
Get Up to 40% Back: The IRPF Deduction for Energy-Efficient Windows (Until 2026)
Spain's income-tax deductions pay back 20%, 40% or even 60% of an energy-efficiency upgrade — and window replacement qualifies. But for homes the clock runs out on 31 December 2026. Here's exactly which tier you can claim, what each one requires, the certificate trap that disqualifies most rushed jobs, and how to estimate your refund.
