What does 99.99% SLA mean in practice?

99.99% = 52.6 minutes downtime/year = 4.38 minutes/month = 1 minute/week. Achieving this requires redundant infrastructure in multiple AZs with automated failover completing in <1 minute.

How much does four-nines infrastructure cost?

Moving from 99.9% to 99.99% typically doubles infrastructure cost. The increase is justified for services where each minute of downtime costs >$1,000 in revenue.

What companies offer 99.99% SLAs?

AWS, GCP, and Azure offer 99.99% SLAs for managed services like S3 and Cloud Storage. Kubernetes control planes typically target 99.9-99.95%.

SLA 99.99% Downtime Minutes Calculator

Calculate allowed downtime for 99.99% four-nines SLA: 52.6 minutes/year, 4.38 minutes/month. Model infrastructure requirements and cost to achieve four-nines reliability.

AI & SaaS Tools

SaaS Metrics

AI Compute

AI ROI

LTV:CAC Ratio

ARPU ($/month)

Monthly Churn %

CAC ($)

Gross Margin %

LTV

$3500

LTV:CAC

11.67

Payback

2.9 mo

Health

Healthy ✓

Benchmark: LTV:CAC ≥ 3 is healthy. Payback under 12 months is excellent. Under 1 means you lose money on each customer.

How to Use

Enter the values for the scenario you are assessing. Calculate allowed downtime for 99.99% four-nines SLA: 52.6 minutes/year, 4.38 minutes/month. Model infrastructure requirements and cost to achieve four-nines reliability. Use the sla 99.99% downtime result to inform your calculation.

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Frequently Asked Questions

What does 99.99% SLA mean in practice?

How much does four-nines infrastructure cost?

What companies offer 99.99% SLAs?