QSBS Explained: The $15M Exclusion, the 3-Year Rule, and California Tax

Tax-Saving Video Series · With Samy Basta, CPA

In this episode, Samy breaks down Qualified Small Business Stock (QSBS) in plain English: the six rules a founder’s stock has to pass, how the One Big Beautiful Bill Act made the exclusion bigger and faster for stock acquired after July 4, 2025, and why California founders still need a separate state-tax plan. He walks through a real estate tech founder who sells for a $20 million gain after three years, then closes with three things to do this week.

Jump to: Episode insights · The six rules · Worked example · About the speaker

Read the full episode transcript

Lightly edited for readability: speech-to-text errors corrected, wording unchanged. Bracketed notes are ours.

Listen, if you build a startup and one day you sell it, taxes can take a big bite. But here’s one rule that can make that bite way smaller on the federal side, sometimes even close to zero on a big chunk. The rule is called QSBS. And here’s a new twist. A new law called the One Big Beautiful Bill Act made QSBS stronger for new stock purchased after July 4th, 2025. It did three big upgrades. It raised the max tax-free cap for new stock from $10 million to $15 million. It made the small company limit bigger, from $50 million to $75 million in assets. And it added a step system so you can get some benefit sooner. You don’t have to wait five years to get the capital gain exclusion.

So, QSBS is like a golden ticket. If you earn the ticket early and you follow the rules, the government may not tax you on a big part of your profit when you sell.

Now, let’s make that simple, plain English.

Rule number one: your company must be a C corp. Not an LLC, not “I’ll switch later.” It has to be a C corp from the start. [Note: an LLC that converts to a C corporation can still qualify for stock issued at the conversion, but the years before it don’t count. See Rule 1 above.]

Rule number two: you must get the stock from the company itself, like founder shares or early employee shares, not buying shares from another person later.

Rule number three: the company must be small enough when the stock is given to you. With the new law, new stock can qualify with up to $75 million in assets instead of $50 million. That means more startups fit.

Rule number four: the company must be a real working business. A real product, a real service. Real estate tech can fit: property tools, data tools, smart home tech. But plain real estate investing usually doesn’t fit. So don’t assume. Always check early.

Rule number five: you must hold the stock long enough. This part actually got better with the new law. For new stock after July 4th, 2025, there’s a step system. If you hold the stock three years, you may exclude up to 50% of the allowed gain. If you hold it four years, you get up to a 75% exclusion. Hold it five years, and that’s the winning number: you may exclude up to 100% of your capital gain, up to the limit.

Rule number six: there is a cap. For new stock, up to $15 million of gain may be tax-free on the federal side. Still, that’s a huge number. Life-changing numbers.

Now, I’m going to be blunt. QSBS is not a do-it-later thing. It’s a do-it-early thing. If your setup is messy, this will fall apart. If your stock is not issued clean, that may disqualify you. If your records are trash, that can also fall apart. Why am I saying that? Because I see it all the time. Founders build fast. They sell, they raise money, they focus on clients. Love that. But they ignore the boring legal stuff. Then they get an offer to sell, and they find out the golden ticket is missing.

Let me give you a simple case study. Say you build a property management app, an AI app, a real estate tech company, one of these businesses that can qualify for QSBS. You set it up as a C corp on January 1st, 2026, and on that day the company gives you founder shares. Clean records, clean stock. You grind for three years. You grow, you get real clients, you build a real team. And on January 1st, 2029, a bigger company buys you. Let’s say your profit on the stock is $20 million.

Without QSBS, that profit can get hit with federal tax. A big check to the IRS, and that’s not fun. But with QSBS, if you qualify, you may be able to protect part of that gain from federal tax. And because of the new law, if your stock is the new kind, you might get a real break even at year three.

Here’s how this could look in plain English. The new cap is up to $15 million for new stock. At year three, the step system can allow a 50% exclusion, so up to $7.5 million of the gain could be tax-free on the federal side. At year four, it can be 75% of the cap. At year five, and that’s always the winning number, it can be a 100% exclusion of the capital gain up to that cap.

Is it always like that? No. Don’t be sloppy. There are rules. But that’s the big idea: the new law made QSBS bigger and faster for new stock.

