Self Employment Tax Calculator

Self Employment Tax Calculator

Calculate your self-employment tax for 2026 in seconds. Enter your net self-employment income to see your Social Security and Medicare tax breakdown, the 50% SE deduction that reduces your income tax, and your quarterly estimated payment schedule. Covers Schedule SE rules including the 92.35% adjustment and the $184,500 Social Security wage base.

Self Employment Tax Calculator · 2026

15.3% SE tax · $184,500 SS wage base · 50% deductible · 2026 Schedule SE

Income
Your Situation

Enter your self-employment income to see your Schedule SE tax breakdown.

What Is Self-Employment Tax?

Self-employment tax is the Social Security and Medicare tax paid by people who work for themselves · sole proprietors, freelancers, independent contractors, partners in a partnership, and single-member LLC owners taxed as sole proprietors. It functions as the self-employed version of FICA (the payroll tax W-2 employees split with their employers).

When you're a W-2 employee, your employer withholds 7.65% from your paycheck and pays a matching 7.65% themselves · neither side sees the full 15.3%. As a self-employed worker, you pay both halves. The rate is 15.3% total: 12.4% for Social Security and 2.9% for Medicare. The IRS provides two offsets to make this more manageable: the 92.35% base adjustment and the 50% SE deduction, both explained below.

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2026 SE tax at a glance: 15.3% rate on 92.35% of net SE income. Social Security portion (12.4%) capped at $184,500. Medicare portion (2.9%) applies to all earnings with no cap. Additional Medicare Tax of 0.9% on income above $200,000 single / $250,000 MFJ. Deduct 50% of SE tax on Schedule 1, line 15. Quarterly payments required if you expect to owe $1,000 or more.

How to Calculate Self-Employment Tax (Step by Step)

1
Calculate your net SE income. Start with all income from freelance work, 1099 contracts, your business, or partnership distributions. Subtract all deductible business expenses from Schedule C (equipment, home office, professional services, subscriptions, mileage, health insurance premiums for the self-employed, and so on). This net figure is what SE tax is calculated on.
2
Multiply by 92.35%. The IRS applies a 92.35% multiplier before calculating SE tax. This removes the "employer-equivalent" 7.65% from the base, putting self-employed workers on equal footing with employees who pay income tax only on wages, not on their employer's FICA match. Formula: SE Tax Base = Net SE Income × 0.9235
3
Calculate the Social Security component. Apply 12.4% to the SE base, up to the 2026 Social Security wage base of $184,500. If you also have W-2 wages, they count first against the $184,500 cap. Formula: SS Tax = min(SE Base, $184,500 remaining) × 12.4%
4
Calculate the Medicare component. Apply 2.9% to the full SE base, with no cap. Formula: Medicare Tax = SE Base × 2.9%
5
Add Additional Medicare Tax if applicable. If your total income (W-2 wages + SE income combined) exceeds $200,000 single or $250,000 MFJ, an additional 0.9% applies on the excess. This tax is not matched by the 50% deduction in step 6.
6
Take the 50% SE deduction. Deduct half of the base SE tax (Social Security + Medicare, not Additional Medicare Tax) on Form 1040 Schedule 1, line 15. This is an above-the-line deduction · available whether you itemize or take the standard deduction. It reduces your income tax, not the SE tax itself. Formula: SE Deduction = (SS Tax + Medicare Tax) × 50%
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Worked example · $80,000 net SE income (single filer, 2026):
SE base: $80,000 × 0.9235 = $73,880
Social Security: $73,880 × 12.4% = $9,161
Medicare: $73,880 × 2.9% = $2,143
Total SE tax: $11,303
50% deduction: $5,651 (reduces income tax, no effect on SE tax)
Quarterly payment: ~$2,826 each quarter

How Much Is Self-Employment Tax in 2026?

The total SE tax rate is 15.3%, but effective rates vary by income because the Social Security component caps at $184,500. Here's what SE tax looks like at common income levels for a single filer with no W-2 wages:

Net SE IncomeSE Tax Base (×92.35%)Social SecurityMedicareTotal SE TaxEffective Rate
$25,000$23,088$2,863$670$3,53214.1%
$50,000$46,175$5,726$1,339$7,06514.1%
$75,000$69,263$8,589$2,009$10,59714.1%
$100,000$92,350$11,451$2,678$14,13014.1%
$150,000$138,525$17,177$4,017$21,19414.1%
$200,000$184,700$22,878*$5,356$28,23414.1%
$250,000$230,875$22,878*$6,695$29,57311.8%

* Social Security caps at $184,500 ($184,500 × 92.35% = ~$170,256 × 12.4% = max $22,878 SS SE tax). Rates shown for single filers without Additional Medicare Tax. AXT threshold starts at $200K single.

