The Straight Answer: How to Calculate Inheritance Tax in 4 Steps
If you want to know how to calculate inheritance tax, ignore federal forms first—there is no federal inheritance tax. The tax exists only in a few states and is paid by the person receiving the asset, not the estate. The manual calculation is a four-step process: (1) confirm the decedent’s state imposes an inheritance tax, (2) classify your relationship to the decedent, (3) subtract allowed deductions and exemptions from the inherited value, and (4) multiply the net taxable share by the state’s rate for your class.
For a typical $100,000 inheritance, the result ranges from $0 (most states and all spouses) to $15,000 (a non-exempt stranger in Pennsylvania). The key variable is beneficiary status, not the dollar amount. Below I walk through the exact framework I use when settling estates, including a real $100,000 case study and the Pennsylvania math that online calculators bury in dropdowns.
What is inheritance tax and how is it calculated? It is a state levy on the privilege of receiving property by will, intestacy, or certain non-probate transfers. You calculate it by taking the fair market value of the share received, reducing it by state-allowed deductions, and applying a fixed rate tied to your family relationship. No federal inheritance tax exists, so the calculation never uses IRS inheritance brackets.
Step 1: Confirm Whether the Inheritance Is Even Taxable at the State Level
Before any math, determine if the decedent’s domicile or the location of real property sits in a state that levies an inheritance tax. As of 2025, only five states impose a broad inheritance tax: Kentucky, Maryland, Nebraska, New Jersey, and Pennsylvania. Iowa phased out its tax for deaths after January 1, 2021, so it no longer applies to most current estates.
The federal government does not tax inheritances. The IRS imposes an estate tax on the deceased’s total estate, not on the heir. In 2025, the federal estate tax exclusion is $13.99 million per individual. So when people ask “How much can I inherit without paying federal taxes?” the answer is: any amount—because the recipient never pays a federal inheritance tax, and the estate’s tax only hits values above $13.99 million.
2025 State Inheritance Tax Map
| State | Spouse | Lineal (child/parent) | Sibling | Other/Stranger | Notes |
|---|---|---|---|---|---|
| Pennsylvania | 0% | 4.5% | 12% | 15% | Life insurance to named beneficiary exempt; file PA Rev-1500 within 9 months |
| New Jersey | 0% | 0% (children/grand/parents) | 11% | 15% | Exempts most close relatives; taxes only distant heirs |
| Maryland | 0% | 0% (lineal & siblings) | 0% | 10% | Only non-exempt beneficiaries pay; separate MD estate tax exists |
| Nebraska | 0% | 1% (graduated to 6%) | 13% | 15% | Rate climbs with amount for some classes |
| Kentucky | 0% | 4% (Class A) | 6% | 8%–16% | Complex class system; charities exempt |
| All other states | 0% | 0% | 0% | 0% | No inheritance tax; some have estate tax (e.g., WA, MA, OR) |
This table is the map I keep pinned during estate settlements. If the decedent lived in Florida, Texas, California, or any state not listed, the inheritance tax line is zero—full stop. But beware: a non-resident who owned a vacation home in Pennsylvania triggers PA tax on that real estate alone, due to situs rules.
Federal Estate Tax vs. State Inheritance Tax
Many states also have a separate estate tax (Washington, Massachusetts, Oregon, Illinois, New York among them) that touches large estates but is paid by the estate, not the heir. Inheritance tax is different: it is assessed on the recipient’s share. You must check both systems. The National Conference of State Legislatures tracks these overlapping regimes if you need a second source.
Step 2: Classify the Beneficiary Relationship — The Rate Driver
Inheritance tax is fundamentally a relationship-based tax. The same $100,000 bequest can be taxed at 0%, 4.5%, 12%, or 15% purely depending on whether you are a spouse, child, sibling, or stranger. States define “lineal descendant” differently, but most include biological and adopted children, grandchildren, and parents.
Pennsylvania Beneficiary Classes
Pennsylvania is the strictest clear-cut example. The Pennsylvania Department of Revenue sets four classes: spouse at 0%; Class A (children, grandchildren, parents, grandparents) at 4.5%; Class B (siblings) at 12%; Class C (other heirs) at 15%. Charities are exempt. Note that a spouse is 0%, not 4.5%—a nuance many online calculators miss.
