What is the 2026 Social Security wage base for self-employment?

The Social Security Administration set the 2026 wage base at $184,500. The 12.4% SS portion of SE tax applies only to net SE earnings (after the 92.35% adjustment) up to this amount. All SE earnings are subject to the 2.9% Medicare portion with no cap.

Can I deduct business expenses before calculating self-employment tax?

Yes. SE tax is calculated on net profit -- gross business income minus all legitimate Schedule C deductions. This is why tracking and deducting all allowable business expenses (home office, equipment, software, professional development, health insurance) reduces both SE tax and income tax simultaneously.

Is SE tax the same as the self-employed health insurance deduction?

No, these are separate deductions. The SE tax deduction (half of SE tax) is automatic and reduces AGI. The self-employed health insurance deduction is a separate above-the-line deduction for premiums paid for yourself and your family, also reducing AGI. Neither is an itemized deduction -- both apply even if you take the standard deduction.

How does SE tax interact with a spouse's W-2 income?

When filing jointly, your SE income and your spouse's W-2 wages are combined for income tax purposes but are tracked separately for SE tax. Your SE tax is only on your net self-employment earnings. The Medicare surtax threshold for married filing jointly is $250,000 in combined income from all sources.

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Self-Employment Tax Calculator

Calculate Social Security, Medicare, and federal income tax on self-employment income using 2026 IRS rates and brackets.

Self-Employment Income

Net Self-Employment Profit ($)

Other W-2 or Non-SE Income ($)

Uses 2026 IRS rates: SS wage base $184,500, SE tax 15.3%, standard deduction $16,100.

Tax Breakdown

Enter your net profit and click calculate.

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Introduction

The IRS collected $182 billion in self-employment taxes in fiscal year 2023, and a significant share of that came from freelancers and contractors who either overpaid or were blindsided by their April bill. The problem is structural. When you work as a W-2 employee, your employer pays half of your FICA taxes -- 7.65% -- invisibly. You never see it. The moment you go independent, you owe both halves: 15.3% on top of ordinary income tax. For 2026, Social Security applies at 12.4% on net earnings up to $184,500, and Medicare applies at 2.9% on all earnings, with an additional 0.9% surtax above $200,000. The IRS Publication 334 tax guide for small business outlines these obligations in detail. A contractor earning $120,000 net faces roughly $16,956 in SE tax alone before touching a single federal income tax bracket. This calculator builds your full picture: SE tax, the 92.35% adjustment factor, the above-the-line SE deduction, and your resulting federal income tax -- so there are no April surprises.

What This Calculator Does

This self-employment tax calculator computes the complete federal tax obligation for independent workers using 2026 IRS rates. Enter your net self-employment profit (after business expenses) to get: total SE tax (Social Security + Medicare), the employer-equivalent deduction you can claim on Schedule 1, your federal income tax after the SE deduction and standard deduction, the additional 0.9% Medicare surtax if applicable, and your total combined tax burden with effective rates.

The Formula

SE Tax = (Net Profit x 92.35%) x 15.3% | Federal Tax = Brackets applied to (Net Profit - SE Deduction - Standard Deduction)

The 92.35% factor mirrors the employee-equivalent calculation: employees pay FICA on 100% of wages, but employers deduct their matching share as a business expense. The IRS allows self-employed individuals to apply the same logic by reducing SE earnings to 92.35% before computing FICA. Half of the resulting SE tax ($SE Tax / 2) is then deductible as an above-the-line adjustment on Form 1040 Schedule 1, reducing adjusted gross income before federal income tax is calculated. For 2026, the SS wage base is $184,500; the standard deduction is $16,100 for single filers and $32,200 for married filing jointly.

Step-by-Step Example

Calculate SE taxable earnings

Net profit after all business expenses: $120,000. Multiply by 92.35%: $120,000 x 0.9235 = $110,820. This is the base for FICA.

