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Fiduciary Duty Explained for Swiss Businesses in 2026

Discover a clear and practical guide to fiduciary duty: definition, types, Swiss legal context, and what it means for your business in 2026.

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Finance d'entreprise

Table of contents

Introduction
What Is Fiduciary Duty? The Core Definition
What Are the 5 Core Fiduciary Duties You Should Know?
Who Has a Fiduciary Duty in Switzerland?
How Does Swiss Law Define Fiduciary Responsibility?
What Do Fiduciary Duties Look Like in Practice?
What Happens When Fiduciary Duty Is Breached in Switzerland?
How to Choose a Fiduciary You Can Trust in Switzerland
Conclusion

Introduction

Imagine hiring a financial advisor to manage your company's pension contributions — and discovering months later that they had been placing funds into products that earned them a commission, not the best returns for your team. That situation is not just bad practice. It is a violation of fiduciary duty.

The term comes up in boardrooms, law offices, fiduciary firms, and estate planning meetings across Switzerland every day. But most business owners, shareholders, and even some professionals could not define it precisely. That is a real problem — because when you understand what fiduciary duty means, you know exactly what you are owed from the people you trust, and exactly what you owe to those who rely on you.

This guide covers the full picture: the definition, the five core duties, who holds them under Swiss law, and what happens when they are broken.

What Is Fiduciary Duty? The Core Definition

A fiduciary duty is a legal obligation to act in the best interest of another person or party — placing their interests above your own. The person who holds this obligation is called a fiduciary. The person they serve is called the beneficiary (or principal, depending on the legal framework).

The word comes from the Latin fiducia, meaning trust. That origin is not just etymology — it defines the entire relationship. A fiduciary is someone you trust to act on your behalf, often in situations where you cannot easily monitor or evaluate every decision they make.

This is what makes the fiduciary standard different from ordinary business relationships. In a standard commercial contract, both parties are allowed to pursue their own interests. In a fiduciary relationship, one party has accepted a binding legal commitment to prioritise the other's interests over their own.

Fiduciary duty’s meaning, in plain terms: when you are a fiduciary, what is good for you personally must not drive your decisions. What is good for the person you serve must.

What Are the 5 Core Fiduciary Duties You Should Know?

Fiduciary responsibilities are not one single rule. They are a cluster of obligations that work together. Understanding them individually makes it easier to spot when one is being met — and when it is not.

1. Duty of Care

The fiduciary must act with the level of skill, diligence, and care that a reasonably competent professional in the same role would apply. This is not a requirement for perfection. It is a requirement for genuine effort, proper research, and sound judgment. Under Swiss corporate law, this means directors must be informed when they vote — not passive, not negligent.

2. Duty of Loyalty

This is the core of the fiduciary obligation. The fiduciary must not let personal interests, third-party relationships, or financial incentives influence decisions that affect the beneficiary. Conflicts of interest must be disclosed. Side arrangements that benefit the fiduciary at the beneficiary's expense are prohibited.

3. Duty of Good Faith

The fiduciary must act honestly and transparently. Good faith means that decisions are made for legitimate reasons — not to advantage the fiduciary or harm the beneficiary. It applies to how information is shared, how advice is framed, and how the relationship is managed day to day.

4. Duty of Confidentiality

Information shared within a fiduciary relationship is protected. A wealth manager cannot share a client's financial profile. A lawyer cannot discuss a client's strategy. An accountant cannot disclose a company's internal figures. The duty of confidentiality creates the protected space that makes the fiduciary relationship possible.

5. Duty of Disclosure

The fiduciary must proactively share all information that is material to the beneficiary's interests — including conflicts, risks, fees, and relevant changes in circumstances. In Switzerland, this duty has been significantly formalised by the Financial Services Act (FinSA), which requires written documentation of all disclosures for regulated professionals.

Note

All five duties apply simultaneously. Fulfilling four and failing on one is still a breach.

Who Has a Fiduciary Duty in Switzerland?

Fiduciary obligations apply across a wide range of professional relationships. Here are the main categories under Swiss law.

1. Corporate Directors and Officers

Board members and senior executives of Swiss companies owe fiduciary duties to the company and its shareholders. They must act in the long-term interest of the business, avoid conflicts of interest, and exercise their judgment carefully. These obligations flow from Article 717 of the Swiss Code of Obligations.

2. Wealth Managers and Asset Managers

Anyone managing third-party assets professionally in Switzerland is a fiduciary. Under FinIA (Financial Institutions Act), they must hold a licence and comply with formally documented fiduciary obligations. Their duty runs directly to the client — product selection, fee disclosure, and investment rationale all fall within the scope of what a fiduciary in Switzerland actually does. For a deeper look at these responsibilities, see our guide on what a fiduciary in Switzerland actually does.

