LLC vs S Corp: Which Business Structure Is Right for You?

LLC vs S Corp: compare pass-through taxes, self-employment tax, reasonable salary, and the Form 2553 election to decide which structure fits your business.

Wondering whether an LLC vs S Corp election is right for your business? The short answer: an LLC is a flexible state-level structure that's taxed by default as a pass-through entity, while an S corp is a tax election that can reduce your self-employment tax once profits grow. Here's how the two compare and when the switch makes sense.

How an LLC Is Taxed by Default

By default, the IRS treats a single-member LLC as a disregarded entity. You report business income and expenses on Schedule C attached to your personal tax return, and you pay income tax plus self-employment tax on your net profit. Multi-member LLCs file Form 1065 and receive a Schedule K-1, but the tax still passes through to owners. No corporate-level tax applies, which is why people say an LLC avoids double taxation.

What an S Corp Election Is

An S corporation is not a business structure you form at the state level. It's a tax status you elect with the IRS by filing Form 2553. The deadline is generally the 15th day of the third month of the tax year, so for a calendar-year LLC that's roughly March 15, about 75 days after the year starts. Miss the window and you can often qualify for late relief if you have reasonable cause. The election also requires consent from all shareholders, and the LLC must meet eligibility rules such as a limit of 100 shareholders and only one class of stock.

LLC vs S Corp: Tax Comparison

Factor	LLC (default)	LLC with S Corp Election
Self-employment tax	All net profit subject to 15.3%	Only reasonable salary subject to 15.3%
Payroll	Not required for owners	Required; owner must be paid a salary
Tax filings	Schedule C or Form 1065	Form 1120-S plus K-1s
Corporate tax	None, pass-through	None, pass-through
Election deadline	N/A	Form 2553, generally March 15

The table shows the core trade-off. With an S corp election, only your reasonable salary is hit with self-employment tax. The rest of your profit comes out as distributions, which avoid that 15.3% tax. The catch: you must run payroll, file Form 1120-S, and pay yourself a salary the IRS considers reasonable.

Who Benefits From the S Corp Election

Most tax professionals suggest the S corp election starts to pay off when net income sits above roughly $50,000 to $70,000 a year. Below that range, the savings from avoiding self-employment tax on distributions can be smaller than the added costs of payroll processing, extra filings, and accounting. Above it, the math often flips in your favor. That threshold isn't a hard rule, so ask a CPA to run the numbers for your specific situation, including state taxes and how much salary you'd need to pay. For a side business or a low-profit LLC, staying with the default is usually the smarter, cheaper choice.

Drawbacks and Requirements

• You must pay yourself a reasonable salary, and the IRS can reclassify distributions if the salary looks too low.
• Payroll taxes, unemployment insurance, and payroll processing add ongoing cost and admin work.
• You'll file an additional corporate return, Form 1120-S, each year.
• Shareholder limits apply: no more than 100 shareholders, and only certain trusts and entities qualify.
• You can only have one class of stock.

How to Make the Election

To elect S corp status, file Form 2553 with the IRS, signed by all shareholders, within the deadline. You'll need an EIN if you don't already have one. Many owners work with a CPA or use an LLC service that handles the filing. Once approved, the election stays in effect until you revoke it or the IRS terminates it. Some states also require a separate S corp election or have their own rules, so check with your state's tax agency.

Still deciding? Read our guide on how LLC taxes work, compare structures at S corp vs LLC, or check LLC tax topics.

Frequently Asked Questions

Is an LLC better than an S corp?

It depends on your income and goals. An LLC offers flexible pass-through taxation with no payroll requirements, while an S corp election can lower self-employment tax once profits are high enough. Most owners find the S corp election worthwhile when net income is above roughly $50,000 to $70,000 a year.

Can an LLC elect S corp status?

Yes. An LLC can elect to be taxed as an S corporation by filing Form 2553 with the IRS. The deadline is generally the 15th day of the third month of the tax year, and all shareholders must consent. The LLC must also meet eligibility rules, including a limit of 100 shareholders and one class of stock.

How much tax do you save with an S corp?

The main savings come from self-employment tax. With an S corp election, only your reasonable salary is subject to the 15.3% self-employment tax, while distributions are not. The savings must be weighed against payroll costs, extra filings, and accounting fees, which is why the election usually pays off only at higher income levels.

What is the difference between an LLC and an S corp?

An LLC is a state-level business structure with flexible management and pass-through taxation by default. An S corp is a tax election, not a structure you form. When an LLC elects S corp status, it keeps its LLC structure but is taxed like an S corporation, with a reasonable salary requirement and payroll obligations.

When should I switch my LLC to an S corp?

Most tax professionals suggest considering the switch when net income is above roughly $50,000 to $70,000 a year. Below that, the self-employment tax savings may not cover the added costs of payroll, Form 1120-S filings, and accounting. Talk to a CPA who can run the numbers for your situation.