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Estate Tax Calculator

Estimate federal and state estate taxes on total estate value with exemptions, deductions, and marital transfer planning.

Tested tool guide Tested browser tools Checked August 16, 2026

What Estate Tax Calculator does and how it behaves

Estate tax exposure depends on more than the estate's headline value. This calculator starts with total estate value, accounts for entered deductions and marital transfers, and estimates the federal and state tax attributable to the remaining taxable amounts. It is useful for comparing planning assumptions, such as transferring more property to a spouse or applying different state exemptions. The common mistake is treating the result as tax on each beneficiary. Estate tax is generally calculated for the estate, while inheritance taxes and beneficiaries' later income taxes are separate questions.

How the result is produced

1

Determine taxable amounts

The calculation reduces the entered estate value by the deductions and qualifying marital transfers supplied by the user, then accounts for the relevant exemption assumptions. These adjustments matter because tax is estimated from the amount remaining after them, not automatically from the gross estate value. If the adjustments exhaust a tax base, that layer has no positive taxable amount.

2

Estimate each tax layer

Federal and state estate tax estimates are presented separately because their exemptions and tax treatment can differ. The calculator applies the supplied assumptions to each applicable taxable amount and summarizes the resulting exposure. This separation helps show whether an estimated liability comes from the federal calculation, the state calculation, or both.

Good uses

  • Testing whether projected estate growth could create federal or state estate tax exposure.
  • Comparing estimated tax before and after a proposed qualifying transfer to a surviving spouse.
  • Preparing a rough estate liquidity estimate before discussing valuations, deductions, and filing obligations with an adviser.

Limits and checks

  • This is a planning estimate, not a completed estate tax return. Lifetime taxable gifts, valuation rules, elections, credits, and state-specific adjustments can materially change the filed result.
  • A marital transfer should not be entered merely because the recipient is a spouse. Qualification can depend on citizenship, ownership, trust terms, and the law governing the transfer.
  • Do not read the estimate as inheritance tax or beneficiary income tax. Those are separate calculations, and their applicability can depend on the jurisdiction, asset, and recipient.

Common questions

Does the estimate tell an executor exactly what the estate will owe?

No. It provides a scenario based on the amounts and assumptions entered. An executor's actual calculation can require asset valuations, adjusted taxable gifts, allowable expenses, charitable deductions, elections, credits, and jurisdiction-specific treatment. Use the result to identify possible exposure and liquidity needs, not as the amount to place on a filed return.

Does entering a marital transfer permanently eliminate tax on that property?

Not necessarily. A qualifying marital transfer can reduce tax in the first spouse's estate, but the property may later be included in the surviving spouse's estate. The result can also depend on citizenship, trust structure, available elections, and state law. The calculator shows the effect of the entered transfer assumption, not its legal eligibility.

References and verification

The behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.

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