2026 US Self-Employment Tax Calculator (Schedule SE)
Self-employed individuals, independent contractors, freelancers, and sole proprietors pay federal self-employment tax under the Self-Employment Contributions Act (SECA, IRC §1401). Unlike W-2 employees where the employer pays half of FICA taxes, self-employed taxpayers are responsible for both the employer and employee portions — totaling 15.3% (12.4% Social Security and 2.9% Medicare). However, the tax code provides critical relief: only 92.35% of net profit is subject to SE tax, Social Security is capped at $184,500 for 2026, and exactly half of your SE tax is deductible above-the-line on Form 1040 Schedule 1. This calculator computes your exact Schedule SE tax, quarterly estimated payment obligations (1040-ES), and federal income tax savings.
Self-Employment Tax Calculator
Calculates 2026 Schedule SE taxes (12.4% Social Security & 2.9% Medicare) for freelancers, sole proprietors & contractors.
Gross business receipts minus ordinary business expenses (Line 31 of Schedule C or Box 1 of 1099-NEC).
Determines Additional Medicare surtax thresholds ($200k single / $250k married).
0% state tax rate
W-2 earnings already subject to FICA absorb the $184,500 Social Security cap before self-employment income.
Calculation Breakdown
IRC §1402(a)(12): Net earnings multiplied by 92.35% to account for employer FICA deduction
Full 12.4% applied up to $184,500 statutory ceiling
2.9% Hospital Insurance applies to 100% of net self-employment earnings with no ceiling
Above-the-line deduction reduces your Adjusted Gross Income (AGI) dollar-for-dollar
Quarterly voucher installment due in April, June, September, and January
•2026 Social Security wage base cap: $184,500 (maximum OASDI tax: $22,878.00).
•Above-the-line deduction: $5,298.58 is subtracted from your gross income on Form 1040 Schedule 1.
•Remember to make quarterly estimated tax payments via EFTPS or IRS Direct Pay to avoid IRC §6654 underpayment penalties.
How Your 2026 Self-Employment Tax Was Calculated
Based on: $75,000.00 Net Schedule C Earnings • SINGLE • Sole Freelance Income
Net Schedule C Business Earnings
$75,000.00Gross Business Revenue − Qualified Business Expenses = Net Profit
Self-employment tax is assessed strictly on net profit, not top-line gross revenue. If net earnings are below the statutory $400 threshold per IRC §1402(b)(2), no self-employment tax is due.
Statutory 92.35% Base Adjustment (IRC §1402(a)(12))
$69,262.50Taxable SE Base = $75,000.00 × 92.35% (1.00 − 0.0765) = $69,262.50
Under IRC §1402(a)(12), self-employed individuals are granted a 7.65% reduction (half of the 15.3% SECA rate) before applying tax. This deduction equalizes self-employed taxpayers with traditional W-2 employees whose employers pay the 7.65% share on their behalf.
Social Security OASDI Tax (12.4%)
$8,588.55OASDI Tax = $69,262.50 × 12.4% = $8,588.55 (Cap: $184,500)
For the 2026 tax year, the Social Security wage base is $184,500. Any self-employment income beyond this cap is exempt from the 12.4% Social Security portion, capping maximum annual Social Security tax at $22,878.00.
Medicare Hospital Insurance Tax (2.9%)
$2,008.61Medicare Tax = $69,262.50 × 2.9% = $2,008.61 (Uncapped)
Unlike Social Security, Medicare Hospital Insurance tax has no wage ceiling. The full 2.9% rate applies to every dollar of taxable self-employment earnings regardless of how high your income reaches.
Additional Medicare Surtax (0.9% under IRC §3101(b)(2))
$0.00Total earnings ($69,262.50) are below the $200,000.00 threshold — $0.00 surtax
High earners are subject to a 0.9% Additional Medicare Tax on earnings exceeding statutory thresholds: $200,000 for Single/HOH, $250,000 for Married Filing Jointly, and $125,000 for Married Filing Separately.
Above-The-Line Tax Deduction (IRS Form 1040 Schedule 1)
$5,298.58Deductible Portion = 50% × ($8,588.55 + $2,008.61) = $5,298.58
Under IRC §164(f), exactly half of your standard self-employment tax is deductible from your gross income. This is an "above-the-line" deduction claimed on Form 1040 Schedule 1 (Line 15), meaning you receive this tax shield even if you take the standard deduction rather than itemizing.
IRS Form 1040-ES Quarterly Estimated Vouchers
$2,649.29 / installmentQuarterly Payment = $10,597.16 ÷ 4 = $2,649.29
The U.S. tax system operates on a pay-as-you-go basis. Self-employed individuals must pay estimated taxes across four statutory deadlines: Q1 (April 15), Q2 (June 15), Q3 (September 15), and Q4 (January 15). Payments can be remitted securely online via IRS Direct Pay or EFTPS.
How this calculator works
How it works
- 01Net Business Profit Determination: Start with your net business profit (gross revenues minus ordinary and necessary business expenses from Line 31 of IRS Schedule C or Box 1 of 1099-NEC).
- 02Statutory 92.35% Adjustment: Multiply net earnings by 92.35% (IRC §1402(a)(12)) to equalize the self-employed base with W-2 wages after the employer-side deduction.
- 03Social Security Tax Assessment: Apply the 12.4% OASDI tax rate on earnings up to the 2026 statutory wage base ceiling ($184,500), accounting for any W-2 wage income that absorbs the cap first.
- 04Medicare Hospital Insurance: Apply the uncapped 2.9% Medicare tax across 100% of taxable self-employment earnings.
