Intentionally Defective Grantor Trust (IDGT): How a ‘Defective’ Trust Transfers Wealth Efficiently
Why ‘Defective’ on Purpose
Two tax systems treat grantor trusts differently:
Income tax (Subchapter J): under §671-679, certain trust powers make the trust ‘grantor trust’ for income tax purposes. Grantor reports trust income on personal return; trust isn’t separate taxpayer for income.
Estate tax (§§2031-2046): different rules govern whether trust assets are in grantor’s estate. Grantor trust status for income tax does not automatically make the trust includible in grantor’s estate.
The ‘defective’ design exploits this gap:
– Trust includes income tax grantor trust triggers (under §675 or others) — ‘defective’ for income tax (treated as grantor’s) – Trust excludes estate tax inclusion provisions (no §2036, 2038 retained powers) — effective for estate tax (excluded from estate)
Result:
– Grantor pays income tax on trust earnings from outside the trust (‘tax burn’ benefit) – Trust assets compound tax-free for beneficiaries – At grantor’s death, trust assets are not in grantor’s estate (no estate tax)
For Intentionally Defective Grantor Trust Idgt, this combination is impossible without intentional structure. Standard estate tax planning would avoid grantor trust status to make trust its own taxpayer. IDGT deliberately retains grantor trust status while securing estate exclusion.
Common grantor trust triggers in IDGT:
1. Power to substitute property (§675(4)). Grantor can swap assets of equivalent value with trust. Most common.
2. Power to vote stock (§675(3)). Grantor retains voting rights on closely-held stock.
3. Spousal beneficiary (§677). Trust income payable to grantor’s spouse.
4. Foreign trust provisions (§679). For foreign-situs trusts.
5. Borrowing without security (§675(2)). Grantor can borrow from trust without adequate security.
Most IDGTs use the substitution power (§675(4)) as the trigger. It’s: – Clear grantor trust trigger – Doesn’t include trust assets in estate (under §2036 or §2038) – Permits grantor to swap out depreciated assets for cash later if needed – Court-tested and IRS-accepted
Sale to IDGT — The Core Mechanic
The standard IDGT strategy is ‘sale to IDGT for installment note’:
1. Grantor establishes IDGT with initial ‘seed’ gift (typically 10% of intended transfer value).
2. Grantor sells additional appreciating assets to IDGT in exchange for installment note.
3. IDGT pays grantor periodic interest payments (at AFR rate).
4. Trust assets generate returns; trust pays interest from returns.
5. At note maturity (or earlier), trust pays remaining principal.
6. Excess returns over AFR remain in trust for beneficiaries.
Example:
Grantor establishes IDGT with $1M seed gift (using gift tax exemption).
Grantor sells $9M of appreciating stock to IDGT for $9M installment note. Note pays AFR interest (say, 4.5% annually for long-term AFR) over 10 years.
Annual interest from trust to grantor: $9M × 4.5% = $405,000.
Trust assets ($9M) earn returns. If returns are 10% annually:
– Year 1: trust assets grow to $9.9M – Pay grantor $405K interest – Net trust value end of year: $9.495M Over 10 years, with continued 10% growth and 4.5% interest payments to grantor: trust accumulates substantial value above the note balance. At note maturity: trust pays grantor $9M principal. Trust retains excess (the 10% growth minus 4.5% interest, compounded over 10 years). Result: substantial wealth transferred to beneficiaries via the trust’s retained excess return.
Math:
If trust grows at 10% and AFR is 4.5%: 5.5% spread compounded over 10 years on $9M = $4.5M+ of transferred wealth.
Tax cost to grantor: $1M of gift tax exemption used (the seed gift). Zero gift tax on the sale (it’s a sale, not a gift, as long as note is at AFR and substance is respected).
Compare to direct gift: gifting $10M would use $10M of exemption. Sale to IDGT uses only $1M of exemption and transfers similar total wealth (if assets appreciate as expected).
Tax burn benefit:
Trust earnings: $9M × 10% = $900K/year (taxable income).
Grantor pays income tax on $900K (trust is grantor trust): $360K of federal tax (40% combined).
Trust keeps the $900K to compound (no income tax leakage at trust level).
