Sole trader to limited company: when should you switch?

Published Monday 20 April 2026

Table of contents

• What's the difference between a sole trader and a limited company?
• When to change from a sole trader to a limited company?
• What are the benefits of changing from sole trader to limited company?
• What are the disadvantages of switching to a limited company?
• FAQs on switching from sole trader to limited company

Key takeaways

• Switch from sole trader to limited company when your annual profits consistently exceed £40,000–£50,000, as Corporation Tax rates of 19–25% become more favourable than Income Tax rates of up to 45% at this level.
• Protect your personal assets by incorporating as a limited company, which creates a separate legal entity so your home and personal finances are not at risk if the business incurs debt.
• Prepare for greater admin and less privacy as a limited company, since you must file statutory accounts with Companies House that are publicly available, alongside a company tax return and potentially a personal Self Assessment return.
• Work with an accountant before making the switch to calculate your specific tax savings, set up your accounting systems correctly, and stay on top of all filing requirements from day one.

What's the difference between a sole trader and a limited company?

A sole trader is a self-employed individual who runs their business as one legal entity with themselves. This means you're personally liable for any debts. A limited company is a separate legal entity from its owners. This distinction affects how you pay tax and whether your personal assets are at risk.

Here are the key structural differences.

Sole trader

• Legal status: You and your business are the same entity
• Registration: Through His Majesty's Revenue and Customs (HMRC)
• Profits: Yours to keep after tax
• Tax filing: Annual Self Assessment return
• Tax rates: Income Tax and National Insurance on profits
• Privacy: Financial information remains private

Limited company

• Legal status: The business is separate from you personally
• Registration: Through Companies House
• Profits: Paid to you via salary and/or dividends
• Tax filing: Company accounts plus personal Self Assessment
• Tax rates: Corporation Tax on profits (19–25%)
• Privacy: Company accounts are public record

Registration process

Registering as a sole trader is simpler than setting up a limited company. You register as a sole trader via HMRC, while a limited company requires incorporation through Companies House.

To register as a sole trader, you need:

• Your National Insurance number
• A business name (or you can trade under your own name)
• A way to keep records of income and expenditure for your Income Tax return

To register as a limited company, you need:

• Company name, registered office, director(s) details, shareholder/subscriber details, people with significant control (such as anyone with more than 25% of shares), SIC code, and memorandum/articles
• A company name that complies with Companies House naming rules; trading names may also be used, subject to restrictions
• A registered business address
• A memorandum and articles of association

Taxation and profits

Sole traders pay Income Tax and National Insurance via Self Assessment.

Limited companies have additional filing requirements. You may need to complete a Self Assessment tax return, depending on your income and HMRC's requirements. Being a company director doesn't automatically mean you must file one in every case. You also need to submit company accounts to Companies House and file a company tax return for Corporation Tax.

Corporation Tax rates vary depending on your profit level. Here are the current rates:

• 19% for profits under £50,000, which is known as the small profits rate
• 25% for profits over £250,000
• Marginal relief applies for profits between £50,000 and £250,000

Whether you pay less tax as a limited company depends on your profit level.

Earnings and withdrawals

When you're a sole trader, you can take money out of your business at any time. You keep all the profits after tax, so once your bill is settled, the money is yours.

Limited companies are separate from their directors, and even if you're the sole director, you can only take money out of your business through a salary and/or dividends. Many directors combine salary and dividends, but it's worth noting that the latter can only be paid to you if the business is making a profit.

Filing requirements

Accounting and bookkeeping can be time-consuming, so getting a sense of your filing requirements can help you decide if setting up a limited company is the right move.

As a sole trader, your filing requirements are relatively straightforward. Here's what you need to submit:

• A single annual Self Assessment tax return. From 6 April 2026, Making Tax Digital (MTD) for Income Tax will apply to self-employed individuals and landlords with qualifying income over £50,000. This extends to those earning over £30,000 from 6 April 2027. A further extension for those earning over £20,000 will join from April 2028.

As a limited company, you have more filing obligations. Here's what you need to submit:

• A limited company must prepare annual statutory accounts and file the appropriate version with Companies House, which may be simplified for eligible small companies or micro-entities
• A company tax return
• Directors may need to file a Self Assessment tax return depending on their circumstances and HMRC's requirements

Financial transparency

If you're planning on setting up a limited company, you should also consider how financial records are treated. Sole traders aren't required to share statutory accounts, but limited companies are.

Limited companies must file statutory accounts that are publicly available. These accounts include the following components:

• A balance sheet
• A profit and loss account
• Notes about the accounts
• Some companies must include a directors' report, but many small companies qualify for exemptions

If your business is classed as a small company or micro-entity, you might be able to submit simplified accounts. Check the HMRC guidance on filing for small companies.

