Updated August 4, 2026. Quick answer for Kentucky: Kentucky sorts every beneficiary into one of three classes. Class A — spouse, parent, child, grandchild, brother, sister — pays nothing at all. The trap is in Class B: a niece by blood is Class B, but a niece by marriage is Class C, and pays more.
This is not the estate tax, and the difference decides who pays
An estate tax is charged to the estate on its whole value before anything is distributed. An inheritance tax is charged to each beneficiary on what they personally receive, at a rate set by how they were related to the person who died. Two people inheriting equal shares of the same estate can owe completely different amounts. The full comparison, and which states levy which, is on inheritance tax by state.
The three classes
| Class A — exempt | surviving spouse, parent, child, grandchild, brother, sister, half-brother, half-sister. If the date of death is after June 30, 1998, all Class A beneficiaries are exempt from Kentucky inheritance tax. |
|---|---|
| Class B — $1,000 exemption, 4% to 16% | niece, nephew, half-niece, half-nephew, daughter-in-law, son-in-law, aunt, uncle, great-grandchild. $1,000 exemption, tax rate 4 percent to 16 percent. NOTE: nieces and nephews by marriage and great-nieces and great-nephews are Class C. |
| Class C — $500 exemption, 6% to 16% | all persons not included in Class A or Class B. Cousins are Class C. $500 exemption, tax rate 6 percent to 16 percent. |
Classes, exemptions and rate ranges: Kentucky Department of Revenue, Guide to Kentucky Inheritance and Estate Taxes (92F101). Both outer classes are graduated tables rather than flat rates.
The by-marriage distinction is the one that surprises families: your brother’s daughter is Class B, and your late husband’s brother’s daughter is Class C. Great-nieces and great-nephews are Class C too, even by blood. Cousins are Class C.
There is no Kentucky estate tax
Since January 1, 2005, there has been no Kentucky estate tax.
— Kentucky Department of Revenue
Two payment rules worth money
If the inheritance tax is paid within nine months of date of decedent’s death, a 5 percent discount is allowed.
— Kentucky Department of Revenue
if the beneficiary’s net inheritance tax liability exceeds $5,000 and the return is filed timely, an election can be made to pay the tax in 10 equal annual installments. The first installment is due at the time the return is filed. The portion of the tax deferred is charged with interest at the rate established by law beginning 18 months after the date of death.
— Kentucky Department of Revenue
Nine months for the discount rather than three, unlike Pennsylvania. And the instalment election is genuinely useful where the inheritance is property rather than cash — ten annual payments, with interest running only from 18 months after the death, which gives a beneficiary a year and a half before the deferred portion starts costing anything.
What actually reduces this
Inheritance tax is charged on what passes to a beneficiary, so the levers are about who receives and how, not about shrinking the estate at the last minute. Assets with a named beneficiary or a survivorship feature still count in most of these states — do not assume a transfer-on-death designation escapes it. The instruments themselves: transfer-on-death deeds by state, and the beneficiary-designation mistakes that cost the most. If probate is the live question rather than the tax, what probate costs in Kentucky is the arithmetic on that side.
Rates and exemptions read at the state’s own revenue department or statute and cited above, not legal or tax advice. Inheritance tax turns on a relationship and a date of death this page cannot see, and legislatures change these figures — check the current year before you act on a number. We sell nothing on this page and earn nothing from it.