QSBS Section 1202: $10 Million Tax-Free for Founders Explained

For US founders raising venture capital, Section 1202 is the single biggest reason to incorporate as a Delaware C-corp from day one. It can convert what would be a multi-million-dollar capital gains tax bill at exit into zero federal tax — quite literally one of the most generous tax provisions in the entire Internal Revenue Code.

This guide explains exactly what qualifies, how the 5-year hold works, and the traps to avoid.

What QSBS Section 1202 does

When you sell stock that meets all the QSBS tests, you can exclude from federal tax the GREATER of:

• $10 million per taxpayer per company, or
• 10× your aggregate adjusted basis in the stock

Whichever is bigger.

That gain is also exempt from the 3.8% Net Investment Income Tax (NIIT) and the Alternative Minimum Tax (AMT) — not just regular capital gains tax.

Worked example

Founder invests $200,000 to incorporate a Delaware C-corp and acquire 1,000,000 shares at $0.20/share. After 7 years of building the business, they sell their entire stake for $25,000,000.

Without QSBS:

• Gain: $25,000,000 − $200,000 = $24,800,000
• Federal capital gains tax (20% top rate + 3.8% NIIT): ~$5,902,000
• State tax (varies — California 13.3%): ~$3,300,000
• Total tax: ~$9,200,000

With QSBS:

• 10× basis exclusion = 10 × $200,000 = $2,000,000 — too small
• $10m exclusion applies instead
• Excluded gain: $10,000,000
• Taxable gain: $24,800,000 − $10,000,000 = $14,800,000
• Federal cap gains + NIIT on remaining: ~$3,522,000
• State tax on full gain (CA doesn't conform): ~$3,300,000
• Total tax: ~$6,822,000
• Federal saving: ~$2,380,000 (or much more with high-basis QSBS)

For founders with $1m+ basis, the 10× rule can multiply the exclusion massively. A founder with $10m of cumulative qualifying basis can exclude up to $100m of gain.

The 6 eligibility tests

Stock must satisfy all six tests to qualify as QSBS:

1. Domestic C-corporation

The issuer must be a US C-corp at the time of issuance and substantially throughout your holding period. LLCs, S-corps, partnerships, foreign entities — none qualify.

If your business is an LLC and you later convert to C-corp, the QSBS clock starts at conversion, not at original LLC formation. Plan ahead.

2. Original issuance

You must acquire the stock directly from the corporation in exchange for cash, services or other property — NOT in a secondary purchase from another shareholder. Founder shares typically qualify; secondary purchases on a tender offer or in a 409A grant do not.

Stock-for-stock acquisitions (e.g., a corporation acquires another corporation by issuing its shares) can preserve QSBS status if structured as a Section 351/368 exchange — get specialist advice.

3. Aggregate gross assets ≤ $50m

The corporation's aggregate gross assets must be $50m or less immediately after the stock is issued AND must have been $50m or less at all times before issuance. Once a corporation hits $50m total assets, all subsequent stock issued is non-QSBS.

This is one of the most common ways founders disqualify late-stage employees. Issue equity early — it's both more valuable to recipients (low strike price) and more likely to qualify.

4. Active trade or business

The corporation must use 80%+ of its assets in the active conduct of a qualifying trade or business. Holding cash or passive investments doesn't count.

Excluded businesses (don't qualify regardless):

• Health, law, accounting, actuarial, performing arts, athletics, financial services, brokerage, consulting (where the principal asset is the reputation/skill of one or more employees)
• Banking, insurance, financing, leasing, investing
• Farming
• Production or extraction of products eligible for percentage depletion (mining, oil & gas)
• Hotels, motels, restaurants

The "consulting" exclusion is broad and catches many service businesses. Tech / software / SaaS companies generally qualify; pure consulting practices generally don't.

5. 5-year holding period

You must hold the stock for at least 5 years before sale. Sell at 4 years, 11 months → no QSBS exclusion.

You can roll QSBS gain into other QSBS via Section 1045 if you sell after 6 months but before 5 years and reinvest in another QSBS within 60 days.

6. Section 1202(c)(3) redemptions

The corporation cannot have made certain "significant redemptions" of stock in the period around your issuance. This catches founder buyouts and certain employee buyback structures. Specialist review is essential before any redemption.

State conformity — the trap

Section 1202 is a federal provision. States individually decide whether to conform.

A California founder selling QSBS owes California's full 13.3% top rate on the entire gain — California saves nothing. Founders in zero-income-tax states (Texas, Florida, Wyoming, etc.) get the federal benefit cleanly.

If you're planning a major QSBS-eligible exit, the state where you live at the moment of sale matters. Some founders move to a no-tax state ahead of an anticipated liquidity event.

How to plan for QSBS

From day one

• Incorporate as a Delaware C-corp (LLC isn't eligible)
• Issue founder shares early at low strike price (preserve $50m gross assets test for as long as possible)
• Document the 80% active business test — board minutes, business plan, etc.
• Track issuance date for each shareholder — basis and 5-year clock starts then

Through the life of the company

• Avoid significant redemptions without specialist review
• Keep 80% of assets in the active trade (don't park large amounts in passive investments)
• Document everything — IRS audits QSBS claims and burden of proof is on the taxpayer

Approaching exit

• Confirm 5-year hold for each shareholder's shares — different shareholders have different clocks
• Get a QSBS opinion letter from your accountant before the sale
• Consider stacking — gifting QSBS to family members can multiply the $10m exclusion (each recipient has their own $10m cap)
• State residency planning if relevant

Common mistakes

• Forming as LLC and converting later — the 5-year clock and the gross asset test reset at conversion. If the LLC has appreciated significantly, the conversion itself can disqualify QSBS.
• Hitting $50m gross assets early without realising new equity issuances no longer qualify — late-hire stock options can be worthless from a tax perspective.
• Selling before 5 years thinking "I'll just pay the tax." Section 1045 rollover is your friend — reinvest into other QSBS within 60 days.
• Ignoring state conformity — California taxes hit your QSBS exit in full.
• Issuing too late — an early employee with $50,000 strike on $5m FMV stock won't have meaningful QSBS basis even if shares qualify.
• Triggering significant redemptions — a founder buyout structured wrong can disqualify subsequent QSBS for everyone.

QSBS stacking — the advanced play

Each US individual has their own $10m exclusion cap. By gifting QSBS to other family members (subject to gift tax limits and basis carryover), you can multiply the household exclusion:

• Founder + spouse: $20m combined
• Plus 3 adult children: $50m combined
• Plus non-grantor trusts for children: $80m+ combined

This is sophisticated planning requiring early action — the stock must be gifted before significant appreciation (otherwise gift tax becomes the binding constraint). Talk to a tax attorney with QSBS expertise.

How AccountsOS helps with QSBS

AccountsOS tracks the foundational data points needed for QSBS:

• C-corp formation date and ongoing C-corp status
• Aggregate gross assets at each stock issuance
• Issuance date and basis for each shareholder
• 5-year holding period clock
• Active vs passive asset ratio
• Flag for excluded businesses

When sale time approaches, the data is ready for your tax attorney's QSBS opinion letter. AccountsOS does NOT issue QSBS opinions itself — this is specialist territory and the sums involved warrant a tax attorney's review.

Try AccountsOS free or read about AccountsOS in the United States.

Related reading

• C-corp vs S-corp vs LLC: how to choose
• Self-employment tax explained
• S-corp election: when does it pay off?
• Quarterly estimated tax: avoiding the underpayment penalty