UK Small Business Tax Guide (2026)
A complete guide for UK business owners, freelancers, and company directors.
Running a business in the UK comes with several tax responsibilities. Whether you are self-employed or operating a limited company, understanding how small business tax works can help you stay compliant with HMRC while ensuring you keep as much of your profit as possible.
In this guide we’ll explain:
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How small business tax works in the UK
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The corporation tax rate for limited companies
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The VAT threshold UK businesses must monitor
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How directors pay themselves through salary vs dividends
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What business expenses you can claim
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How to reduce tax legally
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Key HMRC deadlines
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Upcoming Making Tax Digital changes
If you are starting a business or already running one, this guide will give you a clear understanding of the UK tax system.
How Small Business Tax Works in the UK
Small business tax in the UK depends on how your business is structured.
There are two main structures:
Self-Employed (Sole Trader)
If you operate as a sole trader:
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Your business income is treated as personal income
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You submit a Self Assessment tax return
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You pay Income Tax and National Insurance
Your tax rates will follow standard UK income tax bands.
Limited Company
If your business operates as a limited company:
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The company pays Corporation Tax on profits
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Directors usually pay themselves using salary and dividends
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Personal tax may apply to dividends taken from the company
This structure often becomes more tax efficient once profits increase.
A key decision for many entrepreneurs is self employed vs limited company UK, which we explain later in this guide.
How Much Tax Does a Small Business Pay in the UK?
The amount of tax a small business pays depends on:
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Business structure
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Profit levels
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Allowable expenses
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How money is withdrawn from the business
Self-Employed Tax
If you are self employed, tax is based on profit.
Current rules:
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Personal allowance: £12,570
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Income tax rates apply after this
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National Insurance contributions may apply
Self employed individuals must submit a Self Assessment tax return each year.
Limited Company Tax
Limited companies pay Corporation Tax on profits.
For many businesses this is the primary tax applied to company profits.
After corporation tax is paid, company owners can extract profits through:
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Salary
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Dividends
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Pension contributions
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Directors loans
We explore these strategies later in the guide.
Corporation Tax UK Rate Explained
Corporation tax is the main tax paid by limited companies in the UK.
Current corporation tax rates:
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19% for profits up to £50,000
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25% for profits above £250,000
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Marginal relief applies between these thresholds
Corporation tax is paid on profit after allowable expenses.
Typical expenses that reduce corporation tax include:
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Business software
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Office equipment
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Marketing costs
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Travel for business
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Professional services
Understanding corporation tax UK rates helps business owners forecast their tax liabilities.
Self Employed vs Limited Company UK
Many entrepreneurs ask whether they should operate as a sole trader or limited company.
Both structures have advantages.
Sole Trader Advantages
If you are self employed, tax is based on profit.
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Simple structure
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Less administration
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Easy to start
However:
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Profits are taxed as personal income
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There is no separation between business and personal finances.
Limited Company Advantages
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Potential tax efficiency
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Limited liability protection
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Greater credibility with clients
Many business owners switch to a limited company once profits reach around £40k–£60k per year.
Choosing the right structure can have a significant impact on your tax position.
Salary vs Dividends UK (How Directors Pay Themselves)
One of the most common questions from company directors is how to take money from a limited company.
Directors typically use a combination of salary and dividends.
Salary
If you are self employed, tax is based on profit.
A director may take a salary through payroll.
Benefits include:
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Qualifying for National Insurance credits
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Building eligibility for state pension
However salary is subject to:
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Income tax
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Employer National Insurance
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Employee National Insurance
Dividends
Dividends are payments made from company profits after corporation tax.
Advantages:
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Lower tax rates than salary
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No National Insurance contributions
However dividend income is taxed once the dividend allowance is exceeded.
Understanding salary vs dividends UK is essential for tax planning.
Dividend Tax UK Explained
When dividends are paid from a company, they are taxed personally by the director.
