What Is a Service-Level Agreement (SLA)?
A Service-Level Agreement (SLA) is a formal contract between a service provider and a customer that outlines the specific services to be delivered and the performance standards the provider is expected to meet.
A related concept, the Service-Level Commitment (SLC), is broader and less formal. While an SLA is a mutual agreement between two parties, an SLC is a one-way assurance from the provider, stating what level of service customers can expect at any given time.
Why Are SLAs Important?
SLAs are essential for setting clear expectations between service providers—such as cloud providers, network operators, and managed service providers (MSPs)—and their customers. They help:
- Define performance benchmarks and responsibilities
- Clarify liability in cases of outages or service disruptions
- Offer customers a basis for comparing providers and addressing service issues
SLAs often accompany a Master Service Agreement (MSA), which outlines the broader terms and conditions of the business relationship.
The SLA is typically referenced within the service provider’s master service agreement. While the master agreement outlines the overall terms of the relationship, the SLA provides detailed specifications about the services offered and the performance metrics used to evaluate them. Service commitments within the SLA clearly define which services are included in the offering
SLAs originally defined the levels of support that software, hardware, and networking companies would provide to customers running technologies in on-premise data centers and offices.
Summary of Key SLA Metrics
| Metric | Target Value | Description |
|---|---|---|
| Service Uptime | 99.9% monthly | Maximum allowable downtime per month (approx. 43 minutes) |
| Incident Response Time | < 2 hours (critical issues) | Time to acknowledge and begin addressing high-priority incidents |
| Resolution Time | < 8 hours (critical issues) | Time to fully resolve critical service disruptions |
| Support Availability | 24/7/365 | Round-the-clock access to technical support |
| Data Backup Frequency | Daily | Frequency of automated data backups |
| Performance Monitoring | Real-time | Continuous monitoring of system performance and availability |