S Corp vs LLC: Taxes, Pros and Cons for Small Businesses

Quick answer: S corp vs LLC is not an either-or choice of entity. An LLC is a legal structure; an S corporation is a tax election that an LLC can make. Default LLC owners pay self-employment tax on all profit. With an S election, owners take a reasonable salary and pay payroll tax only on that, which can save money once profits are high enough.

Small business owners hear the same advice at almost every networking event: "You should be an S corp." Sometimes that is right. Often it is premature. The election can cut Social Security and Medicare taxes, but it adds payroll, a separate tax return, stricter bookkeeping and an IRS rule on owner pay that you cannot ignore.

This S corp vs LLC guide compares a default LLC with an LLC or corporation taxed as an S corp: how each is taxed, what reasonable compensation means, the costs, and worked examples that show where the break-even point sits. If you are still deciding whether to form an LLC at all, start with our guide to LLC vs sole proprietorship.

This is general information about US federal tax rules as checked in October 2026, not tax or legal advice. State rules differ, and your numbers depend on your facts. Talk to a CPA or enrolled agent before making an election.

S corp vs LLC at a glance

Area	LLC with default taxation	LLC or corporation taxed as an S corp
What it is	State-law entity	Federal tax election (Form 2553)
Liability protection	Yes, from the LLC itself	Same; comes from the underlying LLC or corporation
Federal return	Single member: owner's Schedule C; multi-member: Form 1065	Form 1120-S, with a Schedule K-1 for each shareholder
Owner pay	Draws; no payroll needed	Reasonable salary through payroll, plus distributions
Social Security and Medicare	Self-employment tax on owner's share of net earnings	Payroll taxes on salary only; distributions not subject to them
Owners allowed	Any number, any type	Up to 100 eligible shareholders; no nonresident aliens, partnerships or corporations
Profit splits	Flexible for multi-member LLCs under the operating agreement	Must follow ownership; one class of stock
Admin and cost	Lower	Higher: payroll filings, separate return, cleaner books

How a default LLC is taxed

By default, the IRS ignores a single-member LLC for income tax purposes. The owner reports business income and expenses on Schedule C and pays income tax plus self-employment tax on net earnings. A multi-member LLC is taxed as a partnership by default, filing Form 1065 and passing each member's share through on Schedule K-1.

Self-employment tax is 15.3% on 92.35% of net earnings: 12.4% for Social Security up to the annual wage base ($184,500 for 2026) and 2.9% for Medicare with no cap. It applies to all of an active owner's share of profit, whether the money is left in the business or withdrawn. Owners usually pay it through quarterly estimated taxes.

How S corp taxation works

An S corporation is a pass-through entity too. According to the IRS overview of S corporations, income, losses, deductions and credits flow through to shareholders, who report them on their personal returns. The difference is how the owner is paid.

An owner who works in the business becomes an employee. The company runs payroll, withholds income tax and the employee's 7.65% of FICA, pays the employer's matching 7.65%, and pays unemployment taxes. Remaining profit can be paid out as distributions, which are taxed as income on the owner's return but are not subject to Social Security and Medicare tax. That gap is the entire source of the savings.

Who can elect

The IRS requires a domestic corporation or eligible entity with no more than 100 shareholders, only allowable shareholders (individuals, certain trusts and estates, not partnerships, corporations or nonresident aliens), and one class of stock. All shareholders sign Form 2553, which is generally due no more than two months and 15 days after the start of the tax year the election should take effect.

Reasonable salary: the rule that decides the savings

The IRS says S corporations must pay reasonable compensation to a shareholder-employee for services before taking non-wage distributions, and it can reclassify distributions as wages if pay is too low. Its page on S corporation compensation lists factors including:

• Training and experience
• Duties and responsibilities
• Time and effort devoted to the business
• Payments to non-shareholder employees
• What comparable businesses pay for similar services
• Dividend history and the timing of bonuses

The key, in the IRS's words, is determining what the shareholder-employee did for the S corporation. There is no IRS-approved percentage split, so treat rules of thumb like "60% salary, 40% distributions" with caution. A consultant who generates nearly all revenue personally will struggle to justify a low salary; a business whose profit comes mostly from staff or equipment has more room. Keep a short memo with salary data for your role.

Worked examples: when does the election pay?

The figures below are illustrative. They compare only Social Security and Medicare taxes plus assumed extra costs, and ignore income tax, state taxes and the qualified business income deduction, all of which can change the result.