Now the part nobody likes. This is federal. States are different. We live in California, and California often doesn’t play nice with QSBS. So yes, you might win big on the federal side, but California may still tax you on that gain. I know it’s annoying, but that’s the game.

So here’s what I want you to do this week, if you think you may qualify for QSBS. First, check what you are now. Are you structured as an LLC or a C corp? Don’t guess. Make sure you are a C corp. If you are, then you know you qualify. [Note: being a C corporation is the first test, not a guarantee. The stock still has to pass the other five rules.] Second, if you’re raising money soon, bring up QSBS before the round closes, not after. After, it’s too late. Third, clean up your equity stuff: your cap table, stock, approvals, the boring basics. This is what protects the win.

That’s it. QSBS is a golden ticket. But you don’t get it by luck. You get it by doing the boring legal steps early and planning for it.

I hope that was helpful. Thank you for spending time with me, and I hope to see you in the next episode. This has been another episode of our tax-saving video series. If you enjoyed this video, please like it, subscribe below, and share it with other business owners. You can find previous episodes and more information at bastacpa.com. Thanks for listening, and have a great day.

Episode Insights and Action Items

1. QSBS got bigger and faster for new stock.What’s happening: For stock acquired after July 4, 2025, the One Big Beautiful Bill Act raised the per-company gain cap from $10 million to $15 million, raised the company size limit from $50 million to $75 million in gross assets, and added a step-up schedule. The exclusion now starts at three years instead of being all-or-nothing at five.

2. It’s a golden ticket you earn at setup, not at the sale.What’s happening: Samy sees the same pattern constantly. Founders build fast, raise money, chase clients, and skip the boring legal work. Then an offer arrives and they discover messy structure, stock that wasn’t issued cleanly, or missing records. Any one of those can cost the exclusion.

3. Three years can now be worth millions.What’s happening: In Samy’s example, a real estate tech founder sells after three years with a $20 million gain. Under the new step system, up to $7.5 million of that gain could be excluded from federal tax. Hold to five years and up to the full $15 million cap could be excluded. See the math below.

4. California doesn’t follow the federal break.What’s happening: QSBS is a federal rule. California generally taxes the gain anyway, so a big federal win can still come with a meaningful state tax bill.

ACTION ITEMS

1. Confirm your entity type.Is the company an LLC, an S corporation, or a C corporation? Being a C corporation is the starting line, not a guarantee. The stock still has to pass the other five rules. Do you know what your company was on the day your shares were issued?

2. Raising money soon? Bring up QSBS before the round closes.A large raise can push the company over the $75 million gross-asset limit for stock issued after it. Has anyone modeled that for your next round?

3. Clean up your equity records.Cap table, stock issuances, board approvals. If a buyer asked for proof tomorrow, could you produce it?

The Six QSBS Rules, in Plain English

Samy covers six rules in the episode. Here is each one with the detail you will need before relying on it.

Rule 1: The Company Must Be a C Corporation

QSBS is tied to stock of a domestic C corporation. S corporation stock is not QSBS. An LLC membership interest is not QSBS stock. If a startup begins as an LLC and later converts to a C corporation, the conversion can potentially start a QSBS holding period for qualifying stock issued in the conversion, but the years spent holding the LLC interest do not simply become C-corporation QSBS years. In the episode, Samy puts it bluntly: not an LLC, not “I’ll switch later.” The conversion route exists, but it does not give you credit for the years before it.

That is why entity choice can have an exit-tax consequence. An LLC may be attractive for pass-through taxation, flexibility, or early losses. A C corporation may be better for venture financing, equity compensation, and potential QSBS treatment. Neither is automatically better. The right structure depends on the business model, funding plan, owners, state taxes, and expected exit path.

If QSBS could matter, document when the corporation became a C corporation and when each shareholder received stock. Do not rely on a cap table screenshot alone. Keep board approvals, subscription or purchase agreements, stock ledgers, valuation support, conversion documents, and proof of consideration. Years later, the shareholder may need those records to substantiate original issuance and acquisition date.

Rule 2: You Must Get the Stock Directly From the Company

QSBS generally applies only to stock you acquire at original issuance, meaning directly from the corporation in exchange for money, property other than stock, or services. Founder shares, shares issued to an investor in a funding round, and shares an employee receives from the company can fit. Buying shares from another shareholder generally does not.

