Articles of incorporation are the public document you file with a state to legally create a corporation, and the moment they are accepted is the moment the company exists as a separate legal entity. In Delaware and some other states the same document is called a certificate of incorporation. It is short, usually a page or two, and that brevity is the trap: because it feels like a formality, founders accept whatever a filing service defaults to and inherit a share count, a par value, or a registered-agent arrangement that they later spend real money to amend.
The document does one job well. It tells the state, and the public, that a corporation now exists, what it is called, who can receive legal notice for it, and how many shares it may issue. It deliberately does not contain the company's internal rules. Those live in the bylaws and, once there are multiple owners, a stockholders' agreement. Keeping that division straight is the first thing to understand, because a founder who thinks the articles govern how the company runs will be surprised when they do not.
What articles of incorporation must include
A workable filing sets four things. The corporate name, which must be available in the state and satisfy naming rules, usually including a corporate identifier. The registered agent and registered office, a person or company in the state of incorporation authorized to receive legal and tax notices, which is why out-of-state startups incorporating in Delaware use a commercial agent. The authorized shares, meaning the maximum number of shares the corporation can ever issue, along with their classes and, where required, par value. And often the incorporator, and sometimes the initial directors. Everything else that founders care about, vesting, transfer restrictions, board mechanics, comes afterward in other documents.
Authorized shares and par value: the two numbers that bite
The share count is the detail most worth getting right on the first pass. Authorize too few shares and you cannot cleanly split founder equity, seed an option pool, and leave room for investors without amending the certificate, which costs time and a filing fee at the worst moment. Many venture-track startups authorize a large round number, commonly 10 million shares of common stock, precisely so the cap table has room to breathe. Par value, the nominal floor price of a share, sounds trivial and mostly is, except that in states like Delaware it interacts with the franchise-tax calculation, so a careless choice can produce a surprising bill. Neither number is hard to set correctly; both are annoying to fix later.
Incorporation creates the shell. A perfect certificate with no founder stock issued, no bylaws, and no board is an empty company that only looks formed.
The steps that have to follow immediately
Filing the articles is the start of formation, not the end. Right behind it come the steps that actually make the corporation real and fundable: adopt bylaws, appoint the initial board and officers, and issue founder stock, which means the founders subscribe for and pay for their shares rather than assuming they own them by default. If founder stock is subject to vesting, an 83(b) election filed within the strict thirty-day window is often the difference between a small tax now and a large one later. Skipping these is how a company ends up perfectly incorporated on paper and unable to answer basic diligence questions about who owns what.
The context that changes the answer
Where and how you incorporate is a larger decision the articles sit inside. The entity choice itself, corporation versus LLC, is covered in LLC vs C-corp, and the state question, whether Delaware still makes sense, in should startups incorporate in Delaware. If you already run an LLC and are converting to a corporation to raise money, the certificate is one step of the sequence in converting an LLC to a C-corp. And the corporation's internal rulebook, the counterpart to an LLC's operating agreement, is the bylaws and stockholders' agreement you adopt right after filing.
- Articles (or a certificate) of incorporation are the public filing that legally creates a corporation; internal rules live in the bylaws and stockholders' agreement.
- They must set the corporate name, registered agent and office, and authorized shares (with class and par value where required).
- Authorize enough shares up front (often a large round number) so founder splits and an option pool do not force an amendment.
- Choose par value with the franchise-tax math in mind, especially in Delaware.
- Filing is step one: issue and pay for founder stock, adopt bylaws, seat the board, and consider a timely 83(b) election for restricted stock.
The articles of incorporation are short by design, and short documents invite autopilot. Set the name, the agent, and above all the authorized shares deliberately, then treat the filing as the trigger for the founder-stock and governance steps that turn a legal shell into a real, fundable company.
Related reading: LLC vs C-corp, the LLC operating agreement, and the startup legal documents checklist. Or start a conversation about incorporating cleanly.