A business owner in Riverside made $200,000 last year and paid $56,400 in combined federal and California taxes. Another business owner in Sacramento made the exact same amount and paid $14,200 less. Same income. Same state. Same industry. The only difference was three letters on a single IRS form. That is what happens when you get the LLC vs S-Corp vs C-Corp explained correctly before you file, not after.

The entity you choose is not a formality. It is the single most consequential tax decision most California business owners will ever make. Choose wrong, and you will overpay by five figures every single year until someone catches it. Choose right, and that money stays in your business, your retirement accounts, and your family’s future.

Quick Answer

An LLC taxed as a sole proprietorship exposes all net income to the 15.3% self-employment tax. An S-Corp lets you split income between a reasonable salary (taxed) and distributions (not subject to SE tax), saving most owners $8,000 to $22,000 per year. A C-Corp pays a flat 21% federal rate but triggers double taxation when profits reach your pocket. For most California business owners earning $60,000 or more in profit, the S-Corp election delivers the lowest combined tax burden. The exceptions are narrow and specific.

What Each Entity Actually Means for Your Tax Return

Before you can pick the right structure, you need to understand what each one does to your money on April 15th. Forget the legal jargon. Here is what matters when LLC vs S-Corp vs C-Corp explained in tax terms that affect your bank account.

LLC Taxed as a Sole Proprietorship (Default)

When you form an LLC in California and do nothing else, the IRS treats it as a “disregarded entity.” That means all profit flows to your personal return on Schedule C. You pay income tax on every dollar of profit. You also pay self-employment tax on every dollar of profit. That SE tax rate is 15.3% on the first $168,600 of net earnings (for 2025) and 2.9% on everything above that threshold, per IRS self-employment tax rules.

On $150,000 in profit, you are looking at roughly $21,194 in SE tax alone, before a single dollar of income tax. California adds its own layer: up to 12.3% in state income tax plus a 1% mental health surcharge on income over $1 million. Then there is the $800 annual franchise tax and the LLC gross receipts fee, which can run from $900 to $11,790 depending on your total California-source revenue.

S-Corp (LLC or Corporation With S Election)

An S-Corp is not a separate entity type. It is a tax election filed on IRS Form 2553. You can be an LLC or a corporation and elect S-Corp status. The IRS then treats you as a pass-through entity, but with one critical difference: you split your income between a W-2 salary (which you pay to yourself) and distributions (which pass through on Schedule K-1). Only the salary portion is subject to payroll taxes. The distribution portion is not.

On that same $150,000 in profit, if you set a reasonable salary at $65,000, only $65,000 faces payroll taxes. The remaining $85,000 flows to you as a distribution, free of SE tax. That move alone saves roughly $13,005 per year. California charges a 1.5% franchise tax on S-Corp net income (minimum $800), and you lose the LLC gross receipts fee entirely when you elect S-Corp status.

C-Corp (Standard Corporation)

A C-Corp is a separate taxpaying entity. It files its own return on IRS Form 1120 and pays a flat 21% federal corporate tax rate. California adds 8.84% in corporate franchise tax. When you pull money out as dividends, you pay tax again at the individual level, at qualified dividend rates of 0%, 15%, or 20% depending on your bracket, plus the 3.8% net investment income tax if applicable.

This is double taxation. On $150,000 in corporate profit, the C-Corp pays $31,260 in federal tax (21%) and $13,260 in California franchise tax (8.84%). That leaves $105,480. If you distribute all of it as dividends, you pay another $15,822 in federal tax (15% qualified rate) and roughly $12,876 in California income tax. Total combined tax: approximately $73,218. That is a 48.8% effective rate on $150,000.

The Tax Math at Three Income Levels: Side-by-Side Comparison

Numbers settle every argument. Here is what business owners actually pay under each structure at three common California profit levels. These calculations assume single filing status, standard deduction under OBBBA ($15,750 for 2026), and no other income sources.

