the trick with which owners will pay less in rent in 2026

The Income Tax Declaration campaign 2025-2026 brings with it important news for taxpayers. According to the Tax Agency, as of April 8, 2026 You can begin to file the declaration online, the most agile and recommended way for the majority of citizens.

For those who prefer other methods, the organization has enabled the clothing option by phone starting May 6 and attention in person in offices active since June 1. The deadline to submit the declaration without incurring surcharges will be June 30which allows taxpayers to organize in advance and avoid last-minute problems.

Tax benefits in the income tax return

Beyond the deadlines, it is essential that citizens know the tax benefits that can reduce your tax burden. One of the most relevant deductions for this campaign is related to the energy efficiency improvement works in homes.

This measure, extended until December 31, 2026 through the Royal Decree-Law 16/2025 published in the Official State Gazette (BOE)allows owners to deduct a percentage of the cost of renovations that contribute to reducing the demand for heating and cooling in their habitual residence or in properties they own that are intended for rental.

In order to apply this deduction, it is essential that the work really improves the energy efficiency of the property. This is accredited by a certificate issued by a competent technicianwhich should reflect the situation before and after the works. The regulations require that the improvement be, at least, 7%. Without this certificate, the Tax Agency does not recognize the deduction.

The reduction due to works to improve energy efficiency

The deduction percentage varies depending on the type of home and the characteristics of the works. In residential buildingsyou can deduct up to a 60% of the total cost of the reforms. For individual homesthe applicable percentages are between 20% and 40%. In addition, this benefit can also be applied to rental properties, as long as the renovations contribute to improving energy efficiency.

The 2025-2026 Income campaign is also an opportunity to review other possible deductions and tax benefits. For example, some taxpayers can access deductions related to investment in primary residence, family expenses or sustainability improvements.