Compare Electricity Prices in Ireland 2021

man holding money and electricity

Here at Selectra, we know how expensive household gas and electricity prices can be. Gas and electricity tariffs in Ireland can also be somewhat confusing to understand and it can be even more difficult to compare electricity prices with so many variables.

We’ve done the needful and dug down deep to bring you comprehensive information on energy price comparison, how to switch gas and/or electric suppliers, and other ways to compare electricity prices and gas prices and save money.

How do I compare electricity prices in Ireland?

Below you'll find we've already compared current electricity and gas prices to find you the top cheapest packages today. However, if you're in any doubt you can also get out your calculator and dive down into your current bill and compare it against other providers' offerings.

To compare electricity and gas prices, there are a few things you’ll need to know and some items to have on hand in order to make the whole process easier. You’ll need:

  1. A recent bill from your energy supplier (to see unit rates and standing charges).
  2. A smartphone, tablet or computer to check current unit rates and offers with other gas and electricity suppliers.
  3. A calculator.
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For comparison purposes, you can either use your individual consumption cost or the EAB. Your individual consumption can be calculated by looking at your bills over a yearly period (regardless of whether you switched supplier in the same period) and adding up your usage in kWh (kilowatt-hours). You can then use this figure to calculate your consumption costs.

What is the EAB?EAB stands for Estimated Annual Bill and indicates a set bill amount calculated using the average household's electricity and gas consumption. The CRU is the organisation responsible for approving the EAB of each energy supplier. The current consumption amounts used to calculate the EAB are 4,200 kWh for electricity and 11,000 kWh for gas.

Compare electricity prices

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To compare electricity prices from different electricity suppliers to find the cheapest electricity rates we suggest calculating your annual electricity bill amount based on your current rates and tariff, and using that as a guide against potential providers’ offerings.

If you have added up your usage over one year you can use that in your calculations. Otherwise, use the average annual electricity consumption amount of 4,200 kWh (as we will be using).

For PAYG customers we would suggest adding together the day and night rates and dividing by two to calculate an electricity bill where you have moved half of your usage to the cheaper Nightsaver hours.

How to calculate your electricity bill

In order to calculate your electricity bill, you will need to know:

  1. Electricity unit rate

  2. Standing charge

  3. PSO

  4. VAT

If you are on a standard 24-hour tariff you will have one unit rate. However, if you are on a Nightsaver tariff you will need to know the day unit rate and the night unit rate. At least one-quarter of your household’s electricity usage would need to be used up during the Nightsaver hours in order to justify the additional standing charge for being on the tariff.

For calculation purposes, this means that you would need to calculate your unit rate by multiplying your night unit rate by 1,050 (one-quarter of the average usage rate of 4200), and your day unit rate by 3150 and add the two resulting figures.

Of course the more electricity usage you move to Nightsaver hours, the more you could save. This is why it is so important to think about your individual energy usage when you compare electricity prices. Ideally, you should aim to shift half of your usage to Nightsaver hours. If you think this could be the case for you then simply add together the day rate and night rate and divide by two to give you the average of what you would be paying with a 50:50 split.

The PSO levy is the Public Service Obligation levy. It is used to subsidise renewable and indigenous energy development in Ireland. It is set by the government and as in 2020 is currently set to €88.80 including VAT.

As with gas, VAT on electricity is set at 13.5%. So, for a standard tariff with no discounts or welcome credit, and an electricity unit rate of 17.39cent per kWh:


Annual Amount

Unit rate

(€0.1739 x 4200) + 13.5% = €828.98

Standing charge

€147.75 + 13.5% = €167.70





To calculate how much your bill would be with discounts and/or credit offered by energy suppliers for new customers, you simply repeat the above (as with gas) but apply the discount to the unit rate and subtract any welcome credit from the total.

Compare gas prices

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To compare gas prices and get a realistic idea of the savings you could make on your gas bills, we suggest calculating your average consumption using your current gas rates and comparing it with gas provider offers.

We will be using the average annual consumption amount of 11,000 kWh as an example. If you have any further doubts about reading your utility bill or are confused by the terminology, we recommend you check out our guide to understanding your utility bill.

How to calculate your annual gas bill

There are four initial components of how a gas bill is calculated:

  1. Gas unit rate
  2. Standing charge
  3. Carbon tax
  4. VAT

The standing charge is an annual fee, while the gas unit rate and carbon tax are charged per kWh. The carbon tax is set by the government and is usually updated yearly. It is currently set at 0.00535 cent, including VAT, per kWh.

