More than ever, businesses are expected to demonstrate purpose beyond profit. For growth-stage businesses, B Corp certification can strengthen brand, talent and investor conversations, but it also requires governance commitments and internal buy-in.
But B Corp certification involves more than completing an impact assessment. It requires legal changes to your company’s constitution, alignment of governance practices, and careful planning to meet evolving standards. Getting these steps right from the outset can help you avoid delays, ensure compliance and unlock the full benefits of B Corp status.
In this guide, we explain what the B Corp legal requirements are, how the process works, and where expert legal support can make all the difference.
Our corporate lawyers can help you meet the legal requirements for B Corp certification and ensure your business is structured for long-term ESG success.
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How do you become a B Corp?
In the UK, B Corp is a certification rather than a separate company type. Becoming certified involves a combination of impact assessment, governance changes, and ongoing compliance.
The process is usually easier to manage in four stages:
Assessment and gap analysis.
Businesses typically begin with the B Impact Assessment and use it to identify areas for improvement. Under the historic framework, companies have needed to reach 80 points to certify, but B Lab has introduced new standards and a new certification model, so businesses should check at the outset which route applies to them.
Legal commitment.
Businesses seeking certification must adopt B Lab’s current legal wording for the relevant entity type. For many UK companies limited by shares, that means amending the Articles of Association. For LLPs and some other structures, the equivalent change is made in the partnership agreement or other governing document. Businesses with 0-49 full-time employees generally need the legal change in place before certification. Larger UK limited companies may have up to 12 months after certification, and LLPs 90 days, depending on structure and scope.
Verification and fees.
Once the assessment is submitted, it moves into review and verification. Fees are tiered by revenue and may include submission, verification and annual certification charges.
Ongoing compliance.
Certification is not a one-off exercise. B Corps are expected to continue reporting on impact and to recertify periodically. Businesses certifying in 2026 should also expect the new standards and third-party assurance model to shape the process
The process often takes months rather than weeks, especially where board approvals, shareholder consents or wider governance updates are needed.
Is B Corp certification right for your business?
B Corp certification is often most valuable for businesses that want to formalise an existing commitment to purpose, strengthen governance and use the credential in investor, client or talent conversations. It can be especially relevant where leadership wants to embed stakeholder thinking more clearly into decision-making.
That said, certification is not a light-touch badge. It usually requires internal evidence-gathering, leadership alignment and legal work to ensure constitutional documents and shareholder arrangements support the commitment in practice. For some businesses, the right question is not simply how to certify, but whether the governance commitment and ongoing reporting expectations fit the way the business is run.
For more on this, read our article on the advantages and disadvantages of B Corp certification.
The B Corp legal requirements
Achieving B Corp certification requires more than a general commitment to social and environmental responsibility. For UK companies, it usually means embedding B Lab’s mission-aligned wording in the Articles of Association or other relevant governing documents, and making sure governance arrangements support that commitment in practice.
Key changes commonly include:
- Purpose wording: the company’s constitutional documents need to reflect a commitment to creating a material positive impact on society and the environment.
- Stakeholder decision-making: directors are expected to take account of stakeholder interests when making decisions.
- Governance alignment: board processes and internal governance should support the commitments being made.
UK directors already owe duties to the company and must have regard to wider stakeholder factors under section 172 of the Companies Act 2006. The B Corp legal requirement builds on that by embedding a clearer stakeholder commitment in the company’s constitutional documents and governance framework.
In practice, this can affect board meetings and decision-making. Businesses should be able to show that stakeholder impact has been considered in a meaningful way, and governance policies may need updating so that the legal wording is reflected in day-to-day decision-making.
Companies should also review shareholder agreements and related governance documents to make sure they align with the amended articles and do not cut across the company’s stakeholder commitments. This is often particularly important where there are outside investors, bespoke veto rights or future funding plans.
In some cases, businesses may need to:
- obtain shareholder approval for constitutional changes;
- brief incoming investors on the company’s stakeholder commitments;
- review provisions affecting governance, exits or profit distribution.
For a UK private limited company, amending the Articles of Association is usually done by special resolution. In practice, that ordinarily means at least 75% of the votes cast. Copies of the special resolution and amended articles must then be filed at Companies House within 15 days. If the change alters the company’s objects, an additional filing may also be needed. Businesses with fewer than 50 employees generally need the legal requirement in place before certification, while some larger entities are given additional time depending on structure.
Beyond the constitutional changes, businesses also need to plan for the ongoing obligations that come with certification, including impact reporting and recertification.
The legal transition can be more involved for businesses with multiple shareholders, bespoke governance arrangements or limited internal resource. Legal support is often most useful in:
- drafting and reviewing constitutional amendments;
- checking shareholder agreements and related governance documents;
- aligning board approvals and governance processes with the certification timetable;
- reducing the risk of delay or inconsistency later in the process.
Do I need a lawyer to become B Corp certified?
Technically, no. But whether legal advice is sensible depends on the complexity of your company’s structure and governance. If you have multiple shareholders, outside investment, bespoke articles or limited internal governance capacity, getting the legal work wrong can create delay or problems later on.
The legal changes required are not just a formality. Businesses need to use the current B Lab legal wording that applies to them and make sure it fits with their existing constitutional documents, shareholder arrangements and approval process.
A lawyer can help by:
- redrafting the Articles of Association or equivalent governing documents;
- reviewing shareholder agreements and related corporate documents;
- making sure governance processes support the commitments being made;
- helping the business align legal changes with the wider certification timetable.
Legal advisers will not usually complete the B Impact Assessment for you or manage the entire certification relationship with B Lab. Your team will still need to coordinate evidence, handle the assessment and respond during verification.
For straightforward owner-managed businesses, legal advice may be limited. For businesses with investors, multiple classes of shares, group structures or wider governance changes, it is often worth taking advice early.
When should you take legal advice during the B Corp process?
Legal input is usually most useful where certification overlaps with wider corporate change, for example amending articles, reviewing shareholder arrangements, preparing for investment, or aligning board approvals with the certification timetable. That is often where avoidable delay arises.
If your business is already working through a funding round, group reorganisation, exit planning or governance refresh, it usually makes sense to address the B Corp legal requirement as part of the same exercise rather than as a standalone amendment.
If B Corp certification is on your agenda, our corporate lawyers can help you assess the legal work involved and support the changes needed for a smoother certification process.
