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Illinois flag2026Rank #45

Illinois Estate and Inheritance Tax

Estate tax only · exempt ~$4M · top 16%. See federal interaction, planning checklist, and heir estimates for Illinois.

By Sammy S. · Founder · AuthorUpdated for 2026

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Illinois estate and inheritance tax snapshot

Illinois levies a state estate tax with an exemption of about $4M and a top rate near 16%. No separate inheritance tax. Rank #45 on this site's death-tax friendliness score (#1 is most favorable).

Category

Estate tax only

Estate exemption

$4M

Top estate rate

16%

Inheritance tax

No

Friendliness rank

#45

vs federal exemption

State lower

Who should care about Illinois death taxes

Residents & domicile planners

People domiciled in Illinois (estate tax only) should model state rules alongside federal estate tax.

Nonresident property owners

Owning a home, land, or condo in Illinois can create situs-based filing even if you live elsewhere.

Executors & heirs

Heirs generally face no Illinois inheritance tax; executors may still need federal forms or other-state situs returns.

Compare Illinois with another state

Compare any two states

Estate tax, inheritance tax, exemptions, and federal interaction.

Illinois estate and inheritance tax examples

Estate rows use an illustrative top-rate sketch on amounts above the modeled exemption (actual brackets are progressive). This state has no inheritance tax—heir estimates are $0 at the state level.

$2M estate

Excess above $4M × top 16% (illustrative)

Amount
$2M
Result
$0 illustrative

$5M estate

Excess above $4M × top 16% (illustrative)

Amount
$5M
Result
~$160,000 illustrative

$10M estate

Excess above $4M × top 16% (illustrative)

Amount
$10M
Result
~$960,000 illustrative

Estate tax in Illinois

Yes — exemption about $4M, top rate near 16%

Approx. exemption
$4M
Top estate rate
16%

Illinois’s estate exemption is $4M; there is no state inheritance tax. Most states do not offer federal-style portability of unused estate exemption to a surviving spouse.

Inheritance tax in Illinois

Illinois does not currently levy a state inheritance tax on beneficiaries. The inheritance tax calculator will show $0 for this state.

Federal estate tax and Illinois

There is no federal inheritance tax. Federal estate tax may still apply above about $15M per person in 2026 (top rate 40%), regardless of Illinois rules. Illinois's state exemption ($4M) is lower than the federal figure, so state tax can apply when federal does not.

Federal estate tax

About $15M exclusion · 40% top rate

Illinois estate tax

Exempt ~$4M · top 16%

Illinois inheritance tax

None

Illinois estate and inheritance tax checklist

Practical steps before you relocate, update beneficiary forms, or estimate what heirs might owe in Illinois.

Confirm domicile and situs

Your Illinois exposure depends on domicile for most intangibles and situs for real estate. Document where you live and where titled property sits.

Stack federal and state

Illinois's ~$4M exemption can bind before the ~$15M federal exclusion—model both layers.

Heir estimates are $0 here

Illinois does not levy inheritance tax. Use the calculator only to confirm $0, then check estate-tax states if assets sit elsewhere.

Review beneficiary designations

Retirement accounts and life insurance often bypass probate but can still matter for Illinois inheritance tax (where applicable) and federal estate inclusion.

Compare neighboring states

Open related Illinois comparisons below—small exemption gaps compound for mid-size estates and multi-home families.

Confirm $0 inheritance tax in Illinois

Illinois has no state inheritance tax. The calculator still opens pre-selected to Illinois so you can confirm a $0 heir estimate.

Open Illinois inheritance tax calculator

Related states by death-tax friendliness

All state rankings→Compare any two states→

Illinois estate and inheritance tax FAQs

Yes. Illinois’s modeled estate exemption is about $4M with a top rate near 16%.

No. Illinois does not impose a state inheritance tax on beneficiaries.

Federal estate tax uses an exemption of about $15M and a top rate of 40%. Illinois’s state exemption ($4M) is lower, so state tax can apply when federal does not.

Illustratively, taxing the $1.00M excess above $4M at the 16% top rate suggests about $160,000—actual brackets are progressive, so treat this as an upper-bound sketch only.

Illinois ranks #45 (lower score is more heir/estate-friendly). Category: Estate tax only.

Real property is generally taxed where it sits (situs). A home located in Illinois can create Illinois estate or inheritance tax exposure even if the decedent was domiciled in another state. Intangibles usually follow domicile.

Domicile in Illinois can subject the taxable estate or heirs to Illinois rules (estate tax only). Confirm domicile change timing and any look-back or situs rules with counsel.

Illinois has no inheritance tax on heirs. Transfers to a surviving spouse are often sheltered under marital deduction rules, but confirm Illinois estate-tax forms and any QTIP elections with counsel.

Most estate-tax states, including Illinois in this model’s planning notes, do not mirror federal DSUE portability. Couples should not assume unused Illinois exemption automatically transfers to a surviving spouse.

Owners of mid-size estates near or above $4M, nonresidents with Illinois real estate, and couples who need state-specific credit-shelter planning.

Illinois has no inheritance tax; the calculator will show $0 for this state. Use Estate & Inheritance Tax by State for estate-tax exemptions elsewhere.

Confirm current Illinois revenue department figures and situs rules. Rankings are educational planning aids.