Example 1: $120,000 of profit

Default LLC:

• Net earnings for self-employment tax: $120,000 x 92.35% = $110,820
• Self-employment tax: $110,820 x 15.3% = $16,955.46

S corp with a $70,000 reasonable salary:

• Employee FICA: $70,000 x 7.65% = $5,355
• Employer FICA: $70,000 x 7.65% = $5,355
• Total payroll tax: $5,355 + $5,355 = $10,710
• Remaining profit (after salary and employer FICA) of $44,645 is paid as distributions, free of payroll tax.

Comparison: $16,955.46 - $10,710 = $6,245.46 in payroll tax saved. Subtract assumed extra costs of $2,500 a year (payroll service, Form 1120-S preparation, unemployment taxes): $6,245.46 - $2,500 = $3,745.46 net saving.

Example 2: $50,000 of profit

• Default LLC: $50,000 x 92.35% = $46,175; $46,175 x 15.3% = $7,064.78
• S corp with a $40,000 salary: $40,000 x 15.3% = $6,120
• Payroll tax saved: $7,064.78 - $6,120 = $944.78
• After the same $2,500 of assumed costs: $944.78 - $2,500 = -$1,555.22, a net loss

The pattern is what matters. Savings grow with the gap between profit and a defensible salary; costs are mostly fixed. Below a certain profit level the election costs more than it saves, and that level depends heavily on what salary your role requires.

Other effects to model

• Qualified business income deduction: for S corps, wages paid to the owner are not part of qualified business income, so the deduction can be smaller than for a default LLC.
• Retirement contributions: some plans base contributions on W-2 salary, so a lower salary can limit them.
• Social Security benefits: lower taxed earnings can mean lower future benefits.
• State taxes: some states charge entity-level taxes or fees on S corporations.

Multi-member LLCs and partners

The S corp vs LLC trade-off looks different when there are several owners. A multi-member LLC taxed as a partnership can allocate profits and losses flexibly under its operating agreement, for example giving one partner a larger share in a year when they brought in more work, provided the allocations follow partnership tax rules. An S corporation cannot do that: with one class of stock, distributions must follow ownership percentages, and each working owner needs their own reasonable salary. Partners who value flexible splits, or who plan to bring in an investor that is itself a company or a non-US person, may find the S election too restrictive. Partners with equal ownership, similar roles and steady profits are more likely to benefit.

Pros and cons

Default LLC

• Pros: simple to run, no payroll, flexible profit splits for multi-member LLCs, fewer filings.
• Cons: self-employment tax on all active profit.

S corp election

• Pros: payroll tax only on salary, which can mean meaningful savings at higher profits; owner salary through payroll can simplify personal tax withholding.
• Cons: payroll and extra returns, reasonable-salary scrutiny, ownership restrictions, less flexible profit allocation, and revoking the election generally blocks re-electing for five years without IRS consent.

Checklist before electing S corp status

1. Confirm your business has steady profit, not just revenue; our explainer on revenue vs profit covers the difference.
2. Research a reasonable salary for your role and document the sources.
3. Estimate payroll, accounting and state costs with real quotes.
4. Model at least two years using your profit and loss statement.
5. Check that every owner is an eligible shareholder.
6. Make sure the business has an EIN; see how to get an EIN.
7. File Form 2553 on time, signed by all shareholders.
8. Set up payroll before the first owner paycheck and keep business and personal money separate.

Common mistakes

• Electing too early. At modest profits, fixed costs can exceed the payroll tax saved.
• Paying no salary or a token salary. The IRS can reclassify distributions as wages and assess tax, penalties and interest.
• Taking distributions out of proportion to ownership. With one class of stock, distributions should follow ownership percentages.
• Mixing personal and business spending. S corps need clean books; our bookkeeping basics guide covers the habits.
• Forgetting state rules, which can add taxes or ignore the election.
• Confusing the owner's status with contractors'. Owner-employees are on payroll; outside help may be employees or contractors under the tests in our W-2 vs 1099 guide.

Invoicing does not change much

Clients see little difference between an LLC and an S corp. Invoices should show the legal business name exactly as registered, including "LLC" or "Inc." where applicable, and the business, not you personally, should be paid. The free US invoice generator creates a PDF with your business details in the browser; it does not run payroll, file returns or make elections.

Bottom line

For S corp vs LLC, the useful question is whether your LLC should elect S corp taxation now. If profits comfortably exceed a defensible salary plus the extra costs, the election can save thousands a year. If not, the default LLC is simpler and often cheaper. Run the numbers with your own figures and a professional before you file.