3. Trustees

Switzerland does not have a domestic trust law, but it ratified the Hague Convention on the Law Applicable to Trusts. This means Swiss-based trustees of foreign-law trusts operate under recognised fiduciary obligations. The fiduciary trustee relationship — where assets are held on behalf of beneficiaries — is fully enforceable under Swiss law through this framework.

4. Accountants and Auditors

Fiduciary firms and licensed accountants owe duties of care, confidentiality, and accuracy to their clients. Statutory auditors carry additional obligations toward the company's shareholders and regulators. Understanding fiduciary costs in Switzerland helps clients set realistic expectations about the scope of these professional services.

5. Legal Representatives and Attorneys

Attorneys owe the highest duty of loyalty and confidentiality to their clients — including a strict prohibition on representing opposing interests without full disclosure and explicit consent.

6. Pension Fund Managers (Pillar 2 / BVG)

Managers of occupational pension funds handle retirement assets for thousands of employees. They operate under strict fiduciary obligations defined by the Federal Act on Occupational Retirement, Survivors' and Disability Pension Plans (BVG/LPP), with oversight from independent supervisory commissions in each canton.

For deeper insights, explore the pension system in Switzerland via our guide.

Do Shareholders Have a Fiduciary Duty in Switzerland?

Generally, no. Under Swiss corporate law, shareholders do not owe fiduciary duties to each other or to the company simply by virtue of holding shares. However, if a major shareholder actively participates in management, exercises significant control over board decisions, or is formally appointed as a director, fiduciary obligations can arise from that role. Owning shares and owing fiduciary duties are not the same thing — a distinction that matters in shareholder disputes and corporate governance reviews.

How Does Swiss Law Define Fiduciary Responsibility?

Switzerland does not have a single statute called the Fiduciary Act. Instead, fiduciary responsibilities are embedded across several important pieces of legislation — creating a layered, coherent legal framework.

1. Swiss Code of Obligations — Articles 394-406 (Mandate Law)

The Swiss Code of Obligations is the foundational legal basis for most fiduciary relationships in Switzerland. Articles 394 to 406 govern the mandate contract — the legal structure behind virtually every fiduciary engagement. Under this framework, the fiduciary must follow the client's instructions, act in good faith, avoid conflicts of interest, and render a full account of their activities on request.

2. Swiss Code of Obligations — Article 717 (Corporate Governance)

For directors and officers, Article 717 is the key provision. Board members must act with care and loyalty in the interests of the company. Swiss courts apply the business judgment rule — protecting directors who make decisions in good faith, with proper information, and without personal conflict — but there is no protection for decisions made carelessly or with a hidden agenda.

3. Financial Services Act (FinSA) — In Force Since January 2020

FinSA was a landmark reform for Swiss financial regulation. It requires all financial service providers to act in the best interest of clients, disclose all fees and conflicts, document their advice, and categorise clients by financial knowledge and experience. The law brought Swiss standards meaningfully closer to the EU's MiFID II framework and created a new level of accountability for wealth managers and advisors across the country.

4. Financial Institutions Act (FinIA)

FinIA governs the licensing and ongoing conduct requirements for professional asset managers and trustees. Since 2020, any firm or individual managing third-party assets professionally must hold a licence and be supervised — either by FINMA directly or by a recognised supervisory organisation (SO) that conducts regular audits.

5. The Hague Trust Convention (Ratified by Switzerland in 2007)

Switzerland does not have a domestic trust law. However, it ratified the Hague Convention on the Law Applicable to Trusts, which means Swiss courts recognise foreign-law trusts and the fiduciary obligations of trustees based in Switzerland. For clients with international asset structures or cross-border estate planning, this provides important legal certainty.

What Changed for Swiss Fiduciaries After 2020?

The FinSA and FinIA reforms were the most significant overhaul of Swiss fiduciary regulation in a generation. Before 2020, many independent asset managers operated with minimal formal supervision. After 2020, the rules shifted fundamentally:

All managers of third-party assets must hold a valid licence.
Fiduciary obligations must be documented, auditable, and reviewed annually.
Written client agreements are mandatory — defining scope, fees, conflicts of interest, and reporting obligations.
Supervisory organisations conduct regular compliance reviews of every licensed firm.

For anyone engaging a fiduciary in Switzerland today, this matters. The standards your adviser is legally required to meet are meaningfully higher than they were five years ago.

What Do Fiduciary Duties Look Like in Practice?

Fiduciary duty sounds abstract until you see it in action. These five scenarios show what upholding — and breaking — a fiduciary obligation actually looks like day to day.

1. Financial Advisor

Upheld: Recommends a lower-cost fund with better historical performance, even though a higher-fee product would earn a larger commission.
Breached: Suggests the high-fee product without disclosing the commission — a direct violation of the duty of loyalty and disclosure.

