An LLC is not automatically an S corp or a C corp. A Limited Liability Company is a legal structure created under state law, while “S corp” and “C corp” are federal tax classifications the IRS assigns. Your LLC can elect to be taxed as either one, but it doesn’t have to. By default, the IRS treats a single-member LLC as a sole proprietorship and a multi-member LLC as a partnership. So the real question for most owners isn’t which one they already are; it’s which tax treatment costs them the least.
Legal Entity Versus Tax Classification
When you form an LLC, you file paperwork with your state’s Secretary of State. That filing creates a legal entity that shields your personal assets from business debts. The IRS pays little attention to the state-level label. It wants to know how to tax you, and it assigns its own classification.
S corp and C corp are those classifications. A C corporation can also exist as its own legal entity formed by filing articles of incorporation, but when applied to an LLC, “C corp” simply means you’ve chosen to be taxed under the rules that normally apply to corporations.1Internal Revenue Service. Forming a Corporation The same goes for S corp status; it’s a tax election layered on top of the LLC you already have.2Internal Revenue Service. S Corporations The liability protection and flexible management of the LLC remain no matter which tax status you pick.
That layering is where the confusion comes from. People hear “S corp” and assume it’s a type of business you form at the state level. It isn’t. You form an LLC (or a corporation) at the state level, then separately tell the IRS how you’d like to be taxed.
How the IRS Taxes Your LLC If You Do Nothing
File no election paperwork and the IRS applies default rules based on how many owners you have.
A single-member LLC is treated as a “disregarded entity.” The IRS essentially ignores the LLC and taxes all business income directly on your personal return, typically on Schedule C of Form 1040.3Internal Revenue Service. Single Member Limited Liability Companies The LLC itself doesn’t file a separate federal income tax return.
A multi-member LLC defaults to partnership treatment. The LLC files an informational return on Form 1065 but doesn’t pay income tax at the entity level. Each member receives a Schedule K-1 showing their share of profits and losses, and reports that income on their personal return.4Internal Revenue Service. LLC Filing as a Corporation or Partnership
Under either default, net business income flows through to the owners and is subject to self-employment tax at a combined rate of 15.3% (12.4% for Social Security plus 2.9% for Medicare).5Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) That 15.3% hit on every dollar of profit is exactly what drives many LLC owners to consider an S corp election.
Why LLC Owners Elect S Corp Taxation
An LLC taxed as an S corp still uses pass-through taxation. Profits aren’t taxed at the entity level. What changes is how those profits reach you. Instead of reporting all business income on your personal return as self-employment income, you split it into two buckets: salary and distributions.
As a shareholder-employee, you pay yourself a reasonable salary. That salary is subject to employment taxes (the same 15.3%, split between you and the business). Any remaining profit you take as a distribution is not subject to those employment taxes.6Internal Revenue Service. S Corporation Compensation and Medical Insurance Issues You still owe income tax on distributions, but you skip the 15.3%.
A rough example: if your LLC earns $150,000 in profit and you pay yourself a $90,000 salary, the remaining $60,000 taken as a distribution avoids roughly $9,180 in employment taxes. That’s real money, and it’s the main reason S corp elections are popular among profitable single-owner LLCs and small partnerships.
The catch is that the IRS requires the salary to be “reasonable,” meaning comparable to what someone in a similar role at a similar company would earn. You can’t pay yourself $20,000 and call the rest a distribution. The IRS looks at your training, duties, time commitment, and what similar businesses pay for the same work.6Internal Revenue Service. S Corporation Compensation and Medical Insurance Issues If the IRS decides your salary was unreasonably low, it can reclassify distributions as wages and assess back employment taxes, penalties, and interest.7Internal Revenue Service. S Corporation Employees, Shareholders and Corporate Officers
Why C Corp Status Is Rarely the Answer for Small LLCs
An LLC that elects C corp status becomes a separate taxpayer. The entity pays a flat 21% federal income tax on its profits.8Office of the Law Revision Counsel. 26 U.S.C. 11 – Tax Imposed When those after-tax profits are distributed as dividends, the owners pay tax again at individual rates, typically 0%, 15%, or 20% depending on their income level.1Internal Revenue Service. Forming a Corporation
This double taxation is the main reason most small LLC owners avoid C corp status. On $100,000 of profit, the entity pays $21,000 in corporate tax. If the remaining $79,000 is distributed as dividends to an owner in the 15% bracket, another $11,850 goes to tax, leaving $67,150 from the original $100,000.
C corp treatment can still make sense in specific situations. If the business plans to reinvest most of its profits rather than distribute them, the 21% flat rate may beat the owner’s personal rate. Businesses seeking venture capital or planning to go public often lean C corp because institutional investors prefer or require it. For a typical small LLC distributing profits to its owners, though, the double-tax bite usually outweighs any advantage.
