Illinois end-of-life planning guide: probate, advance directives, and what families need to know

End-of-life planning looks largely the same from state to state in spirit — a will, an advance directive, a power of attorney — but the details that govern how those documents work, who can serve in what role, and how your estate moves through the legal system vary considerably. Illinois has its own statutes, its own court procedures, and its own quirks that families and planners need to understand.

This guide covers the key Illinois-specific rules so you know exactly what's required in this state and what options are available to you.

How Illinois probate works

Probate in Illinois is governed by the Illinois Probate Act of 1975 (755 ILCS 5/). When someone dies with assets titled solely in their name, those assets typically must pass through probate — a court-supervised process that validates the will, appoints an executor, pays creditors, and distributes what remains to heirs.

In Illinois, probate is handled by the Circuit Court in the county where the deceased was domiciled at the time of death. For example, if someone lived in Cook County, the family files a probate petition with the Cook County Circuit Court's Probate Division. Each county has its own Circuit Court, and procedures can vary slightly from county to county.

Small estate affidavit: Illinois offers a simplified option for smaller estates. If the total gross value of a deceased person's personal property (not real estate) is $100,000 or less, an heir or successor can use a small estate affidavit to transfer that property without opening a formal probate case. This threshold applies only to personal property — real estate titled solely in the deceased's name still requires probate regardless of value unless it's held in a trust or passes by other means (joint tenancy, transfer-on-death deed).

Independent administration: Illinois also allows for "independent administration," a streamlined version of probate in which the executor can administer the estate with minimal court supervision. This is available when all beneficiaries and heirs agree — and it can significantly reduce the time and cost of closing an estate compared to supervised administration.

For a broader walkthrough of what probate involves and the typical stages, see the guide on how probate works.

What makes a will valid in Illinois

For a will to be valid in Illinois, it must meet these requirements:

• The person making the will (the testator) must be at least 18 years old and of sound mind
• The will must be in writing
• The testator must sign the will (or direct another person to sign it in their presence if they are physically unable)
• The will must be signed in the presence of two credible witnesses, who must also sign the document

Illinois does not recognize holographic wills — that is, handwritten wills that lack witness signatures. A document that is entirely handwritten and signed by the testator but has no witnesses is not a valid will in Illinois. This is a meaningful difference from states like California and Texas, which do recognize holographic wills under certain conditions.

Self-proving affidavits are permitted in Illinois, which allow the will to be admitted to probate without requiring the witnesses to appear in court and verify their signatures.

Executor requirements: Illinois law allows any person who is at least 18 years old and of sound mind to serve as executor. The law does not require the executor to be an Illinois resident, though courts may look favorably on an in-state executor for practical reasons. Non-residents can serve but may be required to post a bond unless the will specifically waives the bond requirement.

Trusts in Illinois

Revocable living trusts are a common estate planning tool in Illinois, often used to avoid probate entirely. Assets transferred into a properly funded trust do not have to pass through the Circuit Court — they distribute directly according to the trust's terms after the grantor's death.

Illinois does not have a separate trust certification statute comparable to some other states, but trustees can typically provide a "certificate of trust" — a document summarizing the trust's basic terms — to financial institutions and other third parties without revealing the entire trust document.

If you're considering a trust as part of your broader estate plan, the estate planning checklist covers the documents and decisions involved.

Advance directives in Illinois

Illinois recognizes two principal advance directive documents:

The Illinois Living Will Declaration is governed by the Illinois Living Will Act (755 ILCS 35/). It allows you to state in writing that you do not want death-delaying procedures used if you have a terminal condition and death is imminent. The declaration must be signed in the presence of two witnesses. It has a relatively narrow scope — it applies specifically to terminal conditions and does not address every end-of-life scenario.

The Healthcare Surrogate Act (755 ILCS 40/) provides a default framework that kicks in when someone lacks decision-making capacity and has no advance directive and no designated healthcare agent. Under this law, Illinois establishes a priority list of surrogates who can make medical decisions — beginning with a spouse, then adult children, then parents, siblings, and so on. Knowing this hierarchy matters if you have no formal healthcare proxy in place.

POLST in Illinois: Illinois uses the POLST (Practitioner Orders for Life-Sustaining Treatment) form — an actionable medical order, distinct from an advance directive, that documents specific treatment preferences for people with serious illness or frailty. Unlike a living will, a POLST is signed by a physician and travels with the patient as a medical order that emergency responders and healthcare facilities are required to follow. The Illinois Department of Public Health (IDPH) maintains a POLST registry for Illinois residents.

For a clear explanation of how advance directives differ from one another, see advance directive vs. living will.

Power of attorney in Illinois

Illinois uses a statutory form for healthcare decision-making called the Illinois Statutory Short Form Power of Attorney for Health Care, authorized under the Illinois Power of Attorney Act (755 ILCS 45/). This document designates an agent to make medical decisions on your behalf if you become unable to do so. It is more comprehensive than a living will — your agent can respond to situations that your written document didn't anticipate.

Key requirements for a valid healthcare POA in Illinois:

• Must be signed by the principal (the person granting the authority)
• Must be witnessed by one witness (who is not the designated agent and meets other eligibility requirements)
• Does not require notarization, though notarization can be added

For a financial durable power of attorney — which allows someone to manage financial and property matters on your behalf — Illinois also uses a statutory short form. Durable POAs remain effective even if the principal becomes incapacitated, which is their essential purpose in end-of-life planning.

For a fuller explanation of how power of attorney works in end-of-life contexts, see the guide on power of attorney for end-of-life planning.

Funeral and burial regulations in Illinois

Who controls burial decisions: In Illinois, the right to control the disposition of a deceased person's remains is governed by the Disposition of Remains Act (755 ILCS 65/). The Act establishes a priority list of who has decision-making authority — beginning with a person the deceased designated in writing, then a spouse or civil union partner, then adult children, parents, siblings, and other relatives.

