1 October
Due date for payment of Corporation Tax for period ended 31 December 2023.
5 October
Deadline for notifying HMRC of new sources of taxable income or gains or liability to the High Income Child Benefit Charge for 2023/24 if no tax return has been issued.
14 October
Due date for income tax for the CT61 quarter to 30 September 2024.
19 October
Tax and NICs due under a 2023/24 PAYE Settlement Agreement.
PAYE, Student loan and CIS deductions are due for the month to 5 October 2024.
PAYE quarterly payments are due for small employers for the pay periods 6 July 2024 to 5 October 2024.
31 October
Deadline for submitting ‘paper’ 2023/24 self assessment returns.