Understanding Your Electricity Bill
Your electricity bill uses confusing jargon that most Australians were never taught. This section decodes every term, charge and concept in plain English, backed by evidence from trusted Australian sources including the AER, Energy.gov.au, AEMO and your local distributor.
Top Questions Australians Ask
The 20 most common questions Australians search about their electricity bills, with clear, evidence-backed answers from trusted Australian sources.
Why is my electricity bill so high?
Your bill could be high due to an expired discount, increased usage, seasonal changes, faulty appliances, or higher rates. Start by checking if your benefit period has expired, then compare plans.
Source: Australian Energy Regulator (AER)
What is a supply charge?
A fixed daily fee you pay for being connected to the electricity grid, regardless of how much power you use. Typically 90 to 140 cents per day in NSW.
Source: AER Energy Made Easy
What is a kWh?
A kilowatt-hour is the standard unit of electricity. One kWh equals using 1,000 watts of power for one hour. Your bill charges you per kWh used.
Source: Energy.gov.au
What is my NMI?
Your National Meter Identifier is a unique 10 or 11 digit number assigned to your property's meter box. Find it on the front page of your bill. It stays the same even if you switch retailers.
Source: AER Energy Made Easy
What is a controlled load?
A separate circuit for high-energy appliances like electric hot water systems or pool pumps, charged at a cheaper off-peak rate. Appears as a separate line item on your bill.
Source: AER Energy Made Easy
What is a smart meter?
A digital meter that automatically sends usage data to your retailer. It enables Time of Use, demand and solar plans. Required for all new connections since December 2017.
Source: AER / NSW Government
Peak vs off-peak explained
Peak is the most expensive pricing period, typically 4pm to 9pm on weekdays. Off-peak is the cheapest, usually 10pm to 7am. Shoulder sits in between. Only applies on Time of Use plans.
Source: AER Energy Made Easy
What appliances use the most electricity?
Heating and cooling account for about 40% of household energy use, followed by hot water at 23%, other appliances at 14%, and standby power at 10%.
Source: DCCEEW / Energy.gov.au
What is a feed-in tariff?
The credit your retailer pays you for excess solar energy exported to the grid. Typically ranges from 4 to 10 cents per kWh, significantly less than grid purchase rates of 28 to 42 cents.
Source: AER Energy Made Easy / IPART
Why is my bill estimated?
Your meter could not be read, so the retailer estimated usage based on past patterns. Check if your bill says 'estimated' or 'E'. You can submit your own reading to get a corrected bill.
Source: AER Energy Made Easy
Why did my rates increase?
Your benefit period may have expired, or the retailer raised their rates. Many plans lock in discounts for 12 months then increase. Compare plans to find a better deal.
Source: Australian Energy Regulator (AER)
How much does an air conditioner cost to run?
A 2.4kW split-system running at full capacity uses 2.4 kWh per hour. At 30 cents per kWh, that is about 72 cents per hour. Running it for 8 hours a day adds about $5.76 to your daily bill.
Source: Energy.gov.au
What is a demand charge?
A charge based on your highest 30-minute usage spike during peak hours for the entire billing period. Running multiple high-draw appliances at once can set a high demand charge for the whole month.
Source: AER Energy Made Easy / Ausgrid
How often should I compare plans?
At least once a year, or when your benefit period expires. Many households save hundreds of dollars per year by comparing and switching. Set a calendar reminder to review annually.
Source: Australian Energy Regulator (AER)
Retailer vs distributor
Your retailer bills you and you can switch them anytime. Your distributor owns the poles and wires in your area and is fixed by where you live. Roughly 40 to 50% of your bill goes to the distributor.
Source: AER Energy Made Easy / AEMO
Why is my bill higher than last quarter?
Seasonal changes, expired discounts, or increased usage. Compare the average daily cost across bills rather than the total dollar amount to get a fair comparison.
Source: AER Energy Made Easy
How can I lower my bill?
Compare plans annually, reduce usage, shift to off-peak times, check for expired discounts, and eliminate standby power. Switching plans alone can save $200 to $500 per year.
Source: Australian Energy Regulator (AER)
Why am I still paying with solar?
You still pay the daily supply charge every day, and you buy grid power at night when panels are not producing. Maximise daytime self-consumption to reduce bills further.
Source: Energy.gov.au / Solar FiT benchmarks
What is average daily usage?
