A will controls who inherits your property and who raises your minor children, and it goes through probate. A revocable living trust controls only assets retitled into it; those avoid probate; unfunded assets do not. Many Illinois residents use both. Illinois also raised its small estate affidavit threshold to $150,000 for deaths on or after August 15, 2025, letting more modest estates skip full probate.
Will vs. Trust in Illinois: Quick Comparison
Each row below answers a specific question on its own. Read any single row without the rest of the table and it should still make sense.| Factor | Will | Revocable Living Trust |
|---|---|---|
| When it takes effect | Only after death | During your lifetime, and continues after death |
| Assets controlled | Only assets in your name at death that the will directs | Only assets retitled into the trust’s name |
| Guardian nomination for minor children | Yes — the only document that can do this | No — a trust cannot nominate a guardian |
| Person appointed to carry out instructions | Executor, appointed by the probate court | Successor trustee, named in the trust document |
| Probate involvement | Goes through the Illinois probate process | Properly funded trust assets bypass probate; unfunded assets do not |
| Privacy | Filed with the court; becomes part of the public probate record | Not filed with a court; trust terms generally stay private |
| Incapacity planning | Provides no authority while you are alive | Successor trustee can manage trust assets if you become incapacitated |
| Funding requirement | None — a will governs assets already in your name | Requires retitling assets into the trust’s name to have effect |
| Ability to amend or revoke | Can be amended or revoked any time before death, following Illinois’s will formalities | Can be amended or revoked any time while the person who created it (grantor) is alive and has capacity |
| Small estate affidavit interaction | May allow a qualifying estate to skip full probate under 755 ILCS 5/25-1, as amended | Not needed for assets already held in a properly funded trust |
What Is the Difference Between a Will and a Trust in Illinois?
A will is a document that takes effect at death and directs the probate court on who inherits your property and who raises your minor children. A revocable living trust is a legal arrangement that takes effect as soon as you sign and fund it, and it controls only the specific assets you have retitled into the trust’s name during your lifetime. Illinois law treats these as two separate legal tools with separate formal requirements: will execution is governed by 755 ILCS 5/4-3, and trust creation, modification, and trustee duties are governed by the Illinois Trust Code, 760 ILCS 3/. Many Illinois residents use both, since a trust does not replace every function a will performs.
What Does an Illinois Will Control?
An Illinois will controls the distribution of assets titled in your name at death and names a guardian for your minor children. Under 755 ILCS 5/4-3, a valid Illinois will must be in writing, signed by the person making it (or by someone else in that person’s presence and at their direction), and signed by two or more credible witnesses who watch the signing take place. A will that meets the requirements of the Uniform International Wills Act also satisfies this section. A will is also the only document under Illinois law that lets you name a guardian for minor children if something happens to you before they turn 18, and it lets you name an executor, the person the probate court appoints to carry out your instructions and administer the estate.
What Does a Revocable Living Trust Control?
A revocable living trust controls only the assets that have been formally retitled into the trust’s name. Illinois trust law is governed by the Illinois Trust Code, 760 ILCS 3/, which addresses how trusts are created, modified, or terminated, the duties trustees owe to beneficiaries, and the rules specific to revocable trusts. With a revocable living trust, the person who creates it typically keeps control of the assets during life and can amend or revoke the trust at any time while they have capacity to do so. A successor trustee named in the trust document takes over management or distribution when the person who created the trust dies or becomes incapacitated, without court appointment.
Does a Trust Avoid Probate in Illinois?
A trust avoids probate only for the specific assets that have been formally retitled into it. Funding means changing the legal owner of an asset from your individual name to the trust’s name: retitling real estate deeds, moving bank and brokerage accounts into the trust’s name, and updating ownership records for business interests. Some assets pass outside a trust entirely by beneficiary designation, including life insurance policies and most retirement accounts, such as 401(k)s and IRAs, which transfer to the named beneficiary regardless of what the trust or will says. A trust that exists on paper but was never funded controls nothing, and the assets it was meant to hold remain subject to probate the same as if no trust existed.
What Happens If a Trust Is Never Funded?
