Budget 2027 Cut the Carbon Tax on Home Heating: What It Means for Irish Homes

Budget 2027 cut the carbon tax on home heating oil and natural gas in Ireland from €63.50 to €48.50 per tonne, and froze the rate until 2030. The change was announced by Minister for Finance Simon Harris on 6 October 2026, and it cancels the increases that had been due on 1 May 2027. At the time of writing (October 2026), it takes some of the pressure off winter heating bills and shifts the running-cost maths for homes weighing a switch to solar, a battery or a heat pump.

What Did Budget 2027 Change for Home Heating?

The Budget moved the carbon tax in two directions at once.

• Home heating fuel got cheaper. The carbon tax on kerosene and natural gas fell by €15 per tonne, from €63.50 to €48.50, and will not rise again until 2030.
• Petrol and diesel were paused, not cut. They stay at €71 per tonne. The rise that had been due in October 2026 is deferred, with two increases now set for 2027.
• Solid fuels still increase. Coal, peat, briquettes and marked gas oil rise to €78.50 per tonne on 1 May 2027.

The Minister set out the rates in his Budget 2027 statement, and RTÉ's coverage of the climate measures confirms the heating cut alongside the rises on other fuels.

*Rates correct as of October 2026. Carbon tax amounts are subject to change in future budgets.*

How Much Does the Carbon Tax Cut Save a Household?

The cut is €15 per tonne of CO2. A 1,000-litre fill of kerosene carries about 2.5 tonnes of CO2, so the change takes roughly €43 off the price once VAT is included. A household that burns 1,750 litres over the heating season saves in the region of €75.

It is real money, but it is modest beside the price of the fuel itself. The Minister tied the cut to high global oil and gas prices, and those prices, not the tax, decide what most households pay at the tank or the meter.

Does the Cut Change the Case for a Heat Pump?

Partly, and it is worth being straight about it. A lower carbon tax makes oil and gas heating a little cheaper to run, which lengthens the payback on a heat pump at the margin.

The direction of travel has not changed, though. The rate is frozen rather than removed, and a future government can revisit it. Electricity prices remain high, and several suppliers raised them again this autumn. A heat pump paired with rooftop solar and a home battery still beats an oil boiler on cost and emissions across the life of a system.

What Has Changed for Solar Owners?

The Budget also raised the amount of income you can earn from exporting surplus solar power to the grid before tax applies, to €600 a year. More homeowners can now earn from their solar export without a tax bill.

For most homes, though, the bigger lever is using the power you generate rather than exporting it. A battery lifts self-consumption from around 30% to 70%, which shelters you from every future price rise. Our SEAI grant guide explains what is open right now, including the €600 battery grant that started on 6 October 2026.

What Should Homeowners Watch Next?

• 1 May 2027. Petrol, diesel, coal, peat and marked gas oil rise. Home heating oil and gas do not.
• 13 October 2027. A second rise on petrol and diesel, with the carbon tax on those fuels moving back toward €100 per tonne by 2030.
• 2030. Heating oil and gas are held at €48.50 until then, but the rate is a policy choice and any new government could change it.

Final Thoughts

The carbon tax cut lowers the cost of heating with oil and gas, and it removes the increases that had been pencilled in for next spring. It does not change the underlying trend, though. Grid electricity is still rising, the heating rate is frozen rather than gone, and the homes that generate and store their own power feel these changes least. Solar, a battery and, where a house suits it, a heat pump remain the most durable way to cut a bill.

Ready to Cut Your Home Energy Bills?

WattCharger can assess your home and show you what solar panels, a battery or a heat pump could save you, with full SEAI grant support. Get in touch for a free consultation and see how much you could take off your winter bill.