Tax Diary February/March 2026
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1 February 2026 – Due date for Corporation Tax payable for the year ended 30 April 2025.
19 February 2026 – PAYE and NIC deductions due for month ended 5 February 2026. (If you pay your tax electronically the due date is 22 February 2026)
19 February 2026 – Filing deadline for the CIS300 monthly return for the month ended 5 February 2026.
19 February 2026 – CIS tax deducted for the month ended 5 February 2026 is payable by today.
1 March 2026 – Due date for Corporation Tax due for the year ended 31 May 2025.
2 March 2026 – Self-Assessment tax for 2024-25 paid after this date will incur a 5% surcharge unless liabilities are cleared by 1 April 2026, or an agreement has been reached with HMRC under their time to pay facility by the same date.
19 March 2026 – PAYE and NIC deductions due for month ended 5 March 2026 (If you pay your tax electronically the due date is 22 March 2026).
19 March 2026 – Filing deadline for the CIS300 monthly return for the month ended 5 March 2026.
19 March 2026 – CIS tax deducted for the month ended 5 March 2026 is payable by today.
