An LLC with an S corp election is a limited liability company that has asked the IRS to tax it as an S corporation rather than under the default rules for LLCs. The company remains an LLC under state law, so its liability shield and flexible management stay in place. Only the federal tax treatment changes, and the point of the change is a specific tax mechanic: the ability to split an owner’s take from the business between a W-2 salary and profit distributions, with only the salary portion subject to Social Security and Medicare taxes.
Where the Tax Savings Come From
By default, the IRS treats a single-member LLC as a disregarded entity and a multi-member LLC as a partnership.1Internal Revenue Service. Limited Liability Company (LLC) In both setups, the full net profit is subject to self-employment tax at 15.3% — 12.4% for Social Security and 2.9% for Medicare.2Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)
After the S corp election, the LLC still pays no federal income tax itself. Profits and losses pass through to the owners’ personal returns. The difference is how money leaves the company. Any owner working in the business must be put on payroll and paid a reasonable salary, and that salary carries the same Social Security and Medicare tax as any other W-2 wage. Profit distributed to owners beyond the salary is not subject to those employment taxes. For a business earning well above what a reasonable salary would be, the split can save thousands each year.
Two ceilings shape the math. The Social Security portion applies only to wages up to $184,500 in 2026.3Social Security Administration. Contribution and Benefit Base The 2.9% Medicare tax has no cap, and a 0.9% Medicare surtax applies to high earners above certain thresholds.
Which LLCs Qualify
The eligibility rules under 26 U.S.C. § 1361 are strict, and missing any one of them disqualifies the entity:4Office of the Law Revision Counsel. 26 USC 1361 – S Corporation Defined
- The LLC must be formed in the United States.
- Every owner must be a U.S. citizen or resident alien, or a qualifying estate or trust. Partnerships, corporations, and nonresident aliens cannot hold any ownership stake.
- The LLC can have no more than 100 owners, though family members generally count as one shareholder for this cap.
- The company can have only one class of stock. Ownership units must carry identical rights to distributions and liquidation proceeds; differences in voting rights alone are fine.
- Certain financial institutions, insurance companies, and domestic international sales corporations are excluded.
The one-class-of-stock rule is the one most likely to catch an LLC by surprise. Operating agreements often build in preferred returns, tiered profit splits, or priority distributions that would fail this test. If yours does anything other than allocate profit strictly in proportion to ownership, have it reviewed before filing.
How to Make the Election
The election is made on IRS Form 2553, “Election by a Small Business Corporation.” An LLC does not need to file Form 8832 first; Form 2553 changes the classification and elects S status in a single filing.5Internal Revenue Service. Instructions for Form 2553
The form asks for the LLC’s legal name, address, EIN, state of formation, and organization date. Every member must be listed with their name, address, SSN or ITIN, and ownership percentage, and each must sign to consent. A single missing signature will cause the IRS to reject the filing.6Internal Revenue Service. Form 2553, Election by a Small Business Corporation
Timing is where most problems start. To have the election apply for the current tax year, Form 2553 must be filed no later than two months and 15 days after the tax year begins — March 15 for a calendar-year LLC. Filing anytime during the prior tax year also works.7Office of the Law Revision Counsel. 26 USC 1362 – Election; Revocation; Termination
Miss the deadline and the election generally slips to the next tax year. The IRS offers late-election relief under Revenue Procedure 2013-30 if the entity had reasonable cause and reported its income consistently as though the S election were already in effect.8Internal Revenue Service. Late Election Relief
Form 2553 goes by mail or fax to the IRS service center for the LLC’s state; it cannot be filed electronically. Processing takes roughly 60 days, and the IRS confirms acceptance with Notice CP261.9Internal Revenue Service. Understanding Your CP261 Notice Keep that notice permanently as proof of the election.
Reasonable Salary Is the Audit Trigger
The salary-versus-distribution split is the whole point of the election, and it is also where the IRS focuses enforcement. Every owner who works in the business must be paid what a comparable role at a similar company would pay. There is no statutory dollar amount or percentage, which leaves the IRS wide discretion to push back on salaries it considers too low.10IRS.gov. Wage Compensation for S Corporation Officers
Factors that courts and the IRS look at include the owner’s training and experience, actual duties, hours devoted to the business, what comparable businesses pay for the same role, and the ratio of distributions to salary. An LLC paying its owner $30,000 in salary and $200,000 in distributions is asking for scrutiny.
