Key Tax Deadlines - September & October 2025
05 Sept, 20251 minuteA number of important tax deadlines are coming up in September and October that you may need...
A number of important tax deadlines are coming up in September and October that you may need to be aware of to avoid incurring any penalties.
Have a look at our ‘dates for your diary’ below to see which dates may apply to you:
Date | What's Due |
01/09 | Corporation tax payment for the year to 30/11/2024 (unless quarterly instalments apply) |
19/09 | PAYE & NIC deductions, and CIS return and tax, for the month to 05/09/2025 (due 22/09/2025 if you pay electronically) |
01/10 | Corporation Tax payment for the year to 31/12/2024 (unless quarterly instalments apply) |
05/10 | Deadline for notifying HMRC of chargeability, if not already within Self Assessment, for 2024/25 |
19/10 | PAYE & NIC deductions, and CIS return and tax, for the month to 05/10/2025 (due 22/10/2025 if you pay electronically) |
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