Austin Tech Startup QSBS: How Section 1202 Lets Founders Sell Tax-Free Up to $10 Million
What QSBS actually is and why founders care
Qualified Small Business Stock is a specific kind of equity defined by Section 1202 of the Internal Revenue Code. The benefit is straightforward in theory. If you acquire stock at original issuance from a domestic C-corporation, hold it for at least five years, and the company meets the active business and gross-asset tests, you can exclude federal capital gains tax on the greater of $10 million or 10 times your adjusted basis. For most founders, the $10 million cap is the relevant number. For founders who put real cash into the company, the 10x basis figure can blow past the $10 million floor in a meaningful way.
The exclusion is per taxpayer, per issuer. That second part matters more than people realize. A husband and wife each get their own $10 million cap on the same company’s stock if they each own qualifying shares. A child who receives gifted QSBS gets their own cap too. We will cover the stacking mechanics later, but the point is that the headline $10 million is a floor for a single founder, not a ceiling for the household.
The reason founders care is the math. A standard long-term capital gains rate on a $10 million startup exit runs 20% federal plus 3.8% net investment income tax, plus state tax wherever the founder lives. For a Texas resident, that’s roughly $2.38 million in federal tax on a fully taxable sale. QSBS reduces that to zero. The Texas piece adds another layer because there is no state capital gains tax to begin with, so the savings stack cleanly.
The five rules every Austin founder needs to memorize
First, the company has to be a domestic C-corporation at the time the stock is issued and substantially throughout the holding period. LLCs do not qualify. S-corps do not qualify. Foreign entities do not qualify. If you started as an LLC and converted to a C-corp later, your QSBS clock starts at the conversion date, not the original formation date. We see this trip up Austin founders constantly, especially when the original LLC structure ran for two or three years before a venture round forced the C-corp conversion.
Second, the company’s gross assets must have been $50 million or less immediately before and immediately after the stock was issued. Gross assets means total cash plus the adjusted basis of all property the company owns, not market value. A startup that raised a $40 million Series B and held the cash on the balance sheet at the moment of issuance can still qualify if the math works out. But the moment gross assets cross $50 million at any issuance, all future stock issued is permanently disqualified. The previously issued QSBS keeps its status, but new grants after that point are out.
Third, the company has to be an active business in a qualified trade. Software, hardware, climate-tech, biotech, manufacturing, and most product companies qualify. Disqualified trades include health, law, engineering, architecture, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage, banking, insurance, farming, mineral extraction, and hospitality (hotels, restaurants). That list cuts deep. A health-tech company that primarily provides health services to patients is out. A health-tech company that builds software sold to hospitals is in. The line matters, and we have seen Austin medical-software founders structure their go-to-market specifically to stay on the right side of it. Fourth, the founder must acquire the stock at original issuance, meaning directly from the company in exchange for money, property, or services. Stock bought from another shareholder on the secondary market does not qualify. Fifth, the five-year hold runs from the date of issuance, not grant date and not vesting date. If your equity is restricted stock that vests over four years, the QSBS clock starts when the shares were issued (typically at the original grant, assuming an 83(b) election was filed within 30 days). Without the 83(b), the clock starts at each vesting tranche, which usually kills the strategy for the unvested portion.
Why Texas makes QSBS genuinely 0% at the state level
Most QSBS articles online were written for California, New York, or Massachusetts founders. Those states either tax QSBS gains in full at ordinary state rates (California treats QSBS gain as fully taxable for state purposes) or follow federal treatment with modifications. Texas does neither, because Texas does not have an individual income tax at all. There is nothing to tax. The federal exclusion under Section 1202 is the entire story for a Texas resident.
This changes the calculus on where to live during the five-year hold and especially in the year of sale. We have worked with founders who relocated from California to Austin specifically to time a QSBS exit. Done right (genuine domicile change, severed California ties, documented Texas residency through driver’s license, voter registration, primary residence, and business location), the move can save 13.3% of the state-taxable portion of any non-excluded gain. For a founder with $25 million of total gain ($10 million excluded, $15 million taxable), the California state tax bill on the excess would be roughly $2 million. In Texas, it’s zero.
