Which Business Entity Should I Form? LLC vs S-Corp vs C-Corp (2026)

The question every first-time founder eventually asks: "Should I form an LLC, an S-Corp, or a C-Corp?" The internet's answer is usually a confused mix of tax jargon, wrong assumptions, and template advice designed to sell you an incorporation service.

Here is the actual answer, structured as a decision framework rather than a comparison chart. It will not tell you which entity is "best" — because there isn't one. It will tell you which entity fits your specific situation, why, and what the real tradeoffs look like.

The four entities that actually matter

For 95% of new US businesses, the choice comes down to four entity structures. Everything else (LLLPs, series LLCs, cooperatives, etc.) is a variant or an edge case.

1. Sole Proprietorship — the default when you just start doing business under your own name. No formation required, no separation between you and the business, unlimited personal liability. Almost never the right choice for anything beyond a hobby generating pocket money.

2. Single-Member LLC — the default for solo owner-operators. Limited liability protection, pass-through taxation (profits/losses flow to your personal return), minimal ongoing compliance. Usually the right starting point for solo founders.

3. Multi-Member LLC — the default when there are two or more owners. Same benefits as single-member LLC but requires a properly drafted operating agreement to govern how the members interact (see Operating Agreements & LLC Governance).

4. Corporation (C-Corp or S-Corp) — a distinct legal entity that files its own tax return. The two flavors (C vs S) refer to the tax election, not the underlying entity structure. Corporations make sense when the business will raise venture capital, issue formal stock options, or specifically want C-Corp tax treatment for growth/reinvestment.

The decision framework

Instead of comparing all four side-by-side, work through the following questions in order. Each answer narrows the field.

Q1: Will you raise venture capital, or issue formal stock options to employees?

If yes → C-Corporation. Every institutional VC investor and every serious startup employee stock option plan assumes C-Corp structure. LLCs and S-Corps create tax and structural complications that professional investors won't accept.

If no → continue.

Q2: Are there two or more owners?

If yes → Multi-Member LLC (or in some cases, an LLC with S-Corp election if there are 2-100 US-person owners). Multi-owner situations require a well-drafted operating agreement regardless of entity choice.

If no → continue.

Q3: Is your net income (after paying yourself a reasonable salary) likely to exceed roughly $60K-$80K per year?

If yes → LLC with S-Corp Election. The S-Corp election lets you split income between salary (subject to self-employment/payroll tax) and distributions (not subject to self-employment tax). At certain income levels, the tax savings become material. Below that threshold, the added compliance cost (running payroll, filing a separate 1120-S return) usually eats the savings.

If no → Single-Member LLC. Simple pass-through taxation, minimal compliance, easy to convert later if income grows.

That's the framework for 90% of new businesses. Now the details that matter.

LLC vs C-Corp: the tax difference that actually matters

LLC (default pass-through): Business profits flow to your personal tax return. You pay individual income tax on all business net income at your marginal rate. If the business earns $200K, you pay tax on $200K whether you actually take the money out or leave it in the business.

C-Corp: The corporation pays corporate income tax (currently 21% federal) on its net income. Then when the corporation distributes profits to shareholders as dividends, the shareholders pay individual tax on the dividends (up to 23.8% including net investment income tax). That's "double taxation" — the same dollar of profit gets taxed twice.

But — if the C-Corp retains its profits to reinvest in growth (rather than distributing them), you avoid the second tax layer. This is why growth-stage startups and reinvestment-heavy businesses often choose C-Corp: the retained earnings only get taxed once (at 21%) instead of once (at your ~37% top marginal rate as pass-through).

The rule of thumb: if you plan to reinvest most of the profits into the business (product development, hiring, expansion), C-Corp math often wins. If you plan to distribute most of the profits to yourself annually, LLC pass-through usually wins.

