3CX Review Australia: Pricing, Features, and Limitations (2026)

3CX is a software-based PBX that sits in an interesting position in the Australian market: more flexible than a typical hosted VOIP service, more affordable than enterprise phone systems, but requiring more technical involvement than most small businesses expect. This review covers what 3CX actually is, how pricing works in AUD, what you get at each licence tier, the hosting options available to Australian businesses, and the honest limitations that some vendors gloss over. By the end, you will know whether 3CX is the right fit for your business or whether a fully managed hosted VOIP service is a better starting point.

What Is 3CX?

3CX is a software PBX (Private Branch Exchange). Unlike a hosted VOIP service, 3CX is not a provider. It does not supply phone numbers or SIP trunks. It is a phone system platform that you install and run, either on your own hardware or a cloud server, or that a partner installs and manages for you.The distinction matters. When you sign up with a hosted VOIP provider like Maxotel, you get a complete service: numbers, SIP trunks, a hosted PBX, and a management portal, all in one. When you run 3CX, you have a PBX platform, but you still need a separate SIP trunk provider to supply phone numbers and carry your calls. That is an extra account, extra configuration, and extra cost to factor in.3CX runs on Windows or Linux. It supports physical desk phones (any SIP-compatible handset), softphones via its own web client and mobile apps, video conferencing, and a range of integrations. The product is popular globally and has a significant install base in Australian SMBs and mid-market companies. Its appeal is control: you decide where it runs, how it is configured, and which SIP trunk provider it connects to. That control comes with a corresponding responsibility to manage it.3CX uses an annual licence model based on simultaneous calls (SCs), not users or extensions. Simultaneous calls is the number of calls your system can handle at the same time. A business with 10 staff that typically has 2-3 calls happening at once only needs a 4SC licence, not a 10-user licence. This is fundamentally different from per-seat pricing, which tends to cost more at scale. Understanding the SC model is the key to getting 3CX pricing right.

3CX Pricing in Australia (2026)

3CX licences are sold annually. Pricing is based on two dimensions: the tier (SMB, PRO, or ENT) and the simultaneous call capacity (4SC, 8SC, 16SC, 32SC, 64SC, and above). There is also a free tier with genuine limitations. All AUD figures below are approximate and based on current reseller pricing in Australia. Actual pricing may vary by partner.Free tier (self-hosted only): Supports up to 10 simultaneous calls. Includes basic PBX features: extensions, ring groups, auto-attendant, voicemail, web client, and mobile app. Does not include call recording, CRM integration, Microsoft Teams integration, or advanced call centre features. Suitable for testing and evaluation, or for very small businesses with basic needs and in-house IT support.SMB tier: The entry-level paid tier. Includes all free tier features plus basic reporting and priority support. Annual pricing for Australian businesses runs approximately $175-200 AUD for 4SC, $300-350 AUD for 8SC, and $550-650 AUD for 16SC. These figures are for the licence only, self-hosted. Add hosting costs (a small cloud VPS from $10-25 AUD/month) and your SIP trunk costs on top.PRO tier: Adds call recording, CRM integration (Salesforce, HubSpot, Zoho, and others), hot-desking, advanced call queue features, and wallboards. Annual pricing approximately $400-450 AUD for 4SC, $700-800 AUD for 8SC, $1,300-1,500 AUD for 16SC. PRO is the minimum tier for businesses that need call recording for compliance or CRM integration for their sales or support workflows.ENT tier: Adds Microsoft Teams integration (Direct Routing), skill-based routing, custom IP Phone app, and advanced security features. Annual pricing approximately $600-700 AUD for 4SC, $1,100-1,200 AUD for 8SC, $2,000-2,500 AUD for 16SC. ENT is primarily justified for businesses with Microsoft Teams as their primary communication platform who want to bring PSTN calling into Teams.Partner-hosted pricing differs. Australian 3CX partners (including Maxotel, which offers a 3CX-hosted option) typically bundle the 3CX licence, hosting, and SIP trunks into a monthly per-user or per-SC price. This simplifies the cost structure but removes some of the flexibility of running your own instance.

