Curated by: Rubric Advisors
Estate & Legacy
Intentionally Defective Grantor Trust (IDGT)
An Intentionally Defective Grantor Trust is an advanced estate planning strategy that removes assets from your taxable estate while the grantor continues to pay income tax on trust earnings, effectively making an additional tax-free gift each year.
Intentionally Defective Grantor Trust (IDGT)
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What Makes a Trust 'Defective'?
- The trust is a 'grantor trust' for income tax but sits outside the estate for estate tax purposes
- This split treatment is the 'defect', and it's a feature, not a bug
- The grantor pays income tax on all trust earnings, even though the assets are no longer in their estate
- Each year's income tax payment effectively transfers additional wealth to beneficiaries tax-free
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Full Guide
What Makes a Trust 'Defective'?
- The trust is a 'grantor trust' for income tax but sits outside the estate for estate tax purposes
- This split treatment is the 'defect', and it's a feature, not a bug
- The grantor pays income tax on all trust earnings, even though the assets are no longer in their estate
- Each year's income tax payment effectively transfers additional wealth to beneficiaries tax-free
The Estate Freeze Effect
- Assets transferred to an IDGT are 'frozen' at their current value for estate tax purposes
- All future appreciation occurs outside the grantor's estate, potentially saving millions in estate tax
- Common technique: sell appreciated assets to the IDGT in exchange for a promissory note at the AFR rate
- Because it's a grantor trust, the sale is not a taxable event, no capital gains tax on the transfer
Installment Sale to IDGT
- Sell assets to the IDGT for a promissory note bearing interest at the Applicable Federal Rate (AFR)
- AFR rates are typically below expected returns, the excess growth passes to beneficiaries tax-free
- The trust makes interest payments to the grantor, reducing the grantor's estate over time
- Seed the trust with a gift of 10-15% of the sale price to provide an equity cushion (strengthens the transaction)
Tax Benefits of Grantor Trust Status
- Grantor paying trust income tax reduces their estate without it being treated as an additional gift
- Trust assets grow faster because earnings aren't reduced by income tax payments
- Transactions between the grantor and the trust (sales, interest payments) are ignored for income tax purposes
- If the grantor dies while the note is outstanding, the remaining note balance may be included in the estate
When IDGTs Work Best
- Assets expected to appreciate significantly, the appreciation shifts to beneficiaries outside the estate
- When AFR rates are low relative to expected investment returns, the arbitrage is larger
- For individuals with sufficient liquidity to pay income tax on trust earnings without it being a burden
- When combined with valuation discounts on transferred assets (family LLCs, limited partnerships)
Key Takeaways
- IDGTs are one of the most powerful wealth transfer tools for high-net-worth families
- The grantor paying income tax on trust earnings is an additional tax-free gift that accelerates wealth transfer
- Installment sales to IDGTs leverage low AFR rates to shift future appreciation out of the estate
- Work with an estate planning attorney and tax advisor, IDGTs require careful structuring and ongoing compliance
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