The Short Answer
A business phone system costs $25/user/month for cloud-hosted or $3,499 + $699/year for an on-premises system supporting up to 20 users — both with professional installation included. SIP trunks to replace your existing phone lines run approximately $200/month for a typical small business. Most small businesses that have been on landlines see their total monthly communication cost go down after switching.
Most business owners searching for phone system pricing run into the same problem: everyone gives ranges. “$15 to $50 per user per month.” “$3,000 to $10,000 for on-premises.” Those ranges aren’t wrong, but they’re not useful if you’re trying to make a real decision about a real budget.
This guide gives you specific numbers — Phonewire’s actual pricing — alongside an honest explanation of the factors that move costs up or down, and the line items that are easy to overlook until you get the invoice. If you’re a small or mid-sized business evaluating your options, you should leave this page with a clear picture of what a new phone system will actually cost you.
The Three OptionsCloud-Hosted, On-Premises, or Hybrid? Here’s What Each Costs
Every business phone system falls into one of three categories. The right choice depends on your size, your internet reliability, whether you have staff working remotely, and how you prefer to handle IT. Here’s what each looks like in practice.
Cloud-Hosted VoIP
Most PopularYour phone system lives in the cloud. Calls route over your internet connection. Staff use desk phones at the office and the Linkus UC app on any smartphone, laptop, or Mac when remote.
- No server to buy or maintain on-site
- Works across any number of locations
- Same number rings desk phone and mobile app
- Voicemail to email, auto-attendant, call recording included
- Professional installation + same-day training included
On-Premises Hybrid
Best for ControlA physical appliance installs at your location. Call processing runs locally — your phones keep working even if your internet goes down. Optional cellular failover add-on for full redundancy.
- Hardware at your location — you own it
- Flat annual license, no per-seat surprises
- Same Linkus UC mobile + desktop app
- Optional cellular failover add-on
- Professional installation + same-day training included
Phone System Cost Comparison: Cloud vs. On-Premises vs. What You’re Probably Paying Now
| Cost Item | Legacy POTS / Old PBX | Phonewire Cloud-Hosted | Phonewire Hybrid |
|---|---|---|---|
| Hardware (upfront) | Already paid (sunk cost) | $0 | $3,499 (one-time) |
| Monthly license / service | Varies by PBX vendor | $25/user/month | $699/year (~$58/month flat) |
| Phone lines (20 users) | $400–$800/month (POTS) | ~$200/month (SIP trunks) | ~$200/month (SIP trunks) |
| Installation | Already paid | Included | Included |
| Staff training | Usually extra | Included (same day) | Included (same day) |
| Day-to-day changes | Service call / per-incident | Included, no charge | Included, no charge |
| Mobile app (iOS/Android) | Usually not available | Included | Included |
| Voicemail to email | Often extra / unavailable | Included | Included |
| Estimated monthly total (20 users) | $600–$1,200+ | ~$700/month | ~$260/month (after payback) |
The pattern most businesses see: switching from legacy landlines to Phonewire cloud-hosted keeps monthly costs roughly flat or slightly lower, while gaining features (mobile app, voicemail to email, auto-attendant, call recording) that the old system either didn’t have or charged extra for. The on-premises solution has a higher year-one cost due to hardware, but a significantly lower ongoing monthly cost — typically the better long-term value for businesses that plan to stay in place.
What You GetWhat’s Included — No Separate Feature Licenses
One of the most common frustrations with enterprise phone system vendors is that features you’d consider basic — voicemail, auto-attendant, call recording, the mobile app — are sold as separate add-ons. Phonewire doesn’t do that. Every system includes:
- Auto-attendant (unlimited menus and greetings)
- Voicemail with email delivery (audio file to your inbox)
- Call recording
- Call groups, ring groups, and call queues
- Linkus UC client (iOS, Android, Mac, Windows)
- Music on hold with custom audio
- Microsoft 365 integration
- Conference calling
- BLF (busy lamp field) on desk phones
- After-hours and holiday routing
Optional add-ons with separate pricing: human-powered voicemail transcription (converts audio to readable text), business SMS texting (send/receive texts from your office number), and cellular failover for the on-premises system.
What to Watch ForThe Costs That Catch People Off Guard
Phone system pricing is an area where the advertised number and the actual number can diverge significantly — particularly when buying from a large national vendor or telecom carrier. Here are the line items worth asking about before you sign anything.
Per-feature licensing
Many providers charge separately for voicemail seats, auto-attendant instances, call recording storage, and mobile app access. Ask specifically whether each of these is included or an add-on — and at what per-seat price.
Installation and programming
Some providers quote the hardware and monthly service separately from installation — and installation can be $500 to $2,000+ depending on site complexity. At Phonewire, professional on-site installation and same-day staff training are included in every system quote. No separate line item.
Number porting fees
Moving your existing phone numbers to a new system (porting) can carry fees from some carriers — particularly for toll-free numbers or numbers on legacy copper lines. Phonewire handles the porting process at no additional charge for standard business numbers.
Ongoing change fees
Some providers charge per-incident for routine changes: adding a new employee, adjusting call routing, updating an auto-attendant greeting. These service calls add up fast over years. Phonewire includes day-to-day changes at no additional charge for the life of the system.
Desk phone costs
IP desk phones run $80–$250 per unit depending on model (basic display phone vs. color touchscreen executive phone). These are typically purchased once and last 7–10 years. The number you need depends on how many staff members require a physical phone vs. using the mobile/desktop app only.
Internet capacity
VoIP calls require approximately 100 Kbps of dedicated bandwidth per simultaneous call. Most business internet connections handle this easily. If your current connection is undersized or unreliable, budget for an upgrade — typically $50–$150/month for a business-grade fiber connection. Phonewire assesses your network before installation to flag any issues upfront.
What Moves the Number Up or Down
Within either deployment type, a few variables have the biggest effect on your total cost:
Number of users. Cloud-hosted pricing scales linearly with users at $25/user/month. The on-premises Hybrid licenses up to 20 users at a flat $699/year — making it increasingly cost-effective as you approach that ceiling. For businesses over 20 users, contact Phonewire for a custom quote on expanded licensing.
Number of physical locations. Multi-site businesses can run all locations on a single Phonewire system with a unified dial plan — one auto-attendant, one directory, one support relationship. The cloud-hosted model handles this most cleanly since there’s no on-site hardware at each location. Each additional location requires its own internet connection and desk phones, but no additional system licenses for most configurations.
Desk phones vs. app-only users. Staff who only need the mobile or desktop app don’t require a physical desk phone. Businesses where most employees work remotely or primarily on laptops can significantly reduce hardware cost by deploying softphones for the majority of users and physical phones only for reception and conference rooms.
Optional add-ons. Voicemail transcription and business SMS texting carry separate monthly fees. Support subscription plans are available to eliminate per-incident billing for any support work beyond routine changes.
Reality CheckWhat Your Current Phone System Is Actually Costing You
The most useful cost comparison isn’t cloud vs. on-premises — it’s your new system vs. what you’re currently spending. Most businesses that have been on legacy landlines or an aging PBX are surprised by their current bill when they total it properly:
The businesses most likely to see an immediate monthly savings are those still paying for multiple analog POTS lines. Replacing 8–10 POTS lines at $40–$80 each with SIP trunks at approximately $200/month for equivalent capacity is often the single largest cost reduction in the switch.
Get a Specific Number for Your Business
Tell us how many users you have, whether you prefer cloud or on-premises, and how many locations — and Phonewire will give you an exact all-in price the same day. No ranges. No “it depends.” Just a real number.
Schedule a Free Consultation See how our systems work →