Article Summary
An executor administers your probate estate — the assets in your name alone, distributed through the Circuit Court. A trustee manages trust assets — privately, without court involvement, and potentially for years or decades after your death.
Illinois residents who have both a will and a revocable living trust need both roles filled. Those with a will only need an executor. Those whose entire estate is held in trust and beneficiary-designated accounts may need little more than a successor trustee.
This guide explains what each role involves under Illinois law, compares them side by side, and walks through how to choose the right person — or people — for each job.
At a Glance: Executor vs. Trustee
Executor
Court-supervised, temporary, handles probate assets
Trustee
Private, ongoing, manages trust assets
Key Takeaway
Many estates need both — the same person can fill both roles
What Is an Executor in Illinois?
An executor — sometimes called a personal representative — is the person responsible for administering your estate through the Illinois probate court after you die. You name your executor in your will. If you die without a will, the Circuit Court appoints an administrator to fill the same function.
The executor's authority extends only to probate assets: property held in your name alone, without a beneficiary designation or automatic transfer mechanism. Assets held in joint tenancy, payable-on-death accounts, retirement accounts with named beneficiaries, life insurance proceeds, and assets held in a living trust all pass outside of probate — and completely outside the executor's reach.
Core Executor Duties Under Illinois Law
Illinois executor duties are governed by the Probate Act of 1975, 755 ILCS 5. In a typical estate, the executor must:
File the probate petition and admit the will
The executor petitions the Circuit Court in the county where the decedent lived to open the estate and admit the will to probate. For most Chicago-area estates, that is the Circuit Court of Cook County, Probate Division. The court issues Letters of Office — the legal credential the executor needs to act on behalf of the estate.
Notify creditors and beneficiaries
The executor must publish a Notice to Creditors in a local newspaper for three consecutive weeks and send formal notice to all beneficiaries and heirs. Under 755 ILCS 5/18-3, creditors then have six months from the first publication to file claims.
Inventory and value all probate assets
Within 60 days of receiving Letters of Office, the executor must file a verified inventory of all probate assets with the court, including fair market values as of the date of death. Real estate, business interests, and unusual assets typically require independent appraisals.
Pay valid debts, expenses, and taxes
After the creditor notice period closes, the executor pays valid claims in the statutory priority order set by Illinois law. The executor also files the decedent's final income tax return and, if applicable, an Illinois estate tax return (required for estates over $4 million as of 2026).
Distribute remaining assets and close the estate
Once all debts and taxes are paid, the executor prepares a final accounting and distributes the remaining estate to beneficiaries as directed by the will. The executor then files a Proof of Closing with the court, formally ending the probate case.
Where an Executor Gets Authority
An executor derives authority from two sources: the will itself and the court's issuance of Letters of Office. Until the Circuit Court issues Letters of Office, the executor has no legal power to act. Banks, title companies, and financial institutions require Letters of Office before they will cooperate with an executor.
The executor role is inherently temporary. Once the estate is fully administered — all debts paid, taxes filed, and assets distributed — the executor's authority terminates. A typical Illinois probate lasts 9–18 months for a straightforward estate.
The executor has no authority over trust assets
A common misconception: people assume the executor controls everything in the estate. In reality, an executor only controls assets that pass through probate. Assets in a properly funded revocable living trust are managed exclusively by the trustee — the executor cannot touch them, sell them, or distribute them. This is by design, and one of the core reasons a trust is a powerful estate planning tool.
What Is a Trustee in Illinois?
A trustee is the person or institution responsible for managing assets held in a trust — following the trust's terms, investing prudently, and distributing assets to beneficiaries as directed. Unlike an executor, a trustee is appointed by the trust document itself, not by a court. There is no probate filing, no Letters of Office, and no court oversight (absent misconduct or a dispute).
In a revocable living trust — the most common trust used in Illinois estate planning — the trust creator (the grantor) typically serves as their own trustee during their lifetime. When the grantor dies or becomes incapacitated, the successor trustee named in the trust document steps in automatically. No court order is required. The successor trustee simply presents the trust document to financial institutions and takes over.
Core Trustee Duties Under Illinois Law
Trustee duties in Illinois are governed by the Illinois Trust Code, 760 ILCS 3, which took effect in 2020. The Trust Code codifies fiduciary duties that trustees have long been held to — but now with greater specificity and enforceability. Core duties include:
Where a Trustee Gets Authority
A trustee's authority comes entirely from the trust document. The trust spells out what assets are held, who the beneficiaries are, when and how distributions are made, what powers the trustee has (to sell, invest, borrow, etc.), and who succeeds the trustee if they cannot serve.
