S Corp vs C Corp for a One-Person Business

At FreelanceAtlas, we help freelancers compare business setups with real numbers. This guide explains how each type of corporation is taxed, works through a one-person example three ways, and covers the cases where a C corp can still fit, including the qualified small business stock rules. If you are comparing an S corp election with keeping a plain LLC, read S Corp vs LLC: Which One a Freelancer Needs, and for the salary rules behind any S corp, read S Corp for Freelancers: When the Tax Savings Are Real.

This article is general information, not tax or legal advice. The examples use 2026 federal figures for a single filer with simplified assumptions, and your state, salary, benefits and plans for the business change the answer. Confirm your numbers with a CPA or enrolled agent, and the choice of entity with a business attorney, before you file an election.

S Corp vs C Corp: The Same Corporation, Taxed Two Ways

An S corp and a C corp are both corporations under state law, or an LLC that has chosen to be taxed as one. The difference is federal tax. The IRS page on forming a corporation says “a C corporation is recognized as a separate taxpaying entity,” and then explains the cost of that: “The profit of a corporation is taxed to the corporation when earned, and then is taxed to the shareholders when distributed as dividends. This creates a double tax. The corporation does not get a tax deduction when it distributes dividends to shareholders.”

The IRS S corporations page describes the other route. Shareholders “report the flow-through of income and losses on their personal tax returns and are assessed tax at their individual income tax rates,” which “allows S corporations to avoid double taxation on the corporate income.” A C corp files Form 1120 and pays its own tax. An S corp files Form 1120-S and sends each owner a Schedule K-1, which Schedule K-1 Tax Form: What the K1 Means for S Corp and Partnership Owners explains.

Liability protection is the same in both. The US Small Business Administration’s guide to business structures lists “Owners are not personally liable” for both, and it notes that “corporate profits are taxed twice” in some cases for a C corp, while S corps “allow profits, and some losses, to be passed through directly to owners’ personal income without ever being subject to corporate tax rates.”

How to Check if Your Company Is a C Corp or an S Corp

A corporation is a C corp unless it elects otherwise. The S corporations page says that “In order to become an S corporation, the corporation must submit Form 2553.” Three checks settle it:

• Look for a CP261 notice. The IRS CP261 page says the notice means “We’ve accepted your S Corporation election,” and tells you to keep it “in your permanent records.”
• Check last year’s return. Form 1120 means C corp, Form 1120-S means S corp, and Schedule C on your own return means the business was never taxed as a corporation at all.
• Call if neither settles it. The Instructions for Form 2553 give 1-800-829-4933 as the number to call if a business has not heard about its election within 2 months of filing.

How Double Taxation Works on $100 of Profit

The C corp rate is flat. The Instructions for Form 1120 tell the company to “Multiply taxable income (page 1, line 30) by 21% (0.21).” What is left can be paid out as a dividend. IRS Topic 404 says qualified dividends “qualify to be taxed at lower capital gain rates,” and IRS Topic 409 sets those at 0, 15 or 20 percent. For 2026, Revenue Procedure 2025-32 sets the single filer’s 0 percent limit at $49,450 of taxable income and the 15 percent limit at $545,500. On top of that, IRS Topic 559 applies a 3.8 percent net investment income tax once modified adjusted gross income passes $200,000 for a single filer.

Follow $100 of C corp profit to your pocket:

• Corporate tax. $100 x 21 percent = $21, leaving $79.
• Dividend at 15 percent. $79 x 15 percent = $11.85. Total tax: $32.85.
• Dividend at 20 percent plus 3.8 percent. $79 x 23.8 percent = $18.80. Total tax: $39.80.

Now the same $100 as S corp profit above your salary. It carries no payroll tax and goes on your return as K-1 income. Below the 2026 threshold of $201,750 for single filers, the qualified business income (QBI) deduction usually removes 20 percent of it, so you pay income tax on $80. In the 22 percent bracket that is $17.60, and in the 24 percent bracket it is $19.20. The Instructions for Form 8995 allow the deduction on income “from a pass-through entity, but not from a C corporation.” That gap, $17.60 or $19.20 against $32.85, is the core of the S corp vs C corp answer for most freelancers.

Worked Example: $150,000 of Profit in a One-Person Corporation

The inputs:

• A single filer in 2026, sole owner and only employee, with no other income and the $16,100 standard deduction.
• $150,000 of profit before the owner’s pay, and an $80,000 salary in every column.
• Payroll tax rates from IRS Topic 751: 6.2 percent Social Security and 1.45 percent Medicare each for employer and employee.
• Payroll service and return preparation cost about the same for either corporation, so they are left out, as are state taxes. Amounts are rounded to whole dollars.

