"S-corp" is not a type of entity — it is a tax election that an eligible corporation or LLC makes with the IRS. Done at the right time, for the right business, it can meaningfully reduce self-employment taxes. Done late, or for an ineligible entity, it creates a mess that takes professional fees to unwind. Here is how the election works, the deadline that trips people up, and how California treats it.
What the election actually does
By default, a corporation is taxed under subchapter C — the entity pays corporate income tax, and shareholders pay tax again on dividends. An S election under subchapter S eliminates the entity-level federal income tax: profits and losses pass through to shareholders' personal returns. For an LLC, the comparison is different: LLC profits already pass through, but an owner active in the business generally pays self-employment tax on the whole profit. With an S election, the owner takes a reasonable salary (subject to payroll taxes) and can receive remaining profits as distributions that are not subject to self-employment tax. That salary must genuinely be reasonable for the work performed — paying yourself a token wage to maximize distributions is a well-known audit issue, not a strategy.
Who is eligible
Not every business can elect S status. The requirements include:
- A domestic corporation (or an LLC electing to be taxed as a corporation);
- No more than 100 shareholders;
- Only permitted shareholders — individuals who are U.S. citizens or residents, certain trusts, and estates. Partnerships, corporations, and nonresident aliens cannot hold shares;
- Only one class of stock (differences in voting rights are allowed, but not differences in distribution or liquidation rights).
That single-class-of-stock rule is why startups planning to raise venture capital — which requires preferred stock and often entity investors — should generally not elect S status, or should plan for the election to terminate at the first financing.
The deadline: two months and fifteen days
The election is made on IRS Form 2553, with the consent of all required shareholders. For the election to take effect for a given tax year, Form 2553 must be filed no more than two months and 15 days after the beginning of that tax year. Two common scenarios:
- New entity. A corporation formed on February 1 with a calendar tax year must file by April 15 (or the applicable date counted from its first day of existence) for the election to apply from day one;
- Existing entity. A calendar-year business that wants S status starting January 1, 2027 must file Form 2553 by March 15, 2027. File later, and the election takes effect the following year — unless relief applies.
Missed deadlines are common enough that the IRS created a streamlined fix: Revenue Procedure 2013-30 allows late-election relief, generally for up to three years and 75 days, if the business intended to elect on time, has reasonable cause, and all shareholders report their taxes consistently with the election. Relief is routinely granted on clean facts, but it is a remedy — not a substitute for calendaring the deadline.
What California does with your election
California recognizes the federal S election automatically; no separate state election is filed. But S status is not free at the state level. California S corporations pay a franchise tax of 1.5% of net income, generally with an $800 minimum, and shareholders also pay personal income tax on the pass-through income. An LLC taxed as an S corporation trades the LLC fee based on total income for the 1.5% tax — which regime costs less depends on your margins, and it is exactly the kind of math to run with your CPA before electing. The choice of underlying entity matters too: whether the S election sits on a corporation or an LLC affects governance, formalities, and future flexibility, which is part of the entity formation decision, not just a tax checkbox.
When the election makes sense — and when it does not
The S election tends to pay off for profitable owner-operated businesses with income comfortably above a reasonable salary for the owner's work — the payroll-tax savings then exceed the added costs of payroll processing, a separate tax return, and California's 1.5% tax. It tends not to make sense for early-stage businesses with modest profits, companies seeking outside investment, or owners who need flexible profit-sharing arrangements that the one-class-of-stock rule prohibits. Elections can also terminate inadvertently — a transfer of shares to an ineligible holder is enough — so buy-sell restrictions in your governing documents should protect the election once it is made.
Talk to a California business attorney
The right time to think about an S election is when the entity is being structured, not at tax time. Itkin Law coordinates entity choice, governing documents, and election timing with your tax advisor. Schedule a free consultation or call (949) 418-2113.
This article is attorney advertising and provides general information only. It is not legal advice and does not create an attorney–client relationship. Facts matter; consult a lawyer about your specific situation.
