How to Read a Commercial Electricity Bill in Australia

Commercial electricity invoices can be quite confusing. Retailers don't go out of their way to explain them, and some of the charges are buried in language that takes industry experience to decode.

This guide breaks down every line item in plain English.

The two main parts of any electricity bill

Every commercial electricity bill has two distinct components: energy charges and network charges. Most people focus on the energy rate, but for commercial customers, network charges often make up 40–60% of the total bill.

Energy charges

These are the charges from your retailer for the electricity you actually consume.

Usage rate (c/kWh) This is your base electricity rate, cents per kilowatt hour. It's what most people think of when they think about their electricity price. Most commercial customers are on a time-of-use (TOU) tariff, meaning the rate varies depending on when you use electricity, typically higher during peak hours and cheaper off-peak.

Daily supply charge

A fixed charge just for being connected to the grid. It's charged every day regardless of how much electricity you use. This line item is more common for small customers.

Loss factor adjustment

This one surprises most people. A small percentage, usually around 4%, is added to your energy charges to account for electricity lost as heat during transmission and distribution between the generator and your site. It's called a distribution loss factor (DLF) or transmission loss factor (TLF), and every site has one set by the AER. Because retailers buy electricity at the generator and you consume it at the meter, the loss factor bridges that gap. You pay for a slightly larger volume than you actually measure.

Network charges

These are charged by your network distributor (for example in Queensland, that's Energex or Ergon), not your retailer. Your retailer just passes them through.

Fixed daily network charge Similar to the retail supply charge, this is a fixed daily fee for your connection to the network.

Volumetric network charge (c/kWh) A per-unit charge based on how much electricity you consume, separate from your retail usage rate.

Demand charge ($/kW or c/kW/day) This is the one that catches most C&I businesses off guard. A demand charge is based on your peak power draw during a defined window, typically the highest 30-minute period during peak hours (usually 3pm to 9pm on working weekdays). It's charged in dollars per kilowatt, and it can be substantial. The key thing to understand: a demand charge is not about how much electricity you use overall. It's about how much you use at your worst moment. One afternoon where every piece of equipment runs simultaneously can drive your demand charge for the entire month.

Environmental and regulatory charges

LRET / LGC charges The Large-scale Renewable Energy Target (LRET) requires retailers to source a portion of electricity from renewable sources. They pass this cost on as a per-unit charge. You may see it listed as an LGC (Large Generation Certificate) charge.

SRES / STC charges The Small-scale Renewable Energy Scheme supports small solar and hot water systems. Again, retailers recover this cost from commercial customers.

AEMO charges The Australian Energy Market Operator (AEMO) charges a small fee for managing the electricity market. It appears as a line item on unbundled commercial bills.

ESS / PDRS charges (NSW customers) If your site is in NSW, you may see charges related to the Energy Savings Scheme (ESS) or Peak Demand Reduction Scheme (PDRS). These are state-based environmental programs.

Metering charges

If you're on an interval meter (which all large market customers are), you'll see a separate metering charge on your bill. This covers more than just the meter itself. It includes the cost of installation, ongoing maintenance and repairs, meter data services, and the collection and transmission of your interval data to your retailer and AEMO. For large market customers, metering is typically provided by a third party called a Metering Data Provider (MDP), and those costs are passed through on your bill. It is a regulated service but the charges can vary depending on your meter type and provider, so it is worth checking if you have not reviewed it recently.

GST

Added at 10% on top of everything. Worth noting: if you're comparing offers from different retailers, always compare on a GST-exclusive basis. Some quotes include GST, some don't. Mixing the two will give you the wrong answer.

What to look for when reviewing your bill

A few things worth checking every billing period:

• Is your contract expiring soon? Retailers won't always tell you. If your fixed term ends and you don't act, you roll onto a default rate, which is almost always more expensive.

• Are your metering charges above $5 per day? If so, it might be worth having your metering arrangements reviewed.

• Does your electricity invoice include a VAS or addition service line item? If so, it's worth reflecting on whether you are using that additional service (for example, portal access).

• Are you on the right network tariff? Tariff structures change, and businesses are sometimes left on an outdated tariff that no longer suits their usage profile.

• Have your rates changed? Retailers are required to notify you of rate changes, but these notices are easy to miss.
  

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