October 22, 2026
“Should I be an LLC or an S corp?” is one of the most common questions business owners bring to a CPA. The honest answer is that it’s often not an either-or choice. Plenty of businesses are both: an LLC under state law that’s taxed as an S corp by the IRS.
Here’s how the two fit together, what each one costs you in taxes, and the profit level where an S corp starts to pay for itself.
The one-sentence difference
An LLC is a legal structure you set up with the state. An S corp is a tax status you elect with the IRS.
The LLC decides how your business is owned and how your personal assets are protected. The S corp election decides how the business’s profit gets taxed. You can have one without the other, or both at the same time.
How a default LLC is taxed
If you form a single-member LLC and do nothing else, the IRS treats it as a “disregarded entity.” The profit shows up on Schedule C of your personal return, just like a sole proprietorship. An LLC with two or more owners is taxed as a partnership by default.
Either way, all of the profit is subject to self-employment tax: 15.3% on 92.35% of your net earnings, covering Social Security and Medicare. For 2026, the Social Security part applies up to $184,500 of earnings. The 2.9% Medicare part has no cap.
That self-employment tax is the cost most owners are trying to reduce when they ask about S corps.
What stays the same either way
Electing S corp status doesn’t change your LLC under state law. You keep the same company name, the same EIN, the same bank account and the same operating agreement. In Oklahoma you still file the LLC’s annual certificate with the Secretary of State. Your liability protection comes from the LLC and from keeping business and personal money separate, and the tax election doesn’t add to it or take away from it.
That’s why “LLC or S corp” is really two separate questions. The first is how to set up the company legally. The second is how you want the IRS to tax the profit.
How an LLC taxed as an S corp works
When your LLC elects S corp status by filing Form 2553, the profit is split into two buckets:
- A salary you pay yourself through payroll. This is subject to Social Security and Medicare tax, the same 15.3% total, split between you and the business.
- Distributions of the remaining profit. These are not subject to self-employment or payroll tax.
You still pay income tax on all of it. The savings come only from payroll tax on the part you take as distributions.
The catch is that the IRS requires your salary to be reasonable for the work you do. You can’t pay yourself $10,000 and take $140,000 as distributions. Our S corp payroll page covers how that salary gets set.
Side by side
| Default LLC | LLC taxed as an S corp | |
|---|---|---|
| Set up with | Your state | Your state, plus Form 2553 with the IRS |
| Federal return | Schedule C (single owner) or Form 1065 | Form 1120-S, plus a K-1 to each owner |
| Payroll tax | Self-employment tax on all profit | Payroll tax on your salary only |
| Owner salary required | No | Yes, a reasonable one |
| Payroll setup | Not needed | Required, with quarterly filings and W-2s |
| Ownership rules | Any number and type of owners | Up to 100 shareholders, US citizens or residents, one class of stock |
| Yearly cost to run | Lower | Higher (payroll service, separate business return) |
The numbers at $60,000, $100,000 and $150,000 of profit
These examples compare self-employment tax on a default LLC with payroll tax on an S corp salary. The salary figures are illustrations, not recommendations. Your reasonable salary depends on your work and your industry.
| Business profit | Self-employment tax as a default LLC | Example S corp salary | Payroll tax on that salary | Payroll tax saved |
|---|---|---|---|---|
| $60,000 | $8,478 | $35,000 | $5,355 | $3,123 |
| $100,000 | $14,130 | $55,000 | $8,415 | $5,715 |
| $150,000 | $21,194 | $75,000 | $11,475 | $9,719 |
These figures leave out income tax, the deduction for half of self-employment tax, the qualified business income deduction and state taxes. They show the payroll tax difference only, which is where the S corp advantage comes from.
What an S corp costs to run
The savings above are before the extra costs that come with S corp status:
- Running payroll for yourself, with quarterly payroll tax returns and a year-end W-2
- A separate business tax return, Form 1120-S, due March 15 for calendar-year companies
- More careful bookkeeping, because salary, distributions and expenses have to stay separate
- State filings and possibly state unemployment tax on your salary
At $60,000 of profit, those costs can take a big bite out of a $3,000 saving. At $150,000, the math usually works clearly in the S corp’s favor. Many owners fall somewhere in the middle, which is why the answer depends on your actual numbers.
When staying a default LLC makes sense
- Your profit is modest or unpredictable from year to year
- You’re in your first year and don’t know what the business will earn yet
- You don’t want to run payroll or keep the stricter records an S corp needs
- You have owners who can’t be S corp shareholders, such as another company or a nonresident alien
When an S corp election makes sense
- Your business is consistently profitable, well beyond what a reasonable salary would be
- You’re willing to run payroll and keep business and personal money separate
- You expect the profit to hold up for the next few years, since switching back and forth has limits
Mistakes we see after an S corp election
The election only saves money if it’s run correctly. These are the problems we see most often with owners who elected on their own:
- Never running payroll. Taking all the money as distributions with no salary is the pattern the IRS looks for first.
- Paying personal bills from the business account. It muddies your books and weakens the liability protection your LLC gives you.
- Uneven distributions between owners. In an S corp, distributions have to follow ownership percentages. An owner with 50% can’t take 70% of the cash.
- Missing the March 15 deadline for Form 1120-S. The late-filing penalty is charged per shareholder, per month, so a two-owner company that’s three months late pays six times the monthly amount.
- Forgetting state payroll accounts. Paying yourself a salary means registering with the Oklahoma Tax Commission for withholding and with the Oklahoma Employment Security Commission for unemployment tax.
Questions to answer before you decide
Before you file Form 2553, it helps to have rough answers to these:
- What did the business earn last year, and what do you expect this year?
- What would you have to pay someone else to do your job?
- Are you ready to run payroll every month or quarter?
- Do you have co-owners, and are they all eligible to be S corp shareholders?
- Do you plan to bring in investors or sell the business in the next few years?
If your answers point toward steady profit and a simple ownership group, an S corp is usually worth a closer look.
How to switch an LLC to an S corp
You don’t need to form a new company. Your existing LLC files Form 2553 with the IRS. For the election to apply to a full calendar year, it’s generally due by March 15 of that year. For 2027, that means March 15, 2027. Late elections can sometimes be accepted with reasonable cause, but it’s easier to file on time.
Oklahoma follows the federal election, and S corps file an Oklahoma return on Form 512-S. Our LLC to S corp conversion page walks through the steps.
FAQ
Is an S corp better than an LLC?
Neither is better in every case. An LLC is about legal structure and an S corp is about tax. For a profitable business, an LLC taxed as an S corp often gives you both the liability protection and the payroll tax savings.
Can a single-member LLC be an S corp?
Yes. A single-member LLC can elect S corp status by filing Form 2553, as long as the owner is an eligible shareholder.
Does an S corp protect my personal assets?
The S corp election itself is only a tax status. The liability protection comes from the legal entity, your LLC or corporation, and from keeping business and personal finances separate.
At what income should I switch to an S corp?
There’s no single number. It depends on your profit, a reasonable salary for your role, and the cost of running payroll and a separate return. Running your own numbers with a CPA is the only reliable way to know.
Not sure which is right for you?
Epsilon Accounting Solutions helps business owners in Edmond, Oklahoma City and beyond work out whether an S corp election saves them money, then handles the election, payroll and Form 1120-S. Call (405) 458-8949 or book a time on our contact page.