Key Takeaways

• An “S Corp” is not a separate type of business. It is a tax election that an LLC or a corporation can make with the IRS.
• The main draw is self-employment tax. An S Corp lets owners split income between a salary (subject to payroll taxes) and distributions (generally not), which can lower the total tax bill.
• The election comes with real obligations: you must run payroll, pay yourself a “reasonable” salary, and file a separate S Corp return.
• California layers on its own cost. An S Corp pays a 1.5% state franchise tax on net income, with the same $800 minimum that other entities owe.
• The election tends to pay off once profits are high enough that the payroll-tax savings outweigh the added payroll and accounting costs. Below that level, it often is not worth the trouble.

LLC vs. S Corp in California: The Tax Differences That Actually Matter

A lot of California business owners hear “you should be an S Corp” and assume it means tearing down their LLC and starting over. It does not. Understanding what an S Corp actually is clears up most of the confusion, and from there the real question, whether the election saves you money, gets a lot easier to answer.

First, clear up the biggest misconception

An LLC is a legal entity. An S Corp is a tax status. They are not competing structures; they live on different layers.

When you form an LLC in California, you have a legal entity. By default, the IRS taxes that LLC as a sole proprietorship (if you are the only owner) or a partnership (if there are several). You can instead ask the IRS to tax your LLC as an S corporation by filing the right election. Your LLC stays an LLC under California law; only its tax treatment changes.

So “LLC vs. S Corp” is really “LLC taxed the default way vs. LLC (or corporation) taxed as an S Corp.” Once you see it that way, the comparison is about tax mechanics, not about which legal form to choose.

How the tax difference works

Here is the heart of it. If your LLC is taxed the default way, all of the business’s net profit is generally subject to self-employment tax, which covers Social Security and Medicare. That tax applies to the whole profit, not just the portion you take home as a paycheck, because as a sole proprietor or partner you do not really have a paycheck.

When your LLC elects S Corp treatment, the picture changes. You become an employee of your own business. You pay yourself a salary, and that salary is subject to payroll taxes. The remaining profit comes to you as a distribution, which is generally not subject to self-employment or payroll tax. That split is where the savings live.

A simplified, hypothetical example shows the idea. Suppose a business nets $120,000. Taxed the default way, roughly that entire amount is exposed to self-employment tax. As an S Corp, the owner might pay themselves a $70,000 salary (subject to payroll tax) and take the remaining $50,000 as a distribution (generally not subject to it). The self-employment/payroll tax on that $50,000 difference is what the owner potentially saves. These figures are illustrative only, not a prediction for your business, the actual outcome depends entirely on your own numbers, your reasonable-salary figure, and your circumstances, so run your specific situation by a CPA before relying on any of it.

Why owners often keep the LLC and just elect S Corp status

A point that trips people up: you do not have to choose between the simplicity of an LLC and the tax treatment of an S Corp. You can have both. Many California owners form an LLC for its lighter legal formalities, then elect S Corp taxation once profits justify it. The LLC still skips the board meetings, minutes, and stock records that a corporation must maintain, while the income gets taxed under S Corp rules. You get the administrative ease of the LLC on the legal side and the salary-plus-distribution split on the tax side.

This also means the timing is flexible. You are not forced to make the election the day you form. A common pattern is to start as a default-taxed LLC while profits are modest, then file the S Corp election in a later year once the savings clearly outweigh the added payroll and accounting costs. Because the election has timing rules, plan the switch with your accountant rather than filing at the last minute.

The catch: ‘reasonable compensation’

The salary piece is not a free lever you can set to zero. The IRS requires S Corp owner-employees to pay themselves “reasonable compensation” for the work they actually do, judged against what a similar role would pay in the market. Set your salary artificially low to dodge payroll tax, and you invite an audit and back taxes with penalties. A defensible salary is the price of admission for the distribution savings, and getting it right is one of the main reasons S Corp owners work with an accountant.

What the S Corp election requires of you

The election is not just a form you file and forget. It comes with ongoing obligations:

• Run payroll. You must set up payroll, withhold taxes, and file payroll tax returns, both federal and California (through the EDD). Most owners use a payroll service for this.
• Pay a reasonable salary. As above, documented and defensible.
• File a separate tax return. An S Corp files its own federal return (Form 1120-S) and a California return (Form 100S), separate from your personal return. That usually means higher accounting fees.
• File the election on time. The S Corp election (Form 2553) has timing rules. Miss the window and you may have to wait, though late-election relief sometimes applies.

None of this is exotic, but it is real administrative weight that a default LLC does not carry.

Do not forget the California layer

This is where California businesses get surprised. Electing S Corp status helps with federal self-employment tax, but California does not give S corporations a free pass. As of this writing, California imposes a 1.5% franchise tax on an S corporation’s net income, with the same $800 annual minimum that applies to other entities. So part of your federal savings is offset at the state level. A standard LLC taxed as a partnership or sole proprietorship does not pay that 1.5%, though it does pay the $800 minimum and, above a revenue threshold, the LLC gross-receipts fee. Because these rates and amounts can change, confirm the current California treatment with a CPA or the Franchise Tax Board before you decide.

So is the S Corp election worth it?

It comes down to whether the self-employment tax savings beat the added costs of payroll, a separate return, and California’s 1.5%. That math turns on profit. At low profit levels, the savings are small and the added costs eat them up, so the election frequently is not worth it. As profit climbs, the savings on the distribution portion grow, and at some point they comfortably clear the extra costs. Many advisors describe a rough profit range where the election starts to make sense, but the honest answer is that it depends on your specific numbers, your reasonable-salary figure, and how much you value simplicity.

This is a decision worth running with both a CPA and an attorney, because the tax math and the legal setup go hand in hand. Bay Legal works alongside your tax advisor to structure the election cleanly. For guidance on your specific situation, call (650) 668-8000 or schedule a consultation at baylegal.com/contact.

The bottom line

If your LLC is modestly profitable and you value simplicity, staying with default taxation is often the easier and cheaper path. If your profit is consistently strong and you are comfortable running payroll and filing a separate return, the S Corp election can put real money back in your pocket, even after California takes its 1.5%. The structure stays the same; what changes is how the income is taxed.

For guidance on your specific situation, call (650) 668-8000 or schedule a consultation at baylegal.com/contact.

Frequently Asked Questions

What is the difference between an LLC and an S Corp for tax purposes in California?

An LLC is a legal entity; an S Corp is a tax election. A default-taxed LLC generally exposes all net profit to self-employment tax. An LLC that elects S Corp treatment splits income into a salary (subject to payroll tax) and distributions (generally not), which can lower the total tax. California also imposes a 1.5% franchise tax on S corporations that a default LLC does not pay.

Can a California LLC elect S Corp tax treatment?

Yes. An LLC can file IRS Form 2553 to be taxed as an S corporation while remaining an LLC under California law. Only the tax treatment changes, not the legal structure.

How does self-employment tax differ between an LLC and an S Corp?

With a default-taxed LLC, net profit is generally subject to self-employment tax in full. With an S Corp, only the owner’s salary is subject to payroll tax; the remaining profit taken as a distribution is generally not, which is the source of the potential savings.

What are the payroll requirements if you elect S Corp status in California?

You become an employee of your business and must run payroll, withhold and remit federal and California payroll taxes (through the EDD), file payroll tax returns, and pay yourself a reasonable salary for the work you perform.

Is an S Corp election worth it for a small California business?

It depends on profit. The election adds payroll and accounting costs and triggers California’s 1.5% franchise tax, so at lower profit levels it frequently is not worth it. As profit rises, the self-employment tax savings can outweigh those costs. Run the numbers with a CPA.