If you operate your business as a C corporation, you may qualify for a valuable tax break through qualified small business (QSB) stock. Recent legislation has expanded this opportunity, making it even more attractive for entrepreneurs and investors.
What Is a QSB Corporation?
QSB corporations are a type of C corporation that function like regular C corporations for legal and tax purposes. They benefit from the flat 21% federal corporate tax rate, but shareholders may also enjoy a special gain exclusion. This exclusion can allow them to avoid federal income tax on up to 100% of the gain from selling QSB stock. Note: C corporations themselves don’t qualify for the exclusion, but pass‑through entities such as S corporations, partnerships, and LLCs may pass the benefit to their individual owners.
Which Shares Qualify as QSB Stock?
To take advantage of the gain exclusion, several requirements must be met:
- Shares must be acquired at original issuance, or by gift or inheritance.
- The corporation must qualify as a QSB when the stock is issued and throughout ownership. Its assets must not exceed $75 million ($50 million if issued before July 4, 2025).
- The corporation must actively conduct a qualified business. Certain service businesses are excluded.
- Timing matters: shares acquired after September 27, 2010, and held for at least five years qualify for the 100% exclusion.
How the OBBBA Expanded the Exclusion
The One Big Beautiful Bill Act (OBBBA) raised the QSB asset ceiling and introduced new exclusion tiers for shares acquired after July 4, 2025:
- 50% exclusion for shares held at least three years.
- 75% exclusion for shares held at least four years.
- 100% exclusion for shares held at least five years.
For these shares, the excludable gain is capped at the greater of:
- 10 times your aggregate tax basis in the stock sold, or
- $15 million ($7.5 million if married filing separately), reduced by prior exclusions from the same corporation.
Next Steps
The QSB stock gain exclusion, combined with the 21% corporate tax rate, makes QSB corporations an appealing choice. Business owners may consider converting an existing unincorporated business into a QSB corporation to unlock these benefits. Professional guidance is essential to navigate the rules and maximize savings.
Conclusion
QSB stock offers a powerful tax‑saving opportunity for C corporation owners and investors. With the expanded rules under OBBBA, planning ahead can help you secure tax‑free gains and strengthen your financial strategy.