2. Board Director

Upheld: Reviews the full acquisition file, commissions an independent risk analysis, and votes based on long-term shareholder value.
Breached: Approves the deal without reading the terms because the acquiring firm is run by a personal contact.

3. Accountant or Fiduciary Firm

Upheld: Flags a tax filing error immediately, notifies the client, and corrects the submission — even though it means additional billable work.
Breached: Overlooks the error to avoid a difficult conversation, resulting in penalties that fall on the client.

4. Trustee

Upheld: Distributes trust assets strictly according to the trust deed and beneficiary entitlements, documenting every decision.
Breached: Uses trust assets for a personal investment opportunity, even temporarily, without disclosure or authorisation.

5. Pension Fund Manager

Upheld: Selects investment managers through a competitive, documented process focused on risk-adjusted returns for plan members.
Breached: Directs fund assets to an investment platform with which the manager has an undisclosed business relationship.

What links all five breaches is the same structural failure: the fiduciary placed their own interest — financial, relational, or reputational — above their obligation to the person or entity they were trusted to serve.

What Happens When Fiduciary Duty Is Breached in Switzerland?

A breach of fiduciary duty in Switzerland is not just an ethical failure — it has concrete legal consequences. The severity depends on the nature of the relationship, the harm caused, and which legal framework governs the situation.

Civil Liability

The most common consequence is civil liability under the Swiss Code of Obligations. The fiduciary can be held responsible for financial losses caused by the breach. The beneficiary must demonstrate that the duty existed, the duty was breached, and the breach directly caused measurable harm.

FINMA Sanctions

For regulated professionals — wealth managers, asset managers, trustees licensed under FinIA — a breach can trigger regulatory action by FINMA (Swiss Financial Market Supervisory Authority). Sanctions include formal warnings, activity restrictions, licence revocation, and publication of enforcement decisions. FINMA-published decisions are public and permanent.

Criminal Prosecution

In serious cases — fraud, embezzlement, misappropriation of client assets — breach of fiduciary duty can become a criminal matter under the Swiss Penal Code. This is particularly relevant in corporate governance contexts where a director has intentionally acted against the company's interests for personal gain.

Reputational Consequences

Beyond formal sanctions, the reputational damage from a publicly documented breach is often the most lasting consequence. For individual professionals and fiduciary firms, this can mean the end of client relationships built over decades.

The practical lesson for anyone working with a fiduciary: request a written mandate at the outset. A formal, documented engagement defines the scope of the relationship, the obligations of both parties, and the mechanism for resolving disputes if something goes wrong.

How to Choose a Fiduciary You Can Trust in Switzerland

Understanding the legal framework is useful. Applying it when selecting a professional is where it actually protects you.

Here are the questions that matter most before engaging a fiduciary in Switzerland.

Are they licensed and supervised?

Since 2020, professional asset managers and trustees must hold a licence under FinIA. Ask which supervisory organisation they are registered with and verify it. Unregulated providers offering fiduciary services are a red flag, not a bargain.

Do they provide a written mandate?

A written client agreement is legally required for regulated financial professionals under FinSA. For any fiduciary engagement — not just financial — a written mandate protects both parties. If a fiduciary resists putting the terms in writing, that is the answer to your question.

How do they handle conflicts of interest?

Ask directly. A well-managed fiduciary firm has a documented conflict-of-interest policy, discloses all fees and referral arrangements, and flags potential conflicts in writing before acting. Vague answers or deflection are warning signs.

What is their track record?

Look for verifiable professional credentials — membership in Swiss professional associations, audited track record, and client references. For corporate fiduciary services, published FINMA registration is publicly searchable.

Do they explain their fees clearly?

Undisclosed or opaque fee structures are among the most common triggers for breach of the fiduciary standard in Switzerland. A trustworthy fiduciary will give you a clear, written fee schedule — including any third-party arrangements — before the engagement begins.

Understanding what to expect from a fiduciary account and the associated obligations can also help you ask better questions before committing to an engagement.

Fiduciaire Vaudoise - Your Trusted Fiduciary in Vaud

Fiduciaire Vaudoise works with business owners, directors, and international clients across Switzerland. If you are setting up a company or need fiduciary support with full transparency, our team is ready.

Conclusion

Fiduciary duty is not a technicality reserved for lawyers and compliance officers. It is the legal and ethical backbone of every trusted professional relationship in Switzerland — from the board director signing off on an acquisition to the wealth manager choosing where your retirement assets go.

Switzerland has a strong, multi-layered framework that protects beneficiaries. But knowing the framework is the first step. Applying it — by asking the right questions, requesting written mandates, and choosing professionals who meet the formal fiduciary standard — is what actually protects you.

If you are looking for a fiduciary firm in Switzerland that takes its obligations seriously, Fiduciaire Vaudoise is here to help. Based in Lausanne, we combine technical expertise with the transparency and loyalty our clients deserve.