- Apr 22, 2026
- 7 min read
How Much Does a VoIP Phone System Really Cost for a Small Business?
VoIP providers are notorious for leading with a low per-user price that looks great until you read the fine print. Taxes and fees. Add-on charges for features that should be standard. Annual commitment requirements hidden in the pricing tiers. Here is a complete, honest breakdown of what a VoIP phone system actually costs for a small business — so you know what to expect before you sign up for anything.
Most VoIP providers advertise a per-user monthly price that assumes annual billing. The monthly rate for a month-to-month plan is typically 20 to 30 percent higher. So a plan advertised at $15 per user per month might actually cost $19 per user per month if you do not commit to a year upfront. Then add taxes and regulatory fees — typically 15 to 25 percent on top of the base rate — E911 service fees, number porting fees if you are bringing your own number, and overage charges if your plan has minute limits.
If you want physical desk phones, you will need to budget for IP phones. Business-grade Grandstream desk phones run $50 to $150 per phone depending on the model. Some providers lease phones for an additional monthly fee. Others require you to buy their proprietary hardware. If you use softphones — apps on your computer or mobile device — hardware cost is zero.
What is typically included at the base price is a local phone number, basic calling for inbound and outbound, voicemail, and a mobile app. What usually costs extra is an auto-attendant or IVR, call recording, AI receptionist, eFax, additional numbers, international calling, and advanced analytics. Read the fine print before you assume a feature is included.
For a solo operator with 1 to 2 users, expect to pay $20 to $40 per month for the VoIP plan, $80 to $120 one-time for an optional IP phone, and $15 to $35 per month if you add an AI receptionist. Total monthly cost runs $35 to $75. For a small team of 5 users, the VoIP plan runs $100 to $150 per month, IP phones cost $400 to $600 one-time, an AI receptionist is $35 per month, and eFax is $34 per month. Total monthly cost runs $169 to $219.
DiaVoice pricing is transparent with no hidden fees. DiaPBX is $20 per user per month and includes extensions, IVR, call recording, voicemail-to-email, and DiaVoice Go mobile app. DiaVoice AI starts at $15 per month for a full AI receptionist with 24/7 call handling. DiaFax is $34 per month for HIPAA-compliant eFax. DiaCRM is $39 per month per account for an auto-logging CRM built into your phone dashboard. No contracts. No setup fees. Number porting included at no charge.
Get a straight answer on pricing for your specific setup. Call (256) 724-3100 or visit diavoice.net — no pressure, no sales tactics.
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