Change Gas and Electric: Find Cheapest Supplier in Ireland

If you’ve been looking at your last few energy bills and wondering whether you’re paying more than you should, you’re not alone. Irish households can save an average of €300 to €685 per year simply by switching to a cheaper gas and electricity plan, and the process takes less than two days.

Average annual savings: €300 – €685 ·
Switching time: 24 to 48 hours ·
Number of electricity suppliers in Ireland: ~10 ·
Regulator: Commission for Regulation of Utilities (CRU) ·
Free to switch: Yes

Who is the cheapest gas and electricity supplier in Ireland?

As of March 2025, the cheapest dual fuel plan — combining gas and electricity from one supplier — is offered by Bord Gáis Energy, with an estimated annual bill of around €1,485, according to comparison data from Money Guide Ireland. But that figure changes monthly: suppliers adjust prices, and cashback offers expire. The best way to get the current cheapest is to check an accredited comparison site.

What do I need to switch to Electric Ireland?

• Your MPRN (11 digits) — found on your electricity bill or from ESB Networks
• Your GPRN (7 digits) — on your gas bill or from Gas Networks Ireland
• A recent bill or tariff details (optional but speeds up the search)
• No need to tell your current supplier — the new one handles everything

Who is the cheapest gas supplier in Ireland?

The cheapest gas-only supplier in mid-2025 is Flogas, according to Switcher.ie’s June 2026 price check, which shows Flogas at €1,492 per year on the national average consumption of 11,000 kWh. Bord Gáis Energy follows at €1,556. The gap is only around €64 per year — but that still matters over a typical two-year contract.

Who is the cheapest electricity supplier now?

Right now, Flogas offers the cheapest electricity-only tariff in Switcher.ie’s latest table: €1,492 annually for a typical 4,200 kWh user. Energia and Yuno Energy are close behind at €1,538 and €1,554 respectively. The difference between the cheapest and the most expensive (SSE Airtricity at ~€1,250/year on standard tariff) is over €200 — a real incentive to switch.

How can I switch energy supplier?

Switching is free and takes 24–48 hours, with no interruption to your supply. The CRU regulates the process to ensure it’s seamless. Here’s the step-by-step workflow.

1. Find your current supplier and tariff. Look at your latest bill. Note the unit rate, standing charge, and any exit fees (if you’re on a fixed-term contract).
2. Compare deals online. Use a CRU-accredited comparison site like Switcher.ie or Money Guide Ireland to see live tariffs.
3. Provide your MPRN and GPRN. These are printed on your bills. If you don’t have a recent bill, ESB Networks can provide your MPRN.
4. Let the new supplier handle the rest. You do not need to contact your current supplier. The new one notifies them and initiates the 24–48 hour transfer.
5. Wait for confirmation. Your supply continues without interruption. You have 14 days to cancel if you change your mind.

Can I switch an electricity provider online?

Yes — most providers in Ireland allow you to switch entirely online. You’ll need internet access and your MPRN. Switcher.ie reports that 90% of switches now happen digitally, with no paper forms needed.

How to change from Bord Gais to Electric Ireland

If you’re currently with Bord Gáis Energy and want to move to Electric Ireland, the process is the same as any other switch: get your MPRN and GPRN from your current bill, enter them on Electric Ireland’s website (or a comparison site), and confirm. A 14-day cooling-off period applies if you change your mind.

Is Flogas cheaper than Bord Gais?

This is one of the most common questions people ask when considering a switch. The short answer: Flogas is cheaper on electricity-only but Bord Gáis Energy wins on dual fuel — and the difference depends on standing charges and cashback offers.

Who is the most expensive electricity provider in Ireland?

As of 2025, SSE Airtricity holds the title for the most expensive standard electricity tariff in Ireland, with an estimated annual cost of €1,250 on the national average of 4,200 kWh — that’s over €200 more than the cheapest option. Switcher.ie notes that Electric Ireland sits in the mid-range, while Yuno Energy and Energia are closer to the top.

Can I switch an electricity provider online?

Yes — and it’s now the dominant method. Switcher.ie reports that close to 90% of Irish energy switches happen online. You’ll need your MPRN and internet access. The process is secure, and you can cancel within 14 days.

What do I need to switch to Electric Ireland?

• Your MPRN (11 digits)
• Your GPRN (7 digits)
• A recent bill (to confirm your current tariff)
• No need to contact your old supplier

Steps to switch gas and electric

1. Find your MPRN and GPRN. These are on every electricity and gas bill. If you don’t have a bill, call ESB Networks for your MPRN or Gas Networks Ireland for your GPRN.
2. Compare prices. Use Switcher.ie or Money Guide Ireland to see the latest tariffs.
3. Choose a plan. Pick either a dual fuel (one supplier for both) or separate suppliers. Check standing charges and exit fees.
4. Provide your MPRN and GPRN to the new supplier online or over the phone.
5. Confirm and wait. The switch takes 24–48 hours. You have 14 days to cancel.

“Switching energy supplier is free and easy. You do not need to contact your current supplier.”

— CRU consumer advice

“You can save hundreds of euro a year by switching energy provider.”

— MABS (Money Advice and Budgeting Service)

Summary

The bottom line for Irish households is clear: Bord Gáis Energy is the cheapest dual fuel supplier as of mid-2025, but Flogas wins on electricity-only tariffs. Switching is free, fast, and fully digital — and the only real risk is not knowing your MPRN. For anyone renting or buying a home in Ireland, the choice between dual fuel and separate suppliers comes down to how much gas you actually use. If you heat with gas year-round, dual fuel saves more. If you mostly use electricity, go with Flogas.