The total kWh used in a billing period divided by the number of days. The average NSW household without solar uses about 15 to 20 kWh per day. Your bill shows this for comparison.
Source: Energy.gov.au / DCCEEW
How do I know I'm on the right plan?
Compare your current plan against available offers using an independent comparison tool like GridMate. Check your usage rate, supply charge, and whether your discount has expired.
Source: Australian Energy Regulator (AER)
The Big Three
Every charge on your electricity bill belongs to one of three categories. Understand these three and you understand your bill.
Hidden Acronyms and Admin Terms
Your bill is full of acronyms and administrative terms that retailers never explain. Here is what each one means and why it matters.
Solar and Modern Technology
Solar panels, batteries, feed-in tariffs and demand charges are changing how Australians pay for electricity. Here is what each one means and how it affects your bill.
Contract Traps
Retailers use pricing structures that can quietly cost you hundreds of dollars per year. Here are the two most common traps and how to avoid them.
Retailer vs Distributor
Understanding who actually delivers your electricity and who just bills you for it is one of the most important concepts on your bill.
Rebates and Concessions
The NSW Government offers several rebates to help households with electricity costs. Check if you are eligible for any of these programs.
NSW Energy Rebate
Provides up to $180 per year to help low-income households pay their electricity bills.
Eligibility
Holder of a concession card (Pensioner Concession, Health Care Card, or DVA Gold Card)
How to apply
Apply through Service NSW or your retailer
Source: Service NSW
Seniors Energy Rebate
Provides up to $200 per year for self-funded retirees who hold a Commonwealth Seniors Health Card.
Eligibility
Commonwealth Seniors Health Card holders who do not qualify for the NSW Energy Rebate
How to apply
Apply through Service NSW
Source: Service NSW
Medical Energy Rebate
Provides up to $226 per year for households with a member who has a qualifying medical condition that requires the use of energy-intensive medical equipment.
Eligibility
Households where a member uses energy-intensive medical equipment at home, or has a qualifying condition (such as inability to self-regulate body temperature)
How to apply
Apply through your retailer with a medical certificate
Source: NSW Government
Family Energy Rebate
Provides up to $180 per year for families with dependent children who receive the Family Tax Benefit.
Eligibility
Families who receive the Family Tax Benefit and have dependent children
How to apply
Apply through Service NSW
Source: Service NSW
Life Support Rebate
Covers the cost of running essential life support equipment at home, such as oxygen concentrators and dialysis machines.
Eligibility
Households with approved life support equipment registered with their retailer
How to apply
Apply through your retailer with medical documentation
Source: NSW Government / Your retailer
Electricity Plan Types
Understanding the different types of electricity plans helps you choose the right one for your household's usage patterns.
Fixed Rate Plans
Your usage rate stays the same for the contract period, usually 12 months. Provides price certainty but may not include new discounts that become available.
Best for
Households who want price certainty and budget stability
Watch out for
Check if the rate is truly fixed or if supply charges can still change
Variable Rate Plans
Your rate can change at any time with notice from your retailer. More flexible with no lock-in contract but less predictable for budgeting.
Best for
Households who want flexibility and the ability to switch without exit fees
Watch out for
Rates can increase at any time with written notice from the retailer
Time of Use Plans
Price varies by time of day with peak, shoulder and off-peak periods. Cheapest for households that can shift usage to off-peak hours. Requires a smart or interval meter.
Best for
Households that can shift usage to off-peak and shoulder periods
Watch out for
If most of your usage is during peak hours, this plan can cost more than single rate
Demand Tariff Plans
Charges based on your highest 30-minute usage spike during peak hours. Best for households with flat, even usage throughout the day.
Best for
Households with consistent, spread-out usage who avoid running multiple appliances at once
Watch out for
A single 30-minute spike can set your demand charge for the entire billing period
Controlled Load Plans
A separate circuit for specific high-draw appliances at a discounted off-peak rate. Common for electric hot water systems and pool pumps.
Best for
Households with electric hot water systems or pool pumps that can run at specific off-peak times
Watch out for
The appliance only runs during the distributor's set hours, which you cannot control
Solar Plans
Includes a feed-in tariff for excess solar energy exported to the grid. Compare both the usage rate and the feed-in tariff when choosing.
Best for
Households with rooftop solar panels
Watch out for
A high feed-in tariff may come with a higher usage rate, so compare the total annual cost
EV Plans
Special rates for overnight EV charging, often with a dedicated off-peak window. Designed for electric vehicle owners who charge at home.
