Specialist Tax News

Diary of main tax events August / September 2025

Date What’s Due
1 August Corporation Tax for year to 31/10/2024, unless quarterly instalments apply
19 August PAYE & NIC deductions, and CIS return and tax, for month to 05/08/2025 (due 22/08 if you pay electronically)
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)