Dates and Deadlines

Counting the days

Our comprehensive list of important dates and deadlines throughout the tax year can help you keep track of your returns.

With our online tax calendar, you will be able to stay on top of your essential filing dates with HMRC.

31 March 2024

  • Corporation tax

    End of corporation tax financial year.

  • CT61

    End of CT61 quarterly period.

  • Corporation tax return

    Filing deadline for corporation tax return self-assessment form CT600 for period ended 31 March 2023 to be submitted to HMRC.

  • Company accounts filing deadline

    Check your company’s financial year-end. The deadline for both filing your annual accounts and paying your corporation tax bill is usually 9 months after the end of your company’s financial year, while your corporation tax return is due 12 months after the end of the accounting period it covers.

01 April 2024

  • Corporation tax payment

    Corporation tax payment due for year end 30 June 2023, for those companies not liable to pay their liability by installments.

05 April 2024

  • P46 (car) electronic

    Quarter to 5 April 2024.

  • National Insurance Deadline

    Normal deadline to pay voluntary Class 2 or Class 3 NI for 2017/18.

  • Tax Year Ends

    2023/24 tax year ends.

06 April 2024

  • New Tax Year

    2024/25 tax year begins.

07 April 2024

  • VAT return submission and payment (online)

    Month-end or quarter 28 February 2024

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