easier to raise investment and sell shares.

Drawbacks to consider

• Higher administrative burden: annual accounts, confirmation statement, corporation tax return (Rapid Formations).
• Public disclosure of finances – anyone can view your accounts on Companies House.
• More complex payroll and dividend paperwork.

What this means: limited companies suit businesses with steady profits above £30,000–£40,000 and a willingness to manage compliance.

How much tax does a UK limited company pay in 2026?

Corporation tax rates for 2025/26

• Small profits rate: 19% for profits up to £50,000 (HMRC).
• Main rate: 25% for profits over £250,000. Marginal relief applies between £50,001 and £250,000.

Dividend tax and personal tax implications

• Dividend allowance: £500 (2025/26) – first £500 of dividends tax-free.
• Rates: basic rate 8.75%, higher rate 33.75%, additional rate 39.35% (2025/26, HMRC).

The pattern: you pay corporation tax first, then personal tax on dividends. Total effective tax on profits can range from ~25% (basic taxpayer) to ~50% (additional rate).

How many directors are needed for a limited company?

UK minimum directors requirement

• Minimum one director (natural person or corporate) (Companies House).
• No separate company secretary required for private companies.

Ireland minimum directors requirement

• Minimum one director, plus a separate company secretary (CRO).
• The director and secretary can be the same person only if there are two directors? Actually for a single-director company, the secretary must be a different person.

Why this matters: in Ireland, you need to appoint a secretary from day one. In the UK, you can skip the secretary and keep things simpler.

What is a limited company vs sole trader?

Two business structures, three key differences. The table below lays them out side by side.

The trade-off: limited companies offer liability protection and tax planning, but sole traders enjoy simplicity and privacy.

The implication: choosing between them depends on your risk tolerance and administrative capacity.

How to register a limited company in the UK and Ireland

1. Choose a company name – must end in “Limited” or “Ltd” (UK) or “Limited” (Ireland) and not be identical to an existing name. Check availability on Companies House or CRO.
2. Prepare documents: Memorandum and Articles of Association (UK) or Constitution (Ireland).
3. Provide registered office address (must be physical location in the country of registration).
4. Appoint at least one director (and secretary in Ireland).
5. Determine share structure: number of shares, type (ordinary, preference), and subscribers.
6. Submit application online: Companies House (UK) – £12 standard fee; CRO (Ireland) – €50–€100 depending on service.
7. Receive Certificate of Incorporation – company is legally formed.
8. Register for corporation tax (within 3 months of trading) and VAT if turnover exceeds £85,000 (UK) or €75,000 (Ireland).

The implication: registration can be done in 24 hours online. But the real work starts after – payroll setup, bank account, and annual filings.

What’s clear and what’s not

Confirmed facts

• Limited companies have separate legal personality – established by case law and the Companies Act 2006.
• UK corporation tax rates for 2025/26 are fixed at 19% (small profits) and 25% (main rate) per HMRC.
• Ireland requires at least one director and a secretary for a private limited company, per the Companies Act 2014.

What’s unclear

• Future dividend allowance beyond 2025/26 – currently £500, but the government may reduce it further.
• Impact of potential UK budget changes on limited company taxation – especially in light of the economic crime register and digital reporting requirements.

“A company formed and registered under this Act is a body corporate … capable of exercising all the functions of an incorporated company.”

Companies Act 2006, Section 16 (UK primary legislation)

“Every company shall have at least one director and, if it is a private limited company, at least one secretary.”

Companies Registration Office Ireland (Irish government registry)

For anyone starting a business in the UK, the choice between a limited company and sole tradership comes down to risk appetite and administrative willingness. If you want to protect personal assets and can handle the filing obligations, incorporation is a smart move. Otherwise, sole tradership keeps things simpler. For Irish entrepreneurs, the requirement for a separate secretary adds a small hurdle, but the 12.5% corporation tax rate remains a strong draw. The decision is clear: know your profit trajectory, your tolerance for paperwork, and your need for liability protection – then choose accordingly.

Related reading: UK Limited Company: Definition, Advantages, Disadvantages, and Tax Treatment

For a straightforward overview of the structure and legal implications, see this definition of a limited company that breaks down the key features for UK entrepreneurs.

Frequently asked questions