1 October

• Corporation tax payments due for accounting year ending 31 Dec 2024.

5 October

• Self-assessment registration deadline if you have worked as a sole trader or self-employed in the 24/25 tax year.

7 October

• VAT quarterly return for period ending 31 August 2025. Taxpayers with this deadline have VAT quarters ending Feb, May, Aug & Nov.

22 October

• Monthly deadline for electronic remittance to HMRC of PAYE, NIC, CIS.

31 October

• Self-assessment filing deadline for submission by post for 24/25 tax year.