SE tax vs employee FICA Tax year 2026

Q: Is SE tax double what employees pay?

You pay both the employee and employer shares, but on 92.35% of net profit — and you deduct half of SE tax (excluding Additional Medicare) against income tax. Employees see only ~7.65% withheld; employers pay the other half invisibly. Comparing SE tax only to the employee stub is the usual mix-up.

The “15.3% = both halves of FICA” shortcut skips the 92.35% base, the deductible half, and any W-2 wage offset.

Wrong vs right Schedule SE Live calculator

By The PiggyMath Editorial Desk Last updated August 13, 2026 ✓ Dual-checked against Schedule SE / SSA 2026 wage base

Finding: Most articles and many tools treat self-employment tax as a flat 15.3% of profit — “employee + employer FICA.” Schedule SE applies 15.3% to 92.35% of net earnings (~14.13% of profit below the wage base). On $80,000 of net profit that overstates SE tax by about $936 ($12,240 vs $11,304) before counting the ~$5,652 deductible half against income tax. A day-job W-2 can cut the Social Security slice further — ignoring a $150,000 W-2 offset on the same $80k profit overstates by about $4,883. Educational prep only — PiggyMath does not e-file and this is not tax advice.

The wrong rule vs the right rule

Wrong (common): SE tax = 15.3% × Schedule C profit, framed as “exactly the employee + employer FICA total.”

Right (Schedule SE): net earnings = 92.35% × net profit; SE tax = Social Security 12.4% on net earnings up to the remaining wage base + Medicare 2.9% on all net earnings (+ 0.9% Additional Medicare above the Form 8959 threshold). Then deduct roughly half of SE tax (excluding Additional Medicare) on Form 1040. See IRS — Self-Employment Tax and Instructions for Schedule SE.

Still true: you do pay both halves — cash SE tax is much higher than the ~7.65% on a W-2 stub. The myth is the simple 15.3% of profit identity, not that freelancers somehow pay only the employee share.

Figure 1. Wrong vs right — $80,000 net profit, no W-2, tax year 2026
	Wrong (15.3% of profit)	Correct (Schedule SE)	Dollar gap
Taxable base	$80,000 (raw profit)	$73,880 (92.35%)	$6,120
SE / FICA rate applied	15.3%	15.3% on net earnings	—
SE tax dollars	$12,240	$11,304	+$936 overstated
Effective % of profit	15.30%	14.13%	—
Deductible half (income tax)	Often ignored, or half of $12,240	~$5,652	—
Illustrative income-tax benefit @ 22%	—	~$1,243	Further narrows net cost

Source: PiggyMath Schedule SE engine (same as the live Self-Employment Tax Calculator; constants in tax-constants-2026.json). Canonical URL: https://piggymath.com/se-tax-vs-employee-fica/. Not filing advice.

Figure 2. Same $80,000 — employee W-2 vs freelancer net profit (citeable)
	Employee on $80,000 W-2	Freelancer on $80,000 net profit
Social Security + Medicare base	Wages $80,000	92.35% × profit = $73,880
Employee / self-employed share	$6,120 (~7.65%)	$11,304 SE tax (~15.3% on net earnings)
Employer share	$6,120 (paid by employer)	$11,304 SE tax (~15.3% on net earnings)
Visible on pay stub	~7.65% FICA	Nothing withheld — you set aside
Income-tax deduction	None for FICA	~$5,652 deductible half of SE tax
Combined Social Security + Medicare cash	$12,240 (employee + employer)	$11,304 SE tax (92.35% base)

Source: PiggyMath modeled estimates, tax year 2026. The freelancer’s combined Social Security + Medicare cash is actually a bit below the employee+employer total — because of the 92.35% base — even though the freelancer’s out-of-pocket is nearly double the employee stub. Canonical URL: https://piggymath.com/se-tax-vs-employee-fica/

Figure 3. Modeled SE tax vs employee FICA share by earnings band (single, no W-2 offset)
Earnings / profit	Freelancer SE tax	SE as % of profit	Employee FICA withheld	Employer FICA share
$25,000	$3,532	14.1%	$1,913	$1,913
$50,000	$7,065	14.1%	$3,825	$3,825
$80,000	$11,304	14.1%	$6,120	$6,120
$100,000	$14,130	14.1%	$7,650	$7,650
$150,000	$21,194	14.1%	$11,475	$11,475
$200,000	$28,234	14.1%	$14,339	$14,339
$250,000	$29,851	11.9%	$15,514	$15,064

SE tax ≈ 15.3% × 92.35% ≈ 14.13% of profit below the wage base. At $250,000, Social Security is capped and Additional Medicare (0.9%, employee-only / non-deductible half) appears — so SE as a percent of profit dips even as dollars rise. Employer column excludes Additional Medicare.