Key points:
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There is a tax free dividend allowance
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Dividend tax rates depend on income band
Dividend tax rates include:
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Basic rate dividend tax
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Higher rate dividend tax
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Additional rate dividend tax
The exact amount payable depends on total income for the year.
Understanding dividend tax UK rules helps directors avoid unexpected tax bills.
VAT Threshold UK Businesses Must Monitor
VAT (Value Added Tax) is charged on many goods and services in the UK.
Businesses must register for VAT if their taxable turnover exceeds the VAT threshold UK limit.
Current VAT threshold:
£90,000 in a rolling 12 month period
Once registered, businesses must:
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Charge VAT on applicable sales
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Submit VAT returns to HMRC
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Keep digital records
However businesses below the threshold can still register voluntarily.
VAT registration can sometimes benefit businesses working with VAT-registered clients.
Allowable Business Expenses UK
Businesses can reduce their tax bill by claiming allowable expenses.
These are costs incurred wholly and exclusively for business purposes.
Common business expenses include:
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Office rent
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Equipment and computers
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Software subscriptions
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Marketing and advertising
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Professional services
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Business travel
Understanding business expenses you can claim UK is essential for accurate bookkeeping and tax efficiency.
Directors Loan Account Explained
A directors loan account records money moving between a director and their company.
For example:
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The director lends money to the company
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The director withdraws funds not taken as salary or dividends
If a director owes money to the company at year end, there may be additional tax implications.
Understanding directors loan account rules helps avoid unexpected tax charges.
How To Pay Less Tax Legally as a Business Owner
Reducing tax legally is about planning and using available allowances.
Common strategies include:
Pension Contributions
Company pension contributions are tax deductible.
They can reduce corporation tax while building retirement savings.
Claiming All Allowable Expenses
Accurate bookkeeping ensures every eligible expense is claimed.
This can significantly reduce taxable profit.
Optimising Salary vs Dividends
Directors often adjust their salary and dividend mix to reduce overall tax.
Timing of Expenses
Purchasing equipment before year end may reduce corporation tax.
These strategies help business owners pay less tax legally while remaining compliant with HMRC.
Corporation Tax Deadlines UK
Limited companies must meet specific tax deadlines.
Key corporation tax deadlines include:
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Corporation tax payment due 9 months and 1 day after year end
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Corporation tax return due 12 months after year end
Missing deadlines can lead to penalties and interest charges.
Keeping accurate financial records helps ensure deadlines are met.
Making Tax Digital UK Explained
HMRC is introducing Making Tax Digital (MTD) to modernise the tax system.
MTD requires businesses to:
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Keep digital financial records
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Submit tax updates through compatible software
The aim is to improve tax accuracy and reduce errors.
Over time, more businesses will be required to comply with Making Tax Digital UK rules.
Using accounting software such as Xero can help businesses prepare for these changes.
Frequently Asked Questions
How much tax does a small business pay in the UK?
Small businesses pay different taxes depending on their structure. Sole traders pay income tax and national insurance, while limited companies pay corporation tax on profits.
What is the VAT threshold in the UK?
Businesses must register for VAT when taxable turnover exceeds £90,000 in a 12 month period.
How do company directors pay themselves?
Most directors use a combination of salary and dividends to withdraw money from their company.
What expenses can small businesses claim?
Common allowable expenses include equipment, office costs, software, travel and professional services.
When is corporation tax due?
Corporation tax must usually be paid 9 months and 1 day after the company’s financial year end.
Final Thoughts
Understanding UK small business tax rules is essential for running a successful and compliant business.
The amount of tax you pay depends on factors such as:
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Business structure
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Profit levels
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Allowable expenses
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How profits are extracted
With the right tax planning and professional advice, business owners can ensure they remain compliant with HMRC while keeping more of their hard-earned profits.
If you run a business and want help understanding your tax position, speaking with an accountant can help ensure your finances are structured in the most efficient way possible.