Unlike an executor's role, a trustee's role can be long-term. A successor trustee for a revocable living trust may manage assets and make distributions for years. A trustee of a discretionary trust for a minor beneficiary may serve for decades — until the beneficiary reaches the age specified in the trust for final distribution.
The Illinois Trust Code and the Prudent Investor Standard
Illinois trustees are held to a prudent investor standard under 760 ILCS 5/5. This means a trustee must invest and manage trust assets as a prudent investor would — considering risk, return, diversification, and the specific needs of the trust's beneficiaries. A trustee who concentrates all trust assets in a single stock, or who lets cash sit idle for years without reason, may face personal liability to the beneficiaries for investment losses.
Trustee vs. Executor: Side-by-Side Comparison
The differences between these two roles are fundamental — from how they get authority to how long they serve and how much court oversight applies.
Executor vs. Trustee: Key Differences
| Factor | Executor | Trustee |
|---|---|---|
| Source of appointment | Named in the will; confirmed by Circuit Court | Named in the trust document; no court required |
| Source of authority | Letters of Office issued by the court | The trust document itself |
| Assets controlled | Probate assets only (held in decedent's name alone) | Trust assets only |
| Court oversight | Yes — ongoing during probate administration | None, absent dispute or misconduct |
| Privacy | Public court record | Private — trust is not filed with any court |
| Duration of role | Temporary — ends when probate closes (9–18 months typical) | Can be long-term — years or decades |
| Governing law | 755 ILCS 5 (Probate Act) | 760 ILCS 3 (Illinois Trust Code) |
| Compensation | Reasonable fee from estate assets; approved by court | Reasonable fee from trust assets; set by trust terms |
| Successor named by | Will (or court appoints if will is silent) | Trust document |
| Key goal | Wind down the estate and distribute assets | Manage and protect assets for beneficiaries |
Do You Need Both a Trustee and an Executor?
The answer depends on how your estate plan is structured. Here are the three most common scenarios:
Will only — executor needed, no trustee
If your estate plan consists of a will and beneficiary designations, you only need an executor. Your executor handles the probate estate — everything in your name alone — while beneficiary-designated accounts (retirement accounts, life insurance, payable-on-death accounts) pass directly to the named beneficiaries without going through the executor at all.
Will + revocable living trust — you likely need both
The most common Illinois estate plan for families with significant assets includes both a revocable living trust and a "pour-over will." The trust holds most assets and is managed by the successor trustee. The pour-over will captures any assets left outside the trust at death and "pours" them into it — passing through probate first. This means an executor is needed to handle the pour-over, and a trustee manages the trust assets. In a well-funded trust plan, the probate estate subject to the executor's authority should be minimal.
Learn about our revocable trust servicesFully funded trust — trustee does most of the work
If your revocable living trust is fully funded — meaning all significant assets have been transferred into the trust or carry beneficiary designations — the probate estate may be very small or nonexistent. The successor trustee handles virtually everything. The executor may still be needed for incidental assets that never made it into the trust, but their role is minimal. This is the ideal outcome of careful trust funding.
How to fund a revocable living trust in IllinoisHow to Choose the Right Person for Each Role
The qualities that make someone a good executor are not identical to the qualities that make someone a good trustee. Here is what to look for in each role — and where the considerations diverge.
Qualities of a Good Executor
- Organized and detail-oriented — probate involves paperwork
- Honest and fair-minded toward all beneficiaries
- Willing and able to dedicate time over 12–18 months
- Comfortable dealing with courts, banks, and attorneys
- Ideally located in or near Illinois for practical access
- Younger than you (or a professional if no one fits)
Qualities of a Good Trustee
- Financially savvy — must invest prudently over the long term
- Trustworthy and free from conflicts of interest
- Available for the full duration of the trust (potentially decades)
- Understands and respects the needs of all beneficiaries
- Willing to communicate regularly with beneficiaries
- For larger trusts, consider a professional or corporate trustee
One practical consideration for the trustee role that does not apply equally to executors: longevity. An executor finishes the job in a year or two. A trustee of a trust for minor children may serve for 20 or 30 years. Naming a 75-year-old sibling as successor trustee of a trust intended to benefit your 5-year-old child is a planning mistake — they may not be available or capable when you need them most.