3CX Features by Tier

Hosting Options for Australian Businesses

How you host 3CX determines your maintenance responsibilities, latency performance, and ongoing cost. There are four main options available to Australian businesses.

Option 1: Self-Hosted On-Premise

3CX runs on a server in your office or data centre. You own and manage the hardware. This was the traditional on-premise PBX model, updated for software.Pros: Full control. Data stays on-site. No ongoing hosting fees. Can operate without an internet connection for internal calls (though outbound PSTN calls still need a SIP trunk).Cons: You manage hardware, OS, and 3CX updates. Power outages and hardware failures take your phone system down. You need adequate internet bandwidth and a static IP for remote extension connectivity. This option suits businesses with a dedicated IT team, not small businesses relying on a part-time IT person or the business owner.

Option 2: Self-Hosted Cloud (AWS, Azure, Google Cloud, or VPS)

3CX is installed on a virtual machine in a cloud provider's infrastructure. You manage the VM and 3CX installation, but the hardware and data centre are managed by the cloud provider.Pros: No physical hardware to maintain. High availability with redundancy built into the cloud infrastructure. Can be provisioned and scaled quickly. Cost-effective for small deployments (a VPS adequate for a small 3CX install can be had for $10-25 AUD/month on providers like BinaryLane, Vultr, or DigitalOcean).Cons: You still manage 3CX updates, configuration, and security. Choosing a Sydney-region server is important for latency. If call quality is a priority, the VM needs to be on a network path with low latency and jitter to your SIP trunk provider.

Option 3: 3CX-Hosted

3CX offers its own hosted cloud option where 3CX manages the infrastructure and deploys your instance. You still manage your configuration (extensions, ring groups, routing), but 3CX handles the server, updates, and uptime.Pros: Reduces technical burden significantly. 3CX guarantees uptime and manages the platform. Good middle ground between full self-hosted and partner-hosted.Cons: You still configure and manage 3CX yourself. Technical knowledge is still required. Server regions are limited, and depending on the assigned region, latency for Australian businesses can be a factor. You still need a separate SIP trunk provider.

Option 4: Australian Partner-Hosted

An Australian 3CX-certified partner hosts, manages, and supports your 3CX instance on your behalf. Maxotel is one Australian provider offering this model. The partner manages the infrastructure, handles updates, and provides support. You get the 3CX feature set without the management overhead.Pros: Fully managed service with local Australian support. Ideal for businesses that want 3CX features without an IT person to manage the platform. The partner often bundles the SIP trunk and numbers, giving you a single bill and single point of support.Cons: Less flexibility than running your own instance. Pricing is higher than self-hosted because you are paying for the management overhead. You are dependent on the partner's support quality and SLA.For most Australian small businesses without dedicated IT support, partner-hosted is the most practical 3CX option. For businesses with an IT person, self-hosted on a Sydney-region cloud VPS is cost-effective and gives you full control.

Who 3CX Is Actually Good For

3CX earns its reputation among businesses that have specific conditions in place. It is not the right tool for everyone, but for the right audience it is genuinely excellent value.Businesses with in-house IT support. If you have an IT person on staff or a regular IT contractor, 3CX self-hosted is a compelling option. The setup and ongoing management is well within the capability of anyone with Linux or Windows Server administration experience. The 3CX documentation and community forums are thorough. Initial setup takes a day or two for someone competent. Ongoing management is light once the system is running.Cost-conscious businesses willing to self-manage. If you are comfortable managing a cloud VPS and have the time to learn 3CX configuration, the total cost of a 3CX deployment can be significantly lower than a fully managed hosted VOIP service. A 4SC SMB licence (~$175-200 AUD/year), a VPS (~$15 AUD/month, ~$180/year), and a SIP trunk with fair call rates can deliver a complete business phone system for under $600 AUD/year all-in for a small team. That is competitive with per-seat hosted services.Businesses with specific CRM or integration needs. 3CX PRO's native CRM integrations (Salesforce, HubSpot, Zoho, Freshdesk, and others) are well-implemented and a genuine productivity benefit for sales or support teams. If your team handles high call volumes and logs calls against CRM records, 3CX PRO's screen-pop and auto-logging features save meaningful time. A generic hosted VOIP service often cannot match this depth of integration without custom development.Businesses that need Microsoft Teams voice integration. If your business runs Teams for internal communication and you want PSTN calling (external calls) inside Teams, 3CX ENT's Teams Direct Routing integration is one of the cleaner ways to achieve this without signing up for Microsoft's own expensive Calling Plans. You get Teams as your softphone interface, with 3CX handling the call routing and a SIP trunk of your choice providing the numbers and PSTN access.

