5 - End of 2015/16 tax year. Last day to use up your annual exemptions for capital gains tax, inheritance tax and ISA's
14 - Return and payment of CT61 tax due for quarter to 31 March 2016
19 - Deadline for finial submission of the year - 19th April. Penalties for late submission.
19 - PAYE/NIC, student loan and CIS deductions due for month to 5/4/2016 or quarter 4 of 2015/16 for small employers. Interest will run on any unpaid PAYE/NIC for the tax year 2015/16
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 2016