Estate Tax Calculator · Practical guide
How Much Estate Tax on 15 Million Dollars?
A $15 million estate with no deductions owes about $344,800 in federal estate tax in 2026 — an effective rate of just 2.30%.
At a glance
The Short Answer
A $15 million gross estate with no deductions has a taxable estate of $15 million. Subtract the 2026 exemption of $13.99 million and only $1.01 million is exposed to tax. Applying the graduated brackets produces an estimated federal estate tax of $344,800, an effective rate of 2.30% on the taxable estate.
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Where the Number Comes From
The first $1,000,000 above the exemption is taxed through graduated brackets from 18% up to 37%, totaling $340,800. The remaining $10,000 falls in the top 40% bracket, adding $4,000. Total: $344,800.
Deductions Change the Answer Dramatically
Now suppose the same $15 million estate carries $200,000 in debts and $15,000 in funeral expenses. The taxable estate drops to $14,785,000, leaving only $795,000 over the exemption. The tax falls to $264,950 — a saving of about $79,850 from $215,000 of deductions, because every deductible dollar at this level saves tax at the 37-40% marginal rate.
| Scenario | Taxable Estate | Over Exemption | Estimated Tax |
|---|---|---|---|
| No deductions | $15,000,000 | $1,010,000 | $344,800 |
| $215,000 deductions | $14,785,000 | $795,000 | $264,950 |
| $1,500,000 deductions | $13,500,000 | $0 | $0 |
Why Effective Rates Stay Low
Even at the 40% top marginal rate, a $15 million estate pays just 2.3 cents per dollar because the exemption shields nearly all of it. The effective rate climbs slowly with size: roughly 11.7% at $20 million and 17.4% at $25 million. Run your own combination of debts, charitable gifts, and marital deductions above to see your estimate.
Frequently Asked Questions
Is estate tax paid by the heirs or the estate?
Federal estate tax is paid by the estate itself before assets are distributed. Heirs generally receive what remains after the tax is settled.
Does a $15 million estate owe state tax too?
Possibly. States with their own estate taxes often exempt only $1-7 million, so a $15 million estate in one of those states could owe additional state tax. This calculator covers the federal estimate only.
Can charitable giving eliminate the tax on a $15 million estate?
Yes. Qualifying charitable bequests are fully deductible, so leaving about $1.01 million or more to charity removes the entire taxable excess over the exemption.
What if most of the $15 million goes to a surviving spouse?
Assets passing to a U.S. citizen spouse qualify for the unlimited marital deduction. If the full $15 million passes to the spouse, the federal estate tax at the first death is zero.