The S Corp Column

1. Payroll tax. $80,000 x 15.3 percent = $12,240, half paid by the company and half withheld from your pay.
2. K-1 income. $150,000 – $80,000 – $6,120 employer share = $63,880, taxed to you whether or not you take it out.
3. Taxable income. $80,000 + $63,880 = $143,880, minus $16,100 = $127,780. The QBI deduction is 20 percent of the K-1 income, $12,776, leaving $115,004.
4. Income tax. The 2026 single table charges $17,966 plus 24 percent of the amount over $105,700: $17,966 + $2,233 = $20,199.
5. Total. $12,240 + $20,199 = $32,439.

The C Corp Column, Profit Paid Out

1. Corporate tax. The same $63,880 is the company’s taxable income. 21 percent of it is $13,415, leaving $50,465, which the company pays you as a qualified dividend.
2. Your taxable income. $80,000 + $50,465 = $130,465, minus $16,100 = $114,365. There is no QBI deduction.
3. Tax on the salary part. Ordinary taxable income is $114,365 – $50,465 = $63,900. The tax is $5,800 + 22 percent of $13,500 = $8,770.
4. Tax on the dividend. Your ordinary income already passes the $49,450 zero rate limit, so the whole $50,465 is taxed at 15 percent: $7,570. Income is below $200,000, so the 3.8 percent tax does not apply.
5. Total. $12,240 + $13,415 + $8,770 + $7,570 = $41,995, which is $9,556 more than the S corp.

The C Corp Column, Profit Kept in the Company

If the company keeps the $50,465 instead of paying it out, you pay income tax only on your salary: $8,770. The year’s total is $12,240 + $13,415 + $8,770 = $34,425. That is still $1,986 more than the S corp, and the $50,465 is not yours yet. When the company pays it out later, the dividend tax follows, $7,570 at the same 15 percent rate.

Why Keeping Profit in a C Corp Rarely Helps a Freelancer

The argument for a C corp at this income is that 21 percent looks lower than a 22 or 24 percent personal bracket. The example shows why that comparison misleads at freelance income levels. Your S corp income tax was $20,199, against $8,770 on the salary alone, so the $63,880 of K-1 income added $11,429 of tax, an effective 17.9 percent. The C corp charged 21 percent on the same profit, before any dividend tax. The QBI deduction is the reason, and the C corp gives it up. The QBI Deduction for Freelancers: How the 20% Really Works in 2026 explains the deduction and its limits.

Keeping money in the company long term has its own limit. Section 531 of the tax code, published by Cornell’s Legal Information Institute, imposes “an accumulated earnings tax equal to 20 percent of the accumulated taxable income.” Section 532 applies it to a corporation “formed or availed of for the purpose of avoiding the income tax with respect to its shareholders” by keeping earnings instead of paying them out. Section 535 lets most corporations keep at least $250,000 of earnings, more if the business needs it, but a corporation whose main work is services “in the field of health, law, engineering, architecture, accounting, actuarial science, performing arts, or consulting” gets $150,000 instead.

Paying All the Profit Out as Salary Does Not Fix It

One way to avoid the corporate tax is to pay all profit out as wages. With $150,000 of profit, a salary of $139,340 plus the company’s $10,660 share of payroll tax uses up the profit, so the company owes no income tax. The cost moves to you:

• Payroll tax. Both halves come to $21,320.
• Income tax. $139,340 – $16,100 = $123,240 of taxable income, taxed at $17,966 + 24 percent of $17,540 = $22,176, with no QBI deduction.
• Total. $21,320 + $22,176 = $43,496.

That is more than the $37,607 a sole proprietor with the same $150,000 of profit would pay in 2026, as the table in How Much to Set Aside for Taxes on 1099 Income in 2026 shows, and $11,057 more than the S corp.

When a C Corp Can Make Sense for a Small Business

A C corp is not wrong for everyone. It can fit when:

• An owner cannot hold S corp stock. The S corporations page says shareholders “May not be partnerships, corporations or non-resident alien shareholders.” A freelancer who lives abroad and is not a US citizen or resident cannot own an S corp, so a US corporation owned by that person is a C corp.
• You plan to sell shares to investors. An S corp can have no more than 100 shareholders and only one class of stock. An S corp cannot issue a second class of shares, such as preferred stock for investors.
• Profit stays in the business at a high personal bracket. For a 2026 single filer, the 32 percent bracket starts at $201,775 of taxable income. Above the QBI phase-in range, which ends at $276,750, a consulting business or other specified service business loses the QBI deduction, so 21 percent on reinvested profit can be lower than your own rate.
• You are building a product company you may sell. Qualified small business stock, covered next, applies only to C corp shares.