Who Can Elect S Corp Status
Any LLC can elect C corp tax status without restriction. File the paperwork and you’re done. S corp status is more restrictive. The IRS imposes a specific set of requirements, and your LLC must meet them continuously, not just at the moment of election.9Office of the Law Revision Counsel. 26 U.S.C. 1361 – S Corporation Defined
- The LLC must be a domestic entity, formed in the United States.
- Only U.S. citizens, U.S. residents, certain estates, and certain qualifying trusts can be owners. Partnerships, corporations, and nonresident aliens cannot hold an ownership interest.
- You cannot have more than 100 shareholders or members.
- All members must have identical rights to distributions and liquidation proceeds. Differences in voting rights alone won’t disqualify you.
- Certain business types are excluded: financial institutions using the reserve method for bad debts, insurance companies, and certain international sales corporations.
Violate any of these rules, even temporarily, and the S corp election terminates automatically. Adding a corporate investor as a member or crossing the 100-owner threshold would end the election. The simplicity of S corp status carries a hidden cost: you have to watch ownership changes carefully.
How to File the Election
The form you file depends on which tax status you want.
Electing S Corp Status
File IRS Form 2553 directly. A common misconception is that you first have to file Form 8832 to be treated as a corporation and then separately elect S corp status. You don’t. Form 2553 handles both steps at once for an LLC.10Internal Revenue Service. About Form 2553, Election by a Small Business Corporation
The deadline is the 15th day of the third month of the tax year you want the election to take effect. For a calendar-year LLC, that means March 15. File by that date and S corp treatment applies for the full year. Miss the deadline and the election generally won’t kick in until the following tax year.
Every member must consent to the election by signing Form 2553 or a separate consent statement. If a member’s spouse has a community property interest in the ownership stake, the spouse must sign too.11Internal Revenue Service. Instructions for Form 2553
Electing C Corp Status
File IRS Form 8832, the Entity Classification Election.12Internal Revenue Service. About Form 8832, Entity Classification Election The timing rules are different from Form 2553. The effective date on Form 8832 can go back no more than 75 days before the filing date, and no more than 12 months into the future.13Internal Revenue Service. Form 8832 Entity Classification Election Instructions
What Changes After an S Corp Election
Electing S corp treatment creates real operational obligations that don’t exist under the default LLC tax setup. Ignoring them can lead to penalties that erase the tax savings you were chasing in the first place.
You must run payroll for any member who works in the business. That means withholding federal income tax, Social Security, and Medicare from their paycheck, paying the employer’s share of those taxes, and filing quarterly payroll returns. Most LLC owners don’t have payroll systems before this election, so plan on setting one up or hiring a payroll service.7Internal Revenue Service. S Corporation Employees, Shareholders and Corporate Officers
The LLC must file Form 1120-S each year by the 15th day of the third month after the end of its tax year.14Internal Revenue Service. Instructions for Form 1120-S
Keep records supporting why your salary is reasonable. If the IRS audits and decides your salary was too low, it can reclassify the underpayment and add penalties on the unpaid employment taxes. Comparable salary data, a written job description, and documentation of how you set your compensation give you a much stronger position.
Revoking an S Corp Election
If S corp treatment stops making sense, perhaps because business income dropped below the point where payroll tax savings justify the administrative cost, you can revoke the election by filing a statement with the IRS service center where you submit your annual return.15Internal Revenue Service. Revoking a Subchapter S Election
Unlike the original election, revocation doesn’t require unanimous consent. Shareholders owning more than 50% of the company’s stock must sign the revocation statement. To make revocation effective on the first day of the current tax year, file by the 15th day of the third month, March 15 for calendar-year entities. File after that date or specify a later effective date and the revocation takes effect on the date you choose, but the IRS must receive it by that date.
One consequence to keep in mind: once you revoke or lose S corp status, the LLC generally cannot re-elect S corp treatment for five tax years.16Office of the Law Revision Counsel. 26 U.S.C. 1362 – Election; Revocation; Termination The IRS can waive this waiting period if the termination was outside the corporation’s control and wasn’t part of a deliberate plan, but that waiver is discretionary, not automatic.
State Tax Rules May Not Match Your Federal Choice
Your federal tax election doesn’t always carry over to the state level cleanly. Most states accept the federal S corp election automatically, but some require a separate state-level filing to get pass-through treatment. A handful of states ignore the S corp election entirely and tax the entity as a regular corporation regardless.
Several states impose their own entity-level tax on S corporations even when they recognize the federal pass-through structure. California, New Hampshire, New Jersey, and Tennessee are among the states that charge some form of corporate-level tax on S corps. That doesn’t eliminate the federal benefits, but it can reduce the overall savings significantly in those states.
Your LLC also owes state-level maintenance fees regardless of federal tax classification. Most states require annual or biennial reports with filing fees, and some impose franchise or privilege taxes simply for doing business there. The costs range from nothing in some states to several hundred dollars in others, and apply whether your LLC is taxed as a partnership, S corp, or C corp.