Grantor’s $360K of tax payments come from grantor’s personal funds — effectively another gift to beneficiaries (without using exemption).
Over 10 years: grantor pays $3.6M of tax burn, all of which compounds tax-free in trust for beneficiaries.
Intentionally Defective Grantor Trust Idgt: Seeding the IDGT
The ‘seed’ gift is critical. The IRS has indicated (though not formally ruled) that trusts should have substantive equity before receiving a sale-to-trust transaction. Common practice: seed the trust with 10% of the intended sale value.
Why seeding matters:
Without sufficient seeding, the IRS may treat the ‘sale’ as a gift. The note isn’t backed by adequate trust equity; it’s just a paper note. Substance over form analysis could collapse the transaction.
10% rule: industry standard but not codified. Some practitioners use higher seeding (15-20%) for additional safety.
Seed gift mechanics:
1. Grantor transfers cash or marketable securities to trust via gift.
2. Gift uses grantor’s lifetime gift tax exemption.
3. Trust now has equity for sale-to-trust transaction.
Example seeding for $9M sale:
– 10% seeding: $900K initial gift (using ~$900K of exemption) – Trust now has $900K equity – Sale: $9M of assets in exchange for $9M note – Trust equity post-sale: $900K (seed) – Trust note obligation: $9M – Trust net value: $0 (immediately after sale), but with appreciating assets
Some practitioners use larger seed (15-25%) for additional cushion against IRS challenge. Trade-off: more exemption used.
For very large transactions ($50M+ sales): seeding may be reduced percentage but still substantial absolute dollars.
Independent valuation:
Critical to support the sale price. Get qualified appraisal of assets being sold to trust. Document valuation methodology.
Lowball valuation: IRS may argue the ‘sale’ was partly a gift (excess value gifted). Use of additional exemption + possible gift tax.
High valuation: produces higher note balance; more interest paid to grantor; less in trust. Not ideal for wealth transfer.
Conservative, defensible valuation: aim for fair market value with reasonable discounts where supportable.
Note Terms and AFR
The installment note must be a real, enforceable debt obligation:
Interest rate: at least the Applicable Federal Rate (AFR) for the note term.
AFR rates (published monthly by IRS):
– Short-term (≤3 years): ~5% (2025 range) – Mid-term (3-9 years): ~5% – Long-term (>9 years): ~5%
Note term: typically 9-12 years. Longer terms expose to risk; shorter terms require faster paydown.
Interest payment frequency: typically annual. Some notes pay quarterly.
Principal: typically balloon payment at maturity. Some notes amortize.
Security: the note may or may not be secured by the trust’s assets. Unsecured notes are more common for IDGTs (preserves trust flexibility).
Why AFR matters:
Below AFR: would be a gift (under §7872 imputed interest rules). The ‘gift’ element would consume gift exemption.
At AFR: full sale treatment; no gift element.
Higher than AFR: legitimate sale terms but reduces appreciation transfer to trust.
AFR rate at funding locks the rate for the note’s term. If AFR rises later, note still uses locked-in lower rate.
For 2025-2026 with AFR around 5%: note must beat 5% growth to transfer wealth. Lower-growth assets are problematic.
Best for high-growth assets where actual returns expected to significantly exceed AFR.
Note termination:
1. Maturity payment: trust pays principal at maturity from trust assets. Trust retains the appreciation above AFR.
2. Substitution: grantor can swap note for other property (using power of substitution).
3. Refinance: at maturity, trust may refinance the note (new term, new AFR).
4. Forgiveness: if grantor forgives the note, the unpaid balance becomes a gift to trust (uses additional exemption or gift tax). Rarely advisable.
Income Tax Treatment
IDGT is grantor trust for income tax purposes. Treatment:
1. Trust transactions ignored for income tax during grantor’s lifetime.
Grantor and trust treated as one taxpayer.
Sale of asset from grantor to trust: Not a taxable event (sale to oneself).
Interest paid by trust to grantor on note: Not taxable income to grantor (paying yourself).
Trust earnings: reported on grantor’s personal tax return.
Capital gains in trust: reported on grantor’s return.
2. Grantor pays all trust income tax from personal funds.
Tax burn: tax payments reduce grantor’s estate by the tax amount each year. Additional wealth shifted to trust beneficiaries (without using exemption).
