The Mechanics of Self-Employment Tax (SECA)

As a default single-member LLC, the IRS taxes your business as a "disregarded entity" (Sole Proprietorship). 100% of your net business profit is subject to the 15.3% Self-Employment Tax (comprising 12.4% Social Security up to the annual wage base limit + 2.9% Medicare) in addition to regular federal and state income taxes.

#### How S-Corp Status Unlocks Tax Savings

By filing IRS Form 2553 to elect S-Corporation status, you bifurcate net profit into two distinct financial streams:

1. W-2 Reasonable Compensation: Subject to standard 15.3% FICA payroll taxes.

2. Shareholder Distributions: 100% exempt from the 15.3% self-employment tax.

!Tax Accounting and S-Corporation Calculations

The Mathematical Formula & Break-Even Analysis

Let $P$ represent annual net business profit, $S$ represent the owner's defensible W-2 reasonable salary, and $C_{\text{admin}}$ represent annual S-Corp compliance expenses (payroll software, corporate tax return Form 1120-S, state filing fees):

$\text{Gross Tax Savings} = (P - S) \times 0.153$

$\text{Net Cash Savings} = [(P - S) \times 0.153] - C_{\text{admin}}$

Real Financial Models: Profit Benchmarks

| Annual Net Profit ($P$) | Defensible W-2 Salary ($S$) | Shareholder Distribution ($P - S$) | Gross SE Tax Savings (15.3%) | Annual Admin Costs ($C_{\text{admin}}$) | Net Annual Savings | Recommendation |

| --- | --- | --- | --- | --- | --- | --- |

| $40,000 | $32,000 | $8,000 | $1,224 | $1,800 | -$576 (Net Loss) | Do NOT Elect S-Corp |

| $60,000 | $40,000 | $20,000 | $3,060 | $1,800 | +$1,260 | Marginal / Tipping Point |

| $100,000 | $55,000 | $45,000 | $6,885 | $1,800 | +$5,085 | Highly Recommended |

| $180,000 | $85,000 | $95,000 | $14,535 | $2,200 | +$12,335 | Essential Tax Strategy |

IRS Audit Risk: Revenue Ruling 74-44 & Reasonable Salary

> [!WARNING]

> Under IRS Revenue Ruling 74-44, paying yourself an artificially low W-2 salary (e.g. $15,000 on $150,000 net profit) is classified as tax evasion. If audited, the IRS will reclassify all distributions as wages, imposing back taxes, failure-to-withhold penalties, and compound statutory interest.

To determine a defensible salary, use commercial wage surveys (RCReports / Bureau of Labor Statistics) factoring in your geographic location, hours worked, and industry market replacement costs.

Step-by-Step S-Corp Election Protocol

[x] Confirm business generates sustained net profit exceeding $60,000+ per year

[x] File IRS Form 2553 within 75 days of the start of your tax year (or claim late election relief under Rev. Proc. 2013-30)

[x] Setup an automated payroll system (Gusto, Rippling, or QuickBooks Payroll)

[x] Execute quarterly payroll tax withholdings (Form 941) and annual unemployment filings (Form 940)

[x] File annual corporate tax return Form 1120-S by March 15th

To calculate your quarterly tax obligations, see our guide on Quarterly Estimated Taxes for Founders & 1099 Contractors and test your numbers in our interactive Self-Employed Tax Estimator Tool. For home office expense claims under IRC § 280A, view our Home Office Deduction Guide. For state incorporation comparisons, read our Delaware vs. Wyoming LLC Matrix.