How to Calculate Corporation Tax: Step-by-Step Guide

Introduction to Corporation Tax Calculation

Corporation tax is a tax levied on the profits of a company in the UK. The tax rate varies depending on the company's profits, with a small profits rate and a main rate. In this guide, we will walk you through the steps to calculate corporation tax manually.

Understanding the Formula

The corporation tax formula is as follows: [ ext{Corporation Tax} = ( ext{Profits} imes ext{Tax Rate}) - ext{Marginal Relief} ] Where:

• Profits: The company's taxable profits
• Tax Rate: The applicable tax rate (small profits rate or main rate)
• Marginal Relief: The relief given to companies with profits between the small profits rate and main rate thresholds

Step-by-Step Calculation

Step 1: Determine the Taxable Profits

First, calculate the company's taxable profits by deducting all allowable expenses from the total income.

Step 2: Identify the Applicable Tax Rate

Next, determine the applicable tax rate based on the company's profits. For the 2022-2023 tax year, the small profits rate is 19% for profits up to £50,000, and the main rate is 25% for profits over £250,000. For profits between £50,000 and £250,000, marginal relief applies.

Step 3: Calculate the Marginal Relief

If the company's profits are between £50,000 and £250,000, calculate the marginal relief. The marginal relief formula is: [ ext{Marginal Relief} = rac{( ext{Profits} - £50,000) imes 19%}{( ext{Profits} - £50,000) imes (25% - 19%)} ]

Step 4: Calculate the Corporation Tax

Now, plug in the values into the corporation tax formula: [ ext{Corporation Tax} = ( ext{Profits} imes ext{Tax Rate}) - ext{Marginal Relief} ]

Worked Example

Let's say a company has taxable profits of £100,000. The applicable tax rate is 19% for the first £50,000 and 25% for the remaining £50,000. However, since the profits are between £50,000 and £250,000, marginal relief applies. [ ext{Marginal Relief} = rac{£50,000 imes 19%}{£50,000 imes (25% - 19%)} ] [ ext{Marginal Relief} = rac{£9,500}{£50,000 imes 6%} ] [ ext{Marginal Relief} = rac{£9,500}{£3,000} ] [ ext{Marginal Relief} = £3,167 ] Now, calculate the corporation tax: [ ext{Corporation Tax} = (£100,000 imes 19%) - £3,167 ] [ ext{Corporation Tax} = £19,000 - £3,167 ] [ ext{Corporation Tax} = £15,833 ]

Common Mistakes to Avoid

• Incorrectly identifying the applicable tax rate
• Failing to calculate marginal relief when applicable
• Incorrectly calculating the marginal relief

When to Use the Calculator

For convenience and accuracy, use our free corporation tax calculator to instantly calculate your corporation tax with a breakdown, formula, and payment schedule.

Conclusion

Calculating corporation tax manually can be complex, especially when marginal relief applies. By following these steps and understanding the formula, you can accurately calculate your corporation tax. However, for convenience and to avoid common mistakes, use our free corporation tax calculator.