The main advantages of a private limited company are limited liability, a separate legal identity that outlives its owners, corporation tax at 19% to 25% on profits kept in the business, and an easy way to share ownership through shares. The main disadvantages are public disclosure on the Companies House register, ongoing filing and fees, directors' legal duties, and a second layer of tax when profits are paid out. In 2026/27 dividends are taxed at 10.75% in the basic band and 35.75% in the higher band. Whether the trade-off is worth it depends far more on what you do with the profit than on the structure itself.
What a private limited company is
A private limited company is a company registered at Companies House whose shareholders' liability is limited. In GOV.UK's words, it is "legally separate from the people who own it". It needs at least one director, who must be a natural person aged 16 or over, and at least one shareholder, who can be the same person. Its name must end in "Limited" or "Ltd" (or the Welsh equivalents). "Private" means it cannot offer its shares to the public. Section 755 of the Companies Act 2006 prohibits a private company from offering its securities to the public. That is the key legal difference from a plc.
Advantages
- Limited liability. Owners are responsible for the company's debts "only up to the value of their financial investment". If the company fails, its creditors generally cannot pursue the shareholders' personal assets. The exceptions are personal guarantees, which lenders and landlords often ask for, and director misconduct;
- Separate legal person. The company owns its assets, signs its own contracts and can sue and be sued. It continues when shareholders or directors change, so the business can be sold, inherited or passed on by transferring shares rather than individual assets;
- Corporation tax on retained profit. Profits are taxed at 19% up to £50,000 and 25% above £250,000, with marginal relief in between (see corporation tax rates). Profit you do not need personally stays in the company at those rates instead of being taxed at income tax rates of up to 45%;
- Flexible ownership. Shares let you bring in co-founders, employees or investors in defined proportions, and different share classes can carry different rights. Tax-advantaged share schemes and investor reliefs are built around companies;
- Pension and remuneration planning. Employer pension contributions are a business expense and are not treated as earnings for Class 1 National Insurance. A director's mix of salary and dividends can be set each year;
- Credibility. Some larger customers and public bodies will only contract with incorporated suppliers, and lenders are used to dealing with them.
Disadvantages
- Everything is on the public record. Annual accounts, the names of directors and people with significant control, the registered office and the share capital all go on the Companies House register, where anyone can look them up free of charge. Directors' home addresses stay on a private register if they give a separate service address;
- Filing obligations with fixed deadlines. Accounts are due at Companies House nine months after the year end. The Company Tax Return is due 12 months after the accounting period ends, and corporation tax is payable nine months and one day after it. A confirmation statement is due every year;
- Penalties bite quickly. For returns due on or after 1 April 2026, a late Company Tax Return incurs a £200 penalty, with another £200 at three months. The amounts rise to £1,000 each if the return is late three times in a row. Late accounts carry their own Companies House penalties;
- Costs. Incorporation costs £100 online and each confirmation statement £50 online (fees from 1 February 2026). On top of that come accountancy fees, and audit fees once the company no longer qualifies as small. To qualify as small, a company must meet two of three tests: turnover of £15 million or less, a balance sheet of £7.5 million or less, and 50 employees or fewer;
- Double taxation on extraction. Money paid out as dividends has already borne corporation tax and is taxed again above the £500 dividend allowance. At higher levels of profit, a director who withdraws everything can end up paying more overall than a sole trader would;
- The money is not yours. Company funds can reach you as salary, dividends or a loan, each with its own rules. A director's loan not repaid within nine months of the year end triggers a section 455 charge of 35.75% on loans made from 6 April 2026 (see section 455 explained);
- Directors' duties and identity checks. Directors owe the company seven statutory general duties and can be disqualified for up to 15 years for unfit conduct. Since 18 November 2025, directors and people with significant control must verify their identity with Companies House (existing directors by the company's next confirmation statement).
Advantages and disadvantages at a glance
| Feature | Advantage | Disadvantage |
|---|---|---|
| Liability | Limited to your investment | Personal guarantees often required anyway |
| Tax | 19%–25% on profit kept in the company | Dividend tax of 10.75%–39.35% on profit taken out |
| Privacy | Directors' home addresses are kept on a private register | Accounts, officers and owners are public |
| Admin | Clear structure for investors and succession | Accounts, CT600, confirmation statement, payroll |
| Ownership | Shares are easy to issue and transfer | Cannot offer shares to the public |
When the advantages outweigh the drawbacks
A private limited company usually makes sense where at least one of these applies: profits exceed what the owners need to live on, so retained profit benefits from corporation tax rates; the business carries real liability risk; there are, or will be, several owners or outside investors; or customers expect to contract with a company. It tends to be the wrong choice for a modest business whose owner draws every pound. That owner takes on the cost and disclosure of a company, and the April 2026 dividend rate rises have removed most of the tax saving on fully extracted profit. Our sole trader vs limited company guide works through the numbers.
The disadvantages are mostly administrative, and administration can be bought in. The harder questions are about extraction policy, pensions and ownership, and they deserve proper modelling before you incorporate. Acumon sets up companies through our company formation service and runs year-round compliance through our accountants for limited companies team.