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DDoS Attack Risk Exposure Estimator

This estimator expresses DDoS risk exposure as an annualized monetary amount. It combines the annual probability of a material attack with estimated outage loss, response expense, and customer or contractual impact for one event.

The result can help operations and security teams compare DDoS exposure with other technology risks or with the cost of mitigation. Because the calculation uses a single-event impact, organizations facing multiple attacks should model annual frequency separately or create several scenarios. The estimate is intended for planning and prioritization, not as a guarantee of future loss.

Scenario inputs

%
USD
USD
USD
Result
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Annualized DDoS risk exposure
Total loss per event—
Monthly equivalent exposure—
Outage share of event loss—

1. Estimate annual event probability
Enter the chance of at least one DDoS event severe enough to meet your materiality definition.

2. Enter outage loss
Include revenue, productivity, and operational loss caused by service disruption.

3. Add response expense
Include incremental mitigation, investigation, provider, and engineering costs.

4. Add customer and contract impact
Include credits, penalties, churn, and customer remediation that are not already counted.

5. Review annual exposure
Use the result as a risk-comparison metric and test alternative probability and impact assumptions.

Loss per Material Event = Outage Loss + Response Expense + Customer and Contract Impact

Annualized Risk Exposure = Annual Event Probability × Loss per Material Event

What the result means

The result is the expected annual loss associated with the modeled material DDoS event.

Avoid combining this result with another expected-loss figure for the same scenario, which would count the risk twice.

Given:

  • Annual event probability: 30%
  • Outage and transaction loss: $240,000
  • Response expense: $45,000
  • Customer and contract impact: $80,000

Calculation:
Loss per event = $240,000 + $45,000 + $80,000 = $365,000
Annualized exposure = 0.30 × $365,000 = $109,500

Result: The annualized DDoS risk exposure is $109,500.

How is this different from expected annual DDoS loss?

This calculator models the probability and impact of one material annual event. A frequency model can represent multiple expected attacks and disruption rates.

What probability period should I use?

Use a 12-month probability so it aligns with the annualized result.

Can outage loss include delayed revenue?

Include only the economic loss you expect to remain after delayed transactions and recoveries are considered.

What if contract penalties have a cap?

Use the expected amount after applying the relevant cap and probability that the penalty will be triggered.

Why show a monthly equivalent?

It provides a budget comparison, but it does not mean the risk occurs evenly each month.