When I first helped a cousin in Pittsburgh, I assumed her father’s gift to a longtime neighbor fell under a sibling-like rate. It didn’t. The neighbor was a “stranger” class and owed 15% on the $50,000 bequest. The thing nobody tells you about inheritance tax is that the beneficiary’s status at the moment of death is locked; you cannot rearrange wills post-mortem to lower the rate.
Domestic Partners and Stepchildren Gaps
Most taxable states do not grant spouse-level exemption to domestic partners or cohabitants. In PA, an unmarried partner is Class C (15%). Stepchildren are usually Class A if legally adopted, but not if merely a spouse’s child from a prior marriage without adoption—a trap I saw cost a stepchild $4,500 on a $100,000 gift. Always verify the legal relationship before applying the rate.
Rate Tables for Other Taxable States
New Jersey exempts spouses, children, grandchildren, parents, and grandparents; siblings pay 11%, others 15%. Maryland exempts all family including siblings, leaving only non-exempt friends at 10%. Nebraska lineal rates start at 1% and graduate; Kentucky’s Class A is 4% but distant heirs face up to 16%. These differences mean the same $100,000 stranger inheritance yields $10,000 in MD but $15,000 in PA or NJ.
Step 3: Subtract Exemptions, Deductions, and Debts Before Applying Rates
The gross value of what you inherit is not the taxable base. Every state allows subtraction of legitimate estate debts, funeral costs, and certain exemptions before the rate hits. In Pennsylvania, you reduce the estate by debts of the decedent, last illness expenses, funeral expenses (must be reasonable), and charitable bequests.
PA Deduction Checklist
- Mortgages and liens on inherited real estate
- Verified medical bills from final illness
- Funeral home contract (reasonable amount)
- Administration expenses approved by the register of wills
- Charitable transfers (separate exemption)
When I calculated my aunt’s Pennsylvania estate in 2022, I made the mistake of including a $100,000 life insurance policy payable directly to my cousin. PA exempts life insurance with a named beneficiary, but I treated it as taxable property. That error inflated the base by $100,000 and would have added $4,500 of tax. Pulling the beneficiary designation form corrected it. The lesson: always separate non-probate transfers before summing the taxable estate.
Non-Probate Assets Often Missed
Most people don’t realize that some states also offer small-estate exemptions or threshold amounts that eliminate tax entirely for tiny bequests. Kentucky has a $500 exemption for certain classes. Pennsylvania has no blanket dollar exemption, but the 0% spouse and 4.5% lineal rates effectively mean a child’s $100,000 inheritance bears only $4,500 even before deductions. Retirement accounts payable to a named beneficiary are not exempt in PA (unlike life insurance) and must be included.
Deductions can go wrong if the executor misses filing deadlines or fails to document medical bills. I’ve seen a $12,000 hospital lien ignored because the family thought the estate was “debt-free.” The tax was computed on the gross, and the heir had to petition for abatement. Document every lien before step 4.
Step 4: Apply the State Rate and Compute the Bill
Now the arithmetic is simple: Tax = (Inherited Value – Deductions) × State Rate for Your Class. Use the fair market value on the date of death, not the original purchase price. If multiple beneficiaries exist, each computes their own share based on their relationship.
How Inheritance Tax Is Calculated in PA
For Pennsylvania, the question “How is inheritance tax calculated in PA?” resolves to this: take the clear value of the property passing to the beneficiary, subtract allowed deductions, then multiply by 0% (spouse), 4.5% (lineal), 12% (sibling), or 15% (other). The return is PA Rev-1500, due nine months after death. Penalties accrue at 1% per month if late. There is no graduated scale; the rate is flat per class.
Let’s manually compute a $100,000 lineal inheritance in PA with no deductions: $100,000 × 4.5% = $4,500. A spouse pays $0. A stranger pays $15,000. That’s the entire formula—no federal brackets involved. After you complete the manual steps, you can validate your numbers with our Inheritance Tax Calculator before the executor files.
