A fiduciary in a will is the person or institution the testator chooses to manage the estate’s property and financial affairs for the benefit of the beneficiaries. The role carries real legal weight: a fiduciary who mismanages assets, favors one beneficiary over another, or treats estate money as their own can be removed by the court, ordered to repay losses out of their own pocket, and in serious cases prosecuted criminally.
The word “fiduciary” is an umbrella. Depending on how the will is written, it can refer to the executor who shepherds the estate through probate, the trustee who manages a trust created by the will, or two or more people serving together as co-fiduciaries. All of them answer to the same core legal standard.
The Two Duties That Define the Role
Every fiduciary under a will owes two enforceable duties: loyalty and prudence. These are not aspirational. Courts treat them as legal obligations, and violating either one exposes the fiduciary to personal liability.
Loyalty means putting the beneficiaries’ interests ahead of your own in every decision. A fiduciary cannot buy estate property for themselves, steer investments toward their own business, or sit on both sides of a transaction involving the estate. Even deals that look fair on paper can be challenged if the fiduciary stood on both sides. Most breach-of-duty claims trace back to this duty, and courts scrutinize self-dealing aggressively.
Prudence means managing the estate’s assets with the skill and caution a reasonable person would use when handling someone else’s property. For an executor working on a shorter timeline, that looks like keeping insurance current, depositing cash in interest-bearing accounts, and not letting real estate deteriorate between death and distribution. For a trustee managing assets over years, it usually means diversifying investments rather than concentrating everything in a single stock or asset class.
Beyond loyalty and prudence, a fiduciary must act in good faith, keep estate information confidential, and give beneficiaries honest answers when they ask about the administration.
The Fiduciary Roles a Will Can Create
Which hat the fiduciary is wearing matters, because the scope of each job is different.
Executor
The executor, sometimes called the personal representative, is responsible for taking the entire estate through probate. That means gathering assets, paying debts and taxes, and distributing what’s left to the beneficiaries according to the will. The role has a defined endpoint. Once the estate is fully administered and the court approves a final accounting, the executor is done.
Trustee of a Testamentary Trust
Some wills direct the executor to create a trust after death, called a testamentary trust. A trustee then manages the assets inside that trust according to its terms. A trustee’s job can stretch for years or decades, for example when a trust holds funds for a minor child until they reach a specified age. The trustee’s authority is limited to the trust assets, not the broader estate.
Co-Fiduciaries
A testator can name two or more people to serve together as co-executors or co-trustees. The arrangement adds oversight but also adds complexity. Co-fiduciaries generally must agree on major decisions, and each one is responsible for watching what the other does. Ignoring a co-fiduciary’s questionable decisions is not a defense. If a beneficiary suffers a loss, courts can hold any co-fiduciary liable who failed to pay attention or raise objections. Serving alongside someone else is not a passive role.
How a Person Named in a Will Actually Becomes a Fiduciary
Being named in a will is a nomination, not an automatic appointment. The probate court makes it official.
When someone dies with a will, the nominated executor files a petition with the probate court. If the court accepts the will as valid and finds the nominee qualified, it issues a document called Letters Testamentary. That document is what gives the executor legal authority to act. Banks, title companies, and government agencies all require it before they will cooperate. If the named executor cannot serve, or if the person died without a will, the court issues Letters of Administration instead, appointing an administrator who holds similar powers but typically needs court approval for more decisions.
The court may also require the fiduciary to post a bond, which functions as an insurance policy that protects the estate against mismanagement. Bond premiums come out of estate funds and typically run between 0.5% and 5% of the estate’s value annually, depending on the fiduciary’s credit and the estate’s size. Many wills waive the bond requirement, and courts usually honor that waiver when all beneficiaries consent.
Not every nominee qualifies. Common disqualifying factors include felony convictions in many states and, in some jurisdictions, being a minor. Residency rules vary, and some states place restrictions or added conditions on out-of-state executors.
What the Job Actually Involves
The executor’s to-do list is long, and the stakes for getting it wrong are personal. The core responsibilities include:
- Locating and cataloging every asset the deceased owned, including real estate, bank and investment accounts, retirement funds, vehicles, valuable personal property, and digital assets. In most states this inventory becomes a formal court document.
- Securing and preserving those assets by maintaining insurance, keeping cash in interest-bearing accounts, and safeguarding valuables until distribution.
- Notifying the Social Security Administration, banks, credit card companies, credit bureaus, and other institutions where the deceased held accounts. The funeral home usually handles the SSA notification, but if it doesn’t, the executor must.1USAGov. Agencies to Notify When Someone Dies2Social Security Administration. What to Do When Someone Dies
- Paying the deceased’s outstanding bills, final medical costs, and taxes. Funeral and burial expenses generally take first priority among creditors.
- Filing tax returns for the estate. This includes notifying the IRS of the fiduciary relationship, obtaining an EIN for the estate, filing a final personal income tax return for the deceased, filing an estate income tax return if the estate generates $600 or more in gross income during a tax year, and, for very large estates, a federal estate tax return.3Internal Revenue Service. Responsibilities of an Estate Administrator
- Providing a formal accounting to the court, the beneficiaries, or both, showing every asset, every expense paid, and every distribution made.
- Distributing what remains to the beneficiaries exactly as the will directs.
A fiduciary doesn’t have to handle everything alone. Estate funds can pay for attorneys, accountants, appraisers, and other professionals whose work benefits the estate. Hiring help on complicated tax or legal questions is often the prudent choice. Trying to save the estate money by winging a complex tax return is exactly the kind of decision that leads to personal liability later.
Compensation
Serving as a fiduciary is real work, and the law recognizes that you’re entitled to be paid for it. If the will specifies a fee, whether a flat amount, an hourly rate, or a percentage of the estate, that controls. When the will is silent, state law fills the gap. Some states set compensation by statute using a graduated percentage of the estate’s value, typically between about 1% and 5% depending on size. Other states allow “reasonable compensation,” which courts determine by looking at the estate’s complexity, the time spent, and the fiduciary’s skill level. Trustee compensation follows similar principles, though ongoing trust administration usually justifies annual fees rather than a one-time payment.
Compensation is separate from expense reimbursement. Court filing fees, postage, travel to manage distant property, and similar costs paid out of pocket are owed back by the estate. One caution: if the estate might not have enough assets to cover all its debts, talk to a probate attorney before advancing your own money. In an insolvent estate, the court prioritizes which creditors get paid first, and out-of-pocket expenses can end up at the back of the line.
What Happens When a Fiduciary Breaches Their Duty
When a fiduciary violates their obligations, beneficiaries aren’t powerless. They can petition the probate court to intervene, and courts take these complaints seriously.
A breach can be straightforward negligence, like missing a tax deadline, letting insurance lapse on estate property, or failing to invest idle cash. It can also be deliberate, like using estate funds for personal expenses or diverting assets to favored beneficiaries outside the will’s instructions. The consequences scale with the severity:
- Removal. The court can strip the fiduciary of their role and appoint a replacement, who may then pursue claims against the removed fiduciary.
- Surcharge. A fiduciary who causes financial losses to the estate can be ordered to repay those losses personally. Courts have applied surcharge liability for failures as specific as not diversifying investments promptly after appointment.
- Criminal prosecution. When the breach involves theft, embezzlement, or fraud, the fiduciary can face criminal charges carrying fines and imprisonment.
Beneficiaries don’t need to wait until the estate is fully administered to raise a concern. If active mismanagement is suspected, filing a petition sooner preserves more of the estate’s value. Courts can freeze assets, require additional bond, or impose supervised administration while the dispute is resolved.