How to Form an S Corporation: Step-by-Step Guide

Forming an S Corporation takes two main steps: first, you file Articles of Incorporation with your state to create the corporation, then you file IRS Form 2553 to elect S Corporation tax status. The process involves a few moving parts, but each step is straightforward when you know what to expect.

An S Corporation is a standard corporation that has elected a special federal tax status with the IRS. The business itself does not pay federal income tax at the entity level. Instead, income and losses pass through to shareholders, who report them on their personal tax returns.

The main reason business owners choose S Corp status is to reduce self-employment taxes. As an S Corp shareholder-employee, you pay yourself a reasonable salary — subject to payroll taxes — and take additional profits as distributions, which are not subject to self-employment tax. That split can add up to real savings as the business grows.

One thing worth knowing: S Corp status is a tax election, not a separate legal entity type. You still form a standard corporation at the state level first, then elect S Corp treatment with the IRS.

Not every corporation qualifies for S Corp status. The IRS sets specific eligibility rules, and your corporation needs to meet all of them before you file Form 2553. Most small businesses qualify without issue, but it's worth checking before you start.

• The corporation must be a domestic corporation — formed in the United States
• No more than 100 shareholders are allowed
• Shareholders must be individuals, certain trusts, or estates — not other corporations or partnerships
• Nonresident aliens cannot be shareholders
• The corporation can have only 1 class of stock

If your business has foreign investors or a complex ownership structure, talk to a tax professional before electing S Corp status — those situations can disqualify the election.

Forming an S Corporation involves 6 steps across 2 phases: forming the corporation at the state level, then electing S Corp status with the IRS. The state steps happen first. The IRS election follows. Getting the sequence right — and hitting the Form 2553 deadline — is where most people run into trouble.

Step 1: choose your state of incorporation

You can form your corporation in any state — you don't have to incorporate where you live or where the business operates. Most small business owners incorporate in their home state to keep things simple and avoid registering as a foreign corporation in a second state. File your Articles of Incorporation with the Secretary of State or equivalent state agency in the state you choose.

Step 2: file Articles of Incorporation

Articles of Incorporation is the document that legally creates your corporation. Most states let you file online, by mail, or in person through the state's business filing portal. The document typically needs to include your corporation's name (ending in "Corporation," "Incorporated," "Corp.," or "Inc."), your registered agent's name and address, the number of authorized shares, and your incorporator's information.

State filing fees vary. Once the state approves your Articles, your corporation legally exists — but you don't have S Corp tax status yet. That comes from the IRS, not the state.

Step 3: appoint a registered agent

Every corporation needs a registered agent — a person or business with a physical address in your state of incorporation who can receive legal documents and official notices on your behalf. You can serve as your own registered agent, appoint an officer of the corporation, or use a registered agent service. The registered agent's name and address go into your Articles of Incorporation.

Step 4: apply for an Employer Identification Number (EIN)

An Employer Identification Number (EIN) is required for every S Corporation — even if you have no employees. The IRS uses it to identify your business for tax purposes. Apply using Form SS-4 at irs.gov/ein. The online application is free and issues your EIN immediately. The IRS online application is available Monday through Friday, 7 AM – 10 PM ET.

Step 5: adopt bylaws and issue stock

After incorporation, the board of directors needs to adopt corporate bylaws — the internal rules that govern how your corporation operates, including how meetings are run, how officers are appointed, and how decisions get made. You'll also need to issue stock certificates to shareholders to document their ownership. S Corporations can only have 1 class of stock, so keep the share structure simple.

Step 6: file IRS Form 2553 to elect S Corp status

This is the step that actually makes your corporation an S Corporation for tax purposes. File Form 2553, Election by a Small Business Corporation, with the IRS. All shareholders who own stock on the day of the election must sign the form.

The deadline matters. For a new corporation, Form 2553 must be filed no later than 2 months and 15 days after the beginning of the tax year the election is to take effect. For a calendar year corporation, that means the election for the current tax year is due by March 15. Miss that window and the election takes effect the following year.

Once your S Corp election is approved, your ongoing compliance obligations start. The most important one is the annual tax return. S Corporations file Form 1120-S — the U.S. Income Tax Return for an S Corporation — by the 15th day of the 3rd month after the end of their tax year. For a calendar year corporation, that's March 15.

Form 1120-S reports the corporation's income, deductions, and credits. Each shareholder receives a Schedule K-1 showing their share of the corporation's income and losses, which they report on their personal return. The corporation itself does not pay federal income tax — that's the core benefit of S Corp status.

Beyond the federal return, you'll need to stay current with your state's annual report requirements, maintain your registered agent, and hold annual shareholder meetings as required by your bylaws. A tax professional can help you figure out the right salary-to-distribution split for your situation — that's where the real tax planning happens.