Estate Planning for Concentrated Stock Positions

For many executives, founders, and long-tenured employees, a single stock represents not just a significant portion of their net worth — it is their net worth. Concentrated positions of 50%, 70%, even 90% of total wealth in one company are common. This creates a compounding problem at the intersection of investment risk and estate planning: the asset that built your wealth is also the asset most likely to complicate, and potentially devastate, what you leave behind. This guide covers every major strategy for addressing the concentrated stock problem without triggering unnecessary income tax — and explains how to choose among them.

1. The Concentrated Stock Problem

A concentrated stock position is not simply a financial inconvenience — it is a structural vulnerability in your estate plan. The mechanism by which it develops is well understood: founders receive large equity stakes at nominal valuations; executives accumulate ISOs, NSOs, RSUs, and ESPP shares over a decade or more; long-tenured employees watch a single holding grow to dominate their portfolio. In each case, the result is the same: an outsized single-stock position with a very low cost basis.

This creates two distinct problems that estate planners must address simultaneously:

Risk Concentration

A single-stock blow-up can permanently impair generational wealth. Unlike a diversified portfolio, there is no mean reversion across a collection of positions when you own only one. The empirical record is unforgiving: a meaningful percentage of individual stocks in any given decade lose 75% or more of their value, many permanently. Executives who accumulate wealth through equity compensation are running a concentrated bet on one company's future, and that bet has no built-in diversification mechanism.

The estate planning dimension makes this worse. If the stock declines sharply after your death but before your estate is closed, your heirs may face estate tax calculated on the stock's higher-of-death-or-alternate-valuation value — potentially paying tax on wealth that no longer exists by the time the bill is due.

Estate Tax Exposure on an Illiquid Asset

Federal estate taxes — 40% on amounts above the $15 million exemption in 2026 — are due in cash within nine months of death, regardless of what form your estate takes. A $50 million estate that consists primarily of a single illiquid or restricted stock position creates a forced-sale problem: heirs must either sell a large block of stock into the market (at a potentially depressed price, with market impact) or liquidate other assets to fund the tax bill.

For executives with insider status, there is a compounding restriction: trading windows, Rule 144 volume limitations, and lock-up periods may prevent heirs from selling stock quickly even if they want to. The estate becomes a hostage to market conditions and regulatory constraints precisely when liquidity is most needed.

Why You Can't Just Sell

The obvious solution — sell the concentrated position, pay the capital gains tax, reinvest in a diversified portfolio — is rarely optimal for executives. The reasons stack up quickly:

• Capital gains tax cost: A $20 million position with a $500K basis creates approximately $4.6 million in federal capital gains tax (at the 23.8% long-term rate including NIIT) on a direct sale — money that permanently leaves the family's wealth stack.
• State capital gains: In high-tax states (California, New York, New Jersey), state capital gains tax adds another 10–13%, bringing the all-in tax cost to well over 30%.
• Insider trading restrictions: Section 10(b) and Rule 10b-5 may restrict when and how public company insiders can sell, particularly around earnings announcements, M&A events, and material non-public information.
• Lock-up agreements: Post-IPO lock-up periods (typically 180 days) and contractual restrictions on founder shares often prevent immediate sales.
• Retention requirements: Many equity plans and employment agreements require executives to maintain minimum stock ownership levels while employed.

The estate planning challenge, therefore, is to address both risk concentration and estate tax exposure without triggering immediate income tax — and to do so within a framework that respects securities law constraints.

2. The Four Strategies: An Overview

Before diving into technical details, it helps to understand the landscape. The strategies available to executives with concentrated stock fall into four broad categories, each with different mechanisms, tax outcomes, and family wealth implications:

Each category is analyzed in depth below. The practical decision framework in Section 9 maps these strategies to specific executive scenarios.

3. Direct Gifting and Trust Transfers

The most direct approach to reducing the size of a concentrated stock estate is to give it away — to family members, heirs, or irrevocable trusts. The federal gift and estate tax system provides several powerful mechanisms for doing this efficiently.

Annual Exclusion Gifts

In 2026, each individual can give up to $19,000 per recipient per year without using any lifetime exemption and without filing a gift tax return. A married couple can combine their exclusions to give $38,000 per recipient annually through gift-splitting. For an executive with several children and grandchildren, annual exclusion gifting alone can transfer meaningful quantities of stock over time. An executive who begins annual exclusion gifting to four adult children at age 50 can transfer approximately $1.5 million of stock (at $38,000 per child per year, gift-split) over ten years — before any lifetime exemption is needed.

