S-Corp vs LLC: When the S-Corp Election Actually Pays

Updated October 20, 2026

Two Different Questions Wearing One Confusing Label

“Should I do an LLC or an S-Corp?” is one of the most common questions in this whole hub, and it’s built on a mix-up that trips up almost everyone the first time. An LLC is a legal entity, something you form with your state. An S-Corp isn’t a competing entity type at all. It’s a federal tax election, something you file with the IRS on top of an entity you already have. You don’t pick one or the other. You form an LLC (or a corporation), and then you decide whether to have the IRS tax it as an S-Corp instead of the default way.

That distinction changes what the real decision is. The entity formation guide covers LLC versus sole proprietorship, which is the liability question. This one covers a different question that comes later: once you have an LLC, should you elect to have it taxed as an S-Corp?

Short version: An S-Corp election splits your business income into a salary (taxed like a paycheck) and distributions (which skip the 15.3% Social Security and Medicare tax). The payroll tax savings are real, but the election also shrinks your 20% QBI deduction and adds payroll and a second tax return, so the true savings are usually a fraction of the headline number. For a single filer clearing $120,000, my worked example below lands around $1,200 to $2,700 a year after costs, and below roughly $50,000 to $80,000 in steady profit it often isn’t worth the hassle.

What an S-Corp Election Actually Changes

Right now, as a sole proprietor or a default single-member LLC, nearly all of your net profit gets hit with the 15.3% self-employment tax, the same math the 1099 tax realities piece walks through in detail. Self-employment tax is just Social Security and Medicare for people without an employer, and you pay both halves. There’s no way around it under the default setup.

An S-Corp election changes that by splitting your income into two buckets. You become an employee of your own business, paid a salary through real payroll, with normal FICA withholding (FICA is the paycheck version of the same Social Security and Medicare tax, 15.3% total between the employer and employee sides). Whatever profit is left after that salary gets paid out to you as a distribution, and distributions aren’t subject to that 15.3%. You still pay regular income tax on every dollar either way. That part doesn’t go away.

To qualify, the business has to meet the IRS’s S-Corp rules: no more than 100 shareholders, owners who are U.S. citizens or residents (not other companies, in most cases), and one class of stock. A one-person or husband-and-wife LLC owned by U.S. residents clears that easily.

The Real Math: Salary, Distributions, and What You Actually Save

Here’s a working example. Say your net profit for the year is $120,000, you file single, and you have no other income.

As a default LLC, self-employment tax runs on 92.35% of that profit:

Taxable SE earnings: $120,000 × 92.35% = $110,820
Social Security portion: $110,820 × 12.4% = $13,741.68
Medicare portion: $110,820 × 2.9% = $3,213.78
Total self-employment tax: about $16,955

With an S-Corp election, say you set a reasonable salary of $65,000 and take the rest as a distribution:

FICA on the $65,000 salary (both halves): $65,000 × 15.3% = $9,945
FICA on the distribution: $0
Total payroll tax: $9,945

That’s about $7,010 less in Social Security and Medicare tax. This is the number most S-Corp pitches stop at. It isn’t what you actually keep, and the next section explains why.

The Catch Most Pitches Skip: Your QBI Deduction Shrinks

The usual line is “an S-Corp saves you 15.3% on everything you take as a distribution.” That’s true for payroll tax and misleading for your total tax bill. The reason is the Qualified Business Income (QBI) deduction, a write-off of up to 20% of your pass-through business profit, made permanent by the 2025 tax law. The salary you pay yourself through an S-Corp is W-2 wages, and W-2 wages don’t count as QBI. So every dollar you move into salary is a dollar that stops earning the 20% deduction.

Running the full federal return for the same $120,000 example (2026 brackets, the $16,100 standard deduction for single filers, half of SE tax deducted on the sole proprietor side, the employer half of FICA deducted by the S-Corp):

Default LLC: QBI deduction about $19,084, income tax about $11,506, plus $16,955 SE tax = about $28,462 total federal tax
S-Corp: QBI deduction about $9,997 (only the roughly $50,000 left after salary and payroll costs qualifies), income tax about $14,267, plus $9,945 FICA and $42 federal unemployment tax = about $24,254 total federal tax
Real federal savings: about $4,208, not $7,010

Then subtract what the S-Corp costs to run. An entry-level payroll service runs about $49 a month plus $6 per person at Gusto or OnPay (the first employee guide compares payroll options), roughly $660 a year for just you. A preparer for the separate business return adds more on top. A rough planning range of $1,500 to $3,000 a year all in is common, though your quotes may differ. That puts net savings in this example around $1,200 to $2,700 a year, before any state fees or state unemployment tax on your salary. Your real numbers move with your salary, your state, and what you already pay for bookkeeping, so plug yours into the S-Corp break-even calculator for the payroll tax side, then knock off the QBI effect shown here.

