ISO 14040 and 14044 life cycle assessment support for product claims that survive scrutiny.

What it is

What are ISO 14040 and ISO 14044, and what are they used for?

ISO 14040 and ISO 14044 are the two ISO standards behind life cycle assessment, usually shortened to LCA. They come from ISO technical committee TC 207, subcommittee SC 5, which is dedicated to LCA. ISO 14040 sets out the principles and the framework; ISO 14044 specifies the requirements and gives guidelines for carrying a study out. Both apply to full LCA studies and to narrower life cycle inventory studies. ISO 14040 itself says it does not describe the technique in detail or prescribe methods for each phase, which is why the two are always read together.

Organisations use LCA to find where a product's environmental burden really sits, to compare design options, to support environmental product declarations and to answer customers who ask for product-level data. The standards do not tell you what the answer should be. They tell you how to reach an answer that another expert can follow, check and trust.

Current editions. ISO 14040:2006, amended in 2020, and ISO 14044:2006, amended in 2017 and again in 2020, are the editions in force. ISO confirmed both in 2022 after systematic review. SC 5 has a task group working on a revision of the pair; no revised edition has been published, so studies started today follow the current editions with their amendments.

Who it is for

Who needs an ISO 14040 and 14044 life cycle assessment?

Nobody holds a certificate for these standards, so the question is who needs a study done to them. The organisations that come to Sterling for LCA support usually arrive with one of four prompts:

• A customer wants product-level environmental data. Large buyers increasingly ask suppliers for footprint and impact figures, and a study built to ISO 14044 gives them numbers with a documented method behind them.
• A tender or specification scores environmental performance. Bid teams need results that an evaluator can trace back to a stated scope, data sources and assumptions, not a single headline figure.
• A regulator, programme operator or market expects life cycle evidence. Declaration programmes and some product rules build on LCA, and a study that already follows the standards shortens the route.
• A parent company or group sets a common method. Group sustainability teams want every subsidiary to model products the same way, so results can be compared and rolled up.

If you plan to claim publicly that your product performs better than a competitor's, the study is a comparative assertion, and the standards call for critical review before disclosure.

Requirements

What are the main ISO 14040 and ISO 14044 requirements?

An LCA moves through four linked phases, with reporting and review wrapped around them. The list below gives the requirement areas both standards cover, in plain language and at title level; the detailed requirements sit in ISO 14044 and are checked during the study against the current edition and its amendments.

• Goal and scope definition: state why the study is done, for whom, the product system, its function, the functional unit and the system boundary.
• Life cycle inventory analysis (LCI): compile and quantify the inputs and outputs of the product system across its life cycle.
• Life cycle impact assessment (LCIA): translate the inventory into potential environmental impacts using selected categories and indicators.
• Life cycle interpretation: draw conclusions, test them for completeness, sensitivity and consistency, and state the limitations.
• Reporting: present results, data, methods, assumptions and limitations transparently for the intended audience.
• Critical review: have the study examined independently, which is required where comparative assertions are intended to be disclosed to the public.
• Limitations of LCA: recognise what the method cannot show and avoid claims it does not support.
• Relationship between the phases: keep the phases connected, so a decision or finding in one is reflected in the others.
• Value choices and optional elements: apply weighting and similar choices only under the conditions the standards set, and disclose them.

How it works

How is an ISO 14044 life cycle assessment carried out?

There is no audit and no certificate at the end. The route is a well-documented study, followed by an independent critical review where the intended use requires one. Sterling supports your team through the study; the reviewer's conclusions belong to the reviewer.

1. 01
   Fix the goal and scope.Agree the intended application, the audience, the functional unit, the system boundary and whether any public comparison is planned.
2. 02
   Gap assessment of data and practice.Map the data you hold against what the scope needs, identify gaps and assign owners for each data request.
3. 03
   Build the inventory.Collect primary data from sites and suppliers, select secondary datasets and record every allocation and cut-off decision.
4. 04
   Assess impacts and interpret.Apply the chosen impact method, run sensitivity and consistency checks and write conclusions that the data can carry.
5. 05
   Report and, where needed, commission critical review.Complete the report, then brief an independent reviewer you appoint and close the review comments with evidence.

Check the review route before you sign. ISO 14071:2024 sets out critical review processes and the competencies reviewers need, and it replaced the 2014 technical specification. Ask any proposed reviewer how their independence from the study team is assured and how their competence matches your product sector, and confirm what a declaration programme or customer will accept before the study begins.

Cost

What does an ISO 14040 and 14044 study cost?

An LCA has no standard price because the effort follows the product system. A single component made at one site differs sharply from a finished product with a long, international supply chain. Our proposals keep each component visible and hold the fee fixed for the agreed scope.

Timeline

How long does an ISO 14044 life cycle assessment take?

Data collection sets the pace far more than modelling does. Supplier responses, site metering and the availability of engineering staff decide how quickly the inventory fills. As an estimate, a first study for one product commonly takes three to six months; later studies move faster because the data routes already exist. A critical review adds its own rounds of comments and responses.

If a customer or programme has set a date, tell us at the outset. We will say plainly what the data allows and which decisions have to be made early to hold that date.

Your engagement

What your ISO 14040 and 14044 engagement includes

Sterling works through Sterling OS™. You choose one of two support levels: Design™, in which our consultants guide your own LCA team step by step, or Drive™, in which we manage the study programme with your people supplying data and decisions. Sustain™ keeps the study current as products, suppliers and data change, and Automate™ is Effivity, which holds the study's records.

• Goal, scope and study plan

  Intended use, audience, boundary and responsibilities agreed before data collection starts.

• Data collection routes

  Request templates for sites and suppliers, with data owners and dates tracked to completion.

• Effivity ISO & GRC software

  Study documents, data records and actions held in Effivity, included with the engagement at no additional cost.

• Training for your team

  Preferential Sterling Academy access, including complimentary awareness training for your people as part of the engagement.

• Report structure and quality checks

  A report layout that follows the standards, checked for completeness and consistency before release.

• Critical review preparation

  A review-ready file and support in answering the reviewer's comments.

Sterling does not certify, and does not carry out critical reviews; an independent reviewer you appoint examines the study and owns its conclusions.

Often combined with

Standards organisations pair with ISO 14040 / ISO 14044

• EMASEMAS registration explained: requirements, the validated environmental statement, the verifier and Competent Body route, cost factors and all-inclusive support.
• FSC and PEFC chain of custodyFSC and PEFC chain of custody certification and requirements: FSC-STD-40-004 V3-1, PEFC ST 2002:2020, the audit route and cost factors, with Sterling.
• GHG ProtocolGHG Protocol inventory consulting: scope 1, 2 and 3 emissions on boundaries and methods an outsider can test, ready for independent verification.
• ISCC PLUSISCC PLUS certification for circular and bio-based materials: requirements, mass balance, ISCC HUB registration, standalone documents and an all-inclusive plan.
• ISO 14001ISO 14001 certification consulting: aspects, impacts and compliance obligations controlled, with support until an accredited body certifies you.
• ISO 14005ISO 14005 implementation guidelines: build your environmental management system in phases, measure maturity and reach ISO 14001 certification at your own pace.