Types of corporations guide: C corp, S corp, LLC, and more

What is a corporation

A corporation is its own legal entity, separate from whoever started it. Shareholders generally aren't personally liable for corporate debts and obligations solely because they own the corporation, although guarantees, misconduct, and failure to respect applicable corporate rules can create exceptions. The corporation can sign contracts, own property, sue someone, or get sued, all under its own name, independent of you.

The categories founders encounter are not all equivalent. Some are legal forms under state law, while others describe federal tax treatment.

• C corporation: a corporation subject to the normal federal corporate tax regime.
• S corporation: an eligible corporation or other qualifying entity that elects S tax treatment.
• Benefit corporation: a state-law for-profit corporate form that incorporates public-benefit/stakeholder objectives.
• Close corporation: a state-law form/status for closely held companies, with rules varying by state.
• Nonprofit corporation: an entity formed under state nonprofit law; federal tax exemption requires separate qualification.

Sole proprietorships, partnerships, and LLCs work under a different set of rules altogether. They aren't corporations, even though founders weigh them against corporations constantly when picking a structure.

Common corporation types and tax designations founders should know

Each type of corporation comes with its own tradeoffs around taxes, ownership limits, and how much paperwork you're signing up for.

C corporation (C Corp)

A C Corp is the version most people picture when they hear "corporation." It's a separate legal entity that pays its own taxes. A C corporation generally pays corporate income tax on taxable income, and shareholders may also owe tax when corporate earnings are distributed to them as dividends. That double layer is the tradeoff for what you get in return: the ability to issue multiple classes of stock, bring on unlimited shareholders including foreign investors, and build the kind of ownership structure institutional investors expect to see.

Why founders pick it:

• Personal assets stay protected from business debts and lawsuits
• No cap on shareholder count, so fundraising rounds don't force a restructure
• Multiple stock classes let you split voting rights and equity separately
• VCs and institutional investors generally prefer this structure by default

Corporations generally face more governance and recordkeeping requirements than LLCs, such as directors, corporate records, and state filings. Specific meeting, filing, and governance requirements depend on the state and governing documents. Skip the formalities, and you risk the liability protection that's the whole point of incorporating.

S corporation (S Corp)

An S corporation is a federal tax election, not a separate state-law entity type. An eligible domestic corporation, or another eligible entity such as an LLC, can file Form 2553 to elect S corporation treatment. What that buys you is pass-through taxation: profits and losses land on your personal return instead of getting taxed twice, which is what happens by default under a standard C Corp. LLCs that qualify can also elect S corporation taxation for an LLC without changing their underlying legal form.

Qualifying for it comes with real restrictions. You're capped at 100 shareholders, and every one of them has to be an individual, a certain kind of trust, or an estate. Partnerships, other corporations, and non-resident aliens can't hold shares. You're also limited to a single class of stock, full stop.

S corporations generally may have only one economic class of stock. Differences in voting rights alone do not necessarily create a second class, but preferred economic rights or different distribution/liquidation rights can violate the requirement. S corporation taxation can change employment-tax treatment because shareholder distributions generally aren't self-employment income, but shareholder-employees who perform services must be paid reasonable compensation as wages before non-wage distributions.

B corporation (Benefit Corporation)

A benefit corporation is a for-profit legal structure available under the laws of many states that requires the business to consider specified public or stakeholder benefits alongside shareholder interests. It is different from B Corp Certification, which is administered by B Lab. Most US states recognize the structure now, and shareholders can hold the business accountable for that mission the same way they'd hold it accountable for profit.

Benefit-corporation status does not by itself create a special federal tax exemption; federal tax treatment depends on the entity's applicable tax classification and elections.

Some states go further and require an annual benefit report showing what the company actually did toward that public benefit. Third-party certification exists too, but nothing about it is legally required to hold benefit-corporation status in a state where the structure is available.

Founders leaning toward this usually have a mission that's core to the business, not a side initiative, and they want legal cover for prioritizing that mission even when it costs short-term profit. Where it gets tricky is balancing shareholder expectations against the stated public benefit; you're still accountable to both.

Nonprofit corporation

Nonprofit corporations exist to do charitable, religious, educational, scientific, or literary work, and making a profit for owners isn't part of the deal. The internal structure looks a lot like a C Corp: you've still got a board of directors and formal governance sitting behind it. Where it splits off is what happens to any money the organization brings in.

You don't get federal tax exemption automatically. The IRS generally requires an application, Form 1023 for most nonprofits, though smaller organizations often qualify for the shorter Form 1023-EZ instead. There's generally a 27-month window from formation to get that filed. Stay inside it, and your tax exemption can generally reach back to the day the business was formed. File later than that, and the exemption only starts from your filing date forward.

