Phone System for 10 Employees Australia (2026)

A 10-person Australian business does not need 10 phone lines. Most offices with 10 employees need 4 to 6 concurrent call channels, a hosted PBX, a mix of desk phones and softphones, and a monthly spend between $350 and $700 AUD depending on features and hardware rental. This guide breaks down exactly what a phone system for 10 employees actually looks like in practice, based on real AU provider pricing, NBN deployment realities, and the common sizing mistakes that push small businesses into oversized plans. By the end, you will know how to size your system correctly, which features are worth paying for at this scale, which ones are not, and what the total monthly cost should look like.

Quick Cost Summary

Before diving into detail, here is what a properly sized phone system for 10 employees typically costs in Australia. These figures assume you are buying or renting hardware through your provider and using a hosted PBX rather than on-premise equipment. Hardware is often the biggest upfront cost, but most AU providers offer rental or bundled options that spread this across your monthly bill. Use the VoIP Cost Calculator to get a personalised estimate based on your specific needs.

Why 10 Employees Does Not Mean 10 Phone Lines

This is the single most expensive mistake businesses make when sizing a phone system. A provider quotes you for 10 lines because you said you have 10 staff, and you assume that is correct. It is almost never correct.In a typical 10-person office, not everyone is on the phone at the same time. Think about your actual day. The warehouse staff do not take customer calls. The person doing accounts might take two calls a day. The two sales staff are on the phone regularly, but rarely both at the exact same moment. The office manager handles most inbound calls.The metric that matters is concurrent call channels, not headcount. A concurrent call channel is one active phone conversation. If three people are on the phone simultaneously, you need three channels. Most 10-person businesses peak at 4 to 6 concurrent calls, even during their busiest hour.Use the Phone System Sizing Wizard to calculate your actual concurrent call requirement. It asks about your team roles, call patterns, and peak hours to give you a realistic number rather than a headcount-based guess.

Sizing Your System: A Worked Example

Here is a realistic example for a 10-person professional services firm (accountants, consultants, allied health, similar). Peak concurrent calls: 4 to 5. This business needs 5 to 6 SIP channels (always add one or two for headroom), not 10. That means 5 to 6 desk phone licences plus 2 softphone licences for the mobile workers. Total: 7 to 8 user licences, not 10.The difference matters financially. At $30 AUD per user per month on a mid-range plan, sizing correctly saves $60 to $90 per month. Over a two-year contract period, that is $1,440 to $2,160 AUD saved just by counting correctly.

Hosted PBX vs On-Premise: Which Makes Sense at 10 Employees?

At 10 employees, hosted PBX wins almost every time. Here is why.Hosted PBX (cloud-based): The phone system runs on the provider's servers. You pay a per-user monthly fee. The provider handles all maintenance, updates, and redundancy. Setup takes days, not weeks. If your office internet goes down, calls can automatically route to mobile phones. You do not need any server hardware on-site. For a 10-person business without dedicated IT staff, this is the right choice in almost every scenario.On-premise PBX: You buy a physical PBX appliance (or run software like 3CX or FreePBX on your own server) and host everything locally. You own the hardware. You manage updates. You need someone who understands SIP trunking, firewall rules, and NAT traversal. The upfront cost is higher ($2,000 to $8,000 AUD for hardware alone), but the ongoing per-user cost is lower because you are only paying for SIP trunk channels, not per-user platform fees.On-premise makes financial sense when you have 25 or more users, dedicated IT support, and the willingness to manage the system yourself. At 10 users, the math does not work. You spend more upfront, take on all the maintenance risk, and the monthly savings compared to hosted are small enough that one support callout wipes out a year of savings.

The Right Hardware Mix for a 10-Person Office

Not every employee needs the same phone. Buying 10 identical desk phones is wasteful. Here is a realistic hardware mix for the example above.

Desk Phones for Office-Based Staff

Office-based staff who handle calls regularly need a proper SIP desk phone. For most roles, a mid-range phone like the Yealink T33G (~$120 AUD) or T34W (~$150 AUD) is more than sufficient. These phones have colour screens, HD voice, and support multiple lines per handset.Reception gets the best phone. The person answering and transferring calls all day needs a phone with a large screen, programmable keys for quick transfer (BLF keys that show which extensions are busy), and a good headset port. A Yealink T46U (~$280 AUD) or T54W (~$350 AUD) is typical for reception. This is not luxury spending. A receptionist with a basic phone and no BLF keys is slower at transfers, puts callers on hold longer, and makes more transfer errors.

