Guidance

Corporation Tax technical specifications: CT600 appendices

Appendices for Corporation Tax Online software developers.

Documents

Appendix C: Annual Investment Allowance version 3.7

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Details

Appendices for Marginal Rate Relief validation and Annual Investment Allowance.

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

Published 1 January 2014
Last updated 19 March 2019 + show all updates
  1. Appendix C of the Annual Investment Allowance has been updated with version 3.7.
  2. Appendix C of the Annual Investment Allowance has been updated with version 3.6.
  3. Appendix A removed and replaced with a link to Corporation Tax rates.
  4. Appendix C of the Annual Investment Allowance has been updated with version 3.3.
  5. Appendix A: rates of tax version 2.5 has been published.
  6. Appendix A and Appendix B have been updated to include Corporation Tax rates/fractions from April 2015.
  7. Appendix C Annual Investment Allowance version 3.2 has been published.
  8. First published.