How much does internet redundancy cost?

A second broadband circuit ($80–300/mo) plus failover management ($150–350/mo via services like Bigleaf) typically covers small offices — roughly $250–650/mo all-in for an outage-proofed office. Compare that to one day of dead phones and offline staff.

Is a backup LTE connection enough?

For basic email and card processing, yes. For VoIP and video at staffed desks, LTE works as a bridge but per-device data plans get expensive fast — most offices pair fixed-wire primary + secondary circuits with LTE as a third layer.

Business Internet Redundancy

Written by Ivan Elias, Founder & Principal Advisor · Published September 15, 2026

No fee · no obligation

“But the internet never goes down” — until it does, for four hours, on your biggest day of the month. Redundant connectivity is cheap insurance; here’s the design that actually works, in tiers.

Tier 1: two circuits, two networks (the non-negotiable)

Redundancy means physically diverse paths: fiber + cable, or fiber + fixed wireless. Two circuits from the same provider (or the same conduit in the street) fail together — the truck backing into the neighborhood pedestal doesn’t care that you pay twice.

Primary: symmetrical fiber (see best fiber providers)
Secondary: cable broadband or fixed wireless on a different network
Cost: $80–500/mo depending on the secondary’s speed tier

Tier 2: automatic failover (pick your flavor)

Two circuits are useless if switching requires unplugging things. Options:

Bonding/failover appliance or cloud service (Bigleaf) — plug both circuits in; it steers VoIP traffic, fails over in seconds, preserves static IPs. Zero network expertise required. Our default for SMB.
SD-WAN edge — same failover plus application routing policies across sites; the right answer for multi-location (see best SD-WAN).
Firewall-based failover — most business firewalls do basic dual-WAN; adequate for best-effort failover, weaker for call-quality-aware steering.

Tier 3: LTE/5G backup (the flood insurance)

A managed LTE router or an LTE module in your edge device covers the case both wireline circuits share upstream (yes, it happens — neighborhood fiber cuts take out cable too). Metered data makes it impractical as a primary, perfect as a third layer.

What redundancy costs vs what outages cost

A properly redundant small office: roughly $250–650/month all-in. A single outage day for a 25-person office: 25 staff idle plus dead phones plus missed revenue — almost always five figures. The math isn’t close.

The failure people forget: power

Your redundant circuits die with the building’s power. Any office where phones matter needs: UPS on the network rack (80–120 min) and either generator or LTE-powered phone fallback for staff. Write it into the next budget cycle.

Implementation checklist

Order the secondary circuit on a different physical network (30–60 days lead).
Choose failover: Bigleaf (SMB simplicity) or SD-WAN (multi-site).
Test failover monthly — pull the primary plug on purpose. An untested failover is a hope, not a system.
Point your monitoring at both circuits (device offline ≠ internet offline).

Want quotes on redundant circuit pairs from different networks? That’s a free advisor request — we design these weekly.