Internet failover is the automatic switch from your primary internet connection to a backup connection — typically wireless LTE or 5G — the moment the primary link fails. For businesses that run point-of-sale, VoIP, payment processing, or cloud applications, internet failover is the difference between a seamless outage response and an estimated $5,600 per minute in downtime costs . For a deeper look at the terminology, see What Is Failover: The Complete Guide — including failover vs. failback, failover vs. disaster recovery, and failover and redundancy. This guide focuses on how business internet failover works and what to evaluate before you buy.