Life Cycle Assessment vs ESG: Roles, Differences, and Complementarity in Sustainability Reporting
Tashit Talwar
Sustainability increasingly influences business strategy, investment decisions, and policy development. Life Cycle Assessments (LCAs) and Environmental, Social, and Governance (ESG) frameworks are often referenced together in sustainability discussions, which has led to them being used interchangeably. In practice, this has blurred the distinction between measurement tools and reporting frameworks.
LCA is a methodological tool used to measure environmental impacts. At the same time, ESG is a framework used to evaluate broader corporate performance across environmental, social, and governance dimensions. Confusion arises because both are applied to sustainability decision-making, even though they serve different purposes and operate at various organisational levels (Varbanov et al., 2024)
To clarify these distinctions, the table below compares how LCA and ESG differ across key dimensions such as purpose, scope, system boundaries, and use cases.
| Aspect | LCA | ESG |
|---|---|---|
| Purpose | Measures the environmental impacts of a product, material, building, or process. | Evaluates an organisation's overall sustainability across environmental, social, and governance dimensions. |
| Type of Tool | Scientific, standardised, quantitative assessment | Standardised reporting and governance frameworks using qualitative and quantitative indicators |
| Scope | Environmental impact | Environmental, social and governance impacts |
| System Boundaries | Uses defined system boundaries (cradle-to-gate or cradle-to-grave), which cover life-cycle modules, A1-A3 (upstream), A4-A5 (core/construction), B1-B7 (use phase), and C1-C4 (end-of-life stage). | Uses organisational reporting boundaries based on Scope 1 (direct), Scope 2 (energy), and Scope 3 (value-chain) emissions. |
| Emission Categories | Global Warming Potential (GWP), Acidification Potential (AP), Eutrophication Potential (EP), Ozone Depletion Potential (ODP), and other environmental impact categories | Greenhouse gas (GHG) emissions, typically reported as Scope 1, Scope 2, and Scope 3 |
| Standards used | ISO 14040, ISO 14044 (ISO, 2006a, 2006b) | GRI, ISSB/SASB, TCFD/TNFD, BRSR (BRSR, 2024; GRI, 2021; IFRS, 2022; SASB, 2022; TCFD, 2021; TNFD, 2025) |
| Use Cases | Material selection, product comparison, eco-design, hotspot analysis, and investor communication. | Investor communication, risk assessment, compliance, and strategy building. |
How LCAs strengthen ESG reporting
Most ESG frameworks require organisations to disclose product-related impacts and value-chain emissions, but do not prescribe detailed calculation methodologies. Reporting boundaries also vary depending on the chosen ESG standard. LCAs help address this gap by providing a standardised, science-based method for quantifying environmental impacts across a product’s or building’s life cycle.
LCA directly strengthens the Environmental (E) pillar of ESG reporting by providing quantified data that can be mapped to commonly used disclosure standards. The alignment with GRI 302 (Energy) and GRI 305 (Emissions) illustrates this relationship.
- GRI 302 (Energy) – Scope 1 and Scope 2: LCAs help quantify energy consumption across manufacturing or construction processes, including on-site fuel use associated with Scope 1 and purchased electricity or heat associated with Scope 2. For example, the LCA of a product can show how much energy is used to produce one unit of the product, which can then be directly reported under the GRI 302 standard of the Global Reporting Initiative.
- GRI 305 (Emissions) – Scope 1, Scope 2 and Scope 3: LCA quantifies greenhouse gas emissions across cradle-to-gate or cradle-to-grave life-cycle stages, making it particularly valuable for estimating Scope 3 emissions. For example, an LCA can calculate the carbon emissions from raw material extraction to end-of-life stages, enabling consistent reporting of Scope 3 emissions under the GRI 305 standard, alongside Scope 1 and Scope 2 (Kasperzak et al., 2023).
When appropriately scoped and transparently reported, LCAs support environmental claims with scientifically grounded data and recognised standards, reducing the risk of unsubstantiated or misleading sustainability claims (De Salles, 2025).
In essence, LCA and ESG are complementary approaches to sustainable business transformation rather than competing instruments. While ESG offers the strategic framework for accountability, reporting, and decision-making, LCA provides the scientific foundation, including data, measurements, and impact assessments. When combined, they enable a shift from high-level sustainability commitments to quantifiable and verifiable environmental performance. By integrating life cycle assessment (LCA) into ESG disclosures, companies can strengthen credibility, better manage environmental risks, and align corporate goals with stakeholder expectations and international sustainability requirements.
Resources
Ana Claudia Nioac De Salles, & Peter Brantsch. (2025). How Life Cycle Assessment Supports Sustainability Reporting: Example from Clean Aviation. Engineering Proceedings 2025, Vol. 90, Page 56, 90(1), 56. https://doi.org/10.3390/ENGPROC2025090056
BRSR. (2024). Sustainability & Business Responsibility & Sustainability Reporting(BRSR) Background Material on Sustainability and Business Responsibility and Sustainability Reporting (BRSR) (Revised Edition 2024).
GRI. (2021). GRI – Universal Standards. https://www.globalreporting.org/standards/standards-development/universal-standards/
IFRS. (2022). IFRS – ISSB communicates plans to build on SASB’s industry-based Standards and leverage SASB’s industry-based approach to standards development. https://www.ifrs.org/news-and-events/news/2022/03/issb-communicates-plans-to-build-on-sasbs-industry-based-standards/
ISO. (2006a). ISO 14040:2006 – Environmental management — Life cycle assessment — Principles and framework. ISO. https://www.iso.org/standard/37456.html
ISO. (2006b). ISO 14044:2006 – Environmental management — Life cycle assessment — Requirements and guidelines. ISO. https://www.iso.org/standard/38498.html
Kasperzak, R., Kureljusic, M., Reisch, L., & Thies, S. (2023). Accounting for Carbon Emissions—Current State of Sustainability Reporting Practice under the GHG Protocol. Sustainability 2023, Vol. 15, Page 994, 15(2), 994. https://doi.org/10.3390/SU15020994
SASB. (2022, February 4). ESG Integration Insights – 2021 Edition – SASB. SASB. https://sasb.ifrs.org/knowledge-hub/esg-integration-insights-2021-edition/
TNFD. (2025, May). Taskforce on Nature-related Financial Disclosures (TNFD) Recommendations – TNFD. TNFD. https://tnfd.global/publication/recommendations-of-the-taskforce-on-nature-related-financial-disclosures/
TCFD. (2021). Task Force on Climate-related Financial Disclosures Implementing the Recommendations of the Task Force on Climate-related Financial Disclosures Implementing the Recommendations of the Task Force on Climate-related Financial Disclosures i.
Varbanov, P. S., Zeng, M., Van Fan, Y., Wang, X., Peng Ngan, S., Lin Ngan, S., & Loong Lam, H. (2024). Chemical Engineering Transactions: A Holistic Approach to Sustainability Reporting: Integrating Social and Governance Dimensions in Life Cycle Assessment. https://doi.org/10.3303/CET24114009