S Corp vs LLC Tax Differences Explained: 2026 Guide

Your business is finally turning a real profit, and someone at a networking lunch says you should “become an S corp.” Your accountant mentions an LLC. This guide gives you the S corp vs LLC tax differences explained in plain terms, with 2026 IRS numbers and a worked example you can check yourself.

Here’s the part that clears up most of the confusion. An LLC is a legal entity you form with your state. S corporation status is a federal tax treatment you elect with the IRS, and an LLC can choose it.

So the real question usually isn’t “LLC or S corp?” It’s “Should my LLC keep its default tax treatment, or elect to be taxed as an S corp?” The answer depends on your profit, your salary, your state, and one deduction most comparisons leave out.

LLC Is a Legal Entity, S Corp Is a Tax Status

A limited liability company (LLC) exists under state law. You file articles of organization, pay a state fee, and get a liability shield between your business debts and your personal assets.

The IRS doesn’t have an “LLC tax return.” Instead, it slots every LLC into an existing tax category. A one-owner LLC is a “disregarded entity” by default, which means it’s taxed like a sole proprietorship. An LLC with two or more members is taxed as a partnership.

S corporation status is a set of tax rules under Subchapter S of the Internal Revenue Code. A corporation or an LLC files Form 2553 to elect it. The legal entity stays the same, and your liability protection doesn’t change at all.

The IRS spells out these default rules on its LLC tax classification page. Once you see the two as separate layers (legal form and tax treatment), every other difference makes sense.

How an LLC Is Taxed by Default

Both default LLC setups are “pass-through” taxation. The business itself pays no federal income tax. Profit flows to the owners, who report it on their personal returns.

Single-Member LLC

You report income and expenses on Schedule C, attached to your Form 1040. If that form is new to you, our guide on what Schedule C on a 1040 is walks through it line by line.

Your net profit then goes to Schedule SE for self-employment tax. That’s 15.3% on 92.35% of your net earnings: 12.4% for Social Security and 2.9% for Medicare. Our walkthrough on how to calculate self-employment tax shows the math step by step.

Multi-Member LLC

The LLC files Form 1065, a partnership return, and sends each member a Schedule K-1. Members report their share on their own returns. Those who work in the business generally owe self-employment tax on their share of ordinary income.

Neither version withholds tax from your profit. That’s why default LLC owners make quarterly estimated tax payments for an LLC instead.

How S Corp Taxation Works

An S corp is also a pass-through entity. It files Form 1120-S each year, pays no federal income tax in most cases, and issues K-1s to shareholders. Our Form 1120-S instructions cover that return in detail.

The big change is how you get paid. As an owner who works in the business, you become an employee of your own company. You take a W-2 salary, and the company withholds income tax and FICA (Social Security and Medicare) from it.

Whatever profit is left after salary and expenses can come out as distributions. Distributions still count as income on your 1040, but they aren’t subject to Social Security or Medicare tax. That gap is where the savings come from.

To qualify, the business must be a domestic entity with no more than 100 shareholders and only one class of stock. Shareholders must be US citizens or residents, certain trusts, or estates. Partnerships, corporations, and nonresident aliens can’t own shares, as the IRS notes on its S corporation requirements page.

S Corp vs LLC Tax Differences Explained Side by Side

This table compares a default LLC with an LLC (or corporation) taxed as an S corp. Figures reflect the 2026 tax year.

The Self-Employment Tax Gap

Payroll tax is the main reason owners consider the switch. With a default LLC, the IRS treats nearly all of your profit as earnings from self-employment.

Under an S corp, only your salary carries FICA. You and the company each pay 7.65%, which adds up to the same 15.3%. Distributions above that salary skip it entirely.

Two limits shape how big the gap gets. The Social Security part (12.4%) applies only up to the wage base, which is $184,500 for 2026. Above that, only the 2.9% Medicare tax continues, so the percentage savings shrink at higher incomes.

