Sale to an IDGT
Exchanging an appreciating asset for a fixed-value note and shifting future growth.
Some of the most powerful wealth-transfer strategies do not begin with a gift. They begin with a sale. A business interest worth $15 million today could be worth $40 million in ten years. An outright gift moves both, but may consume substantial exemption.
In a sale to an Intentionally Defective Grantor Trust, the wealth creator sells an appreciating asset to an irrevocable grantor trust for a promissory note. The grantor receives a fixed economic claim; the trust receives the asset. If the asset grows faster than the note’s financing cost, the excess can accumulate for the beneficiaries rather than in the seller’s estate.
The IDGT is the platform. The sale is the transaction.
An IDGT can be treated as owned by the grantor for federal income-tax purposes while being structured so its assets are not necessarily included in the grantor’s gross estate. That distinction creates the platform.
The estate holds an appreciating asset
A business, real estate or investment interest whose growth would build inside the estate.
The estate holds a fixed-value note
The appreciation potential has moved to the trust.
Can we replace an appreciating asset inside the estate with a fixed-value note, and let future growth accumulate for the next generation?
The note does not grow with the business
A founder sells a $10 million business interest to an IDGT for a $10 million note, with a supportable valuation and proper structure. Ten years later, the interest is worth $30 million. The note is not worth $30 million because the business appreciated; the seller is still owed principal and interest.
The objective is not to remove today’s value. It is to stop tomorrow’s appreciation from accumulating in the seller’s estate.
An exchange, not a $10 million gift
$10 million asset out, nothing in
Can be a $10 million gift, before valuation and other rules, that may consume substantial lifetime exemption.
$10 million asset out, $10 million note in
Designed as an exchange for adequate consideration rather than a gift.
If the asset is actually worth $14 million and is “sold” for $10 million, the $4 million difference may create a gift-tax problem. A sale to an IDGT begins with credible valuation.
The promissory note is the engine of the freeze
The note is not incidental paperwork; it is one of the central assets in the transaction. It should address:
The note must fit the transaction’s economics. A $20 million sale cannot simply be documented with a note the trust has no reasonable ability to service.
The financing hurdle
The IRS publishes AFRs monthly, and the appropriate short-, mid- or long-term rate depends on the note’s term and structure. For October 2026 the annual rates are 4.25%, 4.61% and 5.22%.
| Asset transferred | $10,000,000 | |
| Promissory note | $10,000,000 | |
| Illustrative note rate | 5% | |
| Hypothetical long-term asset return | 10% |
This does not mean the trust automatically transfers 5% a year to the beneficiaries; real cash flow, valuation, taxes, distributions and performance are more complicated. But the strategy aims to capture the spread between the asset’s growth and the cost of financing the purchase. The larger and more sustained the spread, the more successful the freeze may be.
The trust needs economic substance
A trust consisting only of a note payable to the seller may raise significant concerns. Sale-to-IDGT planning therefore often funds the trust with capital before the sale.
Grantor makes an initial gift to the IDGT
The trust now owns independent assets
The trust buys more property with a promissory note
There is no universal capitalization percentage to copy into every transaction. Trust assets, guarantees, cash flow, note terms and business economics must be evaluated by counsel and tax advisers.
Exemption as capital for a larger freeze
Capitalizes the IDGT
Consumes some exemption.
Larger business interest for a note
Shifts appreciation without treating the full price as a gift.
To move a $20 million business interest without a $20 million gift, lifetime exemption can serve as capital supporting a much larger estate-freeze transaction. That is one reason IDGT sales are often discussed for substantial estates.
Why grantor-trust status matters
The planning premise is that the grantor and the grantor trust are treated as the same taxpayer for relevant federal income-tax purposes. That makes the sale very different from selling the same asset to a child or unrelated trust. Grantor-trust status must be deliberately created and properly maintained.
The income-tax burn
Pays the income tax
Personal assets decline as taxes are paid.
Retains more capital
Keeps compounding for the beneficiaries.
In Rev. Rul. 2004-64, the IRS concluded that a grantor’s payment of income tax on grantor-trust income is not itself an additional gift to the beneficiaries. The grantor might pay hundreds of thousands, or potentially millions, of dollars of tax on trust income over time, accelerating the transfer without an equivalent annual taxable gift.
For the right family, extremely powerful. For the wrong family, a serious cash-flow burden.
But tax reimbursement requires care
A right to be repaid
Can cause estate-inclusion concerns under §2036.
Trustee discretion
Standing alone, absent other problematic facts, does not automatically produce the same result.
A provision designed to solve an income-tax problem can create an estate-tax problem.
