Business Internet Options in Australia: NBN, Ethernet, SD-WAN, 5G

Why Does Choosing the Right Business Internet Matter?

Internet connectivity is no longer a utility — it is infrastructure. Australian businesses now run voice calls, video conferencing, cloud applications, point-of-sale systems, and entire ERP platforms over their internet connection. When connectivity fails or underperforms, the impact is immediate and measurable.

According to the Australian Bureau of Statistics (ABS), 97% of Australian businesses with 20 or more employees use the internet for daily operations, with 73% relying on cloud-hosted applications as their primary business tools. The choice of internet technology directly affects application performance, uptime, and ultimately, productivity.

This guide compares the four major business internet options available in Australia — NBN, Enterprise Ethernet, SD-WAN, and 5G Fixed Wireless — and provides a framework for deciding which is right for your organisation.

What Are the Main Business Internet Options?

NBN Business Plans

The National Broadband Network (NBN) is the most widely available business internet option in Australia. NBN Co offers specific business-grade tiers through its Enterprise Ethernet and business nbn products, while retail service providers (RSPs) sell NBN plans with varying levels of support and SLA.

Key characteristics:

• Available to approximately 95% of Australian premises
• Business-grade plans offer symmetric speeds (equal upload and download) at higher tiers
• Typical download speeds range from 50 Mbps to 1 Gbps depending on the plan and technology type (FTTP, FTTC, HFC, FTTB)
• SLAs vary significantly between RSPs — some offer basic best-effort, while others provide 4-hour fault restoration commitments
• Most cost-effective option for single-site businesses with moderate bandwidth requirements

Best suited for: Small to medium businesses at a single site, branch offices, and retail locations where cost is a primary consideration and some variability in performance is acceptable.

Enterprise Ethernet

Enterprise Ethernet (also called business-grade fibre or dedicated internet) provides a dedicated, uncontended fibre connection between your premises and the carrier's network. Unlike NBN, which shares bandwidth across multiple premises, Ethernet delivers guaranteed symmetric speeds.

Key characteristics:

• Symmetric speeds from 10 Mbps to 10 Gbps
• Guaranteed bandwidth — not shared with other users (1:1 contention ratio)
• Enterprise-grade SLAs with 4-hour or same-day fault restoration
• Available primarily in CBD and metropolitan areas, with some regional availability
• Requires a fibre build if the premises is not already connected, which can take 60-90 business days
• Significantly more expensive than NBN, but with measurably better performance and reliability

Best suited for: Head offices, data-intensive operations, businesses running latency-sensitive applications (voice, video, real-time data), and any organisation where downtime has a direct revenue impact.

SD-WAN

SD-WAN (Software-Defined Wide Area Network) is not a connectivity type per se — it is an overlay technology that intelligently manages traffic across multiple underlying connections. SD-WAN uses software to bond, load-balance, and prioritise traffic across any combination of NBN, Ethernet, 4G, and 5G links.

Key characteristics:

• Aggregates multiple connections for combined bandwidth and redundancy
• Application-aware routing prioritises business-critical traffic (e.g., voice and video get priority over file downloads)
• Integrated security features including firewall, encryption, and threat detection
• Centralised management across all sites from a single portal
• Requires edge hardware at each site (provided as part of a managed service)
• Delivers MPLS-like performance at a fraction of the cost

Best suited for: Multi-site businesses (3+ locations), organisations migrating to cloud platforms, and any business requiring genuine redundancy without the cost of dedicated Ethernet at every site.

5G Fixed Wireless

5G Fixed Wireless uses the mobile 5G network to deliver broadband connectivity to a fixed location. It is the newest entrant to the business internet market in Australia and is rapidly improving in both coverage and capability.

Key characteristics:

• Download speeds typically range from 100 Mbps to 500 Mbps, with theoretical peaks above 1 Gbps
• No physical line required — deployment takes days, not weeks
• Coverage is currently limited to metropolitan and select regional areas
• Latency is higher than fibre (typically 15-30ms vs 1-5ms for Ethernet)
• Subject to network congestion during peak periods
• Increasingly used as a primary connection for small offices or as a backup link for larger sites

Best suited for: Temporary sites, locations where fibre is unavailable or impractical, backup connectivity, and businesses needing rapid deployment.

How Do These Options Compare?

Feature	NBN Business	Enterprise Ethernet	SD-WAN	5G Fixed Wireless
Typical download speed	50-1,000 Mbps	100-10,000 Mbps	Combined underlay speeds	100-500 Mbps
Upload speed	20-400 Mbps	Symmetric (same as download)	Combined underlay speeds	20-100 Mbps
Contention ratio	Shared (varies by RSP)	1:1 dedicated	Depends on underlay	Shared (carrier network)
Typical latency	5-20 ms	1-5 ms	2-10 ms (with optimisation)	15-30 ms
SLA (fault restoration)	1-2 business days	4 hours - same day	Automatic failover	Best effort
Monthly cost (indicative)	$80-$500	$500-$3,000+	$200-$800 per site	$75-$300
Deployment time	1-3 weeks	60-90 business days	2-4 weeks	3-7 days
Availability	~95% of premises	Metro/CBD primarily	Any premises with internet	Metro + select regional
Redundancy	Single link	Single link	Multi-link, multi-carrier	Single wireless link

Note: Costs are indicative and vary by provider, location, and speed tier. All prices are exclusive of GST.

