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Tax Calendar: Important Dates & Deadlines
July - August 2018

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

July 2018

  • 31st The Second payment on a/c due 2017/18
  • 31st Annual Declaration (renewal of tax credits). You must return your Tax Credit pack forms to HMRC by this date. More Info
  • 31st Last day to pay any tax owing on 2016/17 Self Assessment before 1st August (when it is 6 months late) = £300 fine or 5% of the tax owing, which ever is greater.

Below dates are relevant for Employers only

  • 5th Last date to agree PAYE settlements with HMRC for 2017/18 if any owing.
  • 6th Employers must return form 42 (share incentives) and any new tax credits they qualify for by this date.
  • 6th Forms 9D, 11D and 11D(b) to do with employees benefits and expenses, to be returned by this date and a copy given to each employee.
  • 19th (22nd if paid electronically) Class 1A Nat. Ins for 2017/18 (form 11D returned by 6th of this month- employees benefits) due to be paid.
  • 19th (22nd if paid electronically) PAYE, Nat. Ins.,Student Loan & C.I.S. Monthly deductions due.
  • 19th, (22nd if paid electronically) 2nd quarter PAYE/Nat. Ins. payments due for period 6th April to 5th July 2018.

August 2018

Please Note: August 19th is a Sunday so electronic manual payments need to be cleared by Friday 17th

  • August 2nd Second 5% charge on any unpaid tax owed on 2015/16 Self Assessment Return, plus a further £300 fine or 5% of the tax owing (which ever is greater), for those who still have not submitted their return.

Below dates are relevant for  Employers only

  • August 2nd Deadline to notify HMRC of changes to employees car/fuel benefit (P46) from previous quarter.
  • August 17th (22nd  if paid electronically) PAYE, Nat. Ins.,Student Loan & C.I.S. Monthly deductions due.

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.