Air pollution taxes in Spain: framework and instruments

Air pollution taxes in Spain are not a single national levy but a combination of regional taxes on industrial emissions, transport taxation and the EU carbon price. This guide explains the legal framework in force in 2026, the main instruments and what they mean for companies.

Air pollution is one of the most serious environmental and public-health problems, and a priority target for environmental policy and green taxation. The aim of these fiscal instruments is to internalise the cost of pollution and steer industry and transport towards cleaner technologies.

The legal framework for air quality in Spain

Regulation combines European and national rules:

1. European framework: the European Green Deal and the Fit for 55 package drive emission reductions and carbon-pricing instruments.
2. Climate Change and Energy Transition Law 7/2021: sets decarbonisation targets and enables instruments for sectors such as industry and transport.
3. Directive 2010/75/EU on industrial emissions (IED) and national air-quality rules, which govern limits and permits for installations.
4. Regional taxes: several autonomous communities have created their own taxes on emissions to the atmosphere.

The main fiscal instruments on air quality

Regional taxes on industrial emissions

The bulk of Spain's pollution-specific taxation is regional. These taxes apply to emissions from industrial installations, usually sulphur dioxide (SO₂), nitrogen oxides (NOₓ) and, in some cases, CO₂, with tax-free thresholds and rates per tonne:

• Galicia: a tax on atmospheric pollution covering SO₂ and NOₓ; installations emitting more than 80 tonnes a year must register in the tax census.
• Aragón: an environmental tax on the emission of pollutants to the atmosphere (SOₓ, NOₓ and CO₂), with exempt minimums and rates per unit emitted.
• Other regions: Castilla-La Mancha, Catalonia, the Region of Murcia and Andalusia have developed similar instruments.

At national level, Law 12/2014 also regulates taxes on nitrogen-oxide emissions from commercial aviation and on gases and particulates from certain industries. This patchwork creates territorial differences that are worth checking with Manglai's legislation checker.

Transport taxation

Road transport is a leading source of urban pollution. It is subject to:

• The excise duty on hydrocarbons, which taxes petrol and diesel.
• The special tax on certain means of transport (registration tax), banded by CO₂ from 0% to 14.75%.
• Low-emission zones: not a tax, but they restrict or charge access for the most polluting vehicles in municipalities.

The carbon price (EU ETS and ETS2)

Many industrial and power-generation installations already pay for their emissions through the EU Emissions Trading System (EU ETS). From 2027 (possibly 2028), the new ETS2 will extend that price to fuels used in buildings and road transport. We cover this in our guide to carbon emissions taxes.

What it means for companies

Costs and competitiveness

For fuel-intensive industry, these taxes mean higher costs, but also an incentive to invest in energy efficiency and clean technologies that cut both emissions and the tax bill. Companies that move early improve their reputation and their access to demanding markets.

Support and offsetting measures

To soften the impact, public authorities offer grants and deductions:

• Subsidies to replace equipment (boilers, emission-filtering systems).
• Deductions linked to emission-reduction plans.

You can read more in subsidies for sustainable businesses.

Frequently asked questions

Is there a national air pollution tax in Spain?

Not as a general levy. There are regional taxes on industrial emissions, national taxes on fuels and vehicle registration, sector-specific national instruments such as those under Law 12/2014, plus the European carbon price.

Which regions tax emissions to the atmosphere?

Galicia, Aragón, Castilla-La Mancha, Catalonia, the Region of Murcia and Andalusia, among others, with different rates and exempt minimums.

Are low-emission zones a tax?

No. They are an access restriction that may include charges, but they are not a tax on emissions as such.

To get ahead of this taxation, the first step is to know your emissions: Manglai's carbon footprint solution gives you the data to manage them and reduce your fiscal exposure.