GOV.UK
Self Assessment tax returns
4. Deadlines
There are deadlines for sending your Self Assessment tax return to HM Revenue and Customs (HMRC) and paying any money you owe.
The last tax year started on 6 April 2013 and ended on 5 April 2014.
| Self Assessment | Deadline |
|---|---|
| Register for Self Assessment | You should register by 5 October 2014 |
| Paper tax returns | Midnight 31 October 2014 |
| Online tax returns | Midnight 31 January 2015 |
| Pay the tax you owe | Midnight 31 January 2015 |
There’s an additional payment deadline of 31 July if you make advance payments towards your bill (known as ‘payments on account’).
You’ll usually pay a penalty if you’re late. You can appeal against a penalty if you have a reasonable excuse.
When the deadline is different
Send your online return by 30 December if you want HMRC to automatically collect tax you owe from your wages and pension. You must be eligible.
Send a paper tax return by 31 January if you’re a trustee of a registered pension scheme or a non-resident company. You can’t send a return online.
HMRC might also write to you giving you a different deadline.
2012 to 2013 tax year and earlier
The Self Assessment deadline for these tax years has passed. Send your tax return or payment as soon as possible - you’ll have to pay a penalty.