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QSBS Exclusion: A Powerful Tool for Startup Founders

Understanding how Qualified Small Business Stock can help founders exclude up to $10 million in capital gains from federal taxes.

Sarah Goldstein

Director, Tax Strategy

April 15, 2026
8 min read

## What is QSBS?

Qualified Small Business Stock (QSBS) is one of the most powerful tax benefits available to entrepreneurs and startup investors. Under Section 1202 of the Internal Revenue Code, investors who hold QSBS for more than five years may be able to exclude up to $10 million (or 10x their investment basis, whichever is greater) of capital gains from federal income tax.

Qualification Requirements

To qualify for the QSBS exclusion, the stock must meet several requirements:

  1. The company must be a domestic C corporation when the stock is issued. LLCs and S corporations do not qualify, though many startups convert to C corps specifically to enable QSBS treatment.
  1. At the time the stock is issued, the corporation's gross assets must not exceed $50 million. This includes cash received for the stock being issued.
  1. At least 80% of the corporation's assets must be used in the active conduct of a qualified trade or business. Certain industries are excluded, including professional services, banking, hospitality, and natural resource extraction.
  1. The stock must be acquired at original issuance in exchange for money, property (other than stock), or services.
  1. The stock must be held for more than five years to qualify for the full exclusion.

The Exclusion Amount

For stock acquired after September 27, 2010, shareholders can potentially exclude 100% of their gain, up to the greater of: - $10 million, or - 10 times the adjusted basis of the stock

This means if you invested $1 million in qualifying stock, you could potentially exclude up to $10 million in gains—completely tax-free at the federal level.

State Tax Considerations

While QSBS provides a complete federal exclusion, state treatment varies significantly: - California: Does not recognize QSBS exclusion; gains are fully taxable - New York: Partial exclusion may be available - Many other states: Follow federal treatment

Planning Strategies

Gift to Family Members Each taxpayer has their own $10 million exclusion. Gifting QSBS to family members (holding period tacks) can multiply the total exclusion available.

Trust Planning Strategic use of trusts can create additional exclusions while maintaining family control and asset protection benefits.

Stacking with Other Benefits QSBS can potentially be combined with other tax benefits like Opportunity Zone investments for additional tax advantages.

Action Items for Founders

  1. from company formation
  2. in company stock carefully
  3. at issuance
  4. before considering liquidity
  5. strategies to multiply exclusions

Working with Advisors

QSBS planning involves complex tax rules that interact with securities law, estate planning, and corporate governance. Work with qualified advisors who understand all dimensions of this powerful benefit.

Have Questions About This Topic?

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