{"id":128840,"date":"2026-04-07T10:00:45","date_gmt":"2026-04-07T10:00:45","guid":{"rendered":"https:\/\/gesvalt.es\/?p=128840"},"modified":"2026-04-08T11:06:40","modified_gmt":"2026-04-08T11:06:40","slug":"irpf-deductions-for-energy-efficiency-works-on-dwellings","status":"publish","type":"post","link":"https:\/\/gesvalt.es\/en\/blog\/deducciones-irpf-obras-eficiencia-energetica-viviendas\/","title":{"rendered":"Deductions for energy efficiency in the IRPF: what works can you deduct in your income tax?"},"content":{"rendered":"<p>The<strong> energy efficiency deductions in personal income tax allow you to pay less in your income tax return<\/strong> when certain works are carried out that demonstrably improve the energy performance of a dwelling or residential building. Depending on the type of improvement action, <strong>the deduction can reach 20%, 40% or 60%<\/strong>, with limits and requirements.<\/p>\n<p>However, it is not enough to have renovated the property. In order to be able to apply these deductions it is necessary to<strong> have a prior and subsequent energy performance certificate<\/strong> to the work, with proof of the improvement, invoices and proof of payment, and <strong>comply with technical and fiscal requirements<\/strong> as indicated in the regulations.<\/p>\n<p>At Gesvalt we are specialists in the valuation and technical analysis of properties. Contact us if you need <a href=\"https:\/\/gesvalt.es\/en\/companies\/sustainability\/environmental-certifications\/\" target=\"_blank\" rel=\"noopener\">environmental certifications<\/a> or <a href=\"https:\/\/gesvalt.es\/en\/rate\/housing\/\" target=\"_blank\" rel=\"noopener\">home valuation.<\/a><\/p>\n<p>&nbsp;<\/p>\n<h2>What are energy efficiency deductions?<\/h2>\n<p><strong>Energy efficiency deductions are tax incentives<\/strong> The tax credits applicable to certain energy improvement works in dwellings and residential buildings. Law 35\/2006 (Personal Income Tax) regulates three temporary deductions <strong>linked to concrete results measured by energy certificate<\/strong>, not just any generic reform.<\/p>\n<p>In practice, it is not the work itself that is rewarded, but the fact that the work achieves a sufficient reduction in heating and cooling demand, in the consumption of non-renewable primary energy or an improvement in the energy rating of the building or the building.<\/p>\n<p>&nbsp;<\/p>\n<h2>What deductions are there in the IRPF for energy improvement works?<\/h2>\n<p>These are the three main state deductions in force for this area. The 20% and 40% apply to work carried out up to 31 December 2026, while the 60% for <strong>energy rehabilitation of buildings<\/strong> is extended until 31 December 2027.<\/p>\n<div class=\"gesvalt-table-wrap\">\n<style>\n    \/* Estilo base (desktop) *\/<br \/>    .gesvalt-table-wrap{<br \/>      width:100%;<br \/>      overflow-x:auto;<br \/>      margin:18px 0;<br \/>    }<\/p>\n<p>    .gesvalt-table{<br \/>      width:100%;<br \/>      border-collapse:collapse;<br \/>      font-family: inherit; \/* tipograf\u00eda del tema *\/<br \/>      font-size:16px;<br \/>      line-height:1.3;<br \/>      min-width:1100px; \/* 6 columnas *\/<br \/>    }<\/p>\n<p>    .gesvalt-table th{<br \/>      background:#1e5fa8; \/* azul cabecera *\/<br \/>      color:#ffffff;<br \/>      text-align:left; \/* TODO izquierda *\/<br \/>      padding:12px 14px;<br \/>      font-weight:700;<br \/>      border:2px solid #cfcfcf;<br \/>      vertical-align:top;<br \/>    }<\/p>\n<p>    .gesvalt-table td{<br \/>      background:#f2f2f2; \/* gris filas *\/<br \/>      color:#2b2b2b;<br \/>      text-align:left; \/* TODO izquierda *\/<br \/>      padding:12px 14px;<br \/>      border:2px solid #cfcfcf;<br \/>      vertical-align:top;<br \/>    }<\/p>\n<p>    \/* \u2705 Responsive SIN scroll: filas como \u201ctarjetas\u201d con mini-cabecera azul *\/<br \/>    @media (max-width: 768px){<br \/>      .gesvalt-table-wrap{ overflow-x:visible; }<br \/>      .gesvalt-table{ min-width:0; }<br \/>      .gesvalt-table thead{ display:none; }<\/p>\n<p>      .gesvalt-table tr{<br \/>        display:block;<br \/>        margin-bottom:14px;<br \/>      }<\/p>\n<p>      .gesvalt-table td{<br \/>        display:block;<br \/>        width:100%;<br \/>      }<\/p>\n<p>      .gesvalt-table td::before{<br \/>        content: