Qualified Small Business Stock (QSBS): Tax Benefits, Rules & Planning Strategies

For company founders, early employees and early-stage investors, Qualified small business stock (QSBS) can be a powerful way to save on capital gains taxes. But as with most generous tax provisions, there are plenty of rules around who and what qualifies. In our, some of the most valuable QSBS planning happens years before a company is sold.

The rules also recently changed. The One Big Beautiful Bill Act (OBBBA) expanded QSBS benefits for qualifying stock acquired after July 4, 2025, including new holding periods and a higher gain exclusion limit. Stock acquired before that date generally remains subject to the previous rules, making it especially important to know which rules apply to your shares. Working with your wealth manager and tax advisor early can help you understand how those rules apply to your circumstances and identify planning opportunities before a sale.

What is qualified small business stock (QSBS)?

QSBS is stock issued by certain U.S. C Corporations that may qualify for favorable federal tax treatment under Section 1202 of the Internal Revenue Code. If specific requirements are met, eligible shareholders may exclude some or all of the capital gains realized when they sell qualifying shares.

The idea behind QSBS is fairly straightforward. Congress created the QSBS tax exclusion in 1993 to provide incentives to invest in new businesses that enhance the nation’s competitiveness and accelerate job creation. Now, more than three decades later, the One Big Beautiful Bill Act (OBBBA) expanded the tax benefits available for newly issued qualifying stock acquired after July 4, 2025.

The QSBS statute was drafted to allow investors to exclude capital gains on qualified businesses, especially those engaged in research and development of new technologies. Once an investor has owned the shares for five years, they are potentially able to exclude a large portion of capital gain, up to the greater of $15 million (indexed for inflation for qualifying stock acquired after July 4, 2025) or 10 times their original investment.

What are the tax benefits of QSBS?

QSBS has become even more valuable under the One Big Beautiful Bill Act (OBBBA), signed into law in July 2025.

For QSBS acquired after July 4, 2025:

• Investors who hold shares for three years may exclude 50% of eligible capital gains.
• After four years, the exclusion increases to 75%.
• After five years, investors continue to qualify for a 100% exclusion.
• The maximum exclusion increased from $10 million to $15 million (indexed for inflation), or 10 times the investor’s original cost basis if greater.

These changes provide additional flexibility for founders, employees and investors who may need liquidity before reaching the traditional five-year holding period while preserving the full benefit for longer-term owners.

What qualifies as QSBS?

Given the size of the potential tax break, understandably there are many requirements that must be met for the QSBS gain exclusion:

1. The shares must be in a U.S. C Corp business
2. The investor generally must acquire shares directly from the company at original issue
3. The corporation’s aggregate gross assets generally must not exceed $75 million (indexed for inflation) immediately after the stock is issued for QSBS acquired after July 4, 2025. For stock issued on or before that date, the previous $50 million threshold generally applies.

Finally, the business must operate as a qualified business activity. This last restriction is the most subjective, with some debate about the companies that qualify. The IRS defines any trade or business as “qualified” other than those specifically excluded. Most professional services, finance, farming, resource extraction and hospitality businesses do not qualify.

There are also a myriad of eligibility rules pertaining to the holder of the shares. It’s also important to understand that stock options themselves do not qualify as QSBS. The shares generally become eligible only after the options are exercised and the stock is acquired, assuming all other QSBS requirements are met.

Given the complexity of the tax code around the qualification, it’s important you have a tax professional well-versed in the rules on your team. Also, stay in contact with a knowledgeable person at the company where you hold the shares, such as the corporate counsel or chief financial officer.

Planning considerations for QSBS

One of the unique planning challenges with QSBS is balancing the potential tax benefits against the risks of holding a concentrated stock position. Waiting to qualify for the full exclusion may increase the amount of gain you can exclude from taxes, but it can also leave you with a larger portion of your wealth tied to a single company.

