How Much Estate Tax on a $37 Million Estate (2026)?

How Much Estate Tax on a $37 Million Estate (2026)?

ByEstate Tax Guide Editorial Team

A $37 million estate can face a substantial federal tax bill, but the estate’s headline value is not always the amount the IRS taxes. The estimate depends on the deceased person’s taxable estate, prior gifts, deductions, and any unused exclusion transferred from a spouse. Here’s the basic calculation, what can change it, and why state estate taxes need a separate check.

Estimated federal estate tax on $37 million

For a straightforward estimate, assume the person dies in 2026, is a U.S. citizen or resident, has a taxable estate of $37 million, made no adjusted taxable gifts, and has no applicable deductions or credits beyond the standard exclusion. Under those assumptions, the estimated federal estate tax is $8.8 million.

The calculation uses the federal basic exclusion amount. According to the Internal Revenue Service, the exclusion for people who die in 2026 is $15 million. That amount shields the first $15 million of an individual’s estate from federal estate tax, subject to the rules for prior taxable gifts and other adjustments.

The rough calculation is:

Calculation step Amount
Assumed taxable estate $37 million
Federal basic exclusion amount $15 million
Amount above the exclusion $22 million
Estimated federal estate tax $8.8 million

This estimate reflects the top federal rate applied to the amount above the exclusion. Under 26 U.S.C. 2001(c), as published by the Office of the Law Revision Counsel, the tax on taxable amounts over $1 million is $345,800 plus 40% of the excess over $1 million. Since the assumed amount above the exclusion is well beyond that threshold, the calculation uses the 40% rate.

Put another way, the estate’s $22 million above the exclusion is multiplied by 40%, producing an estimated $8.8 million tax bill. The calculation is a useful starting point, not a final return calculation. The IRS determines the tax using the estate tax computation, applicable credits, and the relevant transfer history. See Federal Estate Tax Rate Explained (40%) and How Estate Tax Is Calculated for more on the rate and calculation method.

Why $37 million is not always the taxable amount

An estate’s headline value and its taxable estate are not necessarily the same. The gross estate can include assets that pass outside a will or probate, such as certain jointly owned property and life insurance proceeds. Some deductions may reduce the amount subject to tax, including qualifying expenses, debts, charitable transfers, and transfers eligible for the marital deduction.

The calculation also may need to account for adjusted taxable gifts made during the person’s lifetime. Prior gifts can affect the tax computation and how much exclusion remains available. So a person whose assets total $37 million could have a taxable estate below that figure, while prior taxable gifts may increase the amount used in the tax calculation.

For the scope of what may be included, see What Is the Gross Estate? and What Assets Are Included in Your Estate?. If a large share of the estate is a home or insurance proceeds, Does My House Count Toward State Estate Tax? and Does Life Insurance Count Toward Estate Tax? can help explain those assets’ possible tax treatment.

What can change the $8.8 million estimate

The estimate assumes the full $15 million exclusion is available to one person. Several details can change that assumption or reduce the amount ultimately due.

Deductions and credits

A qualifying marital deduction can allow property to pass to a surviving spouse without being included in the taxable estate in the same way as a transfer to another beneficiary. Charitable bequests and eligible estate administration expenses may also affect the computation. Whether a deduction applies depends on the asset, the recipient, and how the transfer is structured.

Credits can matter as well. A credit for tax paid on certain transfers or other allowable credits may reduce the final amount. These details are why an estimate based only on the estate’s market value should not be treated as the amount due.

Prior gifts and the annual exclusion

Some lifetime gifts may be excluded from gift tax reporting under the annual exclusion, while other taxable gifts can affect the estate tax calculation. According to the Internal Revenue Service, the federal gift tax annual exclusion is $19,000 per recipient for 2026. The exclusion is not a general cap on all gifts: gifts that do not qualify for the annual exclusion may require a gift tax return or use part of the donor’s available gift and estate tax exclusion.

The annual exclusion and the lifetime exclusion do different jobs. A gift within the annual exclusion may not use the donor’s basic exclusion, if it meets the applicable requirements. A taxable gift above the annual exclusion generally may use part of the donor’s lifetime exclusion, even if no gift tax is due at the time. That history can leave less exclusion available at death.

The gift tax return, Form 709, is due on April 15 following the calendar year in which the gift was made, according to the Internal Revenue Service. Filing a return does not necessarily mean gift tax is owed. It may be needed to report a gift and track the use of the exclusion. For context, see Gift Tax Explained: How Much Can You Gift Tax-Free? and Does Gifting Reduce Your Estate Tax?.

A deceased spouse’s unused exclusion

A surviving spouse may be able to use a deceased spouse’s unused exclusion through portability. This is not automatic: the deceased spouse’s estate generally must file a federal estate tax return and make the portability election.

