Impact details for each ISO 27001 control

Please note that impact details of ISO 27001 controls, and impacts of not implementing them, will depend on the results of your risk assessment (i.e., which impacts and likelihood are related to the risks), the controls you decide to apply (some controls may be more effective when used together), and applicable legal requirements (even if there are not relevant risks you may need to implement a control due to a legal requirement). Since these depend on the context of each organization, it is unfeasible to define a generic overview.

These articles will provide you a further explanation about impact and requirements identification:

• How to identify ISMS requirements of interested parties in ISO 27001 https://advisera.com/27001academy/blog/2017/02/06/how-to-identify-isms-requirements-of-interested-parties-in-iso-27001/
• How to assess consequences and likelihood in ISO 27001 risk analysis https://advisera.com/27001academy/iso-27001-risk-assessment-treatment-management/#assessment