IRPF deductions 2026: how much you can deduct for your solar installation

In 2026 the IRPF deductions for improving your home's energy efficiency with solar panels remain in force. Here is how to use them (always check with your adviser).
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Deducciones IRPF 2026: cuánto te puedes desgravar por tu instalación solar
Tax savings 2026

Installing solar panels does not just cut your electricity bill: it can also help you pay less on your income tax return. In 2026, the personal income tax (IRPF) deductions for improving your home's energy efficiency remain in force in Spain. Here is how they work, in plain language.

Very important: taxes depend on your personal situation. This information is for guidance only. Before applying any deduction, consult your tax adviser and the official information from the Spanish Tax Agency.

A deduction for improving your home's efficiency

The Spanish tax system allows you to deduct part of what you invest in works that improve your home's energy efficiency. A solar self-consumption installation fits this category, because it reduces the energy you draw from the grid.

Depending on the level of improvement you achieve, the applicable deduction rate has been set at three levels: 20%, 40% or 60% of the amount invested, within the limits and conditions set by the rules. The greater the reduction in consumption or energy demand you achieve, the higher the percentage.

In a nutshell

Part of the money you invest in your solar installation can come back to you as lower income tax. The exact percentage depends on the certified efficiency improvement and on your situation. That is why it is key to do it right from the start, with the proper documentation.

What if I run a business?

For self-employed people and companies, in addition to deductions there is the option of accelerated depreciation on corporate income tax for self-consumption investments. In practice, it lets you depreciate the investment quickly and improve the year's tax position. Your accountant or tax adviser can tell you how to apply it in your case.

How not to lose the deduction

  1. Keep every invoice for the installation and the proof of payment (preferably by transfer or card, not cash).
  2. Request the energy efficiency certificates before and after the work: they are the proof of the improvement achieved.
  3. Check the deadlines. These deductions have time windows; confirm that your installation falls within the valid period.
  4. Talk to your adviser before filing your return to apply the correct percentage.

Frequently asked questions

Is the deduction automatic?

No. You (or your adviser) have to apply it on your income tax return, providing the documentation that proves the investment and the efficiency improvement.

Can I combine the deduction with my regional grants?

In many cases yes, but there are limits: total support cannot exceed the full cost of the installation, and grants received may affect the deduction base. Check with your adviser.

Do batteries also qualify?

Storage is part of the home's efficiency improvement when integrated with the solar installation. How it applies depends on each case; your installer and adviser will guide you.

We help with the installation and the paperwork

We prepare your solar project with all the invoices and certificates in order so you can take advantage of the deductions. Ask us for a proposal at no commitment.

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Discover our solar kits and batteries for self-consumption. Official tax information at the Spanish Tax Agency.