How to Start a C-Corp: A Step-by-Step Guide (2026)

How to Start a C-Corp (Quick Answer)

To start a C-corp, file Articles of Incorporation (called a Certificate of Incorporation in some states) with the Secretary of State, appoint a registered agent, and pay the state filing fee. Once the state approves the filing, your corporation legally exists.

Formation is only the first step. You then adopt bylaws, appoint directors and officers, issue stock, and get an EIN from the IRS. A C-corp is taxed as its own entity: it pays 21% federal corporate income tax on profits, plus any state corporate tax, and shareholders are taxed again on the dividends they receive.

First-year cost: the state filing fee (commonly around $50 to $500, confirm your state) is the smallest number. Add a registered-agent service if you are not based in the state, commonly $35 to $300 a year.

If you form in Delaware, budget for the annual franchise tax and a $50 annual report, both due March 1. The one-time filing is minor next to the recurring corporate tax and compliance calendar.

Forming the corporation is a short filing. The harder part is everything that makes the corporation real and compliant: adopting bylaws, issuing stock and keeping a stock ledger, the founder's 30-day 83(b) window, and the annual double layer of tax. That post-formation work is where founders actually get tripped up.

TL;DR

• Decide if a C-corp fits first: it is taxed twice, once at 21% on corporate profit and again on dividends, so it suits companies raising money or keeping earnings in the business more than small firms that pay profits out.
• Step 1, choose your state: Delaware if you will raise venture capital, your home state if you will not.
• Step 2, name: pick a unique name with a corporate designator (Inc., Corporation, or Corp.) and check the state's business database.
• Step 3, registered agent: appoint one with a physical address in your state of incorporation.
• Step 4, Articles of Incorporation: file them with the Secretary of State to create the corporation.
• Step 5, bylaws: adopt internal bylaws and keep them with your records.
• Step 6, directors and officers: appoint the board and officers and hold an organizational meeting.
• Step 7, issue stock: authorize and issue shares, keep a stock ledger, and file the 83(b) election within 30 days if your shares vest.
• Step 8, EIN: get a free EIN from the IRS, by Form SS-4 if you have no SSN or ITIN.
• After formation: a C-corp is the default, so file Form 2553 within 2 months and 15 days to elect S-corp taxation; file Form 1120 and your state taxes every year; a 25%-or-more foreign-owned C-corp also files Form 5472.

Is a C-Corp the Right Choice?

A C-corp is not automatically the best structure. For many small, profitable businesses that distribute most of their earnings, an LLC or an S-corp is simpler and taxed only once. The honest test is what you plan to do with profits and whether you will raise money.

A C-corp usually wins when you plan to raise venture capital, when you want to keep earnings in the business to grow it, or when your stock could later qualify for the Qualified Small Business Stock exclusion under Section 1202. Investors expect a C-corp because it can issue preferred stock and multiple share classes, which an S-corp cannot.

A C-corp usually loses when you are a small, profitable company that pays most earnings out to the owners. There, the second layer of dividend tax is a real cost that a pass-through entity avoids.

• Raising venture capital: C-corp (investors require it).
• Keeping profits in the business to grow: C-corp (retained earnings taxed at 21%).
• Small and distributing most profit: LLC or S-corp (taxed once).
• Want multiple classes of stock, or many or foreign shareholders: C-corp (S-corps are capped at 100 shareholders and one class of stock).

Step 1: Choose Your State of Incorporation

Where you incorporate is a real decision that most guides treat as a formality.

• Raising venture capital? Incorporate in Delaware. Investors, their lawyers, and standard financing documents assume a Delaware C-corp, and the Court of Chancery gives corporate disputes a specialized, predictable forum.
• Not raising venture money? Your home state is often cheaper and simpler. Forming in Delaware but operating elsewhere means you must also register as a foreign corporation in your home state, paying two sets of fees and filing two annual reports.
• Foreign qualification is the hidden cost. A Delaware corporation doing business in, say, California still registers and pays in California on top of Delaware. Factor both states in before you choose.

Step 2: Choose and Reserve Your Corporate Name

• Include a corporate designator such as "Inc.", "Incorporated", "Corporation", or "Corp."
• Search the Secretary of State's business database first to confirm the name is available and distinguishable from existing entities.
• Reserve it if you are not ready to file. Most states hold a name for a set period for a small fee.
• Check trademark availability separately. A state name clearance is not a trademark, and the two are easy to confuse.

Step 3: Appoint a Registered Agent

Every corporation must name a registered agent in its state of incorporation: a person or company with a physical street address there, available during business hours to receive legal and state documents.

• The agent's address is public record, so many founders use a commercial registered-agent service rather than a home address.
• Incorporating outside your home state means you need an agent in each state where you register.
• A PO box does not qualify; the address must be a physical location in the state.

Step 4: File Your Articles of Incorporation

The Articles of Incorporation (a Certificate of Incorporation in states like Delaware and New York) is the document that legally creates your corporation. You file it with the Secretary of State.