$80,000 Annual Profit

Tax Component	LLC (Schedule C)	S-Corp	C-Corp
Federal Income Tax	$8,236	$8,236	$16,800 (corp) + $3,784 (div)
Self-Employment / Payroll Tax	$11,304	$5,508 (on $36K salary)	$5,508 (on $36K salary)
California Income / Franchise Tax	$3,840	$3,840 + $1,200 (1.5%)	$7,072 (8.84%) + $3,840 (div)
Total Combined Tax	$23,380	$18,784	$37,004
Annual Savings vs LLC	Baseline	$4,596	($13,624 more)

$150,000 Annual Profit

Tax Component	LLC (Schedule C)	S-Corp	C-Corp
Federal Income Tax	$19,646	$19,646	$31,500 (corp) + $8,941 (div)
Self-Employment / Payroll Tax	$21,194	$9,945 (on $65K salary)	$9,945 (on $65K salary)
California Income / Franchise Tax	$9,890	$9,890 + $2,250 (1.5%)	$13,260 (8.84%) + $9,890 (div)
Total Combined Tax	$50,730	$41,731	$73,536
Annual Savings vs LLC	Baseline	$8,999	($22,806 more)

$300,000 Annual Profit

Tax Component	LLC (Schedule C)	S-Corp	C-Corp
Federal Income Tax	$51,846	$51,846	$63,000 (corp) + $20,864 (div)
Self-Employment / Payroll Tax	$34,714	$13,770 (on $90K salary)	$13,770 (on $90K salary)
California Income / Franchise Tax	$23,390	$23,390 + $4,500 (1.5%)	$26,520 (8.84%) + $23,390 (div)
Total Combined Tax	$109,950	$93,506	$147,544
Annual Savings vs LLC	Baseline	$16,444	($37,594 more)

Want to see exactly how your specific numbers break down? Run your business profit through this small business tax calculator to estimate your take-home under each entity structure.

Key Takeaway: At every income level, the S-Corp produces the lowest combined tax burden for California business owners who take a reasonable salary. The C-Corp loses to both other structures unless you qualify for specific exemptions covered below.

OBBBA Changes That Shift the Entity Calculus in 2026

The One Big Beautiful Bill Act changed several provisions that directly affect how LLC vs S-Corp vs C-Corp explained comparisons play out starting in 2026. These are not minor tweaks. They permanently alter the math.

Permanent QBI Deduction (Section 199A)

Under OBBBA, the Qualified Business Income deduction is now permanent. S-Corp and LLC owners can deduct up to 20% of their qualified business income from their taxable income. On $150,000 in profit, that is a $30,000 deduction, saving roughly $7,200 in federal taxes at the 24% bracket. C-Corp owners do not get this deduction because corporate income does not flow through to personal returns. This gap widens the S-Corp advantage over C-Corp by $5,000 to $12,000 per year depending on income. For a deeper breakdown of S-Corp strategy, see our comprehensive S-Corp tax strategy guide.

Permanent 100% Bonus Depreciation

OBBBA restored full first-year bonus depreciation for qualifying assets. This benefits all entity types federally, but California still does not conform. Under Revenue and Taxation Code Sections 17250 and 24356, California allows zero bonus depreciation. That means you will maintain dual depreciation schedules regardless of entity type. However, S-Corp owners who use the AB 150 pass-through entity elective tax can offset some of this gap at the state level.

$40,000 SALT Cap

The state and local tax deduction cap increased from $10,000 to $40,000 under OBBBA. This helps C-Corp shareholders who pay state income tax on dividends, but the benefit is marginal compared to the double taxation burden. S-Corp owners who elect into California’s AB 150 PTE tax can bypass the SALT cap entirely, generating an additional $3,000 to $15,000 in federal savings depending on income.

$2.5 Million Section 179 Limit

The expanded Section 179 limit benefits all entities that purchase qualifying equipment. However, California still caps its Section 179 deduction at $25,000. S-Corp owners who plan equipment purchases strategically can stack Section 179, AB 150, and retirement contributions to close the federal-state gap more effectively than C-Corp owners, who face 8.84% state tax on every dollar of retained earnings used for purchases.

The 4 Narrow Scenarios Where C-Corp Actually Wins

The C-Corp is not always the wrong answer. But the situations where it is the right answer are far more specific than most business owners realize. Here are the four genuine exceptions.

1. Venture Capital or Institutional Funding

Most VCs require C-Corp structure because S-Corps cannot have more than 100 shareholders, cannot issue preferred stock, and cannot have non-resident alien or entity shareholders. If you are raising institutional capital, the C-Corp is likely your only option. The tax inefficiency is the cost of access to capital.

2. Section 1202 QSBS Exclusion

Under IRC Section 1202, original shareholders of a qualified small business stock can exclude up to $10 million (or 10 times their basis) in capital gains when they sell shares held for five or more years. This is a C-Corp-only benefit. The catch: California does not conform to Section 1202, so you will still owe California capital gains tax on the full amount. For a startup founder expecting a $5 million or larger exit, the federal savings can reach $1,000,000 or more, making the C-Corp double taxation worth absorbing during the growth phase.