attr(data-label);<br \/>        display:block;<br \/>        background:#1e5fa8;<br \/>        color:#fff;<br \/>        font-weight:700;<br \/>        padding:10px 12px;<br \/>        margin:-12px -14px 10px -14px;<br \/>        border-bottom:2px solid #cfcfcf;<br \/>        text-align:left;<br \/>      }<br \/>    }<br \/>  <\/style>\n<table style=\"font-size: .8em\" class=\"gesvalt-table\" aria-label=\"Table of energy efficiency deduction rates\">\n<thead>\n<tr>\n<th>Type of deduction<\/th>\n<th>Percentage<\/th>\n<th>Main technical requirement<\/th>\n<th>Property to which it applies<\/th>\n<th>Deductible limit<\/th>\n<th>Deadline<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td data-label=\"Tipo de deducci\u00f3n\">Reduction of heating and cooling demand<\/td>\n<td data-label=\"Porcentaje\">20%<\/td>\n<td data-label=\"Requisito t\u00e9cnico principal\">Reduce the sum of heating and cooling demand by at least 7%.<\/td>\n<td data-label=\"Inmueble al que aplica\">Permanent residence or rented\/expected rental accommodation<\/td>\n<td data-label=\"L\u00edmite deducible\">Maximum base \u20ac5,000<\/td>\n<td data-label=\"Plazo\">Works until 31\/12\/2026<\/td>\n<\/tr>\n<tr>\n<td data-label=\"Tipo de deducci\u00f3n\">Improvement of non-renewable primary energy consumption<\/td>\n<td data-label=\"Porcentaje\">40%<\/td>\n<td data-label=\"Requisito t\u00e9cnico principal\">Reduce by at least 30% the consumption of non-renewable primary energy or achieve class A or B<\/td>\n<td data-label=\"Inmueble al que aplica\">Permanent residence or rented\/expected rental property<\/td>\n<td data-label=\"L\u00edmite deducible\">Maximum base 7.500 \u20ac.<\/td>\n<td data-label=\"Plazo\">Works until 31\/12\/2026<\/td>\n<\/tr>\n<tr>\n<td data-label=\"Tipo de deducci\u00f3n\">Energy rehabilitation of buildings<\/td>\n<td data-label=\"Porcentaje\">60%<\/td>\n<td data-label=\"Requisito t\u00e9cnico principal\">Reduce by at least 30% the non-renewable primary energy consumption of the building or achieve class A or B<\/td>\n<td data-label=\"Inmueble al que aplica\">Dwellings in residential buildings of predominantly residential use<\/td>\n<td data-label=\"L\u00edmite deducible\">Annual base 5.000 \u20ac and maximum cumulative base 15.000 \u20ac.<\/td>\n<td data-label=\"Plazo\">Works until 31\/12\/2027<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3>Deduction for heating and cooling demand reduction<\/h3>\n<p><strong>This is the 20% deduction.<\/strong> Applies to works in the <strong>habitual dwelling or in another dwelling that is rented for residential use<\/strong> (or that you will rent before 31 December 2027). The technical requirement: the new energy performance certificate must show a reduction of at least 7% in heating and cooling demand compared to the previous one. <strong>The maximum annual base is 5,000 euros.<\/strong><\/p>\n<h3>Deduction for improvement of non-renewable primary energy consumption<\/h3>\n<p><strong>This deduction amounts to 40%.<\/strong> Also for <strong>usual or rented accommodation<\/strong> (or in the expectation of renting). It requires that the building work reduces non-renewable primary energy consumption by at least 30%, or that the dwelling achieves class A or B. <strong>Maximum annual base: 7,500 euros.<\/strong><\/p>\n<h3>Deduction for energy rehabilitation of buildings<\/h3>\n<p><strong>The 60% deduction for residential buildings.<\/strong> It can be used by homeowners in such buildings when the energy renovation lowers the building's non-renewable primary energy consumption by at least 30%, or brings it up to class A or B. The maximum annual base is EUR 5,000, but the excess can be carried over to the following four years, up to a cumulative total of EUR 5,000. <strong>15,000 euros.<\/strong><\/p>\n<p>&nbsp;<\/p>\n<h2>Requirements for applying the deduction<\/h2>\n<p>Before including an energy efficiency deduction in the income tax, a very specific list of conditions should be reviewed.<\/p>\n<h3>Which dwellings are eligible?<\/h3>\n<p>They can fit:<\/p>\n<ul>\n<li>The habitual residence.<\/li>\n<li>Another dwelling of the taxpayer rented for use as a dwelling.<\/li>\n<li>Other housing in the expectation of renting, provided that it is rented before the legal deadline.<\/li>\n<li>In the 60% deduction, dwellings located in buildings of predominantly residential use.