Tax Diary November/December 2025

Posted on 8 October, 2025 in Tax Advisory and Planning

1 November 2025 - Due date for Corporation Tax due for the year ended 31 January 2025.

19 November 2025 - PAYE and NIC deductions due for month ended 5 November 2024. (If you pay your tax electronically the due date is 22 November 2025.)

19 November 2025 - Filing deadline for the CIS300 monthly return for the month ended 5 November 2025.

19 November 2025 - CIS tax deducted for the month ended 5 November 2025 is payable by today.

1 December 2025 - Due date for Corporation Tax payable for the year ended 28 February 2025.

19 December 2025 - PAYE and NIC deductions due for month ended 5 December 2025. (If you pay your tax electronically the due date is 22 December 2025).

19 December 2025 - Filing deadline for the CIS300 monthly return for the month ended 5 December 2025.

19 December 2025 - CIS tax deducted for the month ended 5 December 2025 is payable by today.

30 December 2025 - Deadline for filing 2024-25 self-assessment tax returns online to include a claim for under payments to be collected via tax code in 2026-27.

Source: HM Revenue & Customs Wed, 08 Oct 2025 00:00:00 +0100

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