The tax math behind LLC vs. S-Corp for California startups
Founders choosing between an LLC and S-Corp face different tax bills from day one. The right choice depends on income level, not just liability protection.
Choosing between an LLC and S-Corp is not primarily a liability question. It is a tax question, and the answer changes depending on how much money the business makes. An LLC owner pays self-employment tax on every dollar of profit. An S-Corp owner pays it only on their salary, potentially saving thousands annually. But that savings vanishes if the business loses money or takes in less than $70,000 a year, and the IRS watches S-Corp owners closely to prevent abuse.
California's startup founders must also contend with state-level taxes that federal law does not impose. The choice between an LLC and S-Corp has no single correct answer, but understanding the tradeoffs prevents expensive mistakes.
How California taxes LLCs and S-Corps differently
California charges LLCs an $800 annual franchise tax, the same as other business entities. But LLCs also pay a gross receipts fee—also called an LLC tax—based on the amount of revenue the business brings in. The fee starts at $900 for revenues between $250,000 and $500,000, rises to $2,500 for revenues between $500,000 and $1 million, and keeps climbing from there. For a bootstrapped startup with under $250,000 in annual revenue, the LLC fee is just the $800 minimum.
S-Corporations in California pay the same $800 annual minimum, or 1.5 percent of their net income, whichever is larger. Unlike LLCs, S-Corps do not pay additional fees based on gross revenue; the tax rate stays at 1.5 percent regardless of how much money the business brings in. For a high-revenue, low-profit business—a service firm with large expenses, for instance—an S-Corp can cost substantially less than an LLC.
The self-employment tax wedge
The bigger tax difference between LLCs and S-Corps lives at the federal level, in self-employment tax. LLC members pay self-employment tax—Social Security and Medicare—on their entire share of the business's profits. That rate is 15.3 percent. So if an LLC makes $100,000 in profit, the owner owes approximately $15,300 in self-employment tax on top of federal and state income taxes.
The rest of the profits can be taken as distributions, which avoid self-employment tax entirely. An S-Corp owner earning $100,000 in profit might pay themselves a $60,000 salary and take $40,000 in distributions, paying self-employment tax on only the salary portion. This structure can save $3,000 to $6,000 per year for a modestly profitable business, and substantially more for higher-earning owners.
The catch is the IRS requirement for reasonable compensation. S-Corp owners must pay themselves a salary that matches what similar businesses pay for similar work. The IRS audits S-Corps that appear to undercompensate owners while distributing large amounts of profit, and penalties for mischaracterizing compensation can reach 100 percent of the unpaid taxes. Since 2024, the California Franchise Tax Board has heightened scrutiny of S-Corp compensation structures.
When each structure saves money
The self-employment tax savings do not offset the administrative burden of maintaining an S-Corp's salary and distribution structure.
A service business earning substantial profits can reduce its total federal and state tax bill by electing S-Corp status.
For high-revenue, low-margin businesses—think consulting firms or agencies with large payroll and operating expenses—the S-Corp's 1.5 percent net income tax can be far cheaper than an LLC's gross receipts fees. A business with $2 million in revenue but only $100,000 in profit would pay $2,500 to $6,000 in LLC fees based on revenue, versus $1,500 on the S-Corp's 1.5 percent tax on profit.
“An S-Corp owner earning $100,000 in profit might pay themselves a $60,000 salary and take $40,000 in distributions, paying self-employment tax on only the salary portion.”
What matters most for founders seeking capital
Neither LLCs nor S-Corps are ideal for startups that plan to raise venture capital. Venture investors insist on C-Corporation structures because C-Corps can issue multiple classes of stock—common stock and preferred stock—allowing investors to have preferred liquidation rights, anti-dilution protections, and other contractual benefits that S-Corps and LLCs cannot provide. S-Corps and LLCs have only one class of ownership, which creates tax complications for venture funds with tax-exempt or foreign limited partners.
A startup founded as an LLC or S-Corp that later raises venture funding will need to convert to a C-Corp, triggering potential tax bills and ownership complexity. Founders planning any serious fundraising should incorporate as a C-Corp from the start, even though C-Corps face double taxation at the federal level (corporate tax plus shareholder tax on dividends), and accept paying the higher tax bill as the price of access to capital.
The operational difference
An LLC's operating agreement can be customized extensively, with flexible profit-sharing arrangements and minimal governance requirements. An S-Corp requires formal corporate governance: a board of directors, annual shareholder meetings, and documented decisions. While this formality protects directors and shareholders from personal liability in edge cases, it means more paperwork and compliance work.
LLCs offer more relaxed operational rules than S-Corps and C-Corps, with no requirement to hold formal meetings or maintain detailed minutes.
