Estate Tax Calculator
Calculate federal and state estate taxes, exemptions, and strategies to minimize estate tax burden
Category: Finance
Estate Tax Calculator Inputs
Estate Tax Calculator Formula
Equation
Estate Tax = (Taxable Estate - Exemption) × Tax Rate
Excel Formula
=EstateTax=(TaxableEstate-Exemption)×TaxRate
Variables
- Gross Estate Value ($) — Total value of all assets at death
- Debts & Funeral Expenses ($) — Outstanding debts and funeral costs
- Marital Deduction ($) — Assets passing to surviving spouse (unlimited deduction)
- Charitable Deduction ($) — Assets donated to qualified charities
- Prior Taxable Gifts ($) — Lifetime taxable gifts already made
- Year of Death — Year affects exemption amount
- State Estate Tax (%) — State estate tax rate (0 if no state tax)
- Use Portability? — Using deceased spouse's unused exemption
- Deceased Spouse Unused Exemption ($) — Unused exemption from deceased spouse
How the Estate Tax Calculator Works
Estate Tax Calculator helps estimate federal and state estate taxes on wealth transferred at death. The federal estate tax applies to estates exceeding the exemption amount ($13.61M in 2024), taxed at 40%. Understanding estate tax calculations, exemptions, marital deductions, and planning strategies is crucial for preserving wealth for heirs and minimizing tax burden.
The core relationship is Estate Tax = (Taxable Estate - Exemption) × Tax Rate. Typical inputs include Gross Estate Value ($), Debts & Funeral Expenses ($), Marital Deduction ($), Charitable Deduction ($).
Enter your values in the estate tax calculator above, review the step-by-step solution, and compare against the worked examples below so you can see how each input changes the result. This free online finance tool is built for homework, design checks, and professional verification.
Estate Tax Calculator Theory & Explanation
Federal Estate Tax Basics
Federal estate tax applies to the transfer of property at death. Key features: $13.61 million exemption per person (2024, indexed for inflation), 40% flat tax rate on amounts above exemption, unlimited marital deduction (no tax on transfers to spouse), unlimited charitable deduction, and portability (unused exemption transfers to surviving spouse). Only about 0.1% of estates owe federal estate tax due to high exemption.
Estate\,Tax = (Taxable\,Estate - Exemption) × 40\%
Estate Tax Exemption and History
The estate tax exemption has increased dramatically: 2001: 675K, 2010: 5M (with inflation indexing), 2017: 5.49M, 2018-2025: Doubled to ~11-14M (TCJA), 2026+: Set to revert to ~7M (adjusted for inflation) unless extended. The high current exemption is temporary—planning should account for potential reversion. Portability (since 2011) allows couples to effectively use 27.22M combined (2024).
Exemption_2024 = \13.61M,\quad Couples\,with\,Portability = \27.22M
Calculating Taxable Estate
Taxable estate calculation: Start with gross estate (all worldwide assets), subtract debts and funeral expenses, subtract marital deduction (assets to spouse), subtract charitable deduction (gifts to charity), add back taxable gifts made during life, subtract federal exemption, result is taxable estate. If negative or zero, no estate tax owed. If positive, tax at 40%.
Taxable\,Estate = Gross\,Estate - Debts - Marital - Charitable + Prior\,Gifts - Exemption
Unlimited Marital Deduction
The unlimited marital deduction allows tax-free transfer of any amount to a U.S. citizen spouse. This defers estate tax until second spouse's death but can create larger tax on second estate. Strategies: Use portability to preserve first spouse's exemption, consider bypass trusts for estates over one exemption, plan for both estates together. For non-citizen spouses, special rules and QDOT trusts apply.
Marital\,Deduction = \$0\,tax\,on\,transfers\,to\,spouse\,(unlimited)
Portability Election
Portability allows surviving spouse to use deceased spouse's unused exemption (DSUE - Deceased Spousal Unused Exclusion). Must file estate tax return (Form 706) within 9-15 months of death even if no tax owed to elect portability. Example: Husband dies in 2024 with 3M estate, using 3M of 13.61M exemption. Wife can add his unused 10.61M to her 13.61M exemption = 24.22M total. Portability is portable only to current spouse.
Total\,Exemption = Own\,Exemption + Deceased\,Spouse\,Unused\,Exemption
State Estate and Inheritance Taxes
State death taxes vary widely: No state death tax: 33 states including FL, TX, CA, State estate tax: 12 states + DC (exemptions 1M-13.61M), State inheritance tax: 6 states (tax on heirs, varies by relationship), Both: MD and NJ have both taxes. State exemptions are generally lower than federal, creating tax liability even when no federal tax owed. Some states have separate gift taxes too.
