Most founders pick their corporate structure the way they pick a phone plan, they glance at the label, sign the form, and never look again. That single unexamined choice can quietly cost a profitable California business owner $20,000 or more every year. The difference between s corp vs c corp is not a technicality your accountant should whisper about at year end. It is the single biggest lever most business owners have over how much of their own money the IRS gets to keep, and how much lands in their bank account.

This information is current as of 9/29/2026. Tax laws change frequently. Verify updates with the IRS or the California Franchise Tax Board (FTB) if reading this later.

Quick Answer: What Is the Difference Between S Corp vs C Corp?

A C corporation is a separate taxpaying entity. It files its own return, pays a flat 21 percent federal corporate tax on profit, and then any money it hands to owners as dividends gets taxed again on their personal return. That is double taxation. An S corporation is a pass-through entity. It does not pay federal income tax itself. Instead, profit flows straight through to the owners’ personal returns and is taxed once. For most small and mid-sized profitable businesses, the S corp wins on tax. For companies chasing venture capital or reinvesting every dollar, the C corp often makes sense.

That is the headline. But the headline hides the money, and the money is in the details. Let us break down exactly where the difference between s corp vs c corp shows up in real dollars.

Single vs Double Taxation: Where the Real Money Lives

The heart of this entire decision comes down to how many times your profit gets taxed before it reaches you. This is not abstract. It is the mechanism that decides whether you keep 80 cents on the dollar or closer to 55 cents.

How a C Corp Gets Taxed Twice

Picture a C corporation that earns $200,000 in profit. First, the corporation pays the flat 21 percent federal corporate income tax, which is $42,000. That leaves $158,000. Now the owner wants that money in their pocket, so the corporation pays it out as a dividend. Qualified dividends are taxed again on the owner’s personal return, often at 15 or 20 percent depending on income, plus a possible 3.8 percent net investment income tax.

At a 20 percent dividend rate, that second layer strips away roughly $31,600 more. The owner started with $200,000 of company profit and walked away with about $126,400. The government took roughly $73,600. That is double taxation in plain English: the same dollar taxed at the corporate level, then taxed again when it reaches you.

How an S Corp Gets Taxed Once

Now run that same $200,000 through an S corporation. The corporation pays zero federal income tax. The entire $200,000 passes through to the owner’s personal return and is taxed one time at their individual rate. Even at a 32 percent marginal bracket, that is $64,000 in tax, and the owner may also qualify for the 20 percent Qualified Business Income deduction under Section 199A, which can shave thousands more off the bill.

Key Takeaway: On $200,000 of profit that you want to take home, the S corp structure can leave $15,000 to $25,000 more in your pocket than a C corp, every single year.

The Reasonable Salary Rule: Why S Corp Owners Win on Payroll Tax

Here is the S corp advantage almost nobody explains clearly. When you own an S corporation and work in it, the IRS requires you to pay yourself a reasonable salary. That salary is subject to payroll taxes, Social Security and Medicare, totaling 15.3 percent. But any profit above that salary comes out as a distribution, and distributions are not subject to that 15.3 percent payroll tax.

This is the split that saves solo operators and small teams real money. Many business owners discover that restructuring their pay between salary and distribution is where the biggest annual savings hide.

A Real Numbers Example

Say your S corp earns $150,000 in profit and you pay yourself a reasonable salary of $70,000. You owe payroll tax on the $70,000 salary, roughly $10,710. The remaining $80,000 comes to you as a distribution with no payroll tax attached. Compare that to a sole proprietor earning the same $150,000, who pays self-employment tax on nearly the entire amount. The self-employment tax bill alone could exceed $21,000. The S corp structure can cut that in half.

Red Flag Alert: The word reasonable is doing heavy lifting here. If you pay yourself a $20,000 salary on $150,000 of profit to dodge payroll tax, the IRS will notice. They can reclassify your distributions as wages, hit you with back payroll taxes, and add penalties. Reasonable means what a similar professional would earn doing your job. Document how you arrived at the number.

For a complete breakdown of how to structure salary, distributions, and elections the right way, see our complete guide to S Corp tax strategy in California.

S Corp vs C Corp: Side by Side Comparison

Sometimes the cleanest way to see the difference between s corp vs c corp is to lay the factors next to each other.

Notice that the C corp is not always the loser. If you plan to raise money from investors, issue preferred stock, or reinvest profits for years without paying yourself, the C corp structure is built for that. The S corp shines when you want to pull profit out and pay tax once.

KDA Case Study: California Consultant Restructures and Saves $18,400

Marcus, a 42-year-old management consultant in Orange County, was operating as a single-member LLC and earning about $185,000 in net profit. Every dollar of that profit was hitting self-employment tax, and he was writing quarterly checks to both the IRS and the FTB that made him wince. He had heard S corp and C corp thrown around but had no idea which fit him, so he did nothing for three years.

