Corporation Tax — service availability and issues
Updated 18 December 2024
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Service availability
If you’re trying to create, sign in or reset your user ID or password, check for known problems with Government Gateway.
Sign in to Corporation Tax online.
Planned downtime
None.
Service issues
We are aware of delayed responses with CT600 online returns on 13 December 2024 and 16 December 2024, and are now working to resolve this.
If you experience a delay with your online return submission response you should keep polling for the HMRC business response. If you have not received a response after 72 hours contact the online service helpdesk.
We apologise for any inconvenience.
Find out about changes and issues that may affect how you use the Corporation Tax online service to file your Company Tax Return.
Other services
Check availability and issues for other services.