The right approach depends on your financial goals, risk tolerance and tax situation. Some investors choose to hold their shares until they qualify for the full exclusion, while others determine that reducing concentration risk is the higher priority. Depending on your situation, tax-aware diversification strategies, such as long-short strategies, may help reduce concentration risk while managing the tax impact.

Because these decisions involve significant tax and investment tradeoffs, it’s important to work with experienced tax and wealth managers before selling or diversifying QSBS.

Diversify your concentrated QSBS holdings

The problem with high-gain, concentrated assets in your portfolio is that the concentration may be too risky for your specific financial situation, but there’s potentially a high tax cost to selling. With QSBS, the potential tax benefit adds another consideration to the decision of when to sell and diversify. Depending on your circumstances, you may have a few options:

• Option 1 — Sell and diversify. If your shares qualify for the QSBS exclusion, selling some or all of your position may allow you to diversify while reducing the tax impact. For qualifying stock acquired after July 4, 2025, the graduated exclusions may also provide more flexibility to diversify before reaching the five-year holding period.
• Option 2 — Continue holding the shares. Waiting may allow you to qualify for a larger QSBS exclusion, but the potential tax savings should be weighed against the risks of continuing to hold a concentrated position.
• Option 3 — Consider other diversification strategies. Depending on your situation, an exchange fund or tax-aware diversification strategy, such as a long-short strategy, may help reduce concentration risk while managing the tax impact. Each approach comes with its own costs, risks and trade-offs.

If you are fortunate to have mature QSBS shares with large gains, these then become an obvious candidate to sell and diversify. For qualifying stock acquired after July 4, 2025, you may exclude gains up to $15 million (indexed for inflation) or 10 times your cost basis, whichever is greater. Working with a financial advisor can help you understand if that will help you reach your financial goals or map out the additional steps needed to get you there.

Consider your holding period before selling

For many years, investors generally needed to hold QSBS for five years before qualifying for any federal capital gains exclusion. For qualifying stock acquired after July 4, 2025, the OBBBA introduced a graduated benefit: investors may exclude 50% of eligible gains after three years, 75% after four years and 100% after five years.

That creates some new choices. Holding shares for five years still provides the greatest potential exclusion, but you may now have more flexibility if you’re evaluating an acquisition offer, need liquidity or want to diversify sooner. Understanding the holding period for your shares can help you weigh the potential tax benefit against your broader financial goals.

Consider QSBS when exercising stock options

Most early employees of a startup get their equity compensation in the form of options. Stock options themselves do not qualify as QSBS. Instead, QSBS treatment begins only after you exercise the options and acquire the shares, assuming the other eligibility requirements are met.

Remember that one of the qualifications to get the QSBS exclusion is that the corporation’s aggregate gross assets must generally not exceed the applicable threshold immediately after the stock is issued. For qualifying stock acquired after July 4, 2025, that threshold is r $75 million. With options, the relevant date isn’t when you are granted the options, but when you exercise them and buy shares. Part of your calculus on whether to exercise needs to include retaining QSBS exclusion eligibility. If you wait to exercise and your company’s aggregate gross assets exceed the applicable threshold, then you may lose out on gaining QSBS status.

Of course, this must be weighed with other considerations when exercising options. These include your views on the future of your company, potential alternative minimum tax liability and your personal circumstances. There are many factors to consider, and working with your wealth manager and tax advisor can help you identify and evaluate them.

Consider QSBS in your estate plan

Recall that the QSBS exclusion limits apply per issuer, per taxpayer. This may open the door for advanced planning techniques. One such example is to gift the shares, either outright to children or through irrevocable trusts. This has the potential to multiply the QSBS benefit — by applying the capital gain exclusion to you and also to the other taxpayer, whether it be a person or a non-grantor trust.

But there’s an important trade-off to consider. While gifting QSBS may create significant income tax savings across family members, it can also create gift tax consequences for the person making the gift. The potential QSBS benefit should therefore be considered alongside the broader impact on your estate plan.