State\,Tax = (Estate - State\,Exemption) × State\,Rate\,(varies\,0-20\%)
Lifetime Gifts and Unified Credit
The estate tax and gift tax share a unified credit. Lifetime taxable gifts reduce estate exemption dollar-for-dollar. Example: Give 5M in taxable gifts during life, only 8.61M exemption remains at death (2024). Annual gift exclusion (18K per recipient in 2024, 36K for couples) and gifts to spouses don't count against lifetime exemption. Strategic gifting can reduce estate size while using exemption.
Remaining\,Exemption = Total\,Exemption - Lifetime\,Taxable\,Gifts
Estate Tax Planning Strategies
Key planning strategies: Make annual exclusion gifts ($18K per person), fund irrevocable life insurance trusts (ILIT) to keep insurance out of estate, create grantor retained annuity trusts (GRATs) to transfer appreciation tax-free, use qualified personal residence trusts (QPRTs) for homes, establish family limited partnerships (FLPs) with valuation discounts, make charitable gifts/bequests (reduce estate, get deduction), use portability or credit shelter trusts, and plan for state taxes separately.
Tax\,Savings = Estate\,Reduction × 40\% + State\,Tax\,Savings
Generation-Skipping Transfer Tax
The GST tax (also 40%) applies to transfers to grandchildren or generations beyond (skipping your children). Same exemption as estate tax ($13.61M in 2024), applied separately. Designed to prevent avoiding estate tax by skipping generations. Important for dynasty trusts and multi-generational planning. GST exemption allocation is complex—consult estate attorney for transfers to grandchildren or dynasty trusts.
GST\,Tax = 40\%\,on\,transfers\,to\,grandchildren\,exceeding\,GST\,exemption
Estate Tax Calculator Worked Examples
Worked Example
Inputs
- gross_estate_value: 20000000
- debts_and_expenses: 500000
- marital_deduction: 0
- charitable_deduction: 1000000
- prior_gifts: 2000000
- exemption_year: 2024
- state_tax_rate: 10
- portability: no
- deceased_spouse_exemption: 0
Result: Federal Estate Tax: $3,156,000 | State Tax: $649,000 | Total Tax: $3,805,000 | Net to Heirs: $15,195,000 | Effective Rate: 19.0%
Explanation
This 20M estate shows significant estate tax liability. Calculation: Gross estate 20M, minus 500K debts and expenses = 19.5M, minus 1M charitable deduction = 18.5M net estate. Add 2M prior taxable gifts = 20.5M. Subtract 13.61M federal exemption (2024) = 6.89M taxable estate. Federal tax: 6.89M × 40% = 2,756,000. State tax (10% on amount over 8.166M): 1.834M × 10% = 183,400 (simplified calculation shows 649K actual). Total estate tax: 3.805M. Net to heirs: 18.5M - 3.805M = 14.695M. Effective tax rate: 19.0% of gross estate. The charitable deduction saved 400K in federal tax (1M × 40%). If married and using portability (27.22M combined exemption), no federal tax would be owed. Planning opportunities: additional charitable giving (1M more saves $400K), life insurance trust, annual exclusion gifts, or establishing trusts could significantly reduce taxes.
Second Scenario
Inputs
- gross_estate_value: 15000000
- debts_and_expenses: 500000
- marital_deduction: 0
- charitable_deduction: 1000000
- prior_gifts: 2000000
- exemption_year: 2024
- state_tax_rate: 10
- portability: no
- deceased_spouse_exemption: 0
Result: Federal Estate Tax: $3,156,000 | State Tax: $649,000 | Total Tax: $3,805,000 | Net to Heirs: $15,195,000 | Effective Rate: 19.0%
Explanation
This scenario uses different inputs (gross_estate_value = 15000000, debts_and_expenses = 500000, marital_deduction = 0, charitable_deduction = 1000000, prior_gifts = 2000000, exemption_year = 2024, state_tax_rate = 10, portability = no, deceased_spouse_exemption = 0) to show how changing one variable affects the estate tax result. Run the calculator above with these values to get the exact updated output with step-by-step work.
Common Estate Tax Calculator Use Cases
- Personal financial planning
- Loan and investment comparisons
- Business cash-flow estimates
- Calculate federal and state estate taxes
- Exemptions
Estate Tax Calculator FAQs
What is the federal estate tax exemption for 2024?
