Fiduciary duty

Legal duty to act in the best interests of another party. For directors and managers: duty of care, duty of loyalty, duty of good faith.

Definition

Fiduciary duty is a legal obligation to act in the best interests of another party (the 'beneficiary'). For Delaware corporations and LLCs, fiduciary duties apply to directors, officers, and (in some structures) controlling members. Three core duties: care (informed decision-making), loyalty (no self-dealing or conflicts), and good faith (acting honestly).

Context

Delaware's LLC Act allows broad modification of fiduciary duties via Operating Agreement (6 Del. C. § 18-1101); the implied covenant of good faith and fair dealing cannot be eliminated.

Example

A Delaware C-Corp director who buys company assets at below-market price for personal benefit breaches duty of loyalty. The board can typically pursue the breach.

Common pitfalls

LLC fiduciary modifications must be explicit in the Operating Agreement.
Duty of care can be substantially limited under Delaware Act; courts respect Operating Agreement provisions.

What fiduciary duty means once you strip away the jargon

A fiduciary duty is the obligation one person owes to act in the genuine interest of another instead of their own. The glossary entry frames it through the three Delaware pillars of care, loyalty, and good faith, and that framing is the right place to begin. Care means you gather enough information before deciding. Loyalty means you do not put your own pocket ahead of the entity. Good faith means you act honestly rather than tricking people who depend on your judgment. These ideas predate LLCs by centuries because they grew out of trust law, where a trustee held property for someone else and could not quietly skim from it.

For a Delaware LLC, the people who can carry fiduciary obligations are usually the managers, officers, and in some arrangements the controlling members. The reason the concept feels abstract to many founders is that it describes a relationship rather than a single document or filing. There is no fiduciary form to submit to the state, and no fiduciary fee to pay. The duty arises from the position you hold and the power you have over money or decisions that belong to others.

Understanding this distinction matters because a founder often assumes that signing the Certificate of Formation creates these duties. It does not. The duties attach to roles and to control, and Delaware lets the Operating Agreement reshape much of that landscape. That flexibility is exactly why Delaware is a popular home for entities, and why reading the duty correctly is worth the effort.

Why the duty barely touches a true single-member foreign-owned LLC

The most common structure for a non-resident founder is a single-member LLC where one person owns everything and also runs everything. In that setup the practical force of fiduciary duty is small, because the duty exists to protect other people, and there are no other members to protect. If you own all of the LLC and manage it yourself, you cannot meaningfully breach a duty of loyalty to yourself by paying yourself or by choosing one supplier over another. The beneficiary and the fiduciary are the same person.

This is not the same as saying duties vanish. The LLC is still a separate legal person, and money inside it is not automatically your personal money in the eyes of banks, tax authorities, or future investors. The discipline that fiduciary thinking encourages, such as keeping clean records and separating accounts, still serves you well even when no one can sue you for ignoring it. Treating the entity as distinct supports limited liability and makes later steps like raising capital or adding a partner far smoother.

So a sole owner should read this term less as a list of rules to fear and more as a preview of obligations that activate the moment a second member, an investor, or an outside manager appears. The single-member phase is the quiet window in which you can set up habits that will matter when the structure grows.

The duty of care in everyday operating decisions

The duty of care asks whether a decision-maker was reasonably informed before acting. In Delaware corporate law this idea was sharpened by cases holding directors responsible when they approved major transactions without studying the facts. For an LLC, the duty of care can apply by analogy to managers unless the Operating Agreement softens it. The practical translation is simple. When you make a choice that affects the entity and its owners, you should be able to point to the information you looked at first.

Picture a two-member Delaware LLC formed by founders in different countries. One serves as the managing member and signs a year-long lease for office space without telling the other or comparing alternatives. If that lease turns out to be costly and the other member objects, the question a court would ask is whether the manager acted with the care of an ordinarily prudent person in similar circumstances. Reviewing terms, getting a second quote, and documenting the reasoning are the behaviors that satisfy care.

The reassuring counterweight is the business judgment rule, a related concept that protects informed decisions even when they later go badly. Courts do not punish managers for being wrong. They scrutinize managers for being careless or conflicted. A founder who keeps notes on why a decision was made gives themselves strong protection, because the rule presumes good decisions when the process was sound.

