Every time you pay an electricity bill, book a flight or buy cement for a renovation, you're paying, without knowing it, a small slice of the EU Emissions Trading System (EU ETS). The question is simple: who really carries the cost of carbon, and who comes out ahead?
The EU ETS has been running since 2005 and covers around 40% of the EU's greenhouse gas emissions. Its rule is tough but easy to grasp: whoever pollutes must surrender one emission allowance (EUA) for every tonne of CO₂. The number of allowances shrinks every year, so carbon gets more expensive. Let's look at what that means in practice, sector by sector.
How the EU ETS works in 60 seconds
- Cap: the EU sets the total number of allowances in circulation, and that cap falls every year.
- Trade: companies buy allowances at auctions or from each other. Those that cut emissions can sell what they don't need.
- Carbon price: the EUA price is set by the market. In recent years it has ranged roughly between €60 and €100 per tonne of CO₂.
- Target: a 62% cut in emissions from ETS sectors by 2030 compared with 2005.
The result so far? Emissions from the installations covered by the system have fallen by almost half since 2005. But the progress hasn't been even. Some sectors raced ahead, while others are still struggling.
Who pays: EUA costs by sector
Power generation: the big loser that became a winner
Coal and lignite plants are the most exposed. Every megawatt-hour from lignite carries roughly a tonne of CO₂, so with high carbon prices they stopped paying their way. Greece is a textbook case: its lignite phase-out sped up precisely because lignite plants became so expensive to run.
The flip side is a wave of investment in:
- solar farms and wind power,
- energy storage with batteries and pumped hydro,
- grid upgrades for decentralised generation.
For consumers, the CO₂ cost feeds into wholesale prices whenever gas and coal set the price of electricity. The more renewables enter the system, the less that cost weighs on our bills.
Heavy industry: steel, cement, chemicals
Here the equation is harder. In cement, for example, a large share of the CO₂ comes not from fuel but from the chemical process itself. You can't switch it off with a few solar panels on the roof.
That's why these sectors received many free allowances until recently, so that production wouldn't move outside the EU (so-called "carbon leakage"). That is changing. From 2026, free allowances for steel, cement, aluminium, fertilisers and hydrogen are being phased out. At the same time, the Carbon Border Adjustment Mechanism (CBAM) enters full application, putting a price on the CO₂ embedded in imported goods too.
What industry is doing to cut the bill:
- energy efficiency upgrades and energy audits,
- electrifying processes and signing green power purchase agreements (PPAs),
- recycled feedstock and circular-economy practices,
- pilot projects with green hydrogen and carbon capture and storage (CCS).
Aviation and shipping: the bill reaches your ticket
Flights within the European Economic Area have been in the EU ETS since 2012, and from 2026 airlines no longer receive free allowances. Since 2024, maritime transport has also been phased into the system, which matters a lot for seafaring nations and for ferry fares.
Companies are responding with newer, more efficient aircraft and ships, optimised routes and sustainable aviation fuels (SAF), which the EU now requires to be blended in at rising shares.
Buildings and road transport: ETS2 comes home
Until now households were affected only indirectly, through electricity and materials. That changes with ETS2, a second trading system for heating fuels in buildings and for road transport fuels. Its launch is scheduled for the end of the decade (2027–2028). In practice, heating oil, natural gas and petrol will gradually carry a carbon price.
What does that mean for you? Investments that cut your use of fossil fuels become even more valuable:
- insulation and windows that improve your energy efficiency rating,
- a heat pump instead of an oil boiler,
- rooftop solar panels,
- an electric or hybrid car when it's time to change.
To soften the impact on vulnerable households, the EU has set up the Social Climate Fund, which will finance energy upgrades and clean mobility. For more on fair distribution, read our article on the cost and social impacts of carbon pricing.
Who benefits: the upside of the EU ETS
Fewer emissions, with measurable results
The system has delivered on its promise, at least in the power sector. Replacing coal with renewables and gas is the main reason ETS emissions have fallen so sharply. For the global picture, explore our interactive map of CO₂ emissions by country.
Billions for the green transition
Allowance auctions bring tens of billions of euros a year to EU member states. Since the system's revision, all of that revenue must go to climate and energy action, such as:
- renewable energy and storage projects,
- home energy upgrade programmes,
- support for vulnerable households and regions in transition,
- research and innovation in low-carbon technologies.
Two EU funds are also financed by the ETS: the Innovation Fund, for breakthrough industrial projects, and the Modernisation Fund, for the energy systems of lower-income member states.
Innovation and new jobs
Once carbon has a price, clean technology becomes competitive. That fuels markets for solar, batteries, heat pumps, smart grids and carbon accounting software, and with them new jobs for engineers, installers and energy consultants.
A practical guide: what the EU ETS means for your business
Even if your company isn't in the ETS, your customers, banks and suppliers probably are. Five steps so you're not caught off guard:
- Measure your carbon footprint (Scope 1, 2 and 3). No measurement, no strategy.
- Run an energy audit of your sites. It usually reveals the cheapest savings.
- Consider self-generation with solar or a green power contract to lock in costs.
- Check your CBAM exposure if you import steel, aluminium, cement or fertilisers from outside the EU.
- Benchmark your performance against your sector. See how carbon benchmarking works.
Voluntary carbon markets: a complement, not a substitute
Alongside the mandatory ETS runs the voluntary carbon market (VCM). There, companies buy certified credits from projects that reduce or remove CO₂, such as reforestation or renewables in developing countries.
Caution is needed, though. Voluntary credits do not count towards ETS compliance, and their quality varies widely. Use them only for emissions you genuinely can't cut yet, choose recognised certification standards, and avoid unsupported "carbon neutral" claims. New EU rules against greenwashing are now scrutinising them closely.
What comes next
- The cap will keep falling, so carbon is expected to stay expensive.
- Free allowances for industry will be phased out by 2034, as CBAM expands.
- ETS2 will bring a carbon price to heating and road fuels.
- Shipping will pay for all of its covered emissions.
For the full mechanics of the system, read the EU Emissions Trading System explained.
The takeaway
The EU ETS doesn't share the cost evenly or painlessly. Power generation has been transformed, heavy industry is entering the hard phase, and soon the carbon price will reach our radiators and fuel tanks. At the same time, it funds the green transition and makes every energy-saving investment pay off faster.
The real question isn't whether we'll pay for carbon. It's whether we'll adapt before it gets even more expensive. How are you preparing, at home or in your business? Share this article with someone who needs to read it, and check our CO₂ Term Glossary for any terms you came across.