For employees, stock from exercising a company-granted option is generally treated as acquired from the company when the option is exercised, so the exercise date, not the grant date, usually starts the clock.

There are limited exceptions. Stock received as a gift or through an inheritance can generally carry over the original holder’s QSBS status and holding period, and certain reorganizations can preserve it too. Those exceptions are technical, so get them reviewed rather than assumed.

This rule is why issuance paperwork matters. Keep the board approval, the stock purchase or subscription agreement, and proof of what was paid for each issuance. Those documents are how you show, years later, that the stock came straight from the company.

Rule 3: The Company Must Be Small Enough When the Stock Is Issued

The gross-asset test is measured around the time the stock is issued. Under the 2025 law, the federal aggregate gross-asset threshold increased from $50 million to $75 million for stock issued after July 4, 2025. The test looks at the corporation and applicable related entities under the Section 1202 rules. It is not simply annual revenue, valuation, or the amount of cash in the bank.

This is important for growing companies. A business can qualify when founder shares are issued and later grow far beyond the threshold. The key is whether the issuer satisfied the asset test when the relevant stock was issued. That makes historical balance sheets, contribution records, financing documents, and valuations important evidence.

Founders should not wait until a financing closes to ask whether a new stock issuance qualifies. A large capital raise can affect the gross-asset calculation immediately after issuance. Model the test before the transaction closes so the tax question is part of the financing process rather than a post-closing surprise.

Rule 4: The Company Must Run a Qualified Active Business

Not every C corporation business qualifies. Section 1202 excludes certain service and other businesses from the qualified-trade-or-business definition. The statute and IRS guidance identify fields such as health, law, engineering, architecture, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage services, banking, insurance, financing, investing, farming, certain extraction businesses, and operating hotels, motels, restaurants, or similar businesses.

That means a company being innovative or technology-enabled does not automatically make it qualified. A software product serving real estate companies may have a different analysis from a company whose principal business is real estate investing or a professional service whose value is primarily the skill or reputation of its professionals. Classification can be fact intensive.

During substantially all of the shareholder holding period, the corporation also needs to satisfy the active-business requirements. If the company pivots, holds excessive nonbusiness assets, acquires another business, or changes how it earns revenue, revisit the analysis. QSBS is not only an issue on the stock-issuance date.

Rule 5: The Holding Period Controls the Percentage

The 2025 law added a phased exclusion for certain stock acquired after July 4, 2025. That is a major change because qualifying shareholders may receive some Section 1202 benefit after three or four years rather than receiving no exclusion until the five-year mark. The exact eligible gain limit and other requirements still apply.

The holding period should therefore be tracked by specific stock lot. A founder may own shares issued on different dates. An employee may exercise options over several years. A financing may create new stock with a later acquisition date. Do not assume the company has one universal QSBS start date.

If an exit is being negotiated near a three-, four-, or five-year anniversary, timing can have a meaningful federal tax effect. That does not mean tax should control the transaction, but it should be modeled before signing. A buyer deadline, earnout, rollover, stock sale versus asset sale structure, or secondary transaction can change the result.

Holding period (stock acquired after July 4, 2025)	Potential federal exclusion
At least 3 years	50%
At least 4 years	75%
At least 5 years	100%

Rule 6: The Gain Limit Still Matters

For stock acquired after July 4, 2025, the 2025 law increased the per-issuer dollar limitation from $10 million to $15 million, subject to the Section 1202 rules and the alternative limitation based on basis. The headline number is large, but it is not a promise that every founder can exclude $15 million. The stock has to qualify, the shareholder has to be eligible, the holding period has to be met, and the gain calculation has to be performed correctly.

This is where transaction modeling matters. A $20 million gain does not automatically equal a $15 million exclusion. Multiple stock lots, prior dispositions, basis, gifting, trusts, entity ownership, and other planning can affect the computation. Bring tax counsel and the CPA into the transaction before the purchase agreement is final.

Worked Example: A Real Estate Tech Founder Sells After Three Years

This is the case study Samy walks through in the episode, with the federal math laid out.

