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A plain-language guide

Which business structure is right for you?

Your entity choice quietly shapes how much tax you pay, what you're personally on the hook for, and how easily you can grow. This guide walks through each option in everyday language — what it is, who it fits, and what California asks of you — so you come to the table already informed.

Start here

Four things your structure decides for you.

There's no single "best" entity — only the one that best fits your owners, your profit, and your risk. Before the labels, it helps to see what's actually at stake in the choice.

Liability

Whether your home and savings are shielded if the business is sued or can't pay its debts.

Taxes

How profit is taxed — once on your return, or twice — and how much self-employment tax you owe.

Raising capital

How easily you can bring on investors or partners, and issue ownership to them.

Upkeep

The filings, fees, payroll, and recordkeeping you take on each year to stay in good standing.

Decision guide

Follow the questions to a starting point.

A simplified path based on the questions we actually ask. It points you toward a likely fit — the final call always comes after we run your numbers.

Start
How many owners will the business have?
Just me
Do you want to shield your personal assets?
No, keep it simple
Sole Proprietor
Yes, protect me
Single-member LLC
Two or more
Are some owners passive investors?
Yes, silent partners
Limited Partnership
No, all hands-on
General Partnership or LLC
Then ask
Is profit consistently above ~$80k and you want to cut self-employment tax?
If yes, your LLC or corporation can elect S-Corp tax treatment to split salary and distributions.
Or ask
Raising venture capital or reinvesting profits to scale?
A C-Corporation fits outside investors and retained earnings — at the cost of double taxation.

Decision logic adapted from CNE's intake framework and Spidell's California tax guidance. Illustrative only — not a recommendation for your situation.

Three kinds of tax

Self-employment tax isn't the same as income tax.

This trips up almost every new owner. The same dollar of profit can be touched by three separate taxes — and they don't work the same way or fund the same things. Self-employment tax is the one most people don't see coming, because as an employee it was quietly split with your employer.

$1 of business profit
can be reached by all three of these at once — they stack, they aren't a choice between one or another.
Federal income tax
Collected by the IRS

A sliding scale — rates climb in brackets as your total income rises. It's based on all your income together, after deductions like the QBI deduction.

10–37% by bracket
California income tax
Collected by the FTB

California's own sliding scale, on top of federal. Same idea — higher income, higher rate — but it goes to the state, not Washington.

1–13.3% by bracket
Self-employment tax
Social Security + Medicare

A flat rate, not a bracket. It funds your Social Security and Medicare — the part an employer normally pays half of. Self-employed, you cover both halves.

15.3% flat

Income tax asks "how much did you make?"

Federal and state income taxes look at your total income and rise in steps. Earn more, and the next dollars are taxed at a higher rate. Deductions and credits can lower the bill.

SE tax asks "did you work for it?"

Self-employment tax is a flat 15.3% on your earnings from work, no matter your bracket. It replaces the Social Security and Medicare taxes a W-2 job splits with your employer — which is exactly the tax an S-Corp can help you reduce.

Rates shown are current statutory ranges, rounded; SE tax applies up to the annual Social Security wage base, with the Medicare portion continuing above it. Sources: IRS, California Franchise Tax Board.

See it stack up

Same $150,000 — but one of them pays the tax twice.

A salaried employee and a self-employed sole proprietor each earn $150,000. They owe similar income tax — but the employee splits Social Security and Medicare with their employer, while the self-employed owner carries both halves alone. That extra layer is what an S-Corp election is built to shrink.

Federal income tax
California income tax
Social Security + Medicare
Employed by a company
W-2 salary · $150,000

Pays only half of Social Security & Medicare — the employer pays the other half.

$25,500
$10,100
$11,475
Your total tax
$47,075
about 31% of pay
Payroll tax is your 7.65% half only.
Self-employed
Sole proprietor · $150,000 profit

Carries the full 15.3% self-employment tax — both halves, alone.

$17,000
$9,100
$21,200
Your total tax
$47,300
about 32% of profit
Self-employment tax is nearly 2× the employee's payroll share.

Notice the income taxes land close — the real gap is that $21,200 of self-employment tax versus the employee's $11,475. An S-Corp election lets a qualifying owner pay themselves a reasonable salary and take the rest as distributions — trimming that self-employment layer, which is exactly where the savings come from.

Why your tax bill feels so much bigger — even when it isn't.

The sticker shock most new business owners and self-employed individuals feel at year-end usually isn't because they owe dramatically more than an employee. It's about timing.

As an employee, your company quietly withholds tax from every paycheck — roughly 26 small payments a year if you're paid every two weeks. You never see that money, so you never feel it leave. When you're self-employed, no one withholds for you. Wait until April to pay it all at once, and the very same tax bill lands as one giant number — which is exactly why it feels enormous. The fix is quarterly estimated payments, so your tax is spread across the year the way a paycheck would.

