Picture a freelance designer — call her Dana, a composite rather than anyone real — closing out her books on a January evening. Her business netted $60,000 last year. Three different sources have told her she should “go S corp”: a podcast, a friend who does bookkeeping, and an online formation service that would happily file it for a fee. Not one of them asked what she would pay herself.
That is the whole question. An S corp makes sense when the self-employment tax you save on the profit you don’t take as salary is larger than the payroll tax and running costs the election adds. For a typical solo business, with a defensible salary and ordinary admin costs, that payroll-tax crossover sits somewhere between roughly $50,000 and $100,000 of profit. Where yours falls depends almost entirely on two numbers you control: the salary you can defend, and what the election costs you to run.
This post works out the S corp break-even with 2026 tax rates, at five profit levels, so you can see where the line actually sits. If you would rather run your own numbers as you read, the Business-Entity Decision Helper has a Tax & Cost Estimator that does this exact comparison from your profit and salary. The method below works with a calculator either way.
What an S corp election actually is
An S corp is a tax election, not a kind of business. You form an LLC or a corporation under state law, then ask the IRS to tax it under Subchapter S by filing Form 2553. An LLC can make that election directly: the IRS instructions for Form 2553 (opens in new tab) say an eligible entity that files it under the stated conditions doesn’t need to file Form 8832, Entity Classification Election, separately.
So “LLC vs S corp” is a slightly wrong question. The real comparison is:
- Default: your business taxed as a sole proprietorship or single-member LLC.
- Elected: the same business taxed as an S corp.
The liability shield is the LLC’s job. The tax savings, if there are any, are the election’s.
Why an S corp can save self-employment tax
As a sole proprietor or single-member LLC, you pay self-employment tax on nearly all your profit. The self-employment tax rate is 15.3% (opens in new tab) — 12.4% for Social Security and 2.9% for Medicare — and the amount it applies to is generally 92.35% of your net earnings (opens in new tab). Multiply the two and you pay about 14.13% of every profit dollar in self-employment tax, up to the Social Security wage base, which the Social Security Administration set at $184,500 for 2026 (opens in new tab).
An S corp splits your profit into two streams:
- Salary. You become an employee of your own company and pay the full 15.3% on it — half withheld from your pay, half paid by the company.
- Distributions. Profit left after salary comes out as a distribution, which carries no Social Security or Medicare tax.
The saving is the 14.13% you stop paying on the distribution part. The catch is the word “salary.” The IRS says an S corp must pay reasonable compensation to a shareholder-employee before non-wage distributions may be made (opens in new tab), and it judges “reasonable” on factors including your training and experience, your duties, the time you devote to the business, and what comparable businesses pay for similar services. You cannot pay yourself $10,000 and call the other $90,000 a distribution.
The S corp break-even at five profit levels
Back to Dana. Here is how her choice plays out with illustrative numbers, built on two deliberately ordinary assumptions:
- Salary: $45,000. A figure she could defend as what it would cost to hire someone to do her design work. Yours depends on your field and your hours.
- Extra cost of running the S corp: $2,500 a year. A payroll service, a separate business return (Form 1120-S) that costs more to prepare, state fees, and unemployment insurance on her own wages. Your real figure could be half that or double it.
| Net profit | Sole prop self-employment tax | S corp payroll tax + costs | S corp saves |
|---|---|---|---|
| $40,000 | $5,652 | about $8,200 (all of it is salary) | about −$2,500 |
| $60,000 | $8,478 | $9,385 | −$907 |
| $80,000 | $11,304 | $9,385 | $1,919 |
| $100,000 | $14,130 | $9,385 | $4,745 |
| $150,000 | $21,194 | $9,385 | $11,809 |
Three things stand out.
- At $60,000 the S corp costs Dana money. The $6,885 of payroll tax on her salary plus $2,500 of costs is more than the $8,478 she pays now. The advice she got was wrong for her this year.
- The line is crossed in the mid-$60,000s (about $66,400, worked out below). Below it, every version of the election loses; above it, the saving starts to build.
- Above the line, the saving grows by about 14 cents per extra profit dollar — as long as the salary does not have to grow too. A $150,000 business run entirely on Dana’s own labor makes a $45,000 salary much harder to defend, which is why the last row is the least reliable one in the table.
The S corp break-even formula
S corp break-even profit = (15.3% × your salary + yearly S corp costs) ÷ 14.13%
Below that profit, stay taxed as a sole proprietor or single-member LLC. Above it, the election starts paying for itself in payroll tax — before the income-tax and state adjustments in What the break-even formula leaves out, below.
For Dana: (15.3% × $45,000 + $2,500) ÷ 14.13% = ($6,885 + $2,500) ÷ 0.1413 ≈ $66,400.
The formula holds for profit below the Social Security wage base, which covers most solo businesses weighing this choice.
How your salary moves the S corp break-even
Your salary is the biggest lever in the formula, and it is not entirely yours to set.
| Salary you can defend | Payroll tax on that salary | Break-even profit |
|---|---|---|
| $30,000 | $4,590 | about $50,200 |
| $45,000 | $6,885 | about $66,400 |
| $60,000 | $9,180 | about $82,700 |
| $75,000 | $11,475 | about $98,900 |
Every extra $15,000 of salary pushes the break-even up by about $16,000 of profit. Running costs move it the same way: each $1,000 of yearly S corp cost shifts the break-even by about $7,100. Cut Dana’s costs to $1,500 and her break-even drops to about $59,300.