When to change from a sole trader to a limited company?

Most sole traders consider switching when annual profits consistently exceed £40,000–£50,000. At this level, you're approaching the higher rate Income Tax band (40%), making Corporation Tax rates more attractive.

There are several key indicators that suggest it may be time to convert. Consider converting when:

• Annual profits exceed £50,000: Corporation Tax rates (19–25%) become more favourable than Income Tax (up to 45%)
• Personal liability concerns increase: you're taking on higher-value contracts or business risks
• Growth plans require investment: you need better access to funding and business partnerships

Consult an accountant to calculate your specific tax savings and assess timing based on your circumstances.

What are the benefits of changing from sole trader to limited company?

Converting to a limited company offers three main advantages: protection for your personal assets, potential tax savings, and improved business credibility.

• Limited liability protection: Your personal assets stay protected from business debts and losses
• Tax efficiency: Corporation Tax (19–25%) instead of Income Tax (20–45%) on profits
• Business credibility: Access to more suppliers, clients, and funding opportunities

Limited liability

Limited liability means your personal assets are protected from business debts. Because a limited company is a separate legal entity, you're not personally responsible for losses the business makes.

If your business fails and incurs debt, you only stand to lose company assets, not personal assets like your home. The exception is director misconduct, where you could be held personally liable.

Tax efficiency

Tax efficiency comes from paying Corporation Tax instead of Income Tax on business profits. Corporation Tax rates (19–25%) are typically lower than Income Tax rates (20–45%) for higher earners.

Your business needs to reach a certain profit threshold before incorporation becomes more tax efficient. Generally, this is around £40,000–£50,000 in annual profits.

From 1 April 2023, the main rate of Corporation Tax is 25%. A 19% small profits rate applies to companies with profits up to £50,000. Marginal relief is available for profits between £50,000 and £250,000.

As a company director, you'll pay National Insurance if your salary exceeds the National Insurance threshold. Many directors pay themselves a lower salary and take more income as dividends, which are taxed at lower rates than employment income.

Increased opportunities

Lenders and investors can sometimes favour limited companies over sole traders. Some companies and organisations choose not to work with sole traders, so being a limited company could increase your options.

What are the disadvantages of switching to a limited company?

Switching to a limited company isn't right for everyone. Here are the main drawbacks to weigh up:

• Increased administration: More complex accounting, filing requirements, and ongoing compliance obligations
• Reduced privacy: Company accounts and director details become public record through Companies House
• Higher costs: Additional accountancy fees, Companies House charges, and professional service costs

Increased admin

Setting up as a limited company is more complicated and time-consuming, with more paperwork and admin.

Less privacy

As a limited company, your financial information becomes publicly available through Companies House.

Is it worthwhile converting from sole trader to limited company?

Making the right decision requires calculating your potential tax savings and assessing your business growth plans.

Use accounting software to track your profits and cash flow patterns. This data helps you and your accountant determine the optimal conversion timing and structure.

In the meantime, if you want to understand more about how Making Tax Digital for Income Tax will impact you as a sole trader, take a look at our expert FAQs or dedicated resource hub.

Managing your business finances with Xero

Switching to a limited company brings new responsibilities, like filing company accounts and running payroll. The right software makes a real difference. Xero helps you handle these tasks easily, so you can run your business, not just your books.

With automated bank feeds, simple payroll, and clear financial reports, you'll have everything you need to stay compliant and in control. It gives you a real-time view of your cash flow, helping you make smarter decisions as your business grows. If you're ready to see how Xero can support your new limited company, you can get one month free.

FAQs on switching from sole trader to limited company

Here are answers to common questions about converting from sole trader to limited company.

When is the best time to switch from sole trader to limited company?

The best time to switch is typically when your annual profits consistently exceed £40,000–£50,000. At this level, Corporation Tax rates become more favourable than Income Tax rates, and the administrative burden becomes worthwhile.

How long does it take to register a limited company?

You can register a limited company through Companies House in as little as 24 hours if you file online. Once registered, you'll receive your certificate of incorporation and can begin trading immediately.

Can I switch back to sole trader after becoming a limited company?

Yes, you can close your limited company and return to trading as a sole trader. However, you'll need to formally dissolve the company through Companies House and ensure all tax obligations are met before closing.

Do I need an accountant to switch to a limited company?

While you can technically register a limited company yourself, it's highly recommended to work with an accountant. They can help you understand the tax implications, set up your accounting systems properly, and ensure you're compliant with all filing requirements from the start.