The 50% SE Tax Deduction: How It Works

The 50% deduction is the most overlooked benefit available to self-employed workers. Here's how it works and why it matters:

What It Is

You can deduct exactly half of your SE tax (Social Security + Medicare components) on Form 1040 Schedule 1, line 15. This deduction reduces your adjusted gross income (AGI), which in turn reduces the income tax you owe. The deduction reflects the fact that employers deduct their FICA matching payments as business expenses; the SE deduction provides equivalent tax treatment to self-employed workers.

What It Does and Does Not Do

The deduction reduces your income tax. The SE tax itself is unchanged. You still owe the full 15.3% SE tax regardless of the deduction. However, the reduction in AGI can have cascading effects: a lower AGI keeps you out of higher income tax brackets, preserves eligibility for certain deductions and credits, and may reduce IRMAA surcharges on Medicare premiums for higher earners.

Example

On $75,000 net SE income: total SE tax is approximately $10,597. The 50% deduction is $5,298. At a 22% income tax rate, that $5,298 deduction saves approximately $1,166 in income tax. The SE deduction requires no itemizing and no special forms · you claim it directly on Schedule 1 of your Form 1040.

Quarterly Estimated Taxes for Self-Employed Workers

Self-employed workers have no employer withholding taxes from their income, which means the IRS requires you to pay estimated taxes four times a year. The general rule: if you expect to owe $1,000 or more in federal taxes after credits, quarterly payments are required. Missing payments triggers an underpayment penalty calculated on Form 2210.

PaymentCovers Income EarnedDue Date (2026)
Q1January 1 – March 31April 15, 2026
Q2April 1 – May 31June 16, 2026
Q3June 1 – August 31September 15, 2026
Q4September 1 – December 31January 15, 2027

The Safe Harbor Rule

To avoid underpayment penalties, pay at least 100% of your prior-year total tax liability across the four quarters (110% if your prior-year AGI exceeded $150,000). This safe harbor protects you even if your actual 2026 tax ends up higher than estimated.

What to Include in Each Payment

Each quarterly payment should cover approximately one-fourth of your estimated total tax · both SE tax and income tax combined. A common rule of thumb for self-employed workers: set aside 25–30% of every 1099 payment or business receipt as it arrives, then pay quarterly from that reserve.

How to Reduce Self-Employment Tax Legally

Maximize Schedule C Deductions

SE tax is calculated on net SE income, so every legitimate business expense deduction directly reduces your SE tax base, cutting both SE tax and income tax simultaneously. Home office, vehicle mileage (67 cents per mile in 2025, final 2026 rate TBD), equipment, software, subscriptions, professional development, health insurance premiums (self-employed), and retirement contributions (for SEP-IRA and Solo 401k) all reduce your taxable SE income.

Elect S-Corporation Status

An S-corporation pays you a "reasonable salary" subject to FICA, and passes remaining profit through to you as a distribution · free of SE tax. On $150,000 of business profit, if you take $80,000 as salary (subject to FICA) and $70,000 as a distribution, SE tax applies only to the $80,000 salary portion rather than the full $150,000. This strategy makes most sense at higher income levels (typically $80,000+ in profit) where the S-corp administrative costs are justified by the SE tax savings.

Self-Employed Retirement Plans

SEP-IRA contributions (up to 25% of net SE income, max $70,000 in 2026) and Solo 401(k) contributions reduce your adjusted gross income, lowering your income tax bracket. Contributions to these accounts leave SE tax unchanged, but they compound the benefit of the SE deduction by pushing your taxable income lower.

The QBI Deduction (Section 199A)

Eligible self-employed individuals can deduct up to 20% of qualified business income (QBI) from taxable income under Section 199A, made permanent by the OBBBA (signed July 4, 2025). This deduction leaves SE tax unchanged, but reduces the income tax owed on the remaining SE income. Income limits and restrictions apply for specified service trades (law, accounting, health, consulting), which phase out the deduction above $201,775 single / $403,500 MFJ in 2026.