Softphones for Mobile Workers

Staff who work from home, travel, or split between office and site do not need a desk phone at all. A softphone app on their mobile or laptop gives them full access to the business phone system, including transferring calls, seeing who is available, and appearing as the business number on caller ID.Most hosted PBX providers include a softphone app with the user licence at no extra cost. Brands like Maxotel, 8x8, and RingCentral all have mobile apps for iOS and Android. The quality is good over WiFi or 4G/5G. It is marginal on congested public WiFi or poor mobile signal areas.

Conference Phone for the Meeting Room

If your team has a meeting room where group calls happen, a dedicated conference phone makes a noticeable difference. Speakerphone on a desk phone sounds awful for multi-person calls because the microphone is directional and close-range.A dedicated conference phone like the Yealink CP920 (~$400 AUD) or Poly Trio C60 (~$700 AUD) has omnidirectional microphones that pick up voices from across a room. For a 10-person office with even occasional client conference calls, this is worth the spend. For internal team calls only, a decent Bluetooth speakerphone like a Jabra Speak 510 (~$180 AUD) connected to a laptop softphone works fine.

Recommended Hardware Mix (10 Employees)

Total hardware outlay: approximately $1,500 to $2,200 AUD. Many providers offer rental plans that bundle hardware into your monthly fee at $5 to $15 AUD per device, eliminating the upfront cost entirely. Ask your provider about bundled hardware options before buying separately.

Features That Matter at 10 Employees

At this size, the features you actually use are straightforward. You do not need enterprise-grade analytics or complex multi-level IVR trees. You need the basics done well.

Must-Have Features

Auto-attendant: The recorded greeting that plays when someone calls. "Thanks for calling [Business Name]. For sales, press 1. For support, press 2. For accounts, press 3." This costs nothing extra on virtually every hosted PBX plan and makes a business sound professional from the first ring. If you are still answering every call personally or letting it ring to voicemail, an auto-attendant is the single biggest professionalism upgrade you can make.Ring groups: When a call comes in for sales, all three sales phones ring simultaneously. First to pick up gets the call. This eliminates the scenario where a customer calls, one phone rings, nobody answers, and the lead is gone. With a ring group, any available person can grab it. Ring groups are standard on all modern phone systems, but you need to configure them properly.Voicemail-to-email: When a caller leaves a voicemail, the recording is sent to your email inbox as an audio file (and sometimes a transcription). This means you do not have to dial into a voicemail box and listen to messages one at a time. You see them in your email, you can forward them to the right person, and you can listen from your phone while away from the office.Call recording: Records inbound and outbound calls and stores them in the cloud. Essential for training, dispute resolution, and compliance. In Australia, you must inform callers that the call is being recorded (one-party consent applies in most states, but best practice is to include it in your auto-attendant greeting). Most providers include basic call recording in mid-range plans.After-hours routing: Calls outside business hours go to voicemail, to a mobile number, or play a custom message. This sounds obvious, but if your current setup is a single phone with no system behind it, there is no concept of business hours. Every call rings the same way at 3pm and 3am.

Nice-to-Have Features

Call queue with hold music: If your reception or sales line gets more than two or three concurrent calls regularly, a call queue puts callers on hold with music and a position announcement ("You are caller number 2"). This reduces hang-ups. For most 10-person businesses, a ring group is sufficient and a formal call queue is overkill. But if your business is appointment-based (medical, allied health, trades) and gets clusters of calls at peak times, the queue helps.Presence/BLF indicators: Busy Lamp Field keys on desk phones show which extensions are currently on a call (red light) or available (green light). This is most useful for reception. Before transferring a call, the receptionist can see at a glance whether the person is available. Without BLF, they have to guess, try the transfer, and potentially send the caller to voicemail.Mobile app integration: The provider's softphone app on your personal mobile lets you make and receive business calls using the business number. Useful for staff who occasionally work from home or need to take business calls outside the office. Most providers include this free.