The duty of loyalty and the problem of self-dealing

Loyalty is the duty that draws the most attention because it targets self-interest. It forbids a fiduciary from quietly enriching themselves at the entity's expense, from taking opportunities that belong to the entity, and from competing against it in secret. The classic example is a manager who sells an asset to the company at an inflated price, or buys one from the company too cheaply, capturing the difference personally. That is the breach the glossary entry describes with the director who buys company assets below market value.

In a multi-member foreign-owned LLC, loyalty issues appear in ordinary ways. Suppose one member also owns a separate manufacturing business abroad and routes all of the LLC's purchases through that business at marked-up prices. Even if the goods are fine, the undisclosed markup is a loyalty concern because the member is profiting from a conflict that the other members did not approve. The cure is usually disclosure followed by approval from disinterested members, which is why transparency is the heart of loyalty.

Delaware allows an Operating Agreement to permit certain self-dealing if the right procedures are spelled out in advance. A well drafted agreement might say that a member may transact with the LLC as long as terms are disclosed and approved. This is the practical lever non-resident founders should understand. You can design loyalty rules to fit a venture that naturally involves related parties, but the permissions must be explicit and written before the conflict arises.

Good faith and the covenant that cannot be erased

Good faith is the duty to act honestly rather than to manipulate the gaps in an agreement. Delaware's LLC Act lets owners modify or even eliminate many traditional fiduciary duties through the Operating Agreement, but it draws one firm line. The implied covenant of good faith and fair dealing cannot be removed. This covenant fills in the spirit of a bargain where the written words run out, preventing a party from using a technicality to defeat the obvious purpose of the deal.

For a founder this means there is a floor beneath any contract. Even if your Operating Agreement waives the formal duties of care and loyalty, no member can exploit a drafting gap in a way that nobody would have agreed to if they had thought of it. Imagine an agreement that gives one member sole discretion to set distribution amounts. The covenant stops that member from setting distributions at zero forever purely to starve out a partner, because that result would betray the reasonable expectations behind the discretion.

The covenant is narrow on purpose. It does not rewrite bargains or add terms the parties could have negotiated and chose not to. It only protects the implied expectations that are so basic they went without saying. Knowing that this floor exists lets a founder customize duties confidently, because the law preserves a minimum of honesty no matter how aggressively the agreement is tailored.

How Section 18-1101 lets you reshape these duties

The center of Delaware's appeal for LLCs is the principle that an LLC is a creature of contract. The statute directs courts to give maximum effect to freedom of contract and to the enforceability of operating agreements. Within that philosophy, 6 Del. C. § 18-1101 expressly allows members to expand, restrict, or eliminate fiduciary duties, with the single exception of the implied covenant of good faith and fair dealing. This is a far broader latitude than most corporate regimes offer.

Practically, the Operating Agreement is where this reshaping happens. A founder who wants the entity to run with minimal friction might reduce the duty of care to a gross negligence standard, or carve out specific permitted conflicts so that ordinary related-party dealings are not constant breaches. A founder building toward outside investment might instead preserve full duties to reassure future partners that managers are bound to act in everyone's interest. Both are valid choices under the same statute.

The one rule the entry stresses is that modifications must be explicit. Delaware courts respect clear waivers, but they will not infer that owners meant to surrender protections that ordinary fiduciaries owe. Vague language tends to be read against the party trying to escape a duty. A non-resident founder drafting from abroad should treat the fiduciary provisions as deliberate design decisions and write them plainly, ideally with counsel who knows the Delaware framework.

Worked example: adding a co-founder later

Consider a founder in Lisbon who forms a single-member Delaware LLC, files the Certificate of Formation for the $110 state fee, obtains an EIN through Form SS-4 in roughly 8 to 10 business days, and opens a US-facing account with one of the fintech options such as Mercury, Wise, Relay, Lili, or Payoneer. For the first year there are no fiduciary tensions because there is one owner. The dormant duties become live the day a co-founder in Berlin joins and takes a 40% stake.

