Key Tax Deadlines - November and December 2025

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A number of important tax deadlines are coming up in November and December that you may need...

By JS .

A number of important tax deadlines are coming up in November and December 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

01/11

Corporation tax payment for the year to 31/01/2025 (unless quarterly instalments apply)

19/11

PAYE & NIC deductions, and CIS return and tax, for the month to 05/11/2025 (due 22/11/2025 if you pay electronically)

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