By default, the IRS treats a single-member LLC as a disregarded entity, meaning all business profit is taxed to you personally on Schedule C. You can change that single-member LLC tax classification by electing to be taxed as a C-corporation or an S-corporation, and each option trades a different mix of self-employment tax, paperwork, and flexibility. Most owners stay with the default; the ones who benefit from electing tend to have consistent profit well above what they’d pay themselves as a salary.
The Default: Disregarded Entity
Unless you file an election saying otherwise, a domestic single-member LLC is classified as a disregarded entity under the check-the-box regulations in Treasury Regulation § 301.7701-3.1eCFR. 26 CFR 301.7701-3 – Classification of Certain Business Entities “Disregarded” is literal: for federal income tax purposes, the IRS acts as if the LLC doesn’t exist. The entity still exists under state law and still shields your personal assets from business debts. It just doesn’t file its own income tax return.
You report the business’s income and expenses on Schedule C of your Form 1040, the same schedule sole proprietors use.2Internal Revenue Service. Instructions for Schedule C (Form 1040) Net profit flows onto your 1040 and is taxed at your individual income tax rate. There is no separate corporate return, no payroll to run for yourself, and no second layer of tax. For a straightforward business with moderate income, this is the simplest path and the one most single-member LLCs never leave.
The Cost of the Default: Self-Employment Tax
The catch is self-employment tax. Because no employer is withholding payroll taxes for you, you owe both halves of Social Security and Medicare on your net earnings, calculated on Schedule SE.3Internal Revenue Service. About Schedule SE (Form 1040), Self-Employment Tax The combined rate is 15.3% on net earnings above $400 for the year, and it applies on top of income tax.4Internal Revenue Service. Instructions for Schedule SE (Form 1040) You can deduct the employer-equivalent half when figuring your adjusted gross income, which softens it a little. Self-employment tax is the single biggest reason owners look at the other two classifications.
You’ll also need to send estimated payments to the IRS four times a year, because nobody is withholding on your behalf. Underpay and you can face an underpayment penalty under 26 USC 6654.5Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax Setting aside 25–30% of each payment you receive is a reasonable starting point in year one, before you have actual numbers to work from.
Electing S-Corporation Status
S-corporation status is the election that draws the most interest from LLC owners trying to cut self-employment tax. The LLC remains a pass-through, so profits and losses still land on your personal return. What changes is how you take money out.
As the sole owner-employee, you split your compensation into two streams: a salary subject to payroll taxes, and distributions of the remaining profit that are not subject to self-employment tax. If the LLC earns $150,000 in profit and you pay yourself a $70,000 salary, payroll taxes apply only to the $70,000. The other $80,000 passes through as a distribution free of Social Security and Medicare tax. That gap is where the savings live.
Who Qualifies
The LLC must be a domestic entity, and you must be a U.S. citizen or resident alien. The business can have only one class of stock and cannot have more than 100 shareholders. Partnerships, other corporations, and nonresident aliens are not permitted as shareholders.6Office of the Law Revision Counsel. 26 USC 1361 – S Corporation Defined
Reasonable Salary and the Audit Risk
The IRS watches owner salaries at small S-corporations closely. Setting your salary artificially low to avoid payroll taxes is one of the most common audit triggers. There is no bright-line rule for what counts as reasonable. The IRS looks at your training and experience, the time you devote to the business, what comparable businesses pay for similar work, and the company’s dividend history.7Internal Revenue Service. Wage Compensation for S Corporation Officers If the IRS finds your salary too low, it can reclassify distributions as wages and assess back payroll taxes plus penalties.
Most tax professionals suggest that a reasonable salary is at least what you’d have to pay someone else to do your job. Many advisors say the election starts making financial sense when net profit consistently clears $50,000 to $60,000 after paying yourself that reasonable salary. Below that, the added payroll and filing costs can eat the savings.
What Changes on the Compliance Side
An S-corp files Form 1120-S annually and runs payroll, which means quarterly payroll tax returns on Form 941 and W-2s at year-end. You’ll need an EIN (if you don’t already have one) and either a payroll service or the time and knowledge to run one yourself. Build those costs into your break-even math before filing.
Electing C-Corporation Status
You can also elect to have your single-member LLC taxed as a C-corporation by filing Form 8832. Business profits are then subject to the flat 21% federal corporate income tax.8Internal Revenue Service. About Form 8832, Entity Classification Election Any profit you distribute to yourself as dividends is taxed again on your personal return. That is the “double taxation” that makes C-corp status a poor fit for most small-business owners who pull cash out regularly.