Annual exclusion gifts of appreciated stock carry over the grantor's basis to the recipient (carryover basis), so the recipient will owe capital gains tax when they eventually sell. This makes annual exclusion gifting most advantageous for stock expected to continue appreciating, where the transfer of future gains to lower-bracket recipients provides additional tax savings.

Lifetime Gift Tax Exemption ($15 Million in 2026)

The One Big Beautiful Budget Act (OBBBA) permanently set the federal lifetime gift and estate tax exemption at $15 million per person (indexed for inflation from 2027), unified with the estate tax. For married couples, this creates a $30 million combined exemption. Amounts transferred during life or at death above this threshold are subject to the 40% federal estate tax rate.

The key insight: gifts of concentrated stock made today use exemption at today's stock value. If the stock subsequently appreciates dramatically, all of that post-gift appreciation passes to heirs completely free of estate tax. This makes using exemption early in a high-growth stock's trajectory extraordinarily valuable.

GRATs — The Power Tool for High-Volatility Stock

A Grantor Retained Annuity Trust (GRAT) is the most powerful wealth transfer technique specifically designed for concentrated, high-volatility stock. Here is how it works:

1. The grantor transfers stock to an irrevocable trust and retains an annuity payment for a fixed term (commonly 2–10 years).
2. The IRS calculates the "gift" element as the present value of the remainder interest after subtracting the annuity stream, using the Section 7520 rate (the IRS hurdle rate — essentially 120% of the applicable federal mid-term rate).
3. The GRAT is structured so that annuity payments "zero out" the gift — meaning if the stock grows at exactly the 7520 rate, no gift occurs. Any growth above the hurdle rate passes to heirs gift-tax free.
4. If the stock underperforms, the assets simply revert to the grantor — no gift tax is owed and no exemption is consumed. The grantor can simply run a new GRAT ("rolling GRATs").

GRATs: Key Considerations

• Mortality risk: If the grantor dies during the GRAT term, the assets are pulled back into the taxable estate. Shorter terms reduce this risk; "rolling" two-year GRATs are a common hedge.
• Volatility advantage: GRATs work best with high-volatility stock. The grantor captures upswings for heirs while the downswing risk (stock returns to grantor) is merely the status quo.
• Section 7520 rate environment: In higher-rate environments, the hurdle is harder to clear. GRATs remain attractive for high-growth stock even at elevated rates.
• Zeroed-out vs. taxable GRATs: A true zeroed-out GRAT has a negligible gift amount. Some practitioners prefer a small taxable remainder to ensure the GRAT is respected as a valid gift transaction.

SLATs (Spousal Lifetime Access Trusts)

A Spousal Lifetime Access Trust (SLAT) is an irrevocable trust to which the executive makes a gift, naming their spouse as a lifetime beneficiary. The trust removes assets from the executive's taxable estate while preserving indirect access through the spouse. SLATs are particularly powerful for concentrated stock because they can hold a large block of stock removed from the estate, yet the spouse's beneficiary interest maintains the family's access to income and principal. See our detailed guide to SLATs for executives for a full treatment.

One critical caution: two spouses may not each create a SLAT naming the other spouse as beneficiary (the "reciprocal trust doctrine" invalidates mirror-image trusts). Planning must ensure the trusts are sufficiently different in terms and timing.

IDGTs — Installment Sales to Defective Trusts

An Intentionally Defective Grantor Trust (IDGT) is an irrevocable trust that is treated as outside the grantor's estate for estate tax purposes, yet is treated as owned by the grantor for income tax purposes. This tax mismatch is extraordinarily powerful:

• The grantor can sell concentrated stock to the IDGT in exchange for a promissory note, at fair market value, with no capital gains recognized at sale (because a grantor and their grantor trust are treated as the same entity for income tax purposes).
• The IDGT pays interest on the note (at the applicable federal rate — typically 4–5% in 2026), but the trust pays no income tax to the grantor on trust income — all trust income escapes estate tax while being taxed to the grantor as if it were their own income.
• The appreciation in the trust between the sale price and the estate tax date escapes estate tax entirely, while the grantor's note payments amortize over time.