If a trust is never funded, the assets it was meant to hold stay titled in the individual’s name and pass through probate under whatever will (or intestacy law, if there is no will) governs those assets. This is the reason most people who set up a revocable living trust also sign a pour-over will. A pour-over will directs any asset that was never retitled into the trust, whether an account opened after the trust was created, a property skipped during retitling, or a personal item no one thought to list, after death. A pour-over will still has to go through probate for the assets it covers; it acts as a backstop for whatever funding missed. Signing trust documents is the first step in the plan; retitling assets into the trust is the step that determines whether the trust controls anything.
Do Illinois Families Need Both a Will and a Trust?
Most Illinois families who set up a revocable living trust also need a will, because a trust cannot name a guardian for minor children and cannot direct assets that were never funded into it. The will handles guardian nomination and catches unfunded assets through the pour-over provision; the trust handles lifetime management, incapacity planning, and probate avoidance for whatever it holds. Illinois residents with minor children, out-of-state property, multiple properties, or a preference for privacy in how their estate is administered are the group most likely to use both documents together.
How Does the Illinois Small Estate Affidavit Affect the Decision?
The Illinois small estate affidavit lets a personal representative collect and distribute a qualifying estate’s personal property without opening a full probate case, and the threshold for using it changed in 2025. Under 755 ILCS 5/25-1, as amended by Public Act 104-0346, the threshold rose from $100,000 to $150,000 in personal property, and motor vehicles registered with the Illinois Secretary of State are now excluded from that dollar count entirely. This change applies to estates of people who died on or after August 15, 2025; for deaths before that date, the prior $100,000 threshold applies.
The affidavit covers personal property only. Estates that include real estate generally do not qualify for the small estate affidavit process and typically require formal probate for the real property, regardless of the estate’s total value. This is the point where the small estate affidavit and the will-versus-trust decision intersect directly: an estate consisting mainly of a bank account, personal belongings, and a vehicle may now fall under $150,000 once the vehicle is excluded from the count, and could qualify for the simpler affidavit process instead of full probate. An estate that includes a house, by contrast, likely needs either probate or a properly funded trust to move that real estate to heirs outside the probate court, no matter how the rest of the estate’s value compares to the $150,000 figure.
This is why estate value alone does not settle the decision between a will and a trust. Two estates of the same total value can have very different probate exposure depending on whether real estate is involved and how personal property is titled.
Does an Illinois Will Have to Go Through Probate?
Yes. An Illinois estate administered under a will goes through the probate process for any assets the will governs, unless those specific assets qualify for the small estate affidavit or pass by joint ownership or beneficiary designation instead. A will directs the probate court on distribution; it does not, by itself, remove assets from the probate process the way a funded trust or a qualifying small estate affidavit can.
How Long Does Probate Take in Cook County?
Cook County probate is handled through the Circuit Court of Cook County’s Probate Division, and the firm’s own experience with Cook County probate matters puts typical administration at roughly six to twelve months from filing to closing, longer when the estate is contested or when creditor claim periods extend the timeline. During that period, the estate’s assets are generally tied up in the court process before heirs receive them, and probate filings become part of the public court record, meaning the value of the estate and the identity of heirs are generally accessible to anyone who looks up the case. Assets held in joint tenancy, payable-on-death or transfer-on-death accounts, retirement accounts and life insurance with named beneficiaries, and assets properly retitled into a funded trust generally stay outside this Cook County court process and do not carry the same timeline.
Which Estate-Planning Option Fits Your Assets and Family?
The questions below are educational starting points people in different situations tend to consider. Reviewing your specific facts with an attorney is the step that turns these starting points into a plan.
Parents of minor children need a will regardless of any other planning, because only a will can nominate a guardian under Illinois law.
Homeowners and people who own real estate in more than one county or state have a common reason to consider a funded trust, since a trust can hold real property and pass it to heirs without that property going through probate in each jurisdiction where it sits, while the small estate affidavit does not cover real estate at all.
Owners of multiple properties face the same probate exposure multiplied across each property, which is a factor many trust-based plans are built around.
People with out-of-state property face a separate practical issue: real estate located outside Illinois may otherwise require a probate proceeding in that other state in addition to any Illinois probate, a consideration sometimes called multistate real estate planning.
