Cheapest Electricity Supplier Ireland 2026: Compare & Save

If you’ve opened your electricity bill lately and felt a pinch, you’re not alone — Irish households are seeing some of the highest annual costs in years. But a newcomer supplier called Waterpower is offering rates that undercut the traditional giants by hundreds of euros.

Cheapest annual bill (4,200 kWh): €1,491 (Waterpower, via Switcher.ie) ·
Most expensive annual bill (4,200 kWh): €2,220 (Pinergy, via MoneyGuideIreland) ·
Average annual bill across major suppliers: ~€2,000 ·
Recent price increase: SSE Airtricity +9.5% (March 2026)

The following five metrics summarize the price landscape at a glance.

Who is the cheapest supplier of electricity in Ireland?

Waterpower: the current cheapest

As of May 2026, the cheapest standard 24-hour electricity plan for an urban household (4,200 kWh) is offered by Waterpower at €1,491 per year when you pay by direct debit and receive eBills, according to Switcher.ie (Ireland’s leading comparison platform). That’s nearly €500 less than the market average.

How we compare: annual cost for 4,200 kWh

The national benchmark for a medium home is 4,200 kWh per year, as used by MoneyGuideIreland (personal finance website). All figures in this guide include VAT and standing charges unless stated.

Other low-cost suppliers

Yuno Energy and Electric Ireland are close behind, with annual costs around €1,554 and €1,558 respectively (MoneyGuideIreland). Enernigia’s Standard Electricity plan with direct debit and eBill comes in at €1,538 on Switcher.ie.

The implication: price leaders can shift quickly, so annual comparisons are essential.

SSE Airtricity vs Electric Ireland: which is cheaper?

Price comparison for standard plans

On standard 24-hour meters, Electric Ireland consistently comes in cheaper than SSE Airtricity. For a 4,200 kWh urban home, Electric Ireland stands at about €1,558 (first-year estimate) vs SSE Airtricity at €2,010 according to MoneyGuideIreland.

Why SSE Airtricity is often more expensive

SSE Airtricity announced a 9.5% price increase in March 2026, per Selectra.ie (energy switching guide). That hike pushed their standard annual bill above €2,000, making them one of the pricier options.

Electric Ireland’s pricing advantages

Electric Ireland hasn’t announced a large increase recently and offers competitive standing charges. Their green tariff is also priced similarly to the standard plan.

The pattern: Electric Ireland offers better value on standard meters, but SSE Airtricity’s smart tariff changes the equation.

Flogas vs Bord Gáis energy: a direct price comparison

Flogas standard electricity rates

Flogas offers competitive rates for standard meters. At the time of writing, their annual cost for 4,200 kWh is around €1,850–€1,900 (estimated based on comparison site data).

Bord Gáis standard electricity rates

Bord Gáis Energy is slightly cheaper, with annual bills around €1,780–€1,830 for the same usage, according to Switcher.ie.

Which offers better value for families?

Bord Gáis typically undercuts Flogas by about €50–70 per year. However, both are mid-range; they are neither the cheapest nor the most expensive. Families with higher usage (say 5,000+ kWh) might find better savings with Waterpower or Energia.

The pattern: Flogas and Bord Gáis are separated by only a small margin, but neither breaks into the top three cheapest.

Why is SSE Airtricity so expensive?

Recent price increase of 9.5%

The March 2026 increase — confirmed by Selectra.ie — added roughly €170 to the average annual bill.

Higher standing charges

SSE Airtricity’s standing charges are among the highest in the market. While unit rates are competitive, the fixed daily charge pushes the total up.

Green energy premium?

The company promotes 100% renewable electricity, but other suppliers (like Energia and Waterpower) offer similar green credentials at lower prices.

The takeaway: Standing charges matter as much as unit rates, especially for lower-usage homes.

Who are the most expensive electricity suppliers in Ireland?

Pinergy: top of the cost list

Pinergy tops the expense list with an annual bill of €2,220 for 4,200 kWh, according to MoneyGuideIreland. That’s over €700 more than Waterpower.

Energia and SSE Airtricity close behind

Energia costs about €2,075 and SSE Airtricity €2,010 (standard plans without discounts).

Why these suppliers charge more

Higher standing charges and unit rates. Energia, for example, has a standing charge of €265.01 per year (Energia official tariffs), while Waterpower’s is lower.

The implication: standing charges can make a huge difference. If you use less than 4,200 kWh, a high standing charge becomes even more punitive.

Here’s how the six largest suppliers stack up on standard plans.

Six suppliers, one pattern: the cheapest three all have lower standing charges and offer sizable direct-debit discounts. Waterpower, Yuno Energy and Electric Ireland form the budget tier; Pinergy and SSE Airtricity are the pricey outliers.

The catch: short-term savings require ongoing attention.

Timeline: recent price movements

• March 2026 — SSE Airtricity announces a 9.5% electricity price increase (Selectra.ie)

Price hikes have been concentrated so far; a broader wave could narrow the gap.

Clarity: confirmed vs. unclear

These uncertainties underscore why regular price checks are vital.

What industry experts say

“The 9.5% increase from SSE Airtricity is a significant blow for households already grappling with high energy costs.”

— Spokesperson, Power to Switch IE (energy switching service)

“Switching suppliers can save you up to €600 per year — the key is to compare at least once every 12 months.”

— MoneyGuideIreland (personal finance site)

For Irish households, the choice is clear: switch to Waterpower or Yuno Energy now and save hundreds. If you stick with SSE Airtricity or Pinergy, your annual bill will be €500+ higher for essentially the same electrons. The catch: you need to pay by direct debit and stay alert for when your discount period ends. Set a yearly reminder, compare on Switcher.ie or Bonkers.ie, and keep your energy costs in check.

For a broader comparison that includes both electricity and gas, see our guide to the cheapest gas and electric suppliers in Ireland.

Frequently asked questions

Regular comparisons remain the most reliable way to avoid overpaying.