How to Start an S Corp in California: A Step-by-Step Guide

California is one of the most popular states for S corp election. However, it’s also one of the states where the process is a little more complicated. S corp election is a common choice for California business owners looking to reduce their self-employment tax burden, but the state layers its own rules on top of the federal ones, including an LLC franchise tax California that most other states don’t have. 

Starting an S corp in California requires you to understand and follow two sets of rules: the federal S corp rules set by the IRS, and California’s franchise tax requirements administered by the Franchise Tax Board.

This guide covers what a California S corp is, how to form one, what it costs, and the ongoing obligations you’ll take on. For a general guide on S corp election, check out our separate article on what is an S corp. In this one, we’ll be focusing on what makes creating an S corp in California different. 

What is an S corp in California?

Rather than being a separate business structure (which is often what people assume), an S corp is a tax election. You first form a corporation or create an LLC in California, then elect S corp status with the IRS. Once the election is in place, the business is taxed as a pass-through entity. What this means is that income flows through to the shareholders’ personal tax returns instead of being taxed at the corporate level. That avoids the double taxation that applies to C corporations and allows owner-employees to split their income between salary and distributions, which is where the self-employment tax savings come from.

In California, however, there is a key difference. Unlike most states, California imposes a 1.5% franchise tax on the S corp’s net income, paid by the business itself, on top of the personal income tax shareholders pay on their share of the profits. California also charges a minimum franchise tax of $800 per year starting in the corporation’s second taxable year, which applies even in years when the business earns little or nothing. New corporations are exempt from the $800 minimum in their first year under Cal. Rev. & Tax Code § 23153(f), though the 1.5% tax on net income still applies in year one if the business is profitable.

These state-level taxes don’t erase the federal savings, but they do shrink them. An S corp election that clearly pays off in Texas or Florida may only break even in California. Before you file anything, have a CPA who knows California tax law run the math on your specific situation, because the calculation is significantly different than it is in most states.

How to form an S corp in California: step by step

If you decide that a California S corp makes sense for your business after running the numbers, here is the step-by-step process you can follow to elect S corp status in California: 

Step 1: Form the underlying entity

Because an S corp is a tax election, the business must exist as a corporation or LLC before you can elect S corp status.

If you’re forming a corporation, you’ll file Articles of Incorporation with the California Secretary of State through the BizFile Online system. You’ll need a compliant business name, a California registered agent with a CA street address, and an initial stock structure for issuing shares to owners.

If you already run an LLC, you don’t need to form a new entity. The S corp election sits on top of your existing LLC structure. The only thing that changes is how it is taxed. 

Step 2: Obtain an EIN

An Employer Identification Number (EIN) is your business’s federal tax ID, and it’s required to file tax returns, open a business bank account, and run payroll. If you’re wondering how to get an EIN number, Tailor Brands can help you with that.

Step 3: File Form 2553 with the IRS

Form 2553 is the official S corp election, and filing it with the IRS is what converts your corporation or LLC into an S corp for federal tax purposes.

Timing is important when filing this form. The form must be filed within 75 days of the start of the tax year you want the election to cover, or within 75 days of forming a new entity. If you miss the window, the election generally won’t take effect until the following tax year.

Step 4: File Form 100S with the California Franchise Tax Board

California requires its own S corp tax return in addition to the federal Form 1120-S. Form 100S is filed annually with the Franchise Tax Board, and it’s where the 1.5% franchise tax on net income is calculated and paid, along with the $800 minimum. Every California S corp files this return every year, regardless of income.

Step 5: File a Statement of Information

California corporations must file a Statement of Information with the Secretary of State within 90 days of formation, and every year after that. The filing covers basic business details such as the corporation’s name and address, its directors and officers, and its registered agent. The filing fee is currently $25 for corporations, and missing the deadline can trigger a $250 penalty.

Step 6: Set up payroll

If you own the business and work in it, the IRS requires you to pay yourself a reasonable salary through formal payroll before taking profit distributions. That means wage withholding, payroll tax deposits, and quarterly and annual payroll filings.

California adds its own requirements on top of this. The state’s Employment Development Department (EDD) administers separate payroll taxes, including state income tax withholding, unemployment insurance, and state disability insurance. You’ll need to register with the EDD and file California payroll returns on top of your federal obligations. Given the complexity, most California S corp owners hand payroll off to a provider or CPA.

