A profitable LLC owner asks a CPA one question more than any other: should I elect S corp status? The honest answer is that it depends on your net profit, how much of that profit counts as your own labor, and whether you’re willing to take on payroll.
An LLC taxed as a sole proprietorship or partnership sends every dollar of profit through self-employment tax. An S corp election splits that profit into wages and distributions, and only the wage portion gets taxed the same way.
The difference can run into thousands of dollars a year, but it isn’t automatic, and the IRS has spent years pursuing businesses that pushed the split too far.
Key Takeaways
- An S corp election can cut self-employment tax by shifting part of your profit into distributions instead of wages.
- The IRS requires reasonable compensation for any shareholder-employee, and courts have repeatedly sided with the IRS when salaries looked too low.
- S corp status adds payroll, a separate tax return, and accounting costs, so the savings only show up once net profit clears a certain threshold.
An LLC and an S Corp Aren’t Actually Competing Options
This is where most of the confusion starts. An LLC is a legal entity created under state law, in Arizona that means filing Articles of Organization with the Arizona Corporation Commission. An S corp is not a legal entity at all. It’s a federal tax election made under Internal Revenue Code Section 1362 by filing Form 2553.
A single-member LLC, by default, is taxed as a sole proprietorship and reports income on Schedule C. A multi-member LLC defaults to partnership taxation. Either type of LLC can elect to be taxed as an S corp without changing anything about its legal structure, its name, or its liability protection.
The LLC still files Articles of Organization with the state and still operates under an operating agreement. The only thing that changes is how the IRS treats the income for tax purposes.
So the real comparison isn’t LLC versus S corp. It’s an LLC taxed as a sole proprietorship or partnership versus an LLC taxed as an S corp. Once that’s clear, the tax question gets a lot more concrete.
The Real Cost Driver: Self-Employment Tax
Every dollar of net profit from a sole proprietorship or a default-taxed LLC is subject to self-employment tax under IRC Section 1401. That rate is 15.3%, made up of 12.4% for Social Security and 2.9% for Medicare.
The Social Security portion only applies up to the annual wage base, which the Social Security Administration set at $184,500 for 2026.
Above that amount, only the 2.9% Medicare portion continues, and high earners pay an additional 0.9% Medicare surtax once income passes $200,000 for single filers or $250,000 for married couples filing jointly.
There’s a small adjustment built into the calculation. Self-employment tax is computed on 92.35% of net profit, not the full amount, which approximates how a W-2 employee’s wages exclude the employer’s share of FICA. Here’s what that looks like at a few income levels.
| Net Business Profit | Taxable SE Earnings (92.35%) | Self-Employment Tax (15.3%) |
|---|---|---|
| $60,000 | $55,410 | $8,478 |
| $100,000 | $92,350 | $14,130 |
| $150,000 | $138,525 | $21,194 |
None of this is reduced by Schedule A deductions or retirement contributions. It’s calculated on net profit before most of the usual planning levers apply, which is why S corp status gets pitched so aggressively to anyone clearing six figures.
How the S Corp Election Changes the Math
Once an LLC elects S corp status, the owner who works in the business becomes a W-2 employee of that business. The business pays a salary, withholds the employee share of FICA, and matches it with the employer share, exactly as it would for any other employee.
Whatever profit is left over after that salary gets distributed to the owner as a shareholder distribution, and distributions aren’t subject to self-employment tax or FICA at all.
Take a business netting $150,000 with an owner who sets a salary of $80,000. The wages get taxed at the combined 15.3% FICA rate, split between employer and employee halves, coming to $12,240. The remaining $70,000 flows out as a distribution with no FICA or SE tax attached.
Compare that to the $21,194 the same $150,000 would owe as straight self-employment tax, and the payroll-tax-only savings come to roughly $8,950 a year, before factoring in payroll and filing costs.
LLC vs. S Corp at Different Income Levels
The savings scale with income, but so does the salary an owner can defensibly claim. The table below uses a salary that increases with profit, since a $50,000 salary on $150,000 of profit would draw IRS scrutiny just as fast as a $24,000 salary would on $250,000.
| Net Profit | LLC: SE Tax | S Corp: FICA on Salary | Tax-Only Savings | Est. Extra Compliance Cost | Net Benefit |
|---|---|---|---|---|---|
| $60,000 | $8,478 | $7,650 (salary $50,000) | $828 | $2,500–$3,500 | Likely a net loss |
| $100,000 | $14,130 | $9,180 (salary $60,000) | $4,950 | $2,500–$3,500 | $1,500–$2,500 |
| $150,000 | $21,194 | $12,240 (salary $80,000) | $8,954 | $3,000–$4,000 | $5,000–$6,000 |
This is illustrative, not a formula. Reasonable compensation isn’t a fixed percentage of profit, and a business with $60,000 in profit might still owe the owner a $50,000 salary if that’s genuinely what the market pays for the work performed.
The break-even point most practitioners point to sits between $80,000 and $100,000 in net profit, though it shifts based on the owner’s role and how much of the income comes from capital versus labor.
The Reasonable Compensation Catch
The IRS doesn’t let S corp owners set their own salary at whatever number minimizes payroll tax. Under IRS Fact Sheet 2008-25, a shareholder-employee who performs more than minor services must be paid wages that reflect what an unrelated employee would be paid for the same work.
The agency lists training, duties, time devoted to the business, comparable industry pay, and dividend history among the factors courts use to evaluate that number.
David E. Watson found this out the hard way. Watson, a CPA with a master’s degree in taxation and roughly 20 years of experience, paid himself a $24,000 salary through his S Corp in both 2002 and 2003, while the corporation distributed $203,651 and $175,470 to him as dividends in those same years.
