Our UK Corporation Tax Calculator

Posting to HMRC

Find out how much your small business will be sending to the tax man with our simple corporation tax calculator for UK businesses in 2019 / 2020.


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    Would you like to pay more tax to HMRC?

    Yes, that’s right, more tax 😄. Ok, maybe not quite ‘like’, but you’re liable to pay more tax when you generate more revenue. So increasing your company’s revenue is the result of an increase in your sales and profit margins. That’s where we (Reldesk) can help. Reldesk manages your customers, prospects and sales pipeline, maintaining relationships with existing customers, and helping you find new ones. It also shows you who your most valuable customers are. Find out more or Sign up for a demo on how it can help your business.

    A Few Frequently Asked Questions on Corporation Tax

    What is corporation tax?

    It’s a tax on company profits and is paid every year, based on your company tax accounting period. It’s also usually your company’s financial year (which can be different to the normal tax year).

    In some ways, corporation tax is to businesses what income tax is to individuals. As a small business you pay corporation tax on net profits by generally doing the business, but also investing and selling assets as a company.

    What is the current corporation tax rate? (2019/2020)

    The Corporation Tax main rate (excluding ring fence profits) is currently at 19% for 2019/20 and has been for years starting 1 April 2017, 1 April 2018 and 1 April 2019.

    Who has to pay corporation tax?

    If you do business as any of the following, you will have to ensure you pay corporation tax:

    • A registered limited company
    • A foreign company that has a UK office/branch
    • A club, co-operative of any ofther unincorporated associated (like a community group or a sports club)

    What will the corporation tax rate be in 2020?

    For the tax year starting 1 April 2020 (so 2020/21) it will be reduced from 19% to 17%. This was announced by the government in the 2016 budget.

    When is the corporation tax deadline?

    You must file a corporation tax return before 12 months has passed since the end of the accounting period it covers, otherwise you’ll have to pay a penalty. However, you must pay your corporation tax bill (if an amount is payable), usually 9 months and 1 day after the end of the accounting period.

    How is UK corporation tax calculated?

    It’s calculated using the percentage for the tax year (shown above) and applied to taxable profits

    Do personal service companies pay corporation tax?

    Yes, personal service companies such as contractor limited companies are required to pay it on their profits.

    Where can I find more information on Corporation Tax?

    The HMRC have more information on corporation tax rates, registration and more.