A freelancer who meets none of these, such as a designer, writer or developer who pays out most profit each year, lives in the United States and has no investors, fits the S corp or no election at all.

QSBS: The Exclusion Most Freelance Businesses Cannot Use

Section 1202, the qualified small business stock (QSBS) rule, lets a shareholder exclude gain when selling stock in a qualifying C corp. The One Big Beautiful Bill Act changed it for stock acquired after July 4, 2025. The current text of 26 U.S.C. 1202 sets these terms for that stock:

• C corp only. QSBS means “any stock in a C corporation” that meets the tests, and the company must stay a C corporation “during substantially all of the taxpayer’s holding period.”
• Holding period. The exclusion is 50 percent after 3 years, 75 percent after 4 years and 100 percent after 5 years or more.
• Cap. Gain counted per company is capped at the greater of $15,000,000 or 10 times your basis in the shares sold.
• Size. The company’s gross assets cannot exceed $75,000,000 before or immediately after the stock is issued.

The catch for freelancers is the list of excluded businesses. The statute leaves out “any trade or business involving the performance of services in the fields of health, law, engineering, architecture, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage services, or any trade or business where the principal asset of such trade or business is the reputation or skill of 1 or more of its employees.” A one-person service business that sells its owner’s skill is the kind of business that list describes. QSBS becomes relevant if you are turning freelance work into a product company, such as software you sell by subscription, and expect to sell shares worth millions after 3 to 5 years. That is a question for a tax attorney before you form the company, because the statute counts only stock “acquired by the taxpayer at its original issue.”

Health Insurance and Other Benefits

A C corp owner who works in the business is an ordinary employee for fringe benefits. IRS Publication 15-B says an employer “can generally exclude the value of accident or health benefits you provide to an employee from the employee’s wages,” and its benefits table marks those benefits exempt from income tax withholding “except 2% shareholder-employees of S corporations.”

An S corp owner with more than 2 percent of the stock is treated differently. Publication 15-B says you “must include the value of accident or health benefits you provide to the employee in the employee’s wages subject to federal income tax withholding,” though not in wages for Social Security and Medicare. The IRS page on S corporation compensation and medical insurance then gives the owner “an above-the-line deduction in arriving at Adjusted Gross Income (AGI)” when the coverage was established by the S corp and other conditions are met. For a solo owner, that deduction often brings the two setups close on premiums. Self-Employed Health Insurance Deduction in 2026: Form 7206 and HSAs covers how the deduction works. Health benefits alone rarely justify a C corp’s double tax.

Losses, Returns and Deadlines in Each Setup

A first year with a loss plays out differently. The IRS forming a corporation page says “Shareholders cannot deduct any loss of the corporation,” so a C corp’s loss stays inside the company to offset its own later profit. An S corp passes losses through to your return, subject to basis and other limits.

The filing calendars also differ for a calendar-year business:

• C corp. The Form 1120 instructions say a corporation “must file its income tax return by the 15th day of the 4th month after the end of its tax year,” so April 15, 2027 for 2026. The company also pays its own estimated tax in installments “due by the 15th day of the 4th, 6th, 9th, and 12th months of the tax year.”
• S corp. Form 1120-S is due by the 15th day of the third month, so March 15, 2027 for 2026, and you pay estimated tax on your K-1 income through Form 1040-ES, as the S corporations page lists.
• Both. Payroll for your salary, with Forms 941 and 940, appears on the filing lists for both corporation types.

A one-person consulting corporation also needs to check the personal service corporation rules. The Form 1120 instructions define one as a corporation whose principal activity is “the performance of personal services” in fields including “accounting, actuarial science, architecture, consulting, engineering, health, law, and the performing arts,” substantially performed by employee-owners, and say such a corporation “must use a calendar tax year” unless an exception applies.

Switching From C Corp to S Corp, or Back

A C corp becomes an S corp by filing Form 2553. The Form 2553 instructions allow filing “No more than 2 months and 15 days after the beginning of the tax year the election is to take effect” or at any time in the year before, so a calendar-year election for 2027 can be filed through March 15, 2027. The IRS says it “should generally receive a determination on its election within 60 days.”

Two rules make a switch harder to undo:

• Built-in gains. The S corporations page says S corps “are responsible for tax on certain built-in gains and passive income at the entity level,” which can apply to assets that gained value while the company was a C corp.
• A waiting period after leaving. The Form 2553 instructions say an election “stays in effect until it is terminated or revoked,” and IRS consent is generally required to elect again “for any tax year before the 5th tax year after the first tax year in which the termination or revocation took effect.”

An LLC has the same choices. The IRS LLC page says an LLC uses Form 8832 to be classified as a corporation, and that such an election generally “cannot take effect more than 75 days prior to the date the election is filed, nor can it take effect later than 12 months after the date the election is filed.” An LLC that wants S status skips Form 8832 and files Form 2553 directly.

