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Take Advantage of Expanded
QSB Stock Tax Benefits

Investing in startups and emerging businesses has always been a high-risk, high-reward strategy. While many investors focus on the growth potential of these companies, there is another major advantage that often goes overlooked: powerful tax benefits through Qualified Small Business Stock (QSBS).

Recent changes under the One Big Beautiful Bill Act (OBBBA) have expanded these benefits, making QSBS more attractive than ever for investors. If you’re considering investing in a startup, understanding these new rules could potentially save you millions in taxes.

What Is Qualified Small Business Stock (QSBS)?

Qualified Small Business Stock is stock issued by certain eligible small businesses that meets specific IRS requirements. Not every company qualifies.

Generally, the business must:

  • Be a domestic C corporation
  • Operate an active trade or business
  • Meet specific asset limitations established by the IRS

Many technology, engineering, manufacturing, and innovative startup companies may qualify. However, most professional service businesses, such as law firms, accounting firms, medical practices, and consulting businesses, are excluded.

Expanded Asset Limits Under the New Law

One of the biggest changes under the OBBBA is the increase in the gross asset limit.

Previously, a company could not exceed $50 million in gross assets to qualify for QSBS treatment.

For stock issued after July 4, 2025, that threshold increases to $75 million.

This expansion allows investors to participate in larger and more established startups while still maintaining access to valuable QSBS tax benefits.

New Holding Period Rules

Historically, investors had to hold QSBS for at least five years to receive the full tax benefit.

For stock acquired after July 4, 2025, investors now have access to a new tiered exclusion system:

Hold for 3 Years

  • 50% capital gains exclusion

Hold for 4 Years

  • 75% capital gains exclusion

Hold for 5 Years or More

  • 100% capital gains exclusion

It is important to note that stock acquired before July 4, 2025, remains subject to the previous rules and generally requires a full five-year holding period to qualify for the maximum exclusion.

How Much Gain Can You Exclude?

The tax savings can be substantial.

Under previous law, investors could generally exclude up to $10 million in gains.

For QSBS acquired after July 4, 2025, the exclusion limit increases to:

  • $15 million, or
  • 10 times your adjusted basis in the stock,

whichever amount is greater.

For successful startup investments, this could result in millions of dollars of tax-free gains.

Understanding the Tax on Non-Excluded Gains

If you sell before qualifying for a full exclusion, the portion of gain that does not qualify for exclusion is generally taxed at a special 28% capital gains rate.

In addition, high-income investors may also be subject to the 3.8% Net Investment Income Tax (NIIT) on taxable portions of the gain.

Proper planning can help reduce or eliminate these taxes.

Important Qualification Requirements

One of the most commonly misunderstood rules involves how the stock is acquired.

To qualify for QSBS treatment, investors generally must acquire the stock directly from the company at its original issuance.

This means:

  • Buying shares directly from the startup may qualify.
  • Purchasing shares from another investor on the secondary market generally does not qualify.

Failing to meet this requirement can eliminate the tax benefits entirely.

The 60-Day Rollover Opportunity

QSBS offers another valuable planning tool.

If you sell qualifying QSBS and reinvest the proceeds into another qualifying QSBS investment within 60 days, you may be able to defer recognition of the gain.

This allows investors to continue growing their portfolios while postponing taxes and preserving capital for future investments.

Why This Matters

Consider an investor who purchases $500,000 worth of qualifying startup stock after July 4, 2025.

Several years later, the investment grows to $12 million.

Under the new QSBS rules, a significant portion—or potentially all—of that gain could be excluded from federal capital gains tax if the holding period requirements are met.

That kind of tax savings can dramatically increase overall investment returns.

Conclusion

Qualified Small Business Stock remains one of the most powerful wealth-building opportunities available under the tax code. With increased asset thresholds, higher exclusion limits, and shorter holding-period benefits, the new OBBBA rules create even more opportunities for startup investors.

However, QSBS rules are highly technical, and a small mistake can cause you to lose valuable tax benefits. Before investing in a startup or planning an exit strategy, it is critical to verify that the company and investment structure qualify.

If you are considering investing in a startup or want to determine whether your investment qualifies for QSBS treatment, contact Guerrero CPA at 210-490-7100. Our team can help you evaluate opportunities, maximize tax savings, and develop a strategy that keeps more of your investment gains where they belong—in your portfolio.