There are limits that come with the status. For section 501(c)(3) organizations, participating or intervening in political campaigns for or against candidates is prohibited, and profits can't go to members. Whatever surplus the organization generates has to go back into the mission itself. Contributions to qualifying charitable organizations, including eligible 501(c)(3) organizations, may be tax-deductible for donors subject to applicable rules. Nonprofit incorporation alone does not make contributions deductible.

Founders building something mission-first tend to land here, where public benefit matters more than shareholder returns, and grant or donor funding carries more weight than equity investment would.

Close corporation

A statutory close corporation is designed for a small, closely held shareholder group and may allow streamlined governance under applicable state law. In some states, qualifying close corporations can modify or dispense with normal board formalities, but requirements vary significantly. Shares typically can't trade publicly, and a small group of shareholders can run the whole thing directly. It's built for smaller companies that want liability protection without the meeting-and-bylaws overhead that comes with a standard corporation.

State rules vary a fair amount here, so what counts as a close corporation, and what's required to maintain that status, depends on where you incorporate. This structure fits founders running a tightly held business with a handful of trusted co-owners, where going public or bringing in outside investors isn't part of the plan anytime soon.

Professional corporation (PC)

Some states allow or require licensed professionals such as doctors, lawyers, or accountants to organize through a professional corporation. Ownership and liability rules vary by profession and state, so this is mainly relevant to regulated professional practices.

Other business structures compared to corporations

As a founder, the structure you choose directly affects your taxes, liability, ownership flexibility, and how easily you can raise capital. Let's review other business structures to help you choose an option that fits your tax needs, ownership goals, and growth plans.

Sole proprietorship

A sole proprietorship is about as simple as starting a business in the US. There's no separate entity to form, no board, nobody to run approvals past. A sole proprietorship usually involves fewer formation steps than an LLC or corporation, although licenses, permits, DBA filings, and local requirements may still apply.

Everything flows straight to your personal tax return. Income and expenses go on Schedule C, and your accounting stays simple enough to manage yourself while you're still figuring out whether the idea works.

What you get:

• Every decision is yours, made instantly, no partners or investors to check with
• The owner is entitled to the business's profits after expenses and taxes
• Taxes stay simple through Schedule C and self-employment tax on your personal return
• Nothing gets split with shareholders
• Pivoting your offering doesn't require any legal paperwork

What you're exposed to: your home, savings, and other personal assets are on the line if the business owes money or gets sued. Sole proprietorships cannot issue equity, which limits traditional equity fundraising, and financing options may differ from those available to separate business entities. Bringing in a partner or investor down the line usually means restructuring into an LLC or corporation anyway. And if you retire, sell, or pass away, the business legally ends with you unless you've set up a transfer.

This fits freelancers and solo founders testing something in the US market, low-risk businesses that need to validate fast, and anyone prioritizing speed over outside funding for now.

Partnership (incl. GP/LP/LLP)

You've got two or more people owning and running the business together in a partnership, with profits, losses, and management responsibility split between them. A partnership files Form 1065 and provides each partner a Schedule K-1 reporting that partner's share of income, deductions, and other tax items; partners then report those items on their own returns. You can technically run a partnership without anything in writing, but that's usually a bad idea. A real partnership agreement is what settles who's responsible for what and how a disagreement actually gets resolved when one comes up.

Most partnerships fall into one of three types.

• A general partnership puts everyone on equal footing. General partners generally participate in management and can carry personal liability for partnership obligations; rights and profit sharing may be modified by agreement and state law. It only really works when you trust the people you're partnering with and everything important is written down.
• A limited partnership works differently. General partners actually run the business and carry unlimited liability for it. Limited partners put in money and stay out of daily operations, so their risk caps at whatever they invested. This structure is common when a business needs capital but doesn't want to hand over control to whoever's providing it.
• An LLP can limit partners' personal liability for certain partnership obligations, although the scope of protection varies by state and does not generally eliminate liability for a partner's own misconduct. Law firms, accounting practices, and consulting firms lean on this structure often.

Teaming up brings real advantages. You combine capital, skills, and networks with someone else, which tends to move things faster than going solo. Setup stays light, usually just a partnership agreement plus whatever local licenses apply. Profits pass straight through to personal returns, so you skip double taxation. Partners run the business how they want, without a board or formal corporate structure getting in the way, and two (or more) people can simply handle more than one person could alone.

The tradeoffs sit mostly in shared risk. General partners carry unlimited personal liability for whatever the business owes or gets sued over. Disagreements happen, especially around effort, vision, or who's putting in what money, and without a solid agreement those disputes get ugly fast. Corporations tend to win out over partnerships when investors are choosing where to put money, mainly because the liability and equity structure is easier to work with. Continuity isn't guaranteed either. A partner leaving can end the business unless there's a plan in place for that.

Founders entering a market together with complementary skills or capital find this fits well. So do small teams comfortable sharing moderate risk, or anyone testing an idea who wants something fast and straightforward before committing to a more formal structure.

