Sole Trader vs Limited Company

The short answer

For most freelancers earning under £30,000–£35,000, being a sole trader is simpler and often just as tax-efficient. Above that, particularly once profits consistently exceed £50,000, a limited company can offer meaningful tax savings — but those savings come with significantly more admin and cost. This guide walks through both structures so you can make the decision with clear numbers rather than vague advice.

What is a sole trader?

A sole trader is the simplest business structure. You trade as an individual — your business and your personal finances are legally the same thing. You register with HMRC for Self Assessment, report your income and expenses, and pay Income Tax and National Insurance on your profits.

There is no separation between you and the business. If a client sues you and wins, your personal assets — your savings, your car, in extreme cases your home — are at risk. This is called unlimited liability.

Setting up as a sole trader costs nothing and takes about ten minutes. You register online with HMRC, start trading, and report through Self Assessment each year.

What is a limited company?

A limited company is a separate legal entity from you, its director. The company earns income, pays Corporation Tax on its profits, and can then distribute the remainder to you as dividends or salary. Your personal liability is limited to the value of your shares — typically £1 or £100 — hence the name.

Incorporating a company costs £50 online at Companies House and takes a few hours. However, the ongoing obligations are substantially heavier: annual accounts filed at Companies House, a Confirmation Statement each year, Corporation Tax returns, PAYE registration if you pay yourself a salary, and directors' responsibilities under the Companies Act.

The tax comparison

The tax efficiency argument for a limited company rests on one core strategy: pay yourself a small salary (up to the NIC threshold, usually around the Personal Allowance) and extract the rest as dividends. Dividends are taxed at lower rates than income from self-employment, and neither you nor the company pay National Insurance on dividends.

Sole trader tax — 2025/26

As a sole trader with £60,000 profit:

• Personal Allowance: £12,570 (tax-free)
• Basic rate (20%) on £37,700: £7,540
• Higher rate (40%) on £9,730: £3,892
• Class 4 NIC (6%) on £37,700: £2,262
• Class 4 NIC (2%) on £9,730: £195
• Total tax + NIC: approximately £13,889
• Take-home: approximately £46,111

Limited company tax — 2025/26

Through a limited company with £60,000 revenue (simplified, ignoring company costs):

• Pay yourself a salary of £12,570 (within Personal Allowance, no Income Tax; minimal NIC above £8,812 employer and employee threshold)
• Remaining profit: £47,430, subject to Corporation Tax at 19% (small profits rate for profits under £50,000): £9,012
• Post-tax profit available as dividends: £38,418
• Dividend Allowance (tax-free): £500
• Dividends taxed at basic rate (8.75%) on £37,918: £3,318
• Plus employer NIC on salary above the secondary threshold (approximately): £500
• Total tax: approximately £12,830
• Take-home: approximately £47,170

At £60,000, the difference is around £1,000 per year in favour of the limited company — before accounting for the extra cost of an accountant, which typically runs £1,000–£2,000 per year more than a sole trader accountant. At this income level, the financial case is marginal.

The saving grows significantly at higher profit levels, particularly once you reach the higher rate threshold, because more dividend income stays in the basic rate band (8.75%) rather than being taxed at 40%+ as self-employment income would be.

The breakeven point

As a rough rule of thumb, the limited company structure starts to show meaningful net savings (after accountancy costs) once your profits consistently exceed £50,000–£60,000 per year. Below this, the tax saving is often wiped out by additional accounting fees, Companies House filings, payroll administration, and your own time dealing with increased complexity.

Admin and compliance compared

Sole trader obligations

• Register with HMRC once
• One Self Assessment tax return per year
• Keep records for 5+ years
• VAT returns if registered (quarterly)
• Accountancy cost: typically £200–£600 per year (or self-file)

Limited company obligations

• Incorporate at Companies House
• Prepare annual statutory accounts (in a specific format)
• File accounts at Companies House (publicly visible)
• File a Corporation Tax return with HMRC
• Submit a Confirmation Statement annually (£34 fee)
• Run PAYE payroll for your own salary
• File a personal Self Assessment return as director
• VAT returns if registered
• Meet statutory director duties under the Companies Act
• Accountancy cost: typically £1,500–£3,000+ per year

The difference in admin time is substantial. Many freelancers find they spend four to six times more time on financial administration as a limited company director than as a sole trader.

Liability protection

Limited liability is a genuine advantage of incorporation. If your company is sued or goes into debt, your personal finances are protected beyond the nominal value of your shares. For sole traders, there is no such protection.

That said, the practical importance depends on what you do:

• Low-risk work (writing, design, administrative work): the risk of catastrophic liability is low. Professional Indemnity insurance provides substantial protection for sole traders at low cost
• Higher-risk work (engineering, safety-critical systems, financial advice, legal work): limited liability becomes more valuable and incorporation may make more sense even at lower income levels

Note: if you take personal guarantees on company loans or debts (common with small business finance), you effectively waive limited liability for those obligations.

Credibility and client perception

Some larger clients — particularly enterprise or public sector — prefer to contract with limited companies rather than individuals. This is partly administrative (purchase order systems and procurement rules) and partly perceived risk (a company is seen as more stable than an individual who might disappear).

If winning a specific type of client or contract requires trading as a limited company, that can override the purely financial calculation — especially if those contracts are worth significantly more than your current sole trader income.

IR35 — a complication for contractors

If you contract through a limited company, you may fall within IR35 (the “off-payroll working rules”). IR35 applies when HMRC deems your working arrangement equivalent to employment — you are working for one client, with no financial risk, under their direction, using their equipment.

If IR35 applies to a contract:

• For contracts with medium or large private sector clients (since April 2021), the client or agency determines your IR35 status and deducts tax at source through a “deemed salary” calculation
• For contracts with small private sector clients or direct clients, you determine your own status
• If caught by IR35, you pay Income Tax and NIC on most of your income — eliminating the tax advantage of the limited company structure

IR35 is a complex area with significant financial consequences if you get it wrong. If you are considering a limited company primarily for contracting through a single client, take professional advice before incorporating.

When to stay as a sole trader

• Your profits are consistently below £50,000
• You want to keep administration simple
• You work with a diverse range of clients (reducing IR35 risk)
• You prefer financial simplicity over marginal tax optimisation
• You are early in your freelance career and income is variable

When to consider a limited company

• Profits consistently exceed £50,000–£60,000 and are likely to stay there
• You have spare profit you can leave in the company (not extract immediately) — this defers personal tax
• Specific clients require you to operate as a limited company
• You want to bring in a business partner or outside investment
• The nature of your work creates genuine liability risks that insurance alone cannot fully cover
• You are IR35-aware and confident your working arrangements sit outside the rules

Making the switch

Incorporating is straightforward — you register at Companies House, open a business bank account in the company's name, and begin invoicing through the company. The harder part is understanding the ongoing obligations and having an accountant who knows company law.

There is no penalty for incorporating and then deciding to revert to sole trader status — you can close a company via a voluntary strike-off if it has no debts and you have not traded for three months. However, the process takes time and there are fees, so it is better to be sure before incorporating.

Most freelancers who incorporate do so with the help of an accountant. If you are considering the switch, model the numbers with your specific income, expense level, and accountancy costs before deciding — the “obvious” tax saving often looks less compelling once all costs are factored in.