• It typically lists the corporate name, registered agent, business purpose, and the number of shares the corporation is authorized to issue.
• Authorized shares matter later. In some states the filing fee, and in Delaware the annual franchise tax, scale with how many shares you authorize.
• Filing fees vary by state, commonly around $50 to $500. Confirm the current fee on your state's site before filing.
• Once the state accepts the filing, your corporation exists and the compliance clock starts.

Step 5: Adopt Corporate Bylaws

Bylaws are the internal rulebook for how the corporation is run. They are not filed with the state, but a corporation is expected to have them, and banks and investors often ask to see them.

• They set out how directors and officers are elected, how meetings and votes work, and how shares are handled.
• They are adopted internally and kept with your corporate records, not sent to the Secretary of State.
• Skipping them weakens the separation between you and the corporation that liability protection depends on.

Step 6: Appoint Directors and Hold the Organizational Meeting

A corporation is governed by a board of directors, who appoint the officers that run day-to-day operations. Right after formation, the incorporator or initial directors hold an organizational meeting, or sign a written consent in place of one.

• Appoint the initial board of directors and elect officers (typically at least a president, secretary, and treasurer; one person can hold several roles).
• Formally adopt the bylaws.
• Authorize the issuance of stock and approve opening a bank account.
• Keep signed minutes or the written consent with your corporate records. This paperwork is part of what keeps the liability shield intact.

Step 7: Authorize and Issue Stock

Issuing stock is what actually gives founders their ownership, and it is a step that is easy to rush. The board authorizes shares, then the corporation issues them to the founders and any early shareholders.

• Issue shares to each founder and record what they paid for them (cash, property, or services).
• Maintain a stock ledger, a running record of who owns how many shares. This is your source of truth for ownership and is not optional.
• Deliver stock certificates or record the issuance electronically, per your bylaws.

The 83(b) election, and its 30-day trap: if your founder shares vest over time (common when there are co-founders), you generally have a hard 30-day deadline from the grant date to file an 83(b) election with the IRS. Filing it lets you be taxed on the small value at grant instead of the higher value as the stock vests. The 30-day window cannot be extended and the election cannot be undone, which makes it one of the easiest and most expensive things a founder can miss.

Step 8: Get an EIN, Even Without an SSN

An EIN is your corporation's federal tax ID, required to file taxes, run payroll, and open a bank account. It is free from the IRS.

• Founders with an SSN or ITIN can apply online and receive the EIN in minutes.
• Founders without an SSN or ITIN apply on Form SS-4 by phone, fax, or mail instead of the online tool.
• The EIN is always free; you never have to pay the IRS for one.

Open a US Business Bank Account

Once you have the EIN, open a dedicated business bank account before money moves through the corporation.

• Keeping corporate and personal funds separate protects the liability shield; commingling is a common reason courts pierce it.
• Banks typically ask for the filed Articles of Incorporation, the EIN confirmation letter, and often the bylaws or a board resolution.
• A separate account also makes bookkeeping and the corporate tax return far simpler.

C-Corp by Default, S-Corp by Election

A newly formed corporation is a C-corp for tax purposes by default. If you want it taxed as an S-corp instead (pass-through, a single layer of tax), you have to elect that, and the deadline is tight.

• File Form 2553 within 2 months and 15 days of the beginning of the tax year the election should take effect. For a brand-new corporation, that window runs from the date it starts its first tax year.
• Miss the window and you are a C-corp for that year. Late relief exists in some cases with reasonable cause, but it is not guaranteed.
• An S-corp caps you at 100 shareholders, one class of stock, and no nonresident-alien shareholders, so it does not fit companies planning to raise venture capital.

What Double Taxation Actually Costs

Every guide says a C-corp faces "double taxation." Few show the math, so here it is on $100,000 of corporate profit, at the federal level only.

That is a 32.85% combined federal rate on distributed profit, or about 33%, and it climbs to about 39.8% for high earners who pay the 20% dividend rate plus the 3.8% net investment income tax. A state corporate tax, where one applies, stacks on top.

The key nuance: the second layer only applies when profits are paid out as dividends. If the corporation keeps its earnings to reinvest and grow, those earnings are taxed only at the 21% corporate rate until they are distributed. That retained-earnings advantage, along with the possible Section 1202 exclusion on a future sale of qualified stock, is why growth companies still choose the C-corp despite the double layer.

Section 1202's requirements and dollar caps were expanded by 2025 legislation, so confirm the current holding period and thresholds with a tax advisor before relying on it.

If Your C-Corp Has a Foreign Owner

A C-corp that is 25% or more owned by a non-US person carries an extra federal filing that trips up many international founders.

• The corporation files Form 5472 alongside its annual Form 1120 to report transactions with the foreign owner, such as capital contributions or payments for services.
• It is required every year there are reportable transactions, even if the corporation had little or no profit.
• The penalty is steep: a missed or late Form 5472 starts at $25,000 per form, per year, so this is not a filing to overlook.

Ongoing C-Corp Compliance Calendar

Formation is the start of the calendar, not the end of it. A C-corp has recurring obligations that run on separate schedules.