Best for
EV owners who charge at home overnight
Watch out for
Check the off-peak window times to ensure they match your charging schedule
Wholesale and Dynamic Plans
Rates that follow the wholesale electricity market price. Can be very cheap at times but risky during price spikes. Requires active monitoring.
Best for
Households who can monitor usage and shift consumption to low-price periods
Watch out for
During extreme weather or grid stress, wholesale prices can spike dramatically
Bills and Admin FAQ
Common administrative questions about electricity bills, from GST to disputes and back-billing.
Electricity Bill A to Z Glossary
Every technical term found on an Australian electricity bill, explained in plain English. Search or browse alphabetically.
23 terms found
Average Daily Usage
The total kWh used in a billing period divided by the number of days. Appears on your bill as a comparison tool to help you see if your usage is typical for your household size.
Why it matters
Comparing your average daily usage across bills helps you spot trends, seasonal changes, and unusual spikes that may indicate a problem.
Where on your bill
Usually shown as 'average daily usage' or 'daily average' in kWh on the usage summary section.
Billing Period
The start and end dates of your current bill, typically 90 days for quarterly bills or 30 days for monthly bills. The length affects how your usage is averaged.
Why it matters
A longer billing period will naturally show a higher total. Always compare the average daily cost, not just the total dollar amount.
Where on your bill
Shown as 'billing period' or 'bill period' dates on the front of your bill.
Controlled Load
A separate metered circuit for specific high-draw appliances, charged at a discounted off-peak rate. The distributor controls when this circuit is active, usually during late night hours.
Why it matters
Controlled load can significantly reduce the cost of running electric hot water systems and pool pumps by charging a cheaper rate.
Where on your bill
Appears as a separate line item labelled 'controlled load' with its own usage and rate.
Daily Supply Charge
A fixed daily fee for being connected to the electricity grid, charged regardless of how much electricity you use. Also known as a supply charge or fixed charge.
Why it matters
This charge adds up to $329 to $511 per year before you use any electricity. It cannot be reduced by using less power.
Where on your bill
Shown as 'daily supply charge' or 'supply charge' in cents per day on the charges breakdown.
Demand Charge
A charge based on your highest 30-minute usage spike during peak hours for the billing period. Only applies to customers on a demand tariff with a smart meter.
Why it matters
A single high-usage spike can set your demand charge for the entire month, even if you never repeat that pattern again.
Where on your bill
Appears as 'demand charge' in cents per kW or kVA per day on the charges breakdown, if applicable.
Distributor
The government-regulated company that owns and maintains the poles, wires and transformers in your area. You cannot choose your distributor, it is determined by where you live.
Why it matters
Roughly 40% to 50% of your bill goes to the distributor. Your distributor determines your network charges, which affect your final bill.
Where on your bill
Usually shown under 'network' or 'distributor' information on your bill, often near your NMI.
Feed-in Tariff
The credit your retailer pays you for excess solar energy your panels export to the grid. Rates vary by retailer and typically range from 4 to 10 cents per kWh.
Why it matters
Self-consuming your solar is worth 5 to 8 times more than exporting it, because grid power costs 28 to 42 cents per kWh.
Where on your bill
Appears as a credit or negative amount on your bill, labelled 'solar feed-in' or 'feed-in tariff'.
GST
Goods and Services Tax, applied at a flat rate of 10% to your total electricity charges (supply and usage).
Why it matters
GST adds 10% to your bill. Some government rebates are applied before GST is calculated, reducing the GST you pay.
Where on your bill
Shown as a separate line item on the final page or summary section of your bill.
kWh
Kilowatt-hour, the standard unit of electricity measurement. One kWh equals using 1,000 watts of power for one hour. Your usage charges are calculated by multiplying kWh used by your rate.
Why it matters
Understanding kWh helps you estimate appliance running costs and compare your usage to similar households.
Where on your bill
Shown throughout the usage section of your bill, in both total kWh and average daily kWh.
Market Offer
A discounted electricity plan offered by retailers, usually with a benefit period of 12 months. Most Australians are on market offers. Expired benefit periods can lead to higher rates.
Why it matters
When your benefit period expires, your discount may drop and your rates can increase. Set a reminder to review before expiry.
Where on your bill
Your plan name or offer type is usually shown on the front of your bill or in the plan summary.
Meter Read
The process of recording your electricity usage. Can be actual (real reading from a smart meter or meter reader) or estimated (calculated from past patterns).
