Calculator
Estate Tax Calculator
Estate Tax Calculator
Federal estate tax is 40% on the value above the exemption ($13,990,000 per individual in 2025, portable between spouses). The annual gift exclusion ($19,000 per recipient in 2025) lets you shrink the estate tax-free — no Form 709 required under the exclusion.
Estimated Federal Estate Tax
$804,000
Estate Planning Analysis
A $16,000,000 estate exceeds the exemption by $2,010,000, generating about $804,000 in federal estate tax at 40% — an effective 5.0% levy on the estate. A disciplined gifting plan of $50,000/year for 10 years would shrink the taxable base, and the $395,423.85 of growth transferred out with the gifts compounds the benefit. Net to heirs could improve by roughly $200,000 versus doing nothing.
*Applies a flat 40% federal rate above the exemption using the current federal exemption amount. State estate/inheritance taxes, the step-up in basis, valuation rules, and portability elections are simplified or omitted. Educational only, not tax or legal advice.
The 40% Toll Above the Exemption
The federal estate tax is the government's final claim on wealth: a flat 40% on everything transferred at death above the exemption, which stands near $14 million per individual and is portable between spouses, giving married couples roughly a $28 million shield. Fewer than one in a thousand estates ever pays it — the IRS collects from only the very largest. But for those it touches, it is punishing: an estate $3 million over the exemption surrenders $1.2 million, more than most families earn in a decade. Two forces make this a planning problem rather than a fixed fate. First, growth: a $10 million portfolio compounding at 7% doubles in about a decade, silently marching toward the exemption line. Second, the exemption itself is scheduled to sunset — under current law it is cut roughly in half after 2025, meaning estates that are safe today may be taxable tomorrow without any growth at all. That combination is why high-net-worth families gift while the exemption is high, use the annual exclusion to shrink the estate each year, and run projections like this one: the tax is avoidable, but only for those who see it coming years ahead.
Exemption, Rate, and the Gifting Wedge
The baseline calculation taxes the amount above the shield: taxable estate = estate value − exemption (doubled for married filers with portability), and tax = taxable estate × 40%, the flat marginal rate that applies above the exemption. The effective rate divides the tax by the whole estate, showing the true haircut — an estate 50% over the exemption pays an effective 13.3% on everything, not 40%. The strategy layer models lifetime gifting. Annual gifts outside the estate at death reduce the taxable base one-for-one; gifts under the annual exclusion ($19,000 per recipient in 2025) are entirely free of gift tax and reporting. Growth is where the real money lives: a dollar gifted today takes all of its future compounding with it, so the tool computes the compounding value of the gifted amounts at your assumed growth rate and adds it to the benefit. Technically, large gifts consume lifetime exemption rather than avoid it, but with an exemption near $14 million and a sunset approaching, using it while it exists is generally the right move — and this model's simplification captures the practical outcome: a smaller estate, less growth inside it, less tax at death.
Expert Insights
Use the Exemption Before It Uses You
The exemption is scheduled to be cut roughly in half after 2025 under current law — a couple whose safe shield is $28 million today may hold only about $14 million of it in a few years, with no change to their wealth. For estates between the post-sunset and current thresholds, this sunset is the single biggest planning deadline in modern estate tax. Consuming exemption now through large gifts (grants to trusts, direct gifts above the exclusion) locks in today's shield; the IRS has confirmed it will not claw it back. Waiting is not neutral — it is a bet that Congress will raise the exemption instead of letting it fall.
The Annual Exclusion Compounds Like an Investment
You can give $19,000 per recipient per year (2025) to unlimited recipients, gift-tax-free, with no reporting and no exemption consumed. A couple with three married children and six grandchildren can move $456,000 a year out of the estate — $4.56 million over a decade — plus all the growth that money would have produced inside the estate. It is the most underused legal tax transfer available, and the only requirement is starting early enough for the stream to matter.
Step-Up in Basis Makes Gifting a Trade, Not a Slam Dunk
Assets inherited at death get a step-up in cost basis — heirs can sell immediately with no capital gains tax. Assets gifted during life carry over your original, potentially minimal, basis, so heirs may pay 20% capital gains when they sell. The optimal plan compares the two taxes: gifting highly appreciated assets that heirs plan to hold or donate often beats holding for step-up; gifting cash or low-basis assets the other way. This is why estate tax planning requires both lenses — the 40% estate rate and the 23.8% capital gains rate — pointed at the same asset.
