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Zero Trust Downtime Cost Estimator

The Zero Trust Downtime Cost Estimator quantifies the business cost of a security-related service disruption and the portion that zero trust resilience measures may avoid. It combines affected users, lost productivity, revenue impact, incident-response expense, and recovery cost over the estimated outage duration.

The estimate can support resilience planning, architecture prioritization, and incident scenarios involving compromised access paths or segmented services. It is most useful when the organization separates direct downtime effects from broader breach costs and uses realistic assumptions for the population and systems affected.

Calculator inputs

hours
users
USD
%
USD
USD
%
Result
—
Residual downtime cost
Gross downtime cost—
Estimated avoided cost—
Productivity cost—

1. Enter outage duration
Use the elapsed period during which affected services or access paths cannot support normal work.

2. Define the affected population
Enter the number of users materially disrupted and their loaded hourly labor cost.

3. Estimate productivity loss
Use the average percentage of productive time lost during the outage.

4. Add revenue and response impacts
Enter revenue impact per hour plus one-time response and recovery cost.

5. Apply expected downtime reduction
Estimate how much zero trust architecture reduces outage duration or scope, then review residual and avoided cost.

Productivity cost = Hours × Affected users × Labor cost × Productivity loss Gross downtime cost = Productivity cost + (Hours × Revenue impact per hour) + Response cost Residual cost = Gross downtime cost × (1 − Downtime reduction)

The model assumes the reduction percentage applies to the total modeled cost. For a more detailed study, reduce duration, affected users, or cost components separately.

What the result means

The main result is the estimated downtime cost remaining after the modeled reduction attributed to zero trust resilience.

Avoid double counting revenue and labor effects when lost revenue already includes the same productivity impact.

Given: 8 hours of downtime, 500 users, $48 loaded labor cost, 65% productivity loss, $30,000 revenue impact per hour, $75,000 response cost, and 30% downtime reduction.

Calculation: Productivity cost = 8 × 500 × $48 × 0.65 = $124,800. Gross cost = $124,800 + (8 × $30,000) + $75,000 = $439,800. Residual cost = $439,800 × 0.70 = $307,860.

Result: The estimated residual downtime cost is $307,860.

What should loaded labor cost include?

Use wages plus employer taxes and benefits, and optionally allocated overhead if that is consistent with your internal costing method.

How do I estimate productivity loss during partial service?

Use the average share of work that cannot be completed, not simply the percentage of systems unavailable.

Can revenue impact be zero?

Yes. For internal services with no measurable near-term revenue effect, model productivity and recovery costs only.

Does downtime reduction mean a shorter outage?

It can represent shorter duration, smaller scope, or both. The calculator applies it as a single overall cost reduction.

Should reputational damage be included?

Only when you have a defensible monetary estimate and it is not already included in another loss component.