Thinking About Switching Between a C Corp and an S Corp in 2026?Here's the Fun (and the Fine Print)

9/28/2026 - By Michael Cole, JD, MSPA & Stacey Craig, CPA

Picking C corporation vs. S corporation status is one of those business decisions that sounds dry…until it changes how much tax you pay and how easy it is to bring in investors. And 2026 might be a particularly smart time to take another look.

Switching from a C corp to an S corp can mean pass-through taxes going forward (often reducing the classic “taxed twice” problem). Switching from an S corp to a C corp can open the door to more types of owners, more funding options, and smoother long-term planning. The catch: either move can come with real tax costs, tricky timing, and a few “gotchas” that surprise people.

Below is a practical (and plain-English) tour of the perks, the headaches, and the common pitfalls—plus why 2026 might be the right year to make a change… or a great year to leave things alone.

Why This “C vs. S” Thing Actually Matters

At a high level, C and S status are two totally different tax worlds.

C corporation: the company generally pays income tax. Then, if profits are paid out to shareholders as dividends, shareholders may pay tax again. That’s the famous “double tax.”

S corporation: the company is generally a pass-through for federal income tax. Profits (and losses) usually flow to shareholders, who report them on their own returns. This can avoid a second layer of tax on operating income—but S corps have strict eligibility rules and structural limits.

Because the tax treatment is so different, switching status can change things like:

  • How future profits get taxed,
  • Whether selling appreciated assets triggers company-level tax,
  • Who is (and isn’t) allowed to own shares,
  • How easy it is to raise money or add investors,
  • How hard it is to switch back later.

Move #1: C Corp → S Corp (A.K.A. “Please Stop Taxing Me Twice”)

For many closely held businesses, the appeal is simple: if you switch from C to S, future operating profits may be taxed once (at the shareholder level) instead of being taxed at the company level and then again when distributed.

The big win is pass-through treatment going forward. If your company expects ongoing operating income after the election takes effect, S status can reduce (or eliminate) the long-term sting of double taxation.

This is often attractive when the company is consistently profitable, owners expect regular distributions, you’re not planning an immediate sale of appreciated assets, and the owners can meet the S corp eligibility rules.

One more practical perk: switching sooner starts the clock on certain post-conversion limitations—most importantly, the built-in gains recognition period.

The “Watch Out” Part

The biggest speed bump in a C-to-S switch is the built-in gains tax.

Here’s the idea: switching to S status doesn’t magically erase appreciation that built up while you were a C corp. If you have appreciated assets on day one of your first S year and you sell them during the recognition period, the company may still owe a corporate-level tax on that pre-election gain.

So if you expect to sell big appreciated assets soon after switching, the “only taxed once” story may not play out the way you’re hoping.

Also, S status comes with ongoing rules you have to live with, including limits on:

  • How many shareholders you can have
  • What kinds of people/entities can own shares
  • How your equity is structured (including the one-class-of-stock rule)

These rules can affect day-to-day operations and long-term planning long after the election is filed.

Common “Oops” Moments

A C-to-S conversion can go sideways in a few predictable ways.

Some of the classics:

  • Missing required shareholder consents
  • Choosing the wrong effective date
  • Transferring shares to someone who can’t legally be an S corp shareholder
  • Tripping over trust eligibility rules
  • Underestimating built-in gains tax on a future sale

Trusts are a frequent trouble spot in closely held businesses. A non-qualifying trust can terminate S status, and estate/succession planning is exactly where those issues tend to pop up.

Another potential landmine: passive investment income. If a former C corp has accumulated earnings and profits and brings in too much passive investment income for too long, the S election can terminate.

Move #2: S Corp → C Corp (A.K.A. “We Need More Flexibility”)

Switching from S to C is usually less about an immediate tax break and more about getting room to grow, especially around ownership and capital.

The Upside

The main benefit is simple: you’re no longer boxed in by S corporation eligibility rules.

This can matter a lot if you want to:

  • Bring in investors who can’t own S corp stock
  • Expand the shareholder base
  • Use more flexible equity arrangements
  • Make trust/estate planning simpler
  • Reduce the risk of accidentally losing S status

If you’re expecting outside investment, institutional capital, or a more complex ownership structure, a C corp can be much easier to run.

It also lowers the stress that a future shareholder transfer, trust change, or restructuring could accidentally blow up the S election.

The “Watch Out” Part

The obvious downside from the effective date forward, you’re back in C corporation tax territory. Future profits may be taxed at the corporate level, and distributions can create a second layer of tax for shareholders.

Another big one is the five-year waiting period. After terminating an S election, you generally can’t just switch back next year. In most cases there’s a five-taxable-year lockout (unless you get IRS consent).

Translation: an S-to-C conversion is usually harder to undo than people expect.

Timing can also get messy. If the revocation is effective midyear, you may end up with an S “short year” and a C “short year,” with special rules for splitting income and deductions.