• Federal income tax: file Form 1120 each year, due the 15th day of the 4th month after your tax year ends (April 15 for a calendar-year corporation).
• Estimated taxes: a profitable C-corp generally pays federal estimated tax in quarterly installments.
• State corporate tax and reports: most states levy a corporate income or franchise tax and require an annual or biennial report, each with its own fee and deadline.
• Registered agent: renew the service each year in every state where you are registered.
• Payroll and 1099s: if the corporation has employees or contractors, add payroll tax filings and year-end forms.

How Much Does It Cost to Start a C-Corp?

The one-time filing is the small part. Here is where the money actually goes.

Confirm the filing fee and any state taxes on your state's official site before you budget, since these figures move.

How Long Does It Take to Start a C-Corp?

Timing depends mostly on the state and whether you pay to expedite.

• State approval of the Articles ranges from same-day or a few business days to several weeks, and many states sell expedited processing.
• The EIN comes next: minutes online with an SSN or ITIN, or from same day to several weeks by Form SS-4 without one.
• The bank account can only follow the EIN, while bylaws, the organizational meeting, and stock issuance can happen in parallel once the state approves the filing.

Common Mistakes to Avoid

• Treating formation as the finish line. Filing the Articles is step one; bylaws, the board meeting, and issuing stock are what make the corporation real.
• Missing the 30-day 83(b) deadline. Founders on vesting stock who miss it can owe tax as the stock appreciates, and it cannot be extended.
• Assuming the S-election happens automatically. It requires Form 2553 within a tight window; miss it and you are a C-corp for the year.
• Forming in Delaware by reflex. If you will not raise venture money, Delaware often just adds a second state's fees and filings through foreign qualification.
• Overlooking Form 5472. A 25%-or-more foreign-owned C-corp owes this filing every year, with a $25,000 minimum penalty for missing it.
• Commingling funds. Running personal and corporate money through one account undermines the liability protection the corporation is meant to provide.

How FinStackk Helps

FinStackk is an accounting and tax compliance platform for U.S. businesses, taking you from incorporation through ongoing accounting, tax, and compliance in one place.

We handle C-corp formation, from the filing through the EIN, through Fin-Start, including the Articles of Incorporation filing and the registered agent.

Once the corporation exists, Fin-Tax keeps the federal Form 1120 deadline, estimated taxes, and your state's corporate tax on a proactive calendar, and Complyy tracks the state compliance requirements that sit alongside them, such as annual reports and registered-agent renewals. Book a free demo to see them in action.

FAQ

Is it better to have an LLC or a C-corp?

It depends on your plans. An LLC is simpler and taxed once, which suits many small businesses that distribute their profits. A C-corp makes sense when you plan to raise venture capital, keep earnings in the business to grow, or want your stock to qualify for the Section 1202 exclusion. Investors generally require a C-corp because it can issue preferred and multiple classes of stock.

How much does it cost to start a C-corp?

The state filing fee is commonly around $50 to $500, one time. Add a registered-agent service (about $35 to $300 a year) if you use one, plus your state's annual report and corporate or franchise tax going forward. The one-time filing is minor next to the recurring corporate tax and compliance costs.

What are the disadvantages of a C-corp?

The main one is double taxation: the corporation pays 21% federal tax on profits, and shareholders are taxed again on dividends. C-corps also carry more formality (bylaws, a board, minutes, and a stock ledger) than an LLC. The double layer only applies to profits actually distributed; retained earnings are taxed only at 21% until paid out.

How do owners of a C-corp get paid?

Owners who work in the business are typically paid a reasonable salary as employees, which the corporation deducts and which is taxed once on the owner's return. Owners can also receive dividends on their shares, which come from after-tax profits and are taxed again at the shareholder level. Many owner-operators lean on salary to avoid the second layer.

What are the requirements for a C-corp?

At a minimum: a unique corporate name with a designator, a registered agent in the state, filed Articles of Incorporation, adopted bylaws, a board of directors and officers, issued stock recorded in a stock ledger, and an EIN. Ongoing, the corporation files Form 1120 and meets its state's tax and report requirements.

Can one person start a C-corp?

Yes. A single person can be the sole shareholder, the sole director, and hold all the officer roles. You still complete the same steps (bylaws, an organizational consent, issuing stock to yourself, and an EIN) and keep the same corporate records.

What is the 83(b) election, and why does it have a 30-day deadline?

If your founder shares vest over time, an 83(b) election tells the IRS to tax you on the shares' small value at grant rather than their higher value as they vest. You must file it within 30 days of the grant. The deadline is firm, cannot be extended, and the election cannot be reversed, which is why it is one of the most important early filings for founders.

Where should I incorporate my C-corp?

If you plan to raise venture capital, incorporate in Delaware, which investors and their standard documents expect. If you will not raise venture money, your home state is often cheaper and simpler, because forming in Delaware while operating elsewhere means registering as a foreign corporation in your home state and paying two sets of fees.

Can a non-US resident start a C-corp?

Yes. The US sets no citizenship or residency requirement to own a C-corp. You will need a registered agent in the state and an EIN, which you apply for on Form SS-4 by phone, fax, or mail without an SSN. If a non-US person owns 25% or more, the corporation also files Form 5472 with its Form 1120 every year, with a $25,000 minimum penalty for missing it.