An S corp (or S corporation) is a special tax status granted by the IRS that lets a business pass its corporate income, losses, deductions, and credits directly to its shareholders. By doing so, the business avoids paying federal corporate income taxes, and the owners report the business’s financial results on their personal tax returns.

Meaning of “S corp”

In plain English, an S corp is not actually a type of business entity you form at the state level (like an LLC or a standard corporation). Instead, it is a specific tax election you choose to make with the IRS.

When a business is taxed as a traditional C corporation, it faces “double taxation”: the corporation pays tax on its profits, and then the owners pay tax again when they receive dividends. When you elect S corp status under Subchapter S of the tax code, the IRS agrees to ignore the business entity for federal income tax purposes. The profits simply “pass through” to the owners, who pay taxes at their individual tax rates, entirely eliminating the double tax.

Why an “S corp” Matters

Taxpayers care about the S corp election mainly for one massive financial benefit: lowering self-employment taxes.

If you run a profitable sole proprietorship or a standard LLC, you must pay both income tax and self-employment tax (Social Security and Medicare) on all your net business profit. However, as an S corp, you can split your business profit into two categories: a reasonable W-2 salary for yourself and a shareholder distribution. You only pay self-employment taxes on your salary, while the distribution is generally free from those specific payroll taxes, potentially saving you thousands of dollars.

How an “S corp” Works

In a real-world scenario, you first set up a legal entity in your state, usually an LLC or a standard C corporation. Then, you file a specific form with the IRS to request S corp tax treatment.

To qualify, the IRS requires your business to be domestic, have 100 or fewer allowable shareholders (who must be U.S. citizens or residents), and have only one class of stock. Once approved, the business must put its active owners on the payroll and pay them a “reasonable salary” based on industry standards. At tax time, the S corp files an informational return showing its total profits or losses, and then generates a Schedule K-1 for each owner. The owners use their K-1s to report their share of the profits on their personal tax returns.

Simple Example of an “S corp”

Imagine you run a successful freelance consulting LLC that makes $100,000 in net profit. Under normal LLC rules, you pay a 15.3% self-employment tax on the entire $100,000 (roughly $15,300), plus your standard income tax.

If you elect S corp status, things change. You decide that a “reasonable salary” for the work you do is $60,000. You put yourself on the company payroll and pay the 15.3% tax only on that $60,000 salary (roughly $9,180). The remaining $40,000 of profit is taken as a shareholder distribution. You still pay standard income tax on the full $100,000, but because you didn’t pay self-employment tax on the $40,000 distribution, you save over $6,000 in payroll taxes that year.

Who Is Affected by an “S corp”?

Small Business Owners & Freelancers: Highly profitable sole proprietors and LLC owners often make this election to reduce their overall tax burden.
Shareholders/Investors: Must be U.S. citizens or resident aliens; foreign investors and certain trusts or corporations cannot own shares in an S corp.
Employees: Because active S corp owners must act as employees, they must run formal payroll and withhold standard payroll taxes.

Common Mistakes Related to an “S corp”

Not paying a reasonable salary: Trying to pay yourself zero salary and taking 100% of the profits as distributions to dodge all self-employment taxes. The IRS actively audits and penalizes this.
Missing the filing deadline: Failing to submit the S corp election form within the first two and a half months of the tax year. (Though late relief is sometimes available if requested).
Commingling finances: Mixing personal and business bank accounts, which can jeopardize the legal liability protections of the corporation.
Violating ownership rules: Accidentally bringing on an ineligible partner, such as another corporation or a foreign resident, which immediately terminates the S corp status.

Forms Related to an “S corp”

Form 2553 (Election by a Small Business Corporation): The form you file with the IRS to officially request S corp tax status.
Form 1120-S (U.S. Income Tax Return for an S Corporation): The annual business tax return an S corp must file to report its income, deductions, and losses.
Schedule K-1 (Form 1120-S): Issued to each shareholder at the end of the year, showing their specific portion of the business’s profits or losses to report on their personal Form 1040.
Form W-2: Issued to active owners for the “reasonable salary” they were paid via payroll.

“S corp” vs. Related Terms

S corp vs. C corp: A C corp pays its own corporate-level taxes, leading to double taxation if profits are distributed. An S corp pays no corporate tax, passing all tax liability directly to the shareholders’ personal returns.
S corp vs. LLC: An LLC is a legal business structure formed at the state level that protects your personal assets. An S corp is purely a tax designation. You can actually be an LLC legally but choose to be taxed as an S corp by the IRS.

Related Glossary Terms

FAQs About an “S corp”

Is an S corp a legal business structure?
No, not strictly. While people often say they “formed an S corp,” they actually formed an LLC or a standard corporation at the state level, and then filed a tax election with the IRS to be treated as an S corp for tax purposes.

Do S corps pay any taxes at all?
Generally, no federal income tax is paid at the corporate level. However, some individual states do impose franchise taxes, minimum business taxes, or specific corporate taxes on S corps.

How do I know what a “reasonable salary” is?
The IRS requires you to pay yourself what another business would pay someone to do your exact job. You should look at industry averages, geographic location, and your specific daily duties to determine a fair W-2 wage.

Can I lose my S corp status?
Yes. If you violate any of the IRS rules—such as taking on more than 100 shareholders, issuing a second class of stock, or having a non-U.S. resident buy into the company—the IRS can immediately revoke your S corp status, forcing you to be taxed as a standard C corp.

Final Takeaway

An S corp is a powerful tax election that allows small business owners to avoid the double taxation of a traditional corporation while significantly lowering their self-employment tax bills. However, it comes with strict IRS rules, mandatory payroll requirements, and added administrative costs. While it can save profitable businesses thousands of dollars, it is essential to weigh the tax savings against the added paperwork and compliance responsibilities.

Disclaimer: This article is for general educational purposes only and should not be considered tax, legal, or financial advice. Tax rules, limits, deadlines, and thresholds can change, and you should verify them for the current tax year. Your situation may be different. Consider consulting a qualified tax professional before making tax decisions.

What Is an “S corp”?