S Corp vs LLC Taxes 2026: 7 Smart Rules Before You Elect

S Corp vs LLC taxes is one of the most searched questions among small-business owners, and for good reason: the choice can move thousands of dollars a year between you and the IRS. The short version is that an LLC is a legal entity under state law, while an S corporation is a federal tax election. Many profitable LLC owners file one form and start saving on self-employment tax, and many others elect too early and lose money on payroll costs and a smaller deduction.

This guide walks through S Corp vs LLC taxes for 2026 using the rules in place after the One Big Beautiful Bill Act (OBBBA), signed July 4, 2025. You will see exactly how the election cuts self-employment tax, what counts as a reasonable salary, where the break-even income usually sits, and how the Section 199A QBI deduction and state pass-through entity taxes (PTET) change the math.

We use worked dollar examples for a typical US owner throughout. By the end you should know whether to file Form 2553 this year, wait a year, or skip the election entirely.

Table of Contents

1. S Corp vs LLC Taxes: The Core Difference
2. How the S Corp Election Cuts Self-Employment Tax
3. Reasonable Salary: The Rule That Makes or Breaks It
4. Break-Even Income for S Corp vs LLC Taxes
5. How the QBI Deduction Changes the Math
6. Retirement, Health Insurance and Other Side Effects
7. PTET and the 2026 SALT Cap
8. When Not to Elect S Corp Status
9. Form 2553 and Ongoing Compliance
10. Common S Corp vs LLC Taxes Mistakes
11. FAQ
12. Conclusion: 7 Smart Rules Before You Elect

S Corp vs LLC Taxes: The Core Difference

The first thing to understand about S Corp vs LLC taxes is that you are not really choosing between two entities. An LLC is created under state law and gives you liability protection and flexibility. An S corporation is a tax status that an LLC (or a corporation) can elect with the IRS.

If you are still fuzzy on the legal side, our explainer on what LLC means and how it works covers formation basics. Here we focus purely on the tax side.

Default LLC taxation under S Corp vs LLC taxes rules

A single-member LLC is a “disregarded entity” by default. Its profit lands on Schedule C of your Form 1040, and the full net profit is subject to self-employment tax. A multi-member LLC is taxed as a partnership, files its own information return, and passes profit to members on Schedule K-1, with active members generally paying self-employment tax on their share.

Either way, you pay income tax at your individual rates (10% to 37%, now permanent under OBBBA) plus self-employment tax on the profit, and you take draws rather than a W-2 salary.

LLC taxed as an S corporation

When the LLC elects S corp status, it becomes a pass-through corporation for tax purposes. The business files Form 1120-S, and you, as an owner who works in the business, become an employee on payroll. Profit is split into two buckets: a W-2 salary subject to payroll taxes and remaining profit that passes through on a K-1 and can be distributed without payroll tax.

Income tax still applies to both buckets at your personal rates. The S corp does not pay the 21% corporate rate; that rate applies only to C corporations. So the S Corp vs LLC taxes debate is almost entirely about payroll tax, the QBI deduction, and state-level rules.

Feature	LLC (default taxation)	LLC taxed as S corp
Federal return	Schedule C (single-member) or Form 1065 (multi-member)	Form 1120-S plus owner K-1s
Owner pay	Draws; no W-2	W-2 salary plus distributions
Self-employment / payroll tax	15.3% on net SE earnings (Social Security portion up to $184,500)	15.3% on salary only (split employer/employee)
Corporate income tax	None	None at federal level (21% applies only to C corps)
QBI deduction base	Net profit (after half of SE tax and other adjustments)	Profit after salary; wages are not QBI
2026 return due date	April 15, 2027 (Schedule C) / March 15, 2027 (partnership)	March 15, 2027
Payroll filings	Not required for the owner	Required: quarterly payroll returns, W-2s

How the S Corp Election Cuts Self-Employment Tax

Self-employment tax is 15.3% in 2026: 12.4% for Social Security and 2.9% for Medicare. The Social Security portion stops at a wage base of $184,500, while Medicare has no cap. An Additional Medicare Tax of 0.9% applies to earnings over $200,000 (single) or $250,000 (married filing jointly).

For a sole proprietor or default LLC, the tax applies to 92.35% of net profit (profit reduced by the employer-equivalent half, 7.65%). Every dollar of profit up to the wage base is hit with the full 15.3% rate on that adjusted amount.

