After OBBBA, Should My Startup Be a C-Corporation or an LLC?

You’re about to form your startup.

One advisor tells you to choose an LLC because it’s simple, flexible, and less expensive to maintain.

Another recommends a Delaware C-corporation, even though it involves more paperwork and ongoing compliance.

Both arguments sound reasonable. So which structure makes more sense?

The answer depends on much more than formation costs. Your choice of business entity can affect fundraising, taxation, future acquisitions, and how much of your eventual exit proceeds you actually keep. The One Big Beautiful Bill Act (OBBBA) introduced significant changes to the Qualified Small Business Stock (QSBS) rules, making entity selection an even more important decision for founders planning to build venture-backed companies.

Why Entity Choice Matters

Many founders treat entity selection as an administrative step that can always be changed later.

In reality, your legal structure may affect your company throughout its entire life cycle.

Choosing between a C-corporation and an LLC is no longer simply a question of simplicity versus complexity. For startups expecting outside investment or a future acquisition, the decision can directly affect valuable tax benefits available when the business is eventually sold.

Making the right choice at formation is often much easier than restructuring years later.

Why QSBS Is Important

One of the biggest advantages available to founders of eligible C-corporations is Qualified Small Business Stock (QSBS).

QSBS allows eligible founders and early investors to exclude a substantial portion of the gain when qualifying C-corporation shares are sold. Only C-corporations can issue QSBS-eligible stock.

For startups that experience significant growth, this can produce substantial federal tax savings when founders eventually exit the business.

An LLC taxed as a partnership cannot provide the same benefit.

What Changed Under OBBBA?

The One Big Beautiful Bill Act expanded the QSBS rules for qualifying stock issued after July 4, 2025.

Some of the most significant changes include:

• The per-issuer exclusion cap increased from $10 million to $15 million.
• The gross assets threshold increased from $50 million to $75 million.
• New holding-period rules now provide partial tax benefits before the traditional five-year holding period.

These changes make QSBS available in more situations and may increase its value for qualifying founders and investors.

Earlier Exits May Now Receive Partial Benefits

Before the legislative changes, founders generally needed to hold qualifying shares for at least five years to receive the full QSBS benefit.

OBBBA introduced a new tiered approach:

• 50% exclusion after three years.
• 75% exclusion after four years.
• 100% exclusion after five years or more.

For founders whose companies exit before reaching the five-year mark, these new rules may provide valuable tax relief that previously was unavailable.

Why Converting an LLC Later May Not Produce the Same Result

Some founders choose to begin as an LLC and convert into a C-corporation only after raising outside capital.

While conversion may be possible, it does not fully preserve the tax advantages available to companies that begin as C-corporations.

When an LLC converts into a C-corporation, both the QSBS holding period and the applicable gross assets test begin at the time of conversion rather than when the business was originally formed.

That means years spent operating as an LLC generally do not count toward the QSBS holding period.

For founders expecting to pursue venture capital or an eventual acquisition, delaying the conversion may reduce the potential tax benefits available later.

Investors Often Prefer C-Corporations

Entity choice also affects fundraising.

Many venture capital firms prefer investing in Delaware C-corporations because the structure is familiar, standardized, and generally aligns with venture financing practices.

Investors and potential buyers frequently review a company’s formation history and ownership structure during due diligence. A late or complicated entity conversion may raise additional questions and create unnecessary delays during financing or acquisition discussions.

While entity choice is only one part of due diligence, establishing the appropriate structure early can simplify future transactions.

Common Founder Mistakes

• Choosing an LLC solely because it is easier to form: Simplicity at the beginning may result in losing valuable QSBS opportunities if the company later becomes venture-backed.
• Assuming an LLC can be converted later without consequences: Converting to a C-corporation generally starts both the QSBS holding period and the applicable gross assets test from the conversion date.
• Ignoring how entity choice affects fundraising: Many venture investors prefer investing in C-corporations, making the initial legal structure an important consideration for companies planning to raise capital.
• Treating entity selection as a minor administrative decision: Formation structure often influences future fundraising, tax planning, due diligence, and exit opportunities throughout the life of the company.

10-Minute Entity Choice Self Check

• Do I expect to raise venture capital?
• Am I planning to build the company for an eventual acquisition or exit?
• Will my company qualify for QSBS under the current asset thresholds?
• Do I understand when my QSBS holding period begins?
• Have I compared the long-term tax consequences of a C-corporation and an LLC?
• Could delaying a conversion reduce future QSBS benefits?
• Have I discussed entity selection with experienced legal and tax advisers before filing formation documents?

If you cannot answer yes to the ones that matter, you have a gap to close before launch.

Bottom Line

The OBBBA changes have made entity selection even more important for startups planning to raise capital and pursue long-term growth. While an LLC may provide flexibility in some situations, a C-corporation can offer significant advantages through QSBS eligibility, particularly after the expanded rules introduced by the new legislation. Understanding these differences before your company is formed is often far easier than trying to restructure after investors or buyers become involved.

Set Up Your Startup on the Right Legal Foundation From Day One

Join our upcoming Product Launch Master Class to learn how to identify legal risks before launch, understand which agreements and policies your business may need, and prepare your company for customers, investors, and future growth.

Register now: https://primumlaw.com/product-launch-master-class/