The 0.9% Additional Medicare Tax applies either way once wages or self-employment income pass $200,000 for a single filer ($250,000 married filing jointly). Neither structure avoids it on the earnings it reaches.

Reasonable Salary: The Rule That Sets Your Savings

If distributions dodge payroll tax, why not pay yourself $10,000 and take the rest as distributions? Because the IRS requires S corp owners who work in the business to take “reasonable compensation” first.

Reasonable means roughly what the business would pay someone else to do your job. The IRS looks at your training, duties, hours, and what comparable businesses pay for similar work. Its guidance on S corporation compensation rules lists these factors.

Courts back this up. In Watson v. United States, an Iowa CPA paid himself $24,000 while taking far larger distributions. The court reset his reasonable pay to more than $91,000 and assessed the payroll taxes on the difference.

A defensible salary usually comes from salary surveys, job posting data, or Bureau of Labor Statistics wage figures for your role and region. Keep that research in your files. It’s your best evidence if the IRS ever asks.

The QBI Trade-Off Most Comparisons Skip

The qualified business income (QBI) deduction lets many pass-through owners deduct up to 20% of their business profit. The One Big Beautiful Bill Act made it permanent, and starting in 2026 there’s a $400 minimum deduction if you have at least $1,000 of qualifying income.

Here’s the catch. W-2 wages you pay yourself from an S corp don’t count as QBI. Only the profit left after salary does.

With a default LLC, your QBI is your full net profit, minus a few adjustments like half of your self-employment tax. So when you elect S corp status, you trade payroll tax savings for a smaller QBI deduction. That raises your income tax a bit.

For 2026, the full deduction is available below $201,750 of taxable income for single filers and $403,500 for joint filers. Between those numbers and $276,750 (single) or $553,500 (joint), limits phase in. They’re based on W-2 wages paid and, for service businesses like law, accounting, and consulting, the deduction phases out completely.

Above those thresholds, the math can flip. An S corp’s W-2 wages can help a non-service business keep its QBI deduction, which a default LLC with no employees can’t do.

A Worked Example with 2026 Numbers

Take a single owner of a one-person consulting LLC with $120,000 of net profit in 2026, no other income, and the $16,100 standard deduction. In the S corp version, the owner takes a $60,000 salary.

Payroll tax drops by about $7,775. But income tax rises by about $2,616, mostly because the QBI deduction shrinks. The real federal savings are closer to $5,160, not the $7,775 a quick payroll calculation suggests.

From there, subtract the extra costs of running an S corp (covered next). If those run $2,000 a year, the owner keeps roughly $3,000. That’s worth having, but it isn’t the windfall many online calculators promise.

Change the numbers and the result changes fast. At $60,000 of profit and a $45,000 salary, the savings may not cover the added costs. Run your own figures through our S corp tax calculator before you decide.

Costs and Paperwork an S Corp Adds

Electing S corp status turns a simple tax life into a small payroll operation. Expect these added costs and tasks:

• Payroll service. Most owners pay a provider to run payroll, file Forms 941 and 940, and issue a W-2.
• Separate business return. Form 1120-S costs more to prepare than a Schedule C, often $1,000 or more with a CPA.
• Unemployment taxes. Federal unemployment tax is 0.6% of the first $7,000 of wages after the usual credit, plus your state’s rate.
• Cleaner books. You need a balance sheet, shareholder basis tracking, and clear records of distributions.
• Earlier deadline. Form 1120-S is due March 15 for calendar-year companies. Our S corp tax deadline guide covers extensions and late penalties.

There are smaller trade-offs too. Retirement plan contributions based on pay, like a SEP-IRA or the employer side of a Solo 401(k), are figured on your W-2 salary, not total profit. A low salary can cap them, as our SEP-IRA contribution limits guide explains.

