Comparison
QSBS vs Ordinary Capital Gains: Key Differences Explained
QSBS (Qualified Small Business Stock) is a tax exemption under IRC Section 1202 that allows eligible investors and founders to exclude up to $10M (or 10x their cost basis) in gains from federal taxes when selling qualified startup equity. Ordinary capital gains are taxed at 0–20% for long-term gains. QSBS can eliminate federal tax entirely on qualifying startup equity — potentially the most valuable tax benefit available to startup founders and early investors.
What is QSBS?
Qualified Small Business Stock (QSBS) is a provision under IRC Section 1202 that exempts up to $10 million — or 10 times the taxpayer's adjusted basis, whichever is greater — from federal capital gains tax when selling shares in a qualifying small business. To qualify: the company must be a domestic C-Corporation with gross assets under $50M at the time of investment, the shares must be acquired at original issuance (not secondary market), the investor must hold the shares for 5+ years, and the company must be in a qualifying industry (most tech and SaaS companies qualify; real estate, hospitality, and financial services generally don't). QSBS is one of the most powerful tax benefits available to startup founders and early-stage investors. A founder who holds $50M in QSBS gains could potentially exclude $10M+ from federal taxes completely.
What is Ordinary Capital Gains?
Ordinary long-term capital gains tax applies to profits from selling assets held more than one year. The federal long-term capital gains tax rates are 0%, 15%, or 20% depending on income level — most high earners pay 20% on investment gains plus the 3.8% Net Investment Income Tax (NIIT), for an effective 23.8% federal rate. Short-term gains (held under one year) are taxed as ordinary income at rates up to 37%. State taxes apply on top of federal rates. Without QSBS, a founder who sells $10M in equity pays approximately $2.38M in federal capital gains taxes (at 23.8%). With QSBS exemption, that tax liability goes to zero. The difference is material enough that QSBS planning is a critical priority for early-stage founders and investors.
Key Differences
| Feature | QSBS | Ordinary Capital Gains |
|---|---|---|
| Federal tax rate | 0% on up to $10M (or 10x basis) | 15–20% + 3.8% NIIT = up to 23.8% federal |
| Holding period | 5+ years required | 1+ year for long-term rates |
| Entity type required | C-Corporation only | Any asset type |
| Acquisition method | Original issuance only (not secondary) | Any acquisition method |
| State taxes | Varies — some states don't recognize QSBS | Varies by state |
| Company size limit | Gross assets <$50M at time of investment | No limit |
When Founders Choose QSBS
- →Early-stage founders and investors in C-Corporations planning their exit tax strategy
- →Investors deciding whether to hold shares for 5 years to qualify for full exemption
- →Company counsel advising on corporate structure to ensure QSBS eligibility
When Founders Choose Ordinary Capital Gains
- →Shares acquired on secondary market (not original issuance)
- →Company is an LLC or S-Corp (not C-Corp)
- →Shares held less than 5 years or in a non-qualifying industry
Example Scenario
A founder invests $100K in their own startup (C-Corp) at founding. Five years later, the company is acquired for $60M and their shares are worth $12M. Their adjusted basis is $100K. QSBS exclusion: 10x basis = $1M, but the flat $10M exclusion applies — they exclude $10M from federal taxes. On the remaining $2M of gains above the exclusion, they pay 20% federal LTCG + NIIT = $476K. Without QSBS, the entire $11.9M in gains (minus $100K basis) would be taxed at 23.8% = $2.83M. QSBS saves this founder over $2.35M in federal taxes.
Common Mistakes
- 1Converting from LLC to C-Corp late — the 5-year clock starts at acquisition of original QSBS shares, so convert early
- 2Assuming all startup equity is QSBS — secondary purchases, LLC interests, and non-qualifying industries don't qualify
- 3Not tracking cost basis — if basis is high, the 10x basis exclusion may be larger than the $10M flat exclusion
- 4Ignoring state QSBS rules — California, for example, doesn't recognize the federal QSBS exclusion
Which Matters More for Early-Stage Startups?
QSBS is always better when you can qualify — the tax savings are potentially millions of dollars. Every early-stage founder and investor should confirm their equity qualifies for QSBS and plan their holding period accordingly. Consult a tax attorney early — the qualification rules are technical and the consequences of getting it wrong are expensive.