Illinois Estate Tax Calculator
Illinois has its own state estate tax, with an exemption threshold around $4,000,000. Estimate your potential tax below.
⚠️ This is a rough educational estimate only, not legal or tax advice. Estate tax law is complex and depends on your specific situation — consult an estate planning attorney or tax professional.
Does Illinois have an estate tax?
Yes. Illinois is one of a minority of US states — roughly a dozen nationwide — that currently levy their own state estate tax. In Illinois, the approximate exemption threshold is $4,000,000, meaning estates valued below that amount generally owe no state estate tax, while the portion above it can be taxed at rates that approach 16% at the top end. These figures are approximate and subject to change, so confirm current thresholds with Illinois's department of revenue or an estate planning attorney.
How does the federal estate tax fit in?
There is also a federal estate tax, but it only applies above a very high exemption amount (several million dollars per person, adjusted periodically), so it rarely affects most estates in Illinois or elsewhere. Because Illinois's state exemption is generally lower than the federal exemption, some estates end up owing Illinois estate tax even though they owe nothing at the federal level.
How is this estimate calculated?
This calculator uses a simplified flat-rate model: Illinois's approximate exemption threshold is subtracted from your estate value to find the taxable amount, and an approximate top marginal rate is applied to that excess. In reality, most states with an estate tax use graduated brackets, so actual tax owed is typically somewhat lower than this simplified flat-rate estimate suggests. This is a rough educational estimate only, not legal or tax advice — consult an estate planning attorney or tax professional for guidance specific to your situation.
Frequently Asked Questions
Does Illinois have an estate tax?
Yes. Illinois levies its own state estate tax, with an approximate exemption threshold of $4,000,000. Estates below that amount generally owe no Illinois estate tax; the value above it may be taxed at rates up to roughly 16%.
What is Illinois's estate tax exemption threshold?
Illinois's approximate estate tax exemption threshold is $4,000,000. Estates valued below this amount generally owe no state estate tax in Illinois, though this figure is approximate and subject to change — confirm the current threshold with Illinois's department of revenue.
What's the difference between estate tax and inheritance tax in Illinois?
Estate tax is paid by the estate itself based on its total value, while inheritance tax is paid by the person receiving the inheritance and can depend on their relationship to the deceased. Illinois has its own estate tax; check separately whether Illinois or any other relevant state imposes an inheritance tax on heirs.
Does the federal estate tax also apply in Illinois?
The federal estate tax can apply to residents of any state, including Illinois, but only above a very high exemption amount (several million dollars per person). Because the federal exemption is so high, it rarely affects most estates, regardless of whether Illinois also has its own state estate tax.
Is this Illinois estate tax estimate legal or tax advice?
No. This is a rough educational estimate only, not legal or tax advice. Estate tax law is complex and depends on your specific situation — consult an estate planning attorney or tax professional licensed in Illinois before making any decisions.
Can I reduce estate tax exposure in Illinois?
Common estate planning strategies include lifetime gifting, trusts, and marital deductions, but the best approach depends on your assets, family situation, and Illinois's specific rules. An estate planning attorney or tax professional in Illinois can help design a strategy tailored to your circumstances.