Optus SIM-plan discounts are cutting AU$15 off monthly pricing while stacking 50GB bonus data onto Choice Plus postpaid plans, with the Small Plan dropping to AU$40 per month for the first 12 months. This is a limited-time online-exclusive promotion that expires soon, making it one of the more aggressive pushes from Australia’s second-largest telco during the EOFY sales period.
Key Takeaways
- Optus Choice Plus Small Plan: AU$40/month (first 12 months) with code YES20, normally AU$55, includes 100GB total data
- Optus Choice Plus Medium Plan: AU$52/month (first 12 months), normally AU$65, includes 250GB total data
- All Choice Plus plans include unlimited national calls/texts, 5G access, no excess data charges, and 10% off SubHub subscriptions
- No lock-in contract required; month-to-month postpaid SIM-only plans on Optus 4G/5G network
- Promotion is online-exclusive and described as expiring very soon
Optus SIM-plan discounts: What You Get
The Optus SIM-plan discounts apply to Choice Plus plans, which are month-to-month postpaid offerings with no contract lock-in. The Small Plan normally costs AU$55 monthly for 50GB of data, but the promotion cuts it to AU$40 for the first 12 months when you use code YES20—a straight AU$15 saving, or 20% off. On top of that, Optus adds 50GB bonus data for the first year, bringing your total monthly allowance to 100GB.
The Medium Plan follows the same structure: normally AU$65 per month for 200GB, it drops to AU$52 (AU$13 off) with the promo code and gains 50GB bonus data, totaling 250GB monthly. Both plans include unlimited national calls and texts, full 5G network access, no excess data charges, and a 10% discount on SubHub subscriptions. Medium Plan and higher tiers unlock unlimited international talk and text to 35 destinations.
After 12 months, pricing reverts to the standard rates—AU$55 for Small, AU$65 for Medium—but you keep the base data allowance and all standard inclusions. Optus also supports data banking up to 200GB across plans, so unused data can roll over, and eSIM is available for those who prefer a digital SIM.
How Optus SIM-plan discounts stack against rivals
Optus is not alone in pushing aggressive EOFY deals. Aussie Broadband, which operates on the Optus network, is running 50% discounts for six months on comparable plans—40GB for AU$17.50 (then AU$35) or up to 220GB for AU$35 (then AU$70). That undercuts Optus on raw price-per-gigabyte during the promotional period, though Aussie Broadband lacks the 5G priority and SubHub benefits Optus Choice Plus includes.
Vodafone’s competing SIM-only offer is AU$49 per month for the first 12 months (normally AU$59) with 360GB of data. That sounds like more data for less money, but Vodafone’s network coverage and 5G rollout lag behind Optus in many regional areas. Telstra, Australia’s largest telco, prices similar plans AU$13 or more above Optus during this promotion, making it a harder sell unless you prioritize Telstra’s network reliability in remote locations.
For budget-conscious users, Optus Flex Plus prepaid is worth considering: AU$39 per month with 25GB base data plus 40GB bonus for the first three recharges. It lacks the contract flexibility of postpaid but suits those who want to avoid ongoing commitments entirely.
Why timing matters for Optus SIM-plan discounts
The original article emphasizes that this promotion expires very soon, which is typical EOFY urgency messaging[Summary]. However, the discount is substantial enough to justify acting quickly if you are considering switching to Optus or upgrading your current plan. A 20% saving on the first 12 months, combined with 50GB bonus data, effectively gives you an extra month of service at no cost when you do the math on the Small Plan.
One catch: the promo code YES20 is required to unlock the discount, and it is online-exclusive. You cannot walk into a retail store and claim this deal—it is SIM-only via Optus’s website. If you are already on an Optus postpaid plan, check whether you can port to Choice Plus mid-contract without penalty, as the promotion applies to new activations and existing customer switches.
Is Optus SIM-plan discounts worth switching for?
If you are on Telstra or Vodafone and paying AU$60+ monthly, switching to Optus Choice Plus Small at AU$40 for a year is a no-brainer—you save AU$240 to AU$300 annually while gaining 100GB instead of 50GB. If you are already on Optus Flex prepaid or a smaller MVNO, the postpaid Choice Plus plans offer superior perks (5G priority, SubHub discounts, international calling on Medium+) but cost more per month once the promotional year ends.
The Medium Plan at AU$52 makes sense if you regularly use more than 100GB monthly and value the international calling feature. After 12 months, you will pay AU$65—still competitive against Vodafone’s AU$59 for 360GB, but Optus’s 250GB base is more realistic for average users.
Can you stack Optus SIM-plan discounts with other offers?
The research brief does not specify whether code YES20 can be combined with other promotions or cashback offers from third-party retailers. Check Optus’s terms carefully, as stacking is rarely permitted on primary discounts. Additionally, all Choice Plus plans include 10% off SubHub subscriptions and AU$15 monthly off Optus Sport, so factor those savings into your total cost of ownership.
What happens after the 12-month promotional period ends?
Once your 12-month discount period expires, your monthly bill rises to the standard rate: AU$55 for Small, AU$65 for Medium. The bonus 50GB data also disappears, reverting you to the base 50GB (Small) or 200GB (Medium). You are not locked into a contract, so you can switch providers if Optus’s standard pricing no longer suits your budget. However, if you stay, you retain all other benefits—5G access, no excess charges, SubHub discount—so the core value proposition remains solid.
Optus SIM-plan discounts represent a genuine competitive move during EOFY, not a gimmick. The AU$15 saving plus 50GB bonus effectively doubles your data on the Small Plan and cuts your annual bill by AU$180 if you stick with the plan for a full year. The catch is the expiry urgency and the requirement to use a promo code online. If you have been considering a switch or an upgrade, this window is worth acting on—but do the math on your own usage to ensure the data allowance matches your needs before committing.
This article was written with AI assistance and editorially reviewed.
Source: Tom's Guide
