Company accounts filing deadline

Deadline for filing your company tax return is 12 months after your accounting period for corporation tax ends.

Corporation tax return

Filing deadline for corporation tax return self-assessment form CT600 for period ended 31 December 2018 to be submitted to HMRC.

CT61

End of CT61 quarterly period.

Corporation tax payment

Corporation tax payment due for year-end 31 March 2019, for those companies not liable to pay their liability by instalments.

CT61 payment

Due date for income tax for the CT61 quarter to 31 December 2019.