Gas for Commercial Kitchens and Small Manufacturers: What Heavy Users Should Actually Check

There is plenty written about household gas bills, and almost nothing for the businesses that actually burn the stuff: cafes, restaurants, bakeries, laundromats, small fabricators and food manufacturers. If your premises runs cooktops, ovens, fryers, boilers or dryers for long hours, your gas bill behaves differently from a household's, and the standard advice (most of it written for households) will point you at the wrong parts of your plan.

This is the piece for the heavy user at small-business scale, anywhere in NSW, Victoria, Queensland, South Australia, Tasmania or the ACT. No appliance advocacy, no invented figures, just the structure of the thing and what to check. If you have not read the general business gas orientation yet, that covers the bill's anatomy and the small-customer threshold.

Why your bill reads backwards compared to a household's

Small business gas plans typically charge usage in stepped blocks: the first block of megajoules in a billing period at one rate, the next block at another, and so on. A low-usage household barely gets past the first block, so for them the headline first-block rate is a reasonable proxy for the whole plan.

Your kitchen or workshop is the opposite case. Appliance load running long hours drives your usage deep into the later blocks every period, which means the later blocks' rates are doing most of the work on your bill, and the headline first-block rate covers only a sliver of your total. Two plans can present very similar headline rates and price your volume quite differently once the later blocks apply. Reading a plan by its first block is exactly the right habit for a low-usage household and exactly the wrong one for you. This inversion is the single most useful thing to know about business gas at your scale.

For many heavy-use premises, winter stacks space heating on top of the process load. The fryers and boilers do not care about the weather, but the building does, so the winter periods push even deeper into the blocks, at exactly the time some tariffs also switch to seasonal winter rates.

And because so much equipment sits behind one meter, the fixed daily supply charge that dominates a small site's bill is trivial as a share of yours. For a heavy user, usage rates are nearly everything. A plan with a generous-looking supply charge and unremarkable later blocks is optimised for somebody else. Your electricity bill works on entirely different levers, which is why each fuel needs its own diagnosis.

The practical checks

1. Find which rate block your typical period actually reaches. This takes one recent bill and a minute. Read your total megajoules for the period off the bill, then look at the block boundaries in your plan's rate table. Wherever your total lands, the rates at and near that point are your real price; everything above it is irrelevant and everything in the first block is a rounding error. Do this once for a winter bill and once for a milder one, because the answer often differs. From then on, you can read any competing plan the same way: skip the headline, go straight to the blocks your volume lives in.

2. Work out whether a seasonal tariff helps you or hurts you. Some plans charge different rates in winter and non-winter periods. Whether that structure suits you depends entirely on your load shape. A laundromat or a bakery with a broadly flat load year-round experiences a seasonal tariff as a price change it did nothing to cause. A restaurant with heavy winter trade and heated dining areas is winter-peaked, and the interaction between seasonal rates and its biggest periods can dominate the annual outcome. Neither structure is good or bad in itself; the question is which one prices your particular year better, and the only honest way to answer it is to run a full year of your actual usage through both. One quarter tells you almost nothing.

3. Treat estimated reads as a cash-flow planning item. Gas meters are physically read roughly every two months, and between actual reads your retailer estimates. For a heavy user, the gap between an estimate and reality can be substantial in dollar terms, and it gets corrected in a catch-up bill when the actual read arrives. That catch-up is not an overcharge, it is deferred measurement, but it lands as a real invoice in a real month. Check each bill for whether the read was actual or estimated, and if you have had a run of estimates through your busy season, assume a correction is coming and hold room for it. Businesses budget for stock and wages; a heavy gas user should budget for the read cycle too. Why is my gas bill so high works through how estimates, catch-ups and stepped blocks compound on one another.

4. If you are planning a fit-out, know that you are choosing your fuel exposure for years. Connection decisions and appliance decisions are energy contracts in disguise. The equipment you plumb in during a fit-out determines which fuel your business consumes, at what volume, for the life of that equipment, and switching costs later are measured in trades and downtime, not in a phone call. We are not here to tell you what to install; kitchens have opinions about their equipment and they are entitled to them. We are here to point out that the decision fixes your exposure long after any particular plan or price has come and gone, so it deserves to be made with your projected volumes in front of you, not just the equipment quote. The plan you choose is revisable every year. The connection mostly is not.

The market you are actually choosing from

Here is the part heavy users consistently underestimate: the size of the market pricing your load. As at 30 July 2026 there were 2,430 active gas plans in the public CDR data that Australian retailers are required to publish. Very few businesses have ever compared against more than a handful of them, usually the handful that appeared in whichever funnel they last walked through. For a business whose usage lives deep in the stepped blocks, where small rate differences multiply across serious volume, comparing a sliver of the market is leaving the actual question unanswered.

The regulator side of this is worth knowing too: the Australian Energy Regulator publishes plan information precisely so the market can be compared on published data rather than on marketing. The data exists. What has been missing is anyone applying it to business-scale gas loads properly: full-year usage, real block positions, seasonal shape, multiple periods.

Your bill already contains the answer

Everything needed to do this properly is printed on the bills you already have: your MIRN, your megajoule totals period by period, your read types, your current rates and their blocks. If any of those names are unfamiliar, the line-by-line gas bill guide points at each one. A business bill is a complete description of a load. That is what our engine consumes. Fix Your Bill reads your actual bill, reconstructs your real usage across the year, and prices every retailer in your state against it, block by block and season by season, the whole market rather than a panel. For a heavy user, that is the difference between comparing headlines and comparing your business.