Where the savings come from

An S corp pays the same 15.3% (7.65% employer plus 7.65% withheld from you), but only on your W-2 salary. Profit above that salary flows through as a distribution with no Social Security or Medicare tax. That gap is the entire payroll-tax advantage in S Corp vs LLC taxes.

Worked example: a $150,000 consulting LLC

Maria runs a single-member marketing consulting LLC with $150,000 of net profit in 2026. She is single and takes the standard deduction of $16,100.

• As a default LLC: $150,000 × 92.35% = $138,525 of net SE earnings. SE tax = $138,525 × 15.3% ≈ $21,194.
• As an S corp with a $70,000 salary: payroll tax = $70,000 × 15.3% = $10,710 (half paid by the company, half withheld).
• Gross payroll tax savings: $21,194 − $10,710 = $10,484.

That $10,484 is the number most promoters quote, but it is not Maria’s real savings. Income tax, QBI and compliance costs all move, as the QBI section below shows.

Reasonable Salary: The Rule That Makes or Breaks It

Reasonable compensation is the non-negotiable rule of S Corp vs LLC taxes: it is required for S corp owner-employees. If you work in the business, you must pay yourself a salary that reflects what the business would pay someone else to do your job before you take distributions.

The IRS does not publish a fixed percentage. The popular “60/40 rule” (60% salary, 40% distributions) is a rule of thumb, not an IRS standard, and it can be wrong in either direction.

What drives a reasonable salary

• Your role and hours: a full-time owner who does all the client work needs a higher salary than a part-time owner who manages staff.
• Market pay for the job: compare to salary surveys or job listings for similar roles in your area.
• Where the profit comes from: if revenue comes almost entirely from your personal services, the salary should capture most of it. If employees, equipment or intellectual property generate a large share, a lower salary can be supported.

Why a lowball salary backfires

If the IRS decides your salary was unreasonably low, it can recharacterize distributions as wages. That means back payroll taxes plus penalties and interest, which can wipe out years of savings. Courts have consistently sided with the IRS when owners paid themselves little or nothing while taking large distributions.

Document your salary decision each year. A one-page memo with market data, your duties and hours, and the reasoning behind the figure is inexpensive insurance and a core part of any defensible S Corp vs LLC taxes plan.

Example: two very different owners

James, a solo developer, earns $180,000 of profit entirely from his own coding, so a $45,000 salary would be hard to defend. Priya earns the same $180,000 from a cleaning company where eight employees do the work, so a salary based on an operations manager’s pay is far easier to support. Same profit, very different S Corp vs LLC taxes outcomes.

Break-Even Income for S Corp vs LLC Taxes

The S corp election is not free, and S Corp vs LLC taxes math must include its costs. You will usually pay for payroll processing, a separate business return (Form 1120-S), state filings and often higher bookkeeping costs. Some states also charge annual fees or taxes on S corporations.

For the table below we assume $3,000 a year in extra costs. This is an illustrative assumption only; your number could be lower or higher depending on your state, payroll provider and accountant. Figures ignore the Additional Medicare Tax, income tax effects and QBI to isolate the payroll piece of S Corp vs LLC taxes.

Net profit	Assumed reasonable salary	LLC SE tax	S corp payroll tax on salary	Gross payroll savings	Net after $3,000 costs
$40,000	$32,000	$5,652	$4,896	$756	−$2,244
$60,000	$40,000	$8,478	$6,120	$2,358	−$642
$80,000	$45,000	$11,304	$6,885	$4,419	$1,419
$100,000	$55,000	$14,130	$8,415	$5,715	$2,715
$150,000	$70,000	$21,194	$10,710	$10,484	$7,484
$200,000	$90,000	$28,234	$13,770	$14,464	$11,464
$250,000	$110,000	$29,573	$16,830	$12,743	$9,743

Reading the table

At $40,000 or $60,000 of profit, the election loses money once costs are counted. Around $80,000 it turns positive, but the gain is modest and can disappear once the QBI and income tax effects are included. By $100,000 to $150,000, the S Corp vs LLC taxes comparison usually favors the S corp, as long as your salary is reasonable.

Notice that savings fall between $200,000 and $250,000 in this example. That is the Social Security wage base at work: the sole proprietor stops paying 12.4% above $184,500, while the S corp salary keeps rising with profit.