This matters enormously when family members disagree. If you want to ensure your burial or cremation wishes are honored — especially if you have preferences that might surprise family members — designating someone in writing is the most reliable protection.

Prepaid funeral contracts: Illinois regulates prepaid funeral and burial arrangements under the Illinois Funeral or Burial Funds Act (225 ILCS 45/). Providers who accept prepaid funds must deposit them into a qualifying trust or financial instrument. Consumers have the right to cancel a prepaid contract within 30 days for a full refund. If the funeral home goes out of business, the funds should remain protected in trust.

Funeral directors and crematories in Illinois are licensed and regulated by the Illinois Department of Financial and Professional Regulation (IDFPR).

Key Illinois state agencies and contact information

• Illinois Department of Public Health (IDPH): Maintains the Illinois advance directive registry and the POLST registry. Website: dph.illinois.gov
• Illinois Department of Financial and Professional Regulation (IDFPR): Oversees funeral directors, funeral homes, and crematories. Website: idfpr.illinois.gov
• Illinois Attorney General's Office: Handles consumer complaints about funeral homes and prepaid funeral contracts. Website: illinoisattorneygeneral.gov
• Circuit Court (county-level): Handles probate. Search for the specific court by the county where the deceased was domiciled. Cook County Probate Division: cookcountyclerkofcourt.org

What's different about Illinois compared to other states

A few things stand out as distinctly Illinois:

No holographic wills. Unlike many U.S. states — including neighboring Indiana and Wisconsin — Illinois does not recognize handwritten wills that lack witnesses. A handwritten note expressing your wishes is not a valid will under Illinois law, no matter how clearly written or signed.

The small estate threshold is relatively high at $100,000. Many states set this floor significantly lower. Illinois's $100,000 threshold means more estates can avoid full probate proceedings using the simplified affidavit route.

The Healthcare Surrogate Act creates a default decision-making chain. In states without a comparable statute, families may end up in a more ambiguous situation when someone becomes incapacitated without a healthcare proxy in place. Illinois's surrogate law provides structure — though it may not reflect your preferences if you've never named an agent.

POLST is distinct from the living will. The Illinois Living Will Declaration has a narrower scope than POLST. For people with serious or advanced illness, a POLST completed with their physician is often more actionable in a medical emergency than a living will alone.

Frequently asked questions

Does a will in Illinois need to be notarized?

No. A will in Illinois does not need to be notarized to be valid. What it does require is the signatures of two credible witnesses who were present when you signed (or acknowledged signing) the will. Notarization can be added to create a "self-proving will," which makes the probate process smoother by eliminating the need for witnesses to appear in court, but notarization is not a validity requirement in Illinois.

What happens if someone dies in Illinois without a will?

If someone dies intestate (without a valid will) in Illinois, their estate is distributed according to the Illinois Probate Act's intestacy provisions. Generally, the estate passes to the surviving spouse and children first. If there is no spouse or children, it passes to parents, then to siblings and their descendants, and so on. The court appoints an administrator to handle the estate, following the same basic probate process that would apply to a testate (will-based) estate.

Can I designate someone to make medical decisions for me if I become incapacitated?

Yes. The Illinois Statutory Short Form Power of Attorney for Health Care allows you to designate an agent who can make medical decisions on your behalf. If you become unable to communicate your wishes, your agent can speak with physicians and healthcare facilities and make decisions consistent with your values and any instructions you've provided. This is separate from a living will, which records your specific preferences rather than authorizing someone to make judgment calls.

Is a living trust useful in Illinois to avoid probate?

Yes, and it's a common strategy. A revocable living trust can hold your assets during your lifetime and distribute them to your beneficiaries after your death without going through probate. For families with significant real estate holdings or who want privacy (probate is a public process), a trust can offer real advantages. There are upfront legal costs to create and properly fund a trust, so it's worth evaluating whether those costs are justified given the size and complexity of your estate.

What is the role of the Illinois Department of Public Health in advance directives?

IDPH maintains the Illinois Advance Directive Registry, where residents can register their living will declarations or healthcare POAs. Healthcare providers can access the registry to check whether a patient has a registered document. Registration is voluntary — your documents are valid whether or not they're registered — but registration can help ensure your wishes are found quickly in a medical emergency.

What Passings Can Help With

Illinois residents can use Passings to organize their end-of-life planning documents, record preferences for funeral and burial arrangements, and create a structured plan that survivors can follow. The end-of-life documents checklist covers the core documents — will, advance directive, healthcare POA, financial POA — that every Illinois household should have in place. Passings also connects families with Illinois estate attorneys and funeral providers who can help with state-specific requirements.

This article provides general information and is not legal, financial, or medical advice. Illinois statutes are subject to change — consult an Illinois-licensed attorney for advice specific to your situation.

Disclaimer — For informational purposes only

This article is compiled from publicly available resources and is provided solely for general informational purposes. It does not constitute and should not be relied upon as legal, financial, tax, insurance, medical, psychological, or other professional advice. Passings is a planning and organizational platform, not a licensed advisory service, and no attorney-client, financial advisor-client, or other professional relationship is created by reading this content.

Laws, regulations, financial products, and professional standards vary by state and change over time. Passings makes no representations or warranties — express or implied — regarding the accuracy, completeness, timeliness, or suitability of any information contained herein. To the fullest extent permitted by applicable law, Passings disclaims all liability for any loss, damage, or harm arising from your use of or reliance on this content. Always consult a qualified, licensed professional — including an attorney, financial advisor, CPA, or licensed counselor — before making decisions specific to your situation.

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