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 unless liabilities are cleared by 1 April 2025, or an agreement has been reached with HMRC under their time to pay facility by the same date.

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

19 March 2025 – Filing deadline for the CIS300 monthly return for the month ended 5 March 2025.

19 March 2025 – CIS tax deducted for the month ended 5 March 2025 is payable by today.

1 April 2025 – Due date for corporation tax due for the year ended 30 June 2024.

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

19 April 2025 – Filing deadline for the CIS300 monthly return for the month ended 5 April 2025.

19 April 2025 – CIS tax deducted for the month ended 5 April 2025 is payable by today.

30 April 2025 – 2023-24 tax returns filed after this date will be subject to an additional £10 per day late filing penalty for a maximum of 90 days.