Creating an S corporation in California is a two-step process: form a standard corporation with the California Secretary of State, then file IRS Form 2553 to elect S corporation tax treatment. California automatically recognizes the federal S election, so no separate state election is needed. What surprises many new owners is that California still charges every S corporation a 1.5% tax on net income plus an $800 annual minimum franchise tax, which makes ongoing costs higher here than in most other states.1Franchise Tax Board. S Corporations
Confirm You Qualify Before You File
The IRS restricts S corporation status to domestic corporations with no more than 100 shareholders and only one class of stock. Shareholders must be individuals, certain trusts, or estates. Partnerships, other corporations, and non-resident aliens cannot hold shares. Certain financial institutions, insurance companies, and domestic international sales corporations are ineligible entirely.2Internal Revenue Service. S Corporations
Check these against your ownership plans before spending money on formation. Discovering a disqualifying shareholder after incorporation is an expensive fix.
Pick a Name and an Agent for Service of Process
Your corporate name must be distinguishable from other corporations on file with the Secretary of State and must not be likely to mislead the public. Search the Secretary of State’s Business Search portal first, and reserve the name for a fee if you’re not ready to file.3California Secretary of State. Business Entity Name Reservations The name has to include a corporate designator such as “Inc.,” “Corp.,” or “Incorporated.”
Every California corporation also needs an agent for service of process to receive lawsuits and legal notices. An individual agent must be a California resident, and the filing has to list their physical California street address, no P.O. boxes.4California Legislative Information. California Corporations Code 1502 A corporate agent works too, but that company must have a current agent registration certificate on file with the Secretary of State.5California Legislative Information. California Corporations Code 1505
File the Articles of Incorporation
Form the corporation by filing Articles of Incorporation (Form ARTS-GS for a general stock corporation) with the California Secretary of State. The form asks for:
- The exact corporate name.
- An initial street address for the corporation, not a P.O. box.
- The name and California street address of your agent for service of process, or the name of your registered corporate agent.
- The number of authorized shares. You must authorize at least one. The standard ARTS-GS form covers a single class of shares, which is all an S corporation is allowed anyway.
- A purpose statement. The form provides standard language covering any lawful activity.
Each incorporator signs.6California Secretary of State. Instructions for Completing the Articles of Incorporation of a General Stock Corporation You can submit by mail or in person, and the filing fee is $100.7California Secretary of State. Forms, Samples and Fees
Get an EIN, Adopt Bylaws, and File the Statement of Information
Once the state approves your Articles, apply for an Employer Identification Number from the IRS. The IRS specifically advises forming your entity with the state before applying.8Internal Revenue Service. Employer Identification Number The online application is free and usually issues the number immediately. You need it to file taxes, open a business bank account, and run payroll.
Adopt bylaws next. Bylaws are your corporation’s internal rulebook covering how directors are elected, how meetings run, what officers you’ll have, and how decisions get made. California doesn’t require you to file bylaws with the state, but you need them in your corporate records and they govern everything downstream.
Within 90 days of incorporation, file a Statement of Information with the Secretary of State. It lists the principal office address, the names and addresses of directors and officers (president, secretary, treasurer), the agent for service of process, and a short business-activity description. The filing fee is $25.9California Department of Industrial Relations. Statement of Information Form SI-200 Miss the 90-day deadline and you can face Franchise Tax Board penalties and eventual suspension of the corporation, so put the date on your calendar the day you file the Articles.10California Secretary of State. Statements of Information Filing Tips
File Form 2553 to Elect S Corporation Status
With the corporation formed and an EIN in hand, file IRS Form 2553, “Election by a Small Business Corporation.” Every shareholder must consent to the election and sign the form.11Internal Revenue Service. About Form 2553, Election by a Small Business Corporation Once the IRS accepts the election, California treats the corporation as an S corporation for state purposes automatically. There is no separate California election.12California Franchise Tax Board. S Corporations
Deadline
To have the election take effect for a given tax year, file Form 2553 either during the preceding tax year or no later than two months and 15 days after the tax year begins. For a calendar-year corporation, that deadline is March 15.13Office of the Law Revision Counsel. 26 USC 1362 – Election; Revocation; Termination If you incorporate mid-year, count two months and 15 days from the incorporation date.