This planning should be done with tax, estate planning and wealth management professionals experienced in QSBS rules. The value of the shares, timing of the gift and structure of the transfer can all affect the outcome.

These are only some of the planning considerations that can arise with QSBS. Depending on your circumstances, other strategies may also be worth exploring as part of your broader financial plan.

How can you maximize your QSBS tax benefits?

The rules governing QSBS have changed significantly with the passage of the OBBBA. While the expanded benefits create new planning opportunities, the eligibility requirements remain highly technical. Small differences in when stock was issued, how it was acquired and how long it is held can materially affect the available tax benefit.

That’s why good recordkeeping matters. Keep documentation showing when and how you acquired your shares, your cost basis and information supporting the company’s QSBS eligibility. Those details may become especially important years later when you’re preparing for a sale.

And don’t wait until a liquidity event to start planning. In our experience, some of the most valuable QSBS planning happens years before a company is sold. Working with your wealth manager, tax advisor and estate planning attorney early can help you understand which rules apply to your shares, evaluate the trade-offs of different strategies and make informed decisions as your circumstances change.

Frequently asked questions about QSBS

Does every startup qualify for QSBS?

No. To qualify for QSBS treatment, the stock and the company must meet specific requirements under Section 1202 of the Internal Revenue Code. Among other requirements, the company generally must be a U.S. C corporation, its aggregate gross assets must fall below the applicable threshold when the stock is issued and it must operate a qualified trade or business.

Certain types of businesses are excluded, including many professional services, financial services, farming, resource extraction and hospitality businesses.

Do stock options qualify as QSBS?

No. Stock options themselves do not qualify as QSBS. Shares acquired when you exercise stock options may qualify if the company and shares meet the applicable requirements. The QSBS holding period generally begins when you exercise the options and acquire the shares, not when the options are granted.

What happens if I sell QSBS before five years?

For qualifying stock acquired after July 4, 2025, you may be eligible for a partial federal capital gains exclusion before reaching five years. Under the OBBBA, eligible shareholders may exclude 50% of qualifying gains after three years and 75% after four years. After five years, the exclusion increases to 100%.

Different rules generally apply to QSBS acquired on or before July 4, 2025, so the date you acquired your shares matters.

Can QSBS be gifted?

Yes. QSBS can generally be gifted, and in certain circumstances the recipient may retain the stock’s QSBS status and holding period. Gifting QSBS to family members or certain trusts may create additional planning opportunities because the exclusion generally applies per taxpayer, per issuer.

However, the potential income tax savings need to be weighed against gift and estate tax consequences, particularly when the shares have appreciated significantly. Work with your tax and estate planning professionals before transferring QSBS.

What rules apply to QSBS acquired before July 4, 2025?

QSBS acquired on or before July 4, 2025, generally continues to follow the rules that applied before the OBBBA changes. That includes the previous five-year holding period for the Section 1202 exclusion and the applicable exclusion limits and eligibility requirements.

The new graduated three-, four- and five-year exclusion schedule and increased $15 million exclusion limit generally apply to qualifying stock acquired after July 4, 2025. If you hold older QSBS, it’s important to determine which rules apply to your specific shares.

Can I use both QSBS exclusion ?

Potentially, yes. The standard dollar exclusion and the 10-times-basis exclusion aren’t necessarily an either/or proposition over the life of your QSBS investment. Depending on the shares you hold and when you sell them, you may be able to use one limit in one tax year and benefit from the other in a subsequent year.

Because the calculation depends on your tax basis, the shares you hold and prior exclusions taken for the same issuer, this is an area to review carefully with your tax advisor.

Planning around QSBS?

The decisions you make today can affect the tax opportunities available years from now. If you hold QSBS or think your shares may qualify, our team can help you understand how it fits into your broader financial plan and coordinate with your tax and estate planning professionals.

Talk with a wealth manager