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Cybersecurity Risk Assessment Calculator

Calculate annualized loss expectancy (ALE) using FAIR-based risk analysis with threat frequency, vulnerability, and control effectiveness.

Inputs

$
/year
%
%
%

Results

Annualized Loss Expectancy

$60,000.00

≈ 5 years of state college

Single Loss Expectancy$300,000.00
Loss Event Frequency0.2/year
Risk Score4
Risk Level1
Residual Vulnerability20%
Recommended Security Spend$6,000.00
How to Use This Calculator
  1. Enter each identified threat with its likelihood (1-5) and potential impact (1-5) ratings.
  2. Set the current control effectiveness percentage for each threat.
  3. Review the residual risk score after controls and the overall risk rating.
  4. Prioritize threats with residual risk scores above your organization risk tolerance threshold.
  5. Use the risk register output to drive your annual security roadmap and budget allocation.

How the result changes with Control Effectiveness

Control EffectivenessAnnualized Loss Expectancy
10$135,000.00
35$97,500.00
65$52,500.00
90$15,000.00

What each input means

Asset Value
Total value of the asset or data at risk.
Threat Frequency
Expected threat events per year (e.g., attack attempts).
Vulnerability
Likelihood that a threat exploits the vulnerability (0-100%).
Control Effectiveness
Effectiveness of existing security controls (0-100%).
Impact Severity
Percentage of asset value lost per incident.

What each result means

Annualized Loss Expectancy
Expected annual loss from this risk (ALE = LEF × SLE).
Single Loss Expectancy
Expected loss per incident.
Loss Event Frequency
Expected successful attacks per year.
Risk Score
Risk matrix score (1-25).
Risk Level
1=low, 2=medium, 3=high, 4=critical.
Recommended Security Spend
Suggested annual security investment (~10% of ALE).

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Asset Value = 1000000, Threat Frequency = 1, Vulnerability = 50, Control Effectiveness = 60 = 5 input(s) provided
  2. Calculate Annualized Loss Expectancy
    Annualized Loss Expectancy = lossEventFrequency * singleLoss
    60000 = $60,000
  3. Calculate Single Loss Expectancy
    Single Loss Expectancy = assetValue * (impactPct / 100)
    300000 = $300,000
  4. Calculate Loss Event Frequency
    Loss Event Frequency = threatFrequency * effectiveVulnerability
    0.2 = 0.2

Engine last updated . Checked against 1 independently-derived test — how we verify calculators.

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