B Corp certification is a business certification run by the nonprofit B Lab. According to B Lab, it assesses and verifies a company’s social, environmental and governance impact against the B Lab Standards.
It is one of the ways a fashion label or any other company can show how it is run, and it sits within the wider field of ethical business standards, reporting and responsibility.
What B Corp certification is
B Lab describes the certification as an integrated business certification. The company, not an individual product, is what gets assessed. That is the main difference from labels that apply to a fabric, a garment or an ingredient. A shirt does not carry the certification; the business that sells it can.
The certification is built on the B Lab Standards, which B Lab calls a globally recognized framework that assesses a company’s social and environmental impact across areas ranging from climate action to human rights. On its certification page, B Lab also says the process is independently audited and verified by a third party, based on ISO 17021-1 requirements. That is an international standard for bodies that audit management systems.
B Lab also describes a movement around the certification. At the time of writing, it says on its certification page that the community unites over 10,000 companies on six continents. Readers who want to look at the community directly can use the company directory on B Lab’s own site, which is the right place to check whether a specific business is currently certified.
The seven impact topics the standards cover
The current B Lab Standards are organised in parts. B Lab calls the opening part the Foundation Requirements and the following part the Impact Topic Requirements. The performance requirements page says the impact topics cover seven social, environmental and governance areas, listed there as:
- Purpose and Stakeholder Governance, where companies act in accordance with a defined purpose and embed stakeholder governance in decision making.
- Climate Action, where companies take action to combat the climate crisis and its impacts.
- Justice, Equity, Diversity and Inclusion, covering inclusive and diverse workplaces and contributions to just and equitable communities.
- Government Affairs and Collective Action, where companies foster shared understanding and implement solutions toward an equitable, inclusive and regenerative economy.
- Fair Work, where companies provide good quality jobs and positive workplace cultures.
- Human Rights, where companies treat people with dignity and respect their human rights.
- Environmental Stewardship and Circularity, where companies demonstrate environmental stewardship and contribute to the circular economy in their operations and value chain.
For a clothing business, several of these topics map onto familiar problems. Fair Work and Human Rights relate to factory conditions and wages, while Environmental Stewardship and Circularity relate to materials, waste and product life. The standards themselves, not this summary, define what a company must actually do under each topic.
Foundation requirements before any scoring
The B Lab Standards page sets out the foundation steps. A company has to meet eligibility requirements, adopt the B Corp Legal Requirement and conduct a risk assessment. On eligibility, B Lab says a company must be legally incorporated, in operation for at least 12 months, and comply with local and national laws.
The risk assessment uses a tool from B Lab. It creates a risk profile that determines any additional due-diligence sub-requirements a company must meet, which links this certification to the practical questions covered in the guide to supply chain due diligence.
The legal requirement is about how a company is governed. B Lab’s legal requirements page says Certified B Corporations are legally required to consider the impact of their decisions on all of their stakeholders, a model it calls stakeholder governance. Those stakeholders are listed there as workers, communities, customers, suppliers and the environment, not just shareholders. How a company meets this depends on the country where it is incorporated, which is why B Lab provides a tool that shows the pathway by jurisdiction.
How the certification process works
According to the certification overview, B Corp certification starts with registering on B Impact, B Lab’s free sustainability tool, and beginning a self-assessment that measures current performance against the B Lab Standards. B Lab’s certification hub lays out the journey as a short sequence: initiate the journey with B Impact, review the requirements, begin the self-assessment and submit for a certification audit.
The audit step matters. The performance requirements page says the self-assessment is later independently verified and audited by a third party, so the claim a customer sees is not only the company’s own report on itself. The hub also lists supporting material for applicants, such as a document on audit and licence requirements, a scoping guide for deciding which parts of a business are included, and evidence guides with examples of documentation for each impact topic.
Companies differ in size, sector and industry, so the route differs too. B Lab calls a company’s route its track, and says requirements are tailored accordingly. It also describes an equity mechanism intended to make the standards fairly implemented in places where companies face unequal conditions. Fees, timelines and track details are set by B Lab and can change, so they are best read on B Lab’s current pages rather than in a summary like this one.
Standards update and what changed
The certification has changed in recent years. B Lab says on its certification page that in April 2025 it launched the biggest update to the B Lab Standards in its history, and that companies applying from 2026 will certify against V2.1 of the standards. Older descriptions of the certification, including articles that talk about an overall score, may therefore describe an earlier framework rather than the current framework. At the time of writing, B Lab’s own pages describe requirements organised by foundation and impact topic, and anyone comparing sources should check the date of whatever they are reading.
The certification hub also connects the new model to European law. B Lab says its third-party certification model aligns with the EU’s Empowering Consumers for the Green Transition Directive, which deals with environmental claims and sustainability labels. That is a reason the certification process now leans on independent verification.
Continuous improvement is built in as well. The performance requirements page says B Corps are expected to continuously improve their impact over a five-year period, so certification is described as an ongoing commitment and not a final result.
What the certification does and does not tell a shopper
For a shopper, the certification says something about the company behind a label: how it is governed, how it manages risks and whether an independent auditor has looked at its practices. It does not certify that a particular garment is made from a particular fibre, that a given supplier pays a particular wage, or that every product is free of environmental harm. Those questions belong to product-level and supplier-level schemes, such as the labelling covered in the guide to fair trade labels and premiums.
B Lab itself frames the certification as a signal. Its overview says certifying signals to customers, employees and investors that a company is committed to responsible business practices. A signal is useful but not a guarantee, so a sensible reader treats it as an input alongside a company’s own reporting, other certifications and independent reporting. This site is independent and is not affiliated with B Lab or any certified company, and this article is general information, not legal or compliance advice.
For small fashion businesses weighing the certification, the practical question is whether the effort fits their stage. B Lab’s pages say requirements vary by track, so a useful starting point is to read the current standards, the legal requirement for the country of incorporation and the free self-assessment tool before deciding.
Frequently asked questions
Is B Corp the same as a benefit corporation?
No. A benefit corporation is a legal form in some jurisdictions, while B Corp certification is awarded by B Lab. B Lab’s legal requirements page explains how the legal requirement is met depending on where a company is incorporated.
Does B Corp certification apply to products?
It applies to the company. B Lab’s overview describes it as a certification of a company’s impact, not a mark that verifies an individual product.
Who can apply?
B Lab’s standards page says a company must be legally incorporated, in operation for at least 12 months, and comply with local and national laws, then meet the other foundation requirements.
Is the certification checked by anyone outside the company?
Yes. B Lab’s certification page states that an outside auditor verifies the company’s self-assessment, using the ISO 17021-1 audit standard as the basis.