California pursues residency disputes aggressively, particularly for founders who appear to leave just before a liquidity event. The Franchise Tax Board has audit programs specifically targeting this pattern. The fix is to make the move real and to make it early. We tell founders considering a Texas relocation for QSBS reasons that the move should happen at least 18 to 24 months before any expected liquidity event, and the documentation trail (lease, utility bills, vehicle registration, doctor changes, kids enrolled in Texas schools) should be unambiguous. We help with the planning side. The Texas part is straightforward once you’re here. The California exit is the hard part.
Stacking the exclusion across family members
The $10 million cap is per taxpayer, per issuer, which means a founder can multiply the exclusion by gifting QSBS to family members before the sale. A gift of QSBS to a spouse, child, grandchild, or even a non-grantor trust transfers the QSBS character along with the holding period. The recipient steps into the founder’s shoes for purposes of the five-year hold and gets their own separate $10 million exclusion.
The mechanics work like this. A founder with $40 million of QSBS that is about to be sold for $50 million gifts $10 million worth of shares to each of three children and keeps $10 million for themselves. Assuming basis is small, each of the four taxpayers (founder plus three children) can exclude up to $10 million of gain. The total exclusion is now $40 million instead of $10 million. The remaining $10 million of gain is taxed normally.
Two important caveats. First, gifts above the annual exclusion ($19,000 per recipient in 2026, doubled to $38,000 for married couples splitting gifts) use up lifetime gift and estate tax exemption. The current federal exemption is roughly $13.99 million per person in 2026, so most founders can do significant stacking without owing gift tax, but it does eat into the exemption available at death. Second, gifting to a non-grantor trust requires the trust to be structured carefully. The IRS has not been kind to aggressive stacking strategies where the trusts are clearly shams. We recommend setting up these structures with an estate attorney well before any sale is contemplated. We coordinate with the attorney on the tax side and handle the gift tax return filing (Form 709) the year after the gift.
The five mistakes that kill QSBS treatment
Mistake one: starting as an LLC and converting late. The conversion resets the five-year clock. A startup that ran as an LLC for two years and then converted to a C-corp at the Series A needs another five years from the conversion date before any of the converted equity qualifies for QSBS. We have seen founders sell at year four post-conversion, expecting QSBS treatment, and find out at tax time that none of the gain qualified. Mistake two: missing the 83(b) election. Without it, the QSBS clock starts at vesting, not grant. For founders with four-year vests, that means the last tranche doesn’t hit five years until year nine.
Mistake three: secondary tender offers that look like primary issuance but aren’t. Some companies do structured secondary transactions where existing shareholders sell to new investors. If a founder sells QSBS to a new investor as part of the tender, the founder gets cap-gains treatment on that piece (potentially with QSBS exclusion if the five-year hold is met), but the new investor does not get QSBS because they bought on the secondary, not at original issuance. We see founders confuse this. The new investor’s hold period is irrelevant to QSBS status because the stock never qualified in their hands.
Mistake four: redemptions inside the disallowed windows. If the company redeems more than 5% of its stock by value in the two-year window before or after stock is issued, that issuance is disqualified from QSBS. Founder buybacks during early-stage cleanups can blow this up. Mistake five: assuming all the gain qualifies when basis is high. The exclusion is the greater of $10 million or 10x basis. If a founder put $2 million of cash into the company at incorporation, the basis is $2 million and the 10x figure is $20 million. That’s the cap. But if the founder later sells $30 million worth of stock, the excess $10 million above the $20 million 10x basis is fully taxable. People forget the cap is a cap, not a deduction floor.
What we do for Austin tech founders at each stage
At formation, we work with founders and their corporate counsel to make sure the entity is a C-corp from day one if QSBS is on the roadmap, and that 83(b) elections are filed for any restricted stock within the 30-day window. We document gross assets at the time of each stock issuance so the $50 million test is verifiable at exit. We also flag any planned activities that might cross into disqualified-trade territory, which matters most for health, finance, and consulting-adjacent startups.
Through the hold period, we track the five-year clock for each stock issuance, monitor gross-asset levels around each financing event, and review any planned redemptions for the 5%/two-year disqualification trap. For Austin founders relocating from California or New York, we coordinate the residency change so the state-tax savings on the non-excluded portion of the eventual exit are defensible. We also handle annual K-1s, W-2s, and 1099s related to the company.