Stable profit matters more than one good year

Base break-even on profit you expect every year, not a single strong year. If income swings between $40,000 and $140,000, you pay S corp costs in lean years with nothing to show for them, which is why S Corp vs LLC taxes planning favors waiting for steady profit.

How the QBI Deduction Changes the Math

The Section 199A qualified business income (QBI) deduction lets many pass-through owners deduct up to 20% of their QBI. OBBBA made it permanent. For 2026 the threshold is $201,750 (single) or $403,500 (married filing jointly), and the phase-in range widened to $75,000 single and $150,000 joint, so limits are fully phased in at $276,750 and $553,500.

Starting in 2026, there is also a minimum deduction of $400 for taxpayers with at least $1,000 of QBI from active businesses. The IRS explains the basics on its qualified business income deduction page.

Why S corp wages reduce QBI

Your W-2 salary from the S corp is not QBI, a point that surprises many owners comparing S Corp vs LLC taxes. Only the profit left after salary and the employer’s share of payroll tax counts. So every dollar you move into salary shrinks the base for your 20% deduction, which is a hidden cost in S Corp vs LLC taxes comparisons.

Finishing Maria’s example

Recall Maria’s $150,000 consulting profit, a $70,000 salary, single filing status and the $16,100 standard deduction. Here is a simplified comparison assuming a 22% marginal rate on the difference.

• Default LLC: AGI = $150,000 − $10,597 (half of SE tax) = $139,403. Taxable income before QBI = $123,303. QBI deduction is limited to 20% of that taxable income, about $24,661, leaving roughly $98,642 of taxable income.
• S corp: the company deducts the $70,000 salary and $5,355 employer payroll tax, leaving $74,645 of K-1 income. AGI = $144,645; taxable income before QBI = $128,545. QBI deduction = 20% × $74,645 = $14,929, leaving about $113,616 of taxable income.
• Extra taxable income under the S corp: about $14,974, or roughly $3,294 more income tax at 22%.

So Maria’s real result is about $10,484 of payroll savings, minus $3,294 of extra income tax, minus an assumed $3,000 of costs: roughly $4,190 a year. Still worth doing, but far less than the headline figure. This is why an honest S Corp vs LLC taxes analysis always includes QBI.

When the S corp can help QBI

Above the $201,750 / $403,500 thresholds, the QBI deduction for non-service businesses becomes limited by the W-2 wages the business pays (and the basis of its qualified property). A sole proprietor with no employees may lose much of the deduction at high income. An S corp salary counts as W-2 wages and can preserve some or all of it.

For specified service trades or businesses (SSTBs), such as consulting, law, health and financial services, the deduction phases out entirely above the upper limit regardless of wages. For high-income SSTB owners, QBI is not a reason to elect either way, so the S Corp vs LLC taxes decision comes down mostly to payroll tax and state rules.

Retirement, Health Insurance and Other Side Effects

Payroll tax and QBI are the headline items in S Corp vs LLC taxes, but several second-order effects can tilt S Corp vs LLC taxes one way or the other. Check each before you file Form 2553.

Retirement contributions shrink with a low salary

In an S corp, employer retirement contributions are based on your W-2 salary, not total profit. For 2026 the 401(k) employee deferral limit is $24,500, the catch-up for age 50+ is $8,000, and the total annual additions limit is $72,000. Employer contributions can generally reach up to 25% of W-2 compensation.

Using Maria’s numbers:

• Default LLC with a solo 401(k): employee deferral of $24,500 plus an employer contribution of about 20% of net SE earnings ($139,403 × 20% ≈ $27,881) = roughly $52,381.
• S corp with a $70,000 salary: $24,500 deferral plus 25% × $70,000 = $17,500 employer contribution = $42,000.

If Maria wants to shelter the maximum, she may need a higher salary, which reduces her payroll savings. Also note that from 2026, catch-up contributions for employees whose prior-year FICA wages exceeded $150,000 must be Roth.

Home office and reimbursements

S corp owners are W-2 employees, who cannot deduct a home office personally, so the company should reimburse you through an accountable plan. Default LLC owners can still claim it directly, including the simplified $5 per square foot method (up to $1,500). For more ideas beyond S Corp vs LLC taxes, see our list of 30 ways to save federal tax.