Tax payments aren’t reimbursable from trust without losing grantor trust status. Grantor accepts the tax cost.
3. At grantor’s death: grantor trust status terminates. Trust becomes its own taxpayer.
Trust begins reporting income at compressed trust brackets (37% federal at ~$15K).
Beneficiaries may take Distributable Net Income (DNI) at their individual rates.
Step-up basis: assets in IDGT do not receive step-up at grantor’s death (since not in estate). Beneficiaries take carryover basis.
Strategic basis: for assets to be held long-term in trust, lost step-up is offset by estate tax savings. For assets sold soon after grantor’s death, lost step-up is a real cost.
Tax burn payments through the years:
Example $9M IDGT earning 10% annually for 10 years:
Year 1 trust income: $900K. Grantor tax (40% combined): $360K. Trust keeps $900K. Year 2 trust income: $900K × 1.10 = $990K. Grantor tax: $396K. Trust keeps $990K…. Over 10 years: grantor pays approximately $5M of tax. Trust gains $5M of additional growth (because tax paid externally).
$5M of additional wealth transferred via tax burn, in addition to direct sale-to-IDGT benefits. No gift exemption used for these payments.
Estate Tax Treatment
Critical: IDGT must be effective for estate tax exclusion despite grantor trust income tax status.
Powers to AVOID (would cause estate inclusion):
§2036(a)(1): retained life estate. Grantor retaining right to use trust property or income for life.
§2036(a)(2): retained control over enjoyment. Grantor retaining power to designate who enjoys trust property.
§2038: revocable transfer. Grantor retaining power to amend, alter, revoke.
§2042: incidents of ownership on life insurance.
§2041: general power of appointment (if grantor has).
Powers OK (don’t cause estate inclusion):
§675(4) substitution power: grantor can swap equivalent value property. Does not cause estate inclusion (Rev. Rul. 2008-22 confirmed).
§675(2) borrowing without security: grantor can borrow from trust. Does not cause estate inclusion.
§677 spousal interest: trust income to spouse. Does cause grantor trust status for income tax, but the spouse interest typically doesn’t cause estate inclusion in grantor.
Independent trustee provisions: trustee independent of grantor; doesn’t cause estate inclusion.
Distribution discretion: trustee has discretion over distributions. Grantor doesn’t (would cause §2036 inclusion).
If properly structured: assets in IDGT outside grantor’s estate. Note becomes grantor’s asset; replaces the sold asset in estate.
Note value at grantor’s death:
Outstanding note balance is in grantor’s gross estate.
If note has been substantially paid down: small amount in estate.
If note has been fully paid (rare for installment notes): zero estate inclusion.
Strategic: longer notes accumulate more time for trust appreciation while grantor retains note interest payments.
Mortality risk: if grantor dies during note term, the unpaid principal is in estate. Estate tax planning partially defeated for the note portion.
Mitigation: shorter note terms; insurance on grantor’s life; secondary planning.
Best Assets for IDGT
IDGT works best with assets expected to substantially outperform AFR.
Ideal:
1. Closely-held business interests: typically grow at rates well above AFR. Often available with valuation discounts.
2. Pre-IPO equity: potential huge appreciation if IPO occurs.
3. Real estate in appreciating markets: capital appreciation plus cash flow.
4. Concentrated stock positions: company-specific growth potential.
5. Family limited partnership interests: combine valuation discounts with growth potential.
Less ideal:
– Cash or money market (essentially zero appreciation, all interest goes to grantor) – Government bonds (typically below AFR) – Mature investments with modest growth – Depreciating assets
Valuation discount opportunity:
Closely-held business sold to IDGT can benefit from valuation discounts:
– Minority interest: 25-35% discount – Lack of marketability: 15-30% discount – Combined: 30-45% discount
Effect: $10M of underlying business value might be sold to IDGT for $6M-$7M of note (using discounted value).
Note: $6M-$7M (smaller than underlying $10M). Trust receives: $10M of underlying value. Difference: $3M-$4M effectively transferred via discount alone.
If business grows at 10% annually: $10M of underlying assets grow to $25M+ over 10 years. Trust retains substantial appreciation.