Where will the trust get the money to pay the note?
- Business distributions
- Partnership distributions
- Rental income
- Portfolio income
- Asset sales
- Refinancing
- Other trust capital
The cash-flow model should be prepared before the transaction, not after. If the trust owns an illiquid business that distributes almost no cash, servicing a large note may become difficult. This is why asset selection matters.
Principal returns throughout the term
Steady payments of interest and principal to the seller.
Principal deferred to maturity
Lower payments now, with a balloon at the end.
Each produces different:
- Cash-flow requirements
- Estate exposure
- Investment opportunity
- Refinancing risk
- Balloon-payment risk
The structure should reflect the asset’s economics, not simply maximize theoretical transfer-tax efficiency.
A 30% interest is not necessarily 30% of the company
If a founder sells 30% of a private company to an IDGT, its value may differ from 30% of the headline enterprise value. The analysis may consider:
- Voting rights
- Control
- Transfer restrictions
- Marketability
- Entity agreements
- Debt
- Cash flow
- Industry conditions
- Comparable transactions
- Expected growth
Valuation adjustments should rest on actual economics and defensible appraisal principles, not on a lower number because the strategy benefits from it. The larger the transaction, the more important professional valuation becomes.
Instead of transferring each underlying asset, the grantor may sell an interest in the entity. The LLC keeps holding the investments or real estate, preserving centralized management while transferring economic ownership.
The LLC should have a legitimate business or investment purpose and actually operate under its governing documents.
Succession, liquidity events and real estate
A founder with a $30 million company wants the next generation to participate economically without giving up management control. The company may recapitalize into voting and nonvoting interests.
Voting interests
Control.
Nonvoting interests
Economic ownership.
Equal ownership and equal control do not have to be the same thing.
Begin while uncertainty remains
- Business sale
- Recapitalization
- Major financing
- IPO
- Development approval
- New business contract
- Rapid expansion
Once a transaction is effectively fixed or the right to income has matured, transferring the value afterward can create serious tax problems. Pre-transaction planning requires time.
A $20 million real-estate LLC
Selected interests in a cash-flowing, appreciating portfolio might be sold to an IDGT, preserving centralized management while shifting growth.
- Debt
- Lender consent
- Transfer restrictions
- Property-tax reassessment
- Transfer taxes
- Partnership tax
- Depreciation
- State income tax
- Entity agreements
- Cash distributions
A federal estate freeze can produce a poor overall result if state or property-level consequences are ignored. California and New York real estate need particularly careful state-specific analysis.
Estate-tax reduction vs. capital-gains basis
Assets shifted outside the gross estate generally do not receive a §1014 basis adjustment merely because the grantor dies. Low-basis assets need particularly careful analysis.
From static transfer vehicle to basis-management structure
Low-basis stock
- Value
- $10,000,000
- Basis
- Low
Moves back to the grantor, where estate inclusion may bring a basis adjustment at death.
Cash or high-basis assets
- Value
- $10,000,000
- Basis
- High
Moves into the trust as replacement property.
Subject to the trust instrument, fiduciary considerations, valuation and tax rules. The IRS has emphasized equivalent value and fiduciary safeguards for substitution powers in grantor trusts.
The sale against the alternatives
Annuity-based freeze
- Asset to the GRAT; annuity to the grantor
- Successful excess appreciation to beneficiaries
- Very low gift-tax cost when structured appropriately
- Grantor’s survival of the term is important
Note-based freeze
- Asset to the IDGT; note to the grantor
- Growth above financing cost stays in trust
- Can operate over a longer horizon
- Different cash-flow and planning flexibility
A sophisticated family may use both.
Exchange value, or give it
An outright gift may consume exemption on the full value and moves future appreciation immediately, but the donor receives nothing. In a sale, the seller receives a note of equivalent value and keeps an economic asset while seeking to transfer growth above the financing cost.
The comparisonGift = current value + future growth; sale = exchange current value, transfer future growth
They can work together
A SLAT might be the long-term trust for a spouse and descendants, with a grantor-trust sale later built into the broader plan. But trusts are not interchangeable: beneficiaries, retained powers, reciprocal-trust concerns, grantor-trust status, capitalization and inclusion rules all matter.
CautionDo not treat every trust as interchangeable
Appreciation inside a multigenerational structure
- Founder sells appreciating interest
- Long-term grantor trust
- Children
- Grandchildren
- Later generations
The transaction then does more than move appreciation out of one estate; it places it inside a governance structure built to preserve wealth across generations. If GST planning is intended, exemption allocation and the trust’s transfer-tax status need separate analysis.
