File your accounts and Company Tax Return
Use this service to file your company or association’s:
- Company Tax Return (CT600) for Corporation Tax with HM Revenue and Customs (HMRC)
- accounts with Companies House
- Company Tax Return and accounts at the same time if they’re for the same accounting period
The service will automatically convert your accounts to the required format (iXBRL).
If you’re a charity or unincorporated association
You should:
- use this online service to file a tax return with HMRC
- use filing software to file your accounts online with Companies House
If you’re a community interest company
You should:
- use this online service to file a tax return with HMRC
- use the Companies House online service to file your accounts
There’s a different process if you need to file your confirmation statement (annual return) with Companies House.
File your accounts and tax return online
Use this service to file a tax return with HMRC and your accounts with Companies House.
Before you start
To use this service you’ll need your:
- Company’s annual accounts - they must be ‘balanced’, so your total assets should match what you owe
- Government Gateway user ID and password - if you do not have a user ID, you can create one when you first use this service
- Companies House password and authentication code (if you’re filing your accounts at the same time) - you get these when you register with Companies House
Other ways to file
You can only use the paper form (CT600) if either:
- you’re unable to file online because you have a reasonable excuse
- you want to file in Welsh
You must also fill in and post form WT1 to explain why you’ve used the paper form.