Frequently Asked Questions

How much is self-employment tax in 2026? −
Self-employment tax is 15.3% of 92.35% of your net self-employment income. The rate consists of 12.4% for Social Security (applied only to the first $184,500 of net SE income in 2026, up from $176,100 in 2025) and 2.9% for Medicare (no income cap). On $75,000 of net SE income, total SE tax is approximately $10,597. On $50,000, it's approximately $7,065. At incomes above $200,000 (single filers), an additional 0.9% Medicare surtax applies. Use the calculator above to get your exact figure.
What is the self-employment tax rate for 2026? −
The 2026 self-employment tax rate is 15.3%, consisting of 12.4% Social Security and 2.9% Medicare. This applies to 92.35% of your net SE income, not the full amount. The Social Security wage base for 2026 is $184,500, meaning the 12.4% SS component stops once you reach that threshold. The Medicare portion (2.9%) continues on all earnings above the wage base with no ceiling. High earners also pay an Additional Medicare Tax of 0.9% on income above $200,000 (single) or $250,000 (MFJ), bringing their effective Medicare rate to 3.8% on the excess.
How do I calculate self-employment tax? −
To calculate self-employment tax: (1) Determine your net SE income (gross income minus business expenses). (2) Multiply by 0.9235 to get your SE tax base. (3) Multiply the base by 12.4% for the Social Security portion, capped at $184,500 of the base in 2026. (4) Multiply the full base by 2.9% for Medicare. (5) Add both amounts for total SE tax. (6) Deduct half of the SE tax on Schedule 1 of Form 1040 as an above-the-line deduction. The calculator at the top of this page runs all five steps automatically and shows the quarterly payment breakdown.
What is the self-employment tax deduction? −
The SE tax deduction lets you deduct exactly 50% of your SE tax (Social Security + Medicare components) on Form 1040 Schedule 1, line 15. It's an above-the-line deduction · no itemizing required. On $10,000 of SE tax, the deduction is $5,000. At a 22% income tax rate, that $5,000 saves $1,100 in income tax. The deduction reduces income tax but does not reduce the SE tax itself. It mirrors the benefit W-2 employers receive when they deduct their FICA matching payments as a business expense.
How is freelance tax different from self-employment tax? −
Freelance tax and self-employment tax refer to the same thing. If you earn income as a freelancer · writing, design, consulting, development, photography, or any other independent work · the IRS classifies that as self-employment income. You owe SE tax on that income at 15.3%, calculated on your net earnings (after business expenses) multiplied by 92.35%. You also owe regular federal income tax on the same net income, which is separate from SE tax. The combined SE tax plus income tax burden is why freelancers are often advised to set aside 25–30% of every payment they receive.
What is an independent contractor tax calculator? −
An independent contractor tax calculator estimates SE tax for workers who receive 1099 income rather than W-2 wages. Independent contractors are treated as self-employed for tax purposes and owe the full 15.3% SECA tax on 92.35% of their net earnings. The calculator above handles exactly this scenario. Enter your net contract income (or gross income plus expenses) to see your SE tax breakdown, the 50% deduction amount, and your quarterly estimated payment schedule. If you also have W-2 wages from an employer, those wages count toward the $184,500 Social Security cap first, reducing the SS portion of your SE tax.
What is a 1099 tax calculator vs. a self-employment tax calculator? −
A self-employment tax calculator (like this one) focuses specifically on Schedule SE: the 15.3% SECA tax, the 92.35% adjustment, the SS and Medicare breakdown, and the 50% deduction. A 1099 tax calculator typically goes further: it combines SE tax with estimated federal income tax using your income bracket, applies the standard deduction, and outputs a total tax liability estimate including both SE tax and income tax. Use the SE calculator when you want to understand your Schedule SE amount specifically. Use a 1099 calculator when you want to estimate total taxes owed and quarterly payment amounts that cover both SE tax and income tax together.
When does SE tax not apply? −
SE tax does not apply when net self-employment income is under $400 for the year · that is the IRS threshold for filing Schedule SE. Investment income (dividends, capital gains, rental income not tied to active participation) is generally exempt from SE tax, though rental income earned through an active real estate trade may be subject to it. Passive income from limited partnerships also typically falls outside the SE tax base. S-corporation distributions above the reasonable salary component avoid SE tax, which is the core tax planning benefit of the S-corp election. Retirement income, Social Security benefits, and pension payments are never subject to SE tax.
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2026 SE Tax Quick Reference
IRS Schedule SE · 2026 SE tax rate 15.3% total Social Security rate 12.4% (capped) Medicare rate 2.9% (no cap) SE adjustment × 92.35% of net income SS wage base 2026 $184,500 Add'l Medicare Tax +0.9% above $200K/$250K 50% deduction Schedule 1, line 15 SE threshold $400 net SE income
2026 Quarterly Due Dates
Q1 April 15, 2026 Q2 June 16, 2026 Q3 September 15, 2026 Q4 January 15, 2027 Safe harbor 100% of prior-year tax (110% if AGI over $150K) Penalty form Form 2210 Pay via IRS Direct Pay or EFTPS
SE Tax at Common Income Levels
Single filer · 2026 · no W-2 wages $25,000 net ~$3,532 SE tax $50,000 net ~$7,065 SE tax $75,000 net ~$10,597 SE tax $100,000 net ~$14,130 SE tax $150,000 net ~$21,194 SE tax 50% deductible from income tax only