When the note is paid off, or the seller dies first
The freeze worked if the trust kept more
The grantor now holds the cash or assets received as principal and interest, again part of the grantor’s wealth. The freeze worked to the extent that value returned to the grantor is less than value accumulated in the trust.
The note proceeds still need a plan:
- Spent
- Invested
- Used for taxes
- Used for philanthropy
- Transferred through other strategies
The note becomes an estate asset
The note does not disappear. It is generally an asset of the grantor’s estate, which may keep collecting payments under its terms.
Unlike a GRAT, the sale does not rely on surviving a fixed annuity term in the same way. But death can raise other income-tax, estate-tax, valuation and note-administration issues that should be modeled before implementation.
How sale planning changes with scale
$10 million net worth
Perhaps not neededA business owner’s $4 million company is expected to grow rapidly. At current exemption levels, an installment sale may not be necessary for federal estate-tax reasons alone. The family might benefit more from:
- Basis preservation
- Liquidity
- Retirement planning
- Business succession
The technique should not be used simply because the business is appreciating.
$25 million family
When a sale stands out- Business
- Real estate
- Investments
- Other assets
Outright gift
SLAT
GRAT
Sale to IDGT
With the business expected to double, a sale may stand out if the trust can support the note, the family wants to preserve exemption, and expected appreciation materially exceeds the financing cost.
$50 million founder
Keep control, move growth- Business
- Real estate
- Investments
- Other assets
- The company recapitalizes
- The founder keeps the voting interests
- Selected nonvoting interests are sold to an appropriately funded IDGT
- The trust services the note from business distributions
- Future appreciation accumulates inside the trust
Alongside a SLAT, GRAT, ILIT, dynasty trust and family LLC, the sale occupies a defined place in the broader architecture.
$100 million family
Different assets, different solutionsNo single strategy should control the entire estate.
When a sale to an IDGT may not be appropriate
- The asset has limited appreciation potential
- Expected return does not materially exceed the financing cost
- Valuation is uncertain or aggressive
- Trust capitalization is inadequate
- The asset cannot generate enough cash to service the note
- The grantor cannot comfortably bear the income-tax burden
- Basis considerations favor retaining the asset
- State taxes undermine the economics
- The family does not need sophisticated transfer planning
A complicated transaction is not inherently a good transaction. The expected benefit should justify the complexity.
Can we sell this asset to a grantor trust?
Does this transaction meaningfully improve the family’s after-tax position?
After considering valuation, financing, income tax, basis, liquidity and succession, the family should ask:
- What is the asset worth?
- How reliable is the appraisal?
- How much appreciation is realistically expected?
- What AFR applies to the note?
- Can the trust service the debt?
- How much seed capital is appropriate?
- What happens if the business underperforms?
- Can the grantor afford the income-tax burn?
- Should tax reimbursement ever be available?
- What happens if the seller dies before maturity?
- Should the note amortize or use a balloon payment?
- What are the basis consequences?
- Could a substitution power help manage basis later?
- Would a GRAT produce a better result?
- Should the trust ultimately function as a dynasty trust?
Are we freezing genuine economic value, or merely creating an elaborate intrafamily IOU?
A sale to an IDGT is evaluated as a coordinated tax, valuation, financing, business-succession and family-governance transaction:
Estate Tax + Gift Tax + GST Tax + Income Tax + Basis + AFR + Valuation + Cash Flow + Business Succession + Real Estate + Liquidity + Family Governance
The trust document is only one component; the strategy succeeds or fails on the economics around it. The objective is to determine whether exchanging an appreciating asset for a fixed economic claim creates a better long-term result for the family.
This requires coordinating estate counsel, tax counsel and CPAs, qualified valuation professionals, business counsel, investment professionals, trustees, insurance advisers and other specialists as appropriate.
Intrafamily Loans
The sale to an IDGT uses debt as part of an estate freeze. The next strategy isolates the debt concept itself.
Can a family move capital to the next generation at a prescribed financing cost while the borrower keeps the investment return above that cost?
- Applicable Federal Rates
- IRC §7872
- Demand vs. term loans
- Short-, mid- and long-term AFRs
- Loans to children
- Loans to trusts
- Real-estate purchases
- Business capitalization
- Refinancing family debt
- Interest-only vs. amortizing loans
- Forgiveness and gift-tax consequences
- Documentation and collateral
- Imputed interest
- Investment arbitrage
- Loan vs. outright gift
- Loan vs. IDGT sale
Book a Confidential Consultation
Discuss whether a sale to an IDGT fits your family’s estate, business, real estate, insurance and multigenerational wealth strategy with ARH Global Advisors.