Step 7: Adopt bylaws and hold initial board meeting

All California corporations, including S corps, are required to observe corporate formalities such as adopting bylaws, holding an initial board of directors meeting, appointing officers, issuing stock to shareholders, and documenting all of it in written minutes. Maintaining these formalities helps preserve your liability protection and keeps the corporation in good standing with the state.

How much does it cost to start an S corp in California?

There are both one-time and ongoing costs that come with starting an S corp in California, including: 

• Articles of Incorporation filing fee: $100, paid to the California Secretary of State.
• Statement of Information: $25 for the initial filing and each annual filing after that.
• $800 minimum franchise tax: due starting your second taxable year and every year after that, regardless of income or activity. First-year corporations are exempt from this minimum under state law, though the 1.5% net income tax can still apply in year one.
• 1.5% franchise tax on net income: owed once the calculated amount exceeds the $800 minimum.
• Registered agent service: typically $100 to $300 per year if you use a professional service.
• Payroll setup and processing: costs vary by provider, but expect an ongoing monthly service fee.
• CPA and accounting fees: California S corp compliance is more involved than in most states, and professional help is strongly recommended.

The $800 minimum deserves emphasis because it’s the number that surprises people. It applies even if your S corp earns nothing in a given year. State fees also change periodically, so verify the current amounts with the California Secretary of State and the Franchise Tax Board before you file.

California S corp requirements and ongoing obligations

Forming the S corp is only the first step in the process. 

Each year, a California S corp must handle:

• The annual Form 100S filing with the Franchise Tax Board
• The annual Statement of Information with the Secretary of State
• The $800 minimum franchise tax (exempt in the corporation’s first taxable year).
• The 1.5% franchise tax on net income
• Annual shareholder and director meetings, with minutes kept on record
• Reasonable salary payments to owner-employees through formal payroll
• California EDD payroll tax filings and deposits

California enforces these requirements more aggressively than many states. Falling behind can lead to penalties and potentially having your business suspended. 

California S corp pros and cons

The S corp structure has real advantages, but California’s rules can change the calculation for many business owners. Here are the top advantages and considerations you should be aware of: 

Advantages 

• Pass-through taxation. Income flows to shareholders’ personal returns, avoiding the double taxation that hits C corporations.
• Self-employment tax savings. Owner-employees pay Social Security and Medicare taxes only on their reasonable salary, not on distributions. This is the core S corp advantage.
• Liability protection. Shareholders’ personal assets are generally shielded from business debts and lawsuits.
• Credibility. A formal corporate structure signals stability to clients, vendors, and lenders.

Considerations

• The 1.5% franchise tax takes a bite out of the federal savings that S corp owners in most other states keep in full.
• The $800 minimum applies no matter what, making the structure expensive for early-stage or low-profit businesses.
• Heavier compliance. Between payroll, corporate formalities, and dual federal and state filings, a California S corp demands more administration than a standard LLC.
• A higher break-even point. Because of the added state costs, the profit level at which an S corp starts saving you money is higher in California than elsewhere.

Who should consider a California S corp?

S corp election tends to make sense for California business owners with consistent net profits of around $80,000 to $100,000 or more per year, and the state’s added costs push that threshold higher than in states without a franchise tax. 

The structure is less favorable for early-stage businesses with low or unpredictable income, since the $800 minimum and the 1.5% franchise tax apply regardless. It works best for owner-operators who can pay themselves a defensible salary and take the remaining profit as distributions, because that split is where the tax advantage comes from. 

If the numbers work for you, the paperwork shouldn’t be the obstacle. Tailor Brands helps with S corp formation and election, handling the filing steps so California business owners can get set up correctly from the start.

Conclusion 

Starting an S corp in California means working through both federal and state requirements such as forming the entity, electing S corp status with the IRS, and then meeting California’s franchise tax, payroll, and reporting obligations year after year. The state’s 1.5% franchise tax and $800 minimum make a California S corp more complex and more expensive than an S corp almost anywhere else.

The tax savings can still be well worth it, but only after a careful analysis of your income, salary, and costs. Talk to a CPA to run the numbers, and consider a business attorney for questions about corporate formalities and compliance. With the right advice and a clean setup, an S corp can still be one of the most effective tax moves available to a profitable California business.

FAQ