Accountant tax adviser -Below are some of the most important HM Revenue & Customs tax dates and deadlines for employers and individuals which arise during the 2015-16 tax year:

Date	Deadline/Action Required
	Accountant tax adviser
6 April 2017	First day of 2017/18 tax year
19 April 2017	Final ‘Full Payment Schedule’ under ‘Real Time Information’ (RTI) due for 2016-17
22 April 2017	Due date for any outstanding PAYE and Class 1 NIC payments for 2016-17 (NB 19 April if paying non-electronically)
31 May 2017	Deadline for issuing form P60 (Certificate of Pay) to employees for 2016-17
6 July 2017	Deadline for filing forms P9D, P11D & P11D(b) in relation to employee benefits for 2016-17
6 July 2017	Last date to provide forms P9D & P11D to relevant employees
19 July 2017	Postal payments of employer Class 1A National Insurance Contributions for 2016-17 must reach HMRC Accounts Office
22 July 2017	Electronic payment of employer Class 1A National Insurance Contributions for 2016-17 must reach HMRC bank account
31 July 2017	Second Self Assessment payment on account due for 2016-17 tax year
1 October 2017	Corporation tax due for companies with a 31 December 2016 year-end (9 months and a day after the end of the accounting period).
5 October 2017	Individuals must notify HMRC of new sources of taxable income arising during 2016-17 where a Tax Return has not been received
31 October 2017	Deadline for PAPER submission of Self Assessment tax returns for 2016-17
1 January 2018	Corporation tax due for companies with a 31 March 2016 year-end
31 January 2018	Deadline for ONLINE submission of Self Assessment tax returns for 2016-17
31 January 2018	Deadline for paying Self Assessment balancing payment for 2016-17
31 January 2018	First Self Assessment payment on account due for 2016-17
31 January 2018	Capital gains tax due for 2016-17
5 April 2018	Last day of the 2016-17 tax year