Electronic monthly PAYE/class 1 NICs/student loan payment
If paying electronically, pay PAYE, class 1 NICs, student loan deductions and deductions from payments to subcontractors for the month up to the 5th of this month.
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.