1 March

Deadline for payment of any outstanding income and capital gains tax in respect of personal tax returns for 2016/17 to avoid 5% surcharge (last date to avoid surcharge is 30 days after 31 January)

19 March

Deadline for filing online CIS return for month ended 5 March

19 March

PAYE cheque payments for month ended 5 March to reach HMRC (22 March for electronic payments)

31 March

End of corporation tax financial year

5 April

Last day of the 2017/18 tax year and the deadline for various tax claims and elections as well as use of capital gains tax annual allowances and use of annual limit for pension contributions.

5 April  

Last date to register to payroll benefits in kind for 2018/19