What does a business phone system cost in Chicago? - VoIP Services for Businesses in Chicago, IL

A business phone system in Chicago usually runs about $20 to $35 per user per month for a cloud (VoIP) setup, plus one-time setup and hardware. The range depends on how many people and locations you have and which features you turn on. In Chicago, it also depends on something most quotes never mention: the taxes and fees that get stacked on top of the price you were shown.

I’m Robert Harney. I’ve built and run phone systems for Chicago businesses since I started Open One Solutions in 2009, and I still answer the phone here myself. So here’s the honest version — including the breakdown most quotes skip.

Get a straight numberWant a straight number for your business? Talk to a real engineer — no call center, no runaround.

What’s included in the price?

Most cloud phone plans bundle the calling service, a set of features, and support into one per-user monthly fee. The standard features cover voicemail, an auto-attendant, call routing, and mobile and desktop apps so your team can work from anywhere.

What changes your price is everything around that: AI call answering, call recording, analytics, how many desk phones you actually need, and whether professional installation, training, and ongoing support are part of the deal or an afterthought.

How much does a cloud phone system cost per user?

For most Chicago businesses, cloud phone service runs roughly $20 to $35 per user per month for a full-featured plan. Bare-bones plans can dip toward $15. Feature-heavy setups, or very small user counts, run higher.

But the bigger cost swing isn’t the plan. It’s paying for seats and features you don’t use. The right setup is sized to what you actually need, not to the tier that looked best on a comparison chart.

What are the upfront costs versus the monthly costs?

Two buckets, and a good provider keeps them separate so you can see exactly which is which.

Upfront: setup and porting your existing numbers — often minimal, and frequently waived or a small one-time fee — plus desk phones, if you want physical phones at all. Many businesses run entirely on the mobile and desktop apps.
Monthly: the per-user service, plus any add-ons you turn on.

Then there’s the question that moves more money than any other line on the quote.

Should you buy the phones or rent them?

Renting looks easier. It’s a smaller number today and it disappears into the monthly bill. Buying costs you a few thousand dollars upfront and then stops costing you anything.

Over the life of the device, that difference is not small. We have saved clients thousands of dollars — often a multiple of what the phones cost — by purchasing at the start instead of renting for years. Yes, it’s a bigger check on day one. It’s a much smaller number by year five.

Which brings up the other thing worth knowing: there is no such thing as a free phone. If a provider is handing you hardware at no charge, the cost is baked into the seat, and you will pay for that phone several times over the length of the agreement.

Here’s how to see it. Ask what the seat costs with the phone included, and what it costs if you bring your own. If there’s a difference, multiply it by the length of the term — that’s what the free phone actually costs you, and it’s usually well above what the same phone costs to buy. If there’s no difference at all, that tells you something too: you’re paying for hardware whether you take it or not.

Why is your Chicago phone bill higher than the sticker price?

Here’s the part nobody warns you about.

Illinois charges an 8.65% state telecommunications excise tax. The City of Chicago adds a 7% city telecommunications tax on top of that. Call it roughly 15.65% combined, before federal Universal Service and 911 fees enter the picture. That’s among the highest telecom tax burdens in the country, and it applies no matter who you buy from. A plan advertised at $30 per user is really closer to $35 once Illinois and Chicago take their cut.

What changes by provider is what gets added next to it.

I regularly look at bills where taxes and fees run 35% to well over 60% of the base rate. Some of that is government. A lot of it isn’t. Regulatory recovery fees, administrative fees, cost recovery fees — those aren’t taxes. They’re line items the carrier chose to add, and for many providers they’re a straightforward profit center. That’s how a $30 quote becomes a $48 bill.

We typically land at 20% to 25% all in, depending on your zip code. Not because we found a loophole — because we pass the taxes through and stop there.

Two questions to ask any provider before you sign

What is the all-in monthly number, taxes and fees included? Not the base rate. The number on the invoice.
Which of those charges are government pass-through, and which are yours? A provider who can answer that quickly is telling you something good about how they bill.

Does a copper (POTS) line cost more than cloud VoIP?

More and more, yes. Carriers are retiring copper lines, and prices on what’s left have climbed sharply — often past what a cloud line costs, for less capability. If you’re still paying for copper POTS lines, that’s usually the first place we find you money.

The lines that need real care are the ones that aren’t really phones: elevator lines, fire panels, alarm circuits, and fax. Those carry code requirements, and they need a replacement designed for them rather than a general-purpose plan.

What about installation, training, and what happens on day two?

The cheapest quote usually assumes you’ll handle the hard part yourself.

A phone system gets installed once and then used every single day for years. We do professional on-site installation. We train your team in person on the system they’re actually going to use, not on a help article. And we’re there on day two — and day two hundred — when someone needs a call flow changed, a new hire added, or a problem solved during business hours.

That last part is where phone systems quietly go wrong. The system gets installed, the people who knew how it worked move on, nobody wants to sit in a support queue, and three years later you’re paying for features nobody uses and working around problems nobody ever reported. Ongoing support isn’t a warranty. It’s the difference between owning a phone system and being stuck with one.

What should a Chicago business budget?

