Carbon Pricing: How It Works and How It Cuts CO2e Emissions

Last updated: 23 October 2026

What is carbon pricing?

Carbon pricing is a policy that charges emitters for each tonne of carbon dioxide equivalent (CO2e) they release. It makes the polluter pay for the damage emissions cause, a cost that would otherwise fall on everyone else.

Economists call that hidden damage an externality. Once it has a price, companies weigh it like any other cost. They can pay it, or invest to emit less. Carbon prices are set per tonne of CO2e, so methane, nitrous oxide and F-gases are usually covered alongside CO2.

What are the main types of carbon pricing?

The two main types are carbon taxes and emissions trading systems. Governments also use crediting schemes and border adjustments, and many companies set an internal carbon price.

Sources: World Bank Carbon Pricing Dashboard; ICAP Status Report 2026; European Commission, CBAM.

A tax gives a known price but an uncertain cut in emissions. A cap gives a known cut but a price that moves with the market. For where each one applies, see where carbon is taxed.

How much of the world is covered by carbon pricing?

Just over 29% of global greenhouse gas emissions were covered by a direct carbon price in 2026, across 87 policies. That is up from 23% in 2023, according to the World Bank's State and Trends of Carbon Pricing 2026 (May 2026).

The average hides a wide range. Prices run from a few dollars a tonne in some Asian and Latin American schemes to more than US$100 in parts of Europe. Check the World Bank Carbon Pricing Dashboard for current prices by scheme.

How does carbon pricing reduce CO2e emissions?

Carbon pricing cuts emissions by changing what is cheapest. When each tonne has a cost, it becomes worthwhile to burn less fuel, switch to cleaner energy, change processes or buy lower-carbon materials.

• Power: a carbon price raises the cost of coal and gas generation compared with renewables, which shifts investment toward clean power.
• Heavy industry: steel, cement and chemicals makers are pushed toward efficiency, fuel switching, electrification and, in time, carbon capture.
• Buildings and transport: where fuels are priced, as under the EU's planned ETS2 for buildings and road transport from 2028, heating and vehicle choices change.
• Public revenue: governments can spend carbon revenue on the transition or return it to households. The World Bank reports that over half of carbon pricing revenue was earmarked for environmental, infrastructure and development spending (State and Trends 2025).

A carbon price works best alongside other policies, such as efficiency standards, clean energy support and disclosure rules. It isn't a complete answer on its own.

How does carbon pricing affect businesses?

Carbon pricing affects businesses directly, through the tax or allowances they pay on their own emissions, and indirectly, through higher prices for energy and materials.

• Direct cost (Scope 1): covered facilities pay on the emissions they produce.
• Pass-through cost (Scope 2 and 3): power companies and suppliers pass part of their carbon cost on in electricity tariffs and material prices.
• Trade cost: exporters of steel, aluminium, cement, fertilisers, hydrogen and electricity to the EU face CBAM charges on the emissions in their goods.
• Opportunity: companies with lower-carbon products can win on price once competitors carry a carbon cost.

Worked example: what a carbon price costs

These numbers are made up to show the method. They are not real data.

A plant emits 200,000 tCO2e of Scope 1 emissions a year. It pays a carbon tax of US$30 per tonne, with no free allowance.

The same cut is worth twice as much when the price doubles. Prices in many schemes are set to rise, Singapore's for example, so it pays to cost reduction projects against future prices, not just today's.

What are the challenges of carbon pricing?

The main challenges are carbon leakage, fairness and getting the price right.

• Carbon leakage: production may move to places with no carbon price. Border adjustments such as CBAM, and free allowances for exposed industries, are the main responses.
• Fairness: higher energy prices hit low-income households hardest unless revenue is recycled. The International Monetary Fund has written about this risk.
• Price level: many prices are still below what climate goals need, and some schemes give most allowances away for free.
• Data: a price is only as good as the emissions data behind it. Regulators increasingly want verified figures.

Terrascope customer example: assured emissions data

Carbon costs and border charges are paid on reported emissions, so the data has to stand up to audit. Dyno Nobel used Terrascope to get 1.6 million tCO2e externally assured.

How Terrascope helps

Terrascope gives you the verified emissions data that carbon prices are charged on, and shows how much different cuts would save.

• Know what you'd pay: the Terrascope carbon footprint platform measures Scope 1, 2 and 3 emissions by site and source, with an audit trail.
• Report to regulators: Terrascope climate reporting supports disclosure and CBAM emissions data for exported goods.
• Model the savings: compare reduction scenarios against your targets and carbon costs with Decarbonise with AI.

Want to know what better carbon data is worth to your business? Try the carbon management ROI calculator.

FAQs

What is carbon pricing in simple terms?

Carbon pricing makes companies pay for the greenhouse gases they emit, per tonne of CO2e. It is done through a carbon tax, where the government sets the price, or an emissions trading system, where the government caps emissions and the market sets the price.

Does carbon pricing actually reduce emissions?

Yes. Studies of schemes such as the EU ETS have found emissions cuts in covered sectors compared with what would have happened without them. The size of the cut depends on the price level, coverage and other policies running alongside it.

What is the difference between a carbon tax and cap-and-trade?

A carbon tax fixes the price per tonne and lets the amount of emissions vary. Cap-and-trade fixes total emissions and lets the price of allowances vary with the market. Some countries use both.

How much of the world has a carbon price?

According to the World Bank's 2026 report, 87 direct carbon pricing policies cover just over 29% of global greenhouse gas emissions. Coverage has grown fast in middle-income economies, with notable progress in India and Vietnam.

Do carbon prices apply to Scope 3 emissions?

Not directly. Carbon prices are charged on direct emissions from covered facilities or fuels. But suppliers pass costs down the chain, and CBAM charges importers for the emissions in their goods. So Scope 3 emissions often carry a carbon cost indirectly.

What is an internal carbon price?

An internal carbon price is a cost per tonne that a company applies to its own decisions, such as new plants or sourcing. It helps the company prepare for future regulation and compare low-carbon options on equal terms.