Why it matters
Estimated reads can be too high or too low. Always check if your bill is estimated and submit your own reading if needed.
Where on your bill
Usually shown as 'A' for actual or 'E' for estimated near the usage section.
NMI
National Meter Identifier, a unique 10 or 11 digit number assigned to your property's meter box. It stays the same even if you switch retailers.
Why it matters
Your NMI is required for accurate plan comparisons and for switching retailers. It identifies your specific connection point on the grid.
Where on your bill
Usually shown on the front page of your bill near your account number, labelled 'NMI'.
Off-Peak
The cheapest pricing period on a Time of Use plan, typically 10pm to 7am. Best time to run dishwashers, washing machines and charge EVs.
Why it matters
Shifting usage to off-peak can cut appliance running costs significantly, as rates can be up to 3 times cheaper than peak.
Where on your bill
Shown as a separate usage category with its own rate if you are on a Time of Use plan.
Peak
The most expensive pricing period on a Time of Use plan, typically 4pm to 9pm on weekdays when demand on the grid is highest.
Why it matters
Peak rates can be up to 3 times higher than off-peak. Avoid running high-draw appliances during this window to save money.
Where on your bill
Shown as a separate usage category with its own rate if you are on a Time of Use plan.
Retailer
The company that bills you and handles customer service. You can choose and switch your retailer at any time. Examples include Origin, AGL and EnergyAustralia.
Why it matters
Switching retailers is the simplest way to save money on your electricity bill. Compare plans annually to ensure you are on the best deal.
Where on your bill
Shown on the front of your bill as your energy provider, along with their contact details.
Shoulder
The mid-priced period on a Time of Use plan, sitting between peak and off-peak. Typically morning and early afternoon hours on weekdays.
Why it matters
Shoulder rates are cheaper than peak but more expensive than off-peak. Running appliances during shoulder periods is a good compromise.
Where on your bill
Shown as a separate usage category with its own rate if you are on a Time of Use plan.
Single Rate Tariff
A pricing structure where you pay the same rate per kWh at all times of day. The simplest tariff type and easy to understand.
Why it matters
Single rate is best if your usage is spread evenly or if most of it occurs during peak hours. It may cost more than Time of Use if you can shift usage to off-peak.
Where on your bill
Shown as a single usage rate on your bill, without separate peak, shoulder or off-peak categories.
Smart Meter
A digital meter that automatically sends usage data to your retailer. Enables Time of Use, demand and solar plans. Required for all new connections since December 2017.
Why it matters
Smart meters give you access to more plan types and provide detailed usage data through online portals, helping you identify savings opportunities.
Where on your bill
Your meter type is usually shown in the meter details section of your bill.
Solar Export
The excess solar energy your panels send back to the grid. You receive a feed-in tariff credit for each kWh exported.
Why it matters
Solar export earns you a small credit, but self-consuming that energy is worth 5 to 8 times more. Maximise self-consumption first.
Where on your bill
Appears as a credit with the kWh exported and the feed-in tariff rate.
Standing Offer
The default regulated pricing your retailer must provide by law. Typically more expensive than market offers. You may be moved here if your benefit period expires.
Why it matters
Standing offers are usually the most expensive option. If you are on a standing offer, compare market offers to save money.
Where on your bill
Your plan type (market or standing) is usually shown on the front of your bill.
Tariff
The pricing structure used to calculate your electricity charges. Common types include single rate, Time of Use, controlled load and demand.
Why it matters
Your tariff type determines how you are charged. Choosing the right tariff for your usage pattern can save hundreds of dollars per year.
Where on your bill
Your tariff type is usually shown in the usage or charges breakdown section of your bill.
Time of Use
A tariff where the price per kWh changes based on the time of day, with peak, shoulder and off-peak periods. Requires a smart or interval meter.
Why it matters
Time of Use can save money if you can shift usage to off-peak. If most of your usage is during peak, a single rate may be cheaper.
Where on your bill
Shown as separate usage categories (peak, shoulder, off-peak) with different rates.
Usage Charge
The variable cost of the electricity you consume, calculated by multiplying kWh used by your rate per kWh. The biggest driver of your total bill.
Why it matters
A difference of 5 cents per kWh can mean $200 or more per year. Always compare usage rates when choosing a plan.
Where on your bill
Shown as 'usage charge' or 'consumption charge' with the rate in cents per kWh.