I want to be fair about this up front: doing something is better than doing nothing, and I'd rather see a family with a flawed plan than no plan at all. So if you filled out an online will at the kitchen table one Sunday afternoon, you were trying to do the right thing. Good.
But here's the part that doesn't show up in the checkout cart. The mistakes in do-it-yourself estate plans almost never surface while you're alive to fix them. They surface after you're gone, when your family is grieving and suddenly facing a problem you never knew you'd left behind. By then the form is signed, the website has your money, and the people who have to clean it up are the ones you were trying to protect.
I've spent a lot of years in probate court watching exactly that happen. The errors repeat themselves. Let me walk you through the ones I see most, so you at least know what to look for in whatever plan you've got.
The Execution Problem — Signing It Wrong
This is the one that catches people first, and it's brutally simple. A will isn't valid just because you wrote it and signed it. Illinois law has formal requirements for how a will must be signed and witnessed, and if you miss them, the document may be worth nothing at all.
Under Illinois law, a will generally must be in writing, signed by the person making it, and witnessed by two credible witnesses who sign in the testator's presence. Those witnesses shouldn't be people who inherit under the will — a beneficiary serving as a witness can jeopardize their own gift. Online forms hand you instructions, but they can't stand in your living room and make sure you followed them. I have seen wills tossed out because they were signed in front of one witness, or signed by witnesses on a different day, or witnessed by the very people named to inherit.
When a will fails on a technicality, the law treats it as though it never existed. Your estate then passes under Illinois's intestacy rules — a one-size-fits-all formula written by the legislature, not by you. Everything you intended goes out the window over a signature line.
The Unfunded Trust — A Binder Full of Good Intentions
Plenty of DIY services now sell trust packages, and a trust can be a fine tool. But a trust only controls the assets that are actually titled into it. Putting assets into the trust — funding it — means retitling your house deed, your bank and brokerage accounts, and so on into the name of the trust.
The forms create the trust. They do not retitle your house. They do not call your bank. That part is on you, and it's the part people skip, because nobody warned them it was the whole point.
The result is heartbreaking and common: a family finds Mom's trust after she passes, beautifully printed and signed, and then discovers every asset is still in Mom's individual name. The trust is empty. It controls nothing. And the estate goes through probate anyway — the precise outcome the trust was bought to avoid. An unfunded trust gives a family false confidence and zero protection. If you have a trust, the most important question isn't "is it signed?" It's "what's actually titled into it?"
Beneficiary Designations That Fight Your Will
Here's a wrinkle that surprises almost everyone: your will does not control your life insurance, your retirement accounts, or any account with a named beneficiary or a payable-on-death designation. Those assets pass directly to whoever is named on the form, no matter what your will says.
So picture this. You write a careful will leaving everything equally to your three children. But your 401(k) still names your ex-spouse from fifteen years ago, because you never updated it. The 401(k) doesn't read your will. It pays your ex. There's nothing your kids can do about it.
DIY plans are especially prone to this because they treat the will as the whole picture and never prompt you to reconcile your beneficiary forms with it. A real plan coordinates the two. Every so often — and certainly after a marriage, divorce, birth, or death — you should pull every beneficiary designation you have and make sure each one still says what you'd want it to say.
No Incapacity Documents at All
Most DIY estate planning is fixated on death and forgets about the years that might come before it. That's a serious gap, because the documents that protect you while you're alive are arguably the ones you're most likely to need.
If you're in an accident or develop a serious illness and can't make decisions, two questions come up immediately: who pays your bills and manages your money, and who makes your medical decisions? In Illinois those are answered by a financial power of attorney and a healthcare power of attorney. Without them, your family may have to petition a court to be appointed your guardian — a public, expensive, and stressful proceeding, at the worst possible time.
A lot of online will packages don't include these documents, or include generic versions that don't track Illinois's statutory forms. A complete plan handles incapacity as squarely as it handles death. Leaving it out isn't a small omission; it's the difference between your spouse signing a form and your spouse hiring a lawyer to go to court.
Tax and Title Oversights
DIY forms are built for the average case, and they assume your situation is simple. Sometimes it isn't, and the form has no way of knowing.
Illinois has its own estate tax, separate from the federal one, with an exclusion of $4,000,000 — and, unlike the federal system, Illinois does not allow portability between spouses. That no-portability rule means a married couple approaching that combined threshold can accidentally waste one spouse's exclusion entirely without planning that's deliberately drafted to capture it. A generic online form won't build that in, because it doesn't know your net worth or that you live in a state with its own estate tax.
The same blind spot applies to other situations a form can't see: a child with special needs whose inheritance could disqualify them from benefits, a blended family with children from prior marriages, a family business or farm, jointly titled property that passes outside your will regardless of what it says. None of these fit a fill-in-the-blank template, and each one can quietly undo the plan you thought you had.
Why This Matters More Than the Price Tag
The appeal of DIY is obvious — it's cheap and it's fast. The hidden cost is that an estate plan is the rare purchase where you never find out whether it worked, because the test comes after you're gone. Every mistake above is invisible until the moment it isn't, and at that moment you're not there to fix it.
The good news is that none of these problems are exotic. They're predictable, and they're preventable. A proper plan does the boring, unglamorous things a form can't: it makes sure the will is executed correctly, the trust is actually funded, the beneficiary designations agree with everything else, the incapacity documents exist, and the whole thing accounts for Illinois law and your particular family.
If you've got a DIY plan and you're not sure it holds up, the smart move is a review — not to sell you something, but to find the gaps while they can still be fixed. Take a look at our estate planning overview, and if you'd like another set of eyes on what you've put together, that's exactly what we do for families across Bloomington-Normal and Central Illinois.
Understanding. Answers. Direction. A good plan should give you all three — and survive the day your family actually needs it.