Section 1202 / Qualified Small Business Stock (QSBS)

If you work at a startup and hold stock, there is a provision in the tax code that could let you exclude a significant amount of capital gains from federal income tax. It is called Section 1202, and the stock that qualifies is known as qualified small business stock, or QSBS.

The potential savings are large enough that it is worth understanding whether your shares might qualify, even if the rules are specific and the eligibility is not guaranteed.

What QSBS is

Section 1202 of the Internal Revenue Code provides an exclusion from federal capital gains tax on the sale of qualified small business stock. The provision was designed to encourage investment in small businesses by rewarding shareholders who buy in early and hold for the long term.

In practical terms, if your shares meet all the requirements, you may be able to sell them and pay zero federal capital gains tax on a substantial portion of the profit. For stock acquired after September 27, 2010, the exclusion can be 100% of the eligible gain.

This is not a deferral. It is a full exclusion. The gain simply does not count as taxable income for federal purposes.

The potential benefit

The exclusion is capped at the greater of:

• $10 million in cumulative gain from stock in a single company, or
• 10 times your adjusted basis in the stock

For most startup employees, the $10 million cap is the binding constraint. But for founders or very early employees who invested significant capital, the 10x basis rule can sometimes provide a larger exclusion.

At the current top federal long-term capital gains rate of 20%, plus the 3.8% net investment income tax, a $10 million exclusion could save roughly $2.38 million in federal tax. That is a meaningful number even by Silicon Valley standards.

Qualification requirements

QSBS eligibility has several conditions, and all of them must be met. Here are the key ones:

The company must be a C-corporation

LLCs, S-corps, and partnerships do not qualify. The company must be a domestic C-corp at the time the stock is issued and for substantially all of the holding period.

Gross assets must be $50 million or less at issuance

At the time your stock was issued (or immediately after), the corporation's aggregate gross assets cannot exceed $50 million. Gross assets include cash received from the stock issuance itself. This means early-stage startups usually qualify, but companies that have raised very large rounds may not.

You must hold the stock for at least five years

The five-year clock starts on the date you acquire the shares, not the date of your option grant or vesting date. For employees who exercise options, the clock starts on the exercise date.

You must acquire the stock at original issuance

QSBS must be obtained directly from the company in exchange for money, property, or services. If you buy shares on a secondary market from another shareholder, those shares generally do not qualify.

The company must be in an active trade or business

At least 80% of the company's assets must be used in the active conduct of a qualified business. Certain industries are excluded, including financial services, law, engineering, consulting, hospitality, and farming. Most technology and software companies qualify, but it is worth checking.

Why it matters for startup employees

QSBS is not just a founder perk. Employees who hold stock in qualifying companies can benefit too, particularly in these situations:

Exercising ISOs into QSBS-eligible shares

When you exercise incentive stock options, you acquire actual shares of the company. If the company is a qualifying C-corp and meets the asset test at the time of exercise, those shares may be QSBS. The five-year clock starts at exercise, so early exercise can be advantageous if the company qualifies.

Early exercise with an 83(b) election

Some employees early-exercise unvested options and file an 83(b) election within 30 days. This starts both the capital gains holding period and the QSBS five-year clock as early as possible. If the company eventually has a large exit more than five years later, this strategy can be powerful. But it requires paying for shares that might never be worth anything, so there is real risk involved.

Restricted stock grants

Founders and very early employees who receive restricted stock directly from the company can also start the QSBS clock with an 83(b) election at the grant date, provided the company meets the requirements at that time.

A worked example

Say you join a Series A startup in 2021 and exercise 50,000 ISOs at a strike price of $1.00 per share. You pay $50,000 out of pocket. The company is a C-corp with $30 million in gross assets at the time.

In 2027, six years later, the company is acquired. Your shares are worth $40 per share, so your total proceeds are $2,000,000. Your gain is $1,950,000.

Because you held for more than five years, the company was a qualifying C-corp under $50 million in gross assets at issuance, and you acquired at original issuance through exercise, the entire $1,950,000 gain may be excluded from federal capital gains tax under Section 1202.

Without the QSBS exclusion, you might owe roughly $463,000 in federal tax on that gain (at 23.8%). With QSBS, that federal bill could be $0.

Your state tax bill, however, depends on where you live.

Common gotchas

Not all startups are C-corps

Some startups begin as LLCs and later convert to C-corps. Stock issued before the conversion is not QSBS. Only shares issued after the company is a C-corp can qualify.

