How Gifting Startup Stock to Your Kids Can Give Your Family More Than One $15 Million Tax-Free Exclusion

A founder approaching retirement has seen the software company she started at her kitchen table become an acquisition target. Her shares are qualified small business stock, and tax law lets her exclude a large share of the gain when she sells. Then her CPA tells her the catch: the exclusion has a cap for each person and each company, and her stake is worth far more than her cap.

Every dollar above that line is taxed. Her two adult children and three grandchildren own no shares at all. Families with startup wins use that gap to get a second, third and fourth exclusion.

What the QSBS Break Is

Qualified small business stock, or QSBS, is stock bought directly from a domestic C corporation when the company issues it, provided the company passes size and active-business tests (26 U.S.C. 1202(c), (d) and (e)). Taxpayers other than corporations can leave gain on its sale out of gross income. The holding period, meaning how long the shares are owned, sets the size of the break. For stock acquired after the applicable date, the excluded share is 50% after 3 years, 75% after 4 years and 100% after 5 years or more (26 U.S.C. 1202(a)(1)(B) and (a)(5)).

Old Stock vs. New Stock Under the One Big Beautiful Bill Act

The One Big Beautiful Bill Act was signed July 4, 2025, and the statute uses that enactment date as the “applicable date.” The law split QSBS into two categories.

• Holding period: new stock gets its first exclusion at 3 years. Old stock still has to be held more than 5 years.
• Per-company cap: $15,000,000 for stock acquired after the applicable date, compared with $10,000,000 for stock acquired on or before it (26 U.S.C. 1202(b)(4)).
• Inflation: the $15,000,000 amount is indexed for taxable years beginning after 2026 (26 U.S.C. 1202(b)(5)).
• Company size: the gross assets limit for a qualified small business rose to $75,000,000 from $50,000,000 for stock issued after July 4, 2025 (26 U.S.C. 1202(d)(1)).

Each Taxpayer Gets One Cap Per Company

The tax-free gain from any one company is limited to the greater of two amounts: the applicable dollar limit, or 10 times the total adjusted basis of the shares sold that year (26 U.S.C. 1202(b)(1)). Basis is generally what the holder paid for the shares. A founder who bought in for pennies gets almost nothing from the basis test, so the dollar cap is the limit that applies.

Gift Rule That Keeps the Clock Running

Someone who receives QSBS as a gift or at death is treated as having acquired the stock the same way the donor did. They are also treated as having owned it for the giver’s holding period (26 U.S.C. 1202(h)(1) and (h)(2)). The child steps into the parent’s shoes. A grandson who receives shares his grandmother has held for four years starts at year four, and the holding period does not restart.

Old Stock Stays Old Stock

The same-manner rule cuts both ways. Shares the founder acquired on or before July 4, 2025 most likely stay under the old rules after a gift, because the recipient is treated as acquiring them the way she did. Under that reading, the child takes on the more than 5 years holding requirement and the $10,000,000 cap on those shares. Families plan around that conservative reading.

Gift Early, When Shares Are Cheap

The annual exclusion is the amount a person can give each recipient every year without using up any lifetime exemption. For tax year 2026, it is $19,000 per recipient (IRS inflation adjustment announcement). Gifts are valued on the date they are made. Early-stage shares usually carry low valuations, so a founder can move a meaningful block of stock within that exclusion, or use only a small amount of lifetime exemption. The same shares given away the month before an acquisition are worth far more on the gift tax return.

Every Child and Grandchild Gets a Separate Cap

The section 1202(b) limit applies per taxpayer and per company, so each child or grandchild who receives QSBS has a separate cap on that company. Estate planners use this on purpose. If a founder gives new stock to three children before a sale, she and each child can each exclude up to $15,000,000 of gain. That result comes from how the statute is written. Planners apply it by design.

Watch-Outs Before Transferring Shares

• A married person filing a separate return gets half the cap. On a joint return, excluded gain is split equally between the spouses for later years (26 U.S.C. 1202(b)(3)).
• The company has to remain a qualified small business and meet the active business requirement (26 U.S.C. 1202(e)(1)).
• If gain on new stock goes over the dollar limit in any year, the limit for later years drops to zero, regardless of inflation increases (26 U.S.C. 1202(b)(5)(B)).
• Do not assume the 10 times basis test carries over with a gift. Plan around the dollar cap.

What Families Do Before a Sale

1. Pull every stock certificate and grant agreement to confirm whether each block was acquired before or after July 4, 2025.
2. Ask the company’s counsel for written confirmation of C corporation status and gross assets when the shares were issued.
3. Get an independent assessment on the date of the gift, and report gifts to the IRS for any recipient whose gifts total more than $19,000.
4. Have an estate tax lawyer and CPA review the filing status of each recipient before any shares change hands.

By itself, QSBS gives one founder one exclusion for each company. Section 1202(h) carries the holding period and the stock’s status to each family member who receives shares as a gift, and each of them gets a separate cap. The number to remember for new stock is $15,000,000 per person, per company. Coordinating the gifts with the rest of the estate paperwork, beneficiary forms, trust titling, account registrations, is where most of these plans actually succeed or fail, and the full checklist appears in a free estate guide.

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