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Which energy certificate do you need?<\/h3>\n<p>You need a <strong>energy performance certificate before and after the work,<\/strong> issued by a competent technician and registered in accordance with Royal Decree 390\/2021. In addition, the above certificate will be valid if no more than two years have elapsed between its issue and the start of the works.<\/p>\n<h3>Which payments and invoices should you keep?<\/h3>\n<p>It is advisable to save:<\/p>\n<ul>\n<li>Complete invoices for the work.<\/li>\n<li>Proof of payment.<\/li>\n<li>Energy certificates.<\/li>\n<li>Technical project, report or project management, where they exist.<\/li>\n<li>Documentation of subsidies received.<\/li>\n<li>In community actions, the distribution or allocation of the expense that corresponds to you.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>The deductible base requires payments made by card, transfer, cheque or direct debit. <strong>Cash is not eligible for deduction.<\/strong><\/p>\n<h3>What expenses can be included?<\/h3>\n<p>The standard allows the quantities necessary for the execution of the work to be computed, including:<\/p>\n<ul>\n<li>Professional fees.<\/li>\n<li>Project drafting.<\/li>\n<li>Site management.<\/li>\n<li>Cost of implementation.<\/li>\n<li>Equipment and materials.<\/li>\n<li>Other expenses necessary for the development of the action.<\/li>\n<li>Issue of the energy certificate.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>In buildings with a community of owners, <strong>the base of each taxpayer is calculated according to its participation coefficient.<\/strong><\/p>\n<h3>Which expenses are not deductible?<\/h3>\n<p>They are not eligible for deduction, among other cases:<\/p>\n<ul>\n<li>Cash payments.<\/li>\n<li>Amounts subsidised, to be deducted from the base.<\/li>\n<li>Costs related to the installation or replacement of equipment using fossil fuels.<\/li>\n<li>In the 20% and 40% deductions, works on parts affected by economic activity, parking spaces, storage rooms, gardens, parks, swimming pools, sports facilities and similar elements.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Frequent errors<\/h3>\n<ul>\n<li>To think that any \u201csustainable\u201d reform is tax-deductible.<\/li>\n<li>Not having the previous and subsequent certificate correctly registered.<\/li>\n<li>Include cash payments.<\/li>\n<li>Forgetting to deduct subsidies.<\/li>\n<li>Take it for granted that a boiler or a fan heater automatically deducts.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>Do you need to accredit the energy improvement of your home? Don't miss our <a href=\"https:\/\/gesvalt.es\/en\/blog\/what-is-the-energy-certificate-of-a-dwelling\/\" target=\"_blank\" rel=\"noopener\">guide to the energy certification of a house.<\/a><\/p>\n<p>&nbsp;<\/p>\n<h2>Which works are usually related to these deductions?<\/h2>\n<p>Searches on <strong>\u201cenergy efficiency deductions\u201d.\u201d<\/strong> The number of people who have been affected by the crisis intensifies as the income tax season approaches and starts.<\/p>\n<h3>Window replacement<\/h3>\n<p>Replacing windows can help to reduce thermal losses and improve the building envelope, and can therefore qualify for the 20% deduction or even contribute to the 40% deduction if the overall energy performance proves it. It is not enough to simply replace the windows: the subsequent certificate must reflect the required improvement.<\/p>\n<h3>Aerothermal<\/h3>\n<p>Aerothermal heating can be one of the easiest ways to improve non-renewable primary energy consumption, especially if combined with insulation or replacement of window frames. Even so, <strong>the deduction in IRPF for aerotermia is not automatic:<\/strong> depends on the subsequent certificate attesting to the legal threshold of improvement.<\/p>\n<h3>Boiler replacement<\/h3>\n<p>Here it is particularly important to be cautious. Not every change of boiler is tax deductible. The Personal Income Tax Act excludes from the deductible base the costs of installation or replacement of equipment using fossil fuels, so that a gas or diesel boiler should not be included in the base for these state deductions. This would be different in the case of non-fossil systems that also contribute to the improvement claimed.