How to Form an S-Corp in California (and What It Costs)

Forming an S-corp in California takes two separate filings — one with the California Secretary of State to create the legal entity, and one with the IRS to elect S-corp tax status. Government fees to get started run roughly $100–$200, but the number that surprises most people is California's $800 minimum franchise tax, which applies every year the entity is active.

What is an S-corp, exactly?

An S-corp isn't a separate business structure — it's a federal tax election. You form a California corporation or LLC at the state level, then ask the IRS to treat it as an S-corporation under Subchapter S of the Internal Revenue Code.

The core benefit: profits pass through to the owner's personal return (no double taxation at the corporate level), and distributions beyond a reasonable W-2 salary are not subject to the 15.3% self-employment tax. For a profitable small business, that difference can be substantial. If you're still weighing whether the election makes financial sense, tax planning is a smart first step before you file anything.

Step 1: Form the entity with the California Secretary of State

You have two options for the underlying legal entity:

Option A — California Corporation File Articles of Incorporation with the Secretary of State. The current state filing fee is $100. You'll also file a Statement of Information within 90 days of incorporation ($25), then biennially after that.

Option B — California LLC File Articles of Organization with the Secretary of State. LLC filing fees in California have changed in recent years — verify the current amount at sos.ca.gov before filing. An initial Statement of Information ($20) is due within 90 days, then annually.

Either entity can hold an S-corp election. Most tax professionals default to the corporation route for S-corp purposes because the fee structure tends to be simpler, but an LLC election works too.

After filing, you'll also need:

An Employer Identification Number (EIN) from the IRS — free, applied for at irs.gov
A registered agent in California (yourself or a third-party service)
Corporate bylaws or an LLC operating agreement

Step 2: File IRS Form 2553 for the federal election

Once the entity exists, file Form 2553 (Election by a Small Business Corporation) with the IRS. There is no filing fee.

Timing is the part people miss. To make the election effective for the current tax year, you must file Form 2553 no later than two months and 15 days after the start of that tax year — for a calendar-year entity, that's March 15. A newly formed entity has the same window from its start date.

Miss the deadline and you default to C-corp taxation (or disregarded entity status for an LLC) for that year. Late elections are sometimes granted for reasonable cause, but getting it right the first time is cleaner. For a full breakdown of the relevant calendar, S-corp filing deadlines for Palmdale small businesses covers the key dates.

Does California require its own S-corp election?

Yes. California requires a separate state-level election using FTB Form 3560, filed with the Franchise Tax Board — not the Secretary of State. There is no additional fee, and California will generally follow the federal election, but the form is still required. Forgetting it is a common and avoidable mistake.

What does it cost to form an S-corp in California?

Here's a realistic cost breakdown at formation:

| Item | Approximate cost |
|---|---|
| Secretary of State filing (corporation) | $100 |
| Statement of Information | $25 |
| EIN (IRS) | Free |
| IRS Form 2553 (S-corp election) | Free |
| FTB Form 3560 (state S-corp election) | Free |
| Registered agent service (optional) | $50–$300/year |
| Government fees total | ~$125 |

Professional fees for setup — forming the entity, drafting bylaws, handling the elections — typically run $500–$1,500 or more depending on complexity. See SBZ Tax's pricing for what the ongoing tax side looks like.

What ongoing costs should California S-corps expect?

California imposes more ongoing costs on S-corps than most states. Plan for these every year:

$800 minimum franchise tax. Every active California S-corp pays at least $800 per year to the FTB, regardless of profit or loss.

1.5% S-corp franchise tax on net income. If annual net income exceeds roughly $53,000, the 1.5% rate produces a tax bill above $800, and you pay the higher amount.

Statement of Information. Corporations file biennially ($25). LLCs file annually ($20).

Payroll. Once the election takes effect, the owner-employee must receive a reasonable W-2 salary. That means payroll setup, quarterly Form 941 filings, and year-end W-2s. Solid monthly bookkeeping services built for S-corps keep payroll tax deposits on schedule and the books reconciled throughout the year.

Annual business tax returns. The S-corp files Form 1120-S federally and Form 100S in California — both separate from the owner's personal return. S-corp and business tax services typically bundle these filings together.

Who should actually form an S-corp in California?

Not everyone. The election trades paperwork for tax savings, and the math only works above a certain income level.

The $800 annual minimum, payroll compliance, and a second tax return mean you need enough profit to justify the overhead. A general threshold many advisors use: the election tends to pencil out when net profit consistently exceeds $40,000–$50,000 per year. Below that, the savings often don't cover the complexity.

For businesses with multiple owners, planned outside investment, or complex financials, working through entity structure with a fractional CFO before formation can prevent expensive restructuring down the road.

What comes right after formation?

Once both elections are filed, the immediate to-do list is:

Open a dedicated business bank account
Set up payroll before drawing any compensation
Build out a chart of accounts and get bookkeeping running
Make your first quarterly estimated tax payment if California income taxes will be owed — see quarterly estimated taxes for self-employed taxpayers for the payment schedule

Getting the infrastructure in place early is far easier than catching up mid-year when the records are scattered.

Book a free consultation if you want to talk through whether the S-corp election makes sense for your business before starting the paperwork.

This is general information, not tax advice for your specific situation. Filing fees, tax rates, and deadlines are subject to change — verify current figures with the California Secretary of State, IRS, and FTB before taking action. Consult a tax professional for guidance tailored to your circumstances.

Frequently asked questions

Can I elect S-corp status for my existing LLC in California?

Yes. An existing California LLC can file IRS Form 2553 and FTB Form 3560 without changing the underlying legal entity. The LLC stays an LLC at the state level — only the tax treatment changes. The same timing rules apply.

What is the deadline to file Form 2553?

For a calendar-year entity, Form 2553 must reach the IRS by March 15 to be effective for that tax year. New entities have two months and 15 days from their formation date. California's FTB Form 3560 follows the same general timing. The IRS does not grant late elections automatically — they require a reasonable-cause statement.

Do California S-corps pay the $800 franchise tax every year?

Yes. The $800 minimum franchise tax applies to every active California S-corp each year, regardless of profit. It's an annual floor, not an income-based calculation, and it's one of the main reasons the election doesn't benefit businesses with low net income.

How long does California S-corp formation take?

Secretary of State processing times vary — check sos.ca.gov before you start, as expedited processing is available for an additional fee. The IRS typically processes Form 2553 within 60 days, though the election date is tied to when you file, not when confirmation arrives. Budget several weeks to a few months for the full process.

What happens if I miss the S-corp election deadline?

The entity defaults to C-corp or disregarded-entity tax treatment for that year. The IRS may grant a late election when the failure was inadvertent and the entity otherwise acted as an S-corp throughout the year. A tax professional can evaluate whether a late election is available and prepare the reasonable-cause statement required to request it.