Before we start: I'm a licensed electrician, not a CPA. What follows is the plain-English version of what every contractor I know has had to figure out about LLC vs S-Corp — but for your specific situation, talk to a CPA before you file anything. The math here is right; the question of whether it applies to you needs eyeballs that know your full picture.

With that out of the way, here's the version nobody gives you.

The whole article in two sentences

An LLC is a legal structure. An S-Corp is a tax election. You don't choose one or the other — you form an LLC and then optionally tell the IRS to tax it as an S-Corp once your profit is high enough that the savings are worth the extra paperwork.

That's it. Everything else in this article is just the math behind "high enough" and "extra paperwork."

What you're actually deciding

Every dollar of profit your business makes gets hit by two kinds of tax: regular income tax (which you pay no matter what) and self-employment tax (which is the part this whole conversation is about).

Self-employment tax is 15.3% of your net profit, broken into two pieces:

If you're a default LLC (taxed as a sole proprietorship for single-member, partnership for multi-member), you owe self-employment tax on every dollar of profit your business makes. Make $100K in profit, you owe roughly $14,130 in self-employment tax before you even get to your regular income tax.

The S-Corp election changes that math. It splits your income into two buckets:

That's the whole tax savings mechanic. The dollars above your salary stop getting taxed at 15.3%.

The catch nobody mentions in the YouTube videos

If S-Corps just saved everyone money for free, every business in America would be one. They're not, because S-Corp election adds three real costs:

1. Payroll processing. You have to put yourself on actual payroll with actual paychecks, actual withholding, actual quarterly filings. A payroll service like Gusto or ADP runs $40-$80/month. That's $500-$1,000/year.

2. A second tax return. S-Corps file Form 1120-S separately from your personal return. A CPA charges $1,200-$2,000 to prepare it. You can do it yourself with software, but the IRS scrutinizes S-Corp returns harder than personal returns, and most contractors aren't equipped for it.

3. The "reasonable salary" requirement. The IRS knows the S-Corp game. They require you to pay yourself a "reasonable salary" before you take distributions. If you're an electrician netting $150K and you try to pay yourself a $20K salary to maximize the FICA-free distributions, the IRS will reclassify the distributions as wages, hit you with back payroll taxes, and add penalties on top. Reasonable means what you'd pay someone else to do your job — for a working contractor, that's typically 40-60% of net profit, depending on your trade and market.

Add it up: $1,500 to $3,000 per year in compliance costs to maintain S-Corp status, plus the discipline to actually run payroll instead of just transferring money from the business account to your personal account whenever you need it.

The S-Corp election only makes sense when the tax savings exceed those costs. That's the whole decision.

Three contractors, three answers

Generic articles say "S-Corp makes sense at $40-50K net profit." That's true on average. But "average" hides what actually happens for real contractors. Here are three real scenarios.

Mike — first-year electrician, $35K net profit

Mike is one year into his own electrical business. He's bringing in $85K in revenue, with $50K in expenses (truck, materials subbed out, insurance, tools, fuel, software). Net profit is $35K.

His current setup: single-member LLC taxed as a sole proprietorship.

If he stays LLC: He owes about $4,946 in self-employment tax (15.3% × 92.35% of $35K, since SE tax is calculated on 92.35% of net profit). One Schedule C on his personal return. Done.

If he elects S-Corp: He'd pay himself maybe $25K salary (reasonable for a first-year solo operator), pay $3,825 in payroll taxes on that, take $10K as distribution (skipping FICA on it), saving him roughly $1,530 in self-employment tax. Then he subtracts $1,500-$3,000 in compliance costs.

Mike's verdict: Stay LLC. The S-Corp election would save him almost nothing after compliance costs, while adding payroll headaches and a second tax return. Below ~$40K net profit, the S-Corp math just doesn't work. Mike should focus on growing the business, not tax-engineering pennies.

Sarah — three years in, $100K net profit

Sarah has a residential plumbing business. She's the only employee, takes home roughly $100K after expenses, and is now consistently busy year-round. She formed her LLC three years ago and has been taxed as a sole proprietor the whole time.

Her current setup: single-member LLC, sole proprietor taxation.

If she stays LLC: Self-employment tax on $100K is roughly $14,130. That's $14,130 every year, on top of regular income tax.