Who 3CX Is NOT Right For

Being clear about when 3CX is the wrong choice is as useful as knowing when it is right.Businesses with no IT support and no technical appetite. If you are a sole trader, a small retail operation, or a business where the owner "sorts out" IT by Googling things occasionally, 3CX self-hosted will create ongoing frustration. If this describes your situation, a fully managed hosted VOIP service is a better fit. Get a personalised recommendation based on your business type and team size. Updates need to be applied. Configuration changes need to be made correctly. When something breaks (and it will, as with any system), you need someone who knows how to diagnose it. Without that capability in-house, you will either pay heavily for partner support or run a system that gradually deteriorates. For this audience, a fully managed hosted VOIP service is the better starting point.Businesses that want a single-vendor fully managed service. 3CX requires assembling pieces: the 3CX licence, a SIP trunk provider, and hosting. Even with a partner-hosted option, you are working with a system that was built for technical users who want control. If you want to call one support number and have everything handled by one team, a dedicated hosted VOIP provider offers a simpler experience.Very small teams where the setup cost is not justified. For a 1-2 person business making and receiving modest call volumes, the effort of setting up and managing 3CX outweighs the cost savings over a simple hosted VOIP plan. A $30-40 AUD/month hosted VOIP plan with a managed PBX included is more appropriate. Reserve 3CX for teams of at least 5-10 users where the per-seat cost savings become meaningful and the setup effort is amortised.Businesses prioritising uptime simplicity. On a fully hosted service, if something goes wrong with the PBX, you call your provider. On self-hosted 3CX, if something goes wrong, you troubleshoot it. This is a significant operational difference. Businesses where any phone downtime has serious consequences (emergency services, medical, 24/7 support lines) should think carefully about whether self-managed infrastructure is appropriate.

Real Limitations to Know Before You Commit

These are the things 3CX sales materials tend to underemphasise, but that matter in practice.Version updates are your responsibility. 3CX releases major versions periodically (V16, V18, V20 are recent examples). Major version upgrades are not trivial. They require a backup, a clean install or upgrade process, and testing. 3CX eventually ends support for older versions, so running a legacy version creates security risk. If you self-host, factoring in one major upgrade per 12-18 months is realistic. Missing an upgrade cycle means you are running unsupported software on your phone system.The support model depends on how you run it. 3CX provides documentation and community forums. If you have a maintenance contract through a partner or a partner-hosted arrangement, you have real support. If you are self-hosting on the free or SMB tier, you are largely reliant on the forum community and documentation. The community is active and the documentation is good, but it is not the same as calling a support line and having someone fix it for you.The free tier is genuinely limited, not just marketed as limited. The 10SC cap sounds generous for small businesses, but free tier excludes call recording, CRM integration, and advanced reporting. If you try 3CX free and decide to upgrade to PRO for call recording, you are looking at a significant jump in annual cost. Model the full-tier cost before committing to the platform, not just the free tier cost.Teams integration is ENT-only. If you are evaluating 3CX specifically because you want to bring PSTN calling into Microsoft Teams, you need the ENT licence. SMB and PRO do not include Teams Direct Routing integration. This means the total cost for a Teams-integrated 3CX deployment is significantly higher than basic tier pricing suggests.You still need a SIP trunk provider. 3CX does not provide phone numbers or carry your calls. You need a separate SIP trunk account with a provider like Internode, Twilio, or a specialist VOIP carrier. This is an additional account, additional cost, and additional complexity to configure and troubleshoot. Factor it into your total cost of ownership.

