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More than 5.5 million taxpayers need to complete their return for the tax year 2017 to 2018 before the deadline of 31 January 2019.

Around 5,542,000 taxpayers have less than a month to complete their Self Assessment tax returns before the 31 January 2019 deadline.

More than 11.5 million 2017 to 2018 tax returns are due and HM Revenue and Customs (HMRC) expects the vast majority of taxpayers to complete their returns and pay any tax owed by the end of the month.

About 52% of taxpayers have already filed their returns, as of 31 December 2018, and more than 5 million have completed their returns online (88% of the total returns filed).

If you need to complete a Self Assessment return, see our online guidance.

Financial Secretary to the Treasury, Mel Stride, recently said:

It is encouraging that around 52% of taxpayers have already completed their Self Assessment tax returns. With less than one month to go before the deadline, there are still many people that need to act now.

HMRC is encouraging all Self Assessment filers to complete their returns by 31 January and is offering support every step of the way.

Angela MacDonald, HMRC’s Director General for Customer Services, recently said:

The Self Assessment deadline on 31 January is fast approaching, but there is still time for customers to file their tax returns online and on time to avoid any unnecessary penalties.

If you are completing Self Assessment for the first time or are yet to start your 2017 to 2018 tax return, there is a wide range of support and guidance available on GOV.UK to help at every stage of the tax return process.

Help is also available on GOV.UK, from the Self Assessment phone helpline (0300 200 3310), and on social media.

People need to complete a tax return if they:

• earned more than £2,500 from renting out property
• or their partner received Child Benefit and either of them had an annual income of more than £50,000
• received more than £2,500 in other untaxed income, for example from tips or commission
• are self-employed sole traders
• are employees claiming expenses in excess of £2,500
• have an annual income over £100,000
• earned income from abroad that they need to pay tax on

If customers completed a Self Assessment tax return last year but didn’t have any tax to pay, they still need to complete a 2017 to 2018 tax return unless HMRC has written to them to say it is not required.

Further information

Self Assessment facts:

• 11,564,363 total Self Assessment returns due
• 6,022,579 returns received, as at 31 December 2018
• 5,541,784 returns still to file, as at 31 December 2018
• 5,318,636 returns, as at 31 December 2018, filed online (88% of total filed)
• 703,943 returns, as at 31 December 2018, filed on paper (12% of total filed)

The penalties for late tax returns:

• an initial £100 fixed penalty, which applies even if there is no tax to pay, or if the tax due is paid on time
• after 3 months, additional daily penalties of £10 per day, up to a maximum of £900
• after 6 months, a further penalty of 5% of the tax due or £300, whichever is greater
• after 12 months, another 5% or £300 charge, whichever is greater

There are also additional penalties for paying late of 5% of the tax unpaid at 30 days, 6 months and 12 months.

Tax is automatically deducted from the majority of UK taxpayers’ wages, pensions or savings. For people or businesses where tax is not automatically deducted, or when they may have earned additional untaxed income, they are required to complete a Self Assessment tax return each year.