Grantor Trust Strategy Lets Wealthy Families Cover Heirs' Tax Bills Without Using Lifetime Exemption

Under Revenue Ruling 2004-64, payments by parents toward a grantor trust's income tax are not treated as gifts, allowing wealth to pass to heirs without reducing the lifetime estate-tax exemption. The article describes how an intentionally defective grantor trust can shift substantial value over time as the parent pays the trust's tax liability. It also notes that ordinary families may use similar concepts, such as paying Roth conversion taxes from outside funds or paying tuition providers directly.
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Revenue Ruling 2004-64 addresses a specific structure: when a trust is intentionally drafted as a grantor trust under IRC Sections 671–679, its creator remains liable for income tax. Because that liability is legally owed by the creator, paying it is not treated as a gift. Estate and gift treatment differs from income tax treatment, so trust assets can remain outside the creator’s estate while the creator covers taxes.
A worked example illustrates scale: a $5 million IDGT earning 6% generates $300,000 taxable income, producing $111,000 annual tax at 37%. Over ten years, $1.11 million is paid, potentially avoiding $444,000 in estate tax at 40%. The 2026 annual gift exclusion is $19,000 per recipient; two parents and two children could move $76,000 yearly without using exemption. Trust brackets are compressed, reaching 37% at $16,000 taxable income.
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