Estimated taxes and withholding

As an S corp owner, your salary has income tax withheld through payroll, but distributions do not. You will usually still owe quarterly estimates on the K-1 income. For 2026, estimated payments are due April 15, June 15 and September 15, 2026, and January 15, 2027.

The safe harbor is paying 100% of last year’s tax (110% if prior-year AGI exceeded $150,000) or 90% of this year’s tax. The IRS page on estimated taxes lists payment options, including IRS Direct Pay and EFTPS.

PTET and the 2026 SALT Cap

The state and local tax (SALT) deduction cap is $40,400 for 2026, reduced for modified AGI over $505,000 but not below $10,000. It reverts to $10,000 in 2030. For high earners in high-tax states, that cap can make much of their state income tax non-deductible.

Pass-through entity tax (PTET) elections remain a workaround in many states. The business pays state income tax at the entity level and deducts it as a business expense, so it never hits your personal SALT cap. Owners then get a credit or exclusion on their state return.

Why PTET matters in S Corp vs LLC taxes

PTET is an underrated piece of S Corp vs LLC taxes. Most state PTET regimes are available to partnerships and S corporations. In many states, a single-member LLC taxed as a sole proprietorship is not eligible, because it is disregarded for tax purposes. That means the S corp election can unlock PTET for a solo owner who could not use it otherwise.

Worked PTET example

Assume David, a single owner in a high-tax state, has income high enough that his SALT cap is reduced to the $10,000 floor, and property taxes already use that up. His business generates $30,000 of state income tax, and he is in the 35% federal bracket.

• Without PTET: the $30,000 of state income tax adds nothing to his federal deductions because his cap is already used.
• With an S corp PTET election: the company deducts the $30,000, reducing his federal taxable income by $30,000, worth about $10,500 at 35%.

Rules vary widely by state, and some require the election annually. Always confirm the current rules with a tax professional before relying on PTET in your S Corp vs LLC taxes plan.

When Not to Elect S Corp Status

The election is powerful, but it is not for everyone. Here are situations where staying with default LLC taxation often wins the S Corp vs LLC taxes comparison.

Your profit is too low for S Corp vs LLC taxes savings

If steady net profit is below roughly $60,000 to $80,000, compliance costs and QBI losses usually outweigh payroll savings. Startups with losses gain nothing from the election on day one, because there is no self-employment tax to save on a loss.

You plan to raise outside capital

S corps can only have a limited number of shareholders, generally must be US individuals (plus certain trusts and estates), and can have only one class of stock. Venture investors typically want a C corporation with preferred stock. Founders planning to raise money may also want Section 1202 QSBS treatment, which for stock issued after July 4, 2025 offers an exclusion cap of $15 million and requires a C corporation.

You need flexible profit splits

Partnership-taxed LLCs can make special allocations that ignore ownership percentages. S corps must distribute profit strictly in proportion to ownership.

Your state penalizes S corps

Some states and cities do not fully recognize the S election or impose entity-level taxes or fees that can erase much of the federal savings.

Form 2553 and Ongoing Compliance

Once your S Corp vs LLC taxes analysis says yes, an LLC elects S corp status by filing Form 2553, Election by a Small Business Corporation. An LLC that files a valid Form 2553 is treated as having also elected to be taxed as a corporation, so a separate entity classification election is generally not needed.

Timing the election

The election must be filed within a short window near the start of the tax year you want it to apply to, or at any time during the prior tax year. Check the current IRS instructions for the exact deadline. See the IRS About Form 2553 page for the latest form and filing addresses.

Missed it? The IRS offers late-election relief if you had reasonable cause and meet certain conditions, but it is not automatic.

Filing checklist for Form 2553

1. Confirm eligibility: domestic entity, eligible shareholders only, and one class of stock.
2. Choose the effective date, usually January 1 of the year you want S corp treatment.
3. Get consent signatures from every shareholder (and spouses in community property states when required).
4. File by mail or fax as the instructions direct, and keep proof of filing.
5. Keep the IRS acceptance letter permanently.

Ongoing compliance after you elect

• Payroll: run regular payroll for owner-employees, withhold taxes, and file quarterly payroll returns and annual W-2s.
• Form 1120-S: the 2026 return is due March 15, 2027, with K-1s issued to each owner.
• Clean books: keep business and personal funds separate and track shareholder basis so distributions stay tax-free.
• State filings: file state S corp returns, any PTET elections and state payroll registrations.
• Information returns: the 1099-NEC threshold for payments made in 2026 rises to $2,000.

