Validate assumptions
Compare revenue/hour, labor burden, outage history, support invoices, SLA terms, and recovery staffing against finance, HR, operations, and ticketing records.
IT Perfection · Business continuity calculator
IT Downtime Cost Calculator
Estimate the direct and productivity cost of an IT outage, view a low-to-high planning range, and translate a single incident into annual financial exposure.
Created by Ali Hassani, CISO — 25+ years of IT, cybersecurity, compliance, and infrastructure experience.
Quantitative inputsDocumented formulasScenario rangeClient-side only
Important: This calculator is for initial planning guidance only. It does not replace a professional business impact analysis, cybersecurity audit, compliance assessment, penetration test, legal/compliance review, or validated disaster recovery exercise.
Formula summary:
productivity loss = employees × affected % × loaded hourly cost × duration × productivity-loss %; revenue impact = revenue/hour × duration × revenue-affected %; recovery labor = responders × hours × rate; outage cost = productivity + revenue + recovery labor + direct costs + contractual costs; annual exposure = outage cost × incidents/year.Use the estimate as a decision input
Model critical systems separately
Run distinct scenarios for identity, Microsoft 365, line-of-business applications, network connectivity, servers, cloud workloads, and customer-facing platforms.
Test recovery capability
Confirm recovery time and cost through restore tests, tabletop exercises, dependency reviews, escalation drills, and post-incident evidence—not estimates alone.
IT Perfection planning report
Downtime cost executive summary
$0Estimated cost per outage
$0–$0Low-to-high planning range
$0Estimated annual exposure
Cost components
Priority next steps
- Validate business and financial assumptions with the process owner and finance.
- Map the scenario to documented RTO/RPO targets and actual application dependencies.
- Test restore, failover, communication, and manual-workaround procedures.
- Compare remediation options by expected risk reduction, implementation cost, owner, and validation evidence.
Professional note: The estimate excludes impacts that are not entered, such as long-term customer loss, regulatory consequences, safety impact, litigation, reputational harm, and cascading supplier disruption.
Turn the estimate into a resilience plan
What to check
Backup coverage, immutable/offline copies, tested restores, network and identity dependencies, vendor escalation, spare equipment, monitoring, runbooks, and recovery decision authority.
Why it matters
Outage cost becomes actionable only when tied to recovery targets, responsible owners, validated controls, and funded improvement work.
Business impact
A defensible range helps leadership compare prevention and recovery investments with the likely cost of service interruption.
Related guidance and resources
Free IT management toolsContact IT PerfectionCISA ransomware and resilience resourcesMicrosoft Azure reliability guidance
Frequently asked questions
Is this a business impact analysis?
No. It is an initial quantitative planning model. A formal business impact analysis validates processes, dependencies, impact categories, time sensitivity, recovery priorities, and executive-approved assumptions.
Should I enter revenue or contribution margin?
Contribution margin is often the more conservative economic-loss input because it removes variable costs that may not be incurred during an outage. Use the measure your finance team approves and document it in the scenario name or working papers.
Why is a low-to-high range included?
Downtime inputs are rarely exact. The uncertainty control exposes that limitation and helps leadership compare options without treating a single estimate as a guaranteed outcome.
