Self Assessment deadlines: key dates to be aware of

With key dates for Self Assessments coming up fast, Nottingham chartered accountants, Clayton and Brewill, highlights some important deadlines you need to be aware of and explains why it’s a good idea to get your tax return done sooner rather than later.

For those who are self employed, a Self Assessment is the process by which you advise HM Revenue & Customs (HMRC) of your income, gains and relevant expenses for a tax year.

Filling in your Self Assessment

Few people look forward to filing their tax return, whether online or on paper. It’s important to consider which expenses you can claim for, calculate your tax liability and understand when and how to pay any tax that may be due. Recent changes to the dividend allowance and to rental property tax allowances may also affect how you fill out your tax return.

With all this in mind, the process can often feel quite daunting. Seeking professional guidance is a good way to feel assured that you are getting your Self Assessment right. It also helps give you the confidence that you are fully maximising your tax savings.

Key dates and deadlines

There are a number of key tax dates and deadlines to be aware of across the next year:Self Assessment deadlines

  • 31st October 2019 – This is the deadline for those who want to file a paper return rather than filing online
  • 30th December 2019 – This is the deadline for filing your online tax return if you want the tax owed to be through PAYE via your tax code
  • 31st January 2020 – This is the Self Assessment deadline for the tax year ending 5th April 2019. The first payment on account for 2019/20 tax year ending the following April is due.
  • 5th April 2020 – The end of the tax year. Anyone required to file a tax return will receive a notice advising that it must be filed for the tax year just ended.
  • 31st July 2020 – The second payment on account for the 2019/20 tax year is due.

Those who have to submit a Self Assessment tax return should keep a note of these dates. With the 30th December and 31st January creeping up fast, it can be easy to leave things to the last minute and not give yourself enough time to get prepared.

If you miss the deadline for submitting or paying your tax bill, you will get a penalty; submitting your tax bill 3 months late could see you faced with a £100 fine. This will increase the later it is submitted. With this in mind, it’s always a good idea to get your tax return sorted out sooner rather than later.

How we can help

Today, more and more emphasis is being put on taxpayers’ individual responsibilities. Everyone who is subject to taxation will strongly benefit from professional advice and support if they are to minimise their tax burden whilst meeting the compliance requirements. The Clayton & Brewill team can help you to prepare and file your tax return quickly and efficiently. It’ll cost less than you expect – and we might even be able to reduce your tax bill.

We can provide you with friendly, efficient and effective year-round advice on all aspects of personal taxation. This includes practical advice on your personal tax position and the planning opportunities available to you.

 Contact us on 0115 950 3044 or click here to email a member of the team.

Share this post

How can we help?


Whether you are a limited company, a sole trader or partnership, Clayton & Brewill can take care of your accountancy needs, giving you valuable insight and support and leaving you free to concentrate on other areas of your business.

Corporate tax

Clayton & Brewill offers efficient and cost-effective tax advice and support for owner-managed businesses, sole traders and partnerships.

Personal tax

Specialist, personal advice on income tax, capital gains tax and inheritance tax.


Clayton & Brewill can help you comply with your statutory audit requirements as well as working with you to use the annual audit to identify areas for improvement and growth.