A rough planning guide, before taxes and fees:

Size of business	Typical monthly range	Also plan for
5 – 10 people	$150 – $350	One-time setup; phones if you want them
25 – 50 people	$600 – $1,500	Call recording, analytics, AI answering
Multi-location	Depends on sites and seats	One system across every office, one bill

Then add Illinois and Chicago telecom taxes on top, and decide whether you’re buying or renting hardware. Want the real number for your setup? That’s a ten-minute call.

What makes Open One different on price?

Four things.

You talk to real engineers here in Chicago — not a call center reading from a script.
We build AI answering and routing into your system when it actually helps — and we’ll tell you plainly when it doesn’t yet.
We install it professionally, train your people, and stay — on-site setup, in-person training, and real support after go-live.
We give you the honest, tax-included number before you sign, not after.

We’ve done it this way since 2009 because it’s how I’d want to be treated.

Ready when you areReady for a straight answer? Get a real quote — from a real engineer.

Frequently asked questions

Pricing & costs

How much does a business phone system cost per month?

For most Chicago businesses, expect about $20 to $35 per user per month for cloud service, plus Illinois and Chicago telecom taxes (roughly 15.65% combined) and any add-ons. Your exact number depends on users, features, and locations. We give you an all-in figure — taxes included — so there are no surprises on the first bill.

Is VoIP cheaper than a traditional phone system?

Usually, yes. Cloud VoIP avoids the hardware and maintenance of an on-site system, and it’s typically cheaper than aging copper lines, which keep climbing in price. You also get more — mobile apps, routing, AI answering — for less than a traditional setup costs to keep running.

What does it cost for multiple locations?

Multi-location pricing is normally based on total seats and how your sites connect, not a penalty per building. One cloud system can run every location under one plan and one bill — usually simpler and cheaper than separate systems per office.

What hidden fees should I watch for?

Start with telecom tax: Illinois adds an 8.65% state excise and Chicago adds a 7% city tax — roughly 15.65% combined — before federal Universal Service and 911 fees. Then watch the carrier’s own charges. We regularly see bills where taxes and fees together run 35% to over 60% of the base rate, because regulatory-recovery and administrative fees are a profit center for many providers. We typically run 20% to 25% all in, depending on your zip code. Always ask for the all-in, tax-included number.

Hardware & phones

Are there setup or installation fees?

Often minimal. Setup and number porting are frequently waived or a small one-time fee, plus desk phones if you want them ($50 to $250 each to purchase). A good provider shows these separately from your monthly cost, so you know what’s one-time and what’s ongoing — instead of burying setup inside a multi-year contract.

Do I need to buy new phones or hardware?

Not always. Many businesses run entirely on the mobile and desktop apps, or keep compatible phones they already own. If you want desk phones, they typically run $50 to $250 each to purchase. We’ll tell you honestly whether new hardware helps you or just adds cost.

Should I buy or rent my desk phones?

Buying almost always costs less over the life of the device. Renting is a smaller number today, but it never stops. We’ve saved clients thousands of dollars — often a multiple of the purchase price — by buying upfront instead of renting for years. And be careful with “free” phones: that cost is baked into the seat, so you pay for the phone several times over the term.

Installation, support & features

Is installation and training included?

With us, yes — professional on-site installation, in-person training for your team, and real support after go-live. It’s worth asking any provider directly, because the cheapest quote often assumes you’ll install and learn the system yourself. Day-two support is where a phone system is either an asset or a headache.

What does adding an AI voice agent cost?

It’s an add-on to your plan, and pricing varies by provider and by how much you use it. An AI voice agent answers, routes, and books calls automatically — useful after hours and for busy front desks. Ask for it as a separate line item so you can see exactly what it adds, and we’ll tell you plainly whether it pays for itself yet.

Does local support cost more than a national carrier?

No — and it saves you money when something breaks. With Open One you reach a real engineer in Chicago, not a ticket queue. Faster fixes mean less downtime, and downtime is the most expensive line item on any phone system, even though it never shows up on the quote.

Contracts & switching

Is it a contract, or month-to-month?

Both are common in the market. Many providers now offer month-to-month, and some discount an annual commitment. Ask directly about term length and cancellation before you sign, and get it in writing. You should get a straight answer, not fine print you discover later.

Can I keep my existing phone numbers?

Yes. We port your existing numbers so you keep them, and your customers never know anything changed. Porting is a standard part of setup — usually free or a small one-time fee — and we manage the cutover so your phones don’t go down during the switch.

The bottom line

The honest answer to “what does a business phone system cost in Chicago” is about $20 to $35 per user per month for cloud service — likely less than you’re paying for copper today — plus the Illinois and Chicago telecom taxes a good provider will show you up front.

Two things decide the rest. First, get an all-in quote including total taxes and fees; those can range from 35% to over 60% with many carriers, because fees are a profit center. We typically run 20% to 25%. Second, decide whether you’re buying or renting your phones, and remember that a free phone isn’t free — it’s baked into the seat.

Give us ten minutes and we’ll give you a real number for your business, taxes and all.

Let’s talk

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Get a straight number for your business.