Grants for Replacing Your Boiler in Barcelona 2026

If you are replacing your boiler in Barcelona, this is what you need to know today (September 2026):

• There is no grant for a new gas boiler. Since 1 January 2025, the EU Energy Performance of Buildings Directive (Directive (EU) 2024/1275) does not allow financial incentives for boilers that run only on fossil fuels, even condensing ones.
• There is support for heat pumps (aerothermal), but the large direct Next Generation grants have closed. What remains open is mainly the income tax (IRPF) deduction and Energy Saving Certificates (CAE).

Status of the grants (September 2026)

1. Income tax (IRPF) deduction for energy-efficiency improvements

This is the most useful scheme today if you replace a gas boiler with a heat pump. Royal Decree-Law 7/2026 extended it and Parliament ratified it in March 2026.

Which one applies. Replacing a boiler with a heat pump lowers the home’s energy consumption, not its demand (which depends on insulation). That is why it usually falls under the 40% deduction. To qualify, the works must achieve one of these:

• cut non-renewable primary energy consumption by at least 30%, or
• bring the home to an A or B energy rating.

How much you can deduct: 40% of what you pay, on a maximum base of €7,500, i.e. up to €3,000. Any grant received for the same works is deducted from the base.

Key requirements:

• It applies to your main home or to a home you own and let.
• You need two energy performance certificates: one before the works start and one afterwards. They are issued by an energy assessor, who checks whether the 30% or the A/B rating is reached.
• The works must be done by 31 December 2026 and the post-works certificate must be issued before 1 January 2027.
• The deduction is claimed in the tax return for the year the post-works certificate is issued.
• Cash payments do not count: pay by card or bank transfer.

Example: heat pump installation paid, €9,000. Maximum base, €7,500. Deduction: €7,500 × 40% = €3,000 less income tax, if the requirements are met.

There is also a 20% deduction for works that cut heating and cooling demand by at least 7% (insulation, windows…) and a 60% deduction for energy renovation of the whole building, usually led by the owners’ association.

More information: Spanish Tax Agency, deduction for lower energy consumption (in Spanish).

2. Energy Saving Certificates (CAE)

The energy saved by replacing a combustion boiler with a heat pump can be certified and sold. It is covered by form RES060 in the catalogue of the Ministry for the Ecological Transition.

How it works: an agent or buying company calculates the saving, processes the certificate and pays you for it. The amount depends on the installation’s saving and the CAE price at the time, so there is no fixed figure.

Documents usually required:

• the itemised invoice;
• before and after photos;
• the installer’s certificate with the unit’s data;
• the commissioning notice;
• the energy performance certificate.

It is best to apply soon after the installation. Check with the agent whether it is compatible with any other support you have received.

3. Interior renovation grants for flats let through the Borsa de Lloguer

This only applies if you are going to let your flat through Barcelona’s Borsa d’Habitatge de Lloguer (affordable rental scheme) or the city’s emergency housing programmes. In that case the Housing Consortium funds up to €30,000 of interior works, including upgrading individual installations (water, electricity, gas) and energy improvements. Applications are open until 30 November 2026. More information from the Barcelona Housing Consortium.

Closed calls

The Barcelona Housing Consortium‘s Next Generation home energy-efficiency programme ended on 30 June 2026, and ICAEN’s PREE is closed. If a new call opens, we will update this guide.

What if I need to replace my gas boiler right now?

If your boiler has a serious fault or is very old, replacing it with a condensing boiler is still a valid option, even without a grant:

• it uses considerably less gas than an old conventional boiler;
• in our catalogue it costs from €1,600, installation and VAT included (see installed prices);
• in Barcelona, where almost every building already has mains gas, it is usually the simplest and quickest solution, and it is replaced in a single day.

If you can plan ahead and your flat allows it, a heat pump is worth considering. Bear in mind that the IRPF deduction only covers works done by 31 December 2026.

Documents we provide

We give you the installation documents needed for the deduction and for CAE:

• itemised invoice in your name;
• installation certificate and commissioning notice;
• technical data sheets for the unit;
• before and after photos.

Energy performance certificates are issued by an energy assessor. If you do not have one, we can put you in touch with the assessor we work with.

Frequently asked questions

Is there a grant for a condensing gas boiler?
No. Since 2025 EU rules do not allow subsidies for boilers that run only on fossil fuels.

How much can I save with a heat pump?
With the 40% deduction, up to €3,000 off your income tax if the works meet the requirements, plus whatever you get for the CAE.

Do I need the energy certificate before the works?
Yes. The IRPF deduction requires two certificates: one before starting and one afterwards. If you start without the first one, you lose the deduction.

Does it apply to a rented flat?
The IRPF deduction applies to your main home and also to a home you own and let.

Do you help with the grants?
Yes. We tell you which grants are open for your case, provide all the installation documents and put you in touch with the energy assessor we work with.

Not sure which option is right for you?

JAG Alcaide has been installing heating in Barcelona since 1953. We help you choose between a heat pump, a hybrid system or a condensing boiler, and tell you which grants fit your case.

Call us on +34 932 185 847 or WhatsApp us on +34 616 946 678. We usually quote from photos or a video via WhatsApp; if needed, we make a free technical visit in Barcelona and the metropolitan area.

Information reviewed in September 2026 from official sources (Spanish Tax Agency, Ministry for the Ecological Transition, Barcelona Housing Consortium and ICAEN). Grants may change: always check the official terms before applying.