Estate Tax
Deductions That Reduce A Taxable Estate
The taxable estate is not the same as everything a person owned, because a defined set of deductions is subtracted before any calculation is made.

The value of what someone owned and the amount a tax calculation applies to are different figures. A defined set of deductions separates the two.
The gross estate comes first
Federal rules build a gross estate that includes property owned at death and certain other interests, which can be broader than what passes under a will.
From that figure, allowable deductions are subtracted to arrive at a taxable estate, and only then are credits and exclusions applied.
Because the sequence matters, an estate that looks large on an inventory can produce a very different figure after the calculation is performed properly.
Debts and expenses of administration
Obligations the deceased person owed, such as a mortgage or outstanding bills, are generally deductible, subject to conditions about whether they were genuine and enforceable.
Costs of administering the estate, including certain professional fees and expenses of selling property where required, may also be deductible under defined rules.
Whether a particular expense qualifies, and whether it is claimed against the estate or against estate income, is a technical question with more than one possible answer.
Transfers to a spouse and to charity
Property passing to a surviving spouse who is a United States citizen is generally deductible without limit, which is why many estates owe nothing at the first death.
Transfers to qualifying charitable organizations are similarly deductible, though whether an organization qualifies and how a partial interest is treated depend on specific rules.
Both deductions depend on how the transfer is structured, so a gift written imprecisely may not achieve the intended treatment.
Losses and later events
Certain losses occurring during administration may be deductible, and there are rules governing whether they are claimed on the estate tax return or elsewhere.
Elections of this kind frequently involve choosing between two returns, and the better answer depends on the estate's overall position.
These choices are generally made once and cannot be revisited, which is why they are made with a tax professional rather than after the fact.
Nothing here should be applied directly
The categories described are general. What qualifies, what documentation is required and how each interacts with credits is set by federal rules that change over time.
State-level death taxes, where they exist, follow their own rules and do not necessarily mirror the federal treatment of any deduction.
An estate tax professional prepares the calculation, and an estate attorney addresses how the underlying transfers were structured.
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