2025 Autumn Budget Summary
27 Nov, 2025
Key Tax Deadlines - December 2025 and January 2026
02 Dec, 20251 minuteA number of important tax deadlines are coming up in December and January that you may need ...
A number of important tax deadlines are coming up in December and January 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 |
| 01/12 | Corporation tax payment for the year to 28/02/2025 (unless quarterly instalments apply) |
| 19/12 | PAYE & NIC deductions, and CIS return and tax, for the month to 05/12/2025 (due 22/12/2025 if you pay electronically) |
| 30/12 | Deadline for filing 2024/25 tax return online if you wish to request that HMRC collect outstanding tax via your PAYE tax code |
| 01/01 | Corporation tax payment for the year to 31/03/2025 (unless quarterly instalments apply) |
| 19/01 | PAYE & NIC deductions, and CIS return and tax, for the month to 05/01/2026 (due 22/01/2026 if you pay electronically) |
| 31/01 | Deadline for filing 2024/25 self-assessment tax return online and paying your outstanding tax for 2024/25 and first payment on account of 2025/26 tax |
