Cheapest gas plans in South Australia
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 $1,480.
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Reference bill assumptions
Estimated annual bills below are calculated for a typical South Australian 3-bedroom household with gas heating using approximately 8,030 MJ per year (22 MJ/day). Individual bills vary based on actual usage, household size, appliances, and plan terms.
Gas providers in South Australia — estimated annual bills
| Provider | Avg rate (c/MJ) | Supply charge ($/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.
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 for households with gas heating.
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.
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Frequently asked questions
What is the cheapest gas plan in South Australia?
The cheapest gas plan in South Australia varies by postcode and usage. Simply Energy is currently among the most competitive options based on average usage rates. Always compare plans for your specific address.
What is the average annual gas bill in South Australia?
The average annual gas bill in South Australia is approximately $1,480. This varies significantly depending on household size, whether you have gas heating, and the plan you are on.
How do I find the cheapest gas in South Australia?
Use our comparison tool to enter your postcode and see current gas plans in your area. Smaller retailers often offer lower rates than the major providers — compare the usage rate (c/MJ) and daily supply charge for the most accurate cost estimate.
Does switching save money on gas in South Australia?
Yes. Many households in South Australia are on standing offer rates, which are significantly more expensive than market offers. Switching to a competitive market plan can save $100–$300 per year depending on your usage.
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. However, you can still compare market offers directly — look at the usage rate per MJ and the daily supply charge to determine the true annual cost.
Last updated: 8 March 2026. Rates are indicative estimates based on published plan data.