1300 vs 1800 Numbers: Which Is Right for Your Business?
The real difference between 1300 and 1800 numbers, who pays for calls, and which one suits your business.
If you're setting up a national-looking phone presence for your business, you've probably hit the same fork in the road that most Australian businesses do: should you get a 1300 number or an 1800 number? They look almost identical, they both give you a professional, location-independent line, and they both route calls wherever you want. But the difference comes down to one simple thing: who pays for the call. This guide walks through both honestly, so you can pick the one that actually fits how your customers reach you.
The core difference: who pays
The mechanics are straightforward once you strip away the jargon.
- 1300 numbers split the cost. The caller pays the price of a local call (or a flat mobile rate from their phone plan), and your business covers the rest. They're often called "local rate" numbers.
- 1800 numbers are free to the caller from landlines and mobiles. Your business picks up the entire cost of the call.
That single distinction drives almost every decision below. Everything else — call reporting, routing, IVR menus — works the same way on both.
When a 1300 number makes sense
A 1300 number is the common choice for everyday business lines: sales enquiries, bookings, general reception, support queues. Because the caller chips in for the call, your inbound costs stay more predictable, which matters if you expect steady or high call volumes.
It's a sensible fit when:
- You want a single national number that doesn't tie you to one city's area code.
- Most of your callers are existing or motivated customers who won't be put off by a small call cost.
- You're keeping an eye on inbound spend and want to share it with the caller.
When an 1800 number makes sense
An 1800 number removes any hesitation for the person dialling, because it costs them nothing. That's powerful when you're actively encouraging people to call.
It tends to suit:
- Customer service and complaints lines, where you don't want cost to discourage a call.
- Marketing campaigns, charities, and lead-generation, where "free call" is part of the pitch.
- Businesses targeting customers who may be price-sensitive about phoning you.
The trade-off is simple: every call lands on your bill, so volume directly affects cost. Many businesses run both — a 1300 for general lines and an 1800 for a specific campaign or support function.
What's the same on both
Whichever you choose, the smart features are identical. With SIP Connect's 1300 and 1800 numbers, you get call reporting to see where calls come from and how they're handled, multi-branch routing to send calls to the right site, IVR menus ("press 1 for sales"), and call splaying to spread calls across your team. These numbers aren't tied to a physical line, so they ride happily on a modern business VoIP setup.
How your inbound number fits your phone system
A 1300 or 1800 number is only the front door — what happens after the call connects depends on your phone system. If you're on ageing on-premise hardware, this is a good moment to think ahead. Australia's copper PSTN network is being retired premises-by-premises as the NBN rolls out, and some legacy products (like Telstra's DOT service) are ending too. Pairing your inbound numbers with a current platform such as the 3CX phone system, a hosted PBX, or Microsoft Teams Direct Routing means your routing, IVR and reporting all work together rather than being bolted onto a system that's on its way out.
SIP Connect is vendor-neutral about this — we'll recommend the platform that genuinely fits your team and call patterns, not push one tied product. You can see the full range on our business phone systems page.
A quick way to decide
If you want one rule of thumb: choose 1300 when you want a national number and are happy for callers to share the small cost; choose 1800 when removing every barrier to calling is worth absorbing the full call cost. And remember you don't have to pick just one.
Frequently asked questions
Can I keep my existing 1300 or 1800 number if I switch providers?
In most cases, yes. These numbers can usually be ported between providers, so you can move to SIP Connect and keep the number your customers already know. Our local team can check your specific number and walk you through it.
Do I need a special phone system to use a 1300 or 1800 number?
No. They route to whatever you've got — a VoIP setup, a hosted PBX, 3CX or Teams. The number simply directs calls to your chosen destination, including across multiple branches.
Which is cheaper to run, 1300 or 1800?
It depends on your call volume. With a 1300 the caller shares the cost, so your inbound spend is generally lower; with an 1800 you cover every call. The right answer comes down to how many calls you expect and how much you want to encourage people to dial. A quick look at your current bill usually makes it obvious.
Not sure which way to go?
If you'd like a straight answer for your business, the local SIP Connect team in Greensborough is happy to help — real humans, no offshore call centre, no robots. We'll take a look at how your customers call you and even run a free bill analysis to see what you're paying now. Have a chat with us via the contact page or call 1300 747 266. Real Connections. Real Easy.
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