Features You Do Not Need Yet

Enterprise analytics dashboards: Real-time wallboard showing call volumes, average hold times, abandonment rates. This is contact centre territory. A 10-person office does not generate enough call volume to make this data actionable. You will know if calls are being missed without a wallboard.Complex multi-level IVR: "Press 1 for sales, then press 2 for residential, then press 3 for quotes." For a 10-person business, more than one level of IVR menu frustrates callers. Keep it to one level: sales, support, accounts. Three options maximum. If the caller needs to press more than two buttons to reach a human, your IVR is too complex for your size.CRM integration: Popping customer records when the phone rings is powerful, but it requires configuration work and a compatible CRM. At 10 employees, unless your entire business model is outbound sales or you are already running a CRM like HubSpot or Salesforce, this is a phase-two project. Get the phone system working first.AI call transcription/summarisation: Several providers are adding AI-powered features to their premium tiers. These are genuinely useful for businesses handling high call volumes. At 10 employees, the extra cost ($10 to $20 AUD per user per month on top of your base plan) is hard to justify unless you have a specific compliance or documentation need.

Monthly Cost Breakdown: What You Should Actually Pay

Here is a realistic monthly breakdown for a 10-person office using a hosted PBX provider in Australia. Prices reflect 2026 AU market rates from providers like Maxotel, Vonage Business, 8x8, and RingCentral. Realistic total: $350 to $500 AUD per month for a properly sized 10-person business phone system with mid-range features. If you are being quoted significantly more than this, you are likely being oversold on user licences, premium features you do not need, or hardware you could rent more cheaply.Compare this to the cost of staying on your ISP's basic phone service. The ISP line itself might only cost $10 to $20 AUD per month, but the hidden costs are real: lost leads from busy signals, no after-hours handling, no call recording, no ring groups, and no way to look professional when a customer calls. One lost customer per month likely costs more than the entire phone system.

NBN Connection Requirements

Your NBN connection type matters for VOIP quality. A 10-person office running 4 to 6 concurrent calls needs sufficient upload bandwidth and a stable connection.Bandwidth requirement: Each concurrent VOIP call uses approximately 100 Kbps of upload and download bandwidth (using the G.711 codec, which delivers the best call quality). Six concurrent calls need about 600 Kbps each way. This is a tiny fraction of even a basic NBN 25/5 plan. Bandwidth is almost never the bottleneck. Use the VoIP Bandwidth Calculator to check your specific scenario.What actually causes problems: Jitter and packet loss, not bandwidth. If your office has 10 people streaming video, downloading large files, and running cloud applications while calls are happening, the router can become congested. Voice packets arrive late or out of order, and call quality degrades. This is not a bandwidth problem. It is a traffic prioritisation problem.The fix is QoS (Quality of Service) settings on your router, which prioritise voice traffic over everything else. Most business-grade routers support this. Consumer-grade ISP modems often do not. If your office is running on the ISP-supplied modem with 10 people sharing the connection, consider upgrading to a business-grade router (Ubiquiti, TP-Link Omada, or similar) and keeping the ISP modem in bridge mode.

NBN Connection Types and VOIP Quality

Number Porting: Keeping Your Existing Number

If your business already has an established phone number, you want to keep it. Number porting in Australia transfers your existing number from your current provider to your new VOIP provider.The process typically takes 5 to 10 business days for a standard geographic number. During this period, your old service remains active. On the port date, there is usually a brief cutover window (minutes to a few hours) where calls may not connect. Your new provider should give you a temporary number to use during setup and testing before the port completes.Important: Do not cancel your existing phone service before the port is complete. If you cancel first, you lose the number permanently. The porting process handles the cancellation automatically. Also check if your existing provider charges an early termination fee, particularly if you are on a contract. Under Australian Consumer Law, you have the right to port your number regardless of your contract status, but the provider can still charge the ETF.

What Most Businesses Get Wrong

After seeing hundreds of 10-person businesses set up phone systems, these are the three mistakes that come up repeatedly.

Mistake 1: Buying 10 Lines for 10 People

Already covered above, but it bears repeating because it is the most expensive mistake. Providers benefit from selling you more licences. They will not tell you that you only need 7 or 8. You need to do the concurrent call analysis yourself (or use our sizing wizard) and push back on the quote. A business that gets this right saves $600 to $2,000 AUD per year.

