"S-corp" is not a business entity. It is a tax election you layer on top of an entity you already own — almost always an LLC or a C-corp. You file one form (Form 2553), the IRS reclassifies how your profits are taxed, and from then on the business is treated as an S corporation for federal income tax. The entity itself (your LLC) does not change. Your liability protection, your operating agreement, your bank accounts — all stay the same.
The entire reason people do this is one thing: cutting the self-employment tax bill. Everything below is in service of understanding whether that cut is bigger than the cost of getting it.
As a default LLC owner (sole proprietor or partnership), 100% of your net profit is hit with self-employment tax of 15.3% — that's the 12.4% Social Security piece plus the 2.9% Medicare piece, and you pay both the "employer" and "employee" halves because you are both. (The 12.4% Social Security portion only applies up to the wage base, which is 184500 for 2026; Medicare's 2.9% has no cap.)
After an S-election, you split your profit into two buckets:
The savings is the 15.3% you no longer pay on the distribution bucket. If your business nets $120,000 and you pay yourself a defensible $70,000 salary, roughly $50,000 moves into the no-SE-tax bucket — a swing of about $7,650 in a single year. That recurs every year you're profitable.
The catch is in the word reasonable.
The IRS knows exactly why people make this election, and the entire game hinges on the salary being legitimate. The IRS instructs that an S-corp owner who works in the business must be paid reasonable compensation — roughly what you'd have to pay an unrelated person to do your job — before any distributions are taken (IRS, Wage Compensation for S Corporation Officers).
Set the salary too low to maximize distributions and you have a textbook audit adjustment: the IRS reclassifies distributions as wages, back-bills the payroll tax, and adds penalties and interest. There is no fixed percentage. A common myth is "60/40" (60% salary, 40% distribution) — it is a rule of thumb, not law, and it will not save you if your real market rate is higher. Document how you arrived at the number (industry comp data, hours, duties) and keep it on file.
The election only makes sense once SE-tax savings clear the added cost of being an S-corp: running payroll, a separate corporate tax return (Form 1120-S), more bookkeeping, and usually a higher CPA bill — call it 2000-$4,000/year.
A practical operator threshold: somewhere around 50000 in stable annual net profit. Below that, the savings are thin and the paperwork eats them. Above $80,000-$100,000 of consistent profit, the election is usually a clear win. The key word is consistent — a one-good-year spike is rarely worth locking yourself into payroll and a separate return.
It is not worth it if: your profit is lumpy or low, you reinvest nearly everything (little is left to distribute), you have non-eligible owners, or you're in a state that taxes S-corps directly (e.g., a separate state-level franchise or net-income tax) — which can erase the federal savings.
Per the IRS Instructions for Form 2553, the corporation must meet all of these to be an S-corp:
If you have a foreign co-owner or another company as a member, you are disqualified. Check this before you do anything else.
If you blew the 2-months-15-days window, you may still get the election back-dated under Rev. Proc. 2013-30. You file Form 2553 with "FILED PURSUANT TO REV. PROC. 2013-30" written across the top, show reasonable cause for the delay and that you acted diligently once you discovered it, and confirm everyone reported income consistently with S-status. The relief generally must be requested within 3 years and 75 days of the intended effective date. This is common and routinely granted — don't assume a missed deadline kills the whole strategy.
The S-election is one of the highest-ROI moves a profitable solo or small business owner can make — but only when three things are true at once: stable profit comfortably above the compliance cost, a defensible reasonable salary, and clean eligibility. Get those wrong and you either save nothing or invite an audit. Run the numbers with a CPA, file on time, and then actually run payroll.