When Should You Choose Each Option?

Choose NBN Business When:

• You are a single-site business with fewer than 50 users
• Your primary applications are email, web browsing, and standard cloud platforms
• Cost is a significant consideration and some performance variability is acceptable
• Your site is not in an area served by enterprise Ethernet
• You need a cost-effective backup connection alongside a primary Ethernet service

Choose Enterprise Ethernet When:

• You run latency-sensitive applications such as VoIP, video conferencing, or real-time data platforms
• Your site has 50+ users or high aggregate bandwidth requirements
• You require guaranteed uptime with contractual SLA commitments
• Your business operations are concentrated at one or two major sites
• You are willing to pay a premium for consistent, dedicated performance

Choose SD-WAN When:

• You have three or more business locations that need to be connected
• You want MPLS-like performance without MPLS pricing
• You are migrating to cloud platforms and need optimised cloud connectivity
• You need genuine multi-carrier redundancy at every site
• You want centralised visibility and control over your network across all sites

According to Gartner, Australian businesses that deployed SD-WAN in 2024 reported an average 40% reduction in WAN costs compared to traditional MPLS, while simultaneously improving application performance by 25-35%.

Choose 5G Fixed Wireless When:

• You need connectivity deployed within days, not weeks
• Your site is temporary or semi-permanent (construction sites, pop-up retail, events)
• Fibre is not available at your location and NBN performance is inadequate
• You need a wireless backup connection for business continuity
• Your applications can tolerate slightly higher latency than fibre delivers

What About Combining Options?

The most resilient approach is to combine technologies rather than relying on a single connection type. Common combinations include:

• Ethernet + NBN backup: Dedicated fibre for primary connectivity with a cost-effective NBN connection as failover on a different physical path
• NBN + 5G backup: Affordable primary connectivity with wireless failover that operates independently of the fixed-line network
• SD-WAN across mixed underlay: The most flexible approach, where SD-WAN automatically manages traffic across Ethernet, NBN, and 5G connections at each site

An independent aggregator like PCONNECT can design multi-carrier solutions that combine these technologies across different underlying carriers, ensuring that no single point of failure can take your business offline.

How Should You Evaluate Business Internet Providers?

Beyond the technology itself, the provider you choose significantly affects your experience. Key evaluation criteria include:

• Carrier independence: Does the provider offer multiple carrier options, or are they locked to one network?
• SLA commitments: What are the specific fault restoration timeframes, and what compensation is available if they are not met?
• Proactive monitoring: Does the provider monitor your connections 24/7 and alert you before you notice a problem?
• Transition management: Will the provider manage the entire migration from your current service, including any parallel running required?
• Scalability: Can you upgrade speeds or add new sites without renegotiating your entire contract?

Frequently Asked Questions

Is NBN reliable enough for business use?

NBN can be reliable for business use, but it depends heavily on the RSP (Retail Service Provider) you choose and the NBN technology type at your premises. Business-grade NBN plans from reputable RSPs include traffic prioritisation and improved SLAs compared to residential plans. However, for mission-critical operations, NBN should ideally be paired with a backup connection on a different network.

How much does Enterprise Ethernet cost in Australia?

Enterprise Ethernet pricing in Australia varies based on speed, location, and contract term. Typical monthly costs range from $500 for a 100 Mbps symmetric service to $3,000+ for 1 Gbps symmetric in CBD locations. Regional and non-metro locations may incur additional build costs. The key advantage over NBN is the dedicated bandwidth and enterprise-grade SLA.

Can SD-WAN replace MPLS for multi-site businesses?

Yes. SD-WAN has largely replaced MPLS for the majority of Australian multi-site businesses. SD-WAN delivers comparable or better performance at 40-60% lower cost, with the added benefits of application-aware routing, integrated security, and multi-carrier redundancy. The only scenarios where MPLS may still be preferred are ultra-low-latency requirements (sub-1ms) or regulatory mandates for dedicated circuits.

Is 5G fast enough to replace fibre for business?

5G Fixed Wireless can deliver comparable download speeds to fibre in areas with strong coverage, but it has limitations. Upload speeds are typically lower, latency is higher, and performance can vary during peak congestion periods. For most businesses, 5G is best positioned as a backup connection or primary link for smaller offices, rather than a wholesale replacement for fibre at a major site.

How long does it take to get Enterprise Ethernet installed?

Enterprise Ethernet installation in Australia typically takes 60-90 business days from order to activation. This includes the fibre build (if required), carrier provisioning, and on-site installation. In buildings that already have existing fibre infrastructure, provisioning can be significantly faster — sometimes as quick as 20-30 business days.