Qualified Small Business Stock (QSBS) under IRC §1202 can allow founders and early investors to exclude up to $10 million — or 10× their tax basis — from federal capital gains tax. But only if you set things up correctly from day one.

What Qualifies?

To be eligible, a few boxes must be checked:

• Stock issued by a domestic C corporation
• Company gross assets under $50 million at issuance
• At least 80% of assets used in an active qualified trade or business*
• Stock held for more than five years

*Excluded businesses: Law firms, accounting firms, consulting businesses, and financial services firms do not qualify.

The LLC Trap

This is where many founders get burned. LLCs — whether taxed as a partnership or with an S corp election — do not qualify for QSBS. Membership interests aren’t “stock” under IRC §1202, and S corporations are specifically excluded.

The scenario plays out more often than you’d think: a founder launches as an LLC, builds real traction, and only later — once the company has meaningful value — converts to a C corporation. Appreciation that occurred before the conversion may not qualify for QSBS treatment, because the holding period generally does not begin until the entity is treated as a C corporation and qualifying stock is considered issued.

Late conversions also raise a tangle of secondary issues that are easy to underestimate:

• Original issuance requirements. QSBS must be issued directly by the corporation in exchange for money, property, or services. A conversion doesn’t automatically satisfy this — how the stock is treated at the time of conversion matters.
• Valuation questions. If the company has already appreciated, determining the fair market value of stock at issuance becomes more complicated and more scrutinized.
• Holding period uncertainty. Questions can arise about when the clock actually starts — and pre-conversion time generally does not count.

The stakes are high enough that this deserves serious attention before you assume your equity qualifies.

The Right Approach

The cleanest path is simple: form a Delaware C corporation from inception.

If you’re already operating as an LLC, you may be able to file a “check-the-box” election on IRS Form 8832 to be taxed as a C corporation — but this needs to happen early, before significant appreciation occurs. Any prior S corp election must also be revoked first.

Timing is Everything

Founders and investors want the holding period to begin as early as possible — while the company valuation is still low. That means getting corporate documentation, stock issuance records, cap tables, and tax elections right from the start, with both startup counsel and a QSBS-savvy CPA involved.

Bottom line

When structured properly, QSBS is one of the most powerful tax benefits available to startup founders. It often plays a decisive role in entity selection and early-stage financing strategy — and it’s worth planning around from day one.