Where the Break-Even Usually Sits

The savings grow with profit, and the costs are mostly fixed, so there’s a floor below which this isn’t worth doing. The rule of thumb you’ll hear from most tax planners is somewhere around $50,000 to $80,000 in steady net profit, not one good year. That’s a fair rough guide, but treat it loosely. Run the same math at $60,000 profit with a $36,000 salary and the federal savings come to about $2,311 before costs, which a $1,500 to $3,000 overhead can wipe out. At $80,000 with a $45,000 salary, it’s about $3,103 before costs. The higher the salary you can justify relative to profit, the higher your break-even climbs.

One more thing changes at the top end. Social Security tax only applies to the first $184,500 of earnings in 2026, so above that level the sole proprietor side stops paying the 12.4% part anyway, and the gap between the two setups narrows to mostly Medicare. This isn’t a one-time decision. Revisit it every year or two as your profit changes, since a business that didn’t clear the bar two years ago might clear it now.

The Reasonable Salary Trap

Here’s the part that gets people in trouble. The IRS knows exactly why S-Corp owners are tempted to set their own salary as low as possible: every dollar shifted from salary to distribution skips the 15.3%. So it watches this closely, and an unreasonably low salary is a well-known S-Corp audit issue.

The IRS’s own fact sheet on this is blunt. An S-Corp officer who performs real services is an employee, and pay for those services counts as wages no matter what you call it on paper. Courts have backed that up again and again. The factors the IRS and courts weigh include your training and experience, your duties and time spent on the business, what comparable businesses pay for similar work, your dividend history, and how the company sets pay for everyone else.

The practical takeaway: your salary should reflect roughly what you’d have to pay someone else to do your job, based on real pay for your trade and role, not the smallest number you can get away with. If the IRS argues your salary was too low, it can reclassify part of your distributions as wages, with back payroll tax, penalties, and interest. Write down your reasoning when you set the number. Even a simple note on what comparable techs or foremen earn in your area is worth having on file, and the pricing your labor guide is a good place to start on what your hours are really worth.

Two Trade-Offs That Come With a Lower Salary

A lower salary saves payroll tax today, but it also lowers two things you might care about later.

Retirement contributions. With a Solo 401(k), the employer side of your contribution is figured off your W-2 salary once you’re an S-Corp, 25% of wages. In the example above, that’s about $16,250 on a $65,000 salary. As a default LLC, the same employer piece is about 20% of your net self-employment earnings, roughly $22,304 on $120,000 of profit. If you’re trying to stash a lot for retirement, a low salary works against you. The SEP IRA vs Solo 401(k) guide covers how both plans work.

Social Security benefits. Your future benefit is based on the earnings you paid Social Security tax on. Distributions don’t count, so years of a low salary mean a smaller benefit check down the road. The Social Security guide explains how benefits are figured.

The Costs Nobody Mentions Upfront

The tax savings get all the attention in the sales pitch. The ongoing costs are usually the part left out:

A separate tax return. Your LLC now files Form 1120-S, an informational business return, and issues you a Schedule K-1 showing your share of the profit, on top of your personal 1040. For calendar-year businesses, the 1120-S is due March 15.
Real payroll. You need an actual payroll process, even if it’s just you, with withholding calculated and deposited on schedule and quarterly payroll filings. Most people use a payroll service rather than doing this by hand.
Unemployment taxes on your own salary. Federal unemployment tax is about $42 a year per employee after the usual credit, and most states charge their own unemployment tax on your wages too.
Bookkeeping stops being optional. Salary and distributions need to be tracked separately and correctly, which ties straight into the business banking and bookkeeping guide. Clean books matter a lot more once payroll is involved.

Your State Can Change the Math

Federal S-Corp status doesn’t automatically carry over to every state, and some states tax S-Corps on their own. Two examples worth knowing:

New York. A federal S-Corp isn’t automatically a New York S-Corp. You have to file a separate state election, Form CT-6, signed by all shareholders. Without it, New York taxes the business like a regular C corporation. New York S-Corps also pay a fixed-dollar minimum tax based on receipts. And if your business is in New York City, S-Corps are still subject to the city’s General Corporation Tax, which a plain single-member LLC doesn’t pay.
California. S-Corps pay a 1.5% tax on California income, with an $800 annual minimum.

Check your own state’s rules before assuming the federal math is the whole story.