Illustrative only — single filer, California, standard deduction; self-employed figures reflect the ½ SE-tax and 20% QBI deductions, which lower their income tax. Your actual numbers depend on filing status, deductions, and profit. We model your real situation before recommending anything. Sources: IRS, California Franchise Tax Board.

The five structures

A closer look at each one.

Sole Proprietor
The default when one person runs a business without forming an entity.

Easiest and cheapest to run — your business income simply flows onto your personal return. The trade-off is that there's no legal line between you and the business: its debts and lawsuits reach your personal assets, and all profit is hit with self-employment tax.

Why owners choose it
  • No formation paperwork or state fee
  • Simplest possible taxes (Schedule C)
  • Full, direct control
Watch-outs
  • Unlimited personal liability
  • SE tax on 100% of profit
  • Harder to bring on partners or investors
Partnerships
General (GP) and Limited (LP) — for two or more owners.

A general partnership forms automatically when two people do business together — easy, but every partner carries unlimited liability and pays SE tax on their share. A limited partnership adds passive investors whose liability is capped at what they put in and who owe no SE tax on their returns — ideal when you need capital without giving up control.

General Partnership
  • No state filing; written agreement strongly advised
  • Equal say unless the agreement differs
  • All partners: unlimited liability + SE tax
Limited Partnership
  • File LP-1 ($70); $800 CA minimum tax
  • Limited partners: capped liability, no SE tax
  • Limited partners can't run day-to-day
LLC
The flexible middle ground — liability protection without corporate rigidity.

An LLC gives you a real legal shield between business and personal assets, while staying simple to run. By default it's taxed as a pass-through, but it can elect to be taxed as an S-Corp once profits justify it — which is exactly why so many growing businesses start here and convert later.

A key point

An LLC is only a legal entity, not a tax entity. A single-owner LLC is taxed as a sole proprietorship; an LLC with two or more owners is taxed as a partnership. Forming an LLC changes your liability protection — not how much you pay the IRS.

Why owners choose it
  • Personal-asset protection
  • Flexible management and ownership
  • Can elect S-Corp tax treatment later
Watch-outs
  • $800 CA minimum + gross-receipts fee
  • Managing members pay SE tax by default
  • Must keep up the Statement of Information
S-Corporation
A tax election, not a different company — the most common way to cut SE tax.

An S-Corp lets you pay yourself a reasonable salary (subject to payroll tax) and take the rest as distributions that escape self-employment tax. On solid profit that split saves real money every year — but it adds payroll, a separate return, and IRS scrutiny of your salary, so the savings have to clear those costs first.

Why owners choose it
  • SE tax only on salary, not distributions
  • Pass-through — no corporate-level federal tax
  • May pair with CA's pass-through entity tax
Watch-outs
  • Greater of $800 or 1.5% CA tax on net income
  • Must run payroll + file Form 1120-S / 100S
  • "Reasonable" salary must hold up to the IRS
C-Corporation
Built for outside investment, equity, and serious scale.

A C-Corp is its own taxpayer, which makes it the structure venture investors expect and the natural home for profits you plan to reinvest rather than take home. The well-known cost is double taxation — the company pays tax on profit, then shareholders pay again on dividends — so it earns its keep mainly at scale or when raising equity.

Why owners choose it
  • Easiest structure for VC and equity grants
  • Unlimited shareholders, multiple stock classes
  • Profits can stay in the company to grow
Watch-outs
  • Double taxation on distributed profit
  • $800 min + 8.84% CA corporate tax
  • Most formalities and recordkeeping
Cost & complexity

The two rise together.

As you move toward stronger protection and bigger tax savings, the price tag and the paperwork climb with them. The trick is matching the structure to where your business actually is.

Sole Proprietor
Cost
Complexity

No filing, no entity fee — just a Schedule C.

General Partnership
Cost
Complexity

No state fee, but a Form 1065 and K-1s.

LLC
Cost
Complexity

$800 minimum plus a gross-receipts fee; light upkeep.

S-Corporation
Cost
Complexity

Payroll, a separate return, reasonable-salary rules.

C-Corporation
Cost
Complexity

Corporate return, double taxation, formal governance.

Simpler & cheaper
Costlier & more complex

Relative ratings, not exact figures — meant to show the trend. The right level of cost and complexity is the one your income and goals justify.

How S-Corp savings work

Where the self-employment tax savings come from.

Self-employment tax (about 15.3%) is the big lever. As a sole proprietor it hits all your profit. As an S-Corp it only hits the salary you pay yourself — the distributions ride free. Here's the same $150,000 profit, two ways.