An installment sale to an IDGT is one of the most powerful techniques for large concentrated positions — it can move $20M–$50M+ of stock out of the estate at today's value while deferring income tax indefinitely.

Family LLC Funding

Contributing concentrated stock to a Family Limited Liability Company (FLLC) or Family Limited Partnership (FLP) allows the executive to transfer minority interests at a valuation discount (typically 15–30% for lack of control and marketability). This leverages the lifetime exemption: a $20M stock position in an FLLC might generate minority interests with an aggregate value of $14–17M after discounts, allowing more stock to be transferred per dollar of exemption used.

IRS scrutiny of valuation discounts is substantial. The FLLC must have a legitimate business purpose beyond tax savings, must be respected as a genuine partnership entity, and the contributing partners must not retain too many incidents of control over the underlying assets.

Section 1244 Considerations

If a concentrated stock position involves original-issue stock in a small business and the company fails, Section 1244 allows shareholders to deduct up to $100,000 ($200,000 for joint filers) per year as an ordinary loss — rather than a capital loss — on the stock's full loss. For estate planning purposes, stock that qualifies under Section 1244 at issuance retains that qualification regardless of subsequent transfers, making it relevant when planning transfers of founder shares in early-stage companies.

4. Charitable Strategies

Charitable giving and concentrated stock planning have a natural synergy: charitable vehicles can sell appreciated stock without capital gains tax, generating immediate deductions and long-term family planning benefits. For executives with meaningful charitable intent, charitable strategies are often the highest-impact tools available.

Charitable Remainder Trusts (CRTs)

A Charitable Remainder Trust (CRT) is an irrevocable split-interest trust: the non-charitable interest (an income stream) goes to the donor and/or their family; the charitable interest (the "remainder") goes to one or more charities at the trust's termination. The mechanics for concentrated stock are straightforward and extraordinarily powerful:

1. The executive contributes appreciated, low-basis stock to the CRT at fair market value.
2. The CRT sells the stock inside the trust, tax-free (the trust is exempt from income tax on the sale).
3. The CRT reinvests the full pre-tax proceeds in a diversified portfolio.
4. The executive (and/or spouse) receives an income stream — either a fixed dollar amount (CRAT) or a fixed percentage of trust value (CRUT) — for life or a term of years up to 20.
5. The executive receives a charitable income tax deduction in the year of contribution equal to the actuarial present value of the charitable remainder.
6. At termination, the remaining trust assets pass to the named charitable beneficiaries.

For a $10 million position with a $200K basis, a CRT contribution potentially eliminates $2.3 million of capital gains tax that would have been owed on a direct sale, converts the full $10 million into a diversified income-producing portfolio, and generates a charitable deduction of $2–$4 million depending on the income stream terms. See our Tax Planning Guide for additional detail on charitable deduction mechanics.

CRAT vs. CRUT

Two-step strategy (CRT + ILIT for wealth replacement): A common technique pairs a CRT with an Irrevocable Life Insurance Trust (ILIT). The executive uses a portion of the CRT income stream to pay premiums on a life insurance policy held inside the ILIT. At death, the insurance proceeds (income-tax free, estate-tax free if held in an ILIT) pass to heirs — effectively "replacing" the wealth donated to charity, while the charitable deduction and capital gains bypass more than fund the insurance cost. Learn more in our Life Insurance Guide.

Donor-Advised Funds (DAFs)

A Donor-Advised Fund is the simplest and most flexible charitable vehicle for executives who want a charitable deduction without the complexity of a CRT or private foundation. The mechanics:

• Contribute appreciated stock to a DAF sponsored by a public charity (Fidelity Charitable, Vanguard Charitable, Schwab Charitable, and others).
• Receive an immediate charitable deduction at the stock's fair market value — up to 30% of AGI for DAF contributions (with five-year carryforward).
• The DAF sells the stock tax-free and reinvests proceeds.
• You recommend grants to specific charities over time (the sponsoring organization has legal control but almost always follows donor recommendations).

DAFs are ideal for executives who want to "bank" a large charitable deduction in a high-income year (e.g., the year of stock option exercise or IPO) and distribute grants over many years. They require no minimum ongoing commitment and no trust attorney. However, unlike CRTs, DAFs provide no income stream back to the donor — the contribution is irrevocable and the assets will ultimately flow only to charity.

