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.

1 / 6

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

Our Approach Direct Indexing

Try Our Free Tools

Compound Growth Visualizer Inflation Calculator

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

← Browse All Topics

Need Personalized Guidance?

Talk to a Wealth Advisor

These highlights cover the essentials. For advice tailored to your specific situation, schedule a complimentary consultation with our team.

Talk to an Advisor100% Fiduciary · Fee-Only · No Commissions

The information above is for educational purposes only and does not constitute investment advice, a recommendation, or a solicitation to buy or sell any security. Any historical figures are for illustration only, and past performance does not guarantee future results. Tax laws, regulations, and contribution limits change frequently, the details here may become outdated. Individual circumstances vary. Consult a qualified financial advisor, CPA, or attorney for guidance specific to your situation. Rubric Advisors is registered with the California DFPI; registration does not imply a certain level of skill or training.

Intentionally Defective Grantor Trust (IDGT)

What Makes a Trust 'Defective'?

The Estate Freeze Effect

Installment Sale to IDGT

Tax Benefits of Grantor Trust Status

When IDGTs Work Best

Key Takeaways

What Makes a Trust 'Defective'?

The Estate Freeze Effect

Installment Sale to IDGT

Tax Benefits of Grantor Trust Status

When IDGTs Work Best

Key Takeaways

Related Topics

Spousal Lifetime Access Trust (SLAT)

Trust Tax Rate Strategy

Charitable Lead Trusts

Intentionally Defective Grantor Trust (IDGT)

What Makes a Trust 'Defective'?

The Estate Freeze Effect

Installment Sale to IDGT

Tax Benefits of Grantor Trust Status

When IDGTs Work Best

Key Takeaways

What Makes a Trust 'Defective'?

The Estate Freeze Effect

Installment Sale to IDGT

Tax Benefits of Grantor Trust Status

When IDGTs Work Best

Key Takeaways

Related Topics

Spousal Lifetime Access Trust (SLAT)

Trust Tax Rate Strategy

Charitable Lead Trusts