If the IRS decides a salary is unreasonably low, it can reclassify distributions as wages after the fact. The company then owes the unpaid employment taxes on the reclassified amounts, plus interest and possible penalties.11Internal Revenue Service. S Corporation Compensation and Medical Insurance Issues This is the most common audit issue for S corp LLCs and is largely preventable with a defensible salary backed by industry data.
What You Take On Each Year
Running the LLC as an S corp adds real administrative work compared with the default treatment.
The company files Form 1120-S, the S corporation income tax return, reporting gross receipts, deductions, and net income.12Internal Revenue Service. About Form 1120-S, U.S. Income Tax Return for an S Corporation For calendar-year filers the return is due March 15, and a six-month extension is available by filing Form 7004 before the original deadline.13Internal Revenue Service. Instructions for Form 7004 An extension to file is not an extension to pay.
The company must issue each owner a Schedule K-1 showing their share of income, deductions, and credits, on the same March 15 deadline (or the extended one).14Internal Revenue Service. 2025 Instructions for Form 1120-S
Because at least one owner is on payroll, the LLC has to run payroll, withhold federal income tax and FICA, file quarterly employment tax returns, and pay federal and state unemployment taxes. Between the payroll service or bookkeeper fees and the more complex tax return, the added annual cost has to be weighed against the projected self-employment tax savings before the election makes sense.
The Loss Deduction Trap
S corp status limits how much of a business loss you can actually deduct in a given year. Four separate limitations apply in a specific order:15Internal Revenue Service. S Corporation Stock and Debt Basis your stock and debt basis in the company; the at-risk rules; the passive activity rules if you don’t materially participate; and an individual-level cap on excess business losses.
The basis piece is the one that surprises people. In a partnership or a multi-member LLC taxed as a partnership, certain entity-level debt can increase a partner’s basis and support larger loss deductions. Under S corp rules, only direct loans from the shareholder to the company count. Third-party debt taken on by the LLC does not increase your basis. If the LLC carries significant debt and losses are likely, that single difference can make the S corp election the wrong move.
How the Election Interacts with the QBI Deduction
S corp owners can qualify for the Section 199A qualified business income deduction, which lets eligible pass-through owners deduct a share of their qualified business income on their personal returns. The deduction was originally 20% and set to expire after December 31, 2025.16Internal Revenue Service. Qualified Business Income Deduction The One, Big, Beautiful Bill Act, signed into law on July 4, 2025, made it permanent and raised it to 23% starting in 2026.17Internal Revenue Service. One, Big, Beautiful Bill Provisions
The salary the S corp pays is W-2 income, not qualified business income, so only the profit reported on Schedule K-1 counts toward the QBI calculation. Push the salary too high and the QBI deduction shrinks. Specified service businesses like law, medicine, and consulting also face income-based phase-outs that limit or eliminate the deduction above certain thresholds. All of this feeds back into where the reasonable salary line should sit.
State Tax Treatment Is Not Uniform
The S election is a federal choice, and states handle it inconsistently. Most follow the federal election automatically or accept a simple conforming state filing. Some impose an entity-level tax on S corporations, and a few ignore the election entirely for state income tax purposes. State-level franchise taxes and annual report fees apply regardless. California, for example, charges a minimum $800 annual franchise tax on LLCs regardless of income. Missing state filings can lead to administrative dissolution of the LLC, and no federal tax election protects against that.
Ending the Election
Once accepted, an S corp election continues indefinitely. It ends only by voluntary revocation or involuntary termination.
To revoke, owners holding more than half the shares must consent. A revocation filed on or before the 15th day of the third month of the tax year takes effect on the first day of that year; filed later, it takes effect the following year. A future effective date can also be specified.7Office of the Law Revision Counsel. 26 USC 1362 – Election; Revocation; Termination
The election terminates automatically the moment the LLC stops meeting an eligibility requirement — admitting a corporate member, crossing the 100-owner cap, or creating a second class of ownership rights. Termination is effective on the date of the disqualifying event, which can force two short-year returns for the same calendar year.
After a revocation or termination, the IRS generally requires a five-year wait before a new S corp election. The IRS can waive that wait if the disqualifying circumstances have been corrected and it consents to an earlier re-election.18Internal Revenue Service. Instructions for Form 2553 Treat the decision to elect as one you plan to live with; unwinding it is not a quick reset.