Business phone numbers are no longer a one-size-fits-all commodity—what you'll pay depends on your provider, setup complexity, and how many features you need. Whether you're migrating to VoIP or setting up your first dedicated business line, understanding the real cost breakdown will help you avoid surprise bills and choose the right system for your budget.
What You'll Actually Pay for a Business Phone Number
A single business phone number typically costs $10–$30 per month through most VoIP providers, though some budget-friendly options start as low as $5. This is the base monthly fee for the line itself. Most providers don't charge a separate setup fee for a new number, but porting an existing number from another carrier can add $10–$50 as a one-time charge.
If you're buying multiple lines, the per-line cost often drops. A five-person team might pay $15–$20 per line instead of the standard $25, creating total monthly bills of $75–$100 for all numbers combined.
Breaking Down VoIP System Costs
The confusing part isn't usually the phone number—it's everything bundled around it. Here's what actually factors into your total spend:
Monthly line rental: $10–$30 per number (the actual phone line cost)
System or plan tier: Many VoIP providers tier pricing by features. A basic plan with call forwarding and voicemail runs $15–$25/month. Professional plans with conferencing, call recording, and advanced analytics cost $30–$50+/month.
Hardware (optional): A desk phone ranges from $50–$300 depending on features and brand. Many businesses now skip this and use software clients on computers or mobile apps instead.
Number porting: $10–$50 one-time fee to move your existing number from another provider.
International calling (if needed): Most plans include US/Canada calling. International add-ons run $5–$20/month depending on coverage.
Premium features: Call screening, custom hold music, advanced analytics, or dedicated account support can add $5–$15/month each.
How Provider Type Affects Pricing
Standalone VoIP providers (like Ring Central, Vonage, 8x8) typically run $20–$35/month per line for a feature-rich business plan. They're often the most transparent about pricing.
All-in-one business communication platforms bundle phone, video, chat, and file sharing. Expect $25–$50+/month per user. These make sense if you're replacing multiple tools.
Traditional carriers offering VoIP (like AT&T or Verizon business) often start higher—$30–$50+/month per line—but may appeal if you want consolidation with existing services.
Cheapest tier providers like Grasshopper or Ooma Office keep base line costs at $10–$15/month but charge extra for features that competitors bundle in.
Hidden Costs to Watch For
Setup fees occasionally appear even though most providers advertise "free setup." Ask directly whether your provider charges for phone system configuration or onboarding.
Contract minimums can lock you in for 1–3 years. Month-to-month options exist but sometimes cost 10–15% more.
Call overage charges apply if you use far more minutes than your plan includes—though unlimited plans are now standard for business.
911 service fees ($1–$3/month) are mandatory and sometimes buried in the fine print.
Choosing a Provider: What to Compare
Beyond price, evaluate these specifics: Does the provider offer local numbers in your area (some charge more for certain regions)? Can you scale easily—adding lines without renegotiating your contract? Is there a mobile app so your team can take calls on their phones? Does the system integrate with your existing CRM or calendar software?
Mercoly helps you compare and find trusted Business Phone & VoIP Systems providers in one place, so you can see real pricing and features side-by-side rather than visiting each vendor separately.
The Bottom Line
A modest single-user business phone setup costs $20–$40/month. A five-person team with intermediate features runs $100–$200/month. Larger teams with advanced conferencing and analytics might spend $300+/month. Request detailed quotes from at least three providers, and always confirm whether taxes and fees are included in advertised prices.
Frequently Asked Questions
Q: Can I keep my existing phone number when switching to a VoIP provider? Yes—this is called number porting, and most VoIP providers handle it for a one-time fee ($10–$50). The process typically takes 3–7 business days.
Q: Do I need to buy a physical phone, or can I use my computer? You don't need one. Most business VoIP systems work via desktop software or mobile apps, though many businesses still use desk phones for convenience and professional appearance.
Q: Are there any VoIP providers with no long-term contracts? Many offer month-to-month plans, though the monthly cost is usually slightly higher than if you commit annually. Grasshopper, Vonage, and Ring Central all offer flexible terms.
Start comparing providers today to find the system that matches your team's size and budget.