UK Director Fiduciary Duties: What Directors Must Do and Avoid

If you run a small company in the UK, being a “director” isn’t just a title on Companies House or a line in your email signature.

It comes with legal responsibilities that can personally affect you, even when you’re operating through a limited company. And a big part of that responsibility is understanding director fiduciary duties in the UK and the wider directors’ duties you’re expected to follow.

In plain English, fiduciary duties are the duties you owe to your company because you’re in a position of trust. They’re designed to make sure directors act for the benefit of the company (rather than for themselves, or for someone else).

Below, we’ll break down what director fiduciary duties mean in practice, the key legal duties under UK law, what to avoid, and the steps you can take to stay compliant (without turning every decision into a legal headache).

What Are Director Fiduciary Duties In The UK?

In the UK, a director’s fiduciary duties are obligations that arise because you’re managing the company’s affairs and exercising powers that can materially impact the company, its shareholders, and (in some cases) its creditors.

They’re called “fiduciary” because the law expects you to:

• act in good faith for the company’s benefit (not your personal benefit);
• avoid conflicts between your personal interests and your company’s interests; and
• use company powers properly, for the purpose they were given.

For most small businesses, the day-to-day reality is simple: you can’t treat the company like your personal wallet, you can’t quietly steer business to your mate’s company for a kickback, and you can’t make major decisions without considering what’s best for the company.

Even where you’re the only director and the only shareholder, these duties still matter. The company is a separate legal entity, and your role as director comes with legal guardrails.

Where Do These Duties Come From?

The main source is the Companies Act 2006, which sets out a core set of statutory directors’ duties. These duties reflect (and largely replace) older common law fiduciary principles, but the underlying idea is the same: you’re trusted with the company’s power, so you must use it responsibly.

There can also be extra duties in:

• your company’s constitution (often its Company Constitution);
• a Shareholders Agreement (especially where there are multiple owners); and
• director service agreements and internal policies.

The Core Directors’ Duties Under The Companies Act 2006

If you’re focused on complying with director fiduciary duties in the UK, start here. The Companies Act 2006 sets out seven general duties. We’ll translate them into practical, small-business terms.

1) Act Within Your Powers

You must act within the powers given to you by the Companies Act and your company’s constitution.

In real life, this often means:

• checking what your Articles say you can do as a director;
• following any decision-making rules (for example, when shareholder approval is needed); and
• not making “director decisions” that you legally don’t have authority to make.

If you’ve got co-founders or outside investors, the boundaries are often stricter - which is why making sure your Shareholders Agreement is clear can save a lot of disputes later.

2) Promote The Success Of The Company

This is the headline duty most people think of when they hear about fiduciary duties of directors in the UK. You must act in the way you consider (in good faith) would promote the success of the company for the benefit of its members (usually shareholders).

When making decisions, the law says you should have regard to factors like:

• the long-term consequences of decisions;
• employees’ interests;
• relationships with suppliers and customers;
• the impact on the community and environment (where relevant); and
• maintaining a reputation for high standards of business conduct.

This doesn’t mean you must always choose the “nicest” option. It means you should make rational, good-faith decisions aimed at the company’s success - and be able to explain your reasoning if questioned.

3) Exercise Independent Judgement

You can take advice and listen to others (you should), but you can’t simply rubber-stamp decisions because someone else told you to.

This is particularly relevant if:

• a dominant shareholder tries to direct you;
• a parent company is “telling” the subsidiary director what to do; or
• a lender or strategic partner pressures you into certain decisions.

You’re allowed to act in accordance with an agreement the company has entered into - but you still need to consider whether the action is appropriate and lawful for the company.

4) Exercise Reasonable Care, Skill And Diligence

This duty is a blend of an objective standard (what a reasonably diligent person would do) and a subjective standard (what you should do, given your knowledge and experience).

For small business directors, this means:

• reading what you sign (even when you’re busy);
• keeping an eye on cashflow and tax obligations;
• asking questions when something doesn’t make sense;
• making sure key compliance tasks are actually happening (not just “someone said they’d handle it”).