Actionable Tips
- 1
Run a Ten-Year Growth Projection Now
Project the estate at realistic growth for ten years and compare the result to the post-sunset exemption threshold. If growth alone can push you over the line, planning should start before the pressure becomes real — gifting and trust structures take time to document, and the professionals you need are busiest in the final years before a sunset. The calculator's growth slider is exactly this stress test: find the growth rate at which you cross the threshold and treat it as your planning trigger.
- 2
Map the Annual Exclusion Gift Ladder
Count every eligible recipient — children, grandchildren, in-laws — and multiply by $19,000 (spouses each get their own $19,000 per recipient). Set up automatic December transfers so the exclusion never lapses: unused annual exclusions cannot be carried forward, so every skipped year is permanently lost. Paying education and medical bills directly to the institution is an additional unlimited exclusion on top — tuition paid to the college never touches the gift tax ledger.
- 3
Get a Real Valuation of the Illiquid Pieces
Estates get surprised by the value the IRS assigns to closely held businesses, real estate holdings, and collectibles — assets that owners mentally discount but tax law values at fair market value. A professional appraisal now (not at death) shows where you actually stand relative to the exemption and identifies valuation-based discounts available within trust structures. An estate that looks safe on the owner's spreadsheet is frequently taxable on the IRS's.
Real-World Examples
The Chens Won by Planning Before the Sunset
Wen and Lisa's estate sat at $22 million — safely under a $28 million married exemption, they thought. Their planner ran the sunset math: after the exemption halved, they would face estate tax on roughly $8 million of growth that would land above the new line. They used the annual exclusion to move $400k per year into 529s and gifts for three children, and made a $4 million trust gift while the exemption was still high. When they died decades later, the taxable estate was under the threshold. The $1.6 million in tax they avoided cost them about $80,000 in legal fees — the best ratio in estate planning.
Robert's Estate Paid for Ten Years of Inaction
Robert, a single investor, died with a $17 million estate — $3 million over the exemption at the time. His family paid 40% on the overage: $1.2 million, which required selling his rental portfolio under time pressure and into a soft market. Robert had known about the annual exclusion for a decade and never used it; $19,000 a year to six recipients for fifteen years would have removed about $1.7 million plus growth from the estate. The family's accountant put it plainly at the funeral luncheon: 'The IRS just became your most expensive heir.'
Maria Grew Back Into the Taxable Zone
At 62, Maria's estate was $11 million — comfortably under the single exemption. She ran a projection at 7% growth: $21.9 million by 85, deeply over even today's exemption, and far past the post-sunset level. She started gifting the annual exclusion immediately, set up a grantor trust seeded with the most appreciated shares, and converted a portion of the portfolio into Roth IRA balances (which pass income-tax-free). Twenty years later, despite the portfolio nearly tripling, her taxable estate stayed under the line. The calculator she ran at 62 was the cheapest insurance she ever bought.
Glossary of Terms
- Federal Estate Tax Exemption
- The amount an individual can transfer at death free of federal estate tax — near $14 million currently, doubled for married couples using portability. Under current law it is scheduled to be cut roughly in half after 2025.
- Annual Gift Exclusion
- The amount you may give each recipient each year ($19,000 in 2025) with no gift tax, no reporting, and no consumption of your lifetime exemption. Unused exclusions do not carry forward.
- Portability
- The election that lets a surviving spouse inherit the deceased spouse's unused estate tax exemption, effectively doubling the shield for married couples. It must be claimed on the estate tax return of the first spouse to die.
Frequently Asked Questions
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Ivy Sinclair-Wren
Financial Chaos Analyst
Ivy Sinclair-Wren is a Financial Chaos Analyst covering investing, AI, wealth psychology, and the emotional consequences of opening finance apps during market crashes. Based in Melbourne, she specializes in demystifying the US tax code and helping users navigate the intersection of spreadsheet logic and human irrationality.