"Should I be an S corp?" is the most-asked tax question in small business. 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 under IRC 1362. 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. 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. It pays 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. 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). That list is not folklore; it is the definition of a small business corporation in IRC 1361(b)(1). 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.
File your S-corp election
We prepare it, file it with the agency, and confirm it came back accepted. Or keep reading and file it yourself; this guide covers both.
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, it offers 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).
The 2026 Numbers Behind the Election
The whole case for S taxation rests on three federal figures. Knowing them turns a debate into arithmetic.
15.3%, split 12.4 and 2.9. Self-employment tax is 12.4% for Social Security and 2.9% for Medicare. A default LLC member pays both halves on net earnings from self-employment. An S corporation owner pays the same combined rate, but only on the salary, because a distribution is not compensation.
$184,500. That is the Social Security wage base for 2026. The 12.4% component stops there. Above it only the 2.9% Medicare rate continues, with no ceiling. This is the fact that decides the shape of the saving. Between the profit floor and the wage base, every dollar moved from salary to distribution saves the full 15.3%. Above the wage base, the same dollar saves only 2.9%. So the election that looked transformative at $150,000 of profit looks ordinary at $600,000, once the salary alone has consumed the Social Security band.
$201,750 and $403,500. Those are the 2026 taxable income thresholds at which the qualified business income deduction stops being a flat 20% of profit. Past those thresholds, it becomes subject to limits tied to W-2 wages and the type of business. The interaction matters because paying yourself a salary reduces the profit that qualifies for the deduction, while above the thresholds W-2 wages are part of what supports it. Below the thresholds, a bigger salary usually shrinks the deduction. Above them, it can preserve it.
One date completes the set. Form 2553 is due no more than two months and fifteen days after the start of the tax year the election is to take effect, or at any time during the preceding tax year. Miss it and relief is available under the standard late-election procedure within three years and seventy-five days of the intended effective date, provided the company can show reasonable cause and everyone has filed consistently with S treatment since. The full mechanics are in the Form 2553 guide. The entity-level alternative sits in Form 8832.
Penalties When the Election Goes Wrong
S taxation adds a return, a payroll obligation and a documentation burden. Each one carries its own price for being late or wrong, and the prices are specific.
The late 1120-S. For a 2026 tax year the penalty is $260 per shareholder per month, or part of a month, for up to twelve months. A two-owner S corporation five months late owes $2,600 with no tax due at all, because the return is informational. A husband-and-wife company forgets the March deadline entirely and files in September. It has spent more on the penalty than most payroll services cost for the year.
The very late personal return underneath it. If the owner's own return is more than sixty days late, the minimum addition to tax is the lesser of $535 or the whole amount of tax shown on the return.
The salary that cannot be defended. The IRS position is that distributions and other payments to a corporate officer must be treated as wages to the extent they are reasonable compensation for services, and it reserves the authority to reclassify non-wage distributions as wages. Reclassification is not a fine. It is back employment tax on the difference, plus interest and the usual failure-to-deposit exposure. On a $240,000 profit split as a $40,000 salary and $200,000 of distributions, moving the salary to a defensible $120,000 costs $12,240 in additional employment tax for a single year, before anything else is added.
The state that does not follow along. Federal S status is not automatically state S status. California charges S corporations 1.5% of net income with the same $800 annual minimum every entity there pays. A handful of states also tax the entity regardless of the federal election. Check the state before the arithmetic, not after.
Five Mistakes That Undo an S Election
The election itself is one page. Everything that goes wrong afterwards comes from one of these five.
Mistake 01: Electing before the profit supports it
The mistake: Filing Form 2553 on a first profitable year rather than on a settled level of profit.
Why it happens: The saving is easy to calculate. The overhead is not.
What it costs: Payroll service, a separate return and a bookkeeping upgrade run well over a thousand dollars a year. Below roughly $60,000 to $80,000 of consistent profit they exceed the tax saved.
Prevention: Run two full years at the default classification first, then model it in the savings calculator before filing anything.
Mistake 02: Setting the salary by internet formula
The mistake: Adopting a fixed split, most often 60% salary and 40% distributions, with nothing behind it.
