Key Self Assessment Tax Return
Filing Deadlines, Payment Dates & Late Penalties

Tax Calendar

Key Tax Return Filing Deadlines for 2014/2015

The UK tax year runs from 6th April to the 5th April the next year. Here are the HMRC deadlines for filing your 2014/2015 tax return:

Paper Self Assessment Tax Return Deadline:    31st October 2015
Online Self Assessment Tax Return Deadline:    31st January 2016
Tax Calendar

Tax Return Payment Dates for 2014/2015

Balancing Payment
If your payments on account don't cover this years tax bill then any outstanding tax that you have due must be paid by the following date:

Balancing Payment (2014/2015):    31st January 2016

Payments on Account
If you had more than £1,000 of tax to pay and less than 80% of your other tax liabilities was deducted at source then you will have to make payments on account for your 2015/2016 tax return.

First Payment on Account (2015/2016):    31st January 2016
Second Payment on Account (2015/2016):    31st July 2016
Tax Calendar

Late Filing Penalties

If you are late at filing your paper or your online tax return, HMRC have set fines that you will have to pay. For example if you filed your online tax return on the 1st June 2016 then you would pay £420 in fines!

If filed on/after this date
Paper Tax Return
Online Tax Return
1st November 2015
£100 Fine
No Fine
1st February 2016
£10 a day until it is filed up to a maximum of £900.
£100 Fine
1st May 2016
£300 or 5% of the tax you owe (whichever is greater)
£10 a day until it is filed up to a maximum of £900.
1st November 2016
£300 or 5% of the tax you owe (whichever is greater)
-
1st February 2017 - £300 or 5% of the tax you owe (whichever is greater)
Tax Calendar

Late Payment Penalties

If you are late at paying your tax bill, HMRC have set penalties that you will have to pay if they haven't received payment by these dates:

Date Tax Bill is Still Outstanding
Tax Penalty
3rd March 2016
5% of the tax due
1st August 2016
5% of the tax due
1st February 2017
5% of the tax due
Tax Time Fun Facts
Why is the UK Tax Year to the 5th of April?

The UK is the only country in the world that has a tax year of the 6th April of one year to the 5th April of the next year. The story of this goes back to the year 1582 when Pope Gregory Xiii decided to change the current Julian Calendar to what is now known as the Gregorian calendar. This was due to the calendar after being around for 1600 years causing the date to be 10 days behind the solar calendar.

This was changed all around Europe but the British Empire held out until 1752 which meant that they were 11 days behind everyone else. In September 1752 the date went from the 2nd September to the 14th September to bring it in line with everyone else. The tax year used to start on the 25th March of each year. The treasury didn’t want to lose 11 days tax revenue so pushed the tax year back to start on the 5th April of each year. In the year 1800 due to how the Gregorian Calendar works they were due to lose a day in tax revenue so pushed the start day to the 6th April and it has stayed there ever since!