SLA meaning in business: SLA stands for service level agreement. It is a written commitment that defines the level of service a provider will deliver, such as 99.9% uptime or replying to support tickets within four hours, and what happens if those targets are missed. SLAs are used between companies and their customers, and between teams inside a company.
What does SLA mean at work?
An SLA turns a vague promise like “great support” into measurable targets. If you buy software, hire an IT provider or outsource customer service, the SLA tells you exactly what to expect.
A typical SLA includes:
- Services covered: what the provider is responsible for
- Metrics and targets: uptime, response time, resolution time or accuracy
- Measurement: how and how often performance is tracked
- Remedies: service credits, refunds or other consequences if targets are missed
- Exclusions: what doesn’t count, such as scheduled maintenance
- Responsibilities: what the customer must do, such as reporting issues through the right channel
SLAs are often part of a larger contract, such as a master service agreement (MSA).
Inside companies, teams use internal SLAs too. For example, IT might promise to respond to laptop issues within one business day, or sales might commit to following up on marketing leads within 24 hours.
Examples of SLA in emails and messages
Vendor contract: “The SLA guarantees 99.9% monthly uptime. If uptime falls below that, the customer receives a 10% service credit.”
Support team Slack: “Two high-priority tickets are close to breaching SLA. Can someone pick them up?”
Manager email: “Our internal SLA for invoice approvals is three business days.”
Customer email: “Per our SLA, we expected a response within four hours. Can you share an update?”
What 99.9% uptime actually means
Uptime percentages sound similar but allow very different amounts of downtime. Over a 30-day month:
| Uptime target | Allowed downtime per 30-day month |
|---|---|
| 99% | About 7 hours 12 minutes |
| 99.9% | About 43 minutes |
| 99.99% | About 4 minutes 19 seconds |
SLA vs SLO vs KPI
| Term | What it is | Example |
|---|---|---|
| SLA | The agreement, often with consequences | “99.9% uptime or a service credit” |
| SLO | Service level objective: the internal target | “Aim for 99.95% uptime” |
| KPI | Any key metric tracked to measure performance | “Average ticket resolution time” |
Teams often set SLOs stricter than the SLA so they have a buffer. Read more about KPIs.
How to use SLAs correctly
- Make every target measurable. “Fast response” isn’t an SLA. “First response within 4 business hours” is.
- Define business hours and time zones. “24 hours” and “one business day” are very different.
- Set priority levels. A site outage and a typo shouldn’t share the same response time.
- Agree on the remedy in advance. Service credits are common, and the contract should say how they are claimed.
- Track and report regularly. Monthly SLA reports build trust and catch problems early.
- Review the SLA when needs change. Targets that made sense at launch may not fit later.
Related terms
Browse more short forms in our Workplace Acronyms hub.
FAQ
What does SLA stand for?
SLA stands for service level agreement, a written commitment about the level of service a provider will deliver and what happens if it falls short.
What is an example of an SLA?
A common example is a software provider promising 99.9% monthly uptime and a service credit if uptime drops below that level.
What does breaching an SLA mean?
Breaching an SLA means missing one of its targets, such as responding to a ticket too slowly. It can trigger penalties or service credits.
Is an SLA legally binding?
An SLA that is part of a signed contract is usually binding. Internal SLAs between teams are typically guidelines rather than legal contracts.
What is the difference between an SLA and an SLO?
An SLA is the agreement with a customer, often with consequences. An SLO is the internal target a team aims for, usually stricter than the SLA.