Private Foundations

For families with a substantial, long-term charitable commitment — generally $5 million or more — a private foundation provides maximum control over grant-making, investment policy, and philanthropic strategy. The deduction for gifts of appreciated publicly-traded stock to a private foundation is limited to 20% of AGI (vs. 30% for DAFs), and excess deductions carry forward five years. Private foundations are subject to minimum distribution requirements (5% of assets annually), excise taxes on investment income, and extensive annual reporting obligations (Form 990-PF).

The family governance dimension is often the true driver: a foundation creates a formal structure for multigenerational philanthropy, employs family members, and provides a vehicle for teaching children and grandchildren about investing, grant-making, and stewardship.

Charitable Lead Trusts (CLTs)

A Charitable Lead Trust is the structural inverse of a CRT: the charity receives the income stream during the trust term, and the family receives the remainder at termination. CLTs are most powerful in low-interest-rate environments because the present value of the charitable lead interest is inversely related to the 7520 rate — a lower rate makes the charitable interest worth more on paper, reducing the taxable gift to family remaindermen.

In a Grantor CLT, the grantor is taxed on trust income and receives a charitable deduction. In a Non-Grantor CLT, the trust pays its own income taxes but the grantor receives an upfront gift tax deduction. CLTs are complex vehicles often recommended when the family wants to benefit charity now and heirs later, particularly in estates where the primary goal is multigenerational transfer rather than current income.

Charitable Vehicle Comparison

5. Hedging Without Liquidation

When an executive cannot or will not liquidate their concentrated position — due to lock-up periods, retention requirements, insider trading restrictions, or personal reasons — financial hedging strategies can reduce economic exposure without triggering a taxable sale. These strategies operate in the space between a full sale and doing nothing, but they carry significant legal and tax complexity.

Variable Prepaid Forwards (VPFs)

A Variable Prepaid Forward (VPF) is an agreement with a counterparty (typically an investment bank) in which the executive receives an upfront cash payment today in exchange for an obligation to deliver shares (or a cash equivalent based on future share prices) at a specified future date. Key characteristics:

• Tax deferral: The executive receives cash now but does not recognize capital gains until the delivery date — potentially several years in the future. This defers the taxable event, giving time to plan.
• Variable delivery: The number of shares (or cash) delivered at the forward date varies with the stock price at settlement — the executive delivers fewer shares if the stock has risen, more if it has fallen. This variable element is critical to avoiding the constructive sale rules.
• Section 1259 risk: A VPF that eliminates too much of the upside (using too tight a collar) risks being recharacterized as a constructive sale. The floor-to-cap ratio must be wide enough to preserve meaningful participation in stock upside.
• Estate planning interaction: The upfront proceeds from a VPF are available for other estate planning purposes (ILIT premiums, trust funding, diversification). However, the stock subject to the VPF is still typically included in the estate at death pending delivery.

Collar Strategies

A collar combines a protective put (purchased by the executive to cap downside) with a covered call (sold by the executive to fund the put premium). The result is a "collar" around the stock price — the executive is protected below the put strike and capped above the call strike. Collars provide:

• Downside protection: If the stock falls below the put strike, losses are eliminated (the put pays off).
• Cost efficiency: Selling the call funds some or all of the put premium, making the hedge cheaper or free ("zero-cost collar").
• Retained upside: Unlike a VPF, the executive retains the stock and participates in gains up to the call strike.

The tax treatment of collars is nuanced. The put and call must be analyzed under both Section 1259 (constructive sale) and Section 1092 (straddle rules), which can suspend loss deductions and complicate the basis treatment of both legs. Zero-cost collars are the most scrutinized structure; a call strike substantially above the put strike is generally necessary to avoid constructive sale treatment.

Equity Swaps

A total return equity swap allows the executive to exchange the economic return of the concentrated stock (price appreciation plus dividends) for a different return (e.g., a floating rate or index return), effectively achieving synthetic diversification without selling the underlying shares. Equity swaps are complex derivatives typically available only to accredited investors through institutional counterparties, and they are subject to both Section 1259 (constructive sale if the swap eliminates all risk and reward) and potential PFIC and other exotic tax rules if used with offshore counterparties.