- 05Additional Medicare Surtax Evaluation: Add the 0.9% Additional Medicare Tax under IRC §3101(b)(2) if combined earnings exceed $200,000 ($250,000 for married couples filing jointly).
- 06Above-the-Line Tax Deduction & Quarterly Installments: Automatically calculates the 50% deduction on Form 1040 Schedule 1 and divides total tax into four equal Form 1040-ES quarterly estimated vouchers.
Tax rules that apply
- •Under IRC §1402(b)(2), taxpayers with net self-employment earnings under $400 are completely exempt from federal self-employment tax.
- •The statutory 92.35% factor (1.00 − 0.0765) ensures that self-employed workers do not pay self-employment tax on the portion of income that corresponds to an employer's deductible payroll tax expense.
- •The 2026 Social Security wage base limit is $184,500 (per the Social Security Administration). Any self-employment earnings beyond this ceiling are exempt from the 12.4% Social Security portion, capping maximum annual Social Security tax at $22,878.00.
- •Medicare tax (2.9%) is completely uncapped. High earners are subject to an additional 0.9% surtax on earnings over $200,000 (Single/HOH) or $250,000 (Married Filing Jointly).
- •Half of your total standard self-employment tax is an 'above-the-line' deduction under IRC §164(f). It directly reduces Adjusted Gross Income (AGI) on Form 1040 Schedule 1, regardless of whether you claim the standard deduction or itemize.
Current Tax Rates
| Tax / Deduction | Rate | Notes |
|---|---|---|
| Total Standard SECA Rate | 15.30% | 12.4% Social Security + 2.9% Medicare |
| Taxable Base Multiplier | 92.35% | Statutory deduction of 7.65% under IRC §1402(a)(12) |
| Social Security Tax Rate | 12.40% | Applies to net earnings up to $184,500 wage ceiling |
| 2026 Social Security Wage Cap | $184,500 | Max annual Social Security tax: $22,878.00 |
| Medicare Tax Rate (Uncapped) | 2.90% | Applies to all net self-employment earnings |
| Additional Medicare Tax | 0.90% | Applies to earnings exceeding $200k (Single) / $250k (MFJ) |
| Above-the-Line Tax Deduction | 50.00% | Half of SE tax deducted from AGI on Form 1040 |
What this calculator assumes
- Assumes net trade or business profit subject to federal self-employment tax under IRC §1401.
- W-2 wages from concurrent employment are credited first against the $184,500 Social Security cap.
- Quarterly payments assume annualized steady income across four equal installments.
Where our numbers come from
These calculators are based on official government tax rates and rules. We link directly to the source so you can verify everything yourself.
IRS Schedule SE (Form 1040) — Self-Employment Tax
Internal Revenue Service — U.S. Department of the Treasury
IRS Publication 334 — Tax Guide for Small Business (Schedule C & SE)
Internal Revenue Service — U.S. Department of the Treasury
Social Security Administration — OASDI Wage Base Limit
Social Security Administration (SSA)
Frequently Asked Questions
Why do self-employed taxpayers pay 15.3% tax while W-2 employees pay only 7.65%?
Traditional W-2 employees split FICA payroll taxes equally with their employers: the worker has 7.65% (6.2% Social Security + 1.45% Medicare) deducted from their paycheck, and the employer contributes a matching 7.65% from business funds. Because self-employed individuals are both the worker and the employer, they pay both halves (15.3%). To offset this burden, the IRS allows self-employed workers to deduct half of their SECA tax from their federal taxable income on Form 1040 Schedule 1.
How does the statutory 92.35% multiplier work?
Under IRC §1402(a)(12), self-employment tax is not applied to 100% of your net profit. Instead, you multiply your net profit by 92.35% (100% minus the 7.65% employer-equivalent share). For example, if you earn $100,000 in net profit, you only calculate self-employment tax on $92,350, saving you hundreds of dollars in taxes.
What are the quarterly estimated tax deadlines for self-employed individuals?
The IRS requires estimated tax payments across four statutory due dates: Q1 (April 15), Q2 (June 15), Q3 (September 15), and Q4 (January 15 of the following year). If a deadline falls on a weekend or legal holiday, it rolls over to the next business day. Payments can be submitted electronically using the IRS Direct Pay service or the Electronic Federal Tax Payment System (EFTPS).
Can an S-Corporation save on self-employment taxes?
Yes. In an S-Corporation, business owners divide company profits into 'reasonable W-2 salary' and shareholder 'profit distributions.' While FICA payroll taxes apply to the W-2 salary, shareholder distributions are exempt from self-employment taxes. This corporate structure can yield significant tax savings once annual net earnings surpass $70,000 to $80,000, after accounting for corporate accounting and payroll processing fees.
Do W-2 wages reduce the Social Security tax on self-employment earnings?
Yes! Social Security tax is capped at $184,500 in 2026 across all income sources. If you work a W-2 job where your employer already withheld Social Security tax on your wages, those wages count first toward the $184,500 cap. For example, if you earn $120,000 in W-2 wages and $80,000 in freelance profits, only $64,500 of your self-employment base is subject to the 12.4% Social Security tax.
What happens if I underpay my estimated quarterly taxes?
Under IRC §6654, taxpayers who fail to pay sufficient estimated taxes incur an underpayment penalty. To qualify for the IRS 'Safe Harbor' exemption and avoid penalties, you must pay at least 90% of your current year's tax liability or 100% of your prior year's tax liability (110% if your prior year Adjusted Gross Income exceeded $150,000).