3. Retained Earnings Deferral Strategy

If you plan to reinvest all profits back into the business for several years without taking distributions, the C-Corp’s flat 21% federal rate is lower than the top individual rate of 37%. However, this only works if you never distribute the money. Once you pull it out, double taxation kicks in. And California’s 8.84% corporate rate is significantly higher than the 1.5% S-Corp franchise tax, so the state-level math rarely favors this approach for California businesses.

4. Multiple Stock Classes

S-Corps are limited to one class of stock. If your business needs common and preferred shares, voting and non-voting classes, or convertible instruments, you need a C-Corp structure. This is common in multi-founder startups with complex equity arrangements.

Pro Tip: If none of these four scenarios apply to your business, the C-Corp is almost certainly costing you money. The default LLC-to-S-Corp election path is the right move for the vast majority of California entity formation situations.

The 5 Costliest Entity Mistakes California Business Owners Make

Getting LLC vs S-Corp vs C-Corp explained correctly is only half the battle. The other half is avoiding the traps that cost business owners thousands even after they pick the right entity.

Mistake 1: Staying on Schedule C Past $60,000 in Profit

Every dollar of Schedule C profit above the break-even point costs you 15.3% in SE tax that an S-Corp election would eliminate. At $60,000 in profit, the S-Corp election starts saving you roughly $3,600 per year after accounting for additional payroll costs, franchise tax, and tax preparation fees. By $100,000, you are leaving $7,000 or more on the table annually. By $200,000, the gap exceeds $14,000 per year. The math is not ambiguous.

Mistake 2: Setting an Unreasonable Salary

The IRS requires S-Corp owner-employees to pay themselves a “reasonable salary” before taking distributions. Set it too low, and you invite an audit. Set it too high, and you negate the tax savings. The sweet spot depends on your industry, experience, geography, and revenue. A marketing consultant in Los Angeles making $200,000 in profit should not pay themselves $30,000 or $180,000. A defensible salary might be $75,000 to $95,000 based on comparable positions listed on the Bureau of Labor Statistics.

Mistake 3: Ignoring the Form 2553 Deadline

Form 2553 must be filed by March 15 of the tax year you want the election to take effect, or within 75 days of forming your entity. Miss that window, and you are stuck on Schedule C for the entire year. The IRS does offer late election relief under Revenue Procedure 2013-30 if you meet four requirements, but it adds complexity and delays. File on time.

Mistake 4: Choosing C-Corp Because Your Buddy Did

Entity selection is not a one-size-fits-all decision. A tech founder raising Series A funding has completely different needs than a freelance graphic designer earning $120,000. Copying someone else’s structure without running the tax math is how business owners end up paying $30,000 or more in unnecessary taxes for years before discovering the mistake.

Mistake 5: Forgetting California-Specific Costs

California layers additional taxes and fees on every entity type. The $800 minimum franchise tax applies to LLCs, S-Corps, and C-Corps. The LLC gross receipts fee (which disappears when you elect S-Corp status) can add $900 to $11,790. The 8.84% C-Corp franchise tax versus 1.5% S-Corp franchise tax creates a 7.34% gap on every dollar of net income. And California’s refusal to conform to federal bonus depreciation means you cannot write off equipment the same way on your state return, regardless of entity type.

Red Flag Alert: If you formed a California LLC more than two years ago and have never evaluated the S-Corp election, there is a strong probability you have overpaid by $10,000 or more. That is not a guess. That is what we see in client after client who walks through our door.

KDA Case Study: Sacramento Digital Agency Owner Saves $18,400 After Entity Restructure

Marcus ran a digital marketing agency in Sacramento as a single-member LLC. He had been filing Schedule C for four years, reporting $185,000 in annual profit. His total federal and California tax bill was hovering around $62,000 per year. He assumed that was just the cost of doing business in California.

When Marcus came to KDA, we ran the full entity comparison. His Schedule C was costing him $26,085 in self-employment tax alone. We filed a late S-Corp election under Revenue Procedure 2013-30, set a reasonable salary of $78,000 based on BLS data for marketing managers in the Sacramento MSA, and restructured his distributions to maximize the QBI deduction under OBBBA’s permanent Section 199A rules.

The results in year one: $14,117 in SE tax savings from the salary-distribution split, $2,380 in additional QBI deduction savings, $1,903 saved by eliminating the LLC gross receipts fee (replaced by the lower 1.5% S-Corp franchise tax), and another $3,200 captured through AB 150 PTE elective tax. Total first-year savings: $18,400. Marcus paid KDA $4,200 for the full entity restructure, tax preparation, and payroll setup, yielding a 4.4x first-year ROI with projected five-year savings of $92,000.

