Strategy·5 min read·April 7, 2025

What Is a Business Internet SLA — And Why Every Contract Should Have One

An SLA is your carrier's legal commitment to service quality. Most businesses sign contracts with weak SLAs and then have no recourse when service is bad. Here's what to demand.

What Is a Service Level Agreement (SLA)?

An SLA — Service Level Agreement — is the contractual commitment your internet service provider makes about the quality and reliability of your connection. It defines:

Uptime guarantee: What percentage of the time the service will be working
Mean Time to Repair (MTTR): How quickly the carrier will fix an outage
Latency guarantee: Maximum acceptable round-trip delay on the network
Packet loss limits: Maximum allowable data loss on the connection
Jitter limits: Maximum variation in packet delivery timing (critical for VoIP)
Remedy provisions: What you receive if the carrier fails to meet these commitments

Business SLA vs. Residential Service

Residential internet has no meaningful SLA. The carrier will fix it "as soon as possible," which could be tomorrow or next week. Business internet from a reputable provider should include a formal SLA with financial penalties if commitments aren't met.

This distinction is one of the most important reasons to use true business-grade service rather than a residential plan with a business billing name.

What a Strong SLA Looks Like

Metric	Weak SLA	Strong SLA
Uptime	99.5% (~44 hrs downtime/year)	99.99% (~53 min downtime/year)
MTTR	"Best efforts" or 24–48 hrs	4–8 hours guaranteed
Latency	Not specified	<10ms (local), <50ms (regional)
Packet loss	Not specified	<0.1%
Remedy	1 day credit per incident	Pro-rated credit per hour + escalating for repeat incidents

The difference between 99.5% and 99.99% uptime is the difference between 44 hours of downtime per year and 53 minutes. For a business where downtime costs $1,000/hour, that's a $43,000 difference.

SLA Remedies: What's Actually Useful

Most carriers offer SLA credits — a reduction in your monthly bill for each SLA breach. But the credit amounts vary enormously:

Weak remedy: One day's service credit for each qualifying outage. At $500/month, that's a $16 credit for a 4-hour outage that cost you $4,000 in lost productivity.

Strong remedy: Pro-rated credit calculated per hour of downtime, with escalating credits for repeat incidents, and a right to terminate the contract if SLA breaches exceed a threshold.

When negotiating, push for:

Hourly credit calculation (not daily or incident-based)
Escalating credits for repeat failures in the same month
A termination right if uptime falls below threshold over any rolling 30-day period

SLA and Response Time for Repairs

The MTTR guarantee is often more practically important than the uptime percentage. When your internet goes down:

Consumer ISP: Technician appointment in 3–5 business days
Business cable SLA: 24–48 hour response
Business fiber SLA: 4–8 hour response guaranteed
Dedicated Internet Access (DIA) SLA: 4-hour response, often with proactive monitoring that opens a ticket before you even notice the outage

For businesses where every hour of downtime costs money, the MTTR guarantee is the clause that matters most.

How to Evaluate an SLA Before Signing

1. Read the remedy section carefully. The uptime percentage is marketing. The remedy defines what actually happens when they fail.

2. Check the exclusions. Most SLAs exclude "force majeure" events, scheduled maintenance windows, and outages caused by customer equipment. Make sure these exclusions are reasonable.

3. Verify the measurement methodology. How does the carrier measure uptime? If they use self-reported monitoring, that's less reliable than third-party or customer-initiated ticket measurement.

4. Ask for incident history. For mission-critical connectivity, request the carrier's historical uptime data for your building or area.

The Right Level of SLA for Your Business

Not every business needs a 4-hour MTTR guarantee. A small office can tolerate slower response times. A hospital, financial institution, or e-commerce operation cannot.

Match your SLA requirements to your actual downtime cost. Calculate what one hour of internet outage costs your business in lost revenue, staff productivity, and customer impact — then negotiate SLA remedies that are proportionate to that cost.

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