Corporation Tax Calculator UK

Corporation Tax is the tax that limited companies pay on their profits in the UK. It applies to:

• Trading profits
• Investments
• Sale of assets (chargeable gains)

How to Use the Corporation Tax Calculator UK

Using the calculator is straightforward:

1. Enter your company’s total income
2. Deduct allowable business expenses
3. Input your taxable profit
4. Click calculate

You’ll instantly see:

• Corporation tax due
• Effective tax rate
• Net profit after tax

UK Corporation Tax Rates (2026)

Corporation Tax rates depend on your company’s profits:

• 19% – Small profits (up to £50,000)
• 25% – Main rate (over £250,000)
• Marginal Relief – Applies between £50,000 and £250,000

Our Corporation Tax Calculator UK automatically applies the correct rate.

How Corporation Tax Is Calculated

Step 1: Calculate Profit

Profit = Income – Allowable Expenses

Step 2: Apply Tax Rate

• 19% for small profits
• 25% for larger profits
• Marginal relief for profits in between

What Are Allowable Expenses?

You can reduce your corporation tax bill by deducting:

• Salaries and wages
• Office costs
• Travel expenses
• Professional fees
• Equipment and tools

Why Use Our Corporation Tax Calculator UK?

Instant and accurate tax estimates
Automatically applies correct tax rates
Helps with financial planning
Simple and easy to use
Ideal for small and growing businesses

Who Should Use This Tool?

This calculator is perfect for:

• Limited company directors
• Small business owners
• Startups and entrepreneurs
• Accountants and bookkeepers

Example Calculation

If your company makes £100,000 profit:

• Corporation tax ≈ £19,000–£25,000 (depending on reliefs)
• Net profit after tax calculated instantly

Common Corporation Tax Mistakes

• Not claiming all allowable expenses
• Misunderstanding marginal relief
• Mixing personal and business expenses
• Poor record-keeping

Our Corporation Tax Calculator UK helps you avoid these issues.

Tips to Reduce Your Corporation Tax

• Claim all allowable expenses
• Use capital allowances
• Contribute to pensions
• Plan dividend payments efficiently

Stay Compliant and Plan Ahead

Understanding your corporation tax helps you:

• Budget effectively
• Avoid unexpected tax bills
• Make better financial decisions
• Stay compliant with HMRC

Start Using the Corporation Tax Calculator UK

Use our free Corporation Tax Calculator UK above to estimate your company tax and take control of your business finances.

FAQs – Corporation Tax Calculator UK

What is the corporation tax rate in the UK?

Rates range from 19% to 25%, depending on your profit level.

Do all companies pay corporation tax?

Yes, all UK limited companies must pay tax on their profits.

What expenses can I claim?

You can claim business-related expenses such as salaries, rent, and office costs.

What is marginal relief?

It reduces the tax rate for companies earning between £50,000 and £250,000.

Is this calculator accurate?

Yes, it provides a reliable estimate based on current UK tax rules.