The Health Insurance Wrinkle

This one catches people off guard. If you own more than 2% of the S-Corp (as the sole owner, you do) and the business pays your health insurance premiums, those premiums have to show up as wages in Box 1 of your own W-2. They’re not subject to Social Security, Medicare, or unemployment tax, but they do count for income tax. Handle it that way and you can still take the self-employed health insurance deduction on your personal return. Skip this step and you can lose that deduction. It’s a small mechanical detail that trips up a lot of first-year S-Corp owners. The self-employed health insurance guide covers your coverage options.

What Doesn’t Change

Your LLC stays your LLC. The election doesn’t touch your state registration, your liability protection, or your day-to-day operations. If your LLC is set up correctly with the separation the entity formation guide covers (its own bank account, no mixing personal and business money), that protection carries forward exactly as it was. The piercing the corporate veil guide explains how owners lose that protection, and none of it depends on your tax election. One thing to update: your operating agreement should reflect how you pay yourself once salary and distributions are separate.

How and When to Actually Elect

The election itself is IRS Form 2553. An LLC filing it doesn’t need a separate Form 8832 to be treated as a corporation first. The form is due no more than two months and 15 days after the start of the tax year you want it to apply to. For an existing calendar-year business, that’s March 15 (March 15, 2027 falls on a Monday). For a brand-new entity, the clock starts when the business begins its first tax year. The instructions say to mail or fax it to the IRS service center for your area.

Miss the window and the election normally waits until the next tax year. There’s a way back: Revenue Procedure 2013-30 allows late elections if you had reasonable cause, acted promptly once you noticed, and file within 3 years and 75 days of the date you wanted the election to start. It’s commonly granted when the paperwork is clean, but it isn’t automatic.

Once you’re an S-Corp, your salary gets withholding like any W-2 job, but the distribution side usually still needs quarterly estimated payments. The quarterly tax estimator can help you size them.

Run Your Own Numbers First

Practically, the decision tends to land at the end of a strong year. If this year’s profit is running well past the break-even range and next year looks similar, that’s the time to sit down with a tax preparer before the March 15 deadline. Bring three things: your real profit, a salary number you can defend for your trade, and the full federal picture including the QBI effect, not just the payroll tax line. If the savings after costs come out to a few hundred dollars, the simpler setup is probably the better deal.

Related Guides

S-Corp break-even calculator: test your own profit and salary numbers.
1099 self-employment tax realities: the default setup this election is compared against.
SEP IRA vs Solo 401(k): how your salary choice affects retirement savings.
Technician to business owner: the systems that matter more than your tax setup.

This article is for general informational purposes only and isn’t financial, legal, insurance, or tax advice. For guidance specific to your situation, talk to a licensed professional.

Frequently Asked Questions

No. An S-Corp is a federal tax election, filed on Form 2553, not a separate legal entity type. You form an LLC (or a corporation) under state law first, and the S-Corp election just changes how the IRS taxes that same entity. Your LLC stays an LLC for every legal purpose.

The common rule of thumb is $50,000 to $80,000 in steady annual net profit, but it moves a lot with your salary and costs. Once you count the smaller QBI deduction, payroll costs, and a second tax return, savings at $60,000 to $80,000 in profit can be small or close to zero. Run your own numbers before electing.

Usually, yes. The salary you pay yourself is W-2 wages, and wages don’t count as qualified business income, so only the profit left after salary earns the 20% deduction. In a $120,000 example with a $65,000 salary, the QBI deduction drops from about $19,084 to about $9,997, which eats into the payroll tax savings.

No. Your salary has to be reasonable for the work you actually do, based on factors like comparable pay in your trade, your training, and the time you put in. An unreasonably low salary is a well-known audit issue, and the IRS can reclassify distributions as wages, with back payroll tax, penalties, and interest.

No. Liability protection comes from the LLC itself, not the tax election. If your LLC was set up and maintained correctly, that protection carries forward exactly the same after electing S-Corp status.

Form 2553 is due no more than two months and 15 days after the start of the tax year it should apply to, which is March 15 for an existing calendar-year business. Miss it and the election normally starts the next year, though late-election relief under Revenue Procedure 2013-30 is available within 3 years and 75 days if you had reasonable cause.

Yes. A federal S-Corp isn’t automatically a New York S-Corp. You file Form CT-6, signed by all shareholders, or New York taxes the business like a regular C corporation. In New York City, S-Corps also pay the city’s General Corporation Tax.

Often, yes. Your salary gets regular payroll withholding, like a W-2 job. But income tax on the distribution side, and any gap withholding doesn’t cover, usually still needs quarterly estimated payments. The quarterly estimated taxes guide covers the mechanics.

Sources

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S-Corp vs. LLC: What the Election Actually Changes for 2026