Are Conflicts Of Interest Illegal In The UK? What Businesses Need To Know

Conflicts of interest come up in every growing business. Maybe a director is also running a side venture. Maybe your procurement manager’s “recommended supplier” is owned by a family member. Or maybe a contractor wants to work for you and your competitor at the same time.

It can feel awkward to raise, and even harder to know what’s actually allowed. The question we hear a lot from business owners is whether a conflict of interest is illegal in the UK.

The short (but very important) answer is: a conflict of interest isn’t automatically illegal - but how you handle it can quickly create legal risk. If it leads to a breach of duty, misuse of confidential information, bribery, fraud, or an unfair process, you can end up facing serious consequences.

Below, we’ll break it down in plain English so you can spot conflicts early, put the right safeguards in place, and protect your business from day one.

Is Conflict Of Interest Illegal In The UK?

A conflict of interest is generally not illegal by default in the UK.

A conflict of interest is usually a situation (not a crime) where someone’s personal interests could influence, or appear to influence, decisions they make for your business.

However, it becomes a legal issue when the conflict results in (or risks resulting in):

• Breach of duties (for example, a director acting in their own interests instead of the company’s)
• Breach of contract (for example, an employee breaching confidentiality obligations or agreed rules about outside work)
• Misuse of confidential information or trade secrets
• Bribery, fraud, or corruption (particularly around gifts, commissions, or secret benefits)
• Unfair procurement or selection processes that expose you to disputes, claims, or (in some sectors) scrutiny from customers, funders, or regulators

So, if you’re asking whether a conflict of interest is illegal, the practical takeaway for small businesses is this:

You don’t need to panic about the existence of a conflict - but you do need a process to identify, disclose, manage, and document it.

What Counts As A Conflict Of Interest In A Small Business?

Conflicts of interest can be financial, personal, or professional. They’re not always obvious, and they don’t always involve wrongdoing.

Here are common examples we see in SMEs:

1) Supplier And Procurement Conflicts

• A staff member selects a supplier owned by a friend, partner, or family member.
• A manager accepts hospitality that could influence a tender decision.
• A contractor recommends a vendor and receives a kickback or referral fee (without disclosure).

2) Side Businesses And Competing Work

• An employee runs a side business that competes with your services.
• A senior team member consults for a competitor while still working for you.
• A freelancer uses your project learnings to pitch another client in the same market.

3) Hiring, Promotions, And HR Decisions

• A manager is involved in hiring a close friend or relative (without a transparent process).
• A founder makes decisions about a relative’s salary, performance management, or promotion.
• An internal grievance is handled by someone who is personally close to one of the parties.

4) Director, Shareholder, And Investor Conflicts

• A director has a stake in a company you’re contracting with.
• A director uses company opportunities for personal gain.
• Founders disagree on whether a related-party deal is “good for the business”.

Conflicts like these can be manageable - but only if you set expectations early and handle disclosure properly. A well-drafted Employment Contract and clear workplace policies are often where this starts in practice.

When Does A Conflict Of Interest Become A Legal Problem?

A conflict becomes legally risky when it crosses the line from “competing interests” into breach, misconduct, or harm to the business.

Here are the most common legal pressure points for UK businesses.

Directors’ Duties Under The Companies Act 2006

If you run a limited company, directors owe statutory duties under the Companies Act 2006. Conflicts matter here because directors must act in a way that promotes the success of the company and avoid situations where their interests conflict with the company’s interests.

In many cases, directors can manage conflicts through disclosure and authorisation (for example, by following the company’s articles and board procedures). But if a conflict isn’t disclosed properly, it can lead to disputes, claims, or decisions being challenged.

In founder-led businesses, this often shows up as:

• Related-party transactions (your company paying another business you own)
• Using company resources for a private project
• Taking an opportunity that should have been offered to the company first

These issues are much easier to handle when your internal governance is clear, including having a tailored Company Constitution and decision-making rules agreed upfront.

Employment Law And Contract Breaches

For employees, a conflict of interest can become a legal issue if it breaches:

• their duty of fidelity (the implied obligation not to act against the employer’s interests)
• express contract terms (confidentiality, rules on secondary employment, or post-termination restrictions where enforceable)
• policies on gifts and hospitality, procurement, or relationships at work

This is why it’s so important not to rely on “common sense” alone. If you don’t clearly set expectations, it’s harder to enforce them later - and it becomes a lot messier if you need to investigate or discipline someone.

Where appropriate, it can also help to spell out how you handle sensitive information using a Confidentiality policy approach (particularly where staff have access to pricing, customer lists, IP, or strategy).

Bribery And Corruption Risks

Sometimes conflicts overlap with bribery risks - for example, if someone is receiving a hidden benefit for steering business to a particular supplier.

The Bribery Act 2010 is relevant here. It can apply where there’s bribery or a failure by a commercial organisation to prevent bribery by associated persons (employees, agents, and potentially contractors, depending on the relationship).

You don’t need to be a big corporation to be exposed. Small businesses can be vulnerable because processes are often informal, and one person might control supplier selection or approvals.

