| Date | What’s Due |
| 1 January | Corporation tax for year to 31/3/2023 unless quarterly instalments apply. |
| 19 January | PAYE & NIC deductions, and CIS return and tax, for month to 5/1/24 (due 22/1 if you pay electronically). |
| 31 January | Deadline for filing 2022/23 self-assessment tax return online, paying your outstanding tax for 2022/23 and first payment on account of 2023/24 tax. |
| 1 February | Corporation tax for year to 30/4/2023 unless quarterly instalments apply. |
| 19 February | PAYE & NIC deductions, and CIS return and tax, for month to 5/2/24 (due 22/2 if you pay electronically). |