3CX vs Hosted VOIP Service vs FreePBX

For a deeper comparison of 3CX against FreePBX specifically, including a side-by-side of their Asterisk architecture, configuration complexity, and community support quality, see our dedicated guide: 3CX vs FreePBX: Which Is Right for Your Business?

3CX in Australia: What You Need to Know

NBN compatibility: 3CX works over any NBN connection that provides adequate upload bandwidth and acceptable jitter. The minimum for a VOIP call is approximately 100 kbps per simultaneous call with the G.711 codec, though 3CX also supports G.729 and Opus for lower-bandwidth scenarios. If your office is on NBN12 or a congested service, call quality issues are a real risk. See our guide on NBN VOIP setup for Australian businesses for bandwidth sizing.Australian SIP trunk options with 3CX: 3CX is compatible with Australian SIP trunk providers including Internode, Symbio Networks, Twilio (Australian numbers), and others. Many 3CX partners in Australia also offer their own SIP trunks bundled with their managed 3CX service. Using an Australian-hosted SIP trunk reduces latency compared to international trunk providers.PSTN shutdown implications: The Australian PSTN copper network was shut down in 2025. Businesses still on ISDN or copper PBX setups need to migrate. 3CX is a natural migration target for businesses with existing Cisco, Avaya, or NEC on-premise PBX systems that need to move to a software-defined platform. The migration involves porting numbers to a SIP trunk and replacing the PBX hardware with a 3CX software instance.1300 and 1800 numbers with 3CX: 3CX handles inbound 1300 and 1800 numbers identically to standard geographic numbers. The 1300/1800 number itself is managed by your SIP trunk provider. Routing of that number to your 3CX extensions, ring groups, and IVR menus is configured within 3CX. You can set time-of-day routing, overflow routing, and after-hours messages on 1300 numbers exactly as you would any other DID.Australian partner ecosystem: 3CX has an active partner network in Australia. Certified 3CX partners can supply, install, configure, and support 3CX deployments. Maxotel offers 3CX as a hosted option. Other Australian MSPs and IT service providers are 3CX certified resellers. If you want to run 3CX but do not have in-house IT, an Australian partner-hosted arrangement is the most practical path. Compare partner pricing on the licence, hosting, and SIP trunk bundle before committing.

What Most Businesses Get Wrong with 3CX

Mistake 1: Starting with 3CX without an IT resource in place. The most common 3CX failure story goes like this: a business owner installs 3CX free tier on a cloud VPS following a YouTube tutorial. It works initially. Three months later, an update notification is ignored. Six months later, a configuration change is needed but the person who set it up has forgotten the steps. A year later, the system is running an outdated version with known security vulnerabilities, the original configuration is a mess, and the business is paying for a phone system that half the team has given up on and uses their mobiles instead. 3CX requires someone who will own and maintain it. If that person does not exist in your business, either hire a partner or choose a different platform.Mistake 2: Choosing the wrong tier based on the free price, not the required features. Businesses that need call recording (for compliance, training, or dispute resolution) must be on PRO tier. Businesses that want Microsoft Teams integration must be on ENT. If you scope your 3CX deployment based on the free or SMB tier pricing and then discover you need PRO features, you are looking at a significant jump in cost. Always model the full required tier cost before committing to the platform.Mistake 3: Forgetting to include the SIP trunk cost in the total. 3CX licence pricing looks attractive until you add the SIP trunk. A typical Australian SIP trunk for a small business (a few concurrent channels, reasonable call bundle) adds $50-100 AUD/month to your total. Factor this in from the start when comparing 3CX to a hosted VOIP plan that includes the SIP trunk.

