Bar shows the grant as a share of your quote. Rates checked 22 October 2026 on seai.ie. This SEAI heat pump grant calculator is an estimate; the grant can never exceed the cost of works, and your SEAI grant offer sets the amount.
Formula and breakdown
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This seai heat pump grant calculator adds up the Sustainable Energy Authority of Ireland grants for a home heat pump, checks them against the maximum for your home and heat pump type, and shows the net cost of your quote after the grant. It is for homeowners in Ireland weighing an installer’s price, and it also tells you whether a technical assessment is needed first.
Quick answer: An SEAI heat pump grant calculator adds the heat pump unit grant of up to €6,500, the central heating grant of up to €2,000 and the €4,000 Renewable Heat Bonus. A house can get up to €12,500, an apartment €9,500 and an air to air system €7,500, never more than the cost of works.
What Is an SEAI Heat Pump Grant Calculator?
An SEAI heat pump grant calculator is a tool that applies the published SEAI home heat pump grant amounts to your home type, heat pump type and existing heating, then limits the total to the scheme maximum and to your cost of works. In plain words: grant equals the unit grant, plus the central heating grant if radiator or underfloor upgrades are needed, plus the Renewable Heat Bonus if a fossil fuel or storage heating system is replaced, capped by the lower of the maximum and the quote.
SEAI describes the €12,500 house figure as made up of exactly those three parts, on its heat pump system grant page. The calculator shows each part on its own line, so you can see which condition is switching a grant on or off.
How Do You Use the SEAI Heat Pump Grant Calculator?
- Choose house or apartment, then the heat pump type on your quote.
- Pick what the heat pump replaces. Only an oil or gas boiler, solid fuel or electric storage heating earns the Renewable Heat Bonus.
- Say whether the installer’s design includes radiator or underfloor upgrades.
- Choose when the home was built and occupied, and whether you hold a valid BER with a heat loss indicator of 2.3 W/(K.m²) or less.
- Enter the total cost of works from your quote. The grant amounts fill in from SEAI; change them only if your offer letter differs.
- Read the grant, the net cost and the technical assessment line, and open the breakdown to check the arithmetic.
How Much Is the SEAI Heat Pump Grant in 2026?
On 22 October 2026 SEAI listed up to €12,500 for air to water, ground source, exhaust air and water to water heat pumps in houses, €9,500 for the same types in apartments and €7,500 for air to air systems in any home. In a blog post on the increased grant, SEAI says the higher amounts took effect on 3 February 2026.
| Grant part | House | Apartment | Condition |
|---|---|---|---|
| Heat pump unit grant | Up to €6,500 | €4,500 (SEAI figure for apartments) | Always, for an eligible home |
| Central heating grant | Up to €2,000 | €1,000 (derived: €9,500 minus €4,500 minus €4,000) | Radiator or underfloor upgrades in the installer’s design |
| Renewable Heat Bonus | €4,000 | €4,000 | Replaces an oil or gas boiler, solid fuel or electric storage heating |
| Maximum, water-based heat pumps | €12,500 | €9,500 | Never above the cost of works |
| Maximum, air to air | €7,500 | €7,500 | No hot water; unit part €3,500 derived from €7,500 minus €4,000 |
| Technical assessment grant | €200 | €200 | Listed separately by SEAI |
| Post-works BER grant | €50 | €50 | Listed separately by SEAI |
SEAI publishes the totals for apartments and air to air systems but does not split them into parts on the grant page. The values marked derived are worked out from those totals, so the SEAI heat pump grant calculator keeps every part editable in case your offer shows a different split.
Who Qualifies for the SEAI Heat Pump Grant?
Homes built and occupied before 2021 with an electricity meter point number (MPRN) qualify. If the home was built before 2007, SEAI requires a technical assessment unless you already have a valid BER showing a heat loss indicator of 2.3 W/(K.m²) or less; homes built from 2007 use a self-declaration form instead. A post-works BER by a registered assessor is needed before the grant is paid.
