Stock Options and Estate Planning: Transferring Equity to Heirs

Planning for What You Hope Never Happens

Estate planning for stock options is not just for the wealthy — it is relevant for any startup employee whose equity might be worth a significant amount. Stock options have unique characteristics that create both opportunities and complications in estate planning: they expire, they may be non-transferable, they have different tax treatment depending on type, and their value can change dramatically. Without proper planning, your heirs could lose the value of options that expire before they can act, face unnecessary tax burdens, or miss out on favorable QSBS treatment.

What Happens to Stock Options at Death

Vested NSOs

Non-qualified stock options typically pass to your estate or designated beneficiary upon death. The executor or beneficiary inherits the right to exercise the options during the remaining term (the specific post-death exercise period is defined in your option agreement — often 12 months after death, though it varies).

Tax treatment: When NSOs are inherited and exercised by the beneficiary, the spread at exercise is income in respect of a decedent (IRD). This means:

• The spread is taxed as ordinary income to the beneficiary (not the estate)
• There is no step-up in basis for NSOs — the spread is fully taxable
• However, the beneficiary may claim an estate tax deduction for any estate tax attributable to the IRD amount (Section 691(c) deduction)

Vested ISOs

ISOs lose their ISO status upon the death of the option holder. When an ISO holder dies, the options become NSOs. This means:

• The favorable qualifying disposition treatment (long-term capital gains on the full spread) is no longer available
• The spread at exercise by the estate or beneficiary is ordinary income
• The AMT preference for ISOs no longer applies (since they are now NSOs)

This conversion is one reason to consider exercising ISOs during your lifetime — especially if you can hold for qualifying disposition treatment or QSBS.

Unvested Options

Unvested options typically do not pass to heirs — they are forfeited upon death unless the equity plan provides otherwise. Some plans include provisions for accelerated vesting upon death, giving the estate the right to exercise all options. Check your specific plan and option agreement.

Already-Exercised Shares

Shares that you have already exercised receive a step-up in basis at death under current law. This means:

• Your heirs inherit the shares at the FMV on the date of your death (or the alternate valuation date)
• All unrealized capital gains from exercise to death are eliminated
• The heirs can sell the shares immediately with zero capital gains tax (on the appreciation during your lifetime)

This step-up in basis is one of the most powerful estate planning tools in the tax code. It creates a strong incentive to exercise options during your lifetime and hold the shares — the appreciation escapes income tax entirely if held until death.

QSBS and Estate Planning

QSBS Passes to Heirs

Qualified small business stock (QSBS) can be inherited, and the QSBS exclusion carries over to the heir. If you hold QSBS that has met the five-year holding period, your heirs inherit the stock with its QSBS status intact. They can sell and exclude up to $15 million (or 10× adjusted basis) in gains — the same exclusion you would have received.

Holding Period Tacking

For QSBS inherited at death, the heir's holding period includes the decedent's holding period. If you held QSBS for four years before death, the heir only needs to hold for one additional year to meet the five-year requirement.

Step-Up and QSBS Interaction

At death, the QSBS receives a step-up in basis. However, the QSBS exclusion under Section 1202 takes priority — if the stock qualifies for the full exclusion, the gain is excluded from income entirely, making the step-up irrelevant for tax purposes. The step-up becomes relevant only if the gain exceeds the $15 million exclusion cap.

Gifting Stock Options and Shares

Gifting NSOs

Some stock option plans allow the transfer (gift) of vested NSOs to family members or trusts. When you gift NSOs:

• No gift tax is owed until the value of the gift exceeds the annual exclusion ($19,000 per recipient in 2025) or your lifetime exemption ($13.99 million in 2025)
• The recipient is taxed on the spread at exercise (ordinary income) — not you
• This can be useful for shifting income to family members in lower tax brackets

Gifting ISOs: Not Possible

ISOs cannot be transferred (except at death). Any attempt to gift ISOs during your lifetime converts them to NSOs and may violate the plan terms.

Gifting Exercised Shares

You can gift exercised shares to family members or trusts. The recipient takes your cost basis (carryover basis) and holding period. If the shares have appreciated significantly, gifting to a family member in a lower bracket can reduce the total tax on the gain.

For QSBS shares, gifting carries over the QSBS status and holding period. The recipient can claim the Section 1202 exclusion — each donee gets their own $15 million exclusion per issuer, potentially multiplying the tax benefit across family members.

Gift Tax Considerations

Gifts of stock are subject to gift tax rules:

• Annual exclusion: $19,000 per recipient per year (2025)
• Lifetime exemption: $13.99 million (2025) — amounts above the annual exclusion reduce your lifetime exemption
• Valuation: The gift is valued at FMV on the date of the gift. For private company shares, this requires a valuation — and a DLOM may apply, reducing the gift's value for gift tax purposes

Estate Planning Structures

Grantor Retained Annuity Trust (GRAT)

A GRAT allows you to transfer appreciated stock to a trust while retaining an annuity payment. If the stock appreciates faster than the IRS assumed rate (the Section 7520 rate), the excess passes to your beneficiaries tax-free. GRATs are particularly effective for pre-IPO stock that is expected to appreciate significantly.

Intentionally Defective Grantor Trust (IDGT)

An IDGT allows you to sell stock to a trust in exchange for a promissory note, removing the stock from your estate while the trust's income is taxed to you (as the grantor). If the stock appreciates, the growth occurs outside your estate.

Family Limited Partnership (FLP)

Transferring stock to an FLP allows you to maintain control while gifting limited partnership interests to family members at discounted values (valuation discounts for lack of control and marketability).

Practical Steps for Startup Employees

Step 1: Review Your Plan Documents

Check whether your stock option plan allows transfer at death and what the post-death exercise period is. Some plans give the estate only 90 days; others give 12 months or the remainder of the original term.

Step 2: Consider Exercising During Your Lifetime

Exercising options and holding shares provides two benefits: (1) shares receive a step-up in basis at death (eliminating capital gains), and (2) exercised QSBS can pass to heirs with the exclusion intact. Unexercised ISOs convert to NSOs at death, losing their favorable treatment.

Step 3: Update Your Estate Plan

If you hold significant equity compensation, work with an estate planning attorney to:

• Ensure your will or trust addresses stock options and equity
• Designate beneficiaries for transferable options (if the plan allows)
• Consider gifting strategies (for NSOs and exercised shares)
• Establish trusts if appropriate (GRATs, IDGTs)

Step 4: Communicate With Your Executor

Your executor or trustee needs to know about your stock options — including the number, type, exercise price, vesting schedule, and post-death exercise window. Provide them with a written summary and access to your equity plan administrator.

The Bottom Line

Stock options add complexity to estate planning, but the stakes justify the effort. Exercising options during your lifetime and holding shares until death provides the most favorable tax outcome for your heirs (step-up in basis, QSBS carryover). For those with large option grants, gifting strategies and trust structures can multiply the tax benefits. The worst outcome is options that expire unexercised because an executor did not know they existed or did not act within the post-death exercise window. Plan ahead, document everything, and ensure your estate plan accounts for your equity compensation.