Data Protection And Confidential Information

Conflicts become especially risky when they involve data or confidential information. Common examples include:

• an employee emailing customer lists to their personal account before leaving
• a contractor reusing your assets, documents, or proprietary processes elsewhere
• sharing internal messages or information to support a personal dispute

Even if the conflict itself isn’t illegal, mishandling personal data can create separate compliance issues under the UK GDPR and Data Protection Act 2018. This is one reason businesses often build conflict processes into broader workplace governance and GDPR compliance practices.

How Do You Manage Conflicts Of Interest In Your Business (Without Overcomplicating It)?

Most conflict issues don’t require dramatic action - they require consistent process.

Here’s a practical way to manage conflicts of interest in a small business environment.

1) Define What You Mean By “Conflict Of Interest”

Start by setting a clear definition that covers:

• Actual conflicts (a direct competing interest)
• Potential conflicts (could become a conflict depending on future decisions)
• Perceived conflicts (looks like a conflict, even if it isn’t)

Perception matters because it affects trust in your processes, especially in hiring, procurement, and disciplinary decisions.

2) Require Disclosure (Early And In Writing)

You want people to tell you about conflicts early, not when something goes wrong. Your policy and contracts should encourage disclosure and make it clear that disclosure is not “an admission of guilt” - it’s part of professional conduct.

What you can ask them to disclose depends on the role, but it often includes:

• outside business interests
• relationships with suppliers, clients, or candidates
• financial interests in counterparties
• gifts, hospitality, commissions, or referral payments

3) Put A Plan In Place To Manage The Conflict

Once disclosed, your goal is to manage the risk (not punish the person). Common management steps include:

• removing the person from a particular decision (e.g. tender selection)
• requiring sign-off by another manager or director
• using a competitive process (e.g. multiple quotes)
• recording the rationale for decisions
• setting boundaries around information access

If the conflict is serious (for example, a director’s conflict involving a large related-party transaction), it’s worth getting legal advice early so you document authorisation properly and avoid later disputes.

4) Document It

Good documentation can save you a lot of pain later. You should record:

• the disclosure
• who assessed it
• what decision was made
• what safeguards were implemented

This is especially important where you might later need to justify a procurement decision, defend a process to investors, or explain why you acted fairly in an internal dispute.

5) Make It Part Of Your Culture (Not Just A Policy)

A conflict of interest policy only works if your team feels safe raising issues.

In practice, it helps to:

• talk about conflicts during onboarding and training
• remind managers to flag issues early
• apply your policy consistently (especially to senior staff and founders)

If you want a practical starting point, many businesses implement this through a written Conflict Of Interest policy that aligns with how you actually run your operations.

What Legal Documents And Policies Help Prevent Conflict Of Interest Disputes?

Conflicts are much easier to manage when your legal foundations are clear.

Here are the documents that commonly help small businesses prevent conflict issues from turning into disputes.

Employment Contracts And Contractor Agreements

For employees, a properly drafted contract can set expectations around:

• secondary employment and outside business interests
• confidentiality and IP ownership
• conflicts and disclosure requirements
• post-employment restrictions (where appropriate and enforceable)

This is where a tailored Employment Contract is often the cornerstone, supported by clear policies and a consistent onboarding process.

Shareholders Agreements (For Founder And Investor Scenarios)

In companies with multiple founders or outside investors, conflicts can become commercially sensitive very quickly.

A Shareholders Agreement can help set rules around:

• decision-making thresholds
• reserved matters (decisions requiring shareholder consent)
• director appointment and removal rights
• what happens if a founder has competing interests or wants to exit

It’s not about distrusting your co-founders - it’s about reducing ambiguity when pressure hits (fundraising, growth, disagreements, or exit opportunities).

Confidentiality Documents And Practical Controls

Where conflicts overlap with information misuse, written protections matter. Depending on your business model, that might include confidentiality clauses in employment/contractor agreements, plus operational controls like access restrictions and clear rules on data handling.

If your team frequently shares sensitive information, it’s also worth ensuring your workplace policies cover confidentiality clearly and consistently (because the risk often comes from informal habits rather than deliberate wrongdoing).

Board Minutes And Proper Approvals

For director conflicts, the “paper trail” is often the difference between a manageable issue and a major dispute. If a conflict is declared and managed, document it in board minutes and follow your constitution and governance processes.

It can feel like extra admin, but when you’re dealing with related-party transactions, it’s one of the simplest ways to protect the company and the individuals involved.

Key Takeaways

• A conflict of interest is not automatically illegal in the UK, but it can quickly become a legal issue if it leads to breaches of duty, contract, confidentiality, or bribery risks.
• If you’re wondering whether a conflict of interest is illegal, the real question is usually whether the conflict was disclosed, managed, and documented properly.
• Directors face additional obligations under the Companies Act 2006, and conflicts should be handled through clear governance, disclosure, and approvals.
• Employees and contractors can create conflict risks through side businesses, supplier relationships, and competing work - strong contracts and policies help set expectations early.
• A practical approach includes: defining conflicts, requiring disclosure, implementing safeguards (like removing someone from a decision), and keeping a written record.
• Solid legal foundations reduce disputes, including a tailored Employment Contract, a clear Conflict Of Interest policy, and (where relevant) a robust Shareholders Agreement.

Note: This article is general information only and isn’t legal advice. If you’d like advice on your specific situation, speak to a qualified solicitor.

If you’d like help putting the right documents and policies in place to manage conflicts of interest in your business, you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.