Mistake 2: Starting with Handsets Instead of the System

This is the most common path: someone in the business is told to "sort the phones out," so they search for business phones, find a Yealink on Amazon, and buy it. Then they discover it does not plug into their ISP modem's green phone port. It connects via Ethernet and needs SIP credentials from a VOIP service, which their ISP will not provide. The phone sits in a drawer.The correct order is: choose a provider, choose a plan, let the provider recommend compatible hardware, then buy or rent the phones. Many providers will pre-configure the phones before shipping them to you, so they work out of the box. Starting with hardware is backwards and creates compatibility headaches.

Mistake 3: Paying for Premium Features You Will Never Configure

CRM integration, AI transcription, advanced analytics, workforce management. These features appear on the premium tier pricing page and sound impressive. But if nobody in your 10-person business is going to configure them, maintain them, or look at the dashboards, you are paying an extra $10 to $20 per user per month for nothing. Start with a mid-range plan. You can always upgrade the plan tier later if you genuinely need the premium features. Downgrading from a premium plan you signed a contract for is much harder.

Choosing a Provider: What to Look For

For a 10-person business, the provider matters more than the specific plan or handset. A good provider makes the whole process painless. A bad one leaves you stuck configuring SIP settings yourself.AU-based support: This is non-negotiable for business communications. When your phones go down, you need to speak to someone who understands NBN connection types, Australian number porting rules, and business hours in your timezone. Offshore support reading from a script is not acceptable for a system your business depends on.Consultative onboarding: The best SMB-focused providers ask how your business actually works before recommending a plan. They will ask about your team structure, call patterns, peak hours, and growth plans. If a provider quotes you based solely on headcount without asking these questions, they are selling you a commodity, not a solution.Included setup and configuration: At 10 users, your provider should be setting up the PBX for you. Ring groups, auto-attendant recordings, business hours rules, voicemail boxes, handset provisioning. This should be included in the setup fee or the first month, not charged as professional services at $150 per hour. If you are being asked to self-configure via a web portal with no guidance, the provider is not set up to serve businesses your size.Number porting handled end-to-end: The provider should manage the entire porting process. You give them your existing number, your current provider's account details, and they handle the rest. If they are asking you to fill out ACMA forms and liaise with your current provider yourself, that is a red flag.Contract flexibility: Month-to-month is ideal but rare at discounted rates. 12-month contracts are standard. 24 to 36 months should come with a significant per-user discount. Never sign a long contract without testing the service first. Most providers offer a trial period or money-back guarantee within the first 30 days.

The Setup Process: What to Expect

Setting up a phone system for 10 users with a hosted PBX provider typically takes 1 to 3 weeks from initial conversation to fully operational. Here is what the process looks like.Week 1 - Consultation and quoting: You speak with the provider about your requirements. They recommend a plan, user count, and hardware. You get a quote. If number porting is involved, the porting request is submitted early because it takes 5 to 10 business days.Week 1-2 - Hardware and configuration: Phones are shipped (or picked up from an AU warehouse). The provider configures your hosted PBX: sets up extensions, ring groups, auto-attendant, voicemail boxes, business hours rules. If phones are pre-provisioned, they arrive ready to plug in. If not, the provider walks you through the setup over the phone.Week 2-3 - Testing and port completion: You test the system using a temporary number. Make internal calls, test transfers, check voicemail, verify the auto-attendant works correctly. When the number port completes, your existing business number starts ringing on the new system. You test inbound calls on the ported number and confirm everything works.Ongoing: The provider handles system updates, security patches, and platform maintenance. You manage day-to-day changes (adding a user, changing a ring group, updating business hours) through a web portal or by calling your provider's support line.

