March
1 New advisory fuel rates applicable from this date.
2 Last day to pay any balance of 2015/16 tax and NICs to avoid an automatic 5% late payment penalty.
31 End of corporation tax financial year.
End of CT61 quarterly period.
Filing date for Company Tax Return Form CT600 for period ended 31 March 2016.
April
5 Last day of 2016/17 tax year.
Deadline for 2016/17 ISA investments.
Last day to make disposals using the 2016/17 CGT exemption.
14 Due date for income tax for the CT61 period to 31 March 2017.
19/21 Quarter 4 2016/17 PAYE/Class 1 NICs remittance due.
May
1 Start of daily penalties for 2015/16 online Self Assessment Tax Return not yet filed. Additional penalties may apply for further delay.
3 Submission date of P46 (Car) for quarter to 5 April.
31 Last day to issue 2016/17 P60s to employees.
