Spanish tax break could return hundreds to low-wage workers

Millions of Spanish workers are facing a surprising opportunity: a potential tax refund, even if they weren't previously required to file. A recent adjustment to the IRPF (Income Tax) system, spurred by the government’s ongoing increases to the minimum interprofessional salary (SMI), could see as many as 3 million people receive up to €591 back in the 2026 tax return, filed in 2027.

Understanding the new deduction

The shift stems from the government's efforts to mitigate the fiscal impact of the SMI increases. As the SMI climbs—reaching €1,221 gross per month in 2026—more workers are being pushed above the traditional minimum tax threshold, potentially triggering tax liabilities they hadn't previously faced. The revised deduction aims to prevent this “fiscal jump,” ensuring those earning the SMI aren’t penalized for their wage increase.

The mechanics are straightforward. For income earned in 2026, the deduction caps at €591 for annual gross incomes up to €17,094—equivalent to the SMI. This amount gradually diminishes as income rises, remaining applicable up to approximately €20,000. The change represents a significant expansion from 2025, when the deduction was capped at €340 and extended to €18,276.

While typically, those with a single employer and income below €22,000 annually aren't obligated to file, Hacienda (the Spanish tax agency) is now urging a wider group to submit a return. Specifically, workers earning between €15,876 (the 2024 SMI that wasn’t previously taxed) and €20,000 are strongly advised to do so. Even those earning between €20,000 and €22,000 might find it worthwhile, especially if they have other eligible deductions.

The regional impact is notable. Canary Islands, Murcia, and Extremadura are projected to have the highest percentage of workers in this income bracket, while Catalonia, Madrid, and Aragon are expected to have the lowest.

The move is a calculated response to protect vulnerable workers from unintended consequences of the SMI increases, a political priority for the current administration. But whether this targeted tax relief represents a genuine economic benefit or simply a complex accounting maneuver remains to be seen, especially as future SMI increases necessitate further adjustments to the IRPF system.