Which One a Solo Freelancer Should Pick

For one person selling their own services in the United States, the order is usually:

1. Neither, while profit is close to a reasonable salary. A sole proprietorship or default LLC avoids payroll and a second return. How to Pay Yourself as a Freelancer or LLC Owner: Draws vs Salary covers paying yourself without payroll.
2. An S corp, once profit sits well above a salary you can defend. Run the numbers with your own salary, costs and state before you file Form 2553.
3. A C corp, only for a listed reason. A nonresident owner, outside investors, profit reinvested at a high bracket, or a product company aiming for QSBS treatment.

Whichever you choose, the tax and payroll costs belong in your pricing. Our rate calculator turns an income goal and your costs into an hourly rate.

Conclusion

An S corp and a C corp can be the same company under state law, with the same liability protection. The difference is that a C corp pays 21 percent on its profit and you pay again on dividends, while S corp profit above your salary is taxed once, with the QBI deduction. In our $150,000 example with an $80,000 salary, that meant $41,995 of federal tax as a C corp paying out its profit and $32,439 as an S corp, and even keeping the profit inside the C corp cost $1,986 more.

A C corp fits a few cases: an owner who cannot hold S corp stock, plans for investors, profit reinvested at a high personal bracket, or a product company that may qualify for QSBS. For a freelancer selling their own services, compare no election with an S corp first. If the S corp wins, a calendar-year election for 2027 is due by March 15, 2027.

Key Takeaways

• A C corp pays a flat 21 percent federal tax on its profit, and qualified dividends are taxed again at 0, 15 or 20 percent, with the 2026 single filer’s 15 percent rate starting above $49,450 of taxable income.
• Each $100 of C corp profit paid out as a dividend at 15 percent loses $32.85 to federal tax, against $17.60 to $19.20 for S corp profit above salary in the 22 and 24 percent brackets.
• With $150,000 of profit and an $80,000 salary in 2026, total federal tax was $32,439 as an S corp, $41,995 as a C corp paying out its profit and $34,425 as a C corp keeping it.
• Paying all $150,000 out as C corp salary cost $43,496, more than the $37,607 a sole proprietor would pay on the same profit.
• QSBS applies only to C corp stock, excludes consulting and businesses whose main asset is the reputation or skill of its employees, and for stock acquired after July 4, 2025 excludes 50 to 100 percent of gain after 3 to 5 years.
• A C corp’s return is due April 15, 2027 for calendar 2026, and an S corp election for 2027 is due by March 15, 2027.

Frequently Asked Questions

Is it better to be an S corp or a C corp?

For a one-person freelance business, usually an S corp, because its profit is taxed once and keeps the QBI deduction, while a C corp pays 21 percent and then you pay tax on dividends. In our 2026 example with $150,000 of profit and an $80,000 salary, the S corp paid $32,439 in federal tax and the C corp paid $41,995 once its profit was paid out. A C corp can fit when an owner cannot hold S corp stock, you plan to bring in investors, or you are building a product company that may qualify for QSBS.

How much tax does an S corp that earns $200,000 pay?

An S corp generally pays no federal income tax itself, because the profit is taxed on the owner’s return. For a single filer in 2026 with $200,000 of profit, a $100,000 salary and no payroll or return preparation costs deducted, our estimate is $15,300 of payroll tax and $30,465 of income tax, $45,765 in total. The same business as a C corp paying out its profit would owe $58,807, including $19,394 of corporate tax.

How do I know if I am a C corp or an S corp?

A corporation is a C corp unless it filed Form 2553 and the IRS accepted it. Acceptance comes as a CP261 notice, which the IRS says to keep in your permanent records. You can also check last year’s return: Form 1120 means C corp and Form 1120-S means S corp. If neither answers it, the Form 2553 instructions list 1-800-829-4933 for following up on an election.

Which is better for a freelancer, an LLC or a C corp?

For most freelancers, an LLC. Both protect personal assets, but a default LLC is taxed once on your return, keeps the 20 percent QBI deduction and needs no payroll, and it can still elect S corp status later with Form 2553. A C corp pays 21 percent on profit and you pay again on dividends, so it suits outside investors, an owner who cannot hold S corp stock, or a product company aiming for QSBS treatment.

Can an LLC choose to be taxed as a C corp?

Yes. An LLC files Form 8832 to be classified as a corporation, and the IRS says the election generally cannot take effect more than 75 days before it is filed or more than 12 months after. The LLC then files Form 1120 and pays the 21 percent corporate rate. An LLC that wants S corp treatment instead skips Form 8832 and files Form 2553.