Cheapest gas plans in South Australia
Based on average annual bill estimates, gas plans in South Australia start from around $1,250/year for a typical household. Comparing providers may save households up to $90 annually.
Estimates assume typical household usage. Actual bills vary by usage, location, and plan.
Compare gas providers in South Australia and see estimated annual bills based on typical household usage. Switching to a cheaper gas plan can save hundreds of dollars per year. Average gas rates in SA are currently around 3.05c/MJ with a typical annual bill of $1,480.
Find your cheapest gas plan now
Free comparison for South Australia residents.
Reference bill assumptions
Estimated annual bills below are calculated for a typical South Australian 3-bedroom household with gas heating using approximately 8,030 MJ per year (22 MJ/day). Individual bills vary based on actual usage, household size, appliances, and plan terms.
Gas providers in South Australia — estimated annual bills
| Provider | Avg rate (c/MJ) | Supply charge ($/day) | Est. annual bill | Rating |
|---|---|---|---|---|
CheapestSimply Energy | 2.54c | $0.83 | $1,250 | 3.9 |
| 2.61c | $0.86 | $1,290 | 3.7 | |
| 2.68c | $0.88 | $1,320 | 3.8 | |
| 2.72c | $0.90 | $1,340 | 3.9 |
* Estimated annual bills are indicative only, based on reference usage assumptions above. Rates and plans change regularly — compare live plans for current pricing.
This analysis is based on EnergyPlans Australia's 2026 energy pricing data across multiple providers and states.
How much can you save on gas in South Australia?
Based on average annual bill estimates, gas plan prices in South Australia can vary by up to 7% between providers — a difference of approximately $90 per year for a typical household. Switching from a standing offer to a cheaper market plan may save South Australia households an estimated $54–$90 annually.
Savings estimates are indicative. Actual savings depend on your current plan, usage, and the plans available in your area.
Compare energy plans & see pricesGas 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 in minutes. 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
Popular energy comparisons
Find cheaper energy plans today
Compare all gas retailers in South Australia. Free, independent comparison — no signup required.
100% free service. No markup on prices.
Frequently asked questions
What is the cheapest gas plan in South Australia?
Based on our current dataset, Simply Energy is among the more competitively rated options for average usage rates in South Australia. Gas plan rates change over time — use our comparison tool to see the latest available offers for your postcode.
What is the average annual gas bill in South Australia?
The average annual gas bill in South Australia is approximately $1,480. This varies based on household size, whether you have gas heating, and the plan you are on.
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.
Last updated: 1 April 2026. Rates are indicative estimates based on published plan data.