The online filing deadline is 31 January. Registration can take between seven and 10 days, so make sure you register early to allow yourself plenty of time to file.
If you file your return after the deadline, HMRC will charge you a £100 penalty. You’ll have to pay this even if:
- your return is just a day late
- you have no tax to pay
- you pay all the tax you owe on time.
If your return is even later, you’ll also be charged the following penalties:
- Over three months late – a penalty of £10 for each additional day that it's late, for a maximum of 90 days (£900).
- Over six months late – an additional £300, or 5% of the tax due if this is higher.
- Over 12 months late – a further £300, or a further 5% of the tax due if this is higher, or up to 100% of the tax due if you deliberately withhold information to prevent HMRC from assessing your liability. This could be up to 200% if the income or gains not being declared arise outside the UK.
NOTE: If you miss the paper filing deadline (31 October) you can still file your return online as long as you haven’t already filed a paper return.
We strongly recommend online filing because:
- it is secure and convenient
- calculations are done for you automatically
- on-screen help is available if you need it
- you get an immediate acknowledgement that HMRC have received your return.
For further information, please see the link to the HMRC website for Self Assessment Deadlines.