A bookkeeping partner makes this routine. Our accounting services cover payroll setup, monthly books and year-end reporting for S corps.

Common S Corp vs LLC Taxes Mistakes

These are the errors we see most often when owners handle S Corp vs LLC taxes on their own. Each one is avoidable with a little planning.

1. Paying no salary at all

Taking only distributions is the most common S Corp vs LLC taxes error and the fastest way to invite IRS scrutiny. If you work in the business and it is profitable, you need a reasonable salary on payroll.

2. Electing too early

Filing Form 2553 in year one with $30,000 of profit usually costs more than it saves. Wait until profit is steady and above the break-even range.

3. Ignoring the QBI and income tax effect

Comparing only SE tax to payroll tax overstates the S Corp vs LLC taxes benefit. As Maria’s example shows, the extra income tax from a smaller QBI deduction can claw back a third or more of the gross savings.

4. Taking disproportionate distributions

With multiple owners, distributions must match ownership percentages. Uneven distributions can be treated as a second class of stock, which can terminate the S election.

5. Forgetting estimated taxes

Distributions have no withholding, so adjust estimates or payroll withholding to avoid underpayment penalties.

6. Skipping the state review

State fees, entity taxes and PTET opportunities can change the S Corp vs LLC taxes answer. A federal-only analysis is incomplete.

FAQ

Is an S corp better than an LLC for taxes?

For S Corp vs LLC taxes, it depends on profit. For owners with steady net profit around $80,000 to $100,000 or more who can pay a reasonable salary, the S corp election often saves money. Below that, default LLC taxation is usually simpler and cheaper once costs and QBI are counted.

Can my LLC be an S corp?

Yes. An LLC keeps its legal status under state law and simply elects S corp tax treatment by filing Form 2553. You do not need to form a new corporation.

How much salary should I pay myself as an S corp owner?

In S Corp vs LLC taxes planning, pay what the business would pay someone else to perform your role, based on duties, hours, experience and market rates. There is no official IRS percentage, so document your reasoning each year.

Does an S corp reduce my QBI deduction?

Usually, yes. Your W-2 salary is not QBI, so the deduction is calculated on a smaller base. Above the $201,750 single / $403,500 joint thresholds, however, S corp wages can help non-service businesses meet the W-2 wage limit.

What is the break-even point for S Corp vs LLC taxes?

With an assumed $3,000 of extra annual costs, payroll savings typically turn positive around $80,000 of profit and become meaningful above $100,000. Your break-even depends on your salary, state costs and QBI situation.

Can I use PTET as a single-member LLC?

In many states, a single-member LLC taxed as a sole proprietorship is not eligible for PTET. Electing S corp status can make the business eligible where the state allows S corps to elect.

When is the 2026 S corp tax return due?

Form 1120-S for the 2026 tax year is due March 15, 2027. Individual returns, including Schedule C filers, are due April 15, 2027.

Conclusion: 7 Smart Rules Before You Elect

S Corp vs LLC taxes comes down to a few numbers you can estimate in an afternoon. Use these seven rules to decide with confidence:

1. Start with steady profit. Base your decision on profit you expect to earn every year, not one great year.
2. Set a defensible salary first. Calculate savings only after choosing a reasonable salary you can document.
3. Include all costs. Payroll processing, the 1120-S, state fees and bookkeeping belong in the math.
4. Run the QBI and income tax numbers. They can reduce headline savings by thousands.
5. Check retirement goals. A low salary can cap your 401(k) contributions.
6. Look at your state. PTET can add savings; entity taxes can take them away.
7. File Form 2553 on time. Missing the window can delay your savings by a full year.

Looking at S Corp vs LLC taxes as a whole, for many profitable owners the S corp election is one of the most reliable tax savings available in 2026. For others, the smarter move is to stay a default LLC and revisit next year. The right answer for your S Corp vs LLC taxes question depends on your profit, salary, state and long-term plans.

Disclaimer: This article provides general information only and is not tax, legal or accounting advice. Tax rules are complex and depend on your specific facts, state and circumstances. Consult a qualified CPA or tax advisor before making any entity or election decision. Figures are current as of September 2026 and may change.