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//// Business · Tax Structure

Business Entity Comparison

Compare Sole Prop, LLC, and S-Corp side-by-side. See SE tax, FICA, federal income tax, formation cost, and ongoing complexity — plus the exact profit level where S-Corp starts winning.

Corp Tax Rate21%
SE Threshold$400
FICA Cap 2024$168,600

Your Situation

Annual Net Profit / Revenue
$
Filing Status
State Income Tax

S-Corp Parameters

Reasonable Salary
$

IRS requires a market-rate W-2 salary. Common range: $40k–$80k depending on your role and industry.

Annual S-Corp Overhead
$

Payroll service (~$600/yr) + additional CPA fees + state S-Corp registration/annual fees.

Sole Proprietor
$69,667
net after tax
$30,333 tax burden
30.3% effective rate
LLC (Default)
$69,667
net after tax
$30,333 tax burden
30.3% effective rate
Best at > $80k
S-Corp
$70,974
net after tax
$29,026 tax burden
29.0% effective rate
S-Corp saves you $1,307/year at $100,000 profit with a $55,000 salary. Break-even is ~$72,693.

Complete Side-by-Side

CategorySole PropLLCS-Corp
SE / FICA Tax$14,130$14,130$8,415
Federal Income Tax$12,287$12,287$13,841
State Income Tax$3,917$3,917$4,270
Overhead / Filing Fees$0$0$2,500
Total Tax Burden$30,333$30,333$29,026
Net After Tax$69,667$69,667$70,974
Effective Rate30.3%30.3%29.0%
Formation Cost$0$50–$500$500–$1,500
Annual Ongoing CostNone$0–$300/yr$1,500–$3,500/yr
ComplexityLowLow–MediumHigh
Recommended at< $40k net$40k–$80k> $80k net

What this calculator doesn't cover

  • QBI (Section 199A) — S-Corps and LLCs may qualify for a 20% pass-through deduction on qualified income
  • Self-employed health insurance deduction — reduces AGI for sole props and S-Corp owners
  • SEP-IRA / Solo 401k — up to 25% of net self-employment income; massive deduction
  • State-specific S-Corp fees — CA charges $800/yr minimum + 1.5% franchise tax on net income
  • Liability protection — LLC and S-Corp both shield personal assets; sole prop does not

Consult a CPA before electing S-Corp status. Uses 2024 federal tax parameters and flat effective state rates.

The S-Corp election (Form 2553) must be filed within 75 days of formation or by March 15 for the current tax year. Missing this deadline means waiting a full year. If you formed your LLC this year and want S-Corp status, act now.

Source: IRS Form 2553 Instructions