"Should I be an S corp?" is the most-asked tax question in small business, and it rests on a misunderstanding worth clearing first: there is no such company. The S corporation is a chapter of the tax code (Subchapter S), a status a real entity elects with the IRS. Your company stays an LLC or a corporation at the state level forever; the election changes only how the IRS taxes it. That one clarification reorganizes the whole decision.
What the Status Actually Does
S taxation has two defining properties. First, pass-through treatment: the company files an informational return (Form 1120-S) and issues K-1s, but pays no federal income tax itself; profits land once, on the owners' returns. In that respect it matches a default LLC. Second, and this is the entire practical point for small business: owner-employees are paid a salary through payroll, and profit above that salary flows out as distributions that are not subject to the 15.3% self-employment/FICA tax that a default LLC owner pays on everything.
Worked briefly: $140,000 of profit as a default single-member LLC bears self-employment tax on essentially all of it. The same company with an S election and a defensible $75,000 salary pays payroll taxes on the salary and nothing of the kind on the remaining $65,000. Gross FICA savings run roughly $8,000 to $9,000; net savings after payroll service, the extra return, and any state-level costs land a few thousand lower. The calculator runs your numbers, and the salary side has its own rules covered in the reasonable salary guide.
The Eligibility Box
Subchapter S trades its benefits for restrictions: no more than 100 shareholders, all US individuals (plus certain trusts and estates; no partnerships, corporations, or nonresident alien owners), and a single class of stock (voting differences are allowed; economic differences are not). The restrictions explain the sorting of American business: venture-backed startups cannot live in the box (preferred stock, entity investors) and choose C corporations; profitable owner-operated businesses fit easily and elect S. The comparison in full: C corp vs S corp and LLC vs S corp.
What the Election Costs You
The savings buy obligations, and underestimating them is the classic error. Payroll becomes mandatory: the owner is an employee, with registrations, deposits, and filings (the payroll guide covers the machinery). The salary must be defensible as market-rate compensation, documented, and revisited as profits grow. A separate return (1120-S, due March 15) joins the calendar, and some states add entity-level costs: California taxes S corps 1.5% of net income, and a few states do not recognize the election at all for state purposes. Below roughly $60,000 to $80,000 of consistent profit, this overhead outruns the savings, which is why electing early is the most common S corp mistake.
S Corp vs the Alternatives, in One Pass
Vs default LLC: identical liability protection (the entity is unchanged), identical single layer of tax; the S election adds the salary/distribution split and its overhead. Elect when profit justifies it, not before (the tax guide maps the whole terrain).
Vs C corp: C pays 21% at the entity and again on dividends, in exchange for unlimited owners, preferred shares, and retained earnings at the corporate rate. S taxes once within the eligibility box. Investors force the choice one way; owner-operators nearly always prefer the other.
Vs staying a sole proprietorship: no entity, no shield, same self-employment tax as a default LLC. The upgrade path runs proprietorship to LLC to S election, each step triggered by real revenue, real risk, and real profit respectively (the first step compared).
A tax lane, entered on purpose
The S corp is a status your LLC elects when consistent profit makes the salary-plus-distributions split worth its overhead. Form the entity first, let the numbers mature, run the calculator, and enter the lane with the salary documentation that keeps you in it.
Frequently asked questions
What is an S corp in simple terms?
A federal tax status, elected on Form 2553, under which the IRS taxes a company's profits once, on the owners' personal returns, and lets owner-employees take part of their income as distributions free of self-employment tax. The underlying company remains what it was: an LLC or a corporation. See the election guide.
Is an S corp a type of business entity?
No, and the confusion costs people money. You cannot form an S corp at a state office; you form an LLC or corporation there, then elect S taxation with the IRS. "LLC taxed as an S corp" is the most common real-world configuration for small businesses.
How does an S corp save money?
One mechanism: self-employment tax. A default LLC owner pays 15.3% on all active profit. An S corp owner takes a reasonable salary (taxed normally with payroll taxes) and receives remaining profit as distributions exempt from that 15.3%. The savings is the FICA gap above the salary, minus payroll and filing overhead.
Who qualifies for S corp status?
Domestic entities with 100 or fewer shareholders, all US individuals (plus certain trusts and estates: no corporations, partnerships, or nonresident aliens as owners), and one class of stock. Most small LLCs and corporations qualify easily; venture-backed companies with preferred shares do not.
When does the S corp election make sense?
The working threshold is consistent net profit around $60,000 to $80,000: below it, payroll service costs and the separate 1120-S return eat the savings. Timing matters too: for an existing company the election is generally due by March 15 of the year it should take effect. Run your numbers in the savings calculator.
S corp vs C corp: what is the difference?
C corps pay the 21% corporate tax and shareholders pay again on dividends: double taxation, in exchange for unlimited owners, preferred stock, and investor-friendliness. S corps tax once but live within the eligibility limits. Startups raising venture capital choose C; profitable small businesses overwhelmingly prefer S. See the full comparison.
Can I undo an S corp election?
Yes: revocation with majority shareholder consent, or termination by breaking an eligibility rule. But a revoked election generally cannot be re-made for five years, so treat the decision as semi-permanent and elect when profits genuinely support it rather than experimenting.
Run the election properly.
Form 2553 prepared and filed on time, with reasonable-salary guidance and the payroll checklist that keeps the savings defensible.
