Federal Estate Tax Calculator

The federal estate tax uses a progressive rate structure ranging from 18% on the first $10,000 of taxable estate up to 40% on amounts exceeding $1 million. However, because of the unified credit, the effective starting rate for estates that actually owe tax is always 40%.

Here is how the calculation works step by step:

• Step 1 — Gross estate: Add up the fair market value of all assets, including real estate, investments, retirement accounts, life insurance proceeds, business interests, and personal property.
• Step 2 — Deductions: Subtract debts, mortgages, funeral/administrative expenses, charitable bequests, and the marital deduction (if applicable).
• Step 3 — Tentative tax: Apply the progressive brackets to the full taxable estate amount.
• Step 4 — Unified credit: Subtract the unified credit (the tentative tax on the exemption amount). For 2025, this credit is approximately $5.389 million, which effectively zeroes out tax on the first $13.61M.
• Step 5 — Net tax: The result is the estate tax owed. If the credit exceeds the tentative tax, no tax is due.

Because the unified credit cancels out the lower brackets, any estate that actually owes tax is paying at the marginal rate of 40% on every dollar above the exemption. The progressive brackets matter for computing the credit itself but not for the incremental tax on large estates.

The Tax Cuts and Jobs Act (TCJA) of 2017 roughly doubled the estate tax exemption from about $5.49 million to $11.18 million per person (indexed for inflation). This provision is set to expire after December 31, 2025, unless Congress acts to extend or modify it.

What happens if the TCJA sunsets:

• Exemption drops to roughly $7 million: The per-person exemption would revert to the pre-TCJA baseline, adjusted for inflation. Most estimates put this around $6.8M to $7M.
• Millions more estates become taxable: An estate worth $10 million owes nothing today but could face approximately $1.2 million in tax under the sunset scenario.
• Married couples lose significant capacity: The combined exemption drops from ~$27.22M to ~$14M, a loss of over $13 million in tax-free transfer capacity.
• No clawback on prior gifts: The IRS has confirmed that gifts made while the higher exemption is in effect will not be retroactively taxed if the exemption later decreases.

This sunset creates an urgent planning window. Many estate planners recommend making large gifts before the end of 2025 to lock in the higher exemption. Strategies include irrevocable trusts, spousal lifetime access trusts (SLATs), and grantor retained annuity trusts (GRATs).

However, there is significant political uncertainty. Congress could extend the current exemption, let it sunset, or set a completely different threshold. Planning should be flexible enough to handle multiple outcomes.

The unlimited marital deduction allows you to transfer any amount of assets to a surviving spouse who is a U.S. citizen without incurring federal estate tax. This is one of the most powerful estate planning tools available, but it comes with important caveats.

How it works:

• Unlimited amount: There is no cap. You could leave a $500 million estate entirely to your spouse with zero estate tax.
• Only defers the tax: The marital deduction does not eliminate estate tax — it defers it until the surviving spouse dies. At that point, the combined assets are taxed in the survivor's estate.
• U.S. citizenship required: Non-citizen spouses do not qualify for the unlimited marital deduction. Instead, they may use a Qualified Domestic Trust (QDOT) which has additional restrictions.
• Portability election: The deceased spouse's unused exemption (DSUE) can be transferred to the surviving spouse by filing Form 706, even if no tax is owed. This effectively doubles the exemption for the survivor's estate.

A common planning strategy is to not leave everything to the surviving spouse. Instead, estate planners often recommend funding a bypass trust (also called a credit shelter trust) with up to the exemption amount, and leaving the remainder to the spouse. This ensures both spouses' exemptions are fully utilized, potentially sheltering over $27 million from tax.

Several deductions can significantly reduce the size of a taxable estate. Understanding and maximizing these deductions is a core part of estate tax planning.

Major estate tax deductions:

• Debts and liabilities: All outstanding debts at the time of death — mortgages, car loans, credit card balances, business debts, and income taxes owed — are deductible from the gross estate.
• Funeral and administration expenses: Costs of the funeral, burial or cremation, executor fees, attorney fees, accounting fees, appraisal costs, and court costs for probate are all deductible.
• Charitable bequests: Any amount left to a qualifying charity or nonprofit organization is fully deductible. There is no cap on the charitable deduction for estate tax purposes, unlike the income tax charitable deduction.
• Marital deduction: Transfers to a surviving U.S. citizen spouse are fully deductible (unlimited). This is the single largest deduction available.
• State estate taxes paid: Federal estate tax law allows a deduction for state death taxes paid, which can provide some relief in states with their own estate tax.
• Losses during estate administration: Casualty or theft losses that occur during estate settlement may be deductible if not covered by insurance.

Strategic use of these deductions, combined with lifetime gifting, trusts, and other planning techniques, can dramatically reduce or even eliminate estate tax for many families. Professional guidance from an estate planning attorney and CPA is strongly recommended.

The federal estate tax and the gift tax are part of a unified transfer tax system. They share a single lifetime exemption, which means gifts you make during your lifetime reduce the exemption available for your estate at death.

Key concepts:

• Annual gift exclusion (2025): You can give up to $19,000 per recipient per year without using any of your lifetime exemption. Married couples can give $38,000 per recipient by splitting gifts.
• Lifetime exemption: The same $13.61M exemption covers both lifetime gifts and transfers at death. If you give $5M in taxable gifts during your life, only $8.61M of exemption remains for your estate.
• Gift tax rates: The gift tax uses the same progressive bracket structure as the estate tax (18% to 40%). The unified credit offsets both.
• Generation-skipping transfer (GST) tax: A separate 40% flat tax applies to transfers that skip a generation (e.g., grandparent to grandchild). It has its own $13.61M exemption in 2025.

This unified system means estate planning must consider the full picture of lifetime and testamentary transfers. Gifting assets that are expected to appreciate significantly — such as equity interests in growing companies — during your lifetime can be a powerful strategy because the future appreciation occurs outside your estate.

The no-clawback rule under the TCJA is especially relevant here: gifts made under the current higher exemption will not be penalized if the exemption later decreases. This creates a strong incentive to make gifts before any potential sunset.

While this calculator provides a straightforward tax estimate, real-world estate planning involves a toolkit of strategies that can dramatically reduce or even eliminate the tax bill. Here are the most common approaches.

Core strategies:

• Lifetime gifting: Transfer appreciating assets now to remove future growth from your estate. Annual exclusion gifts ($19,000/person in 2025) require no reporting and do not use your exemption.
• Irrevocable life insurance trust (ILIT): Life insurance proceeds are included in your estate if you own the policy. Transferring ownership to an ILIT removes the proceeds from your taxable estate.
• Spousal lifetime access trust (SLAT): An irrevocable trust that lets you gift assets out of your estate while your spouse retains access as a beneficiary. Popular for locking in the current high exemption before a potential sunset.
• Grantor retained annuity trust (GRAT): You transfer assets to a trust and retain an annuity payment for a term of years. If the assets grow faster than the IRS hurdle rate (Section 7520 rate), the excess passes to beneficiaries gift-tax-free.
• Charitable remainder trust (CRT): Provides you with an income stream for life or a term of years, with the remainder going to charity. Generates an immediate charitable deduction and removes assets from the estate.
• Family limited partnership (FLP): Transfer business or investment assets into an FLP, then gift limited partnership interests at a valuation discount (lack of marketability and minority interest discounts).

Each strategy has trade-offs, complexity, and specific legal requirements. The best estate plans typically combine multiple techniques tailored to the family's unique financial situation, goals, and risk tolerance. Always work with qualified legal and tax professionals.