# Estate Tax Rule Lets Spouse Inherit Unlimited Wealth Tax-Free

> Married couples can pass unlimited wealth to spouses tax-free at first death, but second death taxes may hit $6 million.
- Title: Estate Tax Rule Lets Spouse Inherit Unlimited Wealth Tax-Free
- Summary: Married couples can pass unlimited wealth to spouses tax-free at first death, but second death taxes may hit $6 million.
- Keywords: federal estate tax, marital deduction, surviving spouse, qdot, qtip trust, estate tax return, portability election, gift tax exclusion, 24/7 Wall St.
- Source: 24/7 Wall St. — https://247wallst.com/personal-finance/2026/11/07/the-estate-tax-rule-that-lets-you-leave-your-spouse-unlimited-wealth-tax-free
- Author: Jake FitzGerald
- Published: 2026-11-07T10:49:09+00:00
- Read time: 2 min
- Topics: federal estate tax, marital deduction, surviving spouse, qdot, qtip trust, estate tax return, portability election, gift tax exclusion
## Marital Deduction Basics
Federal estate tax law lets married people leave any amount to a surviving spouse with no federal tax due at first death.
## 2027 Exemption Increase
The IRS raised the basic estate tax exemption to $15,480,000 for 2027, up from $15,000,000 in 2026.
## How the Deduction Works
The marital deduction pushes estate tax to the second death by removing assets from the first estate and adding them to the second.
## 2024 Tax Data
In 2024, 7195 estate tax returns reported $248,944,039,000 in gross estates with only 2663 paying $23,313,220,000 in tax.
## Which Transfers Qualify
Property passing to the spouse qualifies for the deduction, but terminable interests and noncitizen spouses without a QDOT do not.
## QDOT Requirements
A qualified domestic trust requires a U.S. citizen trustee, tax withholding rights, and election under § 2056A(a)(3) to qualify for the deduction.
## QTIP Trusts for Blended Families
Qualified terminable interest property trusts let a spouse receive income annually while controlling who inherits the remainder.
## Worked Example: $6 Million Gap
Leaving $40 million directly to a spouse at first death avoids tax but costs $6 million in tax at second death without portability election.
## Mistakes That Waste Exclusion
Not filing on time, ignoring asset growth, or funding QDOTs too late can waste the first spouse’s tax exclusion.
## Questions to Choose Structure
Four questions decide the best structure: estate size, citizenship, children from prior marriage, and asset growth potential.
## Why Trusts Work Poorly
Trusts work poorly for couples below the exemption who want simplicity and for survivors needing full control of assets.
## Paperwork Challenges
Stale beneficiary forms, untitled accounts, and unfunded trusts are the most common pitfalls for families planning estates.
## Key takeaway

Married couples using estate tax marital deduction avoid federal tax at first death but face up to $6 million tax at second death if not structured properly.