Self assessment - key dates
2023/24
31 January 2023 - First payment on account due for 2022/23 tax year.
31 July 2023 - Second payment on account for 2022/23 tax year.
5 October 2023 - Deadline for notifying HMRC of new sources of income (including the Child Benefit charge) if no tax return has been issued for 2022/23 tax year.
31 October 2023 - Deadline for submission of 2022/23 non-electronic returns.
30 December 2023 - Deadline for submission of 2022/23 electronic tax returns if 'coding out' of eligible underpayment is required.
31 January 2024 - Deadline for filing electronic tax returns for 2022/23. Balancing payment due for 2022/23 tax year. First payment on account due for 2023/24 tax year.
2022/23
31 January 2022 - First payment on account due for 2021/22 tax year.
31 July 2022 - Second payment on account for 2021/22 tax year.
5 October 2022 - Deadline for notifying HMRC of new sources of income (including the Child Benefit charge) if no tax return has been issued for 2021/22 tax year.
31 October 2022 - Deadline for submission of 2021/22 non-electronic returns.
30 December 2022 - Deadline for submission of 2021/22 electronic tax returns if 'coding out' of eligible underpayment is required.
31 January 2023 - Deadline for filing electronic tax returns for 2021/22. Balancing payment due for 2021/22 tax year. First payment on account due for 2022/23 tax year.