Your net worth at death:
Illinois taxable estate = net worth − funeral & administration costs − charitable deduction. This mirrors the federal taxable estate, which Illinois uses as its own starting point.
| Taxable estate | $0 |
| Less: Illinois exemption | $4,000,000 |
| Adjusted taxable estate (est. − $60,000) | $0 |
| Tax per IL credit-table schedule | $0 |
| Less: tax on $4,000,000 baseline | −$280,400 |
| Illinois estate tax | $0 |
Cross The Line, And They Don't Ease You In
Look, I'll be straight with you. The instant your net worth ticks past $4,000,000, Illinois starts taxing every extra dollar at 10.4% — not some gentle little starter rate. Zero warm-up. A $5,000,000 estate? That's $111,200, gone, just like that. Now here's the good news: we can fix this, with Credit Shelter Trusts and Irrevocable Trusts.
What? 16% Top Rate?
Illinois doesn't slap a flat rate on the amount over $4,000,000 — that'd almost be fair. Instead they dust off an old federal formula from before 2001 (the "state death tax credit" table) and run your whole estate through it. Then they subtract what that formula says a $4,000,000 estate owes. Net result? The dollars above $4,000,000 get taxed at whatever bracket YOUR estate size has already earned — starting at 10.4% and marching up to 16%. No baby steps. No warm-up lap.
Federal Estate Taxes are a separate issue.
Here's some good news, for once: the federal exemption is a lot higher than Illinois's, so most families who owe Illinois estate tax owe Uncle Sam nothing at all. But federal rules change whenever Congress feels like it — so don't take my word for the current number. This tool's only job is showing you the Illinois side of the story.
This is an estimate, not advice
Financial calculator(s) were created with the assistance of Artificial Intelligence (Ai) and was designed as an educational tool only to help you estimate answers to common financial questions. It is not intended to predict future returns or results, nor does it represent the performance of any specific investment or product. The results provided are for informational and educational purposes only and do not constitute financial advice. The accuracy, completeness or applicability of the output is not independently verified, guaranteed, or ensured. Please use the results as a general guide and consult with a qualified financial professional for advice specific to your situation prior to making any changes to your financial strategy or accounts. Neither the firm nor its agents or representatives may give tax or legal advice. Individuals should consult with a qualified professional for guidance before making any purchasing decisions. 8945100 - 9/26