Best long-expiry prepaid mobile plans in Australia: set, forget and save big with the top 180-day and 365-day options
Lock in big savings with one upfront payment
In Australia, long‑expiry prepaid plans offer a simple, predictable way to manage mobile costs by letting you pay upfront for 6 or 12 months. It's the kind of set‑and‑forget experience that will free you from the constant cycle of monthly bills so you can focus on everything else in your life.
They're also cost-effective, often working out cheaper on a per-month basis than equivalent month-to-month options, sometimes offering more data than even the best cheap mobile phone plans.
Australia's three major telcos, Telstra, Optus and Vodafone, all offer long-expiry prepaid plans, though the best value for money can typically be found at smaller telcos, such as Lyca Mobile, Kogan Mobile, Amaysim, Boost Mobile and more.
Long‑expiry plans usually give you a large pool of data upfront and let you manage it at your own pace over the full term. That freedom to control your usage makes them especially appealing to lighter or more unpredictable data users who value having that kind of flexibility.
Alternatively, some long‑term prepaid plans will divide your data into monthly allocations for the sake of convenience, with any unused amount rolling over to the next month. It's a great option for people who like the consistency of a monthly plan but prefer not to deal with the hassle of paying a phone bill every month.
To make things easy for you, we've put together a list of all the top prepaid plans with either 180-day or 365-day expiry periods, starting with some handpicked choices which we think provide the most bang for your buck.
Long-expiry prepaid plans: top picks
If massive data is your goal, Kogan Mobile’s Extra Large 365‑Day Flex Plan is hard to top. For the first year, it’s discounted by AU$101 and boosted with an extra 400GB on top of the standard 500GB. You can take the full 900GB upfront or receive it in 75GB monthly chunks. Your first year comes to AU$199 — effectively AU$16.58 p/m or just AU$0.22 per GB — with renewals priced at AU$300. You'd better act fast, though — this offer expires on May 24, 2026.
Total minimum cost is AU$199 | Total cost per year: AU$199, then AU$300 ongoing
Lyca Mobile Medium Plan | 360GB | AU$150 first year, then AU$240 ongoing | Vodafone 4G/5G Network
Lyca Mobile is offering a great deal for those willing to pay upfront for a whole year of service. The telco's Medium long-term plan gives you a total of 360GB, split into 30GB chunks that are renewed every 30 days for 12 renewals, at a reduced price of AU$150, down from AU$240 — that works out to just AU$12.50 per renewal, making it an awesome bargain. Once the introductory period ends, the price for your next 12 renewals returns to the regular rate. This offer is valid until May 31, 2026. T&Cs apply.
Total minimum cost is AU$150 | Total cost per year: AU$150, then AU$240 ongoing
If you’re after an affordable year-long prepaid option on Telstra’s 5G network, Boost Mobile’s $365 Prepaid plan is worth checking out. New customers score 375GB to use in their first year, which averages about 32.2GB a month. From the second recharge onwards, the allowance is 365GB annually, or roughly 30.4GB per month. T&Cs apply.
Total minimum cost is AU$365 | Total cost per year: AU$365
Long-expiry prepaid plans by price
How we pick the best long-expiry prepaid plans
When comparing long‑expiry mobile plans, our goal is to pinpoint options that deliver the strongest value for money, with particular attention to the dollars‑to‑data ratio — the real measure of how far your recharge actually goes. Because these plans lock you in for several months at a time, getting the right balance upfront matters even more.
The Aussie Tom's Guide team prioritises plans that stretch your budget as far as possible. A good long‑expiry option should provide generous data inclusions at a cost that remains competitive over the full term. Since the average Australian uses roughly 12GB of data per month, we treat that as the baseline when assessing whether a plan’s total data allowance is genuinely practical across its lifespan, whether that be 180 or 365 days.
Unlimited standard calls and texts are now standard across almost all long‑expiry offerings, so any plan that still caps these features is unlikely to represent good value. We also show preference to any long-expiry plan which includes extras, such as rollover data or international minutes.
Coverage also plays a major role in determining overall worth. Depending on the provider, your long‑expiry plan will run on either the Telstra, Optus or Vodafone network. Telstra continues to offer the most extensive 4G and 5G footprint nationwide, with Optus and Vodafone close behind.
By weighing these factors — cost efficiency, data longevity, unlimited national use, and network performance — we focus on long-expiry plans that deliver the strongest overall return for your money.
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Stephen Lambrechts is the Managing Editor of Tom's Guide AU and has written professionally across the categories of tech, film, television and gaming for the last 15 years. Before Tom's Guide, he spent several years as a Senior Journalist at TechRadar, had a brief stint as Editor in Chief at Official Xbox Magazine Australia, and has written for such publications as APC, TechLife Australia, T3, FilmInk, AskMen, Daily Telegraph and IGN. He's an expert when it comes to smartphones, TVs, gaming and streaming. In his spare time, he enjoys watching obscure horror movies on physical media, keeping an eye on the latest retro sneaker releases and listening to vinyl. Occasionally, he also indulges in other non-hipster stuff, like hiking.



