Most business owners pick between an S Corp or C Corp based on what their buddy at the gym did, or whatever their last accountant filed without explaining why. That instinct costs people thousands every single year. The truth is that the entity election you make is one of the highest-leverage tax decisions you will ever sign, and getting it wrong can mean double taxation, a bloated self-employment tax bill, or a missed window that locks you into the wrong structure for an entire tax year.
Quick Answer: S Corp or C Corp in Plain English
An S Corp is a pass-through entity, meaning profits flow straight to your personal return and get taxed once at your individual rate. A C Corp is a separate taxpayer that pays a flat 21 percent corporate tax, and then you get taxed again on any dividends you take out, which is the famous double taxation problem. For the 2026 tax year, most profitable small and mid-sized businesses keep more cash with an S Corp, while companies planning to raise venture capital, retain large profits, or offer wide equity typically lean C Corp. The number that decides it is usually your net profit and what you plan to do with it.
What an S Corp Actually Does to Your Tax Bill
An S Corporation is not a type of business. It is a tax election you make with the IRS by filing Form 2553. (In plain English: you form an LLC or corporation first, then you tell the IRS to tax it as an S Corp.) The headline benefit is that it lets you split your income into two buckets: a reasonable salary that gets hit with payroll taxes, and remaining profit distributions that do not get hit with the 15.3 percent self-employment tax.
Here is why that matters. If you are a sole proprietor or a single-member LLC earning $140,000 in net profit, you pay self-employment tax on nearly all of it. That is roughly $19,800 before you even touch income tax. Elect S Corp status, pay yourself a reasonable salary of $70,000, and take the other $70,000 as a distribution, and you only pay payroll tax on the salary portion. That maneuver alone can save you $8,000 to $10,000 in a single year.
Many business owners never run this math because they assume the payroll paperwork is not worth it. For anyone clearing $60,000 or more in profit, it almost always is.
Step-by-Step: How to Elect S Corp Status
- Form your legal entity first – Register your LLC or corporation with your state before anything else.
- Get your EIN – Apply free at IRS.gov/EIN; it takes about five minutes.
- Complete Form 2553 – Enter your business name, EIN, and the exact date you want the election to begin.
- File on time – For a new business, you generally have 2 months and 15 days from formation; for an existing one, file by March 15 to take effect for the current year.
- Set up payroll – You must run a real paycheck with withholding before year-end to validate your reasonable salary.
Key Takeaway: The S Corp election only works if you actually pay yourself a reasonable W-2 salary. Skipping payroll is the fastest way to invite an audit.
What a C Corp Actually Does to Your Tax Bill
A C Corporation is the default structure for corporations and is treated as its own taxpayer. It files Form 1120 and pays a flat 21 percent federal rate on profits. The downside everyone warns about is double taxation: the company pays tax on its earnings, and then shareholders pay tax again on dividends they receive.
So why would anyone choose it? Because for certain goals, the C Corp is unbeatable. If you plan to raise outside capital, venture investors almost always require a C Corp. If you want to keep profits inside the business to fund growth rather than pull them out, that flat 21 percent can be lower than your personal marginal rate. And C Corps unlock benefits S Corps cannot fully use, like broader fringe benefit deductions and the potential Qualified Small Business Stock exclusion under Section 1202, which can exempt up to $10 million in gain when you sell.
If your business model involves reinvesting heavily, building toward an acquisition, or offering equity to a wide pool of employees and investors, the C Corp structure is worth a serious look alongside our entity formation services to make sure it is set up correctly from day one.
Who the C Corp Fits Best
- Startups raising venture capital or angel investment
- Companies planning to reinvest most profits instead of distributing them
- Founders targeting a future sale who want the Section 1202 gain exclusion
- Businesses offering stock options to a large or international team
S Corp or C Corp: A Side-by-Side Comparison
When clients ask me to settle the S Corp or C Corp debate, I put the real differences in front of them. Here is the comparison that cuts through the noise.
| Factor | S Corp | C Corp |
|---|---|---|
| Taxation | Pass-through, taxed once | Corporate level plus dividends |
| Federal Rate | Your personal rate | Flat 21 percent |
| Self-Employment Tax | Only on salary | Not applicable to distributions |
| Shareholder Limit | 100 max, US citizens/residents | Unlimited, any nationality |
| Stock Classes | One class only | Multiple classes allowed |
| Best For | Profitable owner-operators | Growth and capital raising |
For a deeper breakdown of how these rules apply specifically to California owners, see our complete guide to S Corp tax strategy in California.