<\/p>\n<h3>Solar panels<\/h3>\n<p>Solar panels can help to reduce the consumption of non-renewable primary energy and therefore help to meet the 30% requirement or improve the energy rating. Again, the key is not simply to install panels, but for the effect to be reflected in the comparative energy certificate.<\/p>\n<h3>Insulation and other energy improvement works<\/h3>\n<p>Insulation of the fa\u00e7ade, roof, floors or interiors, as well as other actions on the building envelope, are common candidates because they directly affect the heating and cooling demand. Improving energy efficiency can also influence the value of the property. See how it influences<\/p>\n<p>You can find more information at <a href=\"https:\/\/gesvalt.es\/en\/blog\/home-renovation-increase-its-value\/\" target=\"_blank\" rel=\"noopener\">how energy efficiency influences property value<\/a> and in <a href=\"https:\/\/gesvalt.es\/en\/rate\/housing\/\" target=\"_blank\" rel=\"noopener\">home valuation.<\/a> It may also be useful to review <a href=\"https:\/\/gesvalt.es\/en\/blog\/what-mortgage-related-expenses-can-i-deduct\/\" target=\"_blank\" rel=\"noopener\">what expenses associated with the mortgage you can deduct.<\/a><\/p>\n<p>&nbsp;<\/p>\n<h2>How much can you deduct on your tax return?<\/h2>\n<p>The answer depends on the type of work, the proven energy performance and the accepted basis after deduction of subsidies.<\/p>\n<p><strong>A practical example with aerothermal energy:<\/strong> Imagine an ordinary house in which aerothermal energy is installed and the insulation is partially improved. The total deductible cost amounts to 7,500 euros and the subsequent certificate certifies a reduction of 32% of non-renewable primary energy consumption. In this case, the action could fit into the 40% deduction, with a tax saving of 3,000 euros. If the same action had received a subsidy of 2,000 euros, the basis for deduction would drop to 5,500 euros and the deduction would be 2,200 euros.<\/p>\n<p>&nbsp;<\/p>\n<h2>In which financial year is it declared?<\/h2>\n<p>The <strong>deduction for energy efficiency in income tax returns<\/strong> is generally applied in the year in which the final energy certificate is issued, after the work has been carried out. In other words, in order to be included in the rent, this certificate must be issued within the period stipulated in the regulations.<\/p>\n<p>If the final certificate is issued in a different year than that of the payments, the deduction is applied in that later year, adding up everything paid from the legal start of the works until 31 December of that same year.<\/p>\n<p>Before <strong>tick the deduction box on the Renta website,<\/strong> it is advisable to check that the certificate has been issued in time: for 20% and 40% deductions, before 1 January 2027; and for 60%, before 1 January 2028.<\/p>\n<p>&nbsp;<\/p>\n<h2>What documentation should be kept?<\/h2>\n<p><strong>The prudent thing to do is to conserve:<\/strong><strong>\u00a0<\/strong><\/p>\n<ul>\n<li>Energy certificate before and after<\/li>\n<li>Invoices<\/li>\n<li>Bank statements<\/li>\n<li>Grant documentation<\/li>\n<li>Technical documentation of the work<\/li>\n<li>In communities, the breakdown of the amount imputed to the owner<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>The AEAT may require supporting documentation to prove that the requirements for the deduction are met.<\/p>\n<p>&nbsp;<\/p>\n<h2>What to check before submitting your income tax return?<\/h2>\n<p><strong>Before submitting the declaration, check:<\/strong><strong>\u00a0<\/strong><\/p>\n<ul>\n<li>That the work fits one of three deductions<\/li>\n<li>That the certificates are correct and comparable<\/li>\n<li>That the base does not include cash payments and excluded items<\/li>\n<li>That you have discounted subsidies<\/li>\n<li>That you are not trying to apply two incompatible deductions on the same work.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>The AEAT reminds that the three deductions are to be completed in<a href=\"https:\/\/sede.agenciatributaria.gob.es\/Sede\/ayuda\/consultas-informaticas\/renta-ayuda-tecnica\/renta-web-tramitacion-borrador-declaracion.html\" target=\"_blank\" rel=\"noopener\"> Renta Web<\/a> within \u201cGeneral deductions from the quota\u201d and which are incompatible with each other in respect of the same work. In the Renta 2025 campaign, the total amount of this deduction appears in box 0567, in Annex A.3 of the tax form. This numbering should be reviewed each tax year.