Self assessment deadlines and penalties for 2013-2014

The new tax year is upon us and if you must file tax in the UK, make note of the self assessment deadlines for the 2013-2014 tax year which ended on the 5th April 2014. If you don’t…

5 Minute Read

Last Updated: 23rd June 2014

The new tax year is upon us and if you must file tax in the UK, make note of the self assessment deadlines for the 2013-2014 tax year which ended on the 5th April 2014. If you don’t file your tax return before the self assessment deadline, HMRC will issue you with penalties. The self assessment deadline for paper tax returns to reach HMRC is by midnight on 31st October 2014.

The online self assessment tax returns deadline is 31st January 2015 and you can start filing your taxes on 6th April 2014. If you haven’t applied for your Unique Taxpayer Reference (UTR) yet, then ask the SimpleTax wizard now! It’s free, quick and super simple to use. But be quick, your UTR can take up to 6 weeks to arrive, so you should apply for your UTR before 20th December to ensure it arrives in time.


In the words of Benjamin Franklin – “the only things certain in life are death and taxes.”

Inevitably, the taxman will always catch up with you and you may be facing some nasty penalties if you miss the self assessment tax return deadline. The penalty system is fairly easy to understand; the longer you delay, the more you pay. So what could you be looking at if you file too late? Here’s a simple breakdown of the penalties:

  • 1 day late – £100 fine.
  • 3 months late – The £100 above plus £10 for each further day that you are late, that’s up to a potential £900 in fines.
  • 6 months late – All of the penalties above plus £300 or 5% of tax due (whichever is higher).
  • 12 months late – All penalties above plus £300 or 5% of tax due.

If you’re 12 months late, you could face a penalty of up to £1,600. That’s serious cash. SimpleTax wants to save you time and money when it comes filing your self-assessment. Register with SimpleTax today to make taxes less taxing.

Meeting your self assessment deadlines is a serious matter, so don’t delay.

Access SimpleTax and discover a new free way of filing your return (HMRC approved), know what expenses will help you lower your tax bill and keep all your records online, safe & sound. Ready to file with one click! Free means free. No hidden costs.

View our Guide to Self Assessment Tax Returns

Trusted by over 20,000 subscribers

You don't need to be an expert to complete your self assessment tax return.

Find Out More

Blog content is for information purposes and over time may become outdated, although we do strive to keep it current. It's written to help you understand your Tax's and is not to be relied upon as professional accounting, tax and legal advice due to differences in everyone's circumstances. For additional help please contact our support team or HMRC.

5 Excellent Reasons to Choose Us

Discover how to make tax returns a doddle...

Find out more

Non-domicile tax rules: what will change from April 2025?

02 May 2024

In March 2024, Jeremy Hunt announced in his spring budget speech that the government would scrap the UK’s current non-dom tax regime and replace…

What if HMRC contacted you about income you’ve earned from selling online?

02 May 2024

If you’re not doing it, you probably know someone who is. Selling stuff via Facebook, eBay, Amazon, Etsy, Vinted and other online marketplaces has…

How to keep track of your side hustle income and expenses

16 Apr 2024

Some believe it’s 15%, others say it’s 25% or even as high as 33%. Whatever the truth, a significant percentage of people in the…

How GoSimpleTax Works


Simply register for free with your full name and email address.

Select Your Income

Select the income you receive and follow the hints and tips for potential tax savings.

Validate Your Information

Validate your personal information and submit directly to HMRC to get confirmation in just seconds.


Work Anywhere, With Any Device

Gone are the days of fretting over a calculator surrounded by scraps of paper at the eleventh hour.

GoSimpleTax’s tax return software uses the information you upload in real time to calculate your income and expenditure, working out the tax you owe and sending you helpful notifications when there’s the possibility of a mistake.

Start your free trial

"The software is intuitive and proved very easy to navigate. I found the whole process refreshingly simple. I saved a lot of money too!"

Steve J.

Ordained Presbyter

"Easy to use and value for money. Everything you need to do your tax."

Gordon J.

Self Employed

"It fills in all the forms and sends them to the Inland Revenue. Not expensive either. Takes the stress out of doing your tax return online."

Ross G.

Team Rector

5 reasons to use GoSimpleTax >