S-Corp election: when it helps

An "S-Corp" isn't a separate entity type — it's a tax election you can make on either an LLC or a Corporation. The election changes how the entity is taxed:

• Instead of paying self-employment tax on all net income (15.3% on the first $168K of 2025 wages), owners pay themselves a "reasonable salary" (subject to payroll taxes) and take remaining profits as distributions (not subject to self-employment tax)
• The IRS requires the salary to be "reasonable" for the work performed — you cannot pay yourself $10K salary and take $200K in distributions to avoid all payroll tax
• The compliance overhead is real: separate 1120-S tax return, payroll processing, quarterly filings

When S-Corp election makes sense: - Net income (after reasonable salary) reliably exceeds $60K-$80K - The business is stable enough to justify the compliance overhead - You (or your accountant) will maintain the payroll and filing discipline

When S-Corp election doesn't help: - Business is inconsistent (some years high income, some years low) - Net income is below $60K after reasonable salary - You want maximum simplicity and are willing to trade some tax savings for less administrative burden

Model the specific breakeven for your situation. On $150K of net business income, S-Corp election can save $6K-$10K annually. On $500K of net business income, savings can be $20K+. But at $50K of net income, the S-Corp compliance cost usually exceeds the tax savings.

Multi-entity structures: when one entity isn't enough

Once a business grows past a certain complexity, single-entity structures stop serving the owner. Common patterns:

Holding company + operating subsidiary. The operating business (with all its liability risk) runs at the sub level. Valuable assets (real estate, IP, valuable equipment) sit protected at the holding level. If the operating business gets sued, the assets in the holding company are structurally separated. Common for owner-operators with $500K+ in valuable business assets.

Real estate separated from operating. The business rents its space from a related LLC the owner controls. Separates real estate risk from operational risk and creates a rent-based cash flow the owner controls (with related tax planning implications).

IP holding entity. Trademarks, patents, and licensable IP owned by a separate entity that licenses to the operator. Preserves IP value if the operating business is later sold (buyer buys the operator, licenses IP from the holding entity you retain).

Multiple operating entities under a shared holding company. For owners running several related businesses that would benefit from shared services, consolidated banking, and tax coordination.

These structures add ongoing complexity (multiple tax returns, more careful bookkeeping, entity governance discipline) but the protection and tax benefits often justify the overhead at scale.

State of formation: Delaware, Wyoming, or your home state?

The default advice you'll hear online: "Form in Delaware." This is often wrong.

Delaware makes sense when: - You will raise venture capital (VCs prefer Delaware C-Corps) - The business will operate in multiple states, and Delaware's business court system (Court of Chancery) provides real value in dispute resolution - Your capitalization structure is complex enough to benefit from Delaware's well-developed corporate case law

Delaware doesn't make sense when: - The business will only operate in one other state (usually costs more in registered agent fees and duplicative filings than it saves) - You're a single-member LLC with no plans to raise capital - The business is a personal services firm operating locally

Wyoming is popular for owner privacy (Wyoming doesn't publish LLC member names), low fees, and business-friendly law. Good for holding entities and asset-protection structures. Not usually the right choice for operating businesses that need bank accounts and vendor relationships in another state.

Home state (whichever state you actually operate in) is the default when in doubt. Simpler, cheaper, and you'll need to register as a foreign entity anyway if you form elsewhere and operate in your home state.

Common formation mistakes

Choosing entity type before consulting anyone. The LegalZoom flow makes it easy to spin up an LLC without thinking through whether it's actually the right entity. Fixing entity choice after formation is possible but adds friction and cost (conversion filings, potential tax implications).

Skipping the operating agreement. Every multi-member LLC needs a properly drafted operating agreement — not the generic template. Every corporation needs bylaws and shareholder agreements. The generic templates leave critical decisions unresolved that come back to bite you when the situation actually arises. See Operating Agreements & LLC Governance.

Making S-Corp election without modeling the math. Some accountants push S-Corp election automatically regardless of income level. Verify the actual breakeven for your specific situation before adding the compliance overhead.