Miss the deadline and the election doesn’t kick in until the following tax year, meaning your corporation is taxed as a C corp for the gap. The IRS can grant relief for late elections when there was reasonable cause for the delay.13Office of the Law Revision Counsel. 26 USC 1362 – Election; Revocation; Termination The Form 2553 instructions lay out a specific late-election procedure, generally available if fewer than three years and 75 days have passed since the intended effective date and the failure was solely due to the late filing.14Internal Revenue Service. Instructions for Form 2553 If you realize the window is closed, file Form 2553 with a reasonable-cause explanation attached rather than waiting a full year.
What California Costs Every Year
California taxes every S corporation with California-source income at a 1.5% rate on net income. On top of that, every S corporation owes an $800 annual minimum franchise tax, due in the first quarter of each accounting period regardless of whether the business turns a profit.1Franchise Tax Board. S Corporations
New corporations get one break. California waives the $800 minimum franchise tax for newly formed S corporations in their first taxable year. Net income earned during that first year is still subject to the 1.5% tax, but the flat $800 is off. From year two forward, the $800 applies every year, including years the corporation is inactive or loses money.15Franchise Tax Board. Corporations
The timing takeaway: if you form the corporation in December but don’t start operating until January, you burn your first-year exemption on an empty taxable year. Incorporating in January instead often makes the exemption worth something.
Your annual California return is Form 100S with the Franchise Tax Board, due the 15th day of the third month after your tax year closes (March 15 for calendar-year filers).16Franchise Tax Board. Due Dates: Businesses Federally you file Form 1120-S on the same date and deliver a Schedule K-1 to every shareholder. Failing to furnish a timely and accurate K-1 can trigger a $340 penalty per shareholder.17Internal Revenue Service. Instructions for Form 1120-S (2025)
Pay Yourself Reasonable Compensation
A major tax draw of S corporation status is that profits distributed to shareholders as distributions aren’t subject to Social Security and Medicare taxes. The IRS is aware of the incentive and requires every shareholder who works in the business to receive reasonable compensation as W-2 wages before taking any distributions.18Internal Revenue Service. S Corporation Compensation and Medical Insurance Issues
Reasonable means what you’d pay someone else to do the same job. The IRS weighs your training and experience, your duties and hours, what comparable businesses pay for similar roles, and how much of the company’s revenue comes from your personal efforts versus employees or equipment.18Internal Revenue Service. S Corporation Compensation and Medical Insurance Issues Paying yourself nothing or a token salary while taking large distributions is the fastest way to attract an audit. If the IRS reclassifies your distributions as wages, you’ll owe back employment taxes on the entire reclassified amount plus accuracy penalties and interest.
Payroll is not optional for an S corp with active shareholders. You have to withhold income taxes and FICA from each shareholder-employee’s wages and file quarterly payroll tax returns. Many owners outsource this to a payroll service, which typically runs a few hundred dollars a year for a single-employee corporation.
Protect the Election and the Liability Shield
An S corporation’s tax status is fragile. One stock transfer to an ineligible holder (a non-resident alien, another corporation, or a 101st shareholder) terminates the election. A shareholder agreement, sometimes called a buy-sell agreement, protects against this by requiring shareholders to notify the corporation before any transfer and giving the corporation the right to block or void one that would jeopardize the election. Stock certificates should reference these restrictions directly so no buyer can claim ignorance. An indemnification clause protecting the remaining shareholders from the fallout of a terminated election adds another layer.
Corporate liability protection also isn’t automatic just because you filed paperwork. Courts can pierce the corporate veil and hold shareholders personally liable when the corporation is treated as an extension of its owners. Hold annual shareholder and director meetings, keep written minutes of major decisions, keep corporate records and financial ledgers separate from personal ones, follow your bylaws, and file every required annual report. None of it is hard, but skipping it steadily erodes the legal wall between you and the corporation.