Scope 1, Scope 2, and Scope 3 emissions are the three categories of greenhouse gas (GHG) emissions defined by the Greenhouse Gas Protocol Corporate Standard, the internationally recognized framework for corporate emissions accounting. Scope 1 emissions refer to direct GHG emissions from sources owned or controlled by a company, such as combustion in company boilers or vehicles. Scope 2 emissions cover indirect emissions from the generation of purchased electricity, steam, heat, or cooling consumed by the company. Scope 3 emissions include all other indirect emissions occurring in a company’s value chain, both upstream and downstream, such as supplier activities, product use, and end-of-life disposal. This comprehensive guide compares these scopes side-by-side, explains their regulatory relevance under the Corporate Sustainability Reporting Directive (CSRD), the Corporate Sustainability Due Diligence Directive (CSDDD), and the Carbon Border Adjustment Mechanism (CBAM), and clarifies which emissions categories apply to your compliance obligations.
Key Differences Between Scope 1, Scope 2, and Scope 3 Emissions
The fundamental difference between Scope 1, Scope 2, and Scope 3 emissions lies in the source and control of emissions. Scope 1 emissions are direct and under the company’s operational control, making them the easiest to measure and manage. Scope 2 emissions are indirect but tied to purchased energy consumption, requiring companies to track energy sources. Scope 3 emissions are the broadest and most complex category, encompassing all other indirect emissions from the entire value chain, often representing 70–90% of a company’s total carbon footprint. Due to their complexity, Scope 3 emissions pose the greatest challenge for measurement, reporting, and mitigation.
From a regulatory perspective, CSRD (ESRS E1) mandates reporting on Scope 1, 2, and material Scope 3 emissions. The CSDDD requires companies to conduct due diligence on Scope 3 supply chain emissions, emphasizing responsibility beyond direct operations. Meanwhile, CBAM targets embedded emissions equivalent to Scope 1 emissions of imported goods’ production processes, focusing on carbon leakage prevention.
Comprehensive Comparison Table: Scope 1 vs Scope 2 vs Scope 3 Emissions
| Dimension | Scope 1 Emissions | Scope 2 Emissions | Scope 3 Emissions |
|---|---|---|---|
| Definition | Direct GHG emissions from owned or controlled sources (e.g., combustion in boilers, company vehicles, industrial processes) | Indirect GHG emissions from the generation of purchased electricity, steam, heat, or cooling consumed by the company | All other indirect emissions in the value chain, both upstream and downstream (15 categories defined by GHG Protocol) |
| Examples | Fuel combustion in company-owned vehicles, onsite manufacturing emissions | Electricity purchased from grid, steam or heat bought from third parties | Supplier emissions, product use-phase emissions, transportation, waste disposal |
| Measurement Complexity | Relatively straightforward; direct metering and fuel use data | Requires energy consumption data and emission factors for energy sources | Highly complex; requires data from suppliers, customers, and lifecycle assessments |
| Typical Share of Total Emissions | 10-20% | 5-15% | 70-90% |
| Regulatory Reporting Requirements | Mandatory under CSRD (ESRS E1), relevant for CBAM | Mandatory under CSRD (ESRS E1) | Mandatory reporting of material Scope 3 under CSRD (ESRS E1); due diligence under CSDDD |
| Compliance Deadlines | First CSRD reports due for fiscal year starting 1 January 2024 | Same as Scope 1 | Material Scope 3 reporting phased in; full due diligence obligations effective from 1 August 2024 under CSDDD |
| Penalties for Non-Compliance | Up to 5% of global annual turnover under CSRD | Same as Scope 1 | Up to 5% of global annual turnover plus potential civil liability under CSDDD |
| Enforcement Authorities | National competent authorities designated under CSRD | Same as Scope 1 | National judicial and administrative authorities under CSDDD |
| Applicability | All companies with operational control in the EU or exporting to EU under CBAM | All companies purchasing energy in scope of CSRD | Large companies with >250 employees or €40 million turnover, and high-risk sectors under CSDDD |
Where Scope 1, 2, and 3 Emissions Overlap and Diverge
Overlap: All three scopes are integral to comprehensive corporate GHG accounting and are required under the CSRD (ESRS E1) framework for sustainability reporting. Together, they provide a full picture of a company’s carbon footprint, enabling effective climate risk management and mitigation strategies.