Ignoring state of formation for multi-state businesses. If you'll operate in California, forming in Delaware doesn't save you California's minimum franchise tax ($800/year) or filing obligations. You'll pay both. Understand the full compliance picture, not just the formation state.

Naming the entity in a way that limits future flexibility. "Angelo Mitlo Consulting LLC" limits you to consulting. "Mitlo Holdings LLC" is broader. Choose a name that supports future scope expansion.

Not opening a separate business bank account immediately. Commingling personal and business funds is the fastest way to lose limited liability protection in a court challenge (the "corporate veil" gets pierced). Get the EIN, open the business bank account, and route all business transactions through it from day one.

Forgetting about ongoing compliance. LLCs and corporations require annual filings in most states. Miss enough of them and the state administratively dissolves the entity, exposing you to personal liability retroactively.

How Northbridge approaches business formation

Business formation engagements typically cover: strategic entity selection (which of the four to form, and why), state of formation strategy, EIN and state registration filings, initial operating agreement or bylaws drafting, S-Corp election filing (when applicable), and compliance calendar setup.

Standard engagement: 5-10 hours at $150/hour for a single-entity formation. Multi-entity structures (holding + operating, IP separation, etc.) take 15-30 hours depending on complexity.

We don't compete with LegalZoom on price for pure paperwork filing. What we provide is the strategic thinking about which entity, which state, which structure, and which tax election — decisions that compound in value over the life of the business.

If you're forming a new business, restructuring an existing one, or trying to understand whether your current structure is still the right one — that scoping call is worth having early.

Frequently Asked Questions

Should I form an LLC or a corporation?

For most small businesses, an LLC is the right starting point — limited liability protection, pass-through taxation, minimal compliance overhead. A corporation (C-Corp) makes sense specifically when you'll raise venture capital, issue formal stock options through an employee stock option plan, or want to retain earnings for reinvestment at the 21% corporate tax rate. If none of those apply to you, start with an LLC.

What's the difference between an S-Corp and an LLC?

An LLC is an entity type (limited liability company). An S-Corp is a tax election you can make on either an LLC or a Corporation. When people say "should I form an S-Corp?" they usually mean "should I form an LLC and elect S-Corp taxation?" The election reduces self-employment tax on business profits above roughly $60K-$80K in annual net income.

Do I need a lawyer to form an LLC?

Legally no — you can file LLC formation paperwork yourself with your state, or through services like LegalZoom for $99-$300. What you don't get from those services is strategic thinking about entity choice, state of formation, S-Corp election analysis, or a properly drafted operating agreement. For simple single-member LLCs with no complexity, DIY filing is fine. For anything with multiple owners, tax complexity, or expected growth, professional guidance pays for itself.

Should I form my business in Delaware?

Only if you'll raise venture capital or operate meaningfully across multiple states. For most small businesses that will operate in one primary state, forming in your home state is simpler and cheaper. Delaware formation for a single-state operating business usually costs more in registered agent fees and duplicative filings than it saves.

What is a "multi-entity structure" and when do I need one?

A structure where a business uses two or more related entities to separate different functions (e.g., a holding company owns valuable assets while an operating company runs the business with all its liability risk). Common at $500K+ in valuable assets, businesses with real estate the owner also controls, or businesses with significant IP value. Adds compliance overhead but provides meaningful asset protection and tax planning benefits.

Can I change my entity type later?

Yes, but it adds friction. Converting an LLC to a corporation, or vice versa, requires state filings, potential tax consequences (especially with C-Corp elections), and updating all business relationships (bank accounts, contracts, licenses). Better to make the right choice initially than to convert later. If you're uncertain, single-member LLC is the easiest starting point because it converts to most other structures cleanly.

When should I get an EIN?

Immediately after forming the entity — usually within the first week. You need the EIN to open a business bank account, hire employees, and register for state tax accounts. EIN application is free through the IRS website and takes about 15 minutes.

For related reading, see Operating Agreements & LLC Governance (the document set that goes with entity formation) and the Business Formation & Entity Structuring service page.