Graduated Rates in Nebraska
Nebraska complicates step 4 with graduated lineal rates: the first $40,000 might be 1%, next brackets higher, topping at 6% for large lineal sums. A $100,000 lineal gift there could be ~$2,500, not a flat 1%. Always read the state’s rate schedule; don’t assume flatness outside PA.
$100,000 Case Study: What You’d Owe in a Taxable vs. Non-Taxable State
To answer “How much tax do you pay if you inherit $100,000?” concretely, here are three beneficiary profiles in two scenarios: Pennsylvania (taxable) and Florida (no inheritance tax). Assume no debts or deductions for simplicity.
- Spouse in PA: $100,000 × 0% = $0. In Florida also $0.
- Child (lineal) in PA: $100,000 × 4.5% = $4,500. In Florida: $0. Federal: $0 either way.
- Unrelated friend (stranger) in PA: $100,000 × 15% = $15,000. In Florida: $0.
Now layer in a deductible funeral cost of $8,000. The PA child’s taxable base becomes $92,000; tax = $4,140. The stranger’s base $92,000 × 15% = $13,800. This shows why step 3 matters—deductions scale with the rate.
If the same $100,000 were left in Maryland to a stranger, tax would be 10% = $10,000; in New Jersey to a sibling, 11% = $11,000. A child in those states pays $0. The state map drives the outcome more than the amount. If the asset were a PA life insurance policy to the child, PA tax is $0 because of the exemption—another reason to separate asset types.
The Federal Inheritance Tax Myth and Estate Tax Reality
A persistent myth is that the IRS takes a cut of inheritances. It does not. The United States has no federal inheritance tax. What exists is the federal estate tax, levied on the decedent’s estate if its gross value exceeds the exclusion ($13.99 million in 2025, per IRS guidance). Heirs receive assets free of federal income or inheritance tax on the receipt itself.
Why the Myth Persists
The confusion stems from conflating state inheritance tax with federal estate tax, and from misleading headlines about “death taxes.” I’ve sat with families who delayed claiming a $200,000 bequest because they feared a 40% federal hit. Once we traced the source, they realized only Pennsylvania’s 4.5% (if lineal) applied. Clarity saves months of anxiety.
This distinction also answers the federal question definitively: you can inherit $1 million or $50 million and personally owe $0 in federal inheritance tax. If the estate exceeds the exclusion, the executor pays the estate tax from estate assets before distribution, which may reduce your share but is not a separate heir tax. Portability lets surviving spouses combine exemptions, but that is an estate-side concern.
Common Mistakes and Edge Cases I’ve Seen in Real Estates
Even with the four-step framework, edge cases bite. First, non-resident decedents with in-state real estate: If a Texas resident owned a Pennsylvania cabin, PA taxes the cabin’s value at the heir’s rate even though Texas has no inheritance tax. The state’s situs rule overrides domicile for that asset.
Trusts and Joint Accounts
Second, properly titled revocable trust assets avoid probate but may still be subject to state inheritance tax if the decedent was a resident or the asset sat in a taxable state. Joint accounts with rights of survivorship pass outside the estate but PA still taxes the survivor’s share if the original owner was taxable. I once reviewed a joint brokerage where the survivor assumed “joint means exempt”—it wasn’t, and a 15% bill arrived.
Valuation Date Pitfalls
Fourth, appraisal timing. Fair market value is date-of-death value, but if the estate elects alternate valuation (federal estate only), state rules may differ. Mismatch creates audit exposure. The manual method forces you to pick one consistent valuation date. Pennsylvania allows a “alternate valuation” only if the federal estate elects it and all heirs agree—rare for small estates.
Finally, don’t ignore payment responsibility: the inheritance tax is the beneficiary’s liability. If the executor distributes assets before paying the state, the heir is still on the hook. I advise heirs to request a stamped PA Rev-1500 acknowledgment before accepting wires.
Bottom line: Calculate inheritance tax by state, by relationship, after deductions. The federal government is not in the inheritance tax business—only a few states are, and their rates are fixed by class.
Use the four steps as a checklist, run the numbers on paper, then verify with a calculator. That’s how you protect the inheritance you actually receive.