Key Takeaways
- A 1300 number shares the call cost between your business and the caller. A 1800 number is completely free for the caller — your business pays the full cost.
- 1300 numbers are the more popular choice for most Australian businesses because they balance professionalism with affordability.
- 1800 numbers are best suited for support lines, complaint hotlines, and situations where removing any barrier to calling is critical.
- Both number types offer the same call routing and management features — the difference is purely about who pays for the call.
Choosing between a 1300 and a 1800 number is one of the first decisions businesses face when setting up a national phone presence. They look similar, work similarly, and are managed by the same infrastructure — but the cost model is fundamentally different, and that difference matters more than most businesses realise.
How 1300 Numbers Work
A 1300 number is a shared-cost number. When a customer calls, they pay a small charge — typically the cost of a local call from a landline, or the call is deducted from their mobile plan's included allowance. Your business pays the remainder of the call cost, which depends on how the call is routed and your provider's per-minute rates.
For callers, a 1300 number feels like calling a local business, regardless of where your office is actually located. For the business, it's an affordable way to present a national presence with a single, memorable number.
How 1800 Numbers Work
An 1800 number is a free-call number. The caller pays nothing — your business absorbs the entire cost of the call. This makes it completely free for anyone to call you from any Australian phone, whether landline or mobile.
The "free to call" nature of 1800 numbers removes every financial barrier between a potential customer and your business. That's a powerful advantage in the right context — but it comes at a higher cost to you.
The Key Differences at a Glance
| Feature | 1300 Number | 1800 Number |
|---|---|---|
| Caller cost | Low-cost (local rate or included in plan) | Free |
| Business cost per call | Lower (shared cost) | Higher (full cost) |
| Monthly service fee | Typically $5–$30/month | Typically $10–$40/month |
| Perception | Professional, national | Premium, customer-focused |
| Best for | General enquiries, sales, service | Support lines, complaints, high-trust |
| Number format | 1300 + 6 digits | 1800 + 6 digits |
When a 1300 Number Is the Better Choice
For most Australian businesses, a 1300 number strikes the right balance between professionalism and cost. Here's when it makes the most sense:
You receive a moderate to high volume of calls. Because you share the cost with the caller, your per-call expense is lower. For businesses fielding dozens or hundreds of calls per day, this difference adds up significantly over a month.
Your callers are mostly on mobile plans. Most Australian mobile plans include calls to 1300 numbers in their standard call allowances. This means the majority of your callers won't pay anything extra to reach you — they get the same experience as calling a 1800 number, but your costs stay lower.
You want a national presence without national costs. A 1300 number instantly signals that your business operates beyond a single location. Customers in Perth, Brisbane, and Hobart all dial the same number, and you route those calls to wherever your team is — a single office, multiple locations, or remote workers on a VoIP system.
You're a small or growing business watching costs. The lower per-minute charges on a 1300 number give you room to scale your call volume without your phone bill scaling at the same rate.
When a 1800 Number Is the Better Choice
A 1800 number makes strategic sense in specific scenarios where removing the cost barrier for the caller has a measurable impact:
You run a customer support or complaints line. If a customer is already frustrated, the last thing you want is for them to hesitate about the cost of calling you. A free-call number signals that you value their feedback and want to make it as easy as possible to reach you. This is why most regulated industries — telecommunications, utilities, financial services — use 1800 numbers for their complaint lines.
You serve customers in regional or remote areas. Callers on older landline plans or in areas with limited mobile coverage may not have 1300 calls included in their plan. A 1800 number guarantees they can always reach you for free.
You want to maximise inbound call volume. If your business model depends on converting inbound calls to sales — insurance quotes, legal consultations, emergency services — the small increase in call volume from removing the cost barrier can more than offset the higher per-call charge.
Your brand positioning is premium or customer-first. A 1800 number subtly communicates that your business prioritises accessibility and customer care. For brands where trust and service perception are central, this positioning has value beyond the call itself.
Cost Comparison: A Realistic Scenario
Let's compare the monthly cost for a business receiving 100 calls per month, averaging 3 minutes per call, with calls routed to VoIP:
| Cost Component | 1300 Number | 1800 Number |
|---|---|---|
| Monthly fee | $15 | $25 |
| Call charges (100 × 3 min) | ~$30 (10c/min) | ~$45 (15c/min) |
| Monthly total | ~$45 | ~$70 |
| Annual total | ~$540 | ~$840 |
The difference is roughly $300 per year. For some businesses, that $300 buys meaningful goodwill and additional call volume. For others, it's an unnecessary expense when callers are already reaching them comfortably via a 1300 number.
Can You Have Both?
Yes. Some businesses use both a 1300 and a 1800 number for different purposes:
- 1300 for general enquiries and sales — where call volume is highest and shared cost keeps expenses manageable.
- 1800 for support, complaints, or a dedicated service line — where removing the caller's cost barrier matters most.
This approach gives you the cost efficiency of a 1300 number for your highest-volume line, while still offering a free-call option where it has the greatest impact on customer experience.
What About Mobile Callers?
This is worth addressing directly, because it changes the equation for many businesses. In 2026, the vast majority of calls to 1300 and 1800 numbers come from mobile phones. Most Australian mobile plans now include calls to 1300 numbers in their standard inclusions — meaning the caller pays nothing extra.
This has narrowed the practical difference between 1300 and 1800 numbers for mobile callers. The distinction matters most for landline callers (who may still pay a per-call charge to 1300 numbers) and for the perception your number creates.
One Rate for Both: The Ozetel Advantage
One factor worth highlighting is that not all providers price 1300 and 1800 numbers the same way. Many carriers charge higher monthly fees and per-minute rates for 1800 numbers compared to 1300 numbers — which can make the cost comparison above even more pronounced.
At Ozetel, both 1300 and 1800 numbers come with the same monthly rate and the same inbound call charges. That means the decision between a 1300 and a 1800 number becomes purely about what's right for your customers and your brand — not about paying a premium for one over the other. It removes a significant variable from the equation and makes it easier to choose (or switch between) number types as your business needs evolve.
The Bottom Line
If you're a small to medium business looking for a professional national number at a reasonable cost, a 1300 number is almost certainly the right starting point. It gives you national reach, call routing flexibility, and manageable costs.
If you operate a support line, serve vulnerable customers, or want to remove every possible barrier to inbound calls, an 1800 number is worth the additional investment.
Either way, the number itself is just the starting point — what matters more is how calls are routed, how they're answered, and whether your provider gives you the tools and support to manage them effectively.
Need help choosing? Both come with flexible routing, no lock-in contracts, and Australian support. Contact us and we'll help you work out which option fits your business.
