When do common recurring tax deadlines fall? What other tax significant events are upcoming? What do I need to remember this month? 

This is a freeview 'At a glance' rolling calendar of common recurring tax deadlines, significant new tax measures and other tax significant events.


October 2026

 

Tax deadlines

Date

Deadline

1

Corporation Tax payment: 31 December 2025 year ends

5

Self Assessment: notify HMRC of 2025-26 Chargeability 

7

VAT return submission and payment (online): month or quarter-end 31 August 2026

14

CT61: return and payment for the quarter ended 30 September 2026

19

PAYE, NIC and CIS payment (postal): month-end 5 October 2026

19

PAYE, NIC and CIS payment (postal): quarter-end 5 October 2026

19

PAYE settlement agreement: payment of 2025-26 Class 1B NIC and tax (postal)

19

CIS return: payments made to subcontractors in the month to 5 October 2026

22

PAYE, NIC and CIS payment (electronic): month-end 5 October 2026

22

PAYE, NIC and CIS payment (electronic): quarter-end 5 October 2026

22

PAYE settlement agreement: payment of 2025-26 Class 1B NIC and tax (electronic)

30

Non-resident landlord scheme: payment of tax for the quarter ended 30 September 2026

31

Plastic Packaging Tax: return and payment quarter-end 30 September 2026

31

Corporation Tax returns: 31 October 2025 year ends

31

Self Assessment: 202526 paper tax returns

Notes

For announcements made at the 2025 Autumn Budget and 2025 Spring Statement, see: 

For more key tax announcements in greater detail see: 

This calendar does not include: