Overview
- Deductions are set at 20%, 40% or 60% based on measured improvements, with thresholds of at least a 7% cut in heating and cooling demand, a 30% drop in non‑renewable primary energy use, or achieving an A or B energy rating.
- For individual dwellings, eligible payments must be made by 31 December 2026 and the post‑works energy certificate must be dated before 1 January 2027, with the deduction applied in the tax year of that second certificate.
- Whole‑building rehabilitations qualify for a 60% deduction on a €5,000 annual base with carryforward for up to four years to a €15,000 cumulative base, allowing a total benefit of €9,000 per owner.
- Two energy performance certificates—one before the works and one after—are required from a qualified technician to substantiate the claimed improvement.
- Only bank‑traceable payments are valid, prior subsidies reduce the deductible base, and fossil‑fuel equipment along with purely aesthetic or maintenance works are excluded; the relief covers main homes and properties rented or intended for rent by end‑2027, with each community member deducting their proportional share.