Gas Plans for Low Usage: Compare the Whole Annual Cost

Gas plans for low usage can look cheap in the wrong place. A tiny usage rate is attractive, but a cooking-only household may pay more to keep the connection available than to buy the gas it burns. Start with the daily supply charge, then add realistic consumption before deciding which offer is cheaper.

Quick answer

Gas plans for low usage often depend more on the daily supply charge than on a small difference in the usage rate. Compare a full year of fixed charges plus your actual MJ consumption. A lower supply charge can win for light users even when its usage rate is higher.

Gas plans for low usage: define your household first

Low usage is a description of a consumption pattern, not a reliable marketing category. A single person with gas space heating may use more than a larger household with an induction cooktop and only occasional gas hot-water demand. Count the appliances and examine actual MJ consumption.

Use a year of bills where possible. Gas heating can make winter usage much higher than summer usage, so one quiet quarter can be misleading. If you recently removed an appliance, mark the date and build a forecast from the new setup rather than assuming the old annual total still applies.

Check whether your bills are based on actual or estimated readings. A later adjustment can make one period look unusually high or low. For the tariff decision, the most useful number is a reasonable estimate of total consumption over the period you expect to remain on the plan.

Separate the fixed cost from the variable cost

The daily supply charge is payable for maintaining the retail gas service under the contract. The usage charge depends on consumption. AGL’s plan explanation identifies these as separate gas bill components. Other retailers’ offers should be read on the same basis.

At an invented supply charge of $1 a day, the fixed annual amount is $365 before any gas is used. If a household consumes 2,000 MJ at an invented rate of 4 cents per MJ, usage adds $80. The total is $445, and the supply component accounts for most of it.

That does not mean supply charges are optional or that the retailer is billing incorrectly. It means a low-consumption comparison needs to give the fixed component the weight it actually has. Our supply charge versus usage charge guide explains the bill terminology; this guide applies it to choosing a plan.

A simple annual comparison

The two offers below are invented, have flat usage rates and exclude fees, concessions and incentives. They are not available plans or market averages. They show why the same pair of tariffs can produce different winners for different households.

Offer A has a lower supply charge but a higher usage rate. It wins at the two lower consumption levels. Offer B wins at 10,000 MJ because the usage saving has become large enough to recover its extra fixed cost.

Real offers may have daily or seasonal blocks, so use the retailer’s definitions. Do not apply the cheapest advertised block to every unit consumed. A government or retailer estimate based on your history can help, but check that every offer uses the same consumption assumptions.

Find the point where the result changes

For these simplified offers, B costs an extra 30 cents a day in supply, or $109.50 a year. It saves 1.5 cents per MJ. Dividing $109.50 by $0.015 gives a crossover of 7,300 MJ a year. Below that, A is cheaper; above it, B is cheaper, under the stated assumptions.

This calculation is useful when your usage may change. If you expect to replace a gas heater with an electric system, you can see whether the remaining consumption might fall below the crossover. If someone moves in and hot-water use rises, test the opposite direction.

Do not treat the crossover as a permanent fact about the brands. It belongs to those specific prices, fees and assumptions. A rate change, different block structure or expiring incentive moves the point. Save the date and source of the quotes alongside the result.

Cooking-only homes: check the full year

A cooking-only connection can have low variable consumption while attracting supply charges every day. If you travel for a month, the usage may fall but the ordinary daily charge may continue. A cost-per-MJ figure calculated by dividing the whole bill by very low usage can therefore look surprisingly high.

For plan selection, use the annual total rather than that blended figure. The blended figure includes fixed charges and does not tell you the marginal cost of boiling another saucepan. Keeping those ideas separate makes the bill easier to understand and prevents exaggerated appliance-cost claims.

If the home is rented, you may not control the appliance choice. A suitable retail plan can still help, but replacing or removing fixed appliances generally requires the owner’s involvement and qualified installation work. Do not assume a renter can simply cancel gas without affecting hot water or another essential service.

Concessions, credits and discount conditions

Check any concession eligibility directly and make sure the account details are correct. Do not assume a benefit applies just because a comparison result includes an estimate. The rules and application process depend on the jurisdiction and your circumstances.

A usage-only discount can have limited dollar value when usage is small. In an invented example, 10% off $80 of annual usage saves $8, not 10% of a $445 whole bill. If the daily charge is higher on that offer, the discount may not compensate for it.

Joining credits can still be valuable, but record their conditions and the recurring cost without them. If a credit requires remaining connected for a specified time, check whether you expect to keep the account that long. Treat reward points as a separate benefit unless you have a realistic value for how you will use them.

Should you keep the gas connection at all?

Once only one small appliance remains, it is reasonable to compare keeping gas with an all-electric setup. That is not the same as choosing a gas retailer. Include the replacement appliance, installation, any electrical upgrade, gas work and account or network closure costs.

Ask the retailer and distributor what ending supply involves. Closing a retail account, disconnecting supply and permanently abolishing a service can be different actions with different costs. Obtain written quotes for the intended outcome rather than assuming that cancelling direct debit removes the connection.

Also consider whether equipment is due for replacement anyway. Comparing a planned end-of-life replacement differs from discarding a working appliance purely to save supply charges. Use the gas cost calculator for the current fuel component, then obtain suitable electrical and installation estimates for the alternative.

Avoid seasonal disconnection assumptions

Turning gas off for a quiet season may sound like an easy way to avoid fixed charges. In practice, service fees, reconnection requirements and timing can undermine the saving. There may also be other gas appliances you still need, particularly hot water.

Ask the retailer to quote the full cycle of ending and restoring service, including any work or safety checks. Compare that total with the supply charges you would actually avoid. Do not operate valves, bypass locks or attempt gas work yourself to create a temporary arrangement.

If the property is empty, clarify responsibility for the account with the owner or agent. An unoccupied property and a permanently decommissioned gas service are not automatically the same thing. Keep a written record of dates and instructions.

Build a shortlist that reflects real life

Compare available offers for the exact address through CompareUs gas and relevant official comparison tools. Enter actual consumption rather than accepting a household-size estimate when better data is available. Check the offer document’s supply rate, usage blocks, payment conditions and fees.

Then test three scenarios: your expected consumption, a lower-use year and a higher-use year. If the same offer wins comfortably in all three, the choice is less sensitive to forecasting errors. If the winner changes near your expected use, focus on which scenario is most realistic and whether the price difference is worth any inconvenient conditions.

Keep electricity separate unless a verified bundle benefit changes the combined total. A low-usage gas customer should not accept a more expensive electricity plan merely to obtain a small gas discount. Compare the two-fuel total with separate retailer choices.

After you switch

Use our gas switching checklist to distinguish a retailer transfer from a disconnection. On the first complete bill, check the accepted supply rate, block prices and any promised credit. A short opening bill may not be comparable with a full previous quarter.

Set a reminder for the end of any benefit period and revisit the estimate after a material appliance change. The best low-usage plan is not a permanent label attached to one retailer. It is the available offer that fits the household’s current consumption and conditions.

Sources and review

The CompareUs Editorial Team checked AGL’s charge explanation, Energy Made Easy’s switching checklist and Energy Made Easy on 27 September 2026. All numerical offers are hypothetical and use simple flat rates to demonstrate the method. No claim is made that these are current market prices.