Tax Diary August/September 2025
1 August 2025 - Due date for corporation tax due for the year ended 31 October 2024.
19 August 2025 - PAYE and NIC deductions due for month ended 5 August 2025 (If you pay your tax electronically the due date is 22 August 2025)
19 August 2025 - Filing deadline for the CIS300 monthly return for the
Tax Diary July/August 2025
1 July 2025 - Due date for corporation tax due for the year ended 30 September 2024.
6 July 2025 - Complete and submit forms P11D return of benefits and expenses and P11D(b)
Tax Diary March/April 2025
1 March 2025 - Due date for Corporation Tax due for the year ended 31 May 2024.
2 March 2025 - Self-Assessment tax for 2023-24 paid after this date will incur a 5% surcharge