Know your key dates

Here are a few key dates to keep in mind about personal tax returns.

2019-20 tax returns and payments:

The tax year 2019-20 ran from 6 April 2019 to 5 April 2020.
If you need to submit a 2019-20 tax return, the deadline for submitting this online is 31 January 2021. If you submit after this date you'd normally be liable to a £100 penalty, but this year HMRC have announced that no-one will be charged a late filing penalty if they file online by 28 February 2021. Additional penalties could however start to kick in if the tax return is still not submitted after 3 months, 6 months and 12 months.
The deadline for paying the balance of any tax due for the 2019-20 tax year is still  31 January 2021. Don’t delay submitting a tax return just because you can’t pay the tax! 
Late payment penalties (equal to 5% of the tax) usually start to kick in if payment is overdue by 30 days, 6 months and 12 months. But if you are struggling to pay, don’t ignore it - contact HMRC to see if they can agree to a payment plan.

If you’re newly self-employed on or after 6 April 2020:

The good news is that if you were newly self-employed, on or after 6 April 2020, you don’t need to submit a 2019-20 tax return or make a payment in 2021, unless there's some other reason for this.
If you’ve never been registered for self-assessment with HMRC, you’ll need to ensure you're registered by 5 October 2021. untied can help you with this - just read our guide to registration or contact us for help.

2020-21 tax returns and payments:

The 2020-21 tax year runs from 6 April 2020 to 5 April 2021.
If you want to submit a paper tax return to HMRC by post, this needs to be done by 31 October 2021.
The cut-off date for submitting a 2020-21 tax return if you want HMRC to collect any additional tax due via a salary or pension is 30 December 2021.
The 2020-21 tax return submission deadline (for online returns) is 31 January 2022 at midnight. 
If your self-assessment tax bill for 2019-20 was more than £1,000 (and you hadn’t already paid more than 80% of the tax you owe at source, for example via an employment), you’ll also be making payments on account for the 2020-21 tax year on the following dates:
  • 31 January 2021 – your first payment on account for 2020-21 (equal to half your 2019-20 tax bill – including National Insurance if you’re self-employed)
  • 31 July 2021 – a second payment on account for 2020-21
  • 31 January 2022 – a balancing payment of any additional tax due for the 2020-21 year (calculated when you send in your 2020-21 tax return)

If you're struggling to pay your tax bill in 2021 you can apply to set up a payment plan to spread self-assessment bills of up to £30,000 over 12 months at GOV.UK

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