Understand Your Utility Bill: Electricity & Gas in Ireland

Bill over a pile of coins

While some elements of your utility bill are fairly clear, others can be really confusing if you don’t understand all the terminology. In this guide, we explain common terms on your electricity and gas bill, as well as how to calculate them. This will make it easier for you to understand you energy bills so that you can then identify ways save money.

What is considered a utility bill?

magnifying glass and bill

Generally speaking, a utility bill can be for electricity, gas, water and garbage. Nowadays, TV, internet and phone plans can also be considered utilities, as they are common expenses in most Irish households.

Depending on your location, usage habits, the climate, the size of your home and other factors, the cost of your utility bills can vary quite a bit. Your utility bill contains valuable information, and you should always check the details carefully.

In this guide, we discuss utility bills that concern gas and electricity. These tend to be the most expensive bills, and by better understanding them, you can identify ways to cut your energy costs.

Key points to keep an eye on with electricity and gas bills are meter readings, price plans, balances and payment dates. You can also compare the unit usage with previous bills to help make sure you aren’t wasting any energy.

For further information on how to reduce your household bills, check out our guide on 101 ways to save money on your energy bills.

Do you have a prepayment meter? Head to our PAYG (pay as you go) guide for more information about this payment method.

Understanding your electricity bill

Your electricity bill will make up the bulk of your energy bill since electricity is more expensive than gas. You'll find common terms that appear on your electricity bill in the table below, along with their explanations.

Selectra man

Selectra can help sort out your energy bill queries with ease.

Need advice on billing? Call us for sound energy billing advice today.

1800 816 036 or
Selectra man

Save money on your energy bills with Selectra.

Selectra is currently closed. You can leave your phone number and get a free callback.

Bill Item Explanation
Account number This is the number for your personal account with your supplier and you should have it to hand when you need to contact them regarding any issues.
Supply address The address for the property where the electricity being billed is being used.
Billing address The address for billing purposes (may be different to supply address in the case of landlords for example).
MPRN Meter Point Reference Number indicates the point at which your house is connected to the electricity network. As such, if you move home this will change.
DG This indicates your Distribution Use of System (DUoS) profile, a charge that your supplier pays to the distribution network (ESB) on your behalf. DG1 indicates you have been assigned an urban domestic profile, and DG2 a rural one.
MC/MCC Stands for your Meter Configuration Code which indicates which type of meter you have.
Date of issue This is the date that the bill was issued on, not the date of receipt or the billing period.
Invoice number If there are any issues with a particular bill you’ll need to quote this number when discussing it with your supplier.
Billing period Usually 30 or 60 days.
Reading Type A, C or E. A means it was read by ESB, C means that the customer gave the meter reading, and E means it is an estimated reading based on details about your home and national usage statistics.
Payments This is a summary of all the payments you made previously.
Balance brought forward Credit or debit from the previous bill.
Charges for this period This contains a breakdown of your billing charges.
Pay by The date the bill is due. Normally payment is due within 14 days but for accounts in debit it’s normally due immediately.
Remittance advice/Giro slip To facilitate payment when the bills are not settled by direct debit.
Price plan The name of the plan you are on.
Meter readings The reading the current bill is based on and the previous bill’s reading.
Unit usage How many units of electricity you have used up. Energy units are measured in kilowatt-hours (kWh).
Unit price The rate your units are charged at. Unit usage multiplied by unit price will give you the total amount for your electricity usage before other charges are applied. If you are on a Nightsaver tariff, you will have two different unit prices for electricity.
Standing charge A fixed charge you pay to your supplier consisting of distribution network charges and the cost of the supplier for your account.
PSO levy This is a fixed government levy set by the Commission for Regulation of Utilities which pays for researching and generating renewable energy.
VAT The Value Added Tax for energy in Ireland is set at 13.5%.
Carbon Emissions This tells you how many kilos of carbon were produced by your household within the billing period.
Fuel Mix Displays the sources your supplier uses in order to generate electricity.

