- Corporation Tax forms
- Claiming losses, allowances and reliefs
- Corporation Tax rates table
Corporation Tax forms
Here you'll find the Corporation Tax forms your company or organisation may need to complete and send to HM Revenue & Customs (HMRC).
The forms are available to view, download and/or print. Alternatively, if you need several paper copies, they are available from the HMRC Orderline.
Some forms can be sent to HMRC online using either the free Corporation Tax Online service or approved commercial software packages. This guide tells you what you can do online and where to get more information.
On this page:
- Downloading Corporation Tax forms
- Forms for new companies
- Forms for previously dormant companies
- The Company Tax Return form - CT600
- Form to authorise a tax agent or adviser
- More useful links
Downloading Corporation Tax forms
Corporation Tax forms are available to view, download and/or print from this guide. But the design of these forms makes them unsuitable for dot matrix printers.
They are available as Adobe Acrobat Documents (PDF). To view the PDF files you must have Adobe Reader installed on your computer.
Alternatively, if you need several paper copies, they're also available from the HMRC Orderline.
Read more about PDFs and download Adobe Acrobat Reader
Request forms from the HMRC Orderline
Forms for new companies
HMRC sends newly-formed companies an Introductory Pack within six weeks of being told by Companies House that a new company exists. This pack contains Corporation Tax forms and explanatory notes. If you didn't receive this pack or you no longer have it, you can download the forms you need here.
You should use forms CT41G (New company details) or CT41G (Dormant company insert) to tell HMRC that your new company is active (for example trading) or dormant (for example not trading). You can find help in the CT41G (Notes).
You should use form CT41G (Clubs) to tell HMRC your new club is active.
CT41G (New company details) (PDF 45K)
CT41G (Dormant company insert) (PDF 32K)
CT41G (Notes) - Notes for new companies (PDF 36K)
Trading and non-trading for Corporation Tax explained
Forms for previously dormant companies
You should use form CT204 (Review) to decide whether your company or organisation has to deliver a Company Tax Return.
Use form CT204 (Active company) to tell HMRC that your previously dormant company or organisation is now active. You can find help to complete this form in the CT204 (Notes).
CT204 (Active company) (PDF 71K)
Trading and non-trading for Corporation Tax explained
The Company Tax Return form - CT600
File your Company Tax Return online
From 1 April 2011, for any accounting period ending after 31 March 2010, all Company Tax Returns must be filed online with accompanying accounts and computations in XBRL format.
Corporation Tax Online: the benefits and how to sign up
Go to Corporation Tax Online now
Forms for accounting periods ending on or after 1 April 2008
If you don't send your return online, you can download and use these forms to deliver your Company Tax Return for Corporation Tax accounting periods ending on or after 1 April 2008 (including claims for new capital allowances).
You can find help and guidance in the CT600 guide.
CT600 (2008) Version 2 - the Company Tax Return form (PDF 47K)
CT600 (Short) (2008) Version 2 - the short Company Tax Return form (PDF 87K)
CT600 Guide (2009) Version 2 - the guide to the Company Tax Return form (PDF 193K)
CT600 Budget insert 2009 - details of changes (PDF 35K)
Forms for accounting periods from 1 April 2004 to 31 March 2008
If you don't send your return online, you can download and use these forms to deliver your Company Tax Return for Corporation Tax accounting periods ending on or after 1 April 2004 up to and including 31 March 2008.
You can find help and guidance in the CT600 guide.
CT600 (2007) Version 2 - the Company Tax Return form (PDF 251K)
CT600 (Short) (2007) Version 2 - the short Company Tax Return form (PDF 236K)
CT600 Guide (2007) Version 2 - the guide to the Company Tax Return forms (PDF 1.5MB)
CT600 Budget Insert 2007 - details of what is changing (PDF 437K)
CT600 Supplementary Pages
These forms can be used along with CT600 (Version 2) forms for any Corporation Tax accounting period ending on or after 1 April 2004.
CT600A (2006) - Loans to participators by close companies (PDF 38K)
CT600B (2006) - Controlled foreign companies (PDF 80K)
CT600C (2006) - Group and Consortium (PDF 28K)
CT600D (2006) - Insurance (PDF 25K)
CT600E (2006) - Charity and Community Amateur Sports Clubs (CASCs) (PDF 28K)
CT600F (2006) - Tonnage Tax (PDF 26K)
CT600G (2006) – Corporate Venturing Scheme (PDF 26K)
CT600H (2006) – Cross-border Royalties (PDF 22K)
CT600I (2006) – Supplementary charge in respect of ring fence activity (PDF 27K)
CT600J (2006) – Disclosure of tax avoidance schemes Supplementary Pages (PDF 24K)
Forms for accounting periods ending before 1 April 2004
Use CT600 (Version 1) forms for accounting periods ending before 1 April 2004
Form to authorise a tax agent or adviser
You can use Corporation Tax Online to authorise HMRC to communicate with your tax representative about your company or organisation's tax affairs.
Alternatively, download and complete form 64-8 and send it to your Corporation Tax Office.
Appointing someone to deal with your Corporation Tax affairs
Download 64-8 - Agent authorisation form (PDF 111K)
Find your Corporation Tax Office
