Sole Trader vs Limited Company

Operating as a sole trader is the simplest form of business in the UK. You are self-employed, running a business in your own name (or a trading name). There are no company formation fees and minimal ongoing administration beyond self-assessment tax returns and National Insurance contributions.

Advantages:

• Simple and cheap to set up — just register with HMRC by 5 October in your second year of trading
• Minimal ongoing compliance — one self-assessment return per year
• Full control over the business — no shareholders or directors to consult
• Losses can be offset against other income

Disadvantages:

• Unlimited personal liability: If the business cannot pay its debts, your personal assets (savings, car, home) are at risk
• Can be seen as less professional or less established than a limited company by some clients
• All profits are subject to income tax and Class 4 NI — there is no scope to leave profits in the business at a lower rate
• The business cannot survive the owner's death — it ceases with you

To set up as a sole trader, register for Self Assessment with HMRC as soon as you start trading. You must keep basic business records and file a tax return each year.

A private limited company (Ltd) is a separate legal entity from its owners. It can own assets, enter contracts, and incur debts in its own name. The financial liability of shareholders is limited to the nominal value of their shares — typically £1 per share.

Advantages:

• Limited liability: Your personal assets are protected from business debts (unless you have given personal guarantees)
• Tax efficiency: corporation tax (25% for profits over £250,000, 19% for small profits under £50,000, with marginal relief between) is often lower than income tax rates on comparable sole trader profits once the business grows
• Ability to pay a low salary and take dividends (taxed at lower rates than income) — though the dividend allowance is £500 (2025/26)
• Greater credibility and ease of investment or sale

Disadvantages:

• More complex and costly to run — annual accounts, Confirmation Statement, Corporation Tax return
• Company information including accounts and directors are publicly available at Companies House
• Accessing company profits requires salary or dividends — you cannot simply take money from the business
• Higher accountancy fees

To form a limited company, register with Companies House online — this costs £50 and can be done in a matter of hours. You will also need to register the company for Corporation Tax within three months of starting to trade.

The tax position depends heavily on the level of profit, how you want to extract money from the business, and your other income. For many small businesses with modest profits (say, under £30,000), sole trader status is simpler and the overall tax burden is similar or even lower than a limited company once accountancy costs are factored in.

At higher profit levels — particularly above £50,000 — a limited company can generate significant tax savings through the combination of:

• Corporation Tax (19–25%) on company profits, which is lower than higher-rate income tax (40%)
• Paying a small salary (up to the NI secondary threshold to avoid employer NI, typically around £9,100) and taking the rest as dividends
• Retaining profits in the company to be drawn down in future years, potentially at lower personal tax rates

However, the 2023 increase in Corporation Tax to 25% for profits above £250,000 has reduced (but not eliminated) the tax advantage for larger businesses. You should always seek advice from a qualified accountant before deciding which structure to use — individual circumstances vary significantly.

Many business owners start as sole traders and later incorporate (convert to a limited company) as their profits grow. Incorporation is straightforward in most cases:

• Register a new limited company at Companies House
• Transfer the business assets and any goodwill to the company (you can often do this under HMRC's incorporation relief to avoid immediate capital gains tax)
• Notify HMRC that you have ceased being self-employed and register the company for Corporation Tax and PAYE
• Update your contracts, bank accounts, and any licences to reflect the new legal entity

Some businesses — particularly tradespeople and freelancers — find that moving to a limited company is not worthwhile until they reach a certain profit threshold (often quoted as around £30,000 to £50,000 net profit). Taking advice from an accountant before making the switch is strongly recommended, as there can be tax implications on the transfer of certain assets, particularly property.