Divergence: The scopes differ significantly in terms of control, data availability, and regulatory focus. Scope 1 emissions are under direct operational control and are subject to immediate mitigation actions. Scope 2 emissions depend on energy procurement choices and can be reduced by switching to renewable energy sources. Scope 3 emissions, covering upstream and downstream activities, require collaboration across the value chain and are the focus of due diligence obligations under the CSDDD. Additionally, CBAM targets embedded Scope 1 emissions in imported goods to prevent carbon leakage, not addressing Scope 2 or 3 emissions.
Which Emissions Scope Applies to You?
Your compliance obligations depend on your company size, sector, and activities within the EU or related to EU markets:
- Scope 1 and Scope 2 reporting is mandatory for all companies subject to the CSRD, including large EU companies and non-EU companies with significant EU operations.
- Scope 3 reporting is required under CSRD if emissions are material, typically when they represent a significant share of your footprint. Materiality assessments are guided by the ESRS E1 standard.
- Scope 3 due diligence obligations apply under the CSDDD to large companies with more than 250 employees or €40 million turnover, especially in high-risk sectors such as textiles, agriculture, and minerals.
- CBAM applies if you import goods into the EU that have embedded carbon emissions equivalent to Scope 1 emissions of their production process, such as steel, cement, and electricity-intensive products.
Understanding your company’s position relative to these scopes and regulations is critical to avoid penalties and reputational risks.
Truth Anchor: Under Regulation (EU) 2023/956, the CSRD requires companies to report on Scope 1, 2, and material Scope 3 emissions starting with fiscal years beginning on or after 1 January 2024. Non-compliance can result in fines of up to 5% of global annual turnover. The CSDDD, effective from 1 August 2024, mandates due diligence on Scope 3 supply chain emissions with similar penalty provisions.
Frequently Asked Questions
What is the main difference between Scope 1 and Scope 3 emissions?
Scope 1 emissions are direct emissions from sources a company owns or controls, such as fuel combustion on-site. Scope 3 emissions are all other indirect emissions in the value chain, including supplier activities and product use, making them broader and more complex to measure.
Are all companies required to report Scope 3 emissions under the CSRD?
No. Under CSRD (ESRS E1), companies must report on material Scope 3 emissions, meaning those that significantly impact their overall carbon footprint. Materiality assessments help determine which Scope 3 categories to report.
How does the CSDDD affect Scope 3 emissions reporting?
The CSDDD requires companies to conduct due diligence on Scope 3 supply chain emissions, focusing on identifying, preventing, and mitigating adverse human rights and environmental impacts linked to their value chains.
Does CBAM cover Scope 2 and Scope 3 emissions?
No. The Carbon Border Adjustment Mechanism (CBAM) targets embedded carbon equivalent to Scope 1 emissions in imported goods’ production processes to prevent carbon leakage, excluding Scope 2 and Scope 3 emissions.
What are the penalties for failing to report Scope 1 or Scope 3 emissions?
Under CSRD and CSDDD, penalties can reach up to 5% of global annual turnover for non-compliance, including failure to report or conduct due diligence on required emissions scopes.
Recommended Compliance Tools
To ensure full compliance with EU Green Deal regulations on emissions reporting and due diligence, use the following specialized tools:
- CSRD Emissions Reporting Tool – Streamlines reporting of Scope 1, 2, and material Scope 3 emissions in line with ESRS E1 standards.
- Scope 3 Emissions Due Diligence Tool – Supports compliance with CSDDD due diligence obligations on supply chain emissions.
- CBAM Compliance Tool – Helps calculate and report embedded Scope 1 emissions in imported goods under the CBAM regulation.
Clicking any link will take you to a dedicated compliance solution page where you can assess your company’s obligations, upload data, and generate official reports ready for submission to EU authorities.