<\/p>\n<p>&nbsp;<\/p>\n<h2>Common mistakes when applying energy efficiency deductions<\/h2>\n<p><strong>The most common failures are quite repetitive:<\/strong><\/p>\n<ul>\n<li>Not having the correct energy certificate<\/li>\n<li>Thinking that any reform is tax-deductible<\/li>\n<li>Failure to keep invoices or proof of payment<\/li>\n<li>Confusing subsidy with deductible base<\/li>\n<li>Assuming that aerothermal energy or a change of boiler automatically deducted<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2>Conclusion<\/h2>\n<p>The <strong>energy efficiency deductions for personal income tax purposes<\/strong> can be very relevant, but they are not automatically applied. They depend on the fact that the work fits one of the legal assumptions, that the energy improvement is accredited with a certificate and that the tax documentation is well closed.<\/p>\n<p>In addition to tax savings, an energy improvement can influence the perception and value of the property. To analyse this, please consult our <a href=\"https:\/\/gesvalt.es\/en\/rate\/housing\/\" target=\"_blank\" rel=\"noopener\">home valuation<\/a> or our content on <a href=\"https:\/\/gesvalt.es\/en\/rate\/\" target=\"_blank\" rel=\"noopener\">real estate valuation.<\/a><\/p>\n<p>&nbsp;<\/p>\n<h2>Frequently asked questions on energy efficiency deductions<\/h2>\n<h3>Is aerothermal energy tax-deductible?<\/h3>\n<p>It may give the right to a deduction, but not automatically. What is relevant is that the performance meets the technical requirements and is accredited with the subsequent energy certificate.<\/p>\n<h3>Can window replacement be deducted?<\/h3>\n<p>It can help to fit the deduction, especially for thermal envelope improvements, but only if the certificate proves the required savings.<\/p>\n<h3>Is the change of boiler tax-deductible?<\/h3>\n<p>It depends on the system. The standard excludes equipment using fossil fuels from the deductible base, so it cannot be generally stated that any change of boiler is tax-deductible.<\/p>\n<h3>Is the energy efficiency certificate included in the deduction?<\/h3>\n<p>Yes, the basis may include the issuing of the corresponding energy certificates, provided that the other requirements are also fulfilled.<\/p>\n<h3>What documents does the tax authorities ask for?<\/h3>\n<p>As a minimum, you should have energy certificates, invoices, proof of payment and, where applicable, technical and subsidy documentation. The AEAT may require documents to accredit the deduction.<\/p>\n<h3>In which box is the deduction included?<\/h3>\n<p>In Renta 2025, the total amount of the deduction for works to improve the energy efficiency of dwellings appears in box 0567 of the model, within Annex A.3.<\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>The IRPF deduction can be up to 60% for home improvements involving energy efficiency improvements. <\/p>","protected":false},"author":1,"featured_media":195706,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5,46],"tags":[7],"class_list":["post-128840","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-particulares","category-sostenibilidad","tag-precio-de-la-vivienda"],"acf":[],"_links":{"self":[{"href":"https:\/\/gesvalt.es\/en\/wp-json\/wp\/v2\/posts\/128840","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gesvalt.es\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gesvalt.es\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gesvalt.es\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gesvalt.es\/en\/wp-json\/wp\/v2\/comments?post=128840"}],"version-history":[{"count":8,"href":"https:\/\/gesvalt.es\/en\/wp-json\/wp\/v2\/posts\/128840\/revisions"}],"predecessor-version":[{"id":195982,"href":"https:\/\/gesvalt.es\/en\/wp-json\/wp\/v2\/posts\/128840\/revisions\/195982"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gesvalt.es\/en\/wp-json\/wp\/v2\/media\/195706"}],"wp:attachment":[{"href":"https:\/\/gesvalt.es\/en\/wp-json\/wp\/v2\/media?parent=128840"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gesvalt.es\/en\/wp-json\/wp\/v2\/categories?post=128840"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gesvalt.es\/en\/wp-json\/wp\/v2\/tags?post=128840"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}