Aggressive discount strategy: don’t overreach. IRS scrutinizes excessive discounts. Documented, defensible valuations are essential.
Combination with FLP: assets held in family limited partnership; FLP interests sold to IDGT. Combines FLP discounts with IDGT mechanics.
Comparing IDGT to Other Vehicles
IDGT vs. SLAT:
– SLAT: gift of assets to spouse-beneficiary trust. Uses exemption upfront. – IDGT: sale of assets to family-beneficiary trust for note. Uses smaller exemption (just seed).
Different mechanisms; complementary in thorough planning.
IDGT vs. GRAT:
– GRAT: grantor receives annuity back; potentially zero gift value – IDGT: grantor receives note interest back; small gift value (seed)
GRAT is simpler structure. IDGT works better for longer-term wealth transfers and assets that can’t easily generate annuity-style payments.
Combined GRAT + IDGT: GRAT for short-term assets; IDGT for longer-term assets.
IDGT vs. Dynasty Trust:
Dynasty trust is the long-term beneficiary structure. IDGT is the funding mechanism.
Combined: IDGT sells assets; receiving trust is structured as dynasty trust for multigenerational benefit.
IDGT vs. Direct Gift:
– Direct gift uses full exemption (e.g., $10M gift = $10M exemption used) – IDGT uses ~10% exemption (e.g., $9M sale = $900K seed + $900K-$1M of exemption) – IDGT requires real note (real interest payments); direct gift has no ongoing obligation
Net: IDGT preserves exemption for other purposes (SLAT, future planning); direct gift simpler but exhausts exemption.
For wealthy clients with $25M+ estates: combination approach optimal. 2025-2026 sunset consideration:
If exemption will sunset to $7M, locked-in $13.99M needs to be used. SLAT: uses exemption. Locks in higher amount. IDGT: uses minimal exemption. Doesn’t lock in higher exemption use. For 2025 funding: SLATs are higher priority for exemption use. IDGTs work alongside for additional capacity.
Execution Process
Setting up an IDGT:
1. Engage estate planning attorney (essential).
2. Draft trust document with: – Grantor trust trigger (typically §675(4) substitution power) – Beneficiary provisions – Trustee selection (independent of grantor) – Distribution standards – Investment provisions 3. Engage qualified appraiser for asset valuation. 4. Determine AFR for the funding month. 5. Calculate note terms (balance, term, interest rate, payment schedule). 6. Fund initial seed gift to trust. 7. Execute sale agreement: grantor transfers assets to trust in exchange for promissory note. 8. File Form 709 for seed gift (uses exemption).
9. Trust ongoing operations:
– Receive payments from trust assets (rent, dividends, business distributions) – Make required note payments to grantor – Track all transactions – File Form 1041 if required (grantor trust generally doesn’t need separate filing during grantor’s lifetime) 10. Annual review:
– Note payment status (timely?) – Trust performance – Adequacy of seeding (still 10%+?) – Tax position 11. Periodic adjustment:
– Substitute property if needed (using grantor’s substitution power) – Refinance note at maturity – Add additional seed funding if needed Professional team:
– Estate planning attorney – CPA experienced with IDGT and grantor trust tax – Appraiser (for valuations) – Independent trustee – Insurance professional (if life insurance funding the note repayment) Cost: IDGT establishment $25K-$75K. Annual administration $10K-$30K. Worth investment for $5M+ of intended transfers.
Common IDGT Pitfalls
Issues we see:
1. Inadequate seeding. Trust without sufficient equity may face IRS challenge as a sham. The 10% guideline is industry standard; less is risky.
2. Note below AFR. Below-market interest rate creates imputed interest under §7872. The ‘gift’ element uses additional exemption.
3. Grantor trust status accidentally lost. Without proper grantor trust trigger, trust becomes its own taxpayer. Tax burn benefit lost.
4. Estate inclusion provisions. Grantor retaining incidents of ownership, life estate, or revocation power causes estate inclusion. Defeats planning.
5. Inflated valuation. Selling assets to trust at inflated price reduces appreciation transfer to beneficiaries. The IRS doesn’t typically challenge inflated valuations (favoring tax), but family is worse off.
