Understanding the Federal Estate Tax
Meet the Hartmans. Walter spent forty years building a regional plumbing-supply business, paying down the mortgage on the family home, and adding to a brokerage account he rarely touched. When he died this year, his executor sat down and added it all up: $16.2 million between the business, two properties, retirement accounts, and a life insurance policy he owned outright. The family assumed estate tax was a problem reserved for billionaires and Fortune 500 heirs. Then they actually ran the numbers, and the picture turned out to be smaller and stranger than they feared.
Here is the math they ran. In 2026, the federal lifetime exemption is $15,000,000 per person, up from $13,990,000 in 2025. Walter's estate sits $1.2 million above that line. Only the amount over the exemption is taxable, and the federal estate tax tops out at a flat 40% rate on that excess. So the estimated federal estate tax is roughly $480,000 on the $1.2 million overage, not on the full $16.2 million. That distinction is the entire ballgame, and it is the part most families get wrong the moment they hear the word "estate tax" and start to panic.
The number people fixate on is the headline rate. The number that actually drives the bill is the gap between the estate's value and the exemption. An estate worth $14.5 million in 2026 owes zero federal estate tax, because every dollar of it sits below the threshold. An estate worth $20 million owes 40% on the $5 million above the line, an estimated $2 million in tax. The exemption is not a deduction you claim on a small estate; it is a threshold, and everything below it passes to your heirs free of federal estate tax. That is why two estates can differ by a few million dollars and one owes nothing while the other writes a seven-figure check. Run your own number against the $15 million line before you assume the worst, because most estates that feel "large" still land entirely under it.
There is also a piece of recent history worth knowing. The 2026 exemption was supposed to be cut roughly in half when the 2017 Tax Cuts and Jobs Act provisions expired at the end of 2025, dropping the per-person figure back toward the $7 million range. That sunset did not happen. The law enacted in July 2025 set the exemption at $15 million as a permanent baseline, indexed for inflation starting in 2027. Families who had spent years restructuring around a feared cut got a genuine reprieve, and some of that urgent planning turned out to be unnecessary. But "permanent" in tax law really means "until Congress changes it again," so the planning logic below still matters as much as ever.