For trusts with significant assets or complex distribution terms, a corporate or professional trustee — such as a bank trust department — is worth considering. Professional trustees bring investment expertise, administrative infrastructure, and institutional continuity that individual family members cannot match. They also eliminate the risk of a family member playing favorites among beneficiaries or co-mingling trust assets with personal funds.
Not Sure Who to Name as Executor or Trustee?
Illinois Estate Law helps Chicago-area families build complete, carefully considered estate plans — including guidance on who to name in each role and why. Flat-fee pricing so you always know what you'll pay.
When the Same Person Can Serve Both Roles
There is nothing in Illinois law that prohibits the same individual from serving as both executor of the will and successor trustee of the revocable living trust. For most families with straightforward estate plans, naming the same trusted person for both roles is entirely appropriate and simplifies estate administration.
Consider naming different people in these situations:
The trust is intended to last for many years
If the trust will continue for 10, 20, or 30 years — for example, a trust that holds assets for minor children until they reach age 30 — you may want a younger or more financially experienced trustee, while the executor can be a peer your own age.
There are potential conflicts among beneficiaries
If the will and trust benefit different people — for example, children from different relationships — having separate executors and trustees with distinct loyalties can reduce the risk of conflict and the appearance of favoritism.
The trust holds significant or complex assets
Investment portfolios, real estate holdings, business interests, or other complex assets benefit from a trustee with relevant financial or business expertise. A family member who is well-suited to handle probate paperwork may not be the best long-term investment manager.
The named person lives out of state
An executor working through Cook County Probate Court benefits from being geographically accessible — attending hearings, coordinating with local attorneys, and managing Illinois property. A trustee, whose role is often more financial than administrative, can more easily serve from another state.
Whatever you decide, always name at least one successor for each role. The person you choose may predecease you, become incapacitated, or decline to serve. A well-drafted Illinois will and trust plan should name a primary and at least one backup for every fiduciary position — executor, successor executor, trustee, and successor trustee.
Frequently Asked Questions
Next Steps
Understanding the distinction between a trustee and an executor is one of the first steps toward a coherent estate plan. The next step is deciding which structure — will only, will plus trust, or trust-centered — best fits your family, and then choosing the right people to fill each role.
If you already have a revocable living trust and want to make sure it is properly funded so that the trustee can actually step in without probate involvement, see our guide on Illinois revocable living trusts. If you need a will or want to understand how a pour-over will works with a trust, our wills page has you covered. And if you are currently serving as executor of an Illinois estate, our guide on executor responsibilities walks through every step of the Cook County probate process.
Speak With an Illinois Estate Planning Attorney
Illinois Estate Law helps Chicago-area individuals and families create clear, complete estate plans — naming the right executor, the right trustee, and putting the right documents in place to protect every asset. Transparent flat-fee pricing with a free initial consultation.
Call (312) 373-0731 to speak directly with our team.
Related Illinois Estate Planning Guides
Mary Liberty — Chicago Estate Planning Attorney
Mary Liberty is a Chicago-based estate planning and probate attorney dedicated to making legal planning accessible, affordable, and stress-free. Through her modern virtual law practice, she helps families and individuals across Illinois create clear, effective plans that protect their assets and their loved ones.
Mary focuses on estate planning, uncontested probate, and her signature partial probate service. Known for her precision, empathy, and plain-language guidance, she operates on a 100% flat-fee model so clients always know exactly what to expect.
Disclaimer: This article is for informational purposes only and does not constitute legal advice. No attorney-client relationship is created by reading this content. Illinois trust and probate law is complex and fact-specific — the roles and responsibilities of executors and trustees vary by the terms of each document and the specific circumstances of each estate. Consult a licensed Illinois attorney for guidance tailored to your situation.
Ready to Build an Estate Plan With the Right People in Every Role?
Book a free consultation with Illinois Estate Law and put a clear, complete plan in place — the right executor, the right trustee, and every asset protected.
You Might Also Like
Special Needs Trusts in Illinois: A Complete Guide for Families
Learn how a special needs trust preserves SSI and Medicaid for a disabled loved one in Illinois, the key differences between trust types, and how to set one up.
Read MoreRevocable vs. Irrevocable Trust: Which Is Right for You in Illinois?
Understand the key differences between revocable and irrevocable trusts in Illinois and discover which type fits your estate planning goals with our interactive comparison tool.
Read MoreAdvantages and Disadvantages of Revocable Living Trusts in Illinois
Explore whether a revocable living trust is the right choice for your Illinois estate plan.
Read More