LLC-to-C-corp conversions can reset the clock

If a company converts from an LLC to a C-corp, any shares you held in the LLC do not carry over their holding period for QSBS purposes. Your five-year clock starts when new C-corp shares are issued to you.

The $50 million test is at the time of issuance

The company can grow well past $50 million in assets after your shares are issued. What matters is the company's gross assets at the moment your specific shares were issued. This is good news for employees who join early but can be a problem for later hires at heavily funded companies.

Secondary sales may not qualify

If you buy shares from another employee or investor on a secondary market, those shares were not acquired at original issuance from the company. They generally do not qualify as QSBS. Some structured transactions may preserve QSBS status, but you need expert guidance.

Stock received for services has specific rules

Stock issued as compensation can qualify as QSBS, but the details matter. Options that convert to shares through exercise generally work. RSUs are more complicated because the shares are technically issued at settlement, and the company's asset size at that later date is what counts.

The holding period is strict

Five years means five years from the date of acquisition. There is no shortcut. If your company is acquired at four years and eleven months, you do not get the exclusion (though Section 1045 may allow a rollover in some situations if you reinvest within 60 days into another QSBS).

QSBS and AMT

Here is an important interaction that catches people off guard: even though the QSBS exclusion eliminates regular federal capital gains tax on qualifying sales, the relationship with the alternative minimum tax has changed over time.

For stock acquired after September 27, 2010, the 100% QSBS exclusion is also excluded from AMT. This is a significant improvement over earlier versions of the rule, where a portion of the excluded gain was added back as an AMT preference item.

However, the exercise of ISOs can still trigger AMT in the year you exercise, regardless of QSBS status. The AMT issue at exercise and the QSBS exclusion at sale are two separate events. You might owe AMT in the year you exercise your options, even if you eventually pay no federal capital gains tax when you sell the shares years later.

This means QSBS does not make early ISO exercise risk-free from a tax perspective. You still need to model the AMT impact of exercising.

State tax nuances

The QSBS exclusion is a federal provision. States can choose whether to follow it, and many do not.

California does not recognize the QSBS exclusion

This is the single most important state-level fact for startup employees. California taxes capital gains as ordinary income, and it does not conform to Section 1202. If you live in California, you will owe state tax on the full gain even if the federal gain is excluded. At California's top rate of 13.3%, this can still be a substantial bill.

States that generally follow the federal exclusion

New York, Texas (no state income tax), Washington (no state income tax on capital gains from QSBS sales), Florida, and several other states either conform to the federal QSBS exclusion or have no state income tax. But rules change, so verify the current law in your state.

Some states partially conform

A few states allow a partial exclusion or have their own version of the QSBS benefit with different thresholds. Do not assume your state follows the federal rule without checking.

Practical steps to check eligibility

If you think your shares might qualify, here is what to do:

• Confirm the company is a C-corp. Check your stock purchase agreement or ask your company's legal or finance team. If the company started as an LLC, find out when it converted.
• Ask about gross assets at the time of your stock issuance. The company should be able to confirm whether its aggregate gross assets were under $50 million when your shares were issued. You can request a QSBS eligibility letter.
• Check the business type. Make sure the company is in a qualifying industry. Most tech startups pass this test, but if the company is primarily in financial services, consulting, or another excluded category, it may not.
• Document your acquisition date. For exercised options, this is the exercise date. For restricted stock with an 83(b) election, it is the grant date. Keep records of the exact date and the amount you paid.
• Track your basis. Your cost basis is usually the exercise price times the number of shares, plus any amounts already recognized as income. You need this to calculate your gain and the 10x basis cap.
• Talk to a tax advisor. QSBS eligibility involves multiple overlapping requirements. A qualified CPA or tax attorney can review your specific situation and help you plan around the five-year holding period.

Final takeaway

Section 1202 is one of the most valuable tax provisions available to startup shareholders, but it is not automatic. The company must qualify, the stock must be acquired the right way, and you must hold for at least five years. For employees at early-stage C-corps, the potential to exclude up to $10 million in federal capital gains makes it worth understanding and planning around, even if a liquidity event is years away.

The biggest mistake is not knowing about it until after a sale happens. The second biggest mistake is assuming you qualify without verifying the details.

Related guides

• Incentive Stock Options (ISOs)
• Capital Gains Tax on Startup Shares
• Alternative Minimum Tax (AMT)
• What Is Equity?

Sources and further reading

• 26 U.S.C. Section 1202: https://www.law.cornell.edu/uscode/text/26/1202
• IRS guidance on qualified small business stock: https://www.irs.gov/publications/p550
• Section 1045 rollover provision: https://www.law.cornell.edu/uscode/text/26/1045