At exit, we prepare the federal return including Schedule D and Form 8949 with the QSBS exclusion claimed on the appropriate line. We document the qualification (formation date, gross assets at issuance, active business test, hold period) in the return file and in our work papers. If the IRS questions the exclusion (which happens occasionally for large amounts), we have the file ready. Most Austin founders we work with treat this as an event that pays for years of planning fees in a single transaction. The math is hard to argue with.
Frequently Asked Questions
What qualifies as QSBS for an Austin tech startup and what disqualifies it?
Qualified Small Business Stock under IRC Section 1202 has five core requirements that all have to be met at the right times. The company must be a domestic C-corporation at the moment of stock issuance and substantially throughout the founder’s holding period. The company’s gross assets must have been $50 million or less immediately before and immediately after the stock was issued. The company must be engaged in a qualified active trade or business (most software, hardware, biotech, climate-tech, and manufacturing qualifies). The founder must acquire the stock at original issuance from the company itself in exchange for money, property, or services. And the founder must hold the stock for at least five years before sale.
The disqualifications are where most Austin founders get tripped up. The big one is entity structure. If your startup was formed as an LLC and converted to a C-corp at some later point (typically because a venture investor required it), the five-year QSBS clock starts at the conversion date. The years spent as an LLC do not count. We see this constantly in Austin’s SaaS scene, where founders bootstrap as LLCs for the pass-through tax benefits and then convert when they raise institutional capital. By the time they sell three or four years later, they think they have a seven-year-old company, but for QSBS purposes the clock has only been running for two or three.
The active trade or business test is the second big trap. Section 1202 excludes a long list of services-heavy industries: health services, law, engineering, architecture, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage, banking, insurance, farming, mineral extraction, and hospitality. A digital health startup that primarily provides health services to patients does not qualify. A digital health startup that builds software licensed to hospitals does qualify. The IRS looks at where the revenue actually comes from. We have helped Austin medical-software founders structure their revenue model specifically to keep the company on the right side of this line, including separating professional services from product revenue and licensing the platform rather than bundling clinical work with it.
Gross assets matter at every issuance. If the company’s total cash plus adjusted basis of property crosses $50 million at any point right before or right after stock is issued, that issuance and every future issuance is disqualified. The previously issued QSBS keeps its character, but new shares do not. We have seen Austin startups raise a $60 million Series B and accidentally disqualify all subsequent option grants and refresher grants because gross assets jumped over $50 million the moment the round closed. Founders who got their shares at formation are fine, but employees who joined post-Series B do not have QSBS stock.
The original-issuance rule means stock bought on the secondary market never qualifies, no matter how long the new holder keeps it. This is a common point of confusion in tender offers. When a company runs a structured secondary where existing shareholders sell to new investors, the new investors do not get QSBS treatment on their purchased shares. The selling shareholders may still get QSBS exclusion on their gain if they had QSBS to begin with, but the buyer’s stock is not QSBS in their hands.
The 83(b) election is another disqualifier in disguise. For founders with restricted stock that vests over time, the QSBS clock starts at vesting unless an 83(b) election was filed within 30 days of the original grant. Miss the 30-day window and your QSBS clock for the unvested portion starts at each vesting date. For a four-year vest, the last tranche doesn’t hit five years until year nine. We coordinate the 83(b) filing at the time of grant for every founder client.
An example. An Austin SaaS founder we work with formed her company as an LLC in 2021, converted to a Delaware C-corp in early 2023 when a seed round closed, and is now considering a 2027 exit. Her QSBS clock started in early 2023, so she would hit the five-year mark in early 2028. Selling in 2027 means she would owe full federal capital gains on the entire exit. We are advising her to delay the sale by six months to clear the five-year mark, which on her projected $15 million exit saves roughly $2.4 million in federal tax. The state piece is already zero because she lives in Austin.
Documentation matters at exit. The IRS does not pre-approve QSBS status. The founder claims the exclusion on Schedule D and Form 8949 at the time of sale, and the company should provide a written representation that the stock qualifies. We help our Austin tech clients build a QSBS file from the formation date forward: incorporation documents, gross-asset records at each issuance, qualified trade analysis, and 83(b) election copies. If the IRS audits the exclusion (which they sometimes do for larger amounts), the file is what defends the position.
Where we add value: structuring the entity correctly at formation, monitoring qualification through each financing event, filing 83(b) elections on time, coordinating residency planning for relocating founders, building the QSBS documentation file, and preparing the exit return with the exclusion properly claimed. Founders who try to figure this out themselves at exit usually discover at least one disqualifying issue. By then, it’s too late to fix.
How does Texas's no-state-income-tax status make QSBS more valuable for Austin founders?
Texas has no individual income tax, which means there is nothing to add on top of the federal tax on a startup exit. For an Austin founder selling QSBS that qualifies for the full federal exclusion, the total tax bill on up to $10 million of gain is zero. Federal is zero because of Section 1202. State is zero because Texas has no state-level income tax at all.
Compare that to other major startup hubs. A California founder selling the same stock would face California’s treatment of QSBS, which has historically been less generous than federal. California does not conform to the federal QSBS exclusion in the same way, meaning the gain that’s excluded for federal purposes can still be partially or fully taxable for California purposes depending on the year and the company’s facts. At California’s top rate of 13.3%, that’s potentially $1.33 million of state tax on a $10 million gain that’s federally excluded. The Texas resident pays zero.
New York is similar. New York taxes capital gains at ordinary income rates, which top out at roughly 10.9% for state, plus an additional 3.876% for New York City residents. A founder selling $10 million of QSBS while living in Manhattan could face state and city tax exceeding $1.4 million even when the federal piece is fully excluded. Texas avoids all of that.
The stacking effect on a larger exit is even more pronounced. Consider an Austin founder selling $30 million of stock. Federal QSBS covers $10 million (assuming basis is small). The remaining $20 million is taxed federally at 20% long-term capital gains plus 3.8% net investment income tax, for about $4.76 million of federal tax. State tax: zero. Total tax bill: roughly $4.76 million on a $30 million sale, or about 15.9% effective. A California founder with the same exit pays the federal tax plus 13.3% on the full $30 million (because California doesn’t conform fully), adding roughly $3.99 million on top. The Austin founder keeps an extra $4 million.
This is why we see founders relocating from California and New York to Austin specifically to time a liquidity event. The math is too clean to ignore. But the move has to be real. California’s Franchise Tax Board aggressively audits residency changes that happen suspiciously close to a major income event. They look for continuing California ties: real estate, family members still in state, business connections, club memberships, doctor’s appointments, vehicle registration. A founder who leaves California in October and sells in December is going to face a residency audit.
We tell relocating founders that the move should happen at least 18 to 24 months before any expected exit. The documentation trail needs to be unambiguous: Texas driver’s license, voter registration, primary residence in Texas, vehicles registered in Texas, kids in Texas schools, primary care doctor in Texas, severed California real estate or rental arrangements that don’t look like a place to return to. We coordinate with a residency-savvy attorney for the California exit and handle the Texas tax-planning side. The combined work pays for itself many times over on the eventual exit.
A real example. We worked with a founder who left San Francisco for Austin in early 2024, sold her stake in a fintech company in late 2026 for $18 million, and qualified for the full $10 million QSBS exclusion. Total federal tax on the remaining $8 million: roughly $1.9 million. Total state tax: zero. If she had stayed in California, the state would have taxed the entire $18 million at 13.3%, adding roughly $2.4 million on top. The move saved her $2.4 million.
Where Texas does have a corporate-level tax is the franchise tax, also called the margin tax, which applies to most businesses operating in the state. For a C-corp startup, the margin tax is calculated on gross receipts above a threshold (about $2.47 million for 2026), so most early-stage startups owe nothing or very little. The franchise tax does not affect the personal QSBS calculation. It hits at the company level on operating revenue, not the founder’s stock sale.
Documentation matters here too. We keep records of every Texas residency-establishing fact: lease or deed, driver’s license issuance date, voter registration, vehicle registration, doctor visits, kids’ school enrollment, gym memberships, primary bank accounts opened in Texas. If California ever challenges the move, the file is what wins the audit.
Where we help: coordinating the relocation timing so the move clears any look-back period before the exit, structuring the residency change so it’s audit-defensible, handling the dual-state final-year return in California (with the appropriate sourcing of pre-move income), and preparing the federal QSBS exit return. For founders who are already in Austin and have been for years, the work is simpler because the residency is already established. The savings on a large exit are the same either way.
Can early employees of an Austin startup claim QSBS, or just the founders?
Yes, early employees can claim QSBS, but only on stock they actually own at original issuance and only if they hold for five years from the date of issuance. The rules don’t distinguish between founders and employees. They distinguish between original issuance and secondary purchase. Anyone who receives stock directly from the company in exchange for services (i.e., a restricted stock grant or an exercised stock option) potentially has QSBS, as long as the company met the gross-asset test at the time of issuance and is otherwise qualified.
Stock options are the trickiest part. An option itself is not stock. You can hold an option for ten years and the QSBS clock has not started. The clock starts when you exercise the option and actually receive the stock. For an employee who joined an Austin SaaS startup in 2022 with a four-year vesting option grant, the QSBS clock for each tranche of exercised shares starts at the exercise date, not the grant date and not the vest date. If the employee exercises in 2025, the five-year hold runs through 2030. Selling earlier than that means full federal capital gains on the sale.
This creates an interesting planning question: should you early-exercise your options? Early exercise (combined with a timely 83(b) election) starts the QSBS clock immediately at the early-exercise date, even though the shares are still subject to vesting. The downside is that you have to come up with the exercise price in cash, you risk losing the money if the company fails, and you may owe alternative minimum tax on the spread if the options are ISOs. The upside is that the QSBS clock starts five years earlier than it would if you waited until vesting and exercised conventionally.
For an Austin engineer with a $10,000 strike price and 100,000 shares of an ISO grant at a $0.10 fair market value, early exercise costs $10,000 in cash and (because strike equals FMV at grant) generates no AMT. If the company sells five years later at $50 per share, the engineer’s $5 million of gain qualifies for QSBS exclusion. If the engineer had waited until vesting and exercised at, say, $5 FMV at year four, they would owe AMT on the spread at exercise plus a fresh five-year QSBS clock starting at exercise. The math favors early exercise in most cases for early employees who can afford the cash.
The gross-asset test matters a lot for later employees. If you joined the company after a Series B that pushed gross assets above $50 million, your options (when exercised) do not produce QSBS stock. The qualification window closed at the moment of that financing event. We have seen Austin employees who exercised options at companies that had crossed the threshold years earlier, expecting QSBS treatment, and we have had to deliver the bad news that no exclusion applies. The fix would have been to know before exercising whether the company still qualified.
Companies are not required to tell employees whether the stock qualifies as QSBS, but most well-advised startups will provide a representation letter to employees who request it. We recommend that Austin tech employees ask for written confirmation of QSBS qualification before exercising any options where the exclusion is part of the financial planning. The letter should state the company’s status as a domestic C-corp, the gross-asset figure at the time of issuance, and confirmation that the company is engaged in a qualified active trade or business.
Real example. An early engineer at an Austin climate-tech startup joined in 2020 with a 50,000-share ISO grant at a $0.05 strike. He early-exercised in 2020 for $2,500 cash and filed his 83(b) election within 30 days. The company sold in 2025 for $80 per share. His $4 million of gain on those 50,000 shares qualified for the full federal QSBS exclusion. Total federal tax: zero. State tax: zero (Texas resident). The $2,500 he risked at early exercise paid off enormously.
Documentation: copies of the option grant agreement, the exercise notice, the early-exercise stock purchase agreement, the filed 83(b) election (with proof of mailing within 30 days), the company’s QSBS representation letter, and the gross-asset documentation at the time of issuance. We help our Austin engineering clients build this file from day one of employment.
Where we help: walking employees through the early-exercise decision (cost-benefit, AMT analysis, QSBS qualification check), filing the 83(b) election on time, requesting and storing the company’s QSBS representation, modeling the exit tax projection under different sale-year scenarios, and preparing the exit return with the exclusion claimed correctly. Early-stage employees who plan this well can capture six- and seven-figure tax savings on a successful exit. Employees who don’t plan it usually pay full freight on the same exit.
What's the 5-year hold rule for QSBS and how does it work for Austin founders selling at exit?
The five-year hold under Section 1202 means the founder must have held the stock continuously for at least five years before the sale to claim any QSBS exclusion. The clock starts on the date the stock is issued to the founder and runs through the date of sale. Anything less than five years means zero exclusion. The rule is binary. Four years, eleven months, and twenty-nine days qualifies for nothing. Five years and one day qualifies for the full exclusion (up to the cap).
The start date is the issuance date, which for restricted stock grants is the date stated on the stock purchase agreement, and for option exercises is the date the shares are actually delivered after exercise. For a founder who incorporated her company on March 15, 2021 and was issued founder stock the same day, the five-year mark is March 15, 2026. Selling on March 14, 2026 means no exclusion. Selling on March 15, 2026 or later means full exclusion (subject to the cap).
The clock can be tacked. If the founder dies and the stock passes to an heir, the heir’s holding period includes the decedent’s. If the founder gifts QSBS to a family member, the recipient’s holding period also tacks. If the founder contributes QSBS to a partnership, the partnership’s hold period also includes the founder’s. These tacking rules let founders plan around the five-year mark when an exit window opens before the original founder has hit five years.
The big planning question is what to do if the five-year mark hasn’t been reached when an acquisition offer comes in. The first option is to negotiate a closing date that pushes past the five-year mark. We have helped Austin founders renegotiate exit timing on multiple occasions, including a 2024 deal where the acquirer agreed to push the close from month 58 to month 61 because the founder demonstrated the additional tax cost without the wait. The acquirer cared about the founder’s net proceeds because the founder was rolling part of the deal into equity in the new company and would not have signed at a worse number.
The second option is Section 1045 rollover. If the founder has held the stock for at least six months but less than five years and sells it, the founder can defer the gain by rolling the proceeds into new QSBS within 60 days. The new QSBS’s holding period tacks onto the original, so the founder picks up the original holding period for purposes of the five-year test on the replacement stock. This is more useful for founders who want to roll proceeds into a new startup than for founders who want to cash out.
The third option is to accept the loss of QSBS treatment and proceed with the sale. For some founders, the timing pressure from the acquirer or the market opportunity outweighs the tax savings. We model the after-tax proceeds at several different close dates so the founder can make an informed decision. For a $20 million exit where $10 million would qualify for QSBS, the difference between selling in month 59 versus month 61 is roughly $2 million of federal tax. That’s not always enough to justify the wait, but it usually is.
Real example. An Austin developer-tools founder we work with received an acquisition offer in late 2025 when he was four years and ten months past his QSBS issuance date. The deal was for $14 million in cash and stock. His basis was minimal, so the full $10 million federal QSBS exclusion would apply if he could push closing past the five-year mark. We modeled it: closing at month 59 meant $2.38 million of federal tax on the first $10 million plus $952,000 on the remaining $4 million, for $3.33 million total. Closing at month 61 meant $0 on the first $10 million plus $952,000 on the remaining $4 million, for $952,000 total. The difference was $2.38 million. The acquirer agreed to a 75-day delay in exchange for an earnout adjustment. The founder netted an extra $2.38 million.
Documentation for the hold period is straightforward: the stock purchase agreement showing the issuance date, the 83(b) election (if applicable) showing the timely filing, and the sale documents showing the closing date. We keep all of this in the QSBS file for each founder client from formation through exit. If the IRS audits the exclusion later, the issuance and sale dates are the first things they verify.
Where we help: tracking the five-year clock for each founder’s stock from issuance forward, modeling the after-tax difference at various close dates, advising on whether to negotiate a closing delay or accept the loss of QSBS, structuring 1045 rollovers when applicable, and preparing the exit return with the exclusion (or rollover deferral) properly claimed on Schedule D and Form 8949. Most Austin founders who hit the five-year mark with intentional planning save seven figures of tax. Founders who don’t plan it generally find out at exit that something disqualified them.
Can QSBS be stacked or gifted to increase the exclusion?
Yes, and stacking is one of the most powerful planning moves available to Austin tech founders with large expected exits. The $10 million exclusion is per taxpayer, per issuer. A founder can multiply the total exclusion by gifting QSBS to family members or non-grantor trusts before the sale, with each recipient receiving their own separate $10 million cap.
