Residual risk

 Residual risk is the amount of risk that remains after an organization has applied all possible controls and mitigation measures to reduce inherent risk within its processes, activities, or systems.

Definition

• Residual risk is the leftover risk after taking steps to manage, treat, or control an identified risk.

• It reflects the reality that no risk management strategy or control can fully eliminate every possible threat or vulnerability.

Calculation

• The formula for residual risk is:

  Residual Risk=Inherent Risk−Impact of Risk Controls\text{Residual Risk} = \text{Inherent Risk} - \text{Impact of Risk Controls}Residual Risk=Inherent Risk−Impact of Risk Controls

  This means organizations first assess the inherent risk and then evaluate how much it has been reduced by the implemented controls.

Examples

• Even after installing firewalls and anti-malware tools, a company still faces residual risk of cyberattacks from sophisticated hackers.

• Using seat belts in a car reduces risk, but some risk of injury in an accident still remains, which is the residual risk.

• Construction safety protocols can lower the chance of injury, but not remove it entirely.

Importance

• Organizations must recognize residual risk to decide if the remaining level of risk is acceptable or requires further treatment.

• Managing residual risk is essential for regulatory compliance and for informed decision-making about risk tolerance and insurance needs.

In summary, residual risk is the risk that persists after all mitigation efforts, and understanding it is key to strategic risk management and compliance.

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2. https://www.techtarget.com/searchsecurity/definition/residual-risk
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4. https://uk.indeed.com/career-advice/career-development/what-is-residual-risk
5. https://advisera.com/27001academy/knowledgebase/why-is-residual-risk-so-important/
6. https://www.upguard.com/blog/residual-risk
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8. https://ocro.stanford.edu/enterprise-risk-management-erm/key-definitions/definition-residual-risk
9. https://www.tn.gov/content/dam/tn/finance/accounts/Inherent-vs-RisidualRisk.pdf
10. https://hyperproof.io/resource/residual-risk-definition/