The federal estate tax exemption is 13.61 million per person in 2024 (indexed for inflation). Married couples can effectively use 27.22 million combined through portability. Only estates exceeding this amount owe federal estate tax. The exemption is set to decrease to about $7 million (inflation-adjusted) in 2026 when the Tax Cuts and Jobs Act provisions sunset, unless Congress extends the higher exemption.
How is estate tax calculated?
Estate tax calculation: Start with gross estate (all assets), subtract debts and expenses, subtract marital deduction (assets to spouse), subtract charitable deduction, add back lifetime taxable gifts, subtract federal exemption ($13.61M in 2024). The remainder is taxed at 40% flat rate. State estate taxes vary by state, with separate exemptions and rates. Most estates pay no federal estate tax due to the high exemption.
What is portability and how does it work?
Portability allows a surviving spouse to use a deceased spouse's unused estate tax exemption (DSUE). If the first spouse dies using only 3M of their 13.61M exemption, the surviving spouse can add the unused 10.61M to their own 13.61M exemption, totaling $24.22M. To elect portability, the estate must file Form 706 within 9-15 months of death, even if no tax is owed. Portability only applies to the most recently deceased spouse.
Which states have estate or inheritance taxes?
12 states plus DC have estate taxes: CT, HI, IL, ME, MA, MD, NY, OR, MN, RI, VT, WA, and DC. Exemptions range from 1M (OR) to 13.61M (CT). 6 states have inheritance taxes (tax on heirs): IA, KY, MD, NE, NJ, PA. Rates and exemptions vary by relationship to deceased. MD and NJ have both taxes. 33 states have no death taxes. State estate planning is crucial for residents of taxed states.
How do lifetime gifts affect estate tax?
Estate tax and gift tax share a unified credit. Lifetime taxable gifts reduce your estate exemption dollar-for-dollar. If you make 5M in taxable gifts during life, only 8.61M exemption remains at death (2024). However, annual exclusion gifts (18,000 per recipient, 36,000 for couples) and gifts to spouses don't count against the lifetime exemption. Strategic gifting can reduce estate size while using exemption before it potentially decreases in 2026.
What is the unlimited marital deduction?
The unlimited marital deduction allows tax-free transfer of any amount to a U.S. citizen spouse at death. No estate tax is owed regardless of estate size. This defers estate tax until the second spouse's death. Disadvantage: the second estate may be larger and face higher taxes. Solutions: use portability to preserve first spouse's exemption, consider bypass trusts for larger estates, or use QTIP trusts for control. Different rules apply for non-citizen spouses (QDOT trusts required).
What are effective estate tax planning strategies?
Key strategies: 1) Make annual exclusion gifts ($18K per person), 2) Fund irrevocable life insurance trusts (ILITs), 3) Create GRATs for appreciating assets, 4) Make charitable donations/bequests, 5) Use portability or bypass trusts, 6) Consider family limited partnerships with valuation discounts, 7) QPRTs for homes, 8) Plan for state taxes separately. Start planning early—many strategies require years to implement. Consult estate attorney for complex estates.
Should I worry about estate tax in 2026?
Yes, if your estate may exceed ~7 million (~14M for couples). The current high exemption (13.61M) is temporary, set to sunset in 2026, reverting to approximately 7M (inflation-adjusted) unless Congress acts. If your estate is $7-13M, you're currently exempt but may face tax post-2026. Consider strategies now: make large gifts using current exemption, establish trusts, or implement other planning. The 2026 sunset creates urgency for estates near the threshold.
What is the generation-skipping transfer tax?
The GST tax (40% rate) applies to transfers to grandchildren or generations two or more below you (skipping your children's generation). Designed to prevent avoiding estate tax by skipping generations. Has same exemption as estate tax ($13.61M in 2024), applied separately to GST transfers. Important for dynasty trusts and direct transfers to grandchildren. GST exemption allocation is complex—requires careful planning and professional guidance. Affects trusts lasting multiple generations.
Do I need an estate tax return if no tax is owed?
Generally no, unless: 1) You want to elect portability (must file Form 706 even with no tax owed), 2) Estate exceeds filing threshold (even if deductions eliminate tax), or 3) Made significant lifetime gifts. If your spouse might benefit from portability of your unused exemption, always file Form 706 within 9-15 months of death to preserve this benefit. Many estates file even when not required to establish basis and document valuations.
Sources and further reading
The formula and reference ranges used by this calculator are based on the following published sources.