October

1 October         

Corporation tax due for accounting periods ended 31 December 2023 where not payable by instalments

5 October         

Deadline for registering for self assessment for 2023–24 to notify HMRC of chargeability to income tax and/or capital gains tax

7 October         

VAT returns and payments due for month or quarter ended 31 August 2024

14 October       

Corporation tax instalment payments due for large companies as follows: