How to Pay $0 Federal Tax on a $15 Million Business Sale (QSBS Explained)

Qualified small business stock, usually shortened to QSBS, can let you sell stock in a qualifying company and pay zero federal capital gains tax on up to $15 million of gain, and sometimes more. The rule sits in Section 1202 of the Internal Revenue Code.

This article covers what QSBS is, who can use it, the holding period, the qualification rules, and a few examples with numbers.

What is QSBS (qualified small business stock)?

Congress wrote the rule in 1993 to encourage investment in small businesses. If you buy stock in a qualifying small company and hold it long enough, you can exclude a chunk of the gain from federal capital gains tax when you sell. The exclusion started at 50%, went to 100% for stock acquired after September 27, 2010, and was expanded again by the One Big Beautiful Bill Act in July 2025.

The cap is the greater of $15 million or 10 times your adjusted basis in the stock, per company. For context, the top federal long term capital gains rate is 20%, and high earners pay the 3.8% Net Investment Income Tax on top, so a normal stock sale faces 23.8%, or about $3,570,000 on a $15 million gain. The 100% exclusion is also exempt from the Net Investment Income Tax and is not a preference item for the Alternative Minimum Tax.

Who can use the QSBS exclusion?

QSBS is available to individuals, trusts, estates, and pass through entities like S corps and partnerships. Founders, early employees with stock options or restricted stock, and angel investors are all potentially eligible. C corporations cannot claim the exclusion on stock they hold in another company.

QSBS holding period: the 3, 4, and 5 year tiers

For stock acquired on or before July 4, 2025, you had to hold for at least 5 years to get any exclusion at all. For stock acquired after that date, Congress added a tiered system:

• 3 years: you exclude 50% of the gain.
• 4 years: you exclude 75%.
• 5 years or more: you get the full 100%.

If you sell before 5 years, Section 1045 lets you roll the proceeds into another QSBS investment within 60 days. Your holding period carries over, so you can keep deferring and eventually qualify.

QSBS qualification requirements

You have to meet every one of these tests:

1. Domestic C corporation. The company has to be a C corp formed in the United States on the day you acquire your stock. If an LLC or S corp converts later, your holding period and basis for QSBS purposes generally start from the conversion date.
2. Gross assets test. When the stock is issued and immediately after, the company's gross assets have to be under $75 million. Gross assets include cash, so a giant funding round can push a startup past the number fast.
3. Original issuance. You have to acquire the stock directly from the company for money, property other than stock, or services. Founder shares, restricted stock, and options you exercise qualify, with the clock on options starting at the exercise date. Shares bought from another shareholder do not.
4. Active business test. At least 80% of the company's assets, by value, have to be used in the active conduct of a qualified trade or business, substantially throughout your holding period.
5. Qualified trade or business. Excluded categories include health, law, engineering, accounting, consulting, financial services, banking, insurance, investing, farming, mining, oil and gas extraction, and hospitality businesses like hotels and restaurants.

The simple rule: if the business is mainly people selling their expertise, or it is in finance, hospitality, or natural resources, QSBS probably does not apply. Tech, software, manufacturing, consumer products, and product based biotech often qualify.

The wrong entity type, the wrong issuance date, the wrong kind of business, or a poorly timed stock buyback can make the benefit disappear. I would not try to do this without a qualified tax advisor and an attorney who knows Section 1202.

QSBS examples with real numbers

• The founder. Sarah puts $100,000 into her C corporation, and it is acquired 7 years later for a gain of $11.9 million. That is under her $15 million cap, so the full gain is excluded. Without QSBS, federal tax would be about $2,832,200.
• The angel investor. Priya invests $500,000 in a seed round and 6 years later has a $20 million gain. The first $15 million is excluded and the remaining $5 million is taxed normally, so her federal tax is $1,190,000 compared with $4,760,000 without QSBS.
• The 4 year exit. A founder invests $200,000 and sells in year 4 with a $10 million gain. Under the tiered rule she excludes 75% and saves $1,785,000.

Common questions

How long do you have to hold QSBS?

For stock acquired after July 4, 2025, holding 3 years gets a 50% exclusion, 4 years gets 75%, and 5 years or more gets 100%.

Does an LLC or S corp qualify for QSBS?

No. The company has to be a domestic C corporation on the day you acquire your stock.

Can a trust hold QSBS?

Yes. An advanced planning move called QSBS stacking has founders gift shares into non grantor trusts before a sale to multiply the $15 million cap across multiple taxpayers.

VDB Wealth is a registered investment adviser. Information presented is for educational purposes only and is not intended to make an offer or solicitation for the sale or purchase of any specific securities, investments, or investment strategies. Investments involve risk and, unless otherwise stated, are not guaranteed. Past performance is not indicative of future performance.

What if I told you that you could sell your business for $15 million and pay zero federal capital gains tax on the entire profit?

Not a loophole. Not an aggressive strategy.

A specific section of the tax code, written by Congress, signed into law, and expanded in July of 2025.

It's called QSBS, short for Qualified Small Business Stock.

And if you are a founder, an early employee, an angel investor, or anyone planning to start or back a business, the way you set things up today can mean the difference between writing a multimillion dollar check to the IRS or keeping that money for your family.

Most people have never heard of it.

The ones who have are quietly using it to keep millions of dollars they would have otherwise lost to taxes.

In the next 15 minutes, I'm going to walk you through four things.

One, what QSBS actually is.

Two, how it works for small businesses, startups, and investors.

Three, the qualification rules you have to meet.

And four, a few real examples with real numbers, so you can see what this looks like in practice.

I'm Andy VandenBerg, founder of VDB Wealth.

I work with business owners, founders, and high earners on the tax and planning decisions that compound into serious money over time.

And my goal is to make this stuff understandable so you can actually act on it.

OK, let's start at the top.

QSBS stands for Qualified Small Business Stock. It lives in Section 1202 of the Internal Revenue Code.

Here's the basic idea.

Back in 1993, Congress decided it wanted to encourage Americans to invest in small businesses.

So they wrote a rule that said: if you buy stock in a qualifying small company and hold it long enough, when you eventually sell, you can exclude a chunk of the gain from federal capital gains tax.

Originally, the exclusion was 50%.

In 2010, Congress bumped it up to 100% for stock acquired after September 27 of that year.

And then in July of 2025, the One Big Beautiful Bill Act expanded the rules again, which we'll talk about in a minute.

Translation: if you qualify, you can sell your stock for a massive gain and pay zero federal tax on a meaningful piece of that gain.

Up to the greater of $15 million, or 10 times what you originally invested. Per company.

To put that in context, the top federal long term capital gains rate is 20%.

Add the 3.8% Net Investment Income Tax that high earners pay on top of that, and you're looking at 23.8% federal tax on a normal stock sale.

So on a $15 million gain, that's about $3,570,000 in federal tax.

QSBS can wipe that out.

And here's one more thing that surprises people.

The 100% QSBS exclusion isn't just exempt from regular capital gains tax. It's also exempt from the 3.8% Net Investment Income Tax, and it is not a preference item for the Alternative Minimum Tax.

So it really is zero federal tax on the excluded portion of the gain.

So how does this actually work in real life? Let's break it down.

First, who can use QSBS?

It's available to individuals, trusts, estates, and pass through entities like S corps and partnerships.

So if you're a founder who owns shares in your startup, an early employee who got stock options or restricted stock, or an angel investor who wrote a check, you're all potentially eligible.

The one group that can't use it is C corporations. C corps cannot claim the Section 1202 exclusion on stock they hold in another company.

Second, how do you actually claim it?

You acquire stock from a qualifying company, you hold it for the required period, you sell it, and on your tax return for the year of the sale, you exclude the qualifying portion of the gain.

Your CPA reports it on Form 8949 and Schedule D.

Third, and this is the big change from July of 2025: the holding period.

For stock acquired on or before July 4 of 2025, the rule was simple. You had to hold for at least five years to get any exclusion at all. Less than five years, no benefit. Period.

For stock acquired after July 4 of 2025, Congress added a tiered system.

Hold for three years, and you exclude 50% of the gain. Hold for four years, and you exclude 75%. Hold for five years or more, and you get the full 100%.

That tiered system is a big deal.

Before this change, an acquisition at year three or year four wiped out your QSBS benefit entirely. Now, you still capture most of it.

Fourth, the cap on how much gain you can exclude.

The cap is the greater of two numbers: $15 million, or 10 times your adjusted basis in the stock.

So if you invested $2 million and the stock turns into a $50 million gain, 10 times your basis is $20 million. That's greater than $15 million, so your cap is $20 million.

Anything above the cap is taxed normally.

And one more concept worth knowing.

If you sell QSBS stock before you have held it for five years and you don't want to pay tax on the gain, there is a provision called Section 1045 that lets you roll the proceeds into another QSBS investment within 60 days.

Your holding period carries over. So you can keep deferring and eventually qualify for the exclusion.

Serial founders and angel investors use this a lot.

OK, this is the part where I have to slow down, because the qualification rules are where deals win or lose. You have to nail every one of these.

Test one: the company has to be a domestic C corporation.

Not an LLC. Not an S corp. Not a partnership. A C corp, formed in the United States.

And it has to be a C corp on the day you acquire your stock.

A lot of founders set up as LLCs or S corps to avoid double taxation early on, and then convert to a C corp later. That conversion matters for QSBS.

Your holding period and your basis for QSBS purposes generally start from the conversion date, not from when you originally founded the LLC.

Test two: the gross assets test.

At the time the stock is issued and immediately after, the company's gross assets have to be under $75 million.

That cap was $50 million for stock issued on or before July 4 of 2025. It is $75 million for stock issued after July 4 of 2025, and it will adjust for inflation starting in 2027.

Important detail: gross assets includes cash. So when a startup raises a giant round, it can blow past this number fast.

If your stock is issued before the company crosses the threshold, you're fine. If it's issued after, you're out.

Test three: original issuance.

You have to acquire the stock directly from the company in exchange for money, property other than stock, or services.

Founder shares qualify. Stock options that you exercise qualify, with the QSBS clock starting on the exercise date. Restricted stock qualifies.

What does not qualify is buying shares on a secondary market from another shareholder.

So if you buy your friend's startup shares from her in a private sale, those shares lose their QSBS status in your hands.

Test four: the active business test.

At least 80% of the company's assets, by value, have to be used in the active conduct of a qualified trade or business. And this has to be true substantially throughout your holding period.

Translation: the company has to actually be operating a business, not sitting on a pile of cash or holding passive investments.

Test five: the qualified trade or business rule.

The business cannot be in certain excluded categories. And this list catches a lot of people by surprise.

The excluded categories include health, law, engineering, architecture, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage services, banking, insurance, financing, leasing, investing, farming, oil and gas extraction, mining, and hospitality businesses like hotels, motels, and restaurants.

It also excludes any trade where the principal asset is the reputation or skill of one or more employees.

That's a long list.

The simple rule is this:

If your business is mainly people selling their expertise, or it is in finance, hospitality, or natural resources, QSBS probably does not apply.

Tech, software, manufacturing, consumer products, and product based biotech often qualify.

A couple of other landmines are worth knowing.

If the company buys back stock from you or from related parties within certain windows around your issuance, it can disqualify your shares. Watch out for redemptions.

And one more.

C corporations themselves cannot hold QSBS to get the exclusion, but trusts can.

There's an advanced planning move called QSBS stacking, where founders gift shares into non grantor trusts before a sale to multiply the $15 million cap across multiple taxpayers.

That's a whole other video.

Alright, let's make this real. Three scenarios, plus a bonus.

Example one: the founder.

Sarah starts a software company in 2026. She and her cofounder form a Delaware C corporation on day one. Sarah puts in $100,000 for her founder stock.

Seven years go by. The company grows, gets acquired in 2033, and Sarah's stake is worth $12 million.

Her gain is $11,900,000.

She held for more than five years, so 100% of the gain is eligible for exclusion.

Her per company cap is the greater of $15 million or 10 times her basis. Ten times $100,000 is $1 million. So her cap is $15 million.

Her $11.9 million gain is comfortably under the cap.

Federal tax on $11.9 million of gain, without QSBS, at the 23.8% rate, would be about $2,832,200.

With QSBS, her federal tax on that gain is zero.

Sarah saves $2,832,200.

Example two: the early employee.

Marcus joins a startup in 2027 as employee number eight. He gets 50,000 incentive stock options at a strike price of 10 cents per share.

He exercises early, when the fair market value still equals the strike. Total cash out the door: $5,000.

Six years later, the company gets acquired. His shares are worth $3 million.

His gain is $2,995,000.

He held for more than five years from his exercise date. The company qualified all along. He gets the full 100% exclusion.

Without QSBS, his federal tax would be about $712,810. With QSBS, zero.

Marcus saves $712,810.

Example three: the angel investor with a giant exit.

Priya writes a $500,000 check into a friend's seed round in 2026. The company explodes.

Six years later, they get acquired, and Priya's stake is worth $20.5 million.

Her gain is $20 million.

Her per company cap is the greater of $15 million or 10 times her basis. Ten times $500,000 is $5 million. So her cap is $15 million.

The first $15 million of her gain is excluded. The remaining $5 million is taxed normally.

Federal tax with no QSBS would be $20 million times 23.8%, or $4,760,000.

Federal tax with QSBS would apply only to $5 million, which at 23.8% is $1,190,000.

Net savings: $3,570,000.

Priya saves $3,570,000.

Bonus example: the four year exit under the new tiered rule.

A founder invests $200,000 in a C corp formed in 2026. In year four, the company gets a strong offer and accepts.

Her shares are worth $10.2 million. Her gain is $10 million.

Under the old rules, she would have gotten zero exclusion because she did not hit five years.

Under the new tiered rule, because she held for at least four years, she gets a 75% exclusion.

That means $7.5 million of her gain is excluded. The remaining $2.5 million is taxed at 23.8%, which is $595,000.

Without QSBS, the tax would have been $2,380,000.

So even on a four year exit, she saves $1,785,000.

That four year tier is one of the most underappreciated parts of the 2025 update.

Look, I know that was a lot. So here's what I want you to walk away with.

One: QSBS is one of the most powerful tax planning tools available to anyone building or backing a business.

If you are starting a company, joining one as an early employee, or investing in private companies, you should know whether your stock qualifies.

Two: the 2025 law changes made it bigger and faster.

The exclusion cap jumped from $10 million to $15 million per company. The gross assets ceiling went from $50 million to $75 million. And the new tiered holding period means even a four year exit can save you serious money.

Three: the rules are detailed and unforgiving.

The wrong entity type, the wrong issuance date, the wrong kind of business, or a poorly timed stock buyback can make the benefit disappear.

So don't try to do this without a qualified tax advisor and an attorney who actually knows Section 1202.

If you're wondering whether your stock qualifies, or you're setting up a company and want to make sure you do this right from day one, reach out.

You can find me at vdbwealth.com, or send an email to andy@vdbwealth.com.

I'm happy to answer questions and point you in the right direction.

If you got something out of this, hit subscribe and let me know in the comments what you would like me to cover next.

Thanks for watching, and I'll see you in the next one.