Tax Diary March/April 2018

1 March 2018 – Due date for corporation tax due for the year ended 31 May 2017.

2 March 2018 – Self assessment tax for 2016/17 paid after this date will incur a 5% surcharge.

19 March 2018 – PAYE and NIC deductions due for month ended 5 March 2018. (If you pay your tax electronically the due date is 22 March 2018)

19 March 2018 – Filing deadline for the CIS300 monthly return for the month ended 5 March 2018.

19 March 2018 – CIS tax deducted for the month ended 5 March 2018 is payable by today.

1 April 2018 – Due date for corporation tax due for the year ended 30 June 2017.

19 April 2018 – PAYE and NIC deductions due for month ended 5 April 2018. (If you pay your tax electronically the due date is 22 April 2018)

19 April 2018 – Filing deadline for the CIS300 monthly return for the month ended 5 April 2018.

19 April 2018 – CIS tax deducted for the month ended 5 April 2018 is payable by today.

30 April 2018 – 2016-17 tax returns filed after this date will be subject to an additional £10 per day late filing penalty.

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