Good governance doesn’t need to be complicated. Simple habits like documenting key decisions and getting professional advice early can go a long way.

5) Avoid Conflicts Of Interest

You must avoid situations where you have (or could have) a direct or indirect interest that conflicts with the company’s interests.

Common conflict scenarios include:

• you own (or your spouse owns) a supplier the company wants to use;
• you’re a director of two businesses competing for the same customers;
• you’re planning a “side project” that overlaps with the company’s business model.

If your company grows, it’s worth having a written Conflict Of Interest Policy so everyone understands what needs to be disclosed, when approvals are required, and how conflicts are managed.

6) Not Accept Benefits From Third Parties

This is an anti-bribery style duty: you must not accept a benefit from a third party that’s given because you’re a director (or because you do / don’t do something as a director).

It can include obvious things like cash payments, but also less obvious “benefits” like:

• free services;
• discounts not available to the public;
• hospitality that crosses the line into influence; or
• business opportunities offered to you personally that should belong to the company.

7) Declare Interests In Proposed Transactions Or Arrangements

If the company is entering into a transaction and you have an interest in it, you must declare it to the other directors.

This could be as straightforward as:

• the company renting premises you personally own;
• the company buying equipment from your family member;
• the company hiring your friend’s agency and you getting a referral fee.

Disclosure alone may not be enough - depending on the facts, the conflict may need to be authorised, and the company’s constitution may set out the process for that.

How Do These Duties Apply Day-To-Day In A Small Business?

Most directors aren’t making dramatic boardroom decisions every day. You’re probably juggling sales, hiring, product delivery, suppliers, and finance - and you’re making fast decisions constantly.

So, what does compliance with directors’ fiduciary duties in the UK look like on a practical level?

Keep Your Governance Simple (But Real)

You don’t need to run a “big corporate” process, but you do need basic structure.

• Hold director meetings when decisions are significant (new loans, large contracts, hiring senior staff, acquisitions, issuing shares).
• Record decisions in writing (minutes or a written resolution).
• Know when shareholder approval is needed (this is where your Articles and shareholder arrangements really matter).

When you need to document a decision properly, a Directors Resolution Template can help keep the process clean and consistent.

Separate “Director You” From “Shareholder You”

This is a big one for owner-managed companies.

As a shareholder, you’re entitled to benefit from the company (for example, through dividends, growth in value, or selling shares). But as a director, you must make decisions in the company’s interests and within your powers.

They overlap - but they’re not identical roles. Keeping that distinction in mind helps you avoid conflicts and “informal” decisions that can later be challenged.

Be Careful With Delegation

You can delegate tasks, but you generally can’t delegate responsibility. If you’re the director, regulators, creditors, and courts will often look at what you did (or didn’t do) to oversee the business.

If you’re hiring staff, make sure the relationship is properly documented and expectations are clear - an Employment Contract is one of those “from day one” documents that helps prevent disputes and confusion.

What Company Directors Must Avoid (Common Breaches And Risky Behaviour)

It’s often easier to understand directors’ fiduciary duties in the UK by looking at what not to do.

Using Company Money As Personal Money

Even if you own 100% of the company, company funds are not your personal funds.

Risky behaviours include:

• paying personal expenses from the company account without proper recording;
• taking informal “loans” from the company without documentation;
• treating company assets (vehicles, equipment, IP) as personally owned.

Aside from fiduciary duty issues, this can create tax problems and director’s loan account issues. This article isn’t tax or accounting advice, so if you’re unsure how to record or structure something, get advice from a qualified accountant and a solicitor early.

Entering Into Deals Where You’re On Both Sides

Related party transactions aren’t automatically prohibited, but they’re a classic source of conflict of interest issues. If you’re personally interested in a deal, you typically need to disclose it and follow the authorisation process.

