Estate Tax $15M Exemption Calculator 2026

Calculate federal estate tax under the OBBB $15 million per-person exemption (P.L. 119-21, signed July 4, 2025). OBBB prevented the scheduled sunset to ~$7M. Enter your gross estate, deductions, and prior gifts to see your taxable estate and 40% rate tax.

Total FMV of all assets: real estate, investments, retirement accounts, business interests, life insurance owned by decedent
Debts, mortgages, funeral expenses, admin costs, marital deduction, charitable bequests
Lifetime taxable gifts above annual exclusion (from Form 709) — reduces remaining exemption
Federal Estate Tax Owed
Due within 9 months of death on IRS Form 706
Adjusted Gross Estate
Exemption Used
Taxable Estate
Tax Rate
40%
Est. Tax Without OBBB
OBBB Savings vs $7M
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Federal Estate Tax in 2026 — OBBB Raised the Exemption to $15 Million

The federal estate tax imposes a 40% rate on the taxable portion of an estate — the gross estate minus deductions and the applicable exemption. The One Big Beautiful Bill (OBBB, P.L. 119-21, signed July 4, 2025) raised the per-person estate tax exemption to $15,000,000 for 2026. Without OBBB, the TCJA's elevated exemption (~$13.99M in 2025) would have sunsetted after December 31, 2025, reverting to approximately $7 million per person — creating a massive cliff that would have brought millions of additional estates into the taxable range.

With OBBB, the $15M exemption is permanent and indexed for inflation. Married couples can effectively shelter $30M via portability — the surviving spouse claims the deceased spouse's unused exemption (DSUE) by filing Form 706 to elect portability. The estate must file Form 706 within 9 months of death (6-month extension available) even if no tax is owed, to preserve the portability election. Source: IRS Publication 559, irs.gov/form706. Last updated: May 2026.

Calculating the Taxable Estate — Key Deductions

ItemIncluded in Gross Estate?Deductible?
Real estate (FMV at death)YesNo (deduct mortgages separately)
Investment accountsYesNo
IRAs / 401(k)sYes — but pre-tax amounts subject to income tax when heirs withdrawNo
Life insurance (owned by decedent)YesNo (use ILIT to exclude)
Assets to US citizen spouseYes (gross)Yes — unlimited marital deduction
Assets to qualifying charitiesYes (gross)Yes — unlimited charitable deduction
Debts, mortgages, loansNoYes — reduces gross estate
Funeral and admin expensesNoYes

The adjusted gross estate = gross estate − debts − admin/funeral expenses. The taxable estate = adjusted gross estate − marital deduction − charitable deduction. Prior taxable gifts (from Form 709) are added back to the taxable estate when computing the tax base, but a credit is given for any gift tax previously paid. The effective tax is: (taxable estate + adjusted taxable gifts) × progressive rates − applicable exemption credit. Source: IRS Form 706 instructions, IRC §2001.

Estate Tax Planning Strategies Under the $15M Exemption

Even with the $15M per-person exemption, high-net-worth families benefit from planning: (1) Portability election — always file Form 706 to lock in the surviving spouse's DSUE, even if no tax is owed; (2) Annual gifting — $19,000 per recipient in 2026, not counting against the lifetime exemption; (3) Irrevocable trusts — GRATs, SLATs, and CLTs remove appreciation from future estates; (4) 529 superfunding — 5-year lump gift of $95,000 per beneficiary with no gift tax impact; (5) Charitable strategies — CLTs, CRTs, and Donor-Advised Funds (DAFs) reduce taxable estates while supporting causes. Note: state estate taxes have lower exemptions — Massachusetts and Oregon start at $1M. Source: IRS Form 706, IRS Publication 559, irs.gov/newsroom/estate-tax.