How to calculate your electricity bill

lightning bolts and calculator

Electricity bills are typically issued every two months. Do the following to calculate your electricity bill:

  1. Obtain your electricity usage. The average household consumes 700 kWh of electricity every two months. Multiply this number by your electricity unit rate.
  2. Obtain your daily electricity standing charge and multiply this number by 61 days (to give you the amount for two months). You can also calculate this cost by dividing your annual standing charge by six.
  3. Divide the PSO levy (which is €88.08 per year) by six.
  4. Add all of the above products and quotients together. This will give you the amount of your electricity bill per two months.

We show an example below for an urban household that consumes 700 kWh of electricity per two months on Electric Ireland's standard tariff. The unit rate is 19.9 eurocents per kWh. The standing charge is €173.29 per year.

(700 x €0.199) + (€173.29 / 6) + (€88.08 / 6)= €268.86
Answer: €268.86 per two months

In the table below, you'll find the best electricity offers per supplier.

Cheapest Electricity Offer per Supplier
Supplier Best offer Price per year
Bright Energy Has stopped trading No longer available
Bord Gáis Energy 39% Discount €1,185.00
Community Power Standard €2,291.59
Ecopower 25% Discount €1,759.42
Electric Ireland 30% Discount €1,280.00
Energia 27% Discount €1,405.44
Flogas 40% Discount
€220 Cashback


Iberdrola Has stopped trading No longer available
Panda Power 45% Discount €1,376.04
Pinergy Smart Tariff
€100 Cashback
Prepay Power Time of day tariff €1,692.30
SSE Airtricity 33% Discount €1,214.28
Waterpower Standard €1,985.27
Compare the Energy Market Call  01 903 6528  Ad  Mon - Fri: 9 am - 6 pm

*Figures are for illustrative purposes only. Calculations based on average consumption figures for an urban home with a 24-hour standard meter. All discounts and cashback have been applied. Last updated: August 2022

Understanding you gas bill

Your gas bill contains a lot of similar information to your electricity bill, generally you can expect to find the following on it.

Selectra man

Energy bills too high? Selectra can help!

Call one of our energy specialists today to find out how much you could save.

1800 816 036 or
Selectra man

Save money on your energy bills with Selectra.

Selectra is currently closed. You can leave your phone number and get a free callback.

Utility Bill Item Explanation
Account number Your unique identifier. Having this to hand will make calling customer support go more smoothly.
Supply address The address for the property at which the gas is being used.
Billing address If different to supply address.
GPRN Gas Point Reference Number indicates the point at which your house is connected to the gas network. As such, if you move home this will change.
AC Band Stands for Annual Consumption, and is represented by a letter indicating which estimated consumption bracket your household falls into. A less than 6500 kWh B 6000 kWh - 23,500 kWh C 23,000 kWh - 73,000 kWh Y 73,000 kWh - 750 MWh Z 750 MWh - 5,500 MWh
Meter number This is the number for the meter you currently have installed and will change if you get a new meter.
Date of issue This is the date that the gas bill was sent out.
Invoice number This is an identifier to be able to tell one bill from another.
Billing period This will shows the dates within which the unit rates were consumed that are being charged on the bill in question.
Reading Type This shows whether the reading was carried out by a professional (A), the customer (C), or whether it is an estimate (E) based on information about the home and historical usage data.
Payments This will show how the customer has agreed to pay the bills, and previos payments made.
Balance brought forward This will show whether your account is in credit or debit.
Charges for this period This details all the different charges that make up this specific bill.
Pay by The deadline that you need to pay by to avoid any penalties.
Remittance advice/Giro slip A section of the paper bill that lets you pay at the bank, or in some cases, at the post office.
Price plan The name of the price plan you are currently on with this supplier.
Meter readings The reading the current bill is based on, and the previous bill’s reading.
Unit usage The amount of gas units consumed. Gas units are measured by cubic metres (m3).
Conversion Factor The factor used to convert your units from m3 to kWh.
kWh The amount of gas kilowatts you are being billed for.
Rate Which unit rate you are being charged at (this is multiplied by the kWh to make up the total charge for energy consumed).
Standing Charge A charge your supplier adds to your bill to cover transmission and distribution charges. It is normally higher for rural customers.
VAT The Irish government has set VAT at 13.5% for gas.
Carbon Tax A carbon tax is a tax applied to gas, oil, and solid fuels. It is 0.535 cent/kWh including VAT.
Carbon Emissions The quantity of carbon produced by the consumption of gas in your household.
Fuel Mix Where your supplier has sourced their gas from.

