Taxation August 5, 2026
Tax Diary August/September 2026
Key filing deadlines and payment dates for Corporation Tax, PAYE/NIC, and CIS returns during August and September 2026.
Key Tax Deadlines for August & September 2026
- 1 August 2026: Corporation Tax due for year ended 31 October 2025.
- 19 August 2026: PAYE and NIC deductions due for month ended 5 August 2026 (22 August if paying electronically).
- 19 August 2026: Filing deadline for CIS300 monthly return for month ended 5 August 2026.
- 1 September 2026: Corporation Tax due for year ended 30 November 2025.
- 19 September 2026: PAYE and NIC deductions due for month ended 5 September 2026 (22 September if paying electronically).
- 19 September 2026: Filing deadline for CIS300 monthly return for month ended 5 September 2026.
Disclaimer
The information contained in this article is for general guidance on matters of interest only. It should not be used as a substitute for consultation with professional accounting, tax, legal, or other competent advisers. Before making any decision or taking any action, you should consult a Kingscott Dix professional.