Compute Social Security and Medicare portions

SS: $110,820 x 12.4% = $13,742. Medicare: $110,820 x 2.9% = $3,214. Total SE tax: $16,956. (No surtax at $120,000 -- that applies above $200,000.)

Apply the SE deduction to income tax

Half of SE tax: $16,956 / 2 = $8,478. Subtract from net profit: $120,000 - $8,478 = $111,522. Then subtract standard deduction (single): $111,522 - $16,100 = $95,422 taxable income.

Calculate federal income tax

2026 federal brackets on $95,422 (single): 10% on first $11,925 = $1,193. 12% on $11,926-$48,475 = $4,386. 22% on $48,476-$95,422 = $10,328. Total federal tax: $15,907. Combined total tax: $16,956 + $15,907 = $32,863. Effective total rate: 27.4%.

Real-World Use Cases

Freelancer Building Quarterly Payment Schedule

A graphic designer earning $85,000 net annually runs this calculator in January to determine quarterly payments. SE tax of $12,012 plus federal income tax of $9,400 totals $21,412 -- divided into four payments of $5,353, due April 15, June 15, September 15, and January 15.

Sole Proprietor Deciding on S-Corp Election

A software consultant with $180,000 net profit uses this calculator to quantify their current SE tax burden ($24,691) before comparing it to the payroll taxes under an S-Corp structure at a $90,000 reasonable salary -- to determine if the administrative costs of S-Corp status are justified.

Contractor Evaluating a Job Offer

A contractor currently earning $130,000 in 1099 income receives a W-2 offer at $110,000. This calculator shows their current all-in federal tax burden so they can compare it against the W-2 take-home using the [1099 vs W-2 Comparison Calculator](/calculator/w2-vs-1099-calculator).

Comparison

Income Level	SE Tax	Federal Income Tax (Single)	Total Federal Tax	Effective Total Rate
$50,000 net	$7,065	$3,018	$10,083	20.2%
$80,000 net	$11,304	$7,618	$18,922	23.7%
$120,000 net	$16,956	$15,907	$32,863	27.4%
$184,500 net (SS cap)	$25,408	$29,897	$55,305	30.0%
$200,000 net	$27,062	$34,107	$61,169	30.6%
$250,000 net	$30,024 + $225 surtax	$48,807	$79,056	31.6%

Common Mistakes to Avoid

Skipping the 92.35% adjustment and computing SE tax on 100% of net profit. This overstates your SE tax by about 8% -- a $120,000 earner would incorrectly calculate $18,360 instead of the correct $16,956.
Forgetting to deduct the employer-equivalent half of SE tax before calculating federal income tax. This deduction ($8,478 on $120,000 net) can shift your federal bracket and reduce income tax by $1,865 or more.
Not tracking the $184,500 SS wage base. If you have multiple income streams (W-2 plus 1099) and your combined wages exceed the cap, you may have overpaid Social Security. Excess SS taxes from multiple jobs are reconciled on your return.
Ignoring the 0.9% Medicare surtax threshold. The additional 0.9% Medicare applies to SE income above $200,000 (single) or $250,000 (married filing jointly). It is not withheld -- you must calculate and pay it yourself.

Frequently Asked Questions

Accuracy and Disclaimer

This calculator provides estimates using 2026 IRS rates including the $184,500 SS wage base, $16,100 single standard deduction, and projected federal income tax brackets. It does not account for state income taxes, self-employed health insurance deductions, retirement contribution deductions (SEP-IRA, Solo 401k), tax credits, or other individual factors. Consult a licensed CPA or enrolled agent for personalized tax planning.

Conclusion

Self-employment tax is the single largest unexpected cost for new freelancers and contractors. Running these numbers quarterly -- not annually -- prevents the cash shortfall that catches many independent workers off guard in April. After computing your SE tax, use the Quarterly Estimated Tax Calculator to set your four payment amounts and deadlines. If you are evaluating whether an S-Corp election could reduce your SE burden at your current income level, the S-Corp Salary vs. Distribution Calculator runs that comparison side by side.