LLC vs S-corp: when the tax election pays off

Last updated: 2026-05-27

An LLC is a state law concept. S-corp is a federal tax election. You can be both. By default, a single-member LLC is taxed as a sole proprietorship (Schedule C); a multi-member LLC is taxed as a partnership (Form 1065). Either can elect S-corp tax status by filing Form 2553.

The distinction almost everyone gets wrong

The phrase "LLC vs S-corp" is misleading, because it frames the two as competing entity types. They are not the same kind of thing. An LLC is a legal entity created under state law when articles of organization are filed with a Secretary of State. An S-corp is a tax election made with the federal government by filing IRS Form 2553. One lives at the state level and governs liability and ownership; the other lives at the federal level and governs only how the business is taxed.

Because they operate on different layers, they are not mutually exclusive. An LLC can keep its default tax treatment, or it can ask the IRS to tax it as an S-corp instead. The business stays an LLC the whole time — the same operating agreement, the same registered agent, the same liability shield, the same name on the state filing. Only the tax return changes. The real question is therefore not "should the business be an LLC or an S-corp?" but rather "should this LLC elect to be taxed as an S-corp?" Framing it that way removes most of the confusion, because it makes clear that nothing about the underlying company is being torn down and rebuilt.

This matters for planning. An owner does not have to decide at formation. A new LLC can run for a year under default taxation, watch how profit actually lands, and elect S-corp treatment later once the numbers justify the added work. For more on the underlying mechanics of how an LLC is taxed at the federal level, see the guide on how an LLC is taxed.

How default LLC taxation works

By default, an LLC is a pass-through entity. The business itself pays no federal income tax. Instead, all net profit "passes through" to the owner's personal return — Schedule C for a single member, or a Schedule K-1 from Form 1065 for a multi-member LLC. The owner then pays ordinary income tax on that profit at their personal marginal rate.

The catch is the second layer of tax. Because the owner is treated as self-employed rather than as an employee, every dollar of net profit is also subject to self-employment tax of 15.3%. That 15.3% is the combination of Social Security tax (12.4%, up to the annual wage base) and Medicare tax (2.9%, with no cap). It is the self-employed equivalent of the payroll taxes that a regular employer and employee split between them — except a self-employed owner pays both halves. On top of an income-tax bill, that self-employment tax is the cost that the S-corp election is designed to reduce.

How the S-corp election changes the math

Electing S-corp treatment splits the owner's income into two buckets. First, the owner becomes an employee of their own company and must be paid a reasonable salary through payroll. That salary is subject to FICA payroll taxes — the same 15.3% in substance, split into the employer and employee shares the company remits. Second, whatever profit remains after that salary can be taken as a distribution, and distributions are not subject to the 15.3% self-employment or payroll tax.

That gap is the entire point. Under default taxation, all profit is exposed to the 15.3% layer. Under an S-corp election, only the salary portion is exposed; the distribution portion escapes it. The larger the distribution relative to the salary, the larger the savings — which is exactly why the IRS cares so much about the salary being genuinely reasonable rather than artificially small.

A worked example: $120,000 of net profit

The following numbers are illustrative and rounded to show direction, not a precise tax calculation. They ignore the income-tax layer (which is broadly similar either way) and focus only on the self-employment / payroll tax difference, where the savings live. They are not tax advice.

Default LLC. All $120,000 of net profit is subject to self-employment tax. Roughly: $120,000 × 15.3% ≈ $18,360 in self-employment tax. (In practice a small downward adjustment applies, but the order of magnitude holds.)

LLC with S-corp election. The owner sets a reasonable salary of about $70,000 and takes the remaining $50,000 as a distribution. Payroll taxes apply only to the salary: $70,000 × 15.3% ≈ $10,710. The $50,000 distribution carries no self-employment or payroll tax.

The gap. $18,360 minus $10,710 is roughly $7,650 in payroll-tax savings for the year — before subtracting the added cost of running payroll and filing an S-corp return. That is the figure that has to clear the added overhead for the election to be worthwhile. Note that the savings scale with the distribution: a higher reasonable salary shrinks them, and a lower (but still defensible) salary widens them.

