The short version: an S-Corp can save a profitable self-employed business owner anywhere from a few thousand to well over ten thousand dollars a year — but only in self-employment tax, only above a certain income, and only after you subtract the cost of actually running one. This is the plain-English breakdown of where the savings come from, a worked example you can follow, and how to know whether the numbers work for you. Want to skip to your own figure? Try our free S-Corp savings calculator. (This is general education, not tax advice — confirm your specifics with a CPA.)
Where the savings actually come from
Here's the single most important thing to understand: an S-Corp doesn't save you income tax. It saves you self-employment tax.
As a sole proprietor or a single-member LLC taxed the default way, every dollar of your net profit is subject to roughly 15.3% self-employment tax — 12.4% for Social Security (up to an annual wage base) and 2.9% for Medicare (no cap) — on top of your regular income tax. That self-employment tax is the price of not having an employer splitting the payroll-tax bill with you.
When you elect S-Corp status, you become an employee of your own company. You pay yourself a reasonable salary, which is subject to that same ~15.3% in payroll tax. But the profit left over after your salary is taken as a distribution — and distributions are not subject to self-employment or payroll tax. Your income tax comes out about the same either way, so the entire advantage is the payroll tax you avoid on the distribution portion.
The math, with a worked example
Let's run real numbers. Say your business nets $120,000 in profit, and a reasonable salary for your role is $60,000.
As a sole proprietor: ~15.3% self-employment tax on 92.35% of $120,000 ≈ $16,955.
As an S-Corp: ~15.3% payroll tax on the $60,000 salary = $9,180. The other $60,000 comes out as a distribution with no SE/payroll tax.
FICA tax avoided: $16,955 − $9,180 = $7,775.
Minus ~$2,000 to run the S-Corp (payroll + a separate return) = ≈ $5,775 net savings for the year.
Notice two things. First, the savings scale with the size of the distribution — the gap between your profit and your salary. Second, income tax never entered the calculation, because it's roughly the same whether that $60,000 is called salary or distribution. Plug your own profit and salary into the S-Corp savings calculator to see your number.
When an S-Corp is worth it (the break-even)
There's no hard cutoff, but the election generally starts to pay off once your profit is comfortably higher than a reasonable salary for your work — often somewhere north of $40,000–$80,000 in profit and up. The logic is simple: the savings come from the distribution, so if your reasonable salary eats up most of your profit, there's not much distribution left to save on.
Below that range, the FICA savings on a small distribution frequently get swallowed by the costs of running an S-Corp. Above it, the savings widen the more your profit exceeds your salary. If you're deciding between structures in the first place, our S-Corp vs LLC breakdown covers the full comparison.
The costs you have to subtract
An S-Corp isn't free. It adds real, ongoing costs that a sole proprietorship or default LLC doesn't have:
- Payroll. You have to run formal payroll for yourself, with a payroll service handling paychecks and payroll-tax filings.
- A separate tax return. An S-Corp files its own return (Form 1120-S), which usually means a higher tax-prep bill than a Schedule C.
- State fees. Some states charge franchise taxes or annual fees on S-Corps.
- Bookkeeping discipline. The election only works if the books are clean, payroll ties out, and the return is filed on time — sloppy records are where would-be savings quietly leak away.
Those costs commonly run a couple thousand dollars a year, which is exactly why the election only makes sense once the FICA savings clearly exceed them.
The reasonable-salary catch
The biggest lever in the whole calculation is your salary — and it's also where the IRS pays attention. S-Corp owner-employees are required to pay themselves a reasonable salary, roughly what you'd pay someone else to do your job, before taking distributions. Setting it artificially low to shrink the payroll-taxed portion is one of the most common S-Corp audit triggers.
So the goal isn't the lowest possible salary — it's a defensible one that reflects your role, hours, experience, and industry pay. Our guide to setting a reasonable S-Corp salary walks through how to land on a number you can support, and the calculator lets you test different salary levels to see the effect on your savings.
See your own S-Corp savings in 30 seconds
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