5 – End of 2016/17 tax year. Last day to use up your annual exemptions for capital gains tax, inheritance tax and ISA’s

6 – Start of the 207/18 tax year

14 – Return and payment of CT61 tax due for quarter to 31 March 2017

19/22 – PAYE/NIC, student loan and CIS deductions due for month to 5/4/2017 or quarter 4 of 2016/17 for small employers. Interest will run on any unpaid PAYE/NIC for the tax year 2016/17

30 – Additional daily penalties of £10 per day up to a maximum of £900 for failing to file self-assessment tax return due on 31 January 2017