6. Deflated valuation. Selling at below-market price creates gift element. The gift portion uses exemption.
7. Missed note payments. Trust failing to pay note creates default. Note could be canceled (gift); grantor could enforce (creating tension).
8. Mortality during note term. Grantor dies before note paid down. Unpaid balance in estate. Estate tax on portion not yet paid down.
9. Not coordinating with other planning. IDGT standalone misses opportunities to combine with SLAT, dynasty trust, ILIT.
10. Substitution power abused. Substituting low-value assets in trust for high-value assets in grantor’s hands defeats planning purpose. Substitution must be for equivalent value.
Audit risk:
IRS has scrutinized IDGTs for various technical issues:
– Seeding adequacy – AFR compliance – Valuation accuracy – Substance over form Well-structured, documented IDGTs typically survive audit. Aggressive or sloppy IDGTs draw challenges. Keep detailed records: – All transactions – Note payment history – Valuation documentation – Grantor trust election support – Annual tax filings
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Frequently Asked Questions
What is an intentionally defective grantor trust idgt and why would I want one?
An intentionally defective grantor trust idgt is an irrevocable trust built so that it is finished property for estate tax but unfinished property for income tax. That split is the whole point, and the word defective is a label tax lawyers gave it decades ago, not a warning. You give assets away for transfer tax purposes, so they sit outside your taxable estate, yet you keep just enough control under the income tax rules that the IRS still treats you as the owner of the income. You pay the tax on what the trust earns even though the assets belong to your beneficiaries.
The estate side runs on the gift and estate provisions. A completed gift removes the asset and all of its future growth from your estate. The income side runs on the grantor trust rules at sections 671 through 679 of the Internal Revenue Code. You deliberately retain one of those powers, often the power to swap assets of equal value under section 675(4)(C), and that single retained power flips income tax ownership back to you without dragging the asset back into your estate. The estate and income systems use different tests, and the trust threads the needle between them. You can read the federal framing on the IRS page for estate and gift taxes.
Here is why people want it. When you pay the income tax on trust earnings, that payment is not a gift. The trust grows free of the drag of its own tax bill, and your estate shrinks by the tax you pay each year. Picture a trust holding 5 million dollars of assets that earn 250,000 dollars a year. If the trust paid its own tax at roughly 40 percent combined, it would lose 100,000 dollars annually. Because you pay that 100,000 instead, the trust keeps compounding on the full amount, and you have moved 100,000 a year out of your estate with no gift tax cost. Over a decade that is real money transferred to the next generation tax free.
We see this every year with clients who set the trust up and then panic the first April when the trust income lands on their personal return. That reaction is backward. The income tax bill is the feature, not a bug. The day the trust stops being a grantor trust is the day this advantage ends, so paying the tax is exactly what you signed up for.
One edge case worth flagging early. If your own cash flow is tight, paying tax on income you never receive can pinch. Some trusts include a reimbursement clause letting the trustee pay you back, but a mandatory reimbursement right can pull the assets back into your estate, so that clause has to stay discretionary and used with care. We model your liquidity before recommending the structure so the tax payments do not become a problem you did not plan for.
If you want to see whether the numbers work for your own balance sheet, our tax strategy consulting team runs the projection with your actual assets and growth assumptions. Start a conversation at our new client inquiry page and we will walk you through it.
How does the installment sale to an intentionally defective grantor trust idgt actually work?
The installment sale is the engine that makes the structure move serious value. You sell an appreciating asset to the trust in exchange for a promissory note, and because you and the trust are the same taxpayer for income tax, the sale is a non event. No capital gain, no recognized income, no tax on the transfer of the asset itself. That treatment comes from Revenue Ruling 85-13, where the IRS held that a grantor cannot have a taxable sale with his own grantor trust because he is dealing with himself.
The mechanics run in two steps. First you seed the trust with a real gift, usually around 10 percent of the value you plan to sell, so the trust has equity and the note is not the only thing backing it. That seed gift uses some of your lifetime exemption. Then you sell the appreciating asset to the trust for a note. The note has to carry interest at least at the applicable federal rate published monthly by the IRS, or the bargain element becomes a gift. The trust pays you interest, and at maturity it pays the principal, often as a balloon.