Insider Trading and 10b5-1 Plan Integration

For officers and directors of public companies, all hedging strategies must be executed in compliance with securities laws. The critical tool is a 10b5-1 plan — a pre-arranged, written plan for future transactions that provides an affirmative defense against insider trading liability. By entering a 10b5-1 plan during an open trading window, when the executive has no material non-public information, all subsequent transactions under the plan are presumed to be made in good faith. Our dedicated guide to 10b5-1 plans covers the SEC's 2023 rule amendments (cooling-off periods, single-trade plan limitations, overlapping plan restrictions) in detail.

Key considerations for hedging transactions under 10b5-1:

• The plan must be adopted in good faith, not as part of a scheme to evade insider trading prohibitions.
• The 2023 SEC amendments require a 90-day or 120-day (for officers and directors) cooling-off period between plan adoption and first trade.
• Certain hedging transactions by Section 16 insiders must be reported and may be subject to short-swing profit recapture rules.

6. Exchange Funds

Exchange funds — sometimes called swap funds — represent one of the cleanest solutions to the concentrated stock problem for executives who primarily want diversification without the immediate tax cost of a sale. They are technically elegant, but they come with meaningful constraints.

How Exchange Funds Work

An exchange fund is a private investment partnership (typically structured as a limited partnership or LLC) that accepts concentrated stock contributions from multiple investors in exchange for proportional partnership interests. By pooling the contributions of dozens or hundreds of investors — each holding a different concentrated position — the fund creates a naturally diversified portfolio without any participant having to sell their stock and pay capital gains tax.

The tax treatment is governed by IRC Section 721(a), which provides that no gain or loss is recognized on a contribution of property to a partnership in exchange for a partnership interest. The contributor's basis in the partnership interest equals their carryover basis in the contributed stock — meaning the built-in gain is preserved (deferred, not forgiven) but there is no current recognition event.

The Seven-Year Holding Requirement

The catch: to qualify under Section 721(a)'s non-recognition treatment for exchange funds, Reg. Section 1.731-1 and related partnership tax rules require investors to hold their partnership interest for at least seven years before redemption. Additionally, the fund must hold at least 20% of its assets in qualifying illiquid investments (real estate or similar assets) to prevent the fund from being treated as a disguised sale arrangement under Section 707.

During the seven-year holding period, the investor cannot redeem their partnership interest without triggering gain recognition. This liquidity constraint is the principal cost of the exchange fund strategy and must be weighed carefully by executives who may have near-term liquidity needs.

Basis and Estate Planning Advantages

The carryover basis feature of exchange funds creates a potent estate planning opportunity: if the investor holds the fund interest until death, heirs receive a stepped-up basis (under IRC Section 1014) on the full fair market value of the partnership interest. This means the entire built-in gain — the capital gains that were deferred, not forgiven — is permanently eliminated. The exchange fund has converted a low-basis concentrated stock position into a stepped-up, diversified estate asset.

For an executive with a $20 million concentrated position and a $500K basis, the math is stark: direct sale generates approximately $4.6 million in capital gains tax. Exchange fund followed by holding until death: $0 in capital gains tax, ever. The seven-year lockup is the price of a $4.6 million permanent tax savings.

Practical Considerations

• Minimums: Most exchange funds require minimum contributions of $1 million to $5 million of a single stock position. Some top-tier funds have minimums of $10 million or more.
• Accepted stocks: Exchange fund managers are selective about which stocks they accept — they need a diversified portfolio across sectors, so there may be limited capacity for any one stock, and they typically will not accept thinly traded or restricted shares.
• Investment control: Investors in exchange funds surrender control over the investment of their contributed stock. The fund's investment manager makes portfolio decisions for the pool.
• Major sponsors: Prominent exchange fund sponsors include Eaton Vance (now part of Morgan Stanley), Stone Ridge Asset Management, Cache Exchange, and several large private banks. Access typically requires a relationship with a private wealth advisor.
• Fees: Management fees, advisory fees, and redemption fees can be substantial. The economic cost of the fee drag must be compared against the tax savings.

QSBS Caution in Exchange Funds

Executives with QSBS (qualified small business stock under Section 1202) should exercise caution before contributing QSBS to an exchange fund. Contributing QSBS to a partnership may terminate the QSBS holding period or cause the stock to fail the original-issue requirement for Section 1202 purposes, potentially destroying a very valuable exclusion. Confirm the QSBS analysis with a tax attorney before contributing to any exchange fund.

7. QSBS Considerations

For founders and early employees of qualified small businesses, Section 1202 Qualified Small Business Stock (QSBS) is potentially the most valuable single provision in the entire tax code — a complete exclusion from federal capital gains tax on up to $10 million of gain (or 10× adjusted basis) per holder. The estate planning implications of QSBS are profound and frequently underutilized.

