| 2018 Dates | What’s Due |
| 1 April | Corporation tax for the year to 30/6/2017. |
| 5 April | 2017/18 tax year ends |
| 19 April | Final RTI FPS due by this date. Indicate that this is Final Submission for the Tax Year |
| 19 April | PAYE & NIC deductions and CIS return and tax, for a month to 5/4/18 (due 22/04 if you pay electronically) |
| 1 May | Corporation tax for the year to 31/7/17 |
| 19 May | PAYE & NIC deductions and CIS return and tax, for a month to 5/5/18 (due 22/05 if you pay electronically) |
| 1 June | Corporation tax for the year to 31/8/2017 |
| 19 June | PAYE & NIC deductions and CIS return and tax, for a month to 5/6/18 (due 22/06 if you pay electronically) |