Run the numbers on a closely held business interest worth 4 million dollars. You first gift 400,000 dollars of cash or other assets to seed the trust. You then sell the 4 million dollar interest to the trust for a nine year note at the applicable federal rate, say 4 percent, which is 160,000 dollars of interest a year. If that business grows at 10 percent a year, it is throwing off far more than the note interest, and all of that excess growth stays in the trust for your beneficiaries. You froze the value in your estate at 4 million plus the note, while the upside escaped. Because of Revenue Ruling 85-13, the interest the trust pays you is not even taxable income to you, since you are paying yourself.
We see this every year. The mistake is a thin or missing seed gift. If the trust has almost no equity and is nothing but a note, the IRS can argue the note is really a retained interest and try to pull the whole asset back into your estate under section 2036. The 10 percent seed is the cushion that defeats that argument, and skipping it to save exemption is false economy.
An edge case lives at the valuation of the asset you sell. If the asset is a minority interest in a family entity, you may claim discounts for lack of control and lack of marketability, which lowers the value you are selling and stretches your exemption further. Those discounts have to rest on a defensible appraisal, because an aggressive discount the IRS knocks down can turn part of your sale into an unplanned taxable gift. The entity itself usually needs to be built correctly first, which is where our entity formation and structuring work comes in.
The interaction of the note, the seed, and the appraisal is where these deals succeed or fail. Our tax strategy consulting group coordinates the appraiser, the note terms, and the trust drafting so the pieces fit. Reach us through the new client inquiry form to map your own sale.
Which grantor trust powers under sections 671 through 679 make the trust defective?
The defect is a deliberate choice of which retained power you build into the trust. Sections 671 through 679 of the Internal Revenue Code list the powers and interests that make a grantor the income tax owner of a trust. You pick one that triggers income tax ownership but does not cause estate inclusion, and you avoid the ones that do both. Getting that selection right is the difference between a trust that works and one that quietly defeats your whole plan.
The most common choice is the power to substitute assets of equal value, held in a non fiduciary capacity, under section 675(4)(C). You keep the right to swap assets in and out of the trust as long as what you put in equals what you take out in value. That power makes you the income tax owner under the grantor trust rules, and the IRS confirmed in Revenue Ruling 2008-22 that a properly limited swap power does not by itself cause the trust assets to be included in your estate. It is the cleanest defect available, which is why so many trusts use it.
Other powers can do the job. The power to borrow trust funds without adequate security under section 675(2), or a power held by a non adverse party to add charitable beneficiaries under section 674, can each create grantor trust status. What you steer well clear of are powers that cause estate inclusion, such as retaining the right to the income, retaining a reversion worth more than 5 percent, or keeping broad control over who enjoys the property, because those reach back under sections 2036 and 2038 and undo the estate planning.
Picture the swap power in action. The trust holds stock with a basis of 200,000 dollars that is now worth 1 million dollars. As you approach the end of your life, you swap in 1 million dollars of cash and take the low basis stock back into your own hands. When you die, that stock gets a basis step up to fair market value under section 1014, wiping out the 800,000 dollars of built in gain. The swap power did double duty: it made the trust defective during your life and let you reclaim low basis assets for a step up at the end. That is the kind of move the section 671 through 679 powers enable when chosen with intent.
We see this every year. Someone copies a trust form off the internet and retains a power that triggers both income tax ownership and estate inclusion, often a reversion or a right to trust income. The trust is defective in the bad sense, the assets sit in the estate anyway, and the client paid income tax for nothing. The retained power has to be the right one, drafted in the right capacity.
An edge case is renouncing the power. If you ever release the swap power, the trust stops being a grantor trust and the trust starts paying its own tax going forward, which can be a planned exit or an accidental disaster depending on whether you meant to do it. We document which power makes the trust defective and what happens if it ends. Bring your trust to our tax strategy consulting team through the new client inquiry page and we will tell you which lever you are actually pulling.
How is the trust reported and what happens to basis when I die?
While the trust is a grantor trust, the reporting is simpler than people expect. All of the trust income, deductions, and credits flow straight onto your personal Form 1040 as if the trust did not exist for income tax. You report the dividends, interest, and capital gains the trust earned on your own return and pay the tax personally. The trust files a Form 1041, but for a fully grantor trust that filing is often an information only return with a statement attached, rather than a return that computes and pays its own tax. You can review the trust return basics on the IRS page for Form 1041.
