Dates and Deadlines

30 December 2023

  • Online self-assessment (PAYE)

    Deadline for online submission of self-assessment tax returns for tax year ended 5 April 2023 for HMRC to collect tax through PAYE codes, where they owe less than £3,000.

31 December 2023

  • Corporation tax return

    Filing deadline for corporation tax return self-assessment form CT600 for period ended 31 December 2022 to be submitted to HMRC.

  • Company accounts filing deadline

    Deadline for filing your annual accounts is 9 months after your company’s financial year ends.

  • CT61

    End of CT61 quarterly period.

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