Key Dates For The UK Tax Year


Aside from the main end of tax year date of 5th April, there are several other key dates throughout the year that both employed and self-employed workers need to be aware of.

Here we outline the key dates for the forthcoming 2018/2019 tax year.


5 April 2018
Deadline for claiming your PAYE tax refund for the 2013/14 tax year.

6 April 2018
First day of the new tax year 2018/19.

31 May 2018
Copies of 2017/18 P60 documents issued to employees.

6 July 2018
Copies of 2017/18 P11d documents issued to employees.
Last date for agreeing payment settlements agreements for 2016/17 if applicable.

6 April 2019
End of tax year 2018/19


5 April 2018
Deadline for claiming tax overpaid for the 2013/14 tax year under self-assessment.

6 April 2018
First day of the new tax year 2018/19.
Time to gather detailed documents for your 2017/18 tax return and if you’re self-employed or have income from property in the year ended 5 April 2016.

31 July 2018
Deadline for 2nd payment on account for tax year ending 5 April 2018.

5 October 2018
Deadline to register with the HMRC if you became self-employed or started receiving income from property. You should submit a form CWF1 for self-employment or form SA1 for non-self-employed income to HMRC.

31 October 2018 (midnight)
Deadline for paper self-assessment returns for 2018/19 tax year.

30 December 2018
Deadline for online submission of self-assessment tax returns for year ending 5 April 2017 for HMRC to collect employment or pension income tax through PAYE tax codes where they owe less than £3,000.

31 January 2019 (midnight)
Deadline for online self-assessment tax returns for 2017/18 tax year.
Deadline for paying tax bill for tax year ending 5 April 2017/18.

5 April 2019
End of tax year 2018/19.

The Financial Conduct Authority does not regulate taxation and trust advice.



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