Online self-assessment (PAYE)
Deadline for online submission of self-assessment tax returns for tax year ended 5 April 2017 for HMRC to collect tax through PAYE codes, where they owe less than £3,000.
Corporation tax return
Filing deadline for corporation tax return self-assessment form CT600 for period ended 31 December 2016 to be submitted to HMRC.
CT61
End of CT61 quarterly period.
Company accounts filing deadline
Deadline for filing your financial statements/accounts with Companies House is 9 months after the period end.
Corporation tax payment
Corporation tax payment due for year end 31 March 2017, for those companies not liable to pay their liability by instalments.