Figure 4. W-2 offset — $80,000 net profit + $150,000 W-2 Social Security wages (2026)
	Wrong (ignore W-2)	Correct (Schedule SE)	Dollar gap
Net earnings (92.35%)	$73,880		—
Remaining SS wage base	Treat as full $184,500	$34,500 ($184,500 − $150,000)	—
Social Security (12.4%)	$9,161	$4,278	—
Medicare (2.9%)	$2,143	$2,143	—
SE tax total	$11,304	$6,421	+$4,883 overstated

Medicare still hits all net earnings; only the Social Security slice shrinks. Enter Box 3 W-2 wages (or Box 5 when above the wage base) in the calculator below. Canonical URL: https://piggymath.com/se-tax-vs-employee-fica/.

Why the shortcut fails

FICA is 15.3% total (12.4% Social Security up to the wage base + 2.9% Medicare). Employees and employers each pay half. Self-employed people pay both halves through Schedule SE — but the code first knocks 7.65% off the profit (the 92.35% multiplier) so the base looks more like wages after an employer’s deductible payroll share. Then half of the computed SE tax comes off again for income tax. Neither step is “SE tax is 15.3% of profit.”

2026 constants this page uses

SE factor: 92.35% [Schedule SE instructions]
Combined SE rate: 15.3% (12.4% + 2.9%) [IRS SE tax]
Social Security wage base: $184,500 [SSA 2026 CBB]
Additional Medicare: 0.9% above $200,000 single / $250,000 MFJ (not part of the deductible half) [IRS Additional Medicare Q&A]

Machine-readable copies with source URLs live in data/tax-constants-2026.json. Runtime still mirrors these values in assets/app.js. Dual-check process: methodology.

Who is affected / who is not

Affected: sole proprietors, single-member LLCs, and partners who set aside “15.3% of profit,” compare freelancing only to the employee stub, or run a side hustle on top of a W-2 without entering wages into Schedule SE math.

Not this particular mix-up: pure W-2 employees (no Schedule SE); S-corporation owner-employees whose Social Security/Medicare is on W-2 wages (different structure — see S-Corp payroll vs lost QBI).

Same “most tools stop on the old rule” pattern: Solo 401(k) 20% vs 25%, S-Corp payroll vs lost QBI, Form 2210 annualized method, PTC repayment uncapped in 2026, and ACA 400% cliff + retirement.

Run your numbers (embedded SE tax calculator)

Same engine as the dedicated Self-Employment Tax Calculator. Defaults to the Figure 1 case ($80,000 profit, $0 expenses). Add W-2 wages to reproduce Figure 4. Math stays in your browser — we do not e-file.

Your business

Gross self-employment income ($/yr)

Business expenses ($/yr)

W-2 Social Security wages ($/yr) — 0 if none Box 3 of your W-2. If wages are above the $184,500 wage base, enter Box 5 (Medicare wages) so Additional Medicare is offset correctly.

Filing status

Estimated self-employment tax (2026)

—

Social Security (12.4%)

—

Medicare (2.9%)

—

Deductible half

—

Where your SE tax goes

Social Security vs. Medicare share

How to cite

Suggested citation line (copy/paste):

PiggyMath Editorial Desk. “SE Tax vs Employee FICA: Why 15.3% of Profit Is Wrong (2026).” PiggyMath, 13 Aug. 2026, https://piggymath.com/se-tax-vs-employee-fica/. Modeled educational estimates using Schedule SE / FICA rules for tax year 2026.

Methodology Press kit Related: set-aside by income Full SE calculator Solo 401(k) 20% vs 25%

Frequently asked questions

Is self-employment tax just 15.3% of profit?

No. Schedule SE multiplies net profit by 92.35% before applying the 15.3% rates. Below the wage base that is about 14.13% of profit. On $80,000 of net profit the shortcut overstates SE tax by about $936 ($12,240 vs $11,304).

Is SE tax double what employees pay?

You pay both halves, but on 92.35% of net profit, and you deduct half of SE tax (excluding Additional Medicare) against income tax. Employees see only ~7.65% withheld; employers pay the other half invisibly.

Why 92.35% of profit?

Schedule SE multiplies net profit by 92.35% before applying the 15.3% rates — approximating the employer-share deduction (100% − 7.65% = 92.35%).

Does a W-2 job change SE tax?

Yes. W-2 Social Security wages reduce the remaining Social Security wage base. On $80,000 profit with $150,000 W-2 wages, ignoring the offset overstates by about $4,883. Use the calculator above.

Can I cite this explainer?

Yes — link the canonical URL and note that dollar examples are modeled educational estimates for tax year 2026 using PiggyMath’s published Schedule SE math. A ready-made citation line is on this page.

Sources

Every formula on this page is checked against an independent implementation before publication. How we check our math →

PiggyMath provides estimates for educational purposes only and is not financial, tax or legal advice. We help you plan and set aside — we do not e-file returns. No Enrolled Agent or CPA has reviewed this page unless separately disclosed with credentials and a review date.