Tax Return For Small Businesses

UK Tax Deadlines 2020/2021: Key Dates To Remember

Tax Returns Advice For Small Businesses

From self assessment tax return deadline to registration cut-off, we share the key dates to look out for when filing tax returns. Never miss tax returns deadlines again. Here are the most important dates you need to remember to avoid missing your self assessment tax returns deadlines:

31 January 2021

Midnight on this day is the deadline for getting all your online tax returns to HMRC for the 2019-2020 tax year. This is also the date you need to have paid your tax bill by, and self-employed people filing tax returns will need to make their first payment by this date for the 2020-2021 tax year.

6 April 2021

This is the first day of the new tax year, meaning that any new tax rates and regulations announced in the Chancellor’s budget (due in March) will be enforced. It is also the date after which you can file your 2020-2021 tax return.

31 July 2021

The second payment for self-employed people (who use payment on account) will be due at midnight on this date.

5 October 2021

This is the deadline for registering for self assessment. If you want to submit a self assessment tax return for the 2020-2021 tax year, you need to have registered by 5 October.

31 October 2021

HMRC’s deadline for submitting paper tax returns is 31 October. If you miss the deadline, you can always submit your returns online instead (they aren’t due until 31 January).

Never Miss UK Tax Return Deadlines: Penalties for late return

People could face a charge of £100 for paying their tax just a day after the deadline. If you waited three months after the deadline to pay, you could face a fine of up to £1,000.

If you paid your tax six months late, you could face an added £300 fine on top of the earlier fines – or five per cent of your tax bill (whichever is greater).

In the most serious cases, you could be fined 100 per cent of the tax you owe on top of your original tax bill.

How to submit your tax return?

You can register with HMRC online if you’ve never submitted a tax return before. Once that is sorted, there are two different ways you can submit your tax return – on paper or online.

If you choose paper, you will have to fill out tax return forms by hand and post them to HMRC. If you choose online, you can submit returns on the HMRC website.

Online tax returns come with a series of advantages, including later deadlines and the ability to amend mistakes easily. Once registered with HMRC, you will be able to go back to a tax return you’ve already started, check your details, view returns and print your tax calculation.

Remember that you’ll need to register for self assessment again if you’ve sent a tax return in the past but you did not have to send one last year.

Looking for tax returns help? At Prosper Bailey Accountants, we are experienced Chester accountants for small businesses. We offer accounting, payroll and tax return services to our clients all over Chester, Manchester and the neighbouring areas. For more details, please get in touch us at

1 thought on “UK Tax Deadlines 2020/2021: Key Dates To Remember”

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