Health insurance also needs care. If you own more than 2% of an S corp, the company pays or reimburses your premiums and adds them to your W-2. You then take the self-employed health insurance deduction on your 1040. Skip the W-2 step and you can lose the deduction.

Loss Rules and Profit Splits Differ Too

Two technical differences matter most for businesses with partners or debt.

First, losses. Owners of both structures can deduct losses only up to their “basis,” roughly what they’ve invested. A multi-member LLC member’s basis includes a share of the business’s loans. An S corp shareholder’s basis doesn’t include bank loans to the company, only loans the shareholder personally made to it.

Second, profit splits. An LLC taxed as a partnership can divide profit in ways that don’t match ownership, if the operating agreement supports it. S corps must split income and distributions strictly by shares owned, because each can have only one class of stock. Uneven distributions can put the election at risk.

State Taxes Can Flip the Math

Federal savings are only half the story. Several states treat S corps and LLCs differently, and some charge entity-level taxes that erase part of the benefit.

• California: S corps pay a 1.5% franchise tax on net income, with an $800 minimum. LLCs pay the $800 annual tax plus a separate fee once gross receipts reach $250,000.
• New York City: The city doesn’t recognize the S election. S corps pay the city’s General Corporation Tax as if they were regular corporations.
• Tennessee: Both LLCs and S corps generally owe franchise and excise taxes at the entity level.

Many states also have pass-through entity tax (PTET) elections, which can work differently for each structure. A local CPA who knows your state’s rules can show you the full picture. Our guide to finding a small business CPA explains what to look for.

How to Elect S Corp Status for Your LLC

If the numbers work, the election itself is a short form. Follow these steps:

1. Confirm eligibility. Check that every owner is an allowed shareholder and that your operating agreement doesn’t create a second class of stock.
2. Set a reasonable salary. Document how you chose it before your first payroll run.
3. File Form 2553. Every owner must sign. An LLC that files Form 2553 doesn’t need a separate Form 8832.
4. Meet the deadline. File no later than 2 months and 15 days after the start of the tax year the election should take effect. For a calendar-year business, that’s March 15.
5. Start payroll. Register for state withholding and unemployment accounts, then pay yourself on a regular schedule.

Missed the deadline? Revenue Procedure 2013-30 lets many businesses request late election relief within 3 years and 75 days of the intended effective date. You’ll need a reasonable cause statement explaining why the form was late.

When Each Option Usually Makes Sense

A default LLC tends to fit when your profit is modest or uneven, you’re in your first year or two, or you want the simplest filing possible. It also suits partnerships that need flexible profit splits or investors an S corp can’t accept.

An S corp election tends to fit when profit is steady and well above a market salary for your role. It also helps when you’re willing to run payroll and keep tighter books, and when your state doesn’t add an entity tax that wipes out the savings.

If you’re still setting up, start with our checklist for filing LLC business taxes for the first time. Clean books from day one also make a later election easier, and our guide to bookkeeping for a single-member LLC shows a simple setup.

Frequently Asked Questions

Is an S corp better than an LLC for taxes?

Not automatically. An S corp election can cut payroll taxes once profit is well above a reasonable salary. Below that point, added costs and a smaller QBI deduction can cancel the savings.

Can an LLC be taxed as an S corp?

Yes. An eligible LLC files Form 2553 and keeps its state LLC status. Only its federal tax treatment changes.

At what income does an S corp make sense?

There’s no IRS cutoff. The election often starts paying off once your profit clearly exceeds a market salary for your work, with enough left over to cover payroll and filing costs.

Do S corp distributions get taxed?

Yes, as income on your personal return through your K-1. They aren’t subject to Social Security or Medicare tax, which is where the savings come from.

Does an S corp election change my liability protection?

No. Liability protection comes from your state LLC or corporation, not from the tax election. Electing S status doesn’t add or remove it.

This article is for general education and isn’t tax or legal advice. Tax rules change, so confirm your situation with a licensed tax professional.