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Tax Calendar: Important Dates & Deadlines
March - April 2019

Now updated with April dates, here's a list of important tax dates and deadlines for the coming months.

March 2019

  • 1st - 2017/18 Self Assessment payment now 30 days late = 5% charge on the tax owing on that day.
  • 31st - Closing date to claim for the Winter Fuel Benefit for this year.
  • March - Last minute tax planning. Double check you have availed of all relevant allowances/ exemptions for capital gains tax, inheritance tax, ISA's and pension. Check out our article on making the most of your annual allowances.

Below dates relevant for Employers only.

  • 1st - Last chance to pay any balance of 2018/19 tax and Class 4 NICs to avoid an automatic 5% late payment penalty.
  • 1st - New advisory fuel rates for users of company cars effective from today.
  • 19th (22nd if paid electronically) - PAYE, Nat. Ins.,Student Loan & CIS monthly deductions due. Last day to send in Employer Payment Summary's (EPS) for month ended 5th March.

April 2019 - End of Tax Year - Use up your allowances!

  • 5th - End of 2017/18 tax year. Last chance to avail of annual exemptions for capital gains tax, inheritance tax, pension allowances and ISA's
  • 5th - Last chance to use up any unused pension allowance from 2015/16; or to claim back any overpaid tax from 2014/15; or to top up your NI contributions for the sake of your state pension for 2012/13.
  • 6th - New tax year commences as do any tax changes such as the increase in the basic personal allowance to £11,850
  • 6th - HMRC issue Self Assessment Returns and Notices to Complete a Return for the year to 5 April 2019.
  • 30th - Last chance to avoid the £10 a day additional penalty on outstanding 2017/18 Self Assessment tax return.

Below dates relevant for Employers only

  • 6th - Employers must check their payroll software incorporates the 2018-19 changes from today. Also make sure any relevant changes to employees tax codes for the 2019/20 year have been made.
  • 19th - Your final Full Payment Submission (FPS) for the 2017-18 year should be returned by today. 
  • 19th (22nd if paid electronically) - 1st quarter PAYE/Nat. Ins. payments due for period 6th Jan to 5th April 2018.
  • 19th (22nd if paid electronically) - PAYE, Nat Ins, Student Loan & CIS monthly deductions due.
  • 19th (22nd if paid electronically) - Interest is charged on any outstanding PAYE/CIS from 2017/18.

If there are any relevant tax dates we are not presently including in our tax calendar, please feel free to contact us to request their inclusion.

This article was published in our Tax Calendar section on 01/03/2019.

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