Sole Proprietor
$150,000 profit · all of it is self-employment income
Subject to ~15.3% SE tax
$150,000
Approx. SE tax ≈ $21,200
S-Corporation
$150,000 profit · split into salary + distribution
Salary — SE/payroll tax applies
$60,000
Distribution — no SE tax
$90,000
Approx. SE/payroll tax ≈ $9,200
≈ $12,000
illustrative annual SE-tax savings on this example — before the added cost of payroll, a separate return, and bookkeeping. Net savings is what's left after those costs, which is exactly what we calculate for you.

Simplified illustration for explanation only. Real numbers depend on a reasonable-salary study, payroll costs, state tax, and your full return. Sources for SE-tax mechanics: IRS, AICPA.

The QBI deduction

Many pass-through owners can deduct up to 20% of qualified business income under Section 199A. It applies to sole props, partnerships, LLCs, and S-Corps alike — but income limits, your profession, and how much salary an S-Corp pays all change the math. It's a key part of comparing structures, not an afterthought.

California's Pass-Through Entity Tax

Under AB 150, partnerships and S-Corps can elect to pay California tax at the entity level (9.3%) and pass owners a matching state credit — a legal way to work around the federal SALT cap and reduce federal tax. It's one of the bigger recent planning opportunities for California owners.

California specifics

What the state expects, on what schedule.

California adds its own filings and the $800 minimum franchise tax on top of federal rules. Missing these is where good-standing problems and penalties usually start.

When
What's due
March 15
S-Corp & partnership returns — Form 1120-S / 100S and 1065 / 565 — with Schedule K-1s to every owner.
April 15
$800 minimum franchise tax and federal/state estimated payments for owners.
Quarterly
Estimated tax payments, payroll-tax deposits, and CA payroll filings (DE-9 / DE-9C) for S-Corps with employees.
Annual / biennial
Statement of Information with the Secretary of State, annual meeting minutes, and updated corporate records.
LLCs only · in addition to the $800 minimum

California charges LLCs an extra fee based on income.

Beyond the $800 minimum franchise tax every entity pays, an LLC owes a separate gross-receipts fee once its total California income clears $250,000. It's tied to revenue — not profit — so it applies even in a low-margin year. Plan for it as your top line grows.

Total California income
Annual LLC fee
Under $250,000
$0 (just the $800 minimum)
$250,000 – $499,999
$900
$500,000 – $999,999
$2,500
$1,000,000 – $4,999,999
$6,000
$5,000,000 and above
$11,790

Calendar-year filers; dates shift for fiscal years and weekends/holidays. The LLC fee tiers are based on total California source income and apply on top of the $800 minimum. Confirm current deadlines and fee amounts with the IRS, FTB, and EDD each year.

Compare at a glance

The five structures, side by side.

Entity How it's formed CA annual tax How profit is taxed Self-employment tax Best for
Sole Proprietor No state filing; just a local business license / DBA None (no entity fee) Once, on your personal return (Schedule C) Yes — on all net income Single-owner, low-risk businesses
General Partnership No filing; operate via a written agreement None (no entity fee) Pass-through to partners (Form 1065 → K-1) Yes — on each partner's share Trusted, hands-on co-owners
Limited Partnership File Form LP-1 ($70) with CA Secretary of State $800 minimum Pass-through (Form 1065) GP: yes · Limited partners: no Raising capital from passive investors
LLC Articles of Organization + Statement of Information $800 min + fee tiered by gross receipts Pass-through by default (Form 568), or elect S-Corp Managing members: yes (unless S-elected) Flexible liability protection
S-Corporation Incorporate + file IRS Form 2553 to elect Greater of $800 or 1.5% of net income Pass-through via K-1; salary + distributions Only on reasonable salary — not on distributions Profitable owners cutting SE tax
C-Corporation Incorporate with CA and IRS filings $800 min + 8.84% corporate tax Taxed at the entity, then again on dividends (double) No SE tax; payroll taxes on wages Scaling, outside investors, reinvestment

Figures reflect current California rules and are rounded for clarity. Sources: IRS, California Franchise Tax Board, CA Secretary of State, and Spidell. Verify thresholds for your year before acting.

Drawn from trusted sources
IRS California Franchise Tax Board CA Secretary of State AICPA Bloomberg Tax Thomson Reuters Spidell

This guide is general educational information about California business entities, not legal or tax advice. Rules, rates, and thresholds change and apply differently to every business — please talk with us before acting on anything here.

Still weighing your options? Let's run your numbers.

Reading about the structures gets you part of the way — the right answer comes from your actual profit, owners, and goals. We'll model it and recommend the structure that keeps the most in your pocket.

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