Corporation Tax for Company Tax Return (CT600 (2024) Version 3)
Use this form for accounting periods starting on or after 1 April 2015.
Documents
Details
Use form CT600 (2024) Version 3 for accounting periods starting on or after 1 April 2015.
This form has been updated in readiness for when a Northern Ireland Executive together with the UK government decide to introduce a devolved rate. See Northern Ireland Corporation Tax regime: draft guidance for more information. Entries must not be made in any of the Northern Ireland boxes until a Northern Ireland rate has been introduced.
More information about How to complete a Company Tax Return is available, which includes a full list of companies that should use this form.
Check if you need to submit this form before downloading and sending it in the post.
Find out more about who must submit an online Company Tax Return.
Supplementary pages
CT600A (2015) Version 3: close company loans and arrangements to confer benefits on participators
CT600C (2018) Version 3: group and consortium relief
CT600D (2015) Version 3: insurance
CT600E (2015) Version 3: Charities and Community Amateur Sport Clubs (CASCs)
CT600F (2023) Version 3: Tonnage Tax
CT600H (2015) Version 3: cross-border Royalties
CT600I (2019) Version 3: supplementary charge in respect of ring fence trades
CT600J (2015) Version 3: disclosure of tax avoidance schemes
CT600K (2017) Version 3: Restitution Tax
CT600L (2022) Version 3: Corporation Tax: research and development
CT600M (2024) Version 3: Freeports and Investment Zones
CT600N (2023) version 3: Residential Property Developer Tax
Related forms and guidance
Use the Company Tax Return guide (CT600 Guide (2024) Version 3) to help you complete form CT600 (2024) Company Tax Return.
Use the Autumn Budget 2023 — overview of tax legislation and rates (OOTLAR) for an overview of the main Budget changes affecting Corporation Tax.
Use form 64-8: authorise your agent to authorise HMRC to communicate with an accountant, tax agent or adviser acting on your behalf.
Updates to this page
Published 7 April 2015Last updated 6 April 2024 + show all updates
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English and Welsh versions of Corporation Tax for Company Tax Return (CT600 (2024) Version 3) have been added.
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English and Welsh versions of Corporation Tax: Company Tax Return (CT600 (2023) Version 3) have been added.
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Added translation
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Corporation Tax: research and development (CT600L (2022) version 3) has been added.
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Corporation Tax: research and development (CT600L (2021) version 3) has been added.
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The Corporation Tax for Company Tax Return (CT600 (2021) Version 3) has been added.
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English and Welsh versions of the Corporation Tax for Company Tax Return (CT600 (2020) Version 3) have been updated.
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Welsh version of Corporation Tax for Company Tax Return (CT600 (2019) Version 3) has been updated.
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English and Welsh versions of Corporation Tax: Company Tax Return (CT600 (2019) Version 3) have been added.
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Corporation Tax: Company Tax Return (CT600 (2018) Version 3) has been added.
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English version of the October 2017 Company Tax Return (CT600 version 3) has been added.
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The Company Tax Return (CT600 version 3) has been updated to incorporate the reform of Corporation Tax loss relief.
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New version Corporation Tax: Company Tax Return (CT600 (2017) Version 3) has been added.
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First published.