ISO 14040 and ISO 14044 standards explained: life cycle assessment principles and framework

With increasing pressure from regulators and stakeholders like customers to show measurable progress on sustainability commitments, Life Cycle Assessments (LCAs) have become a vital tool for businesses. However, the quality of an LCA matters and not all LCAs are equal. The gold standard for robust and trustworthy LCAs are those that comply with the ISO 14040 and 14044 international standards.

In this blog, we’ll explore what the ISO 14040 and 14044 standards are, why they are so important, how they interact with other LCA standards and how they make sure that LCAs are accurate and credible.

What are the ISO 14040 and ISO 14044 standards for life cycle assessment?

Think of a Life Cycle Assessment (LCA, also called life cycle analysis) as a magnifying glass that allows you to examine a product’s environmental footprint throughout its life cycle, from raw material extraction to its final disposal. But how do you make sure your LCA is robust and credible? That’s where ISO 14040 and ISO 14044 come in. These internationally recognised guidelines are the gold standard for conducting LCAs and are essential for creating LCAs that stakeholders can trust.

• ISO 14040: This environmental management standard provides the foundational principles and framework for life cycle assessment (LCA). It defines what a product life cycle is and provides high-level guidelines for each phase of the LCA process, from setting goals and deciding the study’s scope to interpreting the results. Consider ISO 14040 as the foundation of the LCA process, ensuring a consistent approach.
• ISO 14044: Building on ISO 14040, this standard deep dives into how to conduct an LCA , with detailed requirements and guidelines for implementing each step of an LCA. It has criteria for topics including data quality, impact categories and how to report results which makes sure the LCAs are credible and reliable.

Together, these standards serve as a comprehensive guidebook on how to conduct robust LCAs. They are intentionally broad to ensure they are applicable across all sectors and they connect with other LCA standards tailored to specific purposes, such as using the LCA data to measure product carbon footprints.

While ISO 14040 and ISO 14044 are voluntary, following them improves the accuracy and credibility of your LCA. Third-party verification, although not mandatory in most cases, is strongly recommended. ISO 14044 does require a critical review when an LCA supports a comparative assertion disclosed to the public, for example, a claim that one product performs better than a competing one. This independent review confirms that your data collection, assessment methods and interpretation meet ISO standards, which helps build stakeholder trust and reduce the risk of greenwashing.

Why are the ISO 14040 / 14044 standards so important for compliance?

The short answer? They make your LCAs bulletproof.

Here’s how these standards accelerate your sustainability strategy:

Builds trust with stakeholders

ISO 14040 and 14044 provide a clear and consistent framework so they make sure your LCA results are accurate, transparent and comparable. This standardisation builds trust with stakeholders as it enables reliable product comparisons and helps reduce inconsistencies in reporting. These standards are your ultimate quality check, ensuring your LCAs are robust and aligned with global best practices.

Future-proofs your business

As sustainability regulations become more demanding, having LCAs that adhere to ISO 14040 and 14044 guarantees accurate, reliable data for reporting. This helps you avoid non-compliance which can lead to fines, reputational damage and loss of stakeholder trust.

Avoids greenwashing

Greenwashing is a hot topic in the sustainability world, as seen by the. EU’s Empowering Consumers Directive, which has applied to all consumer-facing environmental claims since 27 September 2026. ISO-aligned LCAs empower your marketing teams with robust data, allowing them to confidently promote your products’ sustainability benefits, make compliant green claims and protect your brand from greenwashing accusations.

Improves supply chain transparency

Supply chain transparency is a crucial component of any robust sustainability strategy. The ISO 14040 and 14044 standards provide detailed guidelines on measuring your product’s environmental impact throughout its life cycle (including its supply chain) and offer guidance on gathering information about your supplier’s environmental performance. By conducting LCAs that adhere to these standards, you ensure your understanding of your supply chains is comprehensive and accurate.

How do ISO 14040 / 14044 connect with other LCA standards?

ISO 14040 and ISO 14044 are the foundation of a broader ecosystem of LCA-related standards.

ISO 14040 and ISO 14044 standards provide the foundational principles, framework and guidelines for conducting LCAs. Building on these foundational standards are application-standard ISO standards that require LCAs to adhere to the ISO 14040 and ISO 14044 standards and provide guidance for specific applications of the LCA, such as creating Environmental Product Declarations (EPDs). Lastly, there are Product Category Rules which provide detailed, sector-specific instructions for conducting LCAs to make sure the LCAs are relevant to industry-specific needs.

Using the foundational ISO standards, application-specific ISO standards, and Product Category Rules (where applicable) helps ensure that your LCAs are robust, consistent, and tailored to your specific industry needs.

