Starlink or cellular as the backup line for an office

Starlink backup plan

Local Priority 50 GB, $55/mo

Kit

$349 (Standard)

Standby Mode

Up to 500 Kbps: messages, not calls

Key part

Dual-WAN router with automatic failover

Starlink vs cellular as the standby

A good backup shares nothing with the main line. A fiber cut, a pole down in a storm or a cable company outage won’t touch a satellite link. Cellular is also separate from your wires, but towers can lose power in the same storm, and signal inside a metal building can be poor.

Cellular plan prices aren’t on this page because we haven’t checked them yet. The Failover Builder carries dated prices as they’re checked. For a full cost comparison across all Starlink plans, a dedicated cost guide is a better fit than this page.

The Starlink backup plan: Local Priority 50 GB

Starlink markets Local Priority 50 GB as “best for back up connectivity and small businesses” (checked Oct 5, 2026). It costs $55/mo a month in the US. It’s a Priority plan, so it gets network precedence over Residential data, can carry a public IP, and has no contract (checked Oct 5, 2026).

50 GB is plenty for an office that only uses it a few days a year. A long outage changes the math. When the priority data runs out, Starlink’s terms say: After the Priority data block runs out (and no top-up), speeds drop to e.g. up to 1 Mbps down / 0.5 Mbps up. That won’t carry a call. Keep the account ready to add a 50 GB block ($25) during a long outage, and tell staff to hold big uploads until the main line is back.

What Standby Mode is (and isn’t)

Standby Mode is a pause option that keeps the dish online at very low speed. Starlink’s spec says it offers 500 Kbps download and upload, where available (checked Oct 5, 2026). A secondary source reports the price as $10/mo; Starlink’s own pages we checked didn’t state it, so treat that price as reported, not confirmed.

That speed is fine for text messages, email and a card terminal’s small transactions. It isn’t enough for a video call, a VoIP phone line for a whole office, or cloud files. If the backup must carry calls, Standby Mode isn’t the backup. Check with Starlink whether it’s available on your plan type before relying on it.

Automatic failover: the part people skip

A second line sitting in a closet isn’t a backup. Someone has to notice the outage, find the cable and swap it, and that’s the part that fails at 8am on a Monday. A dual-WAN router does it for you:

1. Plug the main line (fiber or cable modem) into WAN 1 and the backup (Starlink in bypass mode, or the cellular router) into WAN 2.
2. Set the router to failover, not load balancing, so the backup only carries traffic when it’s needed. That keeps priority data for real outages.
3. Set the health check to ping a public address, not the modem. A modem can be up while the line behind it is dead.
4. Put the modem, the backup device and the router on a UPS. Battery sizing is outside this page.
5. Test it once a quarter: unplug WAN 1 during a quiet hour and make a call.

Which should you pick?

• Strong signal from at least one carrier inside the office, outages are short: cellular router. Smaller, cheaper to keep idle.
• Weak or no cell signal, or outages last days after storms: Starlink Local Priority 50 GB.
• Phones and card terminals must never stop: both, behind a router that supports more than two WANs, or a second wired provider on a different route.
• A second wired provider is available (fiber plus cable from different companies): that can work well, if the two don’t share the same poles or trench. Ask each provider.

Not sure? The Failover Builder asks five questions and gives a parts list. If outages already happen, the “nothing switches over” fix walks through the common mistakes.