| Date | What’s Due |
| 1 October | Corporation tax for year to 31/12/23 unless you pay by quarterly instalments. |
| 5 October | Deadline for notifying HMRC of chargeability for 2023/24 if not within Self-Assessment and receive income or gains on which tax is due. i.e. to register for Self-Assessment. |
| 19 October | PAYE & NIC deductions, and CIS return and tax, for month to 5/10/24 (due 22 October if you pay electronically). |
| 1 November | Corporation tax for year to 31/01/2024, unless quarterly instalments apply. |
| 19 November | PAYE & NIC deductions, and CIS return and tax, for month to 5/11/24 (due 22/11 if you pay electronically). |
not all accountants are grey...
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