The heat loss indicator measures how much heat the home loses per degree of temperature difference for each square metre of floor. A home that loses heat quickly needs a larger heat pump and runs at higher cost, which is why SEAI asks for the check. Our room heat loss tool gives a feel for where the heat goes, though only the assessor’s figure counts for the grant.
What If You Are Replacing an Existing Heat Pump?
If the old heat pump never received an SEAI domestic grant, SEAI pays up to €6,500 for a house or €4,500 for an apartment, but not the Renewable Heat Bonus or the central heating grant. Choose “An existing heat pump that never had an SEAI grant” in the SEAI heat pump grant calculator and it drops those two parts automatically.
How Much Will the Heat Pump Cost After the Grant?
Net cost equals your quote minus the grant, and the grant can never be more than the total cost of works. SEAI does not publish a typical installed price for home heat pumps on its grant page, so the calculator uses an example quote of €16,000 that you should replace with your own.
Running cost matters as much as the upfront price. Use the heat pump running cost calculator to compare a year of heating against your current boiler, and the electricity cost calculator to price any extra appliances you plan to run. Installation involves refrigerant, electrical and plumbing work, so it must be carried out by an SEAI registered contractor with the right qualifications, never as a DIY job.
Worked Example: Oil Boiler Swap in a 1980s House
Example: a detached house in County Cork built in 1985 has an oil boiler and no current BER. The installer quotes €16,000 for an air to water heat pump with three larger radiators. The SEAI heat pump grant calculator adds €6,500 for the unit, €2,000 for the radiator upgrades and €4,000 for removing the oil boiler, a total of €12,500, which equals the house maximum.
The net cost is €16,000 minus €12,500 = €3,500, and the grant covers 78.1 per cent of the quote. Because the house was built before 2007 and has no qualifying BER, a technical assessment is required first, with a €200 SEAI grant towards it, and a €50 grant goes towards the post-works BER. If the same house had a heat pump fitted years ago without a grant, the grant would fall to €6,500 and the net cost would rise to €9,500.
What Should You Check Before Accepting a Quote?
Check that the contractor is registered with SEAI, that the quote names the heat pump type and output, and that radiator or underfloor work is listed if you expect the central heating grant. Make sure you have the grant offer before any work begins, and keep the old boiler removal in the scope if you are counting on the Renewable Heat Bonus.
Ask the installer to show the heat loss calculation behind the heat pump size. The heat pump size calculator is a useful cross-check, and once you have the final figures the SEAI heat pump grant calculator will show the grant and net cost in one place.
Frequently Asked Questions
How much is the SEAI heat pump grant?
On 22 October 2026 SEAI listed up to €12,500 for a water-based heat pump in a house, €9,500 in an apartment and €7,500 for air to air. The house figure is a €6,500 unit grant, up to €2,000 for central heating upgrades and a €4,000 Renewable Heat Bonus.
What is the Renewable Heat Bonus?
It is a €4,000 SEAI payment added when the new heat pump replaces an oil or gas boiler, a solid fuel system or electric storage heating. It is not paid when you replace an existing heat pump, so check what your quote says will be removed.
Do I need a technical assessment for the heat pump grant?
Homes built before 2007 need one unless a valid BER shows a heat loss indicator of 2.3 W/(K.m²) or less. SEAI gives a €200 grant towards the assessment. Homes built from 2007 onwards use a self-declaration form instead of an assessment.
Can the SEAI grant be more than the cost of the heat pump?
No. SEAI states that you cannot receive a grant that exceeds the total cost of works. If your quote is lower than the grant total, the grant is reduced to the cost of works, and the calculator applies that limit automatically.
Is there an SEAI grant for air to air heat pumps?
Yes. SEAI lists up to €7,500 for air to air heat pumps in houses and apartments. These systems heat rooms through indoor air units and do not provide hot water, so you may still need a separate way to heat water.
Which homes can get the SEAI heat pump grant?
Homes built and occupied before 2021 with an MPRN can apply. A post-works BER by a registered BER assessor is required before the grant is drawn down, and SEAI gives a €50 grant towards that BER.
Checked October 2026 by the Solaxyra Editorial Team. Sources: SEAI Heat Pump System Grant, SEAI: What’s a heat pump and is my home eligible?.