Do Sole Traders Pay Corporation Tax in the UK?

Yes, sole traders do not pay Corporation Tax in the UK. They file Income Tax returns with HMRC through the Self Assessment system on their taxable business profits. They may also have to pay National Insurance contributions (NICs) and Value Added Tax (VAT) depending on their profits and business activities.

A sole trader’s tax bill varies according to their business profits, other income, and allowable business expenses. Understanding these tax obligations can help business owners manage their finances, avoid penalties, and decide whether to be a sole trader or form a limited company.

Instead of Corporation Tax, you pay Income Tax on your taxable business profits after deducting allowable expenses. You report these profits to HMRC via Self Assessment. 

What is Corporation Tax? 

Corporation Tax is a tax that limited companies pay on their taxable profits. It applies to 

profits from business activities or other taxable income. 

Company Taxable profits	Corporation Tax Rate
Up to £50,000	19%
£50,001 to £250,000	Marginal relief may apply
Above £250,000	25%

These profit thresholds may be reduced if the company has associated companies or accounting shorter than 12 months. 

A limited company has to file Corporation Tax returns with HMRC. Its directors and shareholders may also be personally responsible for taxes if they are paid salaries and/or dividends. 

Why Are Sole Traders Not Liable for Corporation Tax?

A sole trader and the business are not legal entities. The money earned in the business is the individual’s and not the business’s, even if it is kept in a separate business bank account.

A limited company is a legal entity in its own right. It has its own income, assets and liabilities, and it pays Corporation Tax on its taxable profits.

That’s why tax regulations vary for limited companies and sole traders. 

What Taxes Do Sole Traders Have to Pay?

Although sole traders do not pay Corporation Tax, they have to manage some other tax responsibilities. These taxes include income tax, National Insurance, and VAT. 

Income Tax on Business Profits

Income Tax is the main tax sole traders pay. It is based on the business’s taxable profits, rather than its turnover.

The following are the IT rates for 2026/27 for England, Wales and Northern Ireland.

Tax Brand	Tax Income After Personal Allowance	Rate
Personal Allowance	Up to £12,570	0%
Basic Rate	Up to £37,700	20%
Higher Rate	£37,701–£125,140	40%
Additional Rate	Above £125,140	45%

The Personal Allowance is £12,570. It is the income amount that you can get without paying Income Tax.

Your Personal Allowance is reduced by £1 for every £2 of income over £100,000. Once you earn £125,140, it turns to 0%.

Income Tax bands and rates vary in Scotland. Other income, like your rent or a job, may also impact the taxes you are required to pay.

National Insurance Contributions

Sole traders may also have to pay National Insurance, on the basis of their annual profits.

Class 4 National Insurance for 2026/27 is:

• 6% on profits above £12,570 and up to £50,270.
• 2% on profits above £50,270.

Class 2 National Insurance works differently. If your annual profits are £7,105 or more, you will receive a National Insurance credit towards your record without even making a Class 2 payment. 

If your profits are less than £7,105, you may wish to pay voluntary Class 2 contributions at £3.65 per week for 2026/27. This may help to maintain your National Insurance record and access to benefits.

The majority of self-employed people pay National Insurance via Self Assessment.

Value Added Tax

In certain cases, sole traders may also be subject to VAT.

The VAT threshold is £90,000. You must register for VAT if your turnover exceeds £90,000

over a 12-month period. Additionally, you will need to register if you believe your taxable turnover will exceed £90,000 within 30 days.

Upon registration, you are required to register for VAT, make returns and pay the tax to HMRC when you are selling goods or providing services to which the VAT rules apply. You may also be able to reclaim VAT on eligible business purchases.

Registration is voluntary, even if turnover is less than the threshold. But there are sole traders who are not required to register for VAT.

Other Tax Responsibilities

There are other tax liabilities, depending on your business activity.

There may be additional charges such as business rates if you are using business premises. For some business assets, you might owe Capital Gains Tax upon selling. If you have employees, you may have to run PAYE and pay PAYE employer NICs. You may also be liable to import duties when importing some items to the UK. 

How Is Tax Calculated for Sole Traders?

A sole trader’s taxable profits, rather than total turnover, are used to calculate sole trader tax.

Turnover is all of the money your business generates. Taxable profit is the profit left after deducting your allowable business expenses and adding back business tax reliefs.

Step 1: Calculate Your Business Income

Include all the income earned by your business in the tax year. This comprises customer payments, product sales and fees for services.

If a company earns £45,000 in a year, its turnover for that year is £45,000.

