How to Calculate Corporation Tax for UK Companies

Calculating corporation tax for a UK limited company is a task that every company director must master to ensure compliance with HMRC regulations. Understanding how to calculate corporation tax in the UK involves determining your taxable profit and applying the correct tax rate, while also considering possible marginal relief. This guide will walk you through the essential steps to calculate your corporation tax accurately and efficiently.

Understanding Corporation Tax

Corporation tax is a tax on the profits of limited companies and some other organisations, including clubs, societies, associations, and other unincorporated bodies. The rate of corporation tax can vary depending on the size of the company and the amount of profit it makes. For most companies, the standard rate is 19% as of the tax year 2023/24, but this can vary if changes are introduced by HMRC.

What is Taxable Profit?

Taxable profit is the amount on which corporation tax is calculated. It includes all business income minus any allowable expenses and reliefs. Calculating your taxable profit accurately is essential for determining how much corporation tax your company owes.

To calculate taxable profit:

• Start with your total revenue: This includes all income generated from your business activities.
• Subtract allowable expenses: These are costs that are necessary for running your business, such as salaries, rent, and utilities.
• Consider capital allowances: These are deductions you can claim for wear and tear on business assets.
• Include any other reliefs: This could include research and development tax credits or other applicable reliefs.

Corporation Tax Calculation Process

The process of calculating corporation tax involves several steps:

1. Calculate your taxable profit: As outlined above, this involves subtracting allowable expenses and adding any reliefs to your business income.
2. Apply the correct tax rate: As of the 2023/24 tax year, the main rate is 19%. However, be aware of any changes that could affect this rate.
3. Consider marginal relief: Marginal relief applies if your company profits fall between the lower and upper limits set by HMRC. It allows you to reduce your corporation tax liability.
4. File your tax return: Submit your company tax return (CT600) to HMRC, along with your statutory accounts and tax computations.

Marginal Relief Explained

Marginal relief is available for companies whose taxable profits fall between the small profits rate and the main rate limit. This relief ensures a gradual increase in the corporation tax rate rather than a sudden jump. It is calculated based on a formula provided by HMRC.

To apply marginal relief:

• Identify if your profits fall within the marginal relief threshold.
• Use the HMRC formula to calculate the exact amount of relief applicable.

UK tax and legal accuracy

This article is for informational purposes only and does not constitute professional tax or financial advice. Please speak to a qualified accountant before taking action. The information provided is relevant for the 2023/24 tax year.

Frequently asked questions

What is the current corporation tax rate in the UK?

The standard corporation tax rate in the UK is 19% for the 2023/24 tax year. Rates can change, so it is important to stay updated with HMRC announcements.

How do I know if my company qualifies for marginal relief?

Your company qualifies for marginal relief if your taxable profits fall between the lower and upper profits limit set by HMRC. You can calculate the relief using the official formula.

What expenses are deductible for corporation tax purposes?

Allowable expenses include costs that are necessary for running your business, such as salaries, office rent, and utilities. Ensure you keep detailed records of all expenses.

When is the deadline for filing corporation tax returns?

Corporation tax returns must be filed within 12 months of the end of your accounting period. Payment of the tax is generally due 9 months and 1 day after the end of the accounting period.

Can I change my accounting period?

Yes, you can change your accounting period, but this may affect your corporation tax calculations. It is advisable to consult with an accountant before making any changes.

Summary and next steps

Calculating corporation tax for a UK limited company involves understanding your taxable profit, applying the correct tax rate, and considering marginal relief if applicable. By following the steps outlined in this guide, you can ensure compliance and accuracy in your tax calculations. For further assistance with your corporation tax obligations, you can explore our Statutory Accounts & Tax and Bookkeeping & Xero services. To discuss your specific needs, book a discovery call with one of our expert advisors at Figures.