Finance · 17 June 2022

What is Corporation Tax?

Corporation Tax

Limited companies in the UK, along with certain other types of organisations, are required to pay corporation tax. Its is based on on how much money a company makes each year in profits.

You are required to pay taxes on any profits you make; however, there are deductions and allowances available to you that can help you lower the amount of taxes you owe as a result of your business activities.

The following are the aspects of a limited company that are subject to corporation tax in particular:

  • Earnings that are a result of conducting business, also known as trading profits
  • Investments
  • Gains that are subject to taxation can be realised from the sale of assets like land, property, shares of stock, and machinery.

Who has to Pay Corporation Tax?

Every limited company operating in the UK is subject to paying corporation tax. Sole proprietorships and partnerships are exempt from paying corporation tax; however, these types of businesses are required to file a tax return and pay income tax on any profits they make.

However, there are other organisations that may be required to pay corporation tax even though they are not structured as limited companies.

These organisations are not incorporated and are the following:

  • Housing Associations
  • Associations requiring membership
  • Groups such as clubs and societies
  • Co-operatives

How much is the government’s levy on businesses in the UK?

The primary rate of corporation tax in the UK is currently set at 19 percent, and this rate applies to all business profits. The rate will remain unchanged at its current level for the next two years, contradicting an earlier promise made by the government to lower it to 17 percent beginning in April 2020.

Changes to the Corporate Tax rate for April 2023

The forthcoming alterations to the corporation tax rate were announced by the government in the Budget 2021 document.

If your taxable profits are more than two hundred fifty thousand pounds after April 2023, you will be subject to an upper limit of twenty-five percent of those profits. If your annual profits are less than £50,000, you’ll be subject to a lower limit rate of 19 percent instead of the standard rate of 20%. If your profits fall somewhere in the middle of the lower and upper limits, then you will be subject to a marginal tax rate that is equivalent to 26.5 percent, but you will also be eligible for marginal relief.

How to Register for Corporation Tax

You will be required to register for corporation tax if you intend to begin operations through a limited company. You can make these changes by logging into the HMRC section of the website.

Among the information that will be required from you are the following:

  • Company Name
  • Company Registration Number
  • Start Date of the Business
  • The primary address
  • Classification of a company
  • List of the directors along with their home addresses
You have got to get this done within the first three months of starting your business. It is the responsibility of the director of the company to complete the company’s tax return, submit it, and then pay the tax bill.

You have the option of hiring an accountant to handle this on your behalf; however, the director of the company is ultimately responsible for it from a legal standpoint.

Submitting a tax return for a company

Annually, you are required to prepare a company tax return using form CT600. Additionally, you are required to submit company accounts to HMRC as well as Companies House.

Your tax calculations, as well as the allowances and reliefs that you’ve made use of, are some of the things that you’ll need to include in the CT600. You’ll also need to include your turnover and profit for the reporting period.

After doing so, you will then be informed of the amount of corporation tax that you are required to pay.

Keep in mind that the deadline for filing the tax return for your company is one year after the end of the accounting period that the return covers.

You are required to file a CT600 to declare this situation regardless of whether or not your company is operating at a loss.

If your annual profits are greater than £1.5 million, you will be required to make your payments in instalments rather than all at once. The dates on which these payments are due are determined, among other things, by the size of your company as well as the duration of the accounting period.

Payments are typically expected to be made on the first, 15th, 30th, and 60th days of each quarter for a typical year-long period, with the last two payments due before the end of the accounting period.

The instalments will reflect an estimate of the corporation tax liability due to be paid for that accounting period, and a revision will be required once the ultimate liability is computed following the period’s conclusion.

When is the deadline for paying Corporation Tax?

The deadline for filing Corporation Tax is different from that of other taxes. It is required that you pay it before you file the tax return for your company. This indicates that the date by which it needs to be paid depends on the accounting period used for your corporation tax registration.

Your corporation tax bill must be paid in full nine months and one day after the close of your accounting period during the preceding fiscal year. If your accounting period ends on December 31 each year, then the due date for your bill is October 1.

Making payment

According to the information presented in the preceding paragraph, you will be responsible for paying off your bill by the specified due date. Should you fail to comply with this requirement, you risk incurring fines and other penalties, which will be discussed further on in this post.

Relief you May be Entitled to

The following are some potential avenues to investigate in order to assist you in paying less in corporation tax to the government.


You are eligible to make a claim for certain specific business expenses because they contribute to the smooth operation of your company; consequently, you can calculate the profit of your business by deducting these expenses from your income.

As a direct result of this, you are exempt from paying tax on these items. Check out this post for a comprehensive list of business expenses that are acceptable to HMRC.

The Super Deduction

The Chancellor made the announcement regarding the Super Deduction in the 2021 Budget. This tax break could be available to you and your company if you invest some of the money that your company has set aside for other purposes. If that investment is in qualified plant and machinery after April 1, 2021, then you will be able to deduct that expense from your taxable profits at a rate of 130 percent. This benefit will apply to the cost of the expenditure.

This means that if you spend $100,000 on assets that qualify for the deduction, then you may be able to reduce your overall tax liability by $24,700.

Considering the modifications that will be made to the corporation tax beginning in April 2023, you and your accountant will need to consider the following:

  • What the future prospects are for the profitability of your business in the coming years
  • What kind of an effect will the Super Deduction have on the proportion of those profits that will be taxable as corporate income?
  • Is it worthwhile to bring forward your plans to make an investment?

R&D tax relief

Do you have any projects that are aimed at the creation of new products, processes, or services, or the improvement of those that already exist in such a way that they contribute to advances in science or technology?

If this is the case, you may be eligible for R&D tax relief; click on the link for further information about this topic.

In circumstances such as these, and depending on whether or not you are eligible for the SME scheme, tax relief may be provided in either of two ways.

If your company generates a profit, you may be eligible for tax relief in the form of an increased deduction from taxable profits at a rate of 130 percent of the qualifying R&D expenditure. This deduction helps reduce the amount of tax you owe.

In the event that your company generates a loss, you have the option of handing over all or part of the loss in exchange for a tax credit of 14.5 percent that is refundable from HMRC. This indicates that HMRC is able to make a payment to you in cash.

The Patent Box

If the success of your company can be directly attributed to patented goods, methods, or procedures, you may be able to reduce the amount of tax that you are required to pay.

For profits that can be attributed to patents that generate income in the UK and Europe, the Patent Box Tax Regime enables a reduction in the corporation’s tax liability to a rate of ten percent, bringing the total rate down to ten percent. You can learn more about this by following the link provided above.

The Annual Investment Allowance (AIA)

The Annual Investment Allowance is a tax deduction for capital expenditures, specifically the acquisition of apparatus in the form of tools and machinery. The way it works is that you can deduct this particular expenditure from your taxable profits for the year, but there is a cap on how much you can deduct.

Capital Allowances on Property



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