Step 2: Subtract Allowable Business Expenses

Business expenses are tax-deductible. These may include:

• Rental and utility bills.
• Business insurance.
• Marketing and advertising.
• Accounting fees.
• Business travel.
• Office supplies.
• Software subscriptions.

Typically, personal expenses cannot be deducted as business expenses. If you use an expense for both a business purpose and a personal purpose, only the business use can typically be claimed.

Step 3: Calculate Your Taxable Profit

Simply use this formula:

Taxable Profit = Business Income − Allowable Business Expenses

For instance, if your business’s total income for a year is £45,000 and your allowable expenses are £15,000, then your taxable profit is £30,000.

Step 4: Calculate Income Tax and National Insurance

Assume that your business makes a taxable profit of £30,000 during the 2026/27 period. Your only income is the self-employed profit, with no other taxable income. The Income Tax calculation will be:

• Business profit: £30,000
• Personal Allowance: £12,570
• Taxable income after Personal Allowance: £17,430 
• Income Tax at 20%: £3,486

The National Insurance you pay in Class 4 is:

£30,000 − £12,570 = £17,430

£17,430 × 6% = £1,045.80

Your total estimated income tax and Class 4 National Insurance is £4,531.80.

The following example applies to the standard rules of England, Wales and Northern Ireland. This is your actual tax on your income may vary depending on other income, allowances or tax reliefs.

Can You Use a Sole Trader Tax Calculator?

Yes. Use a sole trader tax calculator to estimate your Income Tax & National Insurance.

Typically, you must provide your yearly business income, expenses you can deduct from that income, estimated profit and other personal income.

You can use the calculator to get an estimate of the taxes to save. That is, however, an estimate. The amount of tax actually charged will depend on the information you provide in a Self Assessment and the tax rules for the year.

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How Do Sole Traders Pay Tax to HMRC?

Sole traders typically use Self Assessment to pay Income Tax and National Insurance to HMRC. The following are the major steps.

Register for Self Assessment

For most people, you must register for Self Assessment when gross trading income exceeds £1,000 per tax year.

You can get the first £1,000 from the trading allowance. Use of this allowance disallows the deduction of actual business expenses of such income.

If you need to file a Self Assessment tax return for the first time, you first need to register with HMRc by 5th of october following the end of tax year.

Keep Accurate Business Records

Maintain all business income and expenses. These assist you to compute your earnings and fill out the tax return appropriately. Important records include:

• Sales receipts and sales invoices
• Purchase invoices
• Business bank statements
• Expense records
• VAT records (if registered)
• Payroll records (if you have employees)

Records will normally be required to be retained for five years after 31 January for the relevant tax year.

Submit Your Self Assessment Tax Return

Complete the tax return by stating how much income and expenditure have occurred for your business at the end of the tax year.

Employment income, rental income, savings income, dividends and other taxable income also may be included in your return. HMRC uses this information to work out your tax bill.

Pay Your Tax Bill

The majority of Self Assessment deadlines are regular:

• 5 October: Deadline to register for self assessment. If you need to file a return for last year’s tax and have not registered, do so now.

• 31 October: Last day to submit a paper tax return.

• 31 January: Tax return and payment due online.

• 31 July: If there is a second payment on account.

For instance, the online return filing and tax return deadline for the 2025/26 tax year is 31 January 2027. The deadlines for the 2026/27 tax year fall in 2027 and 2028.

Late payments may result in penalties and interest.

Making Tax Digital for Income Tax: What Sole Traders Need to Know

Making Tax Digital (MTD) for income tax can change the way how many sole traders report their business income to HMRC. It applies to qualifying income from self-employment and property. 

The planned start dates are like this:

Qualifying Income	Start Date
More than £50,000 in 2024/25	6 April 2026
More than £30,000 in 2025/26	6 April 2027
More than £20,000 in 2026/27	6 April 2028

Under MTD, affected sole traders will need to:

• Keep digital records of business income and expenses.
• Use compatible software to maintain their records.
• Submit quarterly updates to HMRC.
• Submit a final declaration to confirm their annual tax position.

What Are Payments on Account?

Payments on account are an advance payment on your next Self Assessment tax bill.

They usually apply when your last Self Assessment return was over £1000, but less than 80% of your tax was paid in Self Assessment.

Each payment on account is only half of the previous year’s Self Assessment tax bill. The payment is usually due on 31 January and 31 July. 

HMRC uses these payments to check your tax return against payments made when you file your next tax return. You might be required to pay the balance or get a reimbursement.

When Should a Sole Trader Consider Becoming a Limited Company?

