Dedicated internet access (DIA), explained

For businesses that can't afford to slow down, dedicated internet promises guaranteed speed and uptime. Here's what DIA actually is — and whether you need it.

What is dedicated internet?

With most business plans, your bandwidth is shared with other customers on the same node, so real-world speeds dip when the neighborhood gets busy. Dedicated internet access (DIA) gives you a private circuit: the full advertised speed is yours around the clock, symmetrical in both directions, and backed by a service-level agreement that guarantees uptime and repair times.

The key word is dedicated. On a shared plan, "up to 500 Mbps" is a ceiling you might hit at 3 a.m. and miss at 3 p.m. On a 500 Mbps DIA circuit, you get 500 Mbps up and down, all the time, because no one else is on the line. For a business, that predictability — not the raw number — is what you're paying for.

DIA vs. shared business internet

Shared business internet (cable or shared fiber) is cheaper and plenty for most small businesses — email, card processing, a few devices, some cloud apps. Dedicated internet trades that lower price for certainty: guaranteed throughput, symmetrical uploads for large transfers and cloud backups, and SLA credits if the provider misses its uptime target. The gap shows up most during peak hours, when a shared line slows and a dedicated one doesn't, and during outages, when a shared plan offers "best effort" repair and a DIA circuit commits to a hard deadline.

What an SLA actually guarantees

The SLA is the real product. A serious dedicated-internet SLA puts numbers, and money, behind the promise:

• →Uptime — typically 99.9% to 99.99%, with service credits if the provider falls short.
• →Guaranteed throughput — your committed rate, symmetrical, not "up to."
• →Mean time to repair — a contractual deadline to restore service, often four hours, versus the open-ended window on consumer plans.
• →Priority support — a dedicated business line, not the general consumer queue.

Cost and installation

Dedicated internet costs meaningfully more than a shared plan — often several hundred to a few thousand dollars a month depending on the committed speed and your location — and it usually comes on a one-to-three-year term. Installation can take weeks, because the provider may need to build fiber to your building, so plan the lead time into any move or launch. Because the circuit is provisioned specifically for you, pricing is quoted rather than listed; get competing quotes, and confirm the SLA terms and the install timeline in writing before you sign.

Does your business need it?

If downtime directly costs you money — a call center, a clinic running telehealth, a studio pushing large files, a site hosting its own servers — DIA's guarantees pay for themselves the first time they prevent a costly outage. If you're a storefront or small office whose worst case is a slow afternoon, a good shared business fiber plan with a solid SLA is usually the smarter spend. A middle path many businesses take: run affordable shared fiber as the primary line and add an automatic failover connection for resilience, rather than paying for a full dedicated circuit you don't quite need.

Weighing whether you also need a static IP or a stricter SLA? Read our static IP & SLA guide.

Who sells dedicated internet, and what each guarantees (Oct 2026)

An SLA without a dedicated line

Two providers attach an SLA to plans that aren't DIA. gFiber Business 2 Gig ($250/mo) includes a 99.9% SLA and a static IP on shared fiber. Starlink Business Local Priority plans, from $55/mo for 50 GB, include an SLA and a public IP. For many small offices, one of these plus a backup line costs far less than a dedicated circuit.

What uptime percentages mean in hours

Questions to ask before you sign

• Repair time. What is the guaranteed time to restore service, and is it 24/7 or business hours only?
• Credits. How is the credit calculated (usually a share of the monthly fee), is it capped, and do you have to claim it?
• What counts as an outage. Planned maintenance and problems on your side are usually excluded.
• Construction. If fiber has to be built to your building, who pays, and how long will it take?
• Term and early exit. Most DIA is sold on 1- to 5-year terms. What does leaving early cost?
• IPs and extras. How many static IPs are included, and are DDoS protection or a managed router extra?
• Diversity. Can the provider bring a second path into the building, or should your backup come from a different network?

Questions