Tax Diary May/June 2026
Key tax dates and deadlines for May and June 2026, including Corporation Tax and PAYE deadlines.
1 May 2026 – Due date for corporation tax due for the year ended 30 July 2025.
19 May 2026 – PAYE and NIC deductions due for month ended 5 May 2026. (If you pay your tax electronically the due date is 22 May 2026).
19 May 2026 – Filing deadline for the CIS300 monthly return for the month ended 5 May 2026.
19 May 2026 – CIS tax deducted for the month ended 5 May 2026 is payable by today.
31 May 2026 – Ensure all employees have been given their P60s for the 2025/26 tax year.
1 June 2026 – Due date for corporation tax due for the year ended 31 August 2025.
19 June 2026 – PAYE and NIC deductions due for month ended 5 June 2026. (If you pay your tax electronically the due date is 22 June 2026).
19 June 2026 – Filing deadline for the CIS300 monthly return for the month ended 5 June 2024.
19 June 2026 – CIS tax deducted for the month ended 5 June 2026 is payable by today.
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.