Tax Diary September/October 2021

1 September 2021 – Due date for Corporation Tax due for the year ended 30 November 2020.

19 September 2021 – PAYE and NIC deductions due for month ended 5 September 2021. (If you pay your tax electronically the due date is 22 September 2021)

19 September 2021 – Filing deadline for the CIS300 monthly return for the month ended 5 September 2021.

19 September 2021 – CIS tax deducted for the month ended 5 September 2021 is payable by today.

1 October 2021 – Due date for Corporation Tax due for the year ended 31 December 2020.

19 October 2021 – PAYE and NIC deductions due for month ended 5 October 2021. (If you pay your tax electronically the due date is 22 October 2021.)

19 October 2021 – Filing deadline for the CIS300 monthly return for the month ended 5 October 2021.

19 October 2021 – CIS tax deducted for the month ended 5 October 2021 is payable by today.

31 October 2021 – Latest date you can file a paper version of your 2021 self-assessment tax return.