| Date | What’s Due |
| 1 September | Corporation Tax for year to 30/11/2024, unless quarterly instalments apply |
| 19 September | PAYE & NIC deductions, and CIS return and tax, for month to 05/09/2025 (due 22/09 if you pay electronically) |
| 1 October | Corporation Tax for year to 31/12/2024, unless quarterly instalments apply |
| 5 October | Deadline for notifying HMRC of chargeability, if not already within Self-Assessment, for 2024/25 |
| 19 October | PAYE & NIC deductions, and CIS return and tax, for month to 05/10/2025 (due 22/10 if you pay electronically) |
not all accountants are grey...
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