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.

Corporation Tax payment

Corporation tax payment due for year-end 31 March 2023, for those companies not liable to pay their liability by instalments.

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 2022 to be submitted to HMRC.