1 December 2022 – Due date for Corporation Tax payable for the year ended 28 February 2022.

19 December 2022 – PAYE and NIC deductions due for month ended 5 December 2022. (If you pay your tax electronically the due date is 22 December 2022).

19 December 2022 – Filing deadline for the CIS300 monthly return for the month ended 5 December 2022. 

19 December 2022 – CIS tax deducted for the month ended 5 December 2022 is payable by today.

30 December 2022 – Deadline for filing 2021-22 self-assessment tax returns online to include a claim for under payments to be collected via tax code in 2023-24.

1 January 2023 – Due date for Corporation Tax due for the year ended 31 March 2022.

19 January 2023 – PAYE and NIC deductions due for month ended 5 January 2023. (If you pay your tax electronically the due date is 22 January 2023).

19 January 2023 – Filing deadline for the CIS300 monthly return for the month ended 5 January 2023. 

19 January 2023 – CIS tax deducted for the month ended 5 January 2023 is payable by today.

31 January 2023 – Last day to file 2021-22 self-assessment tax returns online.

31 January 2023 – Balance of self-assessment tax owing for 2021-22 due to be settled on or before today unless you have elected to extend this deadline by formal agreement with HMRC. Also due is any first payment on account for 2022-23.