Why it happens: A rule of thumb is quicker than a compensation study. It appears in every forum thread.
What it costs: The IRS looks at what the shareholder actually did and where the gross receipts came from. It does not look at a ratio. A number with no support behind it is the easiest adjustment an examiner can make.
Prevention: Document duties, hours, comparable pay and the source of revenue in the year you set the figure. Revisit it annually. The reasonable salary guide lists the factors used.
Mistake 03: Missing the two months and fifteen days
The mistake: Filing the election in April for a calendar year that began in January and assuming it is simply effective now.
Why it happens: Most tax deadlines are annual, so a window measured from the start of the year is easy to misread.
What it costs: The election lands a full year later than intended. Every distribution taken in the meantime is taxed under the old classification.
Prevention: Diary the date the moment the decision is made. If it has already passed, use the late-election relief route rather than waiting.
Mistake 04: Creating a second class of stock by accident
The mistake: Keeping an operating agreement that splits distributions differently from ownership after the election.
Why it happens: LLC agreements are written for flexibility. Disproportionate distributions are one of the things LLCs are good at.
What it costs: S corporations may have only one class of stock. Economic rights that differ between owners can terminate the election, retroactively, which is a far larger problem than the tax it was meant to save.
Prevention: Amend the operating agreement to align distributions strictly with ownership percentages before the election takes effect, not after.
Mistake 05: Treating revocation as reversible
The mistake: Electing to try it, with a plan to revoke if the numbers disappoint.
Why it happens: Most tax elections feel like settings rather than commitments.
What it costs: A revoked or terminated election generally cannot be remade for five years without consent. That means an experiment closes the door on the real decision later.
Prevention: Treat the election as a five-year commitment. Enter it only when two years of accounts say the numbers hold. When to actually switch works through the timing.
Three Elections, Three Outcomes
Same status, three profit levels, three different answers. The numbers below use the 2026 figures above.
Example 1: Vireo Copywriting LLC, where the election loses money
A one-member LLC in Boise with $58,000 of net profit. Default treatment costs 15.3% on net earnings from self-employment of about $53,563, which is roughly $8,195. A $35,000 salary with $23,000 of distributions would cut the employment tax to about $5,355, a gross saving near $2,840. Payroll service, the separate Form 1120-S and the extra bookkeeping run about $2,600.
Outcome: A net gain of roughly $240 in exchange for payroll deadlines, a second return and a reasonable-salary argument. The owner stays a default LLC and revisits in two years.
Example 2: Windrose Survey LLC, where the arithmetic works
A land survey practice with two years of profit at about $165,000. As a default LLC the self-employment tax base is roughly $152,377. The bill is about $23,314. With the election and a documented $85,000 salary, employment taxes on the salary come to $13,005. The remaining $80,000 leaves as distributions.
Outcome: After roughly $2,400 of payroll and filing overhead, the owner keeps about $7,900 a year. The salary is supported by comparable survey manager pay in the same market.
Example 3: Larkmead Plumbing LLC, reclassified on examination
A six-van plumbing business with $240,000 of profit paid its owner a $40,000 salary. It took $200,000 in distributions. Employment tax on that salary is $6,120. An examiner looked at who generated the gross receipts and compared the pay of the non-owner lead plumbers. The examiner settled on $120,000 as reasonable compensation, which carries $18,360.
Outcome: The election was sound and the salary was not. Two open years turned a real saving into a bill. That is why the compensation file matters more than the election itself.
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, and run the calculator. Then 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. It 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). The owner 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. That comes 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.
File your S-corp election
We prepare it, file it with the agency, and confirm it came back accepted. Or keep reading and file it yourself; this guide covers both.
This guide is written from the official sources below. Fees, forms, and deadlines change. Confirm the current requirement with the agency before you file.
Disclosure. File.Business is a private filing service, not a government agency and not a law firm. We prepare and submit filings at your direction, and nothing on this page is legal or tax advice. Filing fees, deadlines, and statutory references are current as of the last-updated date shown above and can change. Confirm current requirements with the relevant state agency before you file.
