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Self assessment - key dates

2019/20
2018/19

31 January 2019 - First payment on account due for 2018/19 tax year.

31 July 2019 - Second payment on account for 2018/19 tax year.

5 October 2019 - Deadline for notifying HMRC of new sources of income (including the Child Benefit charge) if no tax return has been issued for 2018/19 tax year.

31 October 2019 - Deadline for submission of 2018/19 non-electronic returns.

30 December 2019 - Deadline for submission of 2018/19 electronic tax returns if 'coding out' of any underpayment is required.

31 January 2020 - Deadline for filing electronic tax returns for 2018/19. Balancing payment due for 2018/19 tax year. First payment on account due for 2019/20 tax year.

31 January 2018 - First payment on account due for 2017/18 tax year.

31 July 2018 - Second payment on account for 2017/18 tax year.

5 October 2018 - Deadline for notifying HMRC of new sources of income (including the Child Benefit charge) if no tax return has been issued for 2017/18 tax year.

31 October 2018 - Deadline for submission of 2017/18 non-electronic returns.

30 December 2018 - Deadline for submission of 2017/18 electronic tax returns if 'coding out' of any underpayment is required.

31 January 2019 - Deadline for filing electronic tax returns for 2017/18. Balancing payment due for 2017/18 tax year. First payment on account due for 2018/19 tax year.