Illinois does not require you to use a lawyer to make a will, and a will you write yourself is fully valid if it meets the statutory formalities. The real question is not whether do-it-yourself is legal — it is whether your situation is one where the predictable failure modes are unlikely to bite. This page sets out what Illinois law requires, what actually goes wrong with self-prepared plans, and where the line sits.
What Illinois law requires of a will
A valid Illinois will must be in writing, signed by the testator, and attested by two credible witnesses (755 ILCS 5/4-3). The will may be signed by someone else at the testator’s direction and in the testator’s presence. Notarization is not required for validity, though a notarized self-proving affidavit makes the will considerably easier to admit to probate later, because the witnesses need not be located and produced.
Illinois does not recognize a handwritten will that lacks two witnesses. A holographic will that would be valid in another state will generally fail in Illinois, which is a common and expensive surprise for families who relied on one.
What goes wrong with do-it-yourself plans
The failures cluster into four patterns, and none of them are visible while you are alive.
- The unfunded trust. By a wide margin the most common and most costly. A trust is signed but the house is never deeded into it and the accounts are never retitled. An unfunded trust avoids no probate at all, and the family ends up paying for both a trust and a probate.
- Execution defects. One witness instead of two, a witness who is also a beneficiary, or signatures gathered at different times and places. These are discovered when the will is offered for probate, at which point they cannot be cured.
- Beneficiary designations that override the will. Retirement accounts and life insurance pass by designation, not by will. A will leaving everything to current family does not touch a 401(k) still naming an ex-spouse.
- Unnoticed Illinois estate tax exposure. Illinois imposes its own estate tax with a $4 million exclusion that is not indexed for inflation and, unlike the federal exemption, is not portable between spouses. A couple leaving everything outright to the survivor can waste the first spouse’s exclusion entirely. Illinois has no inheritance tax. These figures change — verify current law.
When do-it-yourself is genuinely reasonable
A self-prepared will is a defensible choice when the estate is small and the plan is simple. Specifically: no real estate held in your sole name, sole-name personal property comfortably below the $100,000 threshold that triggers Illinois probate, everything passing outright to a spouse or to adult children in equal shares, no blended family, no beneficiary who cannot manage money, and no realistic Illinois estate tax exposure. Where a personal estate is $100,000 or less and no real estate needs to transfer, an Illinois small estate affidavit can often move the assets without any probate case at all.
When it stops being reasonable
Add any one of these and the cost of getting it wrong rises steeply: real estate in your sole name, a business interest, a blended family or children from a prior relationship, a beneficiary with a disability or receiving means-tested benefits, a beneficiary you do not want receiving assets outright, property in more than one state, an estate approaching $4 million, or any expectation that someone will be unhappy enough to contest. Each of these has a standard drafting solution and a standard way of failing without one.
The middle option most people do not know exists
You can draft it yourself and have an attorney check it. This firm reviews self-prepared documents for a flat $500 for an individual and $750 for a couple: an attorney reads what you drafted, confirms it satisfies Illinois execution requirements, and tells you plainly what it does and does not accomplish. It is not the same as having the plan drafted for you, but it catches the execution and funding failures that make DIY documents collapse.
For comparison, a drafted will package is $1,250 for an individual and $1,750 for a couple; a trust package is $3,500 and $5,000 respectively. All are flat fees quoted before you commit.
Frequently asked questions
Can I write my own will in Illinois?
Yes. Illinois does not require you to use a lawyer, and a will you write yourself is valid if it meets the statutory formalities: it must be in writing, signed by you (or by someone else at your direction and in your presence), and attested by two credible witnesses (755 ILCS 5/4-3). Notarization is not required, though a self-proving affidavit makes the will easier to admit to probate later. Illinois does not recognize handwritten wills that lack the two witnesses, so a holographic will valid in some other states will generally fail here.
Do I need a lawyer for probate in Illinois?
No Illinois statute requires an executor or administrator to hire counsel, but the role carries fiduciary duties and personal liability that most people underestimate. A representative who distributes assets before the six-month creditor claims period closes, misses a required notice, or files an inaccurate inventory can be held personally responsible for the shortfall. Some Illinois circuit courts also expect a represented estate in practice. Self-representation is most realistic where the estate is small, the heirs agree, and no real estate is involved.
What goes wrong most often with do-it-yourself estate plans in Illinois?
The most common failure is an unfunded trust — a trust that was signed but never had the house deeded into it or the accounts retitled, which avoids no probate at all and leaves the family paying for both a trust and a probate. The next most common are execution defects (missing or interested witnesses), beneficiary designations on retirement accounts and life insurance that quietly override what the will says, and Illinois estate tax exposure that goes unnoticed because the Illinois exclusion is $4 million, is not indexed for inflation, and is not portable between spouses. None of these are discovered while you are alive; they surface when your family can no longer fix them.
When is do-it-yourself estate planning genuinely reasonable in Illinois?
A do-it-yourself will can be a defensible choice when the estate is modest and the plan is simple: no real estate held in your sole name, total sole-name personal property comfortably under the $100,000 threshold that triggers probate, everything passing outright to a spouse or to adult children in equal shares, no blended-family or special-needs considerations, and no Illinois estate tax exposure. Add real estate, a business, a beneficiary who cannot manage money, a child from a prior relationship, or an estate approaching $4 million, and the cost of getting it wrong rises sharply.
Is there a middle option between doing it yourself and full representation?
Yes. This firm reviews documents you prepared yourself for a flat $500 for an individual and $750 for a couple — an attorney reads what you drafted, confirms it satisfies Illinois execution requirements, and tells you plainly what it does and does not accomplish. For comparison, a drafted will package is $1,250 for an individual and $1,750 for a couple, and a trust package is $3,500 and $5,000 respectively. A review is not the same as having the plan drafted for you, but it catches the execution and funding failures that make DIY documents collapse.
Does having a will avoid probate in Illinois?
No, and this is the single most common misconception in Illinois estate planning. A will is the instrument that governs a probate estate, not a substitute for one — it tells the court who inherits and who administers the estate, but the estate still goes through probate if the assets require it. What actually avoids probate is a funded revocable living trust, a valid beneficiary designation, joint tenancy with right of survivorship, or a recorded transfer on death instrument for real property.
Related
- Illinois wills
- Illinois revocable living trusts
- Illinois estate law answers
- Flat-fee vs. hourly probate in Illinois
- All services and pricing
Not sure which side of the line you are on?
Consultations are free. If your situation is simple enough to handle yourself, we will tell you that.
This page is general information about Illinois law, not legal advice, and does not create an attorney-client relationship.