Section 1202 Basics

Section 1202 provides a federal income tax exclusion for gain on the sale of QSBS held for more than five years. The exclusion is 100% for stock acquired after September 27, 2010. To qualify:

• The stock must be original-issue stock (purchased directly from the corporation, not in a secondary market transaction).
• The corporation must be a domestic C corporation that was a "qualified small business" — with aggregate gross assets not exceeding $50 million at the time of issuance (including post-issuance proceeds).
• The business must be in a qualifying industry (most technology, manufacturing, and service businesses qualify; finance, real estate, professional services, hospitality, and farming do not).
• The taxpayer must hold the stock for more than five years.
• The exclusion applies per taxpayer per company — the $10M or 10× cap applies separately to each holder.

QSBS Stacking via Non-Grantor Trusts

The most powerful QSBS planning strategy is "stacking" — multiplying the per-holder exclusion by gifting QSBS to multiple separate non-grantor trusts, each of which counts as an independent holder. Because each non-grantor trust is a separate taxpayer for federal income tax purposes, each trust can exclude up to $10 million of QSBS gain independently of all other trusts and the founder's individual exclusion.

A founder who gifts QSBS to five separate non-grantor trusts — one for each of three children and two SLATs — creates six independent holders (five trusts plus the founder), potentially excluding $60 million of gain from federal income tax. Add a spouse who also received original-issue QSBS, and the exclusion can reach $70 million or more.

Timing and the Five-Year Clock

QSBS gifts to trusts must be made early enough that the trust can establish its own five-year holding period before the company is sold or the stock is otherwise disposed of. For companies approaching a sale or IPO, the QSBS planning window may be short. Transfers to non-grantor trusts reset the five-year clock for the recipient trust — the original issuance date to the grantor does not tether the trust's holding period. Tax counsel should confirm the specific holding period analysis for each proposed structure.

State Tax Treatment

Not all states conform to the federal QSBS exclusion. California, for example, does not recognize the Section 1202 exclusion, meaning California residents pay full state capital gains tax on QSBS gain even if fully excluded federally. A comprehensive QSBS plan must account for state tax exposure — including whether a domicile change before the sale event is feasible and appropriate. See our State Guides for state-specific estate and income tax analysis.

8. The Tax Basis Question

The basis of concentrated stock is the foundation of virtually every planning decision. Understanding the basis rules — and the opportunities they create — is essential before choosing any strategy.

Carryover Basis on Gifts

When you gift appreciated stock to another person or to a trust, the recipient takes your cost basis — the same low number you paid when the stock was issued. This is "carryover basis" under IRC Section 1015. When the recipient eventually sells, they will owe capital gains tax on the difference between the sale price and your original basis. For gifts of low-basis stock, this means the built-in gain follows the stock — the gain is deferred but not forgiven.

Practical implication: gifting low-basis stock does not eliminate the income tax problem; it transfers it to the recipient. For recipients in lower income tax brackets, or for trusts that won't sell for many years, this may still be advantageous — but the gain does not disappear.

Stepped-Up Basis at Death (Section 1014)

The most powerful basis rule in the tax code for concentrated stock planning is the Section 1014 step-up: when an asset passes at death, the recipient takes a new basis equal to the asset's fair market value at the date of death. Built-in gain accumulated over a lifetime is permanently forgiven — the capital gains tax that would have been owed on a lifetime sale is completely eliminated.

For a $20 million concentrated stock position with a $500K basis, dying with the stock (rather than selling it) eliminates approximately $4.6 million in capital gains tax permanently. The heirs can immediately sell the inherited stock without paying any capital gains on the appreciation that accrued during the decedent's lifetime.

Strategic Implications: What to Gift vs. What to Hold

The combination of carryover basis on gifts and stepped-up basis at death creates a clear planning heuristic:

• Hold low-basis stock until death to eliminate built-in gain via the Section 1014 step-up. The larger the unrealized gain relative to your remaining estate tax exposure, the stronger this argument.
• Gift high-basis stock during life (or give cash) to transfer wealth without passing along embedded gain. If the stock has a basis equal to or near its current fair market value — as may be the case with recently exercised RSUs, recently vested stock, or stock acquired near a recent price — the carryover basis transfer is not penalizing.
• Use GRATs for high-appreciation stock: GRATs allow appreciation above the hurdle rate to pass to heirs without gift tax, while the grantor can be re-acquiring the lower-basis stock annuity payments (which will receive a step-up at death).