Below are the key standards that build on or connect to ISO 14040 and ISO 14044:

• ISO 14067 (Carbon footprint of products): Sets requirements for quantifying a product’s carbon footprint using LCA backbone. Product carbon footprints can then feed a company’s scope 3 inventory.
• ISO 14025 (Environmental Product Declarations): Offers a framework for using LCA data to create Environmental Product Declarations. See our EPD use case.
• ISO 14064 (Greenhouse Gas Accounting): ISO 14064-1 specifies how organisations quantify and report their greenhouse gas inventory, covering direct and indirect emissions (scope 1, 2 and 3). It is not an LCA standard itself, but it relies on life cycle data for its indirect emissions. Emissions from the goods a company buys, and from the use and end-of-life of the products it sells, are usually quantified with LCA-based product carbon footprints that follow ISO 14067 and, through it, ISO 14040 and 14044. This is how product-level LCA results roll up into a company’s carbon footprint.
• ISO 14068 (Carbon Neutrality): ISO 14068-1 sets requirements for claiming the carbon neutrality of an organisation or a product. It builds on the footprint standards above, ISO 14067 for products and ISO 14064-1 for organisations: emissions are reduced first, and only residual emissions are counterbalanced with carbon credits. In B2B communication, such as tenders or supplier questionnaires, it remains a recognised way to substantiate a claim. In B2C communication, the Empowering Consumers Directive has banned offset-based climate-neutral product claims since 27 September 2026.

The ISO 14040 / 14044 framework: product life cycle

So, how do the ISO 14040 and 14044 standards make sure LCAs are accurate and trustworthy?

One way is that these standards define a product’s life cycle as all consecutive, interlinked stages from raw material acquisition to final disposal. By following ISO 14040 and 14044’s definition of a product life cycle, you can be confident your LCAs are thorough and leave no blind spots.

In practice, these stages are commonly grouped into five:

1. Extraction and pre-processing of materials: Gathering the raw materials needed to produce a product. Key impacts include resource depletion, energy use and land degradation.
2. Processing and manufacturing of products: Converting raw materials into finished products. This stage is often energy-intensive and generates waste.
3. Distribution from suppliers and to consumers: Moving materials, semi-finished goods and final products across the supply chain. Key impacts include emissions from fuel use.
4. Usage of products: The phase where consumers use the product.
5. What happens after products have been used: The product’s end-of-life stage, whether it’s disposed of or recycled once used.

The ISO 14040 / 14044 framework: conducting an LCA according to ISO

Another key way ISO 14040 and 14044 ensure your LCAs are credible is by providing a detailed framework for how to conduct a life cycle assessment. Adhering to the steps outlined in these standards guarantees that your LCA is robust, reliable, and aligned with best practices.

These standards break the LCA process into four main steps:

1. Goal and scope definition: Determine which products to include in your LCA, set the goals and intended application, identify the target audience, and define the scope to align with your assessment objectives.
2. Inventory analysis: Collect and organise all input and output data throughout the product’s life cycle, ensuring data is well-structured for accurate environmental impact calculations in the next LCA steps.
3. Impact assessment: Conduct a Life Cycle Impact Assessment (LCIA) by selecting impact categories, classifying data, and calculating environmental impacts using standardised methodology.
4. Interpretation: The final step, the interpretation phase, is interpreting the LCA results by analysing data, understanding limitations, and creating actionable recommendations to make a positive environmental impact.

Interested to learn more about how to conduct an LCA? Read our blog here.

ISO 14040 / 14044 and Environmental Product Declarations (EPDs)

EPDs demonstrate how ISO standards are essential for using LCA data for environmental reporting. EPDs transparently report a product’s life cycle environmental performance using objective, comparable and third-party verified data.

To create an EPD, you must use LCA data that adheres to ISO 14040 and ISO 14044, the application-specific ISO 14025 standard and sector-specific Product Category Rules (PCRs) where relevant. EPDs are most established in construction, where several national schemes and public procurement rules already require them. In most other sectors they remain voluntary, but they are increasingly requested by B2B buyers, so having LCAs aligned to these ISO standards is a crucial step in creating EPDs.

At Root we allow users to upload data from EPDs because they use data from ISO 14040 and 14044 aligned LCAs. This ensures the EPD data is credible and robust so we feel confident using this data to create product and company-level footprints

We can help

Root creates comprehensive, ISO 14040 and 14044 aligned LCAs that help businesses accurately measure, reduce and communicate their company-wide and product-level footprints.

We aim to redefine the norm by making product footprints universal. Our platform conducts automated LCAs for entire product portfolios, helping businesses report effectively on regulations, avoid greenwashing and become industry leaders in sustainability.

Interested to learn more? Get in touch with our team to discover how Root can help you achieve compliance and drive sustainable growth.