If she elects S-Corp: She pays herself a $55K salary (reasonable for a one-person plumbing operation in most markets), pays $8,415 in payroll taxes on that, takes $45K as distribution (skipping FICA). Self-employment tax owed on the distribution: $0. Total payroll-equivalent tax: $8,415. Annual savings: about $5,715.

Subtract her additional compliance costs (~$2,500 for payroll service + S-Corp tax return), and she nets about $3,200 in real savings every year. Over five years, that's $16,000.

Sarah's verdict: Elect S-Corp. She's well above the threshold where the savings exceed costs, and the savings compound year over year. The "reasonable salary" of $55K isn't aggressive — it's defensible if the IRS asks. Worth doing.

Jim — successful HVAC business, $250K net profit

Jim runs an HVAC business with two employees and himself. After paying his crew and all overhead, his personal share of net profit is $250K. He elected S-Corp three years ago.

His setup: LLC with S-Corp tax election.

His current math: He pays himself a $110K salary (reasonable for a working HVAC owner with two employees in his market), $16,830 in payroll taxes on his salary. He takes $140K as distribution — no self-employment tax on it.

If he were still default LLC: He'd owe about $24,860 in self-employment tax on the full $250K (the SS portion caps at the $176,100 wage base, so most of his SE tax is the 2.9% Medicare on the rest). Total tax burden similar but distributed differently.

His annual S-Corp savings: Roughly $8,030 in self-employment tax avoided, minus $3,000 in compliance costs. Net savings: about $5,000/year.

Jim's verdict: S-Corp was the right call when he hit $100K and remains the right call now. At $250K, the savings are meaningful but not transformational — Social Security tax caps at $176,100, so the 12.4% portion of SE tax is already maxed out for him. Above the cap, only the 2.9% Medicare portion of SE tax is being saved. The marginal savings shrink as income rises past the wage base.

How to think about the timing

"When should I elect?" is the second-most-asked question after "should I elect?"

The IRS deadline for electing S-Corp status for the current tax year is March 15. Miss it, and you can either file late with a reasonable cause statement (works most of the time) or wait until next year.

That said, the actual decision isn't about deadlines — it's about whether your profit is consistent enough to justify the change. Don't elect S-Corp the first year you cross $50K. Elect when you've been at $50K+ for two consecutive years and you're confident the trajectory continues. Reverting from S-Corp back to default LLC is possible but messy. Better to wait one extra year and be sure.

The flip side: don't wait too long. Every year you stay in default LLC taxation past your real break-even point is real money out of your pocket. If you've been at $80K+ profit for three years and still haven't elected, you've left $10K-$15K on the table you'll never get back.

State stuff that changes the math

This whole article is about federal tax. State tax can flip the calculation, sometimes meaningfully.

The decision in one paragraph

Form an LLC. Stay default-taxed (sole proprietor for single-member, partnership for multi-member) until your net profit is consistently above $50K. When you've been at $50K+ for two consecutive years and you're confident the next year will be similar or higher, elect S-Corp by filing Form 2553 before March 15. Hire a CPA before you file. Set your reasonable salary at 40-60% of net profit, defensibly comparable to what you'd pay someone else to do your job. Run payroll properly. File your Form 1120-S separately every year. The math will save you $3,000-$8,000 per year for as long as your business stays in the sweet spot, and that money compounds.

Everything else is detail.

One more thing — the part that isn't about taxes

Most articles about LLC vs S-Corp focus entirely on tax math. But there's a non-tax reason to consider the S-Corp election that nobody mentions: it forces you to act like a real business owner.

When you're a default LLC, it's easy to treat your business account like an extension of your personal account. Money comes in, you transfer some to your savings, you buy materials, you pay yourself by Venmo. The lines blur. Bookkeeping gets messy. Tax time gets painful.

S-Corp forces structure. You have a salary you pay yourself on a schedule. You have distributions you take separately. You have to track everything cleanly because the IRS will look at it. That structural discipline alone is worth something — most contractors who switch to S-Corp say their financial visibility improved more than their tax savings did.

That's not a reason to elect before you're ready. But it's a real benefit on top of the tax savings, and it's worth knowing about when you're weighing the decision.

— Jason
Licensed Electrician, Tradesman Office