Grantor Trust Swap Powers

A grantor trust (including an IDGT, a GRAT, or a revocable trust) can include a "swap power" — allowing the grantor to substitute assets of equivalent value for trust assets. This is a powerful basis optimization tool. If a grantor trust holds high-basis stock that has appreciated since the transfer, the grantor can "swap" the appreciated trust stock for lower-basis assets of equal value held personally. The lower-basis stock re-enters the grantor's estate and receives a step-up at death, while the higher-basis stock remains in the trust (where heirs will eventually sell it with a better basis position).

Biden-Era Step-Up Elimination Proposal: Current Status

The American Families Plan (2021) proposed eliminating the step-up in basis at death and replacing it with a deemed realization event on death, triggering capital gains tax on unrealized appreciation at the time of transfer. This proposal was not adopted. As of 2026, the stepped-up basis at death under Section 1014 remains fully in effect. Executives should continue planning around the step-up as a reliable feature of the current tax code — while noting that it remains a perennial legislative target.

9. Practical Decision Framework

With eleven distinct strategies available (and combinations thereof), choosing the right approach requires a systematic analysis of each executive's specific facts. The matrix below maps key executive circumstances to the most relevant primary strategies.

The overriding analysis framework should evaluate seven dimensions for every executive situation:

1. Estate size vs. exemptions: Are you above or below the $15M federal exemption? Is state estate tax relevant? (See State Guides and Tax Planning Guide.)
2. Liquidity needs: Do you need access to the concentrated position's value within 7 years? CRTs, VPFs, and direct gifts preserve access; exchange funds do not.
3. Charitable inclination: Genuine charitable intent unlocks CRTs, DAFs, and foundations, which provide uniquely powerful combined income and estate tax benefits.
4. Family situation: Married vs. single; children vs. no children; blended families; beneficiaries with special needs — each changes the optimal trust structures.
5. Stock characteristics: High-volatility, pre-IPO stage stock is ideal for GRATs and QSBS stacking. Stable, dividend-paying stock may favor CRTs. Restricted or insider-held stock constrains hedging strategies.
6. Retention requirements: Executive minimum ownership requirements, unvested equity, and lock-ups limit what can be transferred at any given time.
7. Tax basis: Very low-basis stock (basis <5% of value) favors Section 1014 hold-to-death or CRT strategies. Higher-basis stock is more freely transferable.

10. Common Mistakes

• Selling the concentrated position without coordinating the estate plan first. The single most common mistake. An executive sells a $30 million position, pays $7 million in capital gains tax, and then begins estate planning — at which point most trust-based strategies (GRATs, IDGTs, QSBS stacking) are no longer available because the asset has already been liquidated. Estate planning must precede or accompany any major liquidity event, not follow it.
• Ignoring Section 1259 constructive sale rules when hedging. Entering into a collar or VPF that eliminates substantially all economic risk in the stock is a constructive sale — triggering capital gains tax without any cash proceeds from a sale. Every hedging strategy must be reviewed by a securities tax attorney with specific experience in derivative overlay strategies.
• Failing to use a 10b5-1 plan for estate planning-related trades. Public company insiders who sell shares, exercise options, or enter derivative transactions in connection with estate planning events — outside of a properly established 10b5-1 plan — face insider trading liability even if no MNPI was actually used. The 2023 SEC amendments added cooling-off periods and documentation requirements. See the 10b5-1 Plans guide.
• Not stacking the QSBS exclusion via trusts when eligible. Founders who hold qualifying Section 1202 stock and have three, four, or five potential non-grantor trust beneficiaries — and fail to transfer QSBS before the five-year clock runs for the trust — permanently forgo $10 million per trust in exclusion. This is an irreversible planning failure once the transfer window closes.
• Using mirror-image SLATs that violate the reciprocal trust doctrine. A husband and wife who each create a SLAT naming the other as beneficiary, with substantially identical terms executed at the same time, may have both trusts invalidated under the reciprocal trust doctrine — treating each trust as if the grantor created it for themselves, pulling the assets back into the gross estate. SLATs must be differentiated in terms, timing, assets, and beneficiary provisions.
• Ignoring state estate tax exposure. Many states impose estate taxes with much lower exemptions than the federal $15 million threshold. A $20 million estate may owe nothing to the IRS but still face a seven-figure state estate tax bill. See our State Guides for state-specific analysis, including states like Oregon ($1M exemption), Massachusetts ($2M exemption), and Washington ($2.19M exemption).
• DIY-ing strategies that require attorney and CPA coordination. GRATs, IDGTs, CRTs, and exchange fund transactions all require custom trust documents, correct execution under state law, proper appraisals of contributed assets, coordination with securities counsel, and ongoing income tax compliance. The cost of professional implementation is a small fraction of the tax savings. The cost of a DIY error — an invalidated trust, a failed 721(a) contribution, a missed QSBS transfer window — can be catastrophic and irreversible.

