Most California business owners pick their entity the same way they pick a phone plan: they ask a friend, hear “an LLC is easiest,” and file the paperwork without ever running the numbers. That single decision can quietly cost you $8,000 to $20,000 a year in taxes you never needed to pay. The real question is not whether an LLC sounds simple. The real question is whether an LLC, S Corp, or C Corp gives you the lowest total tax bill for the profit you actually earn.

Here is the truth almost nobody explains clearly: the LLC, the S Corp, and the C Corp are not three competing products. An LLC is a legal wrapper. An S Corp and a C Corp are tax elections. You can be an LLC that is taxed as an S Corp. That distinction is where most of the confusion and most of the overpaid tax lives. Let’s break it down so you can make the call with actual dollar figures instead of guesswork.

Quick Answer: Deciding Between an LLC, S Corp, or C Corp

For most California small business owners earning under $50,000 in net profit, a plain LLC taxed as a sole proprietorship keeps things simple and cheap. Once your net profit clears roughly $60,000 to $80,000, electing S Corp status usually saves thousands in self-employment tax. A C Corp rarely wins for a small operating business because of double taxation, but it becomes powerful when you are raising venture capital, issuing stock, or reinvesting heavily instead of paying yourself.

That is the short version. The rest of this guide shows you the math, the traps, and the exact forms so you can stop overpaying. For a full breakdown of how to structure and run an S Corp in this state, see our complete guide, The Complete Guide to S Corp Tax Strategy in California.

What Each Structure Actually Is (In Plain English)

Before you can decide whether an LLC, S Corp, or C Corp fits you, you need to understand what each one really does. People treat them like three flavors of the same thing. They are not.

The LLC: A Legal Shield, Not a Tax Rule

An LLC (Limited Liability Company) is a legal structure created at the state level. In plain English, it puts a wall between your personal assets and your business liabilities. If the business gets sued, your house and personal savings are generally protected.

Here is the part that shocks people: the IRS does not have an “LLC” tax category. By default, a single-owner LLC is taxed as a sole proprietorship, and a multi-owner LLC is taxed as a partnership. All the profit flows straight to your personal return, and you pay ordinary income tax plus self-employment tax on every dollar of it.

The S Corp: An Election That Cuts Self-Employment Tax

An S Corp is not a separate kind of company you form. It is a tax election you make by filing IRS Form 2553. An LLC or a corporation can elect to be taxed as an S Corp. The magic is this: an S Corp lets you split your income into two buckets, a reasonable salary (subject to payroll taxes) and distributions (not subject to the 15.3% self-employment tax).

The C Corp: The Default Corporation With Double Taxation

A C Corp is the standard corporation. It is a completely separate taxpayer that files its own return (Form 1120) and pays the flat 21% federal corporate rate. The catch is double taxation. The corporation pays tax on its profit, then you pay tax again on any dividends you take personally. For a small operating business, that double hit usually erases any benefit.

If you are a growing operator trying to weigh these options against your day-to-day reality, our resources for business owners walk through how each structure plays out for real companies at different revenue levels.

LLC vs S Corp vs C Corp: The Side-by-Side Comparison

Numbers make the choice obvious. Here is how the three stack up on the factors that actually move your tax bill.

Factor	LLC (default)	S Corp	C Corp
Self-Employment Tax	On all net profit	Only on salary	None on distributions
Federal Income Tax	Personal rates	Personal rates	Flat 21% corporate
Double Taxation	No	No	Yes
Payroll Required	No	Yes	Yes
CA Franchise Tax	$800 minimum	$800 or 1.5% of net	$800 or 8.84% of net
Best For	Under $50K profit	$60K to $500K profit	VC-backed or reinvesting

Notice the California-specific rows. Many national blogs skip these entirely, and that is exactly where California owners get surprised. An S Corp here pays a 1.5% franchise tax on net income (with an $800 minimum), while a C Corp pays 8.84%. That state layer matters when you run your real numbers.

The Self-Employment Tax Math That Changes Everything

This is the single most important section for deciding whether to stay an LLC or elect S Corp status. Self-employment tax is 15.3% covering Social Security and Medicare. On a plain LLC, you pay it on every dollar of net profit. That is the leak most owners never see.

