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Tax Calendar: Important Dates & Deadlines January - February 2018

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

January 2018

  • Jan 31st- Deadline for online return of your 2016/17 self assessment form. £100 fine if its late regardless of whether tax owing or not. See our Self Assessment Guide for tips on making your return.
  • Jan 31st - Balance of 2016/2017 tax return due, also first payment on a/c of 2017/2018.
  • Jan 31st - Supplementary 2016/17 forms P35 to be filed, and any liabilities paid, if corrections were required under IR35 rules. (Contractors)
  • Jan 31st - Last chance to renew tax credits for 2017/18 tax year.
  • Jan 31st - Deadline to make any amendments to 2015/16 tax return.
Below dates relevant for Employers only
  • Jan 19th (22nd if paid electronically) - PAYE, Nat. Ins.,Student Loan & C.I.S. Monthly deductions due.
  • Jan 19th, (22nd if paid electronically) - 4th quarter PAYE / Nat. Insurance payments due for period 6th Oct to 5th Jan2018.

Note January 31st is a standard HMRC deadline for various claims and returns, for employers, employees and self employed. We only list the main ones, but make sure you do not miss this deadline.

February 2017

  • Feb 1st - A £100 fine if 2016/17 self assessment return not filed, whether tax due or not. A 5% surcharge (or £300 fine, which ever is greater) on bal. of any outstanding self assessment tax owed from 15/16, due to have been paid by 31st Jan 2017. See our guide onSelf Assessment fines and penalties.
  • Feb 1st - For outstanding paper returns, the £10 a day penalty starts adding up from midnight on the 1st Feb. If you make an online return, this late penalty will be applied from May 1st at midnight.
  • Feb 14th - Last feasible date to request NIC deferment for 2017/18.
  • Feb 28th - Last chance to avoid paying the first 5% surcharge on bal. of any outstanding self assessment tax owed from 16/17, due to have been paid by 31st Jan 2018.
Below dates relevant for Employers only
  • Feb 2nd - Last date to submit P46 (car) to notify Revenue of any changes to employees car fuel benefit in previous quarter.
  • Feb 19th (22nd if paid electronically) - PAYE, Nat. Insurance, Student Loan & C.I.S. monthly deductions due. Last day to send in Employer Payment Summary's (EPS) for month ended 5th Feb.

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 31/01/2018.

Some Guides you may be interested in

  • A guide to expenses for Contractors As a contractor, working through your own limited company, one of the main benefits available to you is the ability to claim business expenses. Claiming expenses correctly can reduce your tax bill, it’s a vital part of running your company tax efficiently.
  • 7 reasons you could have the wrong Tax Code Your Tax Code tells your employer how much tax to take off your pay. What if your code is wrong? In the past 4 years, 1 in 3 employed taxpayers have been overcharged tax because their employer has received the wrong code from HMRC!
  • IR35 - A contractors guide for 2018/19 IR35 is a complex piece of legislation used to distinguish between true self-employed contractors and employees. As a contractor, it’s important that you have an awareness and understanding of IR35 to ensure that you’re paying the correct amount of tax and National Insurance. Here’s a definitive introduction to IR35 to help you understand how it works.
  • Making Tax Digital for Landlords There's every chance that you are not yet aware of Making Tax Digital (MTD). However, if you are a landlord with rental income - (that's income, not profit) – greater than £10,000 annually then you should be. MTD is the biggest shake up to the UK tax system since the advent of Self-Assessment in the 1990s. And it affects you, from April 2020 at least.
  • Contractors - LTD Company v Umbrella? What are the benefits for contractors of setting up a Limited Company vs Umbrella Company? Read our guide, see how much you could take home in each setup.
  • Capital Gains Tax on Rental Property (Buy-to-let) 2018 Whether it's primary residence relief, letting relief, or even the costs of improvement works, our resident landlord and property tax editor, Iain King has the information you need to reduce your CGT liability.
  • 14 Reasons why you may be due a tax refund Almost 1 in 3 PAYE employees may have paid too much tax. We have put together a list of 14 reasons why you might be owed money by HMRC.
  • Avoid paying too much tax on rental income Our resident landlord tax expert, Iain Rankin, has put together a great guide on how to reduce the amount of tax paid on income from your rental property
  • Buy-to-let Landlords - Most Common Tax Mistakes Many new or aspiring landlords will often read, with alarm, about a campaign or some form of crackdown by HMRC on buy-to-let landlords, accompanied by warnings that landlords could potentially face tax bills of “thousands of pounds” plus interest, surcharges and penalties. What is it though that HMRC are actually looking for? Here’s an overview of the main categories of mistakes.
  • Landlord Tax Guide In our detailed Landlord Tax Guide, our experts tell you what you can claim in expenses and a comprehensive insight into HMRC tax rules

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