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Question

What is the “cliff” effect in Illinois estate tax?

Answer

Illinois uses a cliff structure, meaning that as soon as an estate exceeds $4 million, the entire estate — not just the amount above the threshold — becomes subject to tax. This is different from the federal system, which taxes only the amount above the exemption.

Related FAQs

Should I use an LLC to hold Illinois real estate if I’m not an Illinois resident?

Does Illinois have an inheritance tax?

Is a will or a trust better for reducing Illinois estate tax?
Tax Planning Estate Planning Asset Protection Trusts Tax Basics Tax Tips & Tricks Protecting Your Legacy Inherited Wealth Generation FAQs
Last Updated Aug. 17, 2026
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