Common “Oops” Moments

Most S-to-C mistakes are procedural or timing-related, like misjudging when the revocation becomes effective, accidentally creating a split (two-part) tax year, missing the required shareholder approval, forgetting about the five-year lockout on re-electing S status, or assuming you can easily switch back if plans change.

That last one matters. If you’re only switching to C status to solve a temporary financing or ownership issue, the inability to switch back quickly can become a serious problem.

So… Why 2026?

Whether 2026 is “the year” depends on your facts, but it can be a great time to evaluate the switch before you’re forced into a rushed decision.

If You’re Thinking C → S

2026 may be a good year to move from C to S if you want pass-through treatment going forward and you want to start the built-in gains clock sooner rather than later.

This can make sense if:

  • You expect operating income (not a near-term asset sale)
  • You’re unlikely to sell appreciated assets during the recognition period
  • Your shareholder group is stable and S-eligible
  • You want to shrink future double-tax exposure

In that scenario, waiting may just delay the benefits.

If You’re Thinking S → C

2026 may be a good year to switch from S to C if you see changes coming that are hard to fit into the S corp rulebook.

For example:

  • Bringing in new investors
  • Reshaping ownership (new classes/rights, new entities, etc.)
  • Using trusts or entities that may not qualify as S shareholders
  • Simplifying succession planning as the business grows

If you’re likely to outgrow the S framework, converting before a problem hits can be cleaner than dealing with an inadvertent termination or a last-minute restructuring.

And When 2026 Is a Terrible Time to Switch

Just as important: sometimes the smartest move is doing nothing (for now).

Reasons C → S Might Not Make Sense

A C-to-S switch may be a bad fit if:

  • The company has major built-in appreciation
  • Expect to sell appreciated assets within about five years
  • Passive investment income is significant
  • Accumulated earnings and profits create extra risk
  • Your shareholder structure is delicate and could easily become ineligible

In those situations, you can end up with the hassle of S status without the tax payoff you expected.

Reasons S → C Might Not Make Sense

An S-to-C switch may be a poor choice if:

  • The company may want to return to S status soon
  • Ownership issues are temporary
  • Shareholders value pass-through treatment
  • The business does not actually need the flexibility of C corporation status

Because of the five-year lockout, a premature move to C status can be costly if circumstances change.

Practical Questions to Ask Before Making the Move

Before converting in either direction, business owners should evaluate a few core questions:

  • Does the company hold appreciated assets?
  • Is a sale expected within five years?
  • Does the corporation have accumulated earnings and profits?
  • Is passive investment income material?
  • Are any shareholders trusts, partnerships, LLCs, or other potentially ineligible owners?
  • Is outside investment expected?
  • Could the company want to reverse the decision within five years?

These questions often matter more than the abstract tax differences between C and S status.

Final Takeaway

A conversion between C corporation and S corporation status can be valuable, but it is rarely simple.

A C-to-S conversion may offer future pass-through treatment and reduce double taxation on future earnings, but it can come with built-in gains tax exposure and strict eligibility requirements.

An S-to-C conversion may provide ownership and financing flexibility and reduce the risk of inadvertent S termination, but it reintroduces corporate-level tax and is generally difficult to reverse for five years.

For 2026, the right answer depends on the company’s assets, shareholder profile, expected transactions, and long-term plans. The best time to convert is usually not when the issue becomes urgent, but when the company still has time to plan around the tax costs and structural consequences.

Choose the Business Structure That Supports Your Long-Term Goals

Choosing between a C corporation and an S corporation is about more than tax rates. The right entity structure can influence how your business grows, attracts investors, manages ownership transitions, and plans for future tax obligations. As your company evolves, the structure that once made sense may no longer be the best fit.

At Saltmarsh, we work with business owners to evaluate entity selection, tax planning, ownership structure, succession planning, and growth strategies. Our professionals help clients understand the tax implications and long-term considerations before making important business decisions.

If you're considering converting your business from a C corporation to an S corporation, or vice versa—we would welcome the opportunity to talk. Contact Saltmarsh today to determine which structure best supports your business goals.

About the Authors

Michael Cole, JD, MSPA

Michael is a partner with experience across tax, accounting, and advisory services. He began his career in public accounting over 15 years ago, focusing on tax consulting and compliance. His primary areas of experience include providing services related to mergers and acquisitions, 704(b) allocations, and complex transaction structuring for private equity firms and family offices.

Stacey Craig, CPA

Stacey is a partner with experience across tax compliance, planning, and consulting services. Stacey is a trusted tax advisor known for delivering clear, strategic guidance that helps clients make confident financial decisions. With more than two decades of experience in tax compliance, planning, and consulting, she brings deep expertise to partnerships, S corporations, nonprofits, high-net-worth individuals, trusts, and estates.

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