A Real Example With Real Dollars

Say your business nets $120,000 in profit for the 2025 tax year.

• As a default LLC: You pay self-employment tax on roughly the full $120,000. After the standard adjustment, that is about $16,955 in SE tax alone, on top of income tax.
• As an S Corp: You pay yourself a reasonable salary of, say, $70,000. Payroll taxes apply only to that $70,000, costing about $10,710. The remaining $50,000 comes out as a distribution with zero self-employment tax.

The difference is roughly $6,245 saved in a single year, before factoring in the deductible employer payroll cost. That is not a rounding error. That is a vacation, a hire, or a retirement contribution.

Pro Tip: Want to see your own crossover point? Run your business profit through the small business tax calculator to estimate the savings before you commit to an election.

Why the “Reasonable Salary” Rule Matters

The IRS requires S Corp owners to pay themselves a reasonable salary for the work they do. You cannot pay yourself $10,000 and take $110,000 in distributions to dodge payroll tax. According to IRS guidance on S corporation compensation, unreasonably low salaries are a top audit trigger. The fix is simple: base your salary on what a comparable role pays in your industry and region.

Why Most Business Owners Choose the Wrong Structure

Here is the mistake that costs the most money: owners stay a default LLC for years out of inertia, long after their profit crossed the threshold where an S Corp election would pay for itself many times over.

Why does it happen? Three reasons. First, they heard “S Corps are complicated” and stopped there. Second, they fear payroll. Third, nobody ever ran their specific numbers. The reality is that the added cost of payroll and a corporate return, usually $1,500 to $3,000 a year, is dwarfed by the tax savings once profit is high enough.

The opposite mistake also happens. Owners rush to form a C Corp because they read that the 21% corporate rate sounds low. Then they take money out, get taxed again on dividends, and end up worse off than a simple LLC. The 21% rate only helps if you leave the money in the company to grow.

Red Flag Alert: If you elected S Corp status but never actually ran payroll or filed Form 1120-S, you are exposed. The IRS can reclassify your distributions as wages and hit you with back payroll taxes and penalties. An election without proper operation is worse than no election at all.

KDA Case Study: Consultant Saves $9,400 by Switching From LLC to S Corp

Marcus, a Sacramento-based marketing consultant, ran his business as a single-member LLC taxed as a sole proprietorship. He was netting about $145,000 a year and paying self-employment tax on nearly all of it. When he came to KDA, he assumed his structure was “fine” because his prior preparer never flagged it.

We ran his numbers and found he was leaking money every quarter. We elected S Corp status for his existing LLC by filing Form 2553, set his reasonable salary at $80,000 based on regional consulting compensation data, and structured the remaining $65,000 as distributions. We also set up compliant payroll so the salary would hold up under scrutiny.

The result for his first full year as an S Corp: about $9,400 in self-employment tax savings. His total cost for the restructure, payroll setup, and corporate return preparation was roughly $3,200. That is a first-year return of nearly 2.9x, and the savings repeat every year going forward. Marcus also gained a cleaner set of books that made his quarterly planning far simpler.

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.

When a C Corp Actually Makes Sense

C Corps get a bad reputation for small businesses, and deservedly so in most cases. But there are specific situations where the C Corp wins decisively.

You Are Raising Venture Capital

Investors and venture funds generally require a Delaware C Corp. S Corps have strict ownership rules that block many institutional investors, and they cannot have more than 100 shareholders or issue multiple classes of stock the way funding rounds demand.

You Are Reinvesting, Not Distributing

If you plan to plow profit back into the company rather than pay yourself, the flat 21% federal rate can beat top personal rates. Since you are not taking dividends, you avoid the second layer of tax while the business grows.

You Want QSBS Treatment

Qualified Small Business Stock (QSBS) can let founders exclude a large portion of capital gains when they eventually sell, but only C Corp stock qualifies. For a startup aiming at a big exit, this alone can justify the structure.

How Do I Actually Elect S Corp Status?

