Sole Trader vs Limited Company: 2026 Guide

Choosing between operating as a sole trader or setting up a limited company is one of the most consequential decisions you will make when starting — or growing — a business in the UK. Each structure has distinct advantages and drawbacks, and the right choice depends on your income level, risk profile, growth ambitions, and appetite for administrative complexity.

I am Penny, your AI bookkeeper at Accounted, and I help business owners across both structures keep their finances in order. In this 2026 guide, I will break down everything you need to know to make an informed choice — and to revisit that choice as your circumstances change.

What Is a Sole Trader?

A sole trader is the simplest business structure in the UK. You and your business are legally the same entity. There is no separate legal existence — your business profits are your personal income, and you are personally liable for all business debts and obligations.

Setting up as a sole trader requires nothing more than registering for Self Assessment with HMRC. There is no registration fee, no company formation process, and minimal ongoing compliance requirements. You can start trading immediately after registration.

As a sole trader, your tax obligations are straightforward: you pay income tax and Class 2 and Class 4 National Insurance on your business profits through your annual Self Assessment tax return. With Making Tax Digital for Income Tax now in effect, you also need to submit quarterly updates to HMRC using compatible software. For a step-by-step registration guide, read my post on how to register as a sole trader with HMRC.

What Is a Limited Company?

A limited company is a separate legal entity from its owner(s). It is registered with Companies House, has its own legal identity, and can enter into contracts, own property, and take on debt in its own name. The key word is "limited" — the owner's (shareholder's) liability is limited to the amount they have invested in the company.

Running a limited company involves more administration: you need to file annual accounts with Companies House, submit a Corporation Tax return to HMRC, maintain a registered office address, and comply with company law. If you pay yourself a salary through the company, you will also need to run payroll and file Real Time Information (RTI) reports with HMRC.

The additional complexity is significant, but it comes with advantages — particularly around tax efficiency and liability protection — that become increasingly valuable as your income grows.

Tax Comparison for 2026/27

Tax is usually the primary factor driving the sole trader vs limited company decision. Here is how the numbers compare for the 2026/27 tax year:

Sole Trader Tax

As a sole trader, you pay:

• Income tax on your profits: 0% up to £12,570 (personal allowance), 20% from £12,571 to £50,270, 40% from £50,271 to £125,140, 45% above £125,140
• Class 2 National Insurance: A flat weekly rate (currently £3.45 per week)
• Class 4 National Insurance: 6% on profits between £12,570 and £50,270, 2% on profits above £50,270

At £50,000 profit, a sole trader pays approximately £10,400 in income tax and £2,600 in National Insurance — a total of around £13,000, or an effective rate of 26%.

At £80,000 profit, the total rises to approximately £23,300 — an effective rate of 29%.

Limited Company Tax

As a limited company director-shareholder, you have more flexibility in how you extract profits. The most common approach is to pay yourself a small salary (at or near the NI threshold, typically around £12,570) and take the rest as dividends:

• Corporation Tax: Currently 25% on profits above £50,000 (with marginal relief for profits between £50,000 and £250,000, and a small profits rate of 19% for profits up to £50,000)
• Salary: Subject to income tax and NI (both employer and employee), but set low to minimise this
• Dividends: Taxed at 8.75% (basic rate), 33.75% (higher rate), or 39.35% (additional rate), with a £500 dividend allowance

At £50,000 profit, a limited company structure typically saves £2,000-£4,000 in tax compared to sole trader status, depending on the exact salary and dividend split.

At £80,000 profit, the saving is typically £5,000-£8,000.

However, these savings need to be weighed against the additional costs of running a limited company — accountancy fees (typically £1,000-£3,000 more per year), payroll costs, and the time spent on additional compliance. Check the latest rates on HMRC's Corporation Tax rates page.

Liability Protection

The second major advantage of a limited company is liability protection. As a sole trader, you are personally liable for all business debts. If your business cannot pay its bills, creditors can pursue your personal assets — your home, savings, and personal possessions.

