How does a prepaid plan work?
A prepaid plan works by paying for your service in advance, allowing you to choose exactly how much you want to spend on calls, texts, and data. You are not tied to the provider, and because there are no lock-in contracts, you can leave the service whenever you wish.
Prepaid plans for mobile phones are the most common, but there are also plans suitable for data-only devices like tablets, security cameras, or pocket Wi-Fi. With some providers, you can also choose between a prepaid plan and a postpaid plan (contract) when purchasing mobile broadband.
You can order a prepaid plan directly from the provider’s website, but many providers also sell their prepaid SIM kits in physical stores, including supermarkets (like Woolworths and Coles), service stations, post offices, and retailers like 7-Eleven or Officeworks. If you buy in-store, you may pay a small fee for the SIM card kit.
To start using it, you will need to activate the SIM. Please note that in Australia, you are required by law to provide valid ID (such as a Driver’s Licence, Passport, or Medicare Card) when activating a prepaid service.
When you buy a prepaid plan online, the SIM card itself is sometimes included for free. However, check with your provider just to be sure.
You need to recharge your account
To make calls, send texts, and use data, you need to recharge your account. Most prepaid plans work by paying a fixed amount for a set period (usually 28 or 30 days) which gives you unlimited standard calls and texts plus a set amount of data. There are also “Pay As You Go” (PAYG) plans where credit is deducted per minute, text, or MB of data from your balance, but these are less common today.
Once you have ordered and activated your SIM, you are connected to the network and ready to go.
How to choose the best prepaid plan
Choose a provider with good network coverage
To use your phone or device effectively, the provider must have reliable network coverage in the areas where you live, work, and travel. On most providers’ websites, you can enter your postcode to check their coverage map before you sign up.
Decide on the plan features you need
The range of prepaid options varies between providers. Start by considering what features are most important to you. If your data usage changes from month to month, look for a provider that offers data banking (rolling over unused data) or flexible recharge options. You should also decide if you want a short-term plan (e.g., 28 days) or a “long expiry” plan (e.g., 6 or 12 months), which is great for low usage.
Decide if you need to use the plan overseas
If you travel frequently, check the provider’s international roaming rates. Unlike domestic usage, using your Australian prepaid plan overseas usually incurs extra costs. Some providers offer international roaming packs to make this cheaper, while others charge high pay as you go rates. Always check these terms before leaving Australia.
Compare value for money
Today, most prepaid plans offer unlimited standard national calls and texts. Therefore, the main difference often comes down to the data allowance and the price. Make sure to choose a data allowance that works for you. It’s unnecessary to choose a plan with a high amount of data if you won’t use it anyway.
Prices are often lower with smaller providers (MVNOs), who use the major networks (Telstra, Optus, or Vodafone). This can be a great way to save money while keeping good coverage, but check if they offer the customer support or international features you require.
Which prepaid plan is the cheapest?
ALDI Mobile 365 Days is the cheapest prepaid plan right now (checked on 21/10/26). Recharge from $2.00.
How to recharge your prepaid plan
There are various ways to add credit or renew your plan. The easiest way is via the provider’s website or mobile app. Many providers allow you to set up “Auto-Recharge” so you never run out of credit. You can also usually recharge by purchasing a voucher at a supermarket or service station.
How do I check my balance?
You can usually check your data and credit balance by logging into your account on the provider’s website or via their app. Most providers also have a specific number you can text or call to receive an instant balance update.
Do prepaid plans expire?
Yes. There are two types of expiry to be aware of:
- Credit expiry: The inclusions in your plan (data, calls) expire after a set period (e.g., 28 days, 30 days, or 365 days). If you don’t use them, you lose them (unless your plan has data rollover).
- SIM expiry: If you do not recharge your service for a long period (often 6 months), your SIM card will be deactivated, and you will lose your mobile number. Check the specific “service life” terms with your provider.
Can you switch from a prepaid plan to a postpaid plan?
Yes. If your provider offers both prepaid and postpaid (contract) options, switching is usually simple. You can typically do this online or via the app, though sometimes you may need to call customer support.
- The SIM: You might need a new SIM card, but often you can keep the same one.
- The number: You can almost always keep your existing mobile number (this is called porting).
- The balance: Be careful – unused prepaid credit is usually forfeited (lost) when you switch to a postpaid plan. Check this with your provider before switching.
Can you use a prepaid plan abroad?
Yes, many prepaid plans work abroad, but international roaming is not automatically switched on for all prepaid services. You may need to activate it via your account settings.
Important: International roaming on Australian prepaid plans can be expensive.
- Roaming Packs: Some providers let you buy a specific “add-on” for travel (e.g., $5 for a day of use).
- Pay As You Go: Without a pack, you might be charged high rates for every megabyte of data or minute of talk. Always review the “International Roaming” charges on your provider’s website before you travel to avoid unexpected costs.
Frequently asked questions about prepaid plans
It really comes down to your budget and how you use your phone. A 365 day prepaid plan is often the best choice for “set and forget” convenience and typically offers a lower cost per gigabyte of data. You pay one upfront fee for the whole year, which often works out cheaper than 12 individual monthly recharges. However, a month-to-month plan offers more flexibility if you want to switch providers frequently or if you don’t want to shell out a large lump sum all at once.
Yes, in Australia, mobile number portability is a standard right. When you buy a new prepaid SIM (or an eSIM for instant activation), simply select the option to “port” or “transfer” your existing mobile number during the activation process. It usually takes anywhere from a few minutes to a few hours, and your old service will stay active until the switch is complete.
Data banking (or data rollover) allows you to keep any unused data and move it into a “data vault” for future use. Many Australian prepaid plans now offer this as a standard feature. Just keep in mind that with most plans, you need to recharge before your current credit expires (whether that’s every 28, 30, or 365 days) to keep your “banked” data from disappearing.
This is a common quirk in the Australian mobile market. Many providers use a 28-day cycle rather than a calendar month. While it might seem like a small difference, it actually means you’ll end up recharging 13 times a year instead of 12. If you prefer a consistent date every month, look for “calendar month” plans or consider a 365-day plan to avoid the “28-day” math altogether.
Yes, 5G is now widely available on prepaid SIM cards across Australia. While some budget-tier plans are still limited to 4G, most now offer 5G as standard but with speed caps (such as 150 Mbps or 250 Mbps) to distinguish between budget and premium tiers. Always check the Critical Information Summary for speed caps to ensure you’re getting the best performance for your mobile needs, especially if you do a lot of high-definition streaming.
