LLC vs S-Corp in 2026: How Much Self-Employment Tax Can You Actually Save?

The S-corp election is probably the most over-sold tax strategy on the American internet. Every founder and consultant I work with has seen the pitch: "elect S-corp status and save thousands in self-employment tax." The pitch isn't wrong — but it's incomplete, and the incomplete version has led plenty of business owners into elections that saved them less than they expected, or in a few cases, cost them money.

I advise US-based owners — agencies, e-commerce operators, SaaS founders, real estate businesses — as a fractional CFO, and this question comes up in almost every engagement. So here is the full math for 2026: how self-employment tax actually works, what the S-corp changes, the QBI trade-off most articles skip entirely, and a complete worked example at $120,000 of profit.

How Self-Employment Tax Works

If you operate as a sole proprietor or a single-member LLC with default tax treatment, all of your net business profit is subject to self-employment tax at 15.3% — 12.4% for Social Security and 2.9% for Medicare. Two mechanics soften this slightly:

• SE tax applies to 92.35% of net earnings, not 100% (this adjustment mirrors the employer-side FICA deduction employees get).
• The Social Security portion caps out at the wage base — $184,500 for 2026. The 2.9% Medicare portion has no cap.
• You deduct half of your SE tax against your income tax — a real but modest offset.

This is entirely separate from federal income tax, which you pay on top after your standard deduction — $16,100 single or $32,200 married filing jointly for 2026.

What the S-Corp Election Changes

An S-corp splits your profit into two streams. You must pay yourself a W-2 salary, which bears full payroll taxes (15.3% combined employee and employer FICA, functionally the same burden as SE tax). Whatever profit remains flows to you as a distribution — free of self-employment and payroll tax. The tax saving is 15.3% (or 2.9% above the wage base) on the distribution portion. That's the entire mechanism.

The catch is the salary. The IRS requires "reasonable compensation" for the work you actually perform — and despite what you'll read in forums, there is no official 60/40 or 50/50 rule. Reasonable means what you'd have to pay someone else to do your job: your role, hours, expertise, and what comparable positions pay in your market. Set it artificially low and you're inviting the IRS to reclassify distributions as wages, with back payroll taxes and penalties attached.

Worked Example: $120,000 of Net Profit, Single Filer

Option A — Default LLC (sole proprietorship treatment)

• Earnings subject to SE tax: $120,000 × 92.35% = $110,820
• SE tax: $110,820 × 15.3% = $16,955
• Half of that ($8,478) is deductible against income tax.

Option B — S-corp with a $70,000 reasonable salary

• Payroll taxes on salary: $70,000 × 15.3% = $10,710 (employee + employer FICA combined)
• Remaining profit taken as distribution: no SE tax.
• Headline payroll tax saving: roughly $6,245.

Now the parts the blog posts skip

1. Compliance costs are real. An S-corp needs payroll processing, a separate Form 1120-S, and often state franchise or excise taxes. Budget roughly $1,500–$3,000 a year depending on your state and who does your books. That comes straight out of the $6,245.

2. The QBI deduction shrinks. The Section 199A qualified business income deduction lets many pass-through owners deduct 20% of qualified business income (with a new $400 minimum deduction applying from 2026 for taxpayers with at least modest active business income). Here's the interplay: your W-2 salary is not QBI, but a sole proprietor's entire net profit (less the SE tax deduction) generally is. In Option A, the QBI base is roughly $111,500 — a deduction of about $22,300. In Option B, QBI is only the pass-through profit after salary and employer payroll taxes — roughly $44,600, for a deduction of about $8,900. At a 22–24% marginal rate, the lost deduction claws back roughly $3,000–$3,200 of the payroll tax saving.

Net result at $120K profit: after compliance costs and the QBI effect, the realistic annual saving is typically in the $1,000–$3,500 range — not the $6,000+ headline. Worthwhile, but a far more modest win than the marketing suggests. Push profits toward $200K–$300K with the same reasonable salary, and the math swings decisively in the S-corp's favour, because every incremental dollar of distribution escapes the 2.9% Medicare tax and the QBI dilution proportionally shrinks.

When the S-Corp Election Makes Sense

Situation	Sensible Default
Net profit under ~$50K, or income volatile year to year	Stay a default LLC. Simplicity wins.
Profit $60K–$100K, stable	Run the numbers carefully — often marginal after QBI and compliance costs.
Profit $100K–$180K, stable, owner-operated	S-corp usually wins, with a defensible salary and clean payroll.
Profit well above the wage base ($184,500)	S-corp savings compound; also revisit retirement plan design (solo 401(k), defined benefit).
Planning to raise VC funding	Different conversation entirely — most institutional investors require a C-corp.

Practical Guardrails If You Elect

• Document your salary. Keep a short memo on how you set it — role, hours, market comparables. It's your first line of defence.
• Run real payroll. Quarterly filings, W-2s, state registrations. This is not a spreadsheet exercise.
• Check your state. Some states tax S-corps at the entity level or impose minimum franchise taxes that erode the benefit.
• Coordinate with retirement planning. Your salary sets the ceiling on 401(k) employer contributions — cutting salary too aggressively can cost you sheltered retirement capacity.

One final note: this article is general education, not tax advice for your specific situation — entity decisions should be made with your CPA. But if you want a finance leader who thinks about structure, cash flow, and tax as one integrated system, that's precisely the work we do for US businesses every day. Browse the rest of our free tools or book a call.

Quick FAQ

When is the election due?

Form 2553 is generally due within 2 months and 15 days of the start of the tax year you want the election to take effect, though late-election relief is often available. Plan it with your CPA before year-start, not at filing time.

Does an S-corp change my liability protection?

No. The S-corp is a tax classification, not a different entity. Your LLC's legal liability shield is unchanged — you're only changing how the IRS taxes the profits.

Can non-US residents own an S-corp?

Generally no — S-corp shareholders must be US citizens or residents. Foreign-owned businesses typically choose between a default LLC and a C-corp.