If the math points toward an S Corp, here is the step-by-step process so you know exactly what to do.

1. Confirm you have an entity. You need an existing LLC or corporation first. You cannot elect S Corp status as a sole proprietor without forming an entity.
2. Get your EIN. If you do not already 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 entity, file within 2 months and 15 days of formation. For an existing entity, file by March 15 to take effect for the current tax year.
4. Set up payroll. Establish a reasonable salary and run payroll with proper withholding. This is non-negotiable for an S Corp.
5. File Form 1120-S annually. This is the S Corp income tax return, due March 15. Each owner also receives a Schedule K-1 reporting their share of income.

Getting the entity foundation right is where most DIY attempts fall apart. Our entity formation services handle the filings, the election timing, and the payroll setup so the structure actually holds up.

Do I Still Pay the California $800 Franchise Tax?

Yes. This trips up almost every new California owner. Whether you are an LLC, an S Corp, or a C Corp, California charges a minimum $800 annual franchise tax through the Franchise Tax Board. LLCs pay it via Form 3522. There is a first-year exemption for certain new corporations, but do not assume it applies to you without checking. The $800 is a floor, not a ceiling, and higher-income entities pay more based on the percentages in the comparison table above.

What If My Profit Fluctuates Year to Year?

Entity choice is not permanent, but it is not something to flip yearly on a whim either. If your profit swings widely, look at your average over two or three years rather than one spike. A single strong year does not always justify an S Corp election if you expect to drop back down. On the other hand, if you have crossed the threshold and expect to stay there, waiting costs you real money every quarter you delay.

Common Mistakes That Trigger Problems

Whichever structure you choose, avoid these traps that we see constantly.

• Paying yourself no salary as an S Corp owner. This is the fastest way to draw IRS attention and get distributions reclassified as wages.
• Missing the Form 2553 deadline. Miss it and you stay a default LLC or C Corp for the whole year, losing the savings until next year.
• Forgetting the California franchise tax. Skipping the $800 payment leads to penalties and suspension of your entity.
• Choosing a C Corp for a lifestyle business. If you take the profit out to live on, double taxation makes this the worst choice for most owners.
• Never revisiting the decision. The structure that fit at $40,000 in profit is rarely the right one at $200,000.

Frequently Asked Questions

Can I switch from an LLC to an S Corp later?

Yes. You keep your LLC and simply file Form 2553 to elect S Corp taxation. Your legal entity does not change, only how the IRS taxes it. Most owners do exactly this once their profit justifies it.

Does an S Corp save on state taxes too?

Partly. In California, an S Corp pays a 1.5% franchise tax on net income (minimum $800), which is far lower than the 8.84% a C Corp pays. But the biggest savings come from avoiding federal self-employment tax on distributions, not from the state layer.

How much profit do I need before an S Corp is worth it?

As a rule of thumb, once your net profit consistently exceeds $60,000 to $80,000, the self-employment tax savings usually outweigh the added cost of payroll and a corporate return. Below that, the extra complexity often is not worth it.

What tax year does this apply to?

The rates and thresholds referenced here apply to the 2025 tax year. Franchise tax rules are governed by the California Franchise Tax Board, and federal rules by the IRS.

This information is current as of July 24, 2026. Tax laws change frequently. Verify updates with the IRS or FTB if reading this later.

The Bottom Line on Your Entity Choice

Your entity is not a set-it-and-forget-it decision. It is a lever you pull based on how much you actually earn. A plain LLC keeps early-stage life simple. An S Corp election is the workhorse that saves most profitable California owners thousands every year. A C Corp is a specialized tool for raising capital or reinvesting, not a default. The worst thing you can do is nothing, because inertia has a price and it shows up on every tax return.

The IRS is not hiding these savings. You simply were never shown how to run the numbers for your specific situation.

Book Your Entity Strategy Session

If you are still guessing whether an LLC, S Corp, or C Corp is costing you thousands, stop guessing and get the math. Our strategy team will run your exact profit numbers, model each structure side by side, and show you the precise annual savings and the steps to capture them. Click here to book your consultation now.