Tax Diary December 2018/January 2019

1 December 2018 – Due date for Corporation Tax due for the year ended 29 February 2018.
19 December 2018 – PAYE and NIC deductions due for month ended 5 December 2018. (If you pay your tax electronically the due date is 22 December 2018)
19 December 2018 – Filing deadline for the CIS300 monthly return for the month ended 5 December 2018.
19 December 2018 – CIS tax deducted for the month ended 5 December 2018 is payable by today.
30 December 2018 – Deadline for filing 2017-18 self-assessment tax returns online to include a claim for under payments to be collected via tax code in 2019-20.
1 January 2019 – Due date for Corporation Tax due for the year ended 31 March 2018.
19 January 2019 – PAYE and NIC deductions due for month ended 5 January 2019. (If you pay your tax electronically the due date is 22 January 2019)
19 January 2019 – Filing deadline for the CIS300 monthly return for the month ended 5 January 2019.
19 January 2019 – CIS tax deducted for the month ended 5 January 2019 is payable by today.
31 January 2019 – Last day to file 2017-18 self-assessment tax returns online.