Tax and business calendar

Details of compliance and regulatory deadlines.

To see expired deadlines, please use the following link: Expired deadlines

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30 Apr 2021

  • Company accounts filing deadline

    Deadline for filing your company tax return is 12 months after your accounting period for corporation tax ends, unless Companies House grants a discretionary three-month extension.

  • Corporation tax return

    Filing deadline for corporation tax return self-assessment form CT600 for period ended 30 April 2020 to be submitted to HMRC.

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Expired deadlines

Details of expired compliance and regulatory deadlines.