From that moment the Lisbon founder, if she manages the company, owes care and loyalty to the new member unless the amended Operating Agreement says otherwise. If she keeps signing big contracts without informing him, or routes company spending through a side business she controls without disclosure, she risks a care or loyalty claim. The same actions that were harmless as a sole owner now have a counterparty who can object.

The clean way to handle this transition is to redraft the Operating Agreement at the moment of admission. The new agreement defines how decisions are made, what conflicts are pre-approved, how distributions work, and which duties apply at what standard. Doing this at the start of the partnership is far easier than untangling a dispute later, and it converts vague fiduciary anxiety into concrete, agreed rules that both members can rely on.

How fiduciary duty connects to formation and the Operating Agreement

Formation and fiduciary duty are linked through one document above all others, the Operating Agreement. The state filing creates the entity with the $110 Certificate of Formation, but the state does not dictate the internal governance. Delaware leaves that to the owners, which is why the Operating Agreement is the instrument that defines, modifies, or waives fiduciary duties. A founder who forms an LLC without a thoughtful Operating Agreement is relying on default expectations rather than chosen rules.

For a single-member LLC, the Operating Agreement may feel like a formality, but it still does useful work. It documents that the entity is separate from the owner, which supports limited liability and reassures banks and payment processors during onboarding. When the company later adds members, the same document becomes the home for the fiduciary terms discussed throughout this entry. Building it early means the governance scaffolding is already in place when it is needed.

It helps to see the sequence as layered. The Certificate of Formation establishes existence with the state. The EIN gives the entity a federal tax identity. The bank account gives it operational capacity. The Operating Agreement gives it internal law, including its fiduciary settings. Each step supports the next, and the fiduciary rules sit inside the final layer where the owners themselves hold the pen.

Fiduciary thinking and the entity's money: banking discipline

Fiduciary duty is fundamentally about respecting money and decisions that are not purely your own, so it pairs naturally with banking discipline. When a Delaware LLC opens an account with a provider like Mercury, Wise, Relay, Lili, or Payoneer, that account belongs to the entity. Treating it as a personal wallet undermines the separateness that limited liability depends on and, in a multi-member entity, can edge into loyalty problems if owner withdrawals are not properly accounted for.

A practical habit is to keep entity funds clearly distinct from personal funds and to record the reason for transfers. If you pay yourself, label it as a draw or a salary depending on your structure. If the company reimburses an expense, keep the receipt. None of this is glamorous, but it is the operational expression of acting in good faith toward the entity, and it produces the paper trail that protects you if anyone later questions a transaction.

For a sole owner this discipline mostly protects limited liability and simplifies tax preparation. For a partnership it does both of those and also defuses fiduciary disputes before they start. When every transfer between an owner and the company is documented and consistent with the Operating Agreement, there is little room for a loyalty argument to gain traction, because the facts speak for themselves.

Where tax filings intersect with fiduciary conduct

Tax obligations are separate from fiduciary duty in legal theory, but they meet in practice through the records a responsible owner keeps. A single-member foreign-owned LLC is treated as a disregarded entity for US federal income tax and must file Form 5472 together with a pro forma 1120 to report transactions between the LLC and its foreign owner. Missing that filing carries a penalty of $25,000, so the related-party transactions that fiduciary duty cares about are also the ones the IRS wants disclosed.

This overlap is useful to notice. The same reportable transactions, such as money the owner contributes to or takes from the LLC, are the transactions that loyalty analysis examines in a multi-member setting. A founder who tracks these carefully for Form 5472 purposes is already building the documentation that good faith and loyalty would expect. The tax compliance habit reinforces the governance habit rather than competing with it.

Founders should also remember the recurring Delaware franchise tax, a flat $300 due each June 1, which is an entity obligation rather than a personal one. Paying entity-level costs from entity funds and personal costs from personal funds is a small example of keeping roles straight. This is general information rather than tax advice, and a non-resident owner with a more complex structure benefits from a tax professional who can map duties and filings together.

BOI reporting context and why it is no longer a worry here

Beneficial ownership information reporting under the Corporate Transparency Act once loomed large for new LLC owners, and it is worth situating against fiduciary duty because both deal with transparency, just to different audiences. Fiduciary duty concerns honesty toward co-owners and the entity. BOI reporting concerned disclosure to the federal government about who ultimately owns or controls a company.

