How Are Small Businesses Taxed in the UK?

The Complete Guide to Small Business Taxation in the UK

UK small business taxation can seem complex, but understanding the basics helps you plan effectively and avoid costly mistakes. Here's how different business structures are taxed.

Taxation by Business Structure

Sole Traders

Income Tax:

• Personal allowance: £12,570 (tax-free)
• Introductory rate: 20% on £12,571-£50,270
• Higher rate: 40% on £50,271-£125,140
• Additional rate: 45% over £125,140

National Insurance (Class 2 & 4):

• Class 2: £3.45/week if profits over £6,515
• Class 4: 9% on profits £12,570-£50,270, then 2%

Example (£35,000 profit):

• Income tax: £4,486
• National Insurance: £2,754
• Total: £7,240 (20.7%)

Limited Companies

Corporation Tax:

• 19% on profits up to £50,000
• 25% on profits over £250,000
• Marginal rate between £50,000-£250,000

Director's Tax:

• Income tax on salary
• Dividend tax on distributions
• National Insurance on salary only

Example (£35,000 company profit):

• Corporation tax: £6,650
• Plus personal tax on dividends: £1,575
• Total: £8,225 (23.5%)

Partnerships

Individual Partner Taxation:

• Each partner is taxed on their profit share
• Income tax rates for sole traders
• Class 2 and Class 4 National Insurance
• No corporation tax at the partnership level

VAT Obligations

• Registration Threshold: £90,000 annual turnover
• Standard Rate: 20% on most supplies
• Reduced Rates: 5% on qualifying goods/services
• Zero Rate: 0% on books, food, and children's clothes

VAT Schemes for Small Businesses:

• Flat Rate Scheme: Simplified calculations, fixed percentages
• Cash Accounting: Pay VAT when you receive payment
• Annual Accounting: One return per year with monthly payments

Business Rates

Slight Business Rate Relief:

• 100% relief for properties with a rateable value under £12,000
• Tapered relief up to £15,000 rateable value
• Can reduce business rates to £0 for many small businesses

Employment Taxes

PAYE (Pay As You Earn):

• Required if you employ staff or take a salary as a director
• Monthly or quarterly submissions to HMRC

Employer National Insurance:

• 13.8% on employee earnings over £175/week
• Employment Allowance: £10,500 annual offset available

Example Employment Costs (£25,000 salary):

• Gross salary: £25,000
• Employer NI: £1,725
• Total employment cost: £26,725

Capital Gains Tax

Business Asset Disposal Relief:

• 10% rate on qualifying business disposals
• Lifetime limit: £1 million
• Must own a business for 2+ years

Standard CGT Rates:

• Basic rate taxpayers: 10% (18% on property)
• Higher rate taxpayers: 20% (28% on property)

Tax Planning Opportunities

Annual Investment Allowance:

• 100% first-year allowance up to £1 million
• Immediate tax relief on qualifying equipment

Pension Contributions:

• Tax relief at the marginal rate
• Annual allowance: £60,000 (2024/25)
• Lifetime allowance: £1,073,100

Research & Development:

• 86% additional deduction on qualifying costs
• Cash credits available for loss-making companies

Common Tax Mistakes

Poor Record Keeping:

• Missing expense claims
• Inadequate documentation
• Late filing penalties

Incorrect Business Structure:

• Not reviewing as business grows
• Missing incorporation opportunities
• Inefficient salary/dividend splits

Timing Issues:

• Poor year-end planning
• Missing deadline dates
• Suboptimal expense timing

Tax Calendar for Small Businesses

Key Dates:

• 31st January: Self Assessment deadline
• 31st March: Corporation tax year-end
• 19th of each month: PAYE/NI payments
• Quarterly: VAT returns (if registered)

Professional Tax Planning Benefits

Regular tax planning can:

• Reduce overall tax burden by 15-30%
• Improve cash flow timing
• Ensure compliance with all obligations
• Identify growth opportunities

Have a chat with us to see how we can help you understand your small business taxes today.