Free Website Tool

ISO 27001 Risk Score Calculator

Describe a risk, score likelihood and impact, consider existing controls and compare the residual risk using a transparent 5×5 method.

Tool summary

Method
Likelihood × Impact
Assessments
Inherent and residual
Storage
Current browser session
Access
Available free

Structured assessment

Build a consistent risk record

Work through five clear steps, then add the result to a professional session register.

Step 1

Describe the Risk

Risk statement

Step 2

Assess Inherent Risk

Impact →
Likelihood →

Step 3

Consider Existing Controls

Step 4

Assess Residual Risk

Step 5

Treatment Decision

Session output

Risk Register

Build a working register for this browser tab.

RiskOwnerInherent RiskExisting ControlsResidual RiskTreatmentDecision

Practical guidance

Use risk scoring consistently

Likelihood × impact provides a transparent comparison method; ISO 27001 does not mandate this exact matrix. Define criteria appropriate to your context, record existing controls, and retain the judgement behind treatment and acceptance decisions.

Connect the output to your ISMS