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.

The Decision Framework: Which Entity Is Right for You?

Stop guessing. Use this decision tree based on where your business actually stands today.

Choose LLC (Default Schedule C) If:

• Your annual profit is below $40,000
• You are testing a business idea and want maximum simplicity
• You have significant net losses you need to deduct against other income
• You are in year one and payroll costs would eat your margins

Choose S-Corp Election If:

• Your annual profit exceeds $60,000
• You can justify and document a reasonable salary
• You want to eliminate SE tax on distributions
• You are willing to run payroll (even if it is just for yourself)
• You do not need multiple stock classes or more than 100 shareholders
• You want access to the AB 150 PTE elective tax for SALT cap relief

Choose C-Corp If:

• You are raising venture capital or institutional investment
• You qualify for and plan to use the Section 1202 QSBS exclusion
• You will retain all earnings for 3 or more years without distributions
• You need multiple stock classes for complex equity arrangements

Key Takeaway: For roughly 85% of California business owners earning $60,000 or more, the S-Corp election produces the lowest combined federal and state tax burden. The remaining 15% have specific circumstances that justify a C-Corp or staying on Schedule C.

How to Make the Switch: Step-by-Step

If you already have an LLC and want to elect S-Corp status, here is the exact process.

1. Verify eligibility under IRC Section 1361: U.S. entity, 100 or fewer shareholders, one class of stock, no ineligible shareholders (partnerships, corporations, non-resident aliens)
2. File Form 2553 with the IRS by March 15 of the tax year you want the election effective, or within 75 days of formation
3. Obtain a new EIN if the IRS requires it for payroll purposes (not always necessary, but sometimes triggered by the election change)
4. Set up payroll and register with the California Employment Development Department (EDD) for withholding, unemployment insurance, and state disability insurance
5. Establish a reasonable salary supported by industry data, geographic comparisons, and revenue-to-salary ratios
6. File California Form 100S for the S-Corp franchise tax return and consider electing into AB 150 PTE tax
7. Update your operating agreement to reflect the S-Corp election and any distribution policies
8. Set quarterly estimated tax payments based on the new structure to avoid underpayment penalties

This process typically takes 30 to 60 days when handled by a professional. DIY attempts frequently result in missed deadlines, payroll registration errors, or salary documentation gaps that create audit exposure.

Frequently Asked Questions

Can I Switch From C-Corp to S-Corp Mid-Year?

No. The S-Corp election on Form 2553 must be filed by March 15 to be effective for the current tax year. If you miss that deadline, you can file for the following year. Late election relief under Revenue Procedure 2013-30 is available in limited circumstances, but it is not guaranteed.

Do I Lose My LLC Liability Protection With an S-Corp Election?

No. The S-Corp election is a tax classification only. Your LLC remains intact as a legal entity, and your personal liability protection stays the same. You are simply changing how the IRS taxes the income that flows through the LLC.

What If My S-Corp Has a Loss? Can I Deduct It?

Yes, but only up to your stock and debt basis in the S-Corp, per IRC Section 1366. Losses exceeding your basis are suspended and carried forward. This is different from a Schedule C loss, which has no basis limitation (though it is still subject to the excess business loss rules under Section 461(l)).

Does the QBI Deduction Apply to C-Corp Income?

No. The Section 199A QBI deduction applies only to pass-through income from S-Corps, partnerships, and sole proprietorships. C-Corp income is taxed at the entity level and does not qualify. This is one of the largest structural disadvantages of the C-Corp for small business owners under OBBBA’s permanent rules.

Will This Trigger an Audit?

The entity election itself does not trigger an audit. However, S-Corp owners who set unreasonably low salaries do attract IRS scrutiny. The IRS looks at salary-to-distribution ratios, industry benchmarks, and revenue levels. As long as your salary is defensible and documented, the election reduces your audit risk by ensuring cleaner, more structured reporting.

This information is current as of April 2, 2026. Tax laws change frequently. Verify updates with the IRS or FTB if reading this later.

Book Your Entity Strategy Session

If you are still operating as a default LLC and watching five figures disappear to self-employment taxes every year, that is a problem with a clear fix. Whether you need to evaluate the S-Corp election, confirm your C-Corp is still the right fit, or restructure an entity that was set up wrong from the start, our strategy team will run the full comparison and give you a definitive answer backed by real numbers. Click here to book your entity strategy consultation now.

“The IRS does not penalize you for choosing the right entity. It penalizes you for never checking whether your current one is costing you money.”