Flogas are to raise their prices by up to 20% as thousands of Irish customers are set to be hit even further by the cost of living crisis.
From August 19, its prices for gas will rise by 24.1%, while the increase for electricity is 9.8%.
It means that the average gas bill will go up by around €30, with electricity bills rising by at least €13.39.
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It's the second time this year that the company has put its' prices up, with the previous increase coming into effect in May.
"Unfortunately, there is no certainty around electricity and gas prices into the winter. We strongly urge customers to consider how they can reduce usage; every light switched off, door or window insulated, or phone charger unplugged, makes a difference," said Paul Kenny, general manager, Flogas Energy.
"As energy customers ourselves, we are keenly aware of the impact of increasing costs on Irish households," said Mr Kenny.
"Energy cost increases are affecting all suppliers and while we are continually looking at ways to keep our costs low, we have no option but to increase our rates in the current environment."
The energy supplier increased its gas and electricity prices four times in 2021.
Pressure has been put on the Government in recent weeks to introduce a 'mini-budget' to help the millions of Irish people struggling to cope.
As it stands, they will not do so before the autumn, when Paschal Donohoe will bring details of Budget 2023 to the Dáil.
The Summer Economic Statement was finalised on Sunday night with an extra €2 billion or more expected in spending.
Spending on new tax measures is to increase from €500 million to €1 billion in the Budget.
To tackle the cost of living crisis, Ministers are looking at another €200 energy credit payment to households, extending the fuel allowance and a Christmas bonus style payment - but in the autumn.
Junior Fianna Fáil Minister Robert Troy has said the summer economic statement shows that public finances are in a healthy position.
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