Estates that may qualify for the small estate affidavit, meaning modest personal property estates without real estate, may find that a will paired with the affidavit process meets their needs without the added cost of setting up and funding a trust.
People who want their estate’s administration to stay out of the public court record are a common reason families choose a properly funded trust, since trust administration is not filed with a probate court the way a will is.
People planning for possible future incapacity have a reason to consider a revocable trust, since a successor trustee can step in to manage trust assets without a court-appointed guardianship proceeding, an event a will cannot address, as a will only takes effect at death.
People willing to maintain trust funding over time, including retitling new assets as they are acquired, get the most benefit from a trust; a trust that is signed but not kept funded does not deliver the probate-avoidance benefit described above.
Families who expect disagreement among heirs during administration sometimes weigh the added privacy and structure of trust administration against the more public, court-supervised structure of probate, though either document can be contested.
Talk to a Chicago Estate Planning Attorney
There are three separate next steps depending on where you are in the process. If you are creating or updating an estate plan, whether that means a first will, a revocable living trust, or both, our Chicago estate planning attorney page covers how we help with will drafting and trust formation. If you are already handling a loved one’s estate in Cook County, our Chicago probate attorney page walks through the probate process in more depth, including how the small estate affidavit process may apply. If your situation involves real estate that is caught up in or affected by probate, our post on how to sell a house without probate in Chicago addresses that specific path.
Frequently Asked Questions
Q1. Can a will avoid probate in Illinois?
- No. A will directs the probate court on how to distribute assets; it does not remove those assets from the probate process. Assets a will governs go through probate unless they separately qualify for the small estate affidavit or pass by joint ownership or beneficiary designation.
Q2. Does a revocable trust avoid probate in Illinois?
- Only for the assets properly retitled into the trust’s name. Assets never funded into the trust are not covered and remain subject to probate the same as if the trust did not exist.
Q3. Can a trust name a guardian for minor children?
- No. Under Illinois law, only a will can nominate a guardian for minor children. A trust document has no legal mechanism for guardian nomination.
Q4. What happens to property left outside a trust?
- Property never retitled into the trust stays in the individual’s name and is subject to probate under the governing will (or intestacy law, if there is no will), unless a pour-over will directs it into the trust after death, in which case it still passes through probate before reaching the trust.
Q5. Does every Illinois estate require probate?
- No. Estates that qualify for the small estate affidavit under 755 ILCS 5/25-1, and assets that pass by joint ownership, beneficiary designation, or proper trust funding, can avoid the full probate process.
Q6. What is the Illinois small estate affidavit limit?
- $150,000 in personal property for deaths on or after August 15, 2025, with motor vehicles registered with the Illinois Secretary of State excluded from that count entirely. For deaths before August 15, 2025, the prior $100,000 threshold applies. This is set by 755 ILCS 5/25-1, as amended by Public Act 104-0346.
Q7. Can an Illinois small estate affidavit be used when the estate includes real estate?
- Generally, no. The small estate affidavit process covers personal property. Estates involving real property typically require formal probate for that property regardless of its value.
Q8. Can one estate use both a trust and a small estate affidavit?
- Yes, in different parts of the same estate. Assets already funded into a trust are governed by the trust and do not need the affidavit. Assets left outside the trust, if they qualify under the $150,000 personal property threshold, may be collected using the small estate affidavit instead of full probate.
Q9. Does a trust help if someone becomes incapacitated?
- A properly funded revocable trust allows the successor trustee to manage the trust’s assets if the person who created it becomes incapacitated, without a court-appointed guardianship proceeding over those assets. A will has no function during the creator’s lifetime and provides no incapacity planning.
Q10. Can an Illinois trust hold property located in another state?
- A revocable living trust can hold real property located in another state once that property is properly retitled into the trust’s name, which is one reason people who own real estate outside Illinois consider a trust as part of multistate real estate planning.
Disclaimer: This article provides general legal information about Illinois wills and trusts law. It is not legal advice, and reading it does not create an attorney-client relationship between you and Hampton and Hampton LLP. Your situation may involve facts or circumstances that change how this information applies to you. Speak with a licensed Illinois attorney before making estate planning decisions.