11. Implementation: Building the Right Team

Concentrated stock estate planning is not a single-advisor problem. It sits at the intersection of trust and estates law, securities law, income tax planning, investment management, and often family governance. Attempting to address it with any single advisor — however skilled in their own domain — is a structural mistake. The following is the minimum professional team required for effective implementation.

Estate Planning Attorney

The estate planning attorney is the structural architect of the plan. For concentrated stock planning specifically, they must have deep experience not just with trusts generally, but with the specific trust structures most relevant to executive compensation: GRATs, SLATs, IDGTs, charitable trusts, and dynasty trusts. Look for attorneys with ACTEC (American College of Trust and Estate Counsel) fellowship designation — the credential most reliably predictive of expertise at the level required for executive estate planning. General estate planning attorneys, even excellent ones, may not have the specialized GRAT or IDGT experience these engagements demand.

Tax CPA

The tax CPA handles income tax compliance for all trust structures, calculates the ongoing grantor trust income inclusions, files annual trust returns (Forms 1041, 709), and coordinates with the estate planning attorney on income tax optimization (basis swaps, grantor trust elections, QSBS qualification analysis). Big 4 firms with dedicated private client or executive compensation practices are typically best positioned for this work; boutique CPA firms that specialize exclusively in high-net-worth executive clients are also excellent choices.

Securities Counsel

For officers and directors of public companies, a securities attorney is essential whenever stock is being transferred, hedged, or pledged. They advise on Rule 144 volume limitations, Section 16 reporting obligations, 10b5-1 plan adoption and management, and insider trading compliance for all planned transactions. Securities counsel must be specifically involved whenever trust transfers involve company stock — gifts of insider-held shares to trusts have their own reporting and timing requirements.

Investment Advisor

Once assets are in trust or being diversified out of the concentrated position, an investment advisor manages the portfolio. The advisor must understand the tax constraints on the trust (particularly grantor trusts, where income flows to the grantor), the exchange fund's role in the overall allocation, and the interaction between hedging positions and the underlying stock ownership. Family office advisors or multi-family office platforms typically provide the best coordination for estates above $20 million.

Family Office or Coordination Layer ($50M+ Estates)

For executives with estates above $50 million — or concentrated positions of that magnitude — a family office or outsourced family office (OFO) becomes the essential coordination layer. The family office manages the interdependencies between the estate plan, investment management, tax compliance, insurance, and charitable planning, and provides ongoing monitoring of trust compliance, annual gift tax exclusions, and required distributions. The legal, tax, and investment advisors all work through the family office, ensuring coherence across an otherwise unwieldy set of moving parts.

Why DIY Is Dangerous Here

No area of personal financial planning is more consequential — or more irreversible — than concentrated stock estate planning. A missed QSBS transfer window cannot be undone. A GRAT structure that fails IRS scrutiny can pull assets back into the taxable estate. A Section 1259 constructive sale generates an eight-figure tax bill with no corresponding cash. The combination of multi-million-dollar stakes, hard tax deadlines, and the interaction of three overlapping legal regimes (estate tax, income tax, securities law) makes this uniquely unsuitable for self-direction. The professional fees for a properly implemented plan — typically $50,000–$250,000 for a complex engagement — represent an extraordinarily high-return investment relative to the tens of millions of dollars in tax exposure being addressed.

For a broader introduction to the trust structures referenced throughout this guide, see our Trusts Guide. For state-specific estate tax analysis, see our State Guides. To take a quick assessment of your own estate planning priorities, try our free estate planning quiz.

Frequently Asked Questions