According to the Department of the Treasury and the Internal Revenue Service, a qualifying executor may make a late portability election on or before the fifth annual anniversary of the deceased spouse’s date of death. The election can be relevant even when the first spouse’s estate was not large enough to owe estate tax. Eligibility and the required filing steps should be confirmed with a tax professional.

Portability can increase the exclusion available to a surviving spouse, but it does not mean every asset or tax issue is handled automatically. A return may still be required to preserve the unused exclusion, and the surviving spouse’s future transfers and gifts need to be considered. See Estate Tax Portability and DSUE Explained and How Does Portability Work for Married Couples?.

Filing requirements and payment timing

A large estate may have a federal filing obligation even when the estate’s final tax is reduced by deductions, credits, or other adjustments. For a U.S. citizen or resident who dies in 2026, the Internal Revenue Service says Form 706 is generally required when the gross estate, combined with adjusted taxable gifts and specific gift tax exemptions, exceeds the $15 million filing threshold. A return is also required when the estate elects portability, regardless of its size.

Form 706 is generally due nine months after the date of death, according to the Internal Revenue Service. The executor can request an automatic six-month extension of time to file. An extension to file is not necessarily an extension to pay, so the executor should confirm payment requirements and estimated tax with a qualified professional.

The executor usually needs to gather asset valuations, ownership records, beneficiary information, prior gift tax returns, debts, and records of expenses or charitable transfers. Complex property, a closely held business, or assets with unclear ownership can take time to value and document. Good records make it easier to support the return and to explain why the taxable estate differs from the initial $37 million estimate.

Federal filing is not the whole picture. State estate tax rules can apply separately, and a state return may be required even when no federal estate tax is due. The state’s rules may depend on the deceased person’s domicile, where real estate is located, the date of death, and the state’s own filing threshold and tax calculation. See State vs Federal Estate Tax: How They Stack and Do I Need to File a State Estate Tax Return?.

Planning considerations for a $37 million estate

At this estate size, the main task is not simply to multiply the amount above the exclusion by a tax rate. It is to coordinate the estate’s valuation, ownership, gifts, deductions, and filing decisions. An estate planning attorney and tax professional can model different outcomes and help ensure that the documents and tax filings match the person’s intentions.

Useful planning work may include:

  • Reviewing asset ownership. Confirm which assets are individually owned, jointly owned, held in trust, or payable to a named beneficiary. The way an asset passes can affect administration and tax reporting.
  • Checking beneficiary designations. Retirement accounts and insurance policies may pass directly to beneficiaries, but that does not automatically mean they are outside the gross estate for federal tax purposes.
  • Keeping gift records. Document the date, value, recipient, and purpose of gifts, and preserve filed gift tax returns. That history may be needed to calculate the estate’s remaining exclusion.
  • Considering portability. If a spouse has died, determine whether an estate tax return was filed and whether a portability election was made. Do not assume the unused exclusion transferred without the required election.
  • Reviewing charitable and marital transfers. A plan’s tax result can depend on how assets are transferred and whether the requirements for a deduction are met.
  • Checking state exposure. A state may impose its own estate tax with a lower threshold than the federal one. Real property in another state can also complicate the analysis.

The federal generation-skipping transfer tax has a separate exemption. According to the Internal Revenue Service, that exemption is $15 million per individual for calendar year 2026. It is not simply an additional estate tax exclusion that can be freely added to the basic exclusion. Transfers to grandchildren or more remote generations can raise separate GST tax issues, so the plan should address those transfers directly.

A $37 million estate may also involve liquidity concerns. Estate tax can be due even when much of the estate consists of real estate, a business, or other assets that are not immediately available as cash. Executors may need to evaluate how tax and administration costs will be funded without forcing a poorly timed sale. Any strategy involving insurance, trusts, gifts, or borrowing should be reviewed for its legal, tax, and practical consequences.

Finally, the calculation changes with the year of death. The Internal Revenue Service states that the federal basic exclusion amount was $13,990,000 for deaths in 2025, compared with $15,000,000 for deaths in 2026. The IRS has not officially announced the inflation-adjusted amount for 2027; the amount is scheduled to be adjusted annually for inflation starting in 2027. Do not use a prior-year estimate for a later death without checking the applicable exclusion and rules.

For the stated assumptions, the concise answer is about $8.8 million in federal estate tax. The actual liability could be lower or higher after the estate’s deductions, taxable gifts, credits, marital planning, portability, and state taxes are considered. An executor should treat the figure as a planning estimate and have the final calculation reviewed before filing.

Sources

Disclaimer

This article is for general informational purposes only and does not constitute professional advice. Laws and regulations vary by location and change over time. Consult a qualified professional for guidance on your specific situation.

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Estate & Inheritance Tax Desk
Our focus is on U.S. estate, gift and inheritance tax, probate and inherited assets—the federal rules and the state-by-state differences that matter when someone dies or gives property away.
To deliver clearer, more complete, and more current guides, we use AI tools throughout our research and drafting, check key figures against official sources, and correct a guide when a rule changes or a reader reports an error.
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