The deadline for submitting your 2016/17 self-assessment return and the balance of your 2016/17 liability, together with the first payment on account for 2017/18 are due on 31 January 2018.
This deadline is relevant to individuals who need to complete a self-assessment tax return and make direct payments to HMRC in respect of their income tax, Classes 2 and 4 NI, capital gains tax and High Income Child Benefit Charge liabilities.
There is a penalty of £100 if your return is not submitted on time, even if there is no tax due or your return shows that you are due a tax refund.
The balance of any outstanding income tax, Classes 2 and 4 NI, capital gains tax and High Income Child Benefit Charge for the year ended 5 April is due for payment by 31 January 2018. Where the payment is made late, interest will be charged.
The first payment on account for 2017/18 in respect of income tax and any Class 4 NI or High Income Child Benefit Charge is also due for payment by 31 January 2018.
If we have already dealt with your self-assessment return on your behalf, you need take no action.