C-corp treatment tends to make sense in narrower situations: you’re reinvesting most profits back into the business and prefer the 21% corporate rate to a higher individual rate, you’re preparing to raise venture capital from investors who expect a corporate structure, or you need to offer equity compensation through stock options. If you plan to withdraw most profits as personal income, double taxation almost always costs more than either of the pass-through alternatives.
The Qualified Business Income Deduction
Whether your LLC stays a disregarded entity or elects S-corporation status, you may qualify for the Section 199A qualified business income deduction, which was made permanent in 2025 with updated thresholds beginning in 2026. Eligible owners can deduct up to 20% of qualified business income, which effectively lowers the rate you pay on pass-through profit.
The full deduction is available without restriction below certain income thresholds. Above those thresholds, the deduction phases out based on the type of business, wages paid, and business property. Owners of “specified service” businesses such as law, medicine, consulting, and financial services face steeper phase-outs and can lose the deduction entirely at higher income levels. The deduction does not apply to C-corporation income, which is another reason to weigh classification carefully. Check current-year IRS guidance for the exact threshold amounts, as they adjust annually for inflation.
How to File the Election
Changing your classification requires the right form filed inside a specific window.
Form 8832 for C-Corporation Status
Form 8832, Entity Classification Election, is how you tell the IRS to treat your LLC as a corporation rather than a disregarded entity.9Internal Revenue Service. Form 8832, Entity Classification Election You’ll provide the LLC’s legal name, your EIN, your business address, and an effective date. The effective date cannot be more than 75 days before the filing date or more than 12 months after it. Pick a date outside that window and the IRS will adjust it to the nearest boundary. Filing by certified mail with a return receipt is worth the small cost to prove the date if a dispute ever comes up.
Form 2553 for S-Corporation Status
Electing S-corporation status requires Form 2553. The deadline is no more than two months and 15 days after the beginning of the tax year the election is to take effect, or any time during the preceding tax year.10Internal Revenue Service. Instructions for Form 2553 For a calendar-year LLC, that means filing by March 15 to have S-corp status for that year. Miss the date and the election won’t take effect until the following year unless you qualify for late relief.
If your LLC hasn’t already elected corporate treatment via Form 8832, filing Form 2553 handles both steps at once. The IRS treats the entity classification change and the S-election as a single filing.11Internal Revenue Service. About Form 2553, Election by a Small Business Corporation
Late Election Relief
Missing the deadline isn’t necessarily fatal. For a late S-corporation election, the IRS generally requires that the entity intended to be an S-corp from the start, that the failure was solely because the form wasn’t filed on time, that you have reasonable cause for the delay, and that you’ve been filing tax returns consistent with S-corp status since the intended effective date. You must also file within three years and 75 days of that intended effective date.12Internal Revenue Service. Late Election Relief
For a late Form 8832 election, the form has a Part II where you can request relief under Revenue Procedure 2009-41 or Revenue Procedure 2010-32. You’ll provide a written explanation of the delay and sign a declaration under penalties of perjury that the requirements for relief are met.9Internal Revenue Service. Form 8832, Entity Classification Election If you don’t qualify for the standard relief procedures, a private letter ruling is possible, but it’s slow and expensive.
The 60-Month Lock-In
Once you elect to change your LLC’s classification, you generally cannot change it again for 60 months. Elect C-corp status in January 2026 and you’re locked in until at least January 2031. The IRS can grant an exception through a private letter ruling if more than 50% of the ownership interests have changed hands since the prior election, but for a single-member LLC that keeps the same owner, the 60-month bar is effectively absolute.1eCFR. 26 CFR 301.7701-3 – Classification of Certain Business Entities
One useful exception: if a newly formed LLC makes an election effective on the date of formation, that initial choice doesn’t count as a “change” and doesn’t trigger the lock-in. A new business can elect S-corp on day one and still have flexibility to change later if things evolve.
Disregarded Doesn’t Mean Invisible for Employment Tax
A disregarded single-member LLC with no employees and no excise tax obligations can technically use the owner’s Social Security number for federal income tax purposes. Most owners get an EIN anyway because banks require one to open a business account and many states require a federal EIN for state tax registration.13Internal Revenue Service. Single Member Limited Liability Companies
The moment your LLC hires anyone, the rules change. A disregarded single-member LLC must use its own name and EIN, not the owner’s personal information, for reporting and paying employment taxes. The same is true for excise taxes on Forms 720, 730, 2290, and related filings: the LLC files under its own EIN.13Internal Revenue Service. Single Member Limited Liability Companies This catches some owners off guard because “disregarded” sounds like the LLC is invisible for everything. It isn’t. The IRS ignores the LLC for income tax while treating it as a separate entity for employment and excise taxes.