VoIP ROI for Small Business: How to Calculate Your Savings Before You Switch

Most small businesses are overpaying for phone service. If you are still running a legacy PBX or traditional landlines, you are likely spending 2–3x what a modern VoIP system would cost. Here is how to calculate your actual savings before making the switch.

## Current Costs to Baseline

Before calculating ROI, document your current monthly phone spend:

Sample baseline (20-person office): - 8 analog lines: $480/month - Long distance: $150/month - PBX maintenance: $300/month - Conference bridge: $75/month - Total: $1,005/month ($12,060/year)

## VoIP Costs (What You Would Pay Instead)

Cloud VoIP system (UCaaS) for 20 users: - 20 user licenses at $25–$35/month: $500–$700/month - SIP trunks (10 concurrent calls): $100–$150/month - Toll-free number: $10/month included - Conference calling: included - Total: $610–$860/month ($7,320–$10,320/year)

## The Core Savings

Monthly savings: $145–$395/month Annual savings: $1,740–$4,740

This is just the direct line replacement savings. The actual ROI is higher.

## Hidden Savings Most People Miss

### 1. Hardware Maintenance Elimination Your legacy PBX is aging hardware that requires: - Manufacturer support contracts: $200–$1,000/month - Emergency repair calls: $2,000–$5,000 per incident - End-of-life replacement in 3–5 years: $15,000–$50,000

With cloud VoIP, there is no PBX hardware to maintain. The provider handles all infrastructure.

Annual savings: $2,400–$12,000

### 2. Mobile Workers / Remote Employees Traditional phone systems charge for each physical extension. VoIP users can make and receive calls on their laptop, desk phone, or mobile app — all under one user license.

If you have 5 remote employees who currently need separate mobile lines or home office lines: - Current cost: 5 × $80/month mobile + $50/month for business phone = $650/month - VoIP: 5 users already included in your license count - **Annual savings: $7,800**

### 3. Multi-Location Unified Communications Do you have multiple offices or remote workers? Transferring calls between locations on traditional systems often costs per-call or requires separate PBX systems.

With VoIP, all locations share one system. Inter-office calls are free. Customers call one number and can be routed to anyone, anywhere.

Annual savings for 3-location businesses: $3,000–$8,000

### 4. Reduced Long-Distance Charges VoIP calls travel over your internet connection, not the telephone network. Most plans include unlimited domestic long distance at no additional charge.

If you currently spend $300/month on long distance: **Annual savings: $3,600**

## Total ROI Calculation

Sample ROI calculation (20-person company with remote workers):

| Savings Source | Annual Amount | |---------------|--------------| | Line replacement | $3,000 | | PBX maintenance eliminated | $3,600 | | Remote worker unification | $4,800 | | Long distance elimination | $3,600 | | **Total annual savings** | **$15,000** |

3-year ROI: 650%–1,600%

## Additional Business Value

ROI calculations above only count direct costs. VoIP also delivers:

• **Business continuity:** Calls automatically route to mobile phones if your internet fails
• **Scalability:** Add users instantly without new hardware or wiring
• **Better customer experience:** Auto-attendants, smart routing, call recording, and analytics
• **Compliance features:** Call recording for regulated industries is included or inexpensive
• **Advanced features free:** Voicemail-to-email, video conferencing, team messaging — no add-on fees

## When VoIP Might Not Be Right Yet

VoIP requires reliable internet: - **Minimum bandwidth:** 100 kbps per concurrent call - **Jitter and latency:** Must be below 30ms and 150ms respectively - **Packet loss:** Must be below 1%

If your internet connection is unreliable or inadequate, you will need to upgrade it before benefiting from VoIP. A site survey before commitment will identify any network requirements.

Summit DNC provides free VoIP readiness assessments that analyze your network, calculate your exact ROI based on current bills, and recommend the right system for your size and budget.