GRATs (Grantor Retained Annuity Trusts) for Equity: Zeroed-Out Math

A founder holds $10 million of pre-IPO stock that she believes will 4x over the next two years. Her estate planner suggests a two-year zeroed-out GRAT. She transfers the stock into an irrevocable trust that agrees to pay her a fixed annuity back over two years. The annuity is sized so that, at the IRS-mandated §7520 rate (around 4.8% in April 2026), the present value of the annuity equals the value of the stock contributed. Gift tax on the transfer: essentially zero.

If the stock performs as expected and quadruples to $40 million over two years, the GRAT pays her annuity of $10.5 million ($5.25M/year for two years) and the remaining $29.5 million passes to her heirs free of gift and estate tax. If the stock stays flat or declines, she receives back the full value in annuity payments and the GRAT “fails” with minimal cost beyond legal fees.

The GRAT is the tax code’s most elegant gift-tax-free mechanism for transferring appreciation. For founders with highly volatile, high-expected-return positions, GRATs can move enormous value to heirs with no use of the lifetime gift and estate tax exemption.

The mechanics under IRC Section 2702

IRC §2702 governs transfers to family members with retained interests. Generally, a retained interest in a family trust is valued at zero (the full value is a gift to the remainder beneficiary). §2702(b)(1) provides an exception: a “qualified interest” is valued using standard valuation methods.

A qualified annuity interest under §2702 is a right to receive fixed amounts at least annually. The annuity must be specified in the trust document and payable regardless of the trust’s income or principal sufficiency.

The GRAT is structured to use this qualified-interest exception:

Grantor transfers assets to the irrevocable GRAT.
GRAT pays grantor a fixed annuity for a specified term (typically 2-10 years).
At term end, any remaining assets pass to the remainder beneficiaries (typically heirs or a separate trust for heirs).

The gift to the remainder beneficiaries is valued at grant date as: contribution value minus present value of annuity stream. If the annuity is sized so the present value equals the contribution (at the §7520 rate), the gift is zero.

The §7520 rate: the key variable

The §7520 rate is published monthly by the IRS. It is 120% of the mid-term applicable federal rate (AFR). The April 2026 §7520 rate is approximately 4.8% (specific rate set monthly; verify before funding).

The §7520 rate is the hurdle rate for GRAT success:

Assets that grow faster than §7520 rate: excess passes to heirs tax-free.
Assets that grow at §7520 rate: GRAT “zeros out,” no wealth transferred.
Assets that grow slower than §7520 rate: annuity payments return to grantor; GRAT “fails” but costs nothing beyond legal fees.

Lower §7520 rates favor GRATs (easier to beat). Higher §7520 rates raise the bar. The rate shifts with interest rate cycles; GRAT planning adjusts to the current rate.

Zeroed-out vs partially-funded GRATs

Zeroed-out GRAT. The remainder gift is calculated to be zero (or as close to zero as possible). Annuity payments are sized to equal the contribution plus §7520 accretion.

Upside: no use of gift tax exemption. Unlimited leverage.
Downside: all contributed assets come back as annuity if no appreciation; grantor still holds those assets in estate.

Partially-funded GRAT. The remainder gift is greater than zero; uses some lifetime exemption. Often structured with a smaller annuity that leaves a larger remainder.

Upside: if grantor has lifetime exemption available, larger remainder accelerates value transfer.
Downside: uses exemption.

Zeroed-out is the standard for founders. It maximizes the transfer potential without consuming exemption.

Walton v. Commissioner: the zeroed-out path

Walton v. Commissioner (115 T.C. 589 (2000)) established that zeroed-out GRATs are allowed. Previously, the IRS had argued that GRATs with annuities exceeding 5% or 10% of initial value were abusive; the Tax Court rejected this and approved the zeroed-out structure.

Post-Walton, zeroed-out GRATs became the standard. The IRS has periodically proposed regulations to eliminate or restrict zeroed-out GRATs (most recently in 2020-2022 proposals), but no such regulations have been finalized as of 2026.

Short-term vs long-term GRATs

Short-term GRAT (2-3 years). Lower risk of grantor death during the term. Smaller “estate tax gross-up” if grantor dies before term (all assets in grantor’s estate). Lower annuity per year (cumulative annuity spread over longer period; but typically structured for shorter duration). Used for volatile high-upside assets.

Long-term GRAT (5-10 years). More exposure to grantor mortality (if grantor dies during term, the remainder interest is included in grantor’s estate). Longer compounding window. Used when grantor is young and healthy.