Power Outages and Business Continuity

This catches businesses off guard. VOIP runs over your internet connection, and your internet runs on your NBN equipment, and your NBN equipment runs on mains power. When the power goes out, your phones go down. This is different from the old PSTN copper network, which carried its own power and kept working during blackouts.For a 10-person business, the practical options are: a UPS (uninterruptible power supply) on your modem and router (keeps you running for 30 to 60 minutes, around $150 to $300 AUD), 4G/5G failover on your router (automatically switches to mobile data if your NBN drops, from $30 to $50 AUD per month for a backup SIM), or automatic call forwarding to mobile numbers (most hosted PBX providers offer this as a built-in feature that activates when the system detects your desk phones are offline).The hosted PBX failover option is the best for most businesses. It requires no hardware and works automatically. When the power goes out, the hosted PBX detects that your desk phones have dropped offline and routes calls to your designated mobile numbers within seconds. When power returns, calls route back to desk phones automatically. Ask your provider if this is included.

Emergency Calling (000) on VOIP

VOIP services in Australia are required by ACMA to support 000 emergency calling. However, there are limitations. Location information may not be automatically transmitted to emergency services the way it is with a traditional landline. Your VOIP provider should register your service address, but if your business operates across multiple locations or has remote workers, the registered address may not match the caller's actual location. Check with your provider that your service address is correctly registered and understand the limitations before relying on VOIP as your sole 000 access.

Your Next Steps

If you are a 10-person business ready to set up or upgrade your phone system, here is the practical checklist.1. Count your actual concurrent call needs. Do not default to 10. Use the Phone System Sizing Wizard or count manually: how many people are on the phone at the same time during your busiest hour? Add 1 to 2 for headroom. That is your channel requirement.2. Map your hardware mix. Who needs a desk phone? Who can use a softphone? Does your meeting room need a conference phone? Do not buy 10 identical phones.3. Check your NBN connection. Run the VoIP Bandwidth Calculator to confirm your connection supports your concurrent call target. If you are on FTTN or fixed wireless, test call quality before committing.4. Talk to a specialist VOIP provider, not your ISP. Your ISP will sell you a bundled package. A specialist provider will ask how your business works and size the system correctly. The difference in outcome is significant.5. Do not cancel your existing service before the port completes. Start the number porting process early and let the new provider handle the transfer.6. Test before going live. Use the temporary number your provider gives you. Test ring groups, voicemail, after-hours routing, and call transfers. Do not discover problems on the day the port completes.

How many phone lines does a business with 10 employees actually need?

Most 10-person businesses need 4 to 6 concurrent call channels, not 10. The number depends on how many staff are on the phone at the same time during peak hours. Office-based staff with moderate call volumes typically peak at 40-60% of headcount for simultaneous calls.

How much does a phone system for 10 employees cost per month in Australia?

A properly sized hosted PBX system for 10 employees typically costs between $350 and $500 AUD per month, including user licences, call charges, and hardware rental. Costs vary based on provider, plan tier, and hardware choices. Use the VoIP Cost Calculator at /tools/voip-cost-calculator/ for a personalised estimate.

Should a 10-person business use hosted PBX or on-premise PBX?

Hosted PBX is the right choice for almost every 10-person business. It requires no server hardware, no IT expertise, and the provider handles all maintenance. On-premise PBX only makes financial sense at 25 or more users with dedicated IT support.

Can I keep my existing business phone number when switching to VOIP?

Yes. Number porting in Australia transfers your existing number to your new VOIP provider. The process takes 5 to 10 business days for standard geographic numbers. Do not cancel your existing service before the port is complete, or you risk losing the number permanently.

Do all 10 employees need a physical desk phone?

No. Staff who work remotely, travel, or are rarely in the office can use a softphone app on their mobile or laptop instead. Most hosted PBX providers include the softphone app free with the user licence. A typical 10-person office might have 5-6 desk phones, 2-3 softphone users, and 1 conference phone.

What happens to my VOIP phones during a power outage?

VOIP phones stop working when the power goes out because they depend on your internet connection and network equipment. The best mitigation is hosted PBX automatic failover, which routes calls to designated mobile numbers when desk phones go offline. A UPS on your modem and router provides 30 to 60 minutes of backup power for short outages.

What NBN connection type do I need for 10-person VOIP?

FTTP and FTTC are ideal. HFC works well with QoS configured. FTTN is acceptable but test call quality first. Fixed wireless is marginal for business VOIP. Satellite is not suitable. Each concurrent call uses about 100 Kbps each way, so bandwidth is rarely the issue. Jitter and packet loss are what degrade call quality.