The VAT is then added on at a rate of 13.5%. So for example, with a unit rate of 5.75c excluding VAT and an annual standing charge of €90 also excluding VAT, the calculation would be as follows:


Annual Amount

Unit rate

(€0.0575 x 11000) + 13.5% = €717.89

Standing charge

€90 + 13.5% = €102.15

Carbon tax

0.00535 x 11000 = €58.80



The total above represents a standard tariff with no discounts or free credit for switching. Discounts are usually only against the standard unit rate, not the entire amount billed. If you’ve been with your supplier for over a year then chances are you have defaulted to a standard rate tariff.

Now that you know your estimated annual bill with your current supplier you can calculate the savings you could make by comparing electricity prices and changing supplier.

View the current offers with the supplier you are checking (or check out their Selectra provider page which contains unit rates and offers information). Now perform the same calculation as above but with the new unit rate, discount, and any credit offered.

For example, if the standard unit rate on offer is 5.8c excluding VAT with an 8% discount and €50 welcome credit, the new comparison calculation would be:


Annual Amount

Unit rate

((€0.058 - 8%) x 11000) + 13.5% = €666.20

Standing charge

€90 + 13.5% = €102.15

Carbon tax

0.00535 x 11000 = €58.80


€827.15 - €50



In this case, we can see that by switching supplier you could theoretically save around a hundred euro a year. In most cases, if you have defaulted onto a standard tariff and are switching to a discounted one, you can usually save more, up to several hundred euros per year.

For those cases where customers have a gas PAYG meter, the process for calculating their annual bill is the same except they will also have to add in the annual PAYG service charge

Compare dual fuel prices (electricity and gas)

In order to compare a dual fuel offer to your current provider’s gas and electric charges, you will need to calculate your current rates for electricity and gas as shown above, and then do the same for the new discounted tariff (separately again).

The only difference between calculating for a dual fuel offer is that you will need to check whether any discounted unit rates apply to both fuels, different rates apply to each, or the discount is just against one.

If you are looking for a cheaper dual fuel rate, you should still calculate separate tariffs that are not necessarily from the same provider, in order to see where the bigger savings lie.

While dual fuel tariffs tend to be more heavily discounted than single fuel tariffs - and you may prefer to just deal with one provider - sometimes a better deal can be had by splitting your electricity and gas between two different providers. So, it is important to check all these factors when you compare electricity prices.

Box - Comparing your current tariffs to other electricity and gas suppliers offers every 12 months is the surest way to save money and keep your bills down. In fact, the CRU recommends switching energy providers every 12 months.

Now I've compared: How do I switch energy providers?

An electricity lightbulb and gas flame on a blue and white background

So you’ve compared electricity prices and are ready to switch. We have good news for you. While years ago switching energy providers would have resulted in a mountain of paperwork, nowadays switching is relatively painless. Simply compare electricity and gas offers, and either call customer service or switch online.

You may be sent out a physical paper contract to sign in some cases, and that’s it. Your new energy provider will take care of the rest for you and there will be no need to contact your old provider and cancel your contract.

In many cases, when switching, you will also be asked for your MPRN (Meter Point Reference Number) or GPRN (Gas Point Reference Number). These can usually be found on any of your current gas or electricity bills.

Box - If you are still in contract with your current provider, you may be charged an exit fee for switching. So do check the fine print of your contract or you could receive a nasty surprise with your final bill.

Compare electricity prices the easy way with Selectra

Of course, going through the same process for each tariff can be incredibly time-consuming given the countless number of energy providers and electricity tariffs out there. Here at Selectra, we make things easy by doing the hard work for you, freeing up time for the more important things in life.

Armed with just a few details about yourself, your home and a rough idea of your energy consumption, our expert team of energy advisors compare electricity prices and tariff rates from across the market to find the best deal to suit you.

Give us a call today on 020 3966 4692 or get a free call back now to find out how much you could save. We’ll find you a fixed or variable tariff that works for your needs and also advise on whether direct debit billing or prepayment is the best option.

  • What details do I need when calling to compare electricity prices?
  • The name of your current supplier and tariff
  • Your average monthly or annual energy consumption in kWh or pounds
  • Your contract end date
  • You can find all of this information on your latest bill or through your current energy supplier’s online portal.

What do I need to do next?

If you like the sound of one of our exclusive tariffs we’ll set you up with a switching date. Your new supplier will take care of just about everything to do with the changeover from your current electricity provider.

How long will it take to switch over?

Your switch will take no more than 15 days, including a 14-day cooling-off period. During these 14 days, you’re free to cancel the switch and stay with your current supplier if you change your mind.

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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.