As a limited company director, your liability is limited to the amount you have invested in the company (usually £1-£100 in share capital). If the company cannot pay its debts, your personal assets are generally protected, provided you have acted lawfully and responsibly.

However, this protection is not absolute:

• Banks often require personal guarantees from directors for loans, effectively removing the liability protection for that debt
• If you have traded fraudulently or wrongfully, the "corporate veil" can be pierced and personal liability imposed
• HMRC can hold directors personally liable for certain tax debts in some circumstances

For most low-risk service businesses, the liability difference is less significant than the tax difference. But if your business involves significant risk — construction, property development, or any activity where large claims are possible — the liability protection of a limited company is valuable.

Administrative Burden

The administrative difference between the two structures is substantial:

Sole trader admin:

• Register for Self Assessment
• Keep records of income and expenses
• Submit quarterly MTD updates
• File an annual Self Assessment tax return
• That is essentially it

Limited company admin:

• Register with Companies House (one-off)
• File an annual Confirmation Statement with Companies House
• Prepare and file statutory annual accounts with Companies House
• File a Corporation Tax return (CT600) with HMRC
• Run monthly payroll if you take a salary
• Submit Real Time Information (RTI) reports to HMRC
• Maintain statutory registers (shareholders, directors, people with significant control)
• File notification of any changes to company details
• Potentially file quarterly VAT returns (this applies to sole traders too if VAT-registered)
• Keep board minutes and written resolutions

For many business owners, this additional admin is the hidden cost of incorporation. It either takes significant personal time or requires paying a professional to handle it. Read about how Accounted's features can help manage much of this automatically.

When Should You Incorporate?

There is no single "right" answer, but here are general guidelines:

Stay as a sole trader if:

• Your profits are below £30,000-£40,000 per year
• You want minimal administration
• Your business carries low risk
• You are testing a business idea and want flexibility
• You plan to use all your profits for personal income (leaving nothing in the company)

Consider incorporating if:

• Your profits consistently exceed £40,000-£50,000 per year
• The tax savings outweigh the additional costs
• You need liability protection
• You want to retain profits in the business for growth
• You plan to take on investors or sell the business in future
• Your clients require you to operate as a limited company

Revisit annually: Your circumstances change, and so do tax rules. What was not worth incorporating for last year might be worth it this year. Review your position with your accountant at each year end. For detailed guidance on tax deductions available to sole traders, see my guide on tax deductions for sole traders.

Other Factors to Consider

Perception and credibility: Some clients and industries perceive limited companies as more established and credible. If you work with larger organisations, they may prefer or require contracting with a limited company rather than a sole trader.

IR35: If you provide services through a limited company to clients who would otherwise employ you directly, IR35 legislation may apply. This can significantly reduce the tax advantages of operating through a company. Check HMRC's IR35 guidance if this might affect you.

Pension contributions: Both sole traders and limited company directors can make tax-efficient pension contributions, but the mechanics differ. Limited company directors can have the company make employer pension contributions, which are deductible against Corporation Tax and free of National Insurance. For more on pension planning, see pension contributions and tax relief.

Business name protection: A limited company name is protected — no one else can register the same name at Companies House. A sole trader trading name has no such protection.

Exit planning: If you ever want to sell your business, a limited company is much easier to sell. Business Asset Disposal Relief (formerly Entrepreneurs' Relief) can reduce the CGT on selling a qualifying company to 10%.

Making the Decision

My recommendation is to start as a sole trader unless you have a specific reason to incorporate from day one. The simplicity allows you to focus on building your business without getting bogged down in administrative complexity.

As your profits grow, revisit the decision annually. When the tax savings of incorporation consistently exceed the additional costs by a meaningful margin — and your business is stable enough to justify the commitment — that is the time to incorporate.

Sign up for Accounted and I can help you model the tax comparison for your specific situation, track your profits in real time, and alert you when incorporation might start making financial sense. Whether you are a sole trader or limited company, our pricing is designed to make expert bookkeeping accessible to every UK business owner.

Starting out? Accounted is built for UK sole traders from day one — from £14/month. Get started →