When Marcus came to KDA, we ran the numbers on both structures. A C corp would have trapped his money behind double taxation since he needed the profit to live on. Instead, we elected S corp status by filing Form 2553, set his reasonable salary at $85,000 based on comparable consultant compensation data, and structured the remaining $100,000 as distributions.

The result: he saved roughly $15,300 in payroll and self-employment tax, and picked up an additional $3,100 through better use of the Section 199A deduction. That is $18,400 in first-year savings. Marcus paid KDA $3,200 for the restructuring and ongoing strategy, a 5.75x first-year return. He now keeps money that used to vanish into unnecessary tax.

Ready to see how we can help you? Explore more success stories on our case studies page to discover proven strategies that have saved our clients thousands in taxes.

How Do I Actually Elect S Corp Status?

The mechanics matter, because miss the window and you are stuck with the wrong structure for a full tax year. Here is the process in plain steps.

1. Form your entity first. You need an LLC or corporation in place before you can elect S corp treatment. If you already have an LLC, you can keep it and simply elect to be taxed as an S corp.
2. Get your EIN. If you do not have an Employer Identification Number, apply free at IRS.gov. It takes about five minutes.
3. File Form 2553. This is the S corp election form. For a new election to apply to the current tax year, you generally must file within 2 months and 15 days of the start of the tax year, or at any time during the prior year.
4. Set up payroll. As an S corp owner-employee, you must run actual payroll and pay yourself a reasonable salary with proper withholding.
5. File Form 1120-S. This is the annual S corp return, along with a Schedule K-1 for each owner showing their share of profit.

Our entity formation services handle each of these steps so you do not miss a deadline or misfile an election.

What About California? The FTB Charges Both Structures

Federal tax is only half the picture in California, and this is where a lot of out-of-state advice falls apart. California does not fully honor the federal S corp exemption. The FTB imposes a 1.5 percent franchise tax on S corp net income, with an $800 minimum. C corporations face an 8.84 percent California corporate tax rate.

Even so, the S corp usually still wins for California business owners because the 1.5 percent state hit is far smaller than the double taxation drag of a C corp. Every California corporation, S or C, owes the $800 minimum franchise tax under FTB rules. Plan for it. According to the FTB, this minimum applies even in years your business loses money.

Pro Tip: California requires estimated tax payments and specific forms like the 100S for S corps and the 100 for C corps. Missing an estimated payment triggers penalties that compound quickly.

Which Structure Is Right for You? A Decision Framework

Choose an S corp if:

• Your business profit exceeds $50,000 and you take most of it home
• You want to cut payroll and self-employment taxes
• You have 100 or fewer US-based owners
• You want the Section 199A deduction

Choose a C corp if:

• You plan to raise venture capital or issue multiple stock classes
• You will reinvest profits for years rather than distribute them
• You have foreign owners or more than 100 shareholders
• You want maximum deductible owner fringe benefits

What If I Chose Wrong Last Year?

Good news: entity choice is not a life sentence. An LLC or C corp can often elect S corp status going forward, and in some cases you can revoke an S election to become a C corp. There are timing rules and potential built-in gains taxes when converting, so this is not a do-it-yourself weekend project. A single misstep on conversion can trigger unexpected tax. Work with a strategist who models both outcomes before you file anything.

Will Choosing an S Corp Trigger an Audit?

Electing S corp status does not by itself raise your audit risk. What raises risk is paying yourself an unreasonably low salary to dodge payroll tax. The IRS actively examines S corp owner compensation. As long as your salary reflects fair market value for your role and you keep documentation, you are on solid ground. This is exactly why professional compensation benchmarking matters.

Frequently Asked Questions

Can an LLC be taxed as an S corp or C corp?

Yes. An LLC is a legal structure, not a tax structure. You can elect to have your LLC taxed as an S corp by filing Form 2553, or as a C corp by filing Form 8832. This lets you keep the simplicity of an LLC while gaining corporate tax treatment.

Do S corp owners pay self-employment tax?

Not on distributions. S corp owner-employees pay payroll taxes on their reasonable salary, but distributions above that salary escape the 15.3 percent self-employment tax. This is the core payroll savings of the structure.

Is a C corp ever better than an S corp for a small business?

Yes, when you are reinvesting profits, planning to raise outside capital, or want fully deductible owner benefits. If you are pulling profit out to live on, the S corp almost always wins on tax.

Book Your Entity Strategy Session

If you are not certain whether your current structure is quietly draining thousands from your bottom line, that uncertainty is expensive. Our strategy team will model the S corp and C corp outcomes for your exact numbers, set a defensible reasonable salary, and handle every filing so you stop overpaying. Click here to book your consultation now.

The IRS is not going to knock on your door and tell you that you picked the more expensive structure. That is a conversation you have to start yourself.