The "reasonable salary" requirement

The savings only exist because the distribution avoids the 15.3% layer, so an owner has an obvious incentive to set the salary as low as possible. The IRS knows this and polices it. S-corp owners are required to pay themselves a reasonable salary — meaning what an unrelated person would be paid to do the same job, with the same skills and responsibilities, in the same market — before taking distributions.

Set the salary too low relative to distributions and the IRS can reclassify some or all of those distributions as wages, then assess the unpaid payroll tax plus penalties and interest. There is no fixed statutory percentage. CPAs typically benchmark against Bureau of Labor Statistics wage data, industry surveys, and comparable job postings, and a common owner-operator heuristic lands somewhere around 30% to 60% of net profit depending on how labor-intensive the role is. The documentation supporting the chosen figure is what defends it in an audit, so it is worth getting from a professional rather than guessing.

The added costs nobody mentions

The S-corp election is not free money. It introduces real, recurring administrative cost that a default LLC does not carry:

• Payroll service. The owner must actually be on payroll, with withholding, quarterly deposits, and year-end W-2s. A payroll provider typically runs $600–$1,200 per year.
• More complex tax prep. An S-corp files its own return on Form 1120-S and issues a K-1 to the owner. Preparation usually costs $500–$1,500+ more than a Schedule C, because the return is more involved.
• Separate payroll filings. Federal Form 941 each quarter, Form 940 annually, plus state payroll and unemployment filings — ongoing paperwork that must not be missed.
• State-level costs. Some states impose their own franchise tax, S-corp tax, or minimum fee on S-corps (California's $800 minimum and 1.5% S-corp tax are the most-cited example).

Added together, these typically run somewhere from about $1,000 to $3,000+ per year. That number is the hurdle the payroll-tax savings have to clear.

Default LLC vs S-corp election at a glance

The break-even rule of thumb

Putting the savings and the costs side by side gives a usable rule of thumb. The election starts to pay off once net profit is comfortably above roughly $60,000–$80,000. The logic is simple: the payroll-tax savings only exist on the distribution portion above a reasonable salary, and those savings have to be larger than the $1,000–$3,000+ of added admin cost before the election leaves the owner ahead. Below that profit zone, there is little or no distribution left after a reasonable salary, so there is nothing to save — and the admin cost is pure loss.

Above the threshold, the savings curve steepens: the more profit sits above a reasonable salary, the more of it converts to tax-advantaged distribution. An owner with $200,000 of net profit and a $100,000 reasonable salary commonly saves well into five figures per year, net of overhead. The threshold is a guide, not a bright line — the right number depends on the reasonable salary for the specific role and the state's own costs, which is why running the actual figures with a CPA matters.

When the S-corp election does not make sense

For many LLCs, default taxation is the better answer. The election usually does not pay off when:

• Profit is low. Under roughly $60,000 of net profit there is rarely enough distribution above a reasonable salary to beat the added admin cost.
• The business is reinvesting everything. If profit is being plowed back into growth rather than taken out, there are no large distributions to shelter, so the savings never materialize.
• Simplicity matters more than marginal savings. A single-owner LLC operating in one state may value not running payroll, not filing an 1120-S, and not documenting reasonable compensation more than a few thousand dollars of tax savings.
• The owner is a non-US resident. S-corps may only have eligible US-person shareholders, so non-resident owners generally cannot elect S-corp status at all.
• Outside investment is planned. S-corps cannot have institutional or non-individual shareholders and are capped at 100 shareholders, so a business heading toward venture funding should not elect it.

A note on the C-corp

The C-corp is a different animal and is not the focus here. A C-corp is taxed as its own entity: the corporation pays corporate income tax on its profit, and shareholders pay tax again on dividends — the familiar "double taxation." That structure can make sense for companies retaining earnings, offering broad equity, or raising venture capital, but for the typical owner-operated LLC weighing self-employment tax, the relevant comparison is default pass-through taxation versus the S-corp election, not the C-corp. Anyone genuinely weighing a C-corp should model it with a CPA, because the tradeoffs are entirely different.

For the broader cost picture of running an LLC — including formation, annual reports, and registered-agent fees that apply regardless of tax election — see how much an LLC costs, or run the formation cost calculator for a specific state.

Frequently asked questions

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