This is why the round numbers you hear quoted — $40,000, $50,000, $80,000 — disagree with each other. Each one quietly assumes a salary and a cost figure, and doesn’t say which.
What the break-even formula leaves out
The formula compares payroll tax only. Three other things move the real answer, and two of them move it against the S corp.
- The QBI deduction can shrink. Many pass-through owners can deduct up to 20% of their qualified business income (opens in new tab), but the same IRS page excludes amounts received as reasonable compensation from an S corporation from QBI. As a sole proprietor, nearly all of Dana’s profit feeds that deduction; as an S corp, her $45,000 salary does not. At a 12% marginal income-tax rate, losing 20% of $45,000 in deductions costs up to about $1,080 a year; at 22%, up to about $1,980. That alone can push her break-even up by as much as roughly $7,600 to $14,000.
- State taxes can add a line. California, for example, taxes every S corporation with California-source income at 1.5% and charges an $800 minimum franchise tax (opens in new tab). Other states have their own rules, and some add nothing.
- Payroll is a standing obligation. Running payroll means withholding, quarterly payroll filings and year-end W-2s, plus federal unemployment tax on your own wages — 6.0% on the first $7,000, or 0.6% after the full state credit (opens in new tab). If you have weighed employee vs contractor for a small business before, this is the employee side of that ledger, with you as the employee.
One part roughly washes: the company’s half of your payroll tax is a business expense, much as half of self-employment tax is deductible (opens in new tab) for a sole proprietor, so the income-tax effect of that half is close to even either way.
How to find your own S corp break-even
You can do this in four steps with last year’s numbers and a calculator.
- Write down your net profit. Write down last year’s net profit, before any salary to yourself, and a realistic estimate for next year. If they differ a lot, plan on the lower one.
- Pick a salary you could defend. Pick the salary it would cost to hire someone to do your work for the hours you actually put in. That is the number the reasonable-compensation rule cares about.
- Price the election’s running costs. Price the payroll service, the extra cost of preparing Form 1120-S, any state fees and unemployment tax on your own wages. Ask your tax preparer for a quote instead of guessing.
- Run the formula, then add the QBI cost. Divide 15.3% of your salary plus your yearly costs by 14.13% to get your break-even profit. Then work out the QBI cost, at most 20% of your salary times your marginal income-tax rate, divide it by 14.13% and add the result to your break-even. If your profit clears that higher figure, the election is worth a conversation with a CPA.
Dana’s answer at $60,000 is not yet. At $80,000 it would be a close call once QBI is counted. At $100,000 it is worth the CPA meeting. If you are still deciding when to quit your job for your side hustle, this decision usually comes a year or two after that one, once the profit is real.
The Business-Entity Decision Helper runs this comparison for you — profit and salary in, estimated payroll tax and costs per structure out — and sets it beside a weighted scorecard for the things the tax math can’t price, like liability protection and how much admin you will tolerate. It is a workbook you keep, so you can re-run it each January as the profit changes. Want to try the method first? The free Business-Entity Web Scorer compares two structures in your browser. And if you don’t yet know your profit to the dollar, start with the Freelancer Business Manager, which tracks per-client profit, invoices and your effective hourly rate through the year.
Common questions about S corp elections
Is an LLC the same as an S corp?
No. An LLC is a legal structure formed under state law; an S corp is a federal tax election. A single-member LLC is taxed like a sole proprietorship by default, and it can elect S corp taxation by filing Form 2553 without changing its legal form.
Can I pay myself a very low salary to save more tax?
No. The IRS requires an S corp to pay reasonable compensation to a shareholder-employee before non-wage distributions, judged on factors such as your duties, your time and what comparable businesses pay for similar services. A salary set only to minimize tax is exactly what that rule exists to stop.
What profit do I need before an S corp makes sense?
There is no single number. With a $45,000 salary and $2,500 of yearly costs, the payroll-tax break-even is about $66,400 of profit; with a $30,000 salary it is about $50,200, and with $60,000 it is about $82,700. Losing part of the QBI deduction pushes each of those higher.
When do I have to file the S corp election?
Form 2553 is due no more than 2 months and 15 days after the start of the tax year the election should cover, or at any time during the year before. The IRS has a late-election relief procedure, but filing on time is far simpler.
Sources
- IRS: Self-employment tax (Social Security and Medicare taxes) (opens in new tab)
- IRS Topic No. 554: Self-employment tax (opens in new tab)
- Social Security Administration: Contribution and benefit base (opens in new tab)
- IRS: S corporation compensation and medical insurance issues (opens in new tab)
- IRS: Instructions for Form 2553 (opens in new tab)
- IRS: Qualified business income deduction (opens in new tab)
- California Franchise Tax Board: S corporations (opens in new tab)
- IRS Topic No. 759: Form 940, Employer’s Annual Federal Unemployment (FUTA) Tax Return (opens in new tab)