A founder sets up a property management software company as a C corporation in January 2026 and receives founder shares from the company that day. Clean issuance, clean records. The founder builds for three years, lands real clients, and hires a real team. In early 2029, a larger company buys the business. The founder’s gain on the stock is $20 million.

Without QSBS, that full gain is exposed to federal capital gains tax. With QSBS, if every rule is met, part of it can be excluded, and the share grows with each year held.

Two things keep this honest. First, it assumes the stock passes all six rules and the founder’s basis in the shares is low; the cap is the greater of $15 million or 10 times basis, so it can be higher. Second, this is the federal side only. As a California resident, the founder should expect California to tax the gain.

Shares held	Federal exclusion on a $20M gain (up to the $15M cap)
3 years	50%: up to $7.5M excluded
4 years	75%: up to $11.25M excluded
5 years	100%: up to $15M excluded

California Founders Need a Separate State-Tax Model

California does not conform to the federal Section 1202 exclusion in the same way the federal government does. A founder can have a strong federal QSBS result and still face California tax on the gain. For a California resident, that state piece can be substantial enough that “tax-free exit” is the wrong way to describe the strategy.

The planning conversation should therefore show federal and California outcomes separately. It should also consider residency, sourcing, transaction structure, charitable planning, estate planning, and other facts without assuming that changing one fact automatically changes California taxation. State residency planning in particular is highly fact sensitive and should not be reduced to moving an address.

The best framing is simple: QSBS can be a major federal benefit, but a California founder needs a California model. That makes the advice more accurate and more useful than the broad promise that the exit will be tax free.

The QSBS File Every Founder Should Build Now

Articles of incorporation and evidence of C corporation status.

Founder stock purchase agreements, option-exercise records, and board approvals.

Cap table history showing issuance dates and transfers.

Historical balance sheets and support for the gross-asset test at issuance.

Financing documents and records of capital contributed.

Business descriptions, revenue mix, and support for the active-business test.

Records of redemptions, repurchases, reorganizations, or conversions.

Prior tax memos or CPA/legal analysis addressing Section 1202.

A stock-lot schedule showing acquisition dates and potential three-, four-, and five-year milestones.

ABOUT THE SPEAKER

Samy Basta, CPA

Founder, Basta & Company

Samy has over 25 years of experience in tax strategy, financial planning, and business advisory, with particular expertise in construction, architecture, and interior design. He hosts Basta & Company’s tax-saving video series, where he explains the rules California business owners actually run into, in plain English.

Bottom Line

QSBS can be worth millions, but the value comes from getting the structure and records right early. Confirm C corporation status, original issuance, the gross-asset test, qualified business activity, holding periods, and the gain limit before an exit is on the calendar. For California founders, model the state tax separately.

Before you raise the next round, convert an entity, issue founder stock, or sign an exit deal, review the QSBS file. Book a call with me and let’s discuss how California business owners like yourself can connect tax strategy to the financial decisions happening now – while there is still time to plan.

What does QSBS stand for?

QSBS means Qualified Small Business Stock. Section 1202 can allow eligible noncorporate shareholders to exclude part or all of qualifying gain when the statutory requirements are met.

Do I need to hold QSBS for five years?

For certain stock acquired after July 4, 2025, the federal rules provide phased exclusions beginning after three years, with 50 percent after three years, 75 percent after four, and 100 percent after five, subject to the rest of Section 1202.

Can LLC ownership qualify as QSBS?

An LLC interest itself is not QSBS stock. A later conversion or incorporation can potentially create qualifying C corporation stock, but the analysis and holding period should be reviewed carefully.

Does California exclude QSBS gain?

California generally does not conform to the federal Section 1202 exclusion, so California tax may still apply even when federal gain is excluded.

Should I wait until an exit to verify QSBS?

No. The strongest time to build the file is when stock is issued and while the company is operating. Historical asset tests, original issuance, and active-business facts are much easier to document contemporaneously.

If my company is a C corporation, does my stock automatically qualify?

No. C corporation status is only the first rule. The stock also has to be acquired at original issuance, the company has to pass the $75 million gross-asset test when the stock is issued, it has to run a qualified active business, and you have to meet the holding period. Each one needs its own check.

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