1 September 2018 – Due date for Corporation Tax due for the year ended 30 November 2017.
19 September 2018 – PAYE and NIC deductions due for month ended 5 September 2018. (If you pay your tax electronically the due date is 22 September 2018)
19 September 2018 – Filing deadline for the CIS300 monthly return for the month ended 5 September 2018.
19 September 2018 – CIS tax deducted for the month ended 5 September 2018 is payable by today.
1 October 2018 – Due date for Corporation Tax due for the year ended 31 December 2017.
19 October 2018 – PAYE and NIC deductions due for month ended 5 October 2018. (If you pay your tax electronically the due date is 22 October 2018.)
19 October 2018 – Filing deadline for the CIS300 monthly return for the month ended 5 October 2018.
19 October 2018 – CIS tax deducted for the month ended 5 October 2018 is payable by today.
31 October 2018 – Latest date you can file a paper version of your 2018 self-assessment tax return.