Reading Uptime SLAs: What Your Hosting Contract Actually Promises

March 23, 2026 — Clint

Understanding Uptime SLAs: What the Numbers Actually Mean

If you’ve shopped for web hosting, you’ve seen the promises: “99.9% uptime,” “99.99% guaranteed,” “enterprise-class reliability.” These percentages come from documents called Service Level Agreements (SLAs). They’re also among the most misunderstood commitments in the hosting industry.

When you’re running a medical practice, law firm, or accounting business in Idaho, Wyoming, or Utah, downtime costs real money. A crashed email server during tax season isn’t just an inconvenience—it’s a business emergency. That’s why understanding what your SLA actually guarantees matters more than the percentage itself.

The Math Behind Uptime Percentages

Let’s translate those percentages into actual downtime. Most SLAs are calculated on a monthly basis:

99% uptime = 7.2 hours of allowable downtime per month
99.9% uptime = 43 minutes of allowable downtime per month
99.95% uptime = 22 minutes of allowable downtime per month
99.99% uptime = 4.3 minutes of allowable downtime per month
99.999% uptime = 26 seconds of allowable downtime per month

On paper, the difference between 99.9% and 99.99% looks small. In reality, it’s the difference between 43 minutes and 4 minutes. For a medical office managing patient records, that distinction matters significantly.

What Your SLA Actually Covers (and What It Doesn’t)

Here’s where most people get caught off guard: SLAs are narrowly defined documents. They specify exactly which components are covered by the uptime guarantee. A typical SLA might promise 99.9% uptime for “network availability” and “server hardware,” but explicitly exclude:

Your application code and custom software
Database performance (only availability is covered)
Scheduled maintenance windows
Issues caused by DDoS attacks or malware
Problems on your end of the connection (your office network)
Third-party services integrated with your hosting

A national shared hosting provider might guarantee their infrastructure is up 99.9% of the time, but if your WordPress site crashes because of a bad plugin update, that’s not their problem under the SLA. You’re on your own.

Reading the Fine Print: Service Credits and Remedies

Every SLA includes a “remedy” section—what you actually get if the provider fails to meet the guarantee. This is often disappointing. A typical SLA might offer:

10% credit of monthly service fees if uptime falls below 99.9% but above 99%
30% credit if uptime falls below 99%
Refund capped at one month’s fees maximum

So if your business loses $15,000 in revenue because your hosting went down, and you’re paying $200/month, you might get a $60 credit. The SLA protects the provider more than it protects you.

Additionally, most SLAs require you to open a support ticket during the outage and follow specific notification procedures. If you miss the window or fail to meet their requirements, you forfeit the credit entirely.

Why Local Managed Hosting Changes the Equation

At Teton Web Hosting, we operate a three-node Proxmox HA cluster with redundant 40GbE Mellanox networking and Cisco Nexus switching. But more importantly, we stand behind our infrastructure because we actually run it. We’re not a marketing organization pointing to third-party data centers.

Our SLA commitments come with a crucial difference: direct accountability. If your server in our Idaho Falls facility goes down, we’re on it immediately. You’re not waiting for support tickets to escalate through vendor hierarchies. We manage your infrastructure proactively—monitoring, patching, and maintaining systems before problems occur.

For businesses in Utah, Wyoming, and Idaho, local infrastructure also means faster response times, easier hands-on support, and the ability to have real conversations about your infrastructure needs. No phone trees. No overseas support centers.

Questions to Ask Before Signing Any SLA

Before choosing a hosting provider, review these specifics:

What exactly is covered? Network? Hardware? Software? Database performance?
How is downtime measured? From your perspective or theirs? Who determines when an outage started and ended?
What’s the actual remedy? Not just the percentage, but what you’ll receive if they fail.
Are there exclusions? Read the fine print. Most SLAs exclude more than they cover.
Who monitors uptime? Third-party verification? Their own monitoring? External probes?
What about maintenance windows? Do scheduled updates count against uptime?

The Takeaway

Uptime percentages are marketing numbers. The real question is whether your hosting provider can actually deliver reliability and whether they’ll stand behind their promises when something fails. A 99.9% SLA from a company with responsive managed support is more valuable than a 99.99% guarantee from an impersonal provider with poor remedies.

At Teton Web Hosting, we build infrastructure designed to stay up, then back it with support that actually cares when something doesn’t. If you’re tired of generic SLAs and want hosting with accountability, let’s talk about your infrastructure. Or call us directly at (208) 557-4669.