The IRS recharacterized a large portion of those distributions as wages, and the case went all the way to the Eighth Circuit Court of Appeals, which sided with the IRS in 2012.
The court didn’t pick an arbitrary number out of thin air. It looked at what other accountants with Watson’s experience were paid and concluded that $24,000 wasn’t close to defensible for someone doing that work.
Watson isn’t an isolated case. Joseph M. Grey, a CPA who took no salary at all for two years while drawing distributions, lost a similar argument before the Tax Court in 2002.
The pattern is the same in both cases: courts don’t object to S corp owners taking distributions, they object to distributions standing in for wages that should have been paid.
What the S Corp Election Actually Costs You
The tax savings on paper rarely tell the whole story. Electing S corp status adds real obligations that a default-taxed LLC doesn’t have:
- A payroll system has to run year-round, with regular paychecks, federal withholding, and quarterly Form 941 filings.
- The business files its own return, Form 1120-S, separate from the owner’s personal Form 1040, along with a Schedule K-1 for each shareholder.
- Arizona requires its own corporate return, Form 120S, in addition to the federal filing.
- Unemployment insurance, both federal Form 940 and Arizona’s state unemployment tax, applies to the wages paid to the owner.
- Bookkeeping generally needs to be more precise, since the IRS can ask for documentation supporting how the salary number was set.
Most small businesses end up paying somewhere between $2,500 and $4,000 a year in additional payroll and accounting fees once they elect S corp status, on top of whatever they already paid for tax preparation.
Running the actual numbers with someone who prepares both individual and corporate returns settles this faster than guessing, and that’s exactly what a business tax preparation review is built to do.
Where the QBI Deduction Fits In
The Qualified Business Income deduction under Section 199A complicates this comparison in a way that often gets left out of the conversation.
The One Big Beautiful Bill Act made the 20% QBI deduction permanent in 2025 and widened the phase-in ranges starting in 2026, with the deduction now fully available up to $201,750 of taxable income for single filers and $403,500 for joint filers, phasing out for service businesses by $276,750 and $553,500.
Wages paid to an S corp owner don’t count toward QBI, only the distribution portion does. Shifting more income into salary to satisfy reasonable compensation rules can shrink the QBI deduction while increasing payroll tax at the same time, which is one more reason the salary number needs care rather than padding or trimming.
When the LLC Still Wins
S corp status isn’t the better answer for every profitable business. A default-taxed LLC tends to stay the simpler, cheaper choice in a few common situations:
- Net profit sits under roughly $60,000 to $80,000 a year, where compliance costs are likely to outpace the payroll tax savings.
- The business holds rental real estate, since rental income generally isn’t subject to self-employment tax in the first place and gains nothing from the S corp structure.
- Multiple owners include passive investors who contribute capital but no labor, since S corp shareholder rules and the single-class-of-stock requirement can complicate ownership structures that partnership taxation handles more flexibly.
- The owner plans to bring in outside investors or issue different classes of membership interest, which an S corp’s one-class-of-stock rule doesn’t allow.
Arizona-Specific Considerations
Forming the underlying LLC in Arizona is inexpensive either way. Articles of Organization cost $50 through the Arizona Corporation Commission, with an optional $35 expedite fee, and Arizona doesn’t require LLCs to file an annual report or pay a franchise tax.
If the LLC’s known place of business sits outside Maricopa or Pima County, state law still requires publishing a Notice of Publication in an approved newspaper within 60 days of approval, which typically costs somewhere between $30 and $300 depending on the publication.
None of that changes once an S corp election is made, since the election is a federal filing layered on top of the existing LLC. What does change is the Arizona tax return: an S corp files Arizona Form 120S in addition to Form 1120-S, while a default-taxed LLC’s income simply flows through to the owner’s personal Arizona return.
Anyone setting up a new entity with the election in mind should plan the formation and the S corp filing together, since the two-month-and-15-day window to elect S corp status for the current tax year starts running from the date the entity gets its members, assets, or first does business, whichever comes first.
A business formation and setup consultation before filing Articles of Organization can line up the entity structure and the election timing so nothing gets missed.
Frequently Asked Questions
Does electing S corp status change my LLC’s liability protection?
No. The S corp election is a tax classification, not a legal structure change. The LLC still provides the same liability protection under Arizona law whether it’s taxed as a sole proprietorship, a partnership, or an S corp.
Can a single-member LLC elect S corp status?
Yes. A single-member LLC can file Form 2553 to be taxed as an S corp as long as it meets the underlying eligibility requirements, including having no more than 100 shareholders and only one class of stock. The owner becomes both the sole shareholder and a W-2 employee of the business.
What happens if I set my salary too low?
The IRS can recharacterize part of your distributions as wages, as it did in the Watson case, and assess back payroll taxes, penalties, and interest on the difference. There’s no safe harbor percentage that automatically protects a salary number from review.
Is there a minimum profit level where S corp status makes sense?
There’s no official threshold, but most practitioners look for net profit in the $80,000 to $100,000 range before the payroll tax savings reliably exceed the added cost of running payroll and filing a separate corporate return.
Do I need to file Form 2553 every year?
No. The election stays in effect until it’s revoked, the business stops qualifying, or the IRS terminates it for violating an eligibility rule. Once terminated or revoked, the business generally can’t re-elect S corp status for five years without IRS consent.
Conclusion
An S corp election can meaningfully cut self-employment tax once profit clears the point where the savings outweigh payroll and compliance costs, but the salary has to hold up under IRS scrutiny or those savings disappear in penalties.
Running the actual numbers for your business, rather than applying a rule of thumb, is the only way to know which side of that line you’re on.
