Cheapest gas plans in South Australia
Quick answer
Gas retailers in South Australia are listed below. Which plan costs least at your address depends on your usage, household size and appliances, so compare current offers before switching.
Compare gas providers in South Australia and see estimated annual bills based on typical household usage. Finding a cheaper gas plan can make a meaningful difference to your household budget.
Compare plans available in South Australia.
Compare plansCheapest gas plan by retailer, AGN Metro/Barossa/Peterborough
| Retailer | Plan | Conditions | Step rates | Daily supply | Est. annual bill | Conditional discounts |
|---|---|---|---|---|---|---|
| Alinta | HomeDeal Smart - Gas | 5.35c/MJ for the first 49.32 MJ/day, then 3.64c/MJ | 69.66c/day | $1,120 | None | |
| GloBird | FULLHOUSE Residential | 06-01 to 09-30: 5.50c/MJ for the first 50 MJ/day, then 2.45c/MJ; 10-01 to 05-31: 5.50c/MJ for the first 50 MJ/day, then 2.45c/MJ | 85.80c/day | $1,151 | $100 Online Signup Bonus | |
| AGL | Residential Smart Saver (No Exit Fee) New To AGL | 5.41c/MJ for the first 109.59 MJ/day, then 3.03c/MJ | 96.31c/day | $1,227 | None | |
| Lumo Energy | Lumo Basic | 5.94c/MJ for the first 49.3 MJ/day, then 2.64c/MJ | 77.00c/day | $1,243 | None | |
| COVAU | Freedom Residential Gas | 5.79c/MJ for the first 27.4 MJ/day, then 5.79c/MJ for the next 21.9 MJ/day, then 3.25c/MJ | 90.33c/day | $1,267 | Guaranteed Discount on total usages | |
| Origin | Go Variable Ongoing | 6.32c/MJ for the first 49.32 MJ/day, then 3.43c/MJ | 95.54c/day | $1,372 | None | |
| Red Energy | Living Energy Saver | 6.88c/MJ for the first 49.3 MJ/day, then 3.09c/MJ | 100.10c/day | $1,479 | None | |
| EnergyAustralia | Flexi Plan | 8.33c/MJ for the first 27.4 MJ/day, then 4.76c/MJ for the next 21.9 MJ/day, then 3.80c/MJ | 118.80c/day | $1,562 | Guaranteed discount | |
| ENGIE | Home Business Movers Gas | Moving house only | 9.59c/MJ for the first 27 MJ/day, then 5.94c/MJ for the next 22 MJ/day, then 3.71c/MJ | 81.58c/day | $1,620 | 3% Guaranteed Discount |
Estimated at 16,199 MJ a year, the average SA household gas use (AER benchmark, 2020). Prices from retailers' published plans, checked 26 Oct. Usage and supply are shown with 10% GST added. Conditional discounts are listed and are not included in the annual bill.
Gas retailers in South Australia
This analysis is based on EnergyPlans Australia's 2026 energy pricing data across multiple providers and states.
Gas market in South Australia
South Australia has a competitive gas retail market. Gas prices in SA are among the higher of the eastern states, making comparison particularly valuable.
There is no single regulated reference price for gas in SA. The AER monitors the market, and consumers are encouraged to compare plans regularly.
How to compare gas plans in South Australia
- 1
Check your current rate
Find your current usage rate (c/MJ) and daily supply charge on your gas bill. This is your starting benchmark for comparison.
- 2
Enter your postcode
Use our comparison tool and enter your South Australia postcode to see gas plans available in your area.
- 3
Compare estimated annual costs
Look at the estimated annual bill, not just the headline rate. Daily supply charges and usage tier structures all affect your total cost.
- 4
Check contract terms
Some plans have no exit fees; others lock you in. Read the plan terms carefully before signing up.
- 5
Switch online
Most retailers allow you to switch online. Your new retailer arranges the change and your gas supply is not interrupted.
Why do gas prices differ across South Australia?
Gas prices in South Australia vary for several reasons:
- Distribution network: Your local gas network's charges vary by region within SA. Areas with older infrastructure or lower density may have higher network costs.
- Retailer margin: Each retailer adds its own margin to wholesale gas costs and network charges. Smaller retailers often offer sharper pricing to attract new customers.
- Plan type: Fixed-rate plans lock in your rate for a set period, while variable plans can change. Fixed plans offer price certainty; variable plans may start lower but can increase.
- Seasonal usage: Gas usage in South Australia is typically higher in winter due to heating. Households on tariffs with usage tiers may face higher marginal rates when usage increases.
- Bundle discounts: Taking both electricity and gas through the same retailer can attract a discount. Always compare bundled and separate plans to verify the bundled option is the better deal.
More gas resources for South Australia
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Compare plans available in South Australia.
Compare plansFrequently asked questions
What is the cheapest gas plan in South Australia?
The lowest generally available gas plan on this page is $1,120 a year, estimated at 16,199 MJ, the average SA household gas use in the AER 2020 benchmark. Which plan costs least at your address still depends on your network and usage.
What is the average annual gas bill in South Australia?
The bills on this page are estimated at 16,199 MJ a year, the average SA household gas use (AER benchmark, 2020). At that usage the lowest generally available plan shown is $1,120 a year. That is a plan price, not an average household bill.
How do I find a competitive gas plan in South Australia?
Use our comparison tool to enter your postcode and see current gas plans in your area. Compare the usage rate (c/MJ) and daily supply charge to determine the true annual cost for your usage level.
Does switching save money on gas in South Australia?
Many households in South Australia remain on standing offer rates, which are generally higher than the most competitive market rates available. Reviewing your plan and comparing alternatives is worthwhile if you have not done so recently.
Is there a reference price for gas in South Australia?
Gas in South Australia does not have the same regulated reference price system as electricity. Compare market offers directly. Look at the usage rate per MJ and the daily supply charge to determine the true annual cost.
Annual bills use the AER 2020 household gas benchmark and include 10% GST. Conditional discounts are listed and not applied.
How we calculate these estimates
The figures below reflect state-level benchmark data from distributor zones across this state.
Estimated costs can vary by usage, tariff type, retailer, distributor, and address. Both supply charges (the daily fixed cost of being connected) and usage rates (c/kWh) affect your total bill. Solar feed-in tariffs vary by retailer and plan. Always review plan details, fees, and conditions before switching.
Data sources
- Retailer CDR gas plans
- AER residential gas consumption benchmark, 2020
These are indicative estimates only. Your actual bill depends on your specific plan, usage patterns, and applicable discounts. Read our full methodology.
Methodology last reviewed: 2026-10-25.
How we make money
EnergyPlans.com.au may receive a commission if you switch through our comparison partner. This does not change the price you pay, but it may influence which plans are available through our service. We do not compare every plan in the market.
Our editorial content, methodology, and benchmark data are independent of any commercial relationship. Always review plan details, including any fees or conditions, before switching. How we make money.
Data shown for South Australia gas.