Limited liability company (LLC)

An LLC is a state-law entity with flexible federal tax treatment. A single-member LLC is generally disregarded for federal income-tax purposes by default, while a multi-member domestic LLC is generally taxed as a partnership unless it elects corporate treatment. Eligible LLCs can also elect S corporation taxation. If you're weighing an LLC against a C Corp vs LLC (https://aspireapp.com/us/blog/c-corp-vs-llc) decision directly, the tradeoffs mostly come down to fundraising plans and how you want profits taxed. Your personal assets stay out of the business's debts and lawsuits under this structure.

What it gets you:

• Your home, savings, and personal accounts stay shielded if the business runs into trouble.
• Profits and losses can flow through to your personal return, depending on your tax classification, so you may avoid the double taxation a C Corp deals with.
• You choose how it's run, manage it yourself or bring in managers to handle operations. Membership has no cap, subject to state law and the operating agreement; one founder or a hundred can join, and other corporations or LLCs can be members too.
• There's no board of directors or annual shareholder meeting requirement weighing things down.

Where it gets complicated: state rules aren't consistent, and some states force an LLC to dissolve or re-register when a member leaves. Members may owe self-employment tax depending on their tax classification and role in the business. Investors often lean toward corporations instead, since the equity structure fits their expectations better, which can slow down fundraising. And you still need to keep personal and business finances separate, with real records to back that up.

Founders who want personal asset protection without overcomplicating their taxes tend to land here. So do small to mid-sized startups that want flexibility without corporate formality, businesses with multiple owners who need clear rules around profit sharing, and anyone who might convert to a corporation later but wants to start lean for now.

Comparing corporations and business structures at a glance

Eight structures, one table, so you can compare different types of corporations against the other business structures side by side on the factors that actually change your decision: ownership, liability, taxes, setup complexity, and how the business continues over time.

Source: sba.gov, irs.gov

Choosing the right structure for your business

There's no single right answer here. It comes down to how much personal risk you're willing to carry, how you want profits taxed, and where you're trying to take the business. Working through the different types of corporations against the other business structures on these seven factors will get you to a decision faster than trying to pick a "best" option in the abstract.

Your liability risk

Corporations and LLCs generally provide owners with limited liability for business obligations, while general partners and sole proprietors can face broader personal exposure. The actual protection depends on entity law, guarantees, conduct, and maintaining the entity correctly.

How you want to be taxed

Separate legal structure from tax classification. A standard corporation is generally taxed under Subchapter C unless an eligible entity makes an S election. LLC tax treatment depends on membership and elections, while qualifying nonprofit organizations may receive federal tax-exempt status. Tax shouldn't be evaluated alone; changing classification can affect payroll, distributions, investor eligibility, and compliance.

Whether you plan to raise outside capital

Institutional venture investors commonly prefer Delaware C corporations because their stock, governance, and financing structure fits standard venture documents. But not every angel investment or outside-capital scenario requires a C Corp. If outside institutional equity isn't part of the plan, an LLC or S election may be worth evaluating for administrative or tax reasons, but the better choice depends on ownership, state law, and expected profits.

How simple or formal you want operations to be

Fewer meetings. Less paperwork sitting between you and actually running the business. In some states, close-corporation regimes may allow streamlined governance. A standard corporation trades that simplicity for structure, and once you're scaling or answering to outside oversight, that structure starts paying for itself.

How many owners are involved, and what roles they play

A sole proprietorship works fine when it's just you running things. Once co-founders, active partners, or passive investors get involved, that simplicity runs out fast. You need a structure that actually spells out who owns what, who has control, how profit gets split, and what the exit looks like if someone decides to leave. S election eligibility depends not just on owner count but on who the owners are.

What your growth path looks like

Businesses testing an idea may prioritize simpler structures, while companies planning equity compensation, multiple investment rounds, or an acquisition path may benefit from selecting a structure that supports those needs earlier.

If your business is mission-driven

A benefit corporation is a for-profit legal form designed to embed public-benefit objectives into governance. Separately, B Corp Certification is a voluntary certification administered by B Lab. A nonprofit corporation serves a fundamentally different ownership and mission model and may seek tax-exempt status if eligible.

How much flexibility you want if things change

Pick the structure that fits where your business actually is right now, not some future version of it you're guessing at. You can often change structure or tax classification later, but conversions can trigger tax, filing, and legal consequences, so don't assume switching is frictionless.

Conclusion

Picking a structure isn't really about finding the "best" one. It's about matching what you choose to where the business actually stands right now, how much risk you're carrying, how you want to handle taxes, and what the next couple of years look like for growth.

Once you've chosen a structure, formation is only the first step. The entity still needs appropriate filings, tax registrations, records, governance, and financial separation based on its structure and state. What actually determines whether the early months run smoothly is the operational side: opening the right accounts, keeping expenses organized, and having a clear read on cash from day one. That's where Aspire fits in, with business banking¹, corporate cards², and expense tracking built to work together instead of as separate tools you're stitching together yourself.