KDA Case Study: Consultant Saves $11,400 with the Right Election
Marcus is an independent IT consultant operating as a single-member LLC in California, pulling in roughly $165,000 in net profit. He came to us after his prior preparer simply filed him as a sole proprietor year after year, never raising the entity question. Marcus was paying self-employment tax on his entire profit, which worked out to roughly $23,300 before income tax even entered the picture. He assumed that was just the cost of being self-employed.
We ran the numbers and elected S Corp status by filing Form 2553, then set up a reasonable salary of $85,000 with distributions covering the remaining $80,000. Because the $80,000 distribution escaped the 15.3 percent self-employment tax, Marcus saved roughly $11,400 in his first year. He paid us $3,500 for the restructure, payroll setup, and ongoing compliance support, which gave him a first-year return of about 3.3 times his investment. Just as important, we documented his reasonable salary with market data so the election holds up under scrutiny.
Marcus is a textbook example of someone who defaulted into the wrong structure simply because nobody asked the right question. His profit level made the S Corp an obvious win, but it took a strategist to actually run it.
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.
Why Most Owners Choose the Wrong Entity
The single biggest mistake I see is treating this as a one-time decision made at formation and never revisited. Your entity should match your profit level and your goals, and both of those change over time. A business that made sense as a plain LLC at $45,000 in profit is leaving money on the table at $150,000.
The second mistake is the DIY S Corp election with no payroll. Owners read online that an S Corp saves on self-employment tax, file Form 2553, and then take all their money as distributions with zero salary. The IRS explicitly watches for this. Paying yourself an unreasonably low salary, or none at all, is one of the most common triggers for reclassification and penalties.
Red Flag Alert: If you elect S Corp status and pay yourself nothing while taking $120,000 in distributions, you are not saving on taxes, you are building an audit case against yourself. Always pay a defensible, market-based salary.
What Is a Reasonable Salary for an S Corp?
A reasonable salary is what you would pay someone else to do your job. The IRS does not publish a magic formula, but they look at your role, your experience, comparable wages in your industry, and the time you spend in the business. According to IRS guidance on S Corporation compensation, officers who perform services must be treated as employees and paid reasonable wages.
A common practical approach is the 60/40 split, where roughly 60 percent of your take is salary and 40 percent is distribution, though this varies by industry and profit level. The key is documentation: keep records of comparable salaries so you can defend your number if questioned.
Do I Pay California Taxes Differently as an S Corp?
Yes, and this trips up a lot of people. California does not fully recognize the federal S Corp pass-through benefit. For the 2026 tax year, California charges S Corps a 1.5 percent franchise tax on net income, with an $800 annual minimum. So while you save on federal self-employment tax, you still owe that state-level franchise tax. A C Corp in California pays an 8.84 percent corporate tax rate. This is exactly why California owners need to model both federal and state impact together rather than looking at federal alone.
This information is current as of 10/3/2026. Tax laws change frequently. Verify updates with the IRS or FTB if reading this later.
Can I Switch Between S Corp and C Corp Later?
You can, but timing and consequences matter. Moving from C Corp to S Corp can trigger built-in gains tax on appreciated assets if you sell them within five years. Moving from S Corp to C Corp is generally simpler but revoking the election comes with a five-year wait before you can re-elect S Corp status without IRS consent. The lesson is that these are not casual flips. Each change should be modeled before you file anything.
Ready to Reduce Your Tax Bill?
KDA Inc. specializes in strategic tax planning for business owners, S Corps, LLCs, and high-net-worth individuals. Book a personalized consultation and walk away with a clear plan.
Frequently Asked Questions
Can an LLC be taxed as an S Corp or C Corp?
Yes. An LLC is a legal structure, and you can elect to have it taxed as either an S Corp (Form 2553) or a C Corp (Form 8832). This gives you legal flexibility while choosing the tax treatment that saves the most.
At what profit level does an S Corp make sense?
As a general rule, once your net profit consistently clears $60,000, the self-employment tax savings usually outweigh the added payroll and compliance costs. Below that, a plain LLC is often simpler and nearly as efficient.
Does a C Corp always mean double taxation?
Only if you distribute dividends. If you reinvest profits into the business or pay yourself a salary that the company deducts, you can manage or defer the second layer of tax. That is why growth-focused companies often tolerate the C Corp structure.
Book Your Entity Strategy Session
If you are guessing whether an S Corp or C Corp is costing you thousands in unnecessary tax, stop guessing. Our strategy team will model both structures against your exact profit and goals, show you the dollar difference, and handle the election and payroll setup so it holds up to IRS scrutiny. Click here to book your consultation now.