Where there are multiple directors or shareholders, these deals can quickly become flashpoints for disputes if they weren’t handled transparently.

Not Keeping Records (Or “Backdating” Decisions)

When something goes wrong - a dispute with a co-founder, a creditor claim, a tax audit - the question becomes: “What did the director decide, and why?”

If you can’t show your reasoning or approvals, it’s much harder to defend your position. And trying to “fix” that after the event (for example, by backdating minutes) can create bigger problems.

Ignoring Professional Advice When It’s Clearly Needed

Directors don’t need to be lawyers or accountants, but you do need to recognise when an issue is beyond everyday business judgment.

High-risk moments include:

• signing long-term supply or distribution agreements;
• bringing on investors or issuing shares;
• entering into personal guarantees;
• selling or buying a business;
• restructuring, redundancies, or major changes to working arrangements.

It’s almost always cheaper to get advice before you sign than to fix it after a dispute.

Special Situations: Insolvency Risk, Creditor Duties, And Signing Contracts

Most discussions about fiduciary duties focus on “company vs director” or “shareholders vs directors”. But there are a few situations where the legal risk jumps significantly for small business directors.

When The Company Is In (Or Near) Financial Trouble

When a company is solvent, directors generally act to promote the company’s success for the benefit of shareholders. However, if the company is insolvent, or insolvency is probable, directors may need to give increasing weight to creditors’ interests - and in some circumstances those interests can become the priority.

Exactly when that shift happens depends on the facts (and can be legally complex), so if your company is under serious financial pressure, it’s important to get advice early.

Practically, if your company is struggling to pay debts as they fall due, you should:

• get advice early (legal and insolvency advice);
• monitor cashflow closely and document decisions;
• avoid taking actions that worsen creditor losses (for example, paying one creditor while ignoring others without a proper basis);
• avoid taking on new obligations the company can’t realistically meet.

Leaving it too late can create personal exposure and potential disqualification risks, depending on what happens next.

Signing Contracts And Deeds The Right Way

Many directors accidentally create risk by signing documents incorrectly, or signing documents they don’t fully understand (especially deeds, guarantees, and documents with personal liability).

If your business needs to execute a document as a deed (common with property, settlement arrangements, and some finance documents), it’s worth understanding the formalities around Signing A Deed.

This isn’t just technical. If a document is executed incorrectly, you could end up with:

• an agreement that’s unenforceable (which can be disastrous if you’re relying on it); or
• an argument about whether you signed in a personal capacity.

Data And Confidential Information (Yes, It’s A Director Issue Too)

Directors are often ultimately responsible for making sure the company takes compliance seriously, including privacy compliance where you collect personal data from customers, website visitors, or staff.

If you’re collecting personal data online, having a fit-for-purpose Privacy Policy is one practical step in showing the business is treating data law obligations appropriately.

Directors also need to ensure confidentiality is handled properly, especially when employees, contractors, and founders have access to sensitive information like pricing, supplier terms, customer lists, and product roadmaps.

Key Takeaways

• Director fiduciary duties in the UK are largely set out in the Companies Act 2006, and they apply to small businesses just as much as large ones.
• You must act within your powers, promote the company’s success, exercise independent judgment, and use reasonable care, skill, and diligence in decision-making.
• Avoiding conflicts of interest is a core fiduciary obligation - disclose interests early and follow the company’s approval process (especially where multiple shareholders are involved).
• Don’t accept benefits from third parties linked to your role as director, and don’t use company assets or funds for personal purposes without proper structure and records.
• Good governance doesn’t need to be complicated: document key decisions, keep clear records, and make sure your constitution and shareholder arrangements reflect how your business actually runs.
• If the company is in financial trouble, directors may need to give increasing weight to creditors’ interests - get advice early and document decisions.
• Signing documents correctly matters: the way you execute contracts and deeds can affect enforceability and personal liability exposure.

If you’d like help putting the right legal foundations in place for your company directors (or you’re worried about a decision that might create a conflict), you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.