Electricity Bill Explainer

Billing accuracy, simplicity and timeliness is key for our customers.

Payment options including BPay, Direct Debit, Credit Card, Electronic Funds Transfer (EFT) and Pay In Person at Australia Post can be found here.

How to read your C&I bill

We don’t hide any costs from our customers. To understand your bill better, view our bill explainers for large customers below. With our bill explainer, you can see exactly what you’re paying for.

Page 1 - Account Summary

Opening Balance

This section is a summary of your account balance. It includes your outstanding balance (if there is any), plus any new charges for this bill which adds to your total amount due.

Amount Due

Total of this invoice. Please pay this full amount to the cent to ensure you receive any early payment discount due.

Due Date

To avoid interest being charged please ensure you pay the full amount by the due date.

Invoice Number

This is the number to quote when enquiring about your current bill. This number will change each billing cycle.

Issue Date

The information on your bill is correct as at the issue date. Any payments on or after this date will not appear.

Account Number

This is your unique ERM account number.


A National Metering Identifier (NMI) is a unique, 10-character number used to identify the electricity connection point (meter/s) at your premises. It’s helpful to quote this number when you are making an enquiry.

Invoice Period

This is the date range that this bill covers.

Account Manager

This is the name and number of your Account Manager if you have any questions about your bill.

Summary Graph

The areas in the graph represent the breakdown of each billing periods charges.

Page 2 - Payment Options

Preferred Payment Method

EFT is our preferred method but we also have other options including Direct Debit from a nominated bank account, automated credit card payment and BPAY using phone and internet banking.
Some of the payment options incur processing fees.

Payment Slip

If paying by cheque, you must tear off this slip and mail with your cheque. This will ensure we attribute your payment to the right account. No staples please.

Page 3 - Site Summary

Faults Number

This number will take you directly to the network provider that is responsible for the poles and wires in your area.
Call this number to report any faults and outages.

Site Address

This is the supply address the NMI and this bill relates to.


This is the date range and number of days that this bill covers.

Energy Usage

This shows your energy usage and charges for the time periods specified in your contract. The energy usage may be net of any generation back into the grid if you have a solar arrangement that allows for this. The time periods may be different depending on the State this site is in.

Environmental Charges

Charges relate to the various legislated State and Federal government green schemes. These Schemes may differ depending on which State the site is in.

Environmental Charges Loss Factor

The Loss Factor that is applied to metered usage to get the Total Price (excl GST) can be the Net Loss Factor, the Distribution Loss Factor or nil depending on the environmental scheme.

Network Charges

Network tariffs are charges we pass through via your bill on behalf of the local network provider in the area the site is located. The network provider determines your tariff based on the site’s electricity usage and consumption patterns. In some instances, Network /tariff time periods can differ from the time periods applied to your retail energy charges.

Market Operator Charges

These charges are passed through to you and represent your portion of the fees payable by us to the Australian Energy Market Operator, the manager of the National Electricity Market (NEM).

Metering Charges

Metering and other refers to metering charges payable under your agreement, either for metering arranged by ERM or directly by you under a direct agreement with a Metering Provider.

Power Factor

This is the ratio of real power (watts) compared to apparent power (volts amperes) flowing to this site. Some Network providers’ charges are affected by a less than optimal Power Factor (less than 1).

Load Factor

This is the average load divided by the peak load in a specified time period.

Carbon Intensity Index

This is an indexed figure which is based on the physical half hourly generation being dispatched into the National Electricity grid.

Loss Factors

Loss factors relate to energy lost due to electrical resistance and the heating of conductors as electricity flows through the transmission and distribution networks. These factors compensate for that loss. Losses are approximately 10 percent of the total electricity transported between power stations and market customers.


If you have solar installed and your meter has been configured you can see any consumption exported back to the grid in the NMI Profile Summary under BChannel Data.

Summary Info

CO2 emission relating to the period of the invoice. National CO2e refers to the average CO2 emissions across all states. The State CO2e refers to the CO2 emissions of the State of the site this bill refers to.

Page 4 - Adjustments


This section shows any charges relating to an earlier invoice. These may include interest for late payment or early payment discounts, adjustments to charges on a previous bill or one-off fees applied by the network or metering provider. Late or early payment adjustments typically do not attract GST, while other adjustments will be GST applicable.