Under the FinCEN Interim Final Rule of March 26 2025, US-formed entities, including domestic Delaware LLCs, are exempt from the BOI reporting requirement. For a non-resident founder forming a Delaware LLC, this removes a compliance step that earlier guidance had treated as mandatory. It is a meaningful simplification, although founders should still verify current requirements when they form, because rules in this area have shifted more than once.

The takeaway for this entry is that external transparency obligations and internal fiduciary obligations are different things. The BOI exemption does not change anything about the duties owed among members or by managers. A founder who relaxes governance because one federal filing went away would be misreading the situation. Fiduciary duty lives inside the entity's relationships and persists regardless of what the federal disclosure regime requires.

Related terms that complete the picture

Fiduciary duty sits at the center of a small family of concepts a founder will meet repeatedly. The duty of care and the duty of loyalty are its two operational branches, and reading their dedicated entries adds depth to the care and loyalty discussions here. The business judgment rule is the protective doctrine that shields informed, disinterested decisions from second-guessing, and it is the reason careful managers can act boldly without fear of liability for honest mistakes.

The Delaware LLC Act, and § 18-1101 in particular, is the statutory engine that makes all of this customizable. Anyone planning to modify duties should understand that the Act is intentionally permissive and built around freedom of contract. The implied covenant of good faith and fair dealing is the non-waivable floor that survives any modification. Together these terms form a coherent system where owners design most of the rules but cannot design away basic honesty.

For non-resident founders, two more practical neighbors are the Operating Agreement and the Court of Chancery. The Operating Agreement is where fiduciary settings are written. The Court of Chancery is the Delaware business court whose judges interpret those agreements and resolve fiduciary disputes, and its deep body of decisions is a large part of why founders choose Delaware in the first place.

Edge cases that surprise founders

Several edge cases catch founders off guard. The first is the manager-managed versus member-managed distinction. In a member-managed LLC, members who run the company can carry manager-style duties, while in a manager-managed LLC, passive members generally owe fewer duties because they do not control operations. How you label the structure in the Operating Agreement therefore shapes who owes what, which is why the labeling deserves real thought rather than a default checkbox.

A second edge case is the controlling member. Even where most members owe limited duties, a member who holds effective control over the entity can attract heightened scrutiny, because control creates the power to harm others. A non-resident founder who keeps majority control after taking on partners should expect that control to come with corresponding responsibility unless the Operating Agreement clearly reallocates it. Power and duty tend to travel together in Delaware analysis.

A third edge case involves waivers that go too far in practice. While the Act allows broad elimination of duties, an agreement that tries to license dishonesty runs into the good faith covenant that cannot be waived. Drafters sometimes write sweeping exculpation language and assume it covers everything, only to find that the covenant still constrains the most egregious conduct. The lesson is that elimination of duties is powerful but not absolute, and good drafting respects that boundary.

Common misunderstandings to clear up

The first misunderstanding is that forming an LLC automatically loads the owner with onerous fiduciary obligations. For a true single-member LLC there is essentially no one to owe duties to, so the burden is light until other owners or outside managers appear. Founders sometimes delay forming because they fear this weight, when the weight simply is not there yet at the sole-owner stage.

The second misunderstanding is the reverse, an assumption that because Delaware allows duties to be modified, they can be ignored entirely without writing anything down. The Act rewards explicit drafting, not silence. If you want reduced or customized duties, the Operating Agreement has to say so clearly. Leaving the document vague tends to default toward the protective duties that Delaware applies by analogy, which is the opposite of what a founder seeking flexibility usually wants.

The third misunderstanding is treating fiduciary duty as the same thing as limited liability or as a tax matter. They are separate. Limited liability protects owners from the entity's debts. Tax rules govern filings like Form 5472 and the franchise tax. Fiduciary duty governs how decision-makers treat the entity and its co-owners. A founder who keeps these three lanes distinct will reason far more clearly about each, and will avoid the trap of solving one problem with a tool meant for another. This entry is general information and not legal or tax advice for any specific situation.

Related terms

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