No one knows what the right profit level is for converting every sole trader to a limited company. The rationale for the decision is based on business expansion, tax planning, personal liability or future plans.

Now is the time to consider restructuring your business if you are in any of the following scenarios.

Your Business Profits Are Increasing

If your business is making better and more steady profits, do an analysis of the tax prices of both structures.

If you don’t have to extract all profits from the company straight away, there are tax-planning opportunities with a limited company.

Be sure to take into account Corporation Tax and personal taxes on salary or dividends before making a decision.

You Want to Protect Your Personal Assets

A sole trader bears the responsibility for the business debts themself. A limited company is a legal entity and the owner has generally limited liability.

But, there may be personal risks with personal guarantees and some legal obligations.

You Can Manage Additional Responsibilities

If you are considering having business partners or attracting investors or issuing shares, you may want to consider a limited company.

You can manage additional responsibilities

There are more reporting and compliance obligations for limited companies. There might be a need for annual accounts, Corporation Tax returns, Companies House accounts for the company, payroll and director responsibilities.

What Are the Tax Implications of Switching to a Limited Company?

Once you become a sole trader and then transition to a limited company, your tax status and business structure will also change.

The new company is a legal entity. It has to have its own accounting and tax regime.

Register your Limited Company

The company must be registered at Companies House. This includes information about the company, including the company name, registered office, directors, and shareholders.

Register for Corporation Tax

The company has to be registered for Corporation Tax with HMRC, usually within three months of carrying out business activity. The company must then pay Corporation Tax on its taxable profits.

File Company Accounts and Tax Returns

A limited company must maintain proper accounting records and submit annual accounts.

It is also required to keep submitting a Company Tax Return as required and adhere to Companies House filing dates.

Decide How to Take Money Out

There are various ways a company director or shareholder can take money out of the company.

1. Salary: Wages will be paid through payroll. May be liable to PAYE and National Insurance.

2. Dividend: Available profit after Corporation Tax is shared out between the shareholders as dividends. May be subject to Dividend Tax.

3. Director’s Loan: Borrowing money from the company. There are specific tax and reporting rules that need to be followed.

The right route depends on your income, company profits, and financial strategies.

Common Tax Mistakes Sole Traders Should Avoid

Many sole traders deal with a number of aspects of the business themselves. Tax errors can lead to penalties or extra costs.

Here are some common mistakes to avoid:

1. Mixing business and personal expenses: Maintain good records, and only claim deductible business expenses.

2. Missing your tax deadline: Ensure that the Self Assessment return is in on time and that the tax is paid.

3. Ignoring VAT registration: Regularly review your taxable turnover and register if necessary.

4. Not keeping proper records: Save invoices, receipts and bank statements.

5. Confusing turnover with profit: It is a good idea to ensure you do not confuse turnover with profit, since your income tax is generally based on taxable profit, not total sales.

6. Not saving for taxes: Save money on a regular basis in preparation for your taxes.

Wrapping Up 

In the UK, sole traders are not liable to Corporation Tax. They are liable to pay Income Tax on their taxable business profits and may be liable to pay National Insurance and VAT.

To help you manage your finances and meet HMRC requirements, this is blog is an overview of the tax rules. Keep good books, claim expenses, and save for taxes year-round.

If you’re not sure whether to stay a sole trader or set up a limited company, consult an accountant. They can review your business profitability, tax position, and business plans to determine the best structure for your business.

Frequently Asked Questions

Q1: Do Sole Traders Pay Corporation Tax in the UK?

No, sole traders do not pay Corporation Tax in the UK; they have to pay income tax on their taxable business profit through Self Assessment. They may also need to pay National Insurance contributions according to their profits. 

Q2: Do Sole Traders Pay Income Tax Instead of Corporation Tax?

Yes. Sole traders pay Income Tax on their business profits after deducting allowable expenses. The amount of the tax depends on the total taxable income and income tax rates. National Insurance could also be applicable.

Q3: Can a Sole Trader Register for Corporation Tax?

No. A sole trader cannot register for Corporation Tax whilst they are a sole trader. You will likely need to establish a limited company.

Q4: Do Sole Traders Need to Submit a CT600?

No. Sole traders complete tax returns called Self Assessment. Limited companies pay their Corporation Tax on a CT600.

Q5: Do Freelancers Pay Corporation Tax in the UK?

Income Tax is paid on the taxable profit of sole traders who are freelancers. Freelancers working through limited companies will be liable to Corporation Tax on company profits.

Q6: Can a Sole Trader Become a Limited Company?

Yes. A sole trader can register a limited company via Companies House. The new company will be legally, accounting, and tax-independent.