The gift side has its own paperwork. The seed gift you make to fund the trust, and any later gifts, get reported on a gift tax return, Form 709, for the year of the gift. You generally owe no tax until you exhaust your lifetime exemption, but the return is how you track exemption used and start the clock on the statute of limitations for valuation. The IRS describes that filing on the page for Form 709. For administering everything after a death, the IRS guide is Publication 559, which covers survivors, executors, and administrators.
Basis at death is where this structure has a real weakness people forget. Assets you give away during life carry over your original basis. They do not get the step up to fair market value that assets in your taxable estate receive under section 1014. So the very assets you moved out of your estate to save estate tax keep their old low basis, and your beneficiaries inherit that built in gain. You traded an estate tax saving for a future income tax cost on the appreciation.
Run the trade off. Say you moved a 1 million dollar asset out of your estate with an original basis of 100,000 dollars. You saved roughly 400,000 dollars of estate tax at a 40 percent rate. But your heirs now hold an asset with a 100,000 dollar basis, so if they sell at 1 million they face capital gains tax on 900,000 dollars, perhaps 200,000 dollars or more in federal and state tax. The estate tax saving usually still wins for a highly appreciated asset, but not always, and the swap power exists precisely so you can pull low basis assets back for a step up when the math points that way.
We see this every year. A family removes a low basis asset to save estate tax, the estate turns out to be under the exemption anyway, and the heirs eat a capital gains bill that the asset never needed to carry. The reporting on Form 1041 and Form 709 is routine. The basis decision is the one that needs judgment, and it is best made years before death, not discovered after.
Our individual tax return preparation team handles the grantor trust reporting on your 1040 each year, and our planners track the basis question so the swap power gets used in time. Start at the new client inquiry page and we will set up the reporting correctly from year one.
With the 2026 exemption where it is, is an intentionally defective grantor trust idgt still worth it?
Yes, for the right balance sheet it still works, and for some families 2026 makes it more attractive rather than less. The federal estate and gift exemption is high right now, which means you can seed and sell to the trust using a large lifetime exemption without triggering gift tax. The relevant figures are published by the IRS on the estate and gift taxes page, and you should confirm the current year amount there before acting, because these numbers move with inflation adjustments and legislation.
The case for acting rests on three levers that do not depend on the headline exemption. First, the income tax burn. Even if your estate is under the exemption today, paying the trust tax still shifts wealth to your beneficiaries free of gift tax every year. Second, growth removal. Any appreciation after the sale escapes your estate no matter what the exemption does later. Third, the freeze. The installment sale locks the value in your estate at the note balance, so a fast growing asset is best moved sooner rather than later.
Walk through a 2026 plan. Suppose you have a 12 million dollar estate and an asset growing at 8 percent a year. You seed a trust and sell a 6 million dollar interest to it on a note. Over ten years that 6 million, growing at 8 percent, roughly doubles to about 13 million, and the roughly 7 million of growth sits in the trust outside your estate. At a 40 percent estate tax rate that growth alone would have cost your heirs around 2.8 million in estate tax had it stayed in your name. The exemption covered your seed gift, the note froze the base value, and the income tax you paid each year sweetened the transfer further.
We see this every year as exemption deadlines approach. Families rush to act in December and discover the appraisal of a closely held interest cannot be done responsibly in three weeks, or that the trust drafting and the note terms got compressed and sloppy. A defensible plan takes months, not days. If a high exemption has a sunset on the calendar, the work starts the spring before, not the week before.
An edge case is your state. New York has its own estate tax with a much lower threshold than the federal one and a cliff that can tax the entire estate once you cross it. A trust that looks unnecessary against the federal exemption can still save a meaningful New York estate tax, so for a New York family the structure can pay off at asset levels well below the federal line. That state layer is exactly why a city specific review matters.
Whether the 2026 numbers favor the structure for you depends on your estate size, your state, and how fast your assets grow. Our tax strategy consulting team runs that analysis with current figures, and our entity formation and structuring group builds the entity if discounts are part of the plan. Tell us about your situation through the new client inquiry page and we will give you a straight answer.