#business phone system upgrade

Outdated Phone System Costs You Customers in 2026

Outdated phone system costs go far beyond repair bills, missed calls, dropped connections, and legacy line fees silently drain $50,000–$130,000 per year from a typical 10-person SMB. With AT&T ending copper PSTN support across 20+ states, 2026 is the year inaction becomes a liability. Use the revenue-leak formula inside to calculate your exact number.