Guidance

Corporation Tax technical specifications: CT600 appendices

Appendices for Corporation Tax Online software developers.

Documents

Appendix C: Annual Investment Allowance version 3.9

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Details

Appendices for Marginal Rate Relief validation and Annual Investment Allowance.

Related guidance

Rates, allowances and limits for Corporation Tax
Find rates, allowances and limits for Corporation Tax.

Published 1 January 2014
Last updated 7 September 2022 + show all updates
  1. Appendix C of the Annual Investment Allowance has been updated to version 3.9.

  2. Appendix C of the Annual Investment Allowance has been updated with version 3.8.

  3. Appendix C of the Annual Investment Allowance has been updated with version 3.7.

  4. Appendix C of the Annual Investment Allowance has been updated with version 3.6.

  5. Appendix A removed and replaced with a link to Corporation Tax rates.

  6. Appendix C of the Annual Investment Allowance has been updated with version 3.3.

  7. Appendix A: rates of tax version 2.5 has been published.

  8. Appendix A and Appendix B have been updated to include Corporation Tax rates/fractions from April 2015.

  9. Appendix C Annual Investment Allowance version 3.2 has been published.

  10. First published.