Grantor age and health affect choice. A 40-year-old founder might use 5-year GRATs; a 70-year-old might use 2-year GRATs.

Rolling GRATs

Short-term GRATs can be rolled: as each GRAT’s term ends and annuity is returned, the returned assets fund a new GRAT. This creates a multi-year sequence of overlapping GRATs.

Advantages:

Each individual GRAT has low mortality risk.
Failed GRATs (no appreciation) are replaced; successful GRATs lock in transferred value.
Flexibility to adjust to changing markets.

Cost: administrative overhead of running multiple GRATs simultaneously. Most estates with substantial founder equity use GRAT rolling as standard practice.

The mortality risk

If the grantor dies during the GRAT term, the remaining trust assets (to the extent required to produce the remaining annuity payments) are included in the grantor’s estate. For a fully appreciated GRAT near term end, substantially all assets are still in the grantor’s estate.

This is the primary risk of GRATs. A grantor who dies one week before GRAT termination has effectively wasted the GRAT.

Short-term GRATs (2 years) minimize this risk. Rolling short-term GRATs keep individual mortality exposure low.

Life insurance in a separate irrevocable life insurance trust (ILIT) can hedge GRAT mortality risk for larger programs.

A specific example

Founder Alice, age 45, funds a 2-year GRAT with $10M of pre-IPO Series B stock. §7520 rate: 4.8%.

Annuity payment calculation (per year for 2 years, with 50%/50% annuity front-loading allowed):

To produce zeroed-out remainder at §7520 rate, annuity payments total ~$10.78M over 2 years.
Payment 1 (end of year 1): ~$5.39M.
Payment 2 (end of year 2): ~$5.39M.

Scenario A: stock doubles over 2 years to $20M, then maintains value.

GRAT pays $5.39M end of year 1 (from trust assets).
GRAT pays $5.39M end of year 2 (from trust assets).
Total annuity: $10.78M to grantor.
Remaining in GRAT at end: $20M - (value of annuity payments) = approximately $9.2M.
This $9.2M passes to heirs free of gift and estate tax.

Scenario B: stock declines 30% to $7M over 2 years.

GRAT pays $5.39M in year 1 (may require in-kind payment of stock).
Remaining in GRAT: varies based on timing.
If stock stays low, second payment returns most remaining assets to grantor.
Net result: close to zero passed to heirs. Minimal cost (legal fees, administrative).

Scenario C: stock flat for 2 years.

Annuity payments total $10.78M; contributions were $10M; difference = §7520 accretion.
Grantor receives everything back. No wealth transferred. Small administrative cost.

Comparison: GRAT vs other transfer vehicles

Vehicle	Uses exemption	Transfer leverage	Grantor gets assets back
GRAT (zeroed-out)	None	Moderate to high	Yes, if no appreciation
SLAT	Yes, at transfer	High	Spouse has access
IDGT + installment sale	Small amount	Very high	No, but payments come back
Outright gift	Yes	1:1	No
Dynasty trust	Yes, at funding	Compounding	No

GRATs excel when assets have high expected volatility and upside. IDGTs excel with lower-volatility, steady-appreciation assets.

Frequently asked

Can I fund a GRAT with private company stock? Yes, and this is the classic use case. Appraisal is required to set the gift-value. Valuation discounts (DLOM, DLOC) can be applied to private stock, reducing the annuity needed.

What happens if the stock doesn’t produce enough cash to pay the annuity? The GRAT can pay the annuity in-kind (delivering stock back to the grantor at its then-current value). Common for pre-IPO GRATs.

Can I change the terms of a GRAT mid-term? Generally no. The GRAT is irrevocable. Some grantors use “decanting” provisions to modify trusts, but this requires careful drafting and can trigger IRS challenge.

What about state gift and estate tax? Some states have gift tax; most follow federal rules. GRATs are generally recognized in states that follow federal tax principles. Connecticut has a gift tax that follows specific rules.

Can GRATs hold options or SAFEs? Options with determinable value can go in. SAFEs are harder because of unclear conversion timing. Restricted stock is straightforward.

Next step

If you hold founder equity with high appreciation potential and are interested in wealth transfer, consult an estate planning attorney about GRATs this quarter. The §7520 rate changes monthly, which affects the annuity calculation. Fund the GRAT at a low §7520-rate month if possible. For rolling GRAT programs, establish the first GRAT and plan the sequence of refundings. Engage appraisal counsel for pre-IPO stock valuations.