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Key Dates & Deadlines

Payment Dates
Income Tax and National Insurance Contributions
31 July 2017 2016/17 second payment on account
31 January 2018 2016/17 balancing payment, and 2017/18 first payment on account
31 July 2018 2017/18 second payment on account
31 January 2019 2017/18 balancing payment, and 2018/19 first payment on account
Class 1A NICs
19 July 2017 2016/17 payment due
Capital Gains Tax
31 January 2018 2016/17 Capital Gains Tax
31 January 2019 2017/18 Capital Gains Tax
Corporation Tax
9 months and one day after the end of the accounting period (or by quarterly instalments if large company)
Inheritance Tax
6 months after the end of the month of death.
For chargeable lifetime transfers, due date is six months after the end of the month in which the transfer was made.
Latest Filing/Issuing Deadlines - 2016/17 PAYE Returns
31 May 2017 Issue P60s to employees
6 July 2017 P11D and P11Db - also issue copies to employees
Deadline for employment related securities
2017 Self Assessment Tax Return (SATR)
31 October 2017 Last filing date - paper returns (SATR Paper Version)
30 December 2017 SATR Online if outstanding tax subject to cap to be included in 2018/19 PAYE code
31 January 2018 Last filing date - online returns (SATR Online)