3CX Pros and Cons

Is 3CX free really free?

Yes, the 3CX free tier is genuinely free with no trial expiry. It supports up to 10 simultaneous calls, includes extensions, ring groups, auto-attendant, voicemail, web client, and mobile apps. The limitations are real, not artificial: no call recording, no CRM integration, no Teams integration, no advanced reporting. For a small business with basic needs and in-house IT support, the free tier can run indefinitely. You do still need to pay for hosting (a VPS, approximately $10-25 AUD/month) and a SIP trunk.

Can I use 3CX with my existing desk phones?

Yes, provided your desk phones are SIP-compatible. 3CX is compatible with most SIP-based handsets including Yealink, Grandstream, Snom, Fanvil, and others. Many of these can be auto-provisioned directly from the 3CX management console. IP phones that are not SIP-based (for example, phones tied to a proprietary Cisco or Avaya protocol) are not compatible. Check the 3CX compatibility list on their website before assuming your existing hardware will work.

How does 3CX compare to a hosted VOIP service like Maxotel?

A hosted VOIP service like Maxotel gives you a complete managed service: numbers, SIP trunks, a hosted PBX, support, and a management portal, all in one. You do not manage infrastructure. 3CX is a platform, not a service. It requires you to source and manage hosting, a SIP trunk, and the 3CX configuration yourself (or via a partner). Maxotel is simpler to operate and suitable for businesses without IT resources. 3CX gives you more control, lower per-seat cost at scale, and deeper integrations, but requires technical competence to run. For most Australian small businesses under 20 staff without a dedicated IT person, a fully managed hosted VOIP service is the better starting point. 3CX is better suited to businesses with IT support or specific integration requirements. See our guide on best VOIP providers for Australian small businesses for a broader comparison.

What do I need to self-host 3CX in Australia?

For a small business self-hosted deployment, you need: a cloud VPS in a Sydney or Australian region (BinaryLane, Vultr, DigitalOcean, or AWS ap-southeast-2 all work well), running Debian Linux or Windows Server. Minimum specs for a small deployment are 2 vCPU, 2GB RAM, 30GB storage. You then install 3CX on that server using their installation wizard, configure your extensions and call routing, and connect a SIP trunk from an Australian SIP carrier. A static IP on the VPS is recommended. The total setup time for someone experienced with Linux and VOIP configuration is 4-8 hours for a basic setup. The 3CX documentation covers the installation process in detail.

Does 3CX work with NBN in Australia?

Yes. 3CX runs over any internet connection including NBN. The requirements are the same as any VOIP service: adequate upload bandwidth (100 kbps per simultaneous call with G.711), low jitter (under 20ms), and low packet loss (under 1%). On most NBN plans, these requirements are met comfortably. Where call quality suffers, the issue is usually jitter from a congested NBN connection or a router that is not prioritising VOIP traffic. Setting QoS (Quality of Service) on your router to prioritise VOIP traffic resolves most call quality issues. See our guide on NBN VOIP setup for details.

How many users can 3CX support?

3CX has no hard limit on the number of extensions (users). The simultaneous call licence limits how many calls can happen at once, not how many extensions can be registered. A 4SC licence with 30 extensions is perfectly valid. 3CX scales from small businesses on a 4SC licence up to enterprise deployments with hundreds of simultaneous calls. The server hardware you run it on needs to be sized appropriately for larger deployments, but the software itself is not artificially capped on extensions.

What happens when I upgrade from one 3CX tier to another?

Upgrading your 3CX tier requires purchasing a new licence key at the higher tier. Your existing configuration (extensions, routing, recordings) is preserved. You apply the new licence key in the 3CX management console and the additional features become available immediately. Downgrading is more complex: features from the higher tier that are not included in the lower tier stop working. If you have configured call recording or CRM integrations and downgrade to SMB, those features are disabled. Plan your tier selection at the start rather than expecting to upgrade gradually, particularly if you have compliance requirements around call recording.