The mechanics are straightforward. Before the sale, the founder gifts shares of QSBS to family members. The gift transfers the QSBS character of the stock to the recipient along with the holding period (so a gift of stock that’s been held for three years gives the recipient a stock with three years of QSBS clock already accumulated). When the company is sold, each recipient claims their own exclusion on their portion of the gain, up to $10 million each. A founder who gifts $10 million worth of QSBS to a spouse and $10 million each to two children potentially excludes $40 million total ($10 million each, four taxpayers) instead of $10 million.
The recipient can be a spouse, child, grandchild, sibling, parent, or non-grantor trust. Spousal gifts don’t even use lifetime gift tax exemption because of the unlimited marital deduction. Gifts to others above the annual exclusion ($19,000 per recipient in 2026, doubled to $38,000 for married couples splitting gifts) use lifetime exemption ($13.99 million per person in 2026). For most stacking strategies involving large gifts to children, the founder will use a chunk of their lifetime exemption and file Form 709 to report the gift the following year.
Non-grantor trusts are where stacking gets most aggressive. A founder can set up multiple non-grantor trusts (typically with different beneficiaries) and gift QSBS to each. Each trust is a separate taxpayer for purposes of the $10 million cap. Some founders set up trusts for each child plus trusts for grandchildren, creating five or six separate $10 million exclusions in addition to the founder’s own. The total exclusion can run into the tens of millions.
The IRS has not been welcoming to overly aggressive stacking. The Service has indicated through informal guidance and audit positions that non-grantor trusts set up purely to multiply the QSBS exclusion can be challenged under various anti-abuse theories. The key defenses are real economic substance: the trusts should have legitimate non-tax purposes (asset protection, estate planning, providing for beneficiaries), the trustees should be independent, the trust terms should be normal, and the trusts should be established well before any sale is contemplated. Trusts set up the week before closing are a red flag.
Real example. We worked with an Austin enterprise-software founder who set up two non-grantor trusts for his two children in 2022, gifted them QSBS during 2023 (when the stock had a low valuation), and the company sold in 2026 for $35 million. Each trust held shares that produced $10 million of gain, each excluded fully under QSBS. The founder’s own remaining shares produced $15 million of gain, $10 million of which he excluded personally, with the remaining $5 million taxable. Total excluded: $30 million. Total federal tax: roughly $1.19 million on the taxable $5 million. State tax: zero (Texas). Without stacking, his federal tax would have been roughly $5.95 million.
Timing matters. Gifts of low-value early-stage stock are much more efficient than gifts of high-value pre-exit stock. A founder who gifts $1 million of stock that later appreciates to $10 million transfers $10 million of QSBS exclusion at a gift tax cost of $1 million of lifetime exemption used. The same gift made right before a sale uses $10 million of exemption. We tell Austin founders to think about stacking early, ideally during the first year or two after the C-corp is formed, when stock valuations are low and the exemption cost is minimal.
There are also estate-planning benefits beyond QSBS stacking. Putting stock in trusts removes it from the founder’s taxable estate at death. If the founder is in the 40% federal estate tax bracket on amounts above the exemption, gifting $10 million of low-basis stock into a trust today removes $10 million plus future appreciation from the estate, potentially saving millions in eventual estate tax in addition to the QSBS exclusion.
Documentation is critical. The gift requires a properly executed stock transfer, a contemporaneous gift tax return (Form 709) for the year the gift is made, a valuation of the gifted shares at the time of the gift, and (for trust gifts) a properly drafted trust agreement with an independent trustee. We coordinate with the estate attorney on the trust drafting and handle the gift tax return filing. The valuation typically comes from a third-party valuation firm, especially for shares without recent priced rounds to anchor the value.
Where we help: identifying which family members or trusts make sense for stacking based on the founder’s situation, coordinating with an estate attorney on trust formation and trust selection, modeling the federal exclusion math under different stacking scenarios, handling the gift tax return filing the year after each gift, and preparing the exit return for each recipient when the sale occurs. Stacking done well can save Austin tech founders eight figures of federal tax on a large exit. Stacking done poorly (or done too late) can fail to clear IRS scrutiny. We see both outcomes every year.
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