How to calculate your gas bill

gas flame and bill

Calculating your gas bill is similar to calculating your electricity bill. Gas bills are usually issued every two months. We break down how to calculate it below:

  1. Obtain your gas usage (which is expressed in kWh). The average usage is 1,833 kWh per two months. Multiply this by the unit rate.
  2. Multiply the carbon tax (which is currently .535 eurocents/kWh) by your gas usage.
  3. Obtain your yearly standing charge and divide it by six (to give you the price for two months). For this step, you can also obtain your daily standing charge and multiply it by 61. This will give you the same answer.
  4. Add all of the above products and quotients together. This will give you the amount of your gas bill.

Below, we provide an example for an urban household that consumes 1,833 kWh of gas per month on Electric Ireland's standard tariff. The unit rate is 5.391 eurocents per kWh. The standing charge is €103.04 per year.

(1,833 x €0.05391) + (1,833 x €0.00535) + (€103.04 / 6) = €116.01
Answer: €116.01 per two months

Issues with your utility bill?

For any errors or issues with your utility bill, your first port of call is to contact your supplier and provide them with your account number and the invoice number. If your provider do not resolve your issue to your satisfaction, or if they are taking an inordinate amount of time to do so, you may then file an official complaint with the supplier. If you do so, don’t forget to get the complaint reference number before you get off the phone, as you will need it should you take the issue further.

If the issue with the utility bill still hasn’t been resolved within two months, you should then proceed to file a complaint with the CRU.

Selectra man

Talk to a real person – Fast! Speak to one of our energy advisers now!

Our free service will put you through to a real person without the wait.

1800 816 036 or
Selectra man

Save money on your energy bills with Selectra.

Selectra is currently closed. You can leave your phone number and get a free callback.

Why is my utility bill unusually high?

Nobody likes opening their bill and getting a nasty shock when they see the bill they had budgeted for is much higher than expected. Consider the following issues before contacting your supplier if you think your utility bill is excessively high.

  1. Season - Heating your home is much more expensive in the winter. Similarly, if the summer is unusually warm and you have the air-conditioning running, or fans on in every room, this can also contribute to a higher utility bill.
  2. Household Improvements - Have you had any renovations or extension-work carried out at your home during the past billing period? The contractors and the electricity they needed for the work to be carried out can increase your utility bill. Windows or doors may have also been left open while the heating was on, to increase drying time of materials. If new electricity points and lights were installed, this will also cost you more in terms of increased energy expenditure.
  3. Rate Increase - If you’re on a variable tariff, as are the majority of people in Ireland, it’s possible that your tariff unit rate has gone up. Even if you're not on a variable tariff, there have been changes to government levies (such as the carbon tax). It could also be that if you previously switched provider to avail of a discount, your discounted period has ended and you have been rolled on to the standard unit rate with no discount. If the latter is the case, you can try renegotiate a new discounted contract with your provider or switch to a cheaper electricity or gas offer.
  4. Additional People - If you’ve had visitors staying at your home, or if more people have been at home during the day due to illness or holidays, all those extra showers and increased hours of electricity and heating usage will add up.
  5. Moving Home - Have you recently moved home? Your new house may not be as energy efficient as your old one, or it may be larger in size. In particular, have a look at your home-heating and hot water elements (radiators, boiler, immersion…) to see what might be causing the increase. You can also check out our handy guide on the best way to heat your home.
  6. Estimated Bills - If your utility bill is very large and was estimated, it’s possible that your usage was overestimated and that you have been charged more than you should have been. Also, if a previous bill was estimated, it may have been underestimated and your next bill will be bigger due to including any shortfall from the amount you previously paid. This is particularly true of gas bills, where six are issued each year and two are estimated. If you receive an estimated bill, you should always submit a meter reading in order to keep your bill up to date and avoid any unpleasant surprises.
Updated on

The services and products mentioned on this website may only represent a small selection of the options available to you. Selectra encourages you to carry out your own